{"id":114507,"date":"2023-10-05T20:53:11","date_gmt":"2023-10-05T20:53:11","guid":{"rendered":"https:\/\/www.takomabattery.com\/?p=114507"},"modified":"2023-10-23T00:35:04","modified_gmt":"2023-10-23T00:35:04","slug":"ebike-bms","status":"publish","type":"post","link":"https:\/\/www.takomabattery.com\/fr\/ebike-bms\/","title":{"rendered":"Comprendre les diff\u00e9rentes architectures de bms pour v\u00e9los \u00e9lectriques - avantages et inconv\u00e9nients"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"114507\" class=\"elementor elementor-114507\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4ae1ce64 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4ae1ce64\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-71def42b\" data-id=\"71def42b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1e9a6783 elementor-widget elementor-widget-heading\" data-id=\"1e9a6783\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Understanding the different ebike bms architectures - pros and cons<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-633341b4 elementor-widget elementor-widget-spacer\" data-id=\"633341b4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-36c4017a elementor-widget elementor-widget-text-editor\" data-id=\"36c4017a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div style=\"padding-left: 2.2em;padding-right: 2.2em;line-height: 40px\"><p>In recent years, the electric two-wheeler market has ushered in a new upsurge of development. <a href=\"https:\/\/www.takomabattery.com\/lithium-ion-battery-replacement-lead-acid-batteries-the-ultimate-faq-guide\/\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline\"><span style=\"color: #333399;text-decoration: underline\">Lithium battery replacement lead acid<\/span><\/span><\/a> is also a trend. However, lithium batteries are less safe than lead-acid batteries.<\/p><p>Thus, a strict battery management system (Battery Management System, BMS) is required to monitor and protect lithium batteries. This article will introduce several common <strong>ebike BMS<\/strong> architectures as well as the advantages and disadvantages of different architectures and their usage scenarios.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5d2714d1 elementor-widget elementor-widget-spacer\" data-id=\"5d2714d1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-22724168 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"22724168\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;exclude_headings_by_selector&quot;:&quot;.paichu_post&quot;,&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;],&quot;marker_view&quot;:&quot;numbers&quot;,&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<div class=\"elementor-toc__header-title\">\n\t\t\t\tTable of Contents\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__22724168\" aria-expanded=\"true\" aria-label=\"Open table of contents\"><i aria-hidden=\"true\" class=\"fas fa-chevron-down\"><\/i><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__22724168\" aria-expanded=\"true\" aria-label=\"Close table of contents\"><i aria-hidden=\"true\" class=\"fas fa-chevron-up\"><\/i><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__22724168\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<i class=\"elementor-toc__spinner eicon-animation-spin eicon-loading\" aria-hidden=\"true\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-33623b1b elementor-widget elementor-widget-spacer\" data-id=\"33623b1b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2d058b9f uael-aspect-ratio-16_9 uael-youtube-subscribe-no elementor-widget elementor-widget-uael-video\" data-id=\"2d058b9f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"uael-video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"uael-video__outer-wrap  uael-video-type-youtube\" data-device=\"false\" data-vsticky=\"no\" data-hidedesktop=\"\" data-hidetablet=\"\" data-hidemobile=\"\" data-vsticky-viewport=\"0\" data-autoplay=\"0\">\n\t\t\t\t\t\t<div class=\"uael-video-inner-wrap\">\n\t\t\t\t<div class=\"uael-video__play\" data-src=\"https:\/\/www.youtube.com\/embed\/KDaBn9PLRKI?rel=0&amp;start&amp;end&amp;controls=1&amp;mute=0&amp;modestbranding=0&amp;autoplay=1\">\n\t\t\t\t\t<img decoding=\"async\" class=\"uael-video__thumb\" src=\"https:\/\/i.ytimg.com\/vi\/KDaBn9PLRKI\/maxresdefault.jpg\" alt=\"\"><\/img>\n\t\t\t\t\t<div class=\"uael-video__play-icon uael-animation-\">\n\t\t\t\t\t\t<svg height=\"100%\" version=\"1.1\" viewBox=\"0 0 68 48\" width=\"100%\"><path class=\"uael-youtube-icon-bg\" d=\"m .66,37.62 c 0,0 .66,4.70 2.70,6.77 2.58,2.71 5.98,2.63 7.49,2.91 5.43,.52 23.10,.68 23.12,.68 .00,-1.3e-5 14.29,-0.02 23.81,-0.71 1.32,-0.15 4.22,-0.17 6.81,-2.89 2.03,-2.07 2.70,-6.77 2.70,-6.77 0,0 .67,-5.52 .67,-11.04 l 0,-5.17 c 0,-5.52 -0.67,-11.04 -0.67,-11.04 0,0 -0.66,-4.70 -2.70,-6.77 C 62.03,.86 59.13,.84 57.80,.69 48.28,0 34.00,0 34.00,0 33.97,0 19.69,0 10.18,.69 8.85,.84 5.95,.86 3.36,3.58 1.32,5.65 .66,10.35 .66,10.35 c 0,0 -0.55,4.50 -0.66,9.45 l 0,8.36 c .10,4.94 .66,9.45 .66,9.45 z\" fill=\"#1f1f1e\"><\/path><path d=\"m 26.96,13.67 18.37,9.62 -18.37,9.55 -0.00,-19.17 z\" fill=\"#fff\"><\/path><path d=\"M 45.02,23.46 45.32,23.28 26.96,13.67 43.32,24.34 45.02,23.46 z\" fill=\"#ccc\"><\/path><\/svg>\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7feee410 elementor-widget elementor-widget-spacer\" data-id=\"7feee410\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-69e44073 elementor-widget elementor-widget-text-editor\" data-id=\"69e44073\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div style=\"padding-left: 2.2em;padding-right: 2.2em;line-height: 40px\"><h2 id=\"Ebike-BMS-architecture\">Ebike BMS architecture<\/h2><p>Figure 1 shows a typical ebike BMS architecture. It usually consists of batteries, analog front-end, second-stage protection, main control, etc.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5e51439 elementor-widget elementor-widget-image\" data-id=\"5e51439\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1000\" height=\"500\" src=\"https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-1.-Typical-ebike-BMS-architecture.webp\" class=\"attachment-large size-large wp-image-110981\" alt=\"Figure 1. Typical ebike BMS architecture\" srcset=\"https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-1.-Typical-ebike-BMS-architecture.webp 1000w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-1.-Typical-ebike-BMS-architecture-300x150.webp 300w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-1.-Typical-ebike-BMS-architecture-768x384.webp 768w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-1.-Typical-ebike-BMS-architecture-600x300.webp 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a33f539 elementor-widget elementor-widget-text-editor\" data-id=\"a33f539\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div style=\"padding-left: 2.2em;padding-right: 2.2em;line-height: 40px\"><p>Use AFE to control MOS on-off and secondary protection chip to control three-terminal FUSE fusing for double protection, which is double protection in the true sense. A qualified ebike BMs can pass various functional safety certifications.<\/p><h2 id=\"Ebike-BMS-architecture-types\">Ebike BMS architecture types<\/h2><h3 id=\"High-side-serial-architecture\">High-side serial architecture<\/h3><p>The high-side series architecture is shown in Figure 2. Both CFET and DFET are placed on the high side and connected in series, so it is called high side series architecture.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9f93063 elementor-widget elementor-widget-image\" data-id=\"9f93063\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1000\" height=\"500\" src=\"https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-2.-High-side-serial-architecture.webp\" class=\"attachment-large size-large wp-image-110982\" alt=\"Figure 2. High-side serial architecture\" srcset=\"https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-2.-High-side-serial-architecture.webp 1000w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-2.-High-side-serial-architecture-300x150.webp 300w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-2.-High-side-serial-architecture-768x384.webp 768w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-2.-High-side-serial-architecture-600x300.webp 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7d06e37 elementor-widget elementor-widget-text-editor\" data-id=\"7d06e37\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div style=\"padding-left: 2.2em;padding-right: 2.2em;line-height: 40px\"><strong>Advantage analysis:<\/strong><br \/>1) BMS does not need to be isolated from external communication, all refer to pack- as the reference ground.2) PACK &#8211; there is no short-circuit surge impact problem.<p>3) The BMS drive circuit does not have a withstand voltage problem, and pack- is always at the same potential as B-.<\/p><p><strong>Disadvantage analysis:<\/strong><br \/>If NMOS is used for high-side control, a boost circuit is required to turn on NMOS, and the driving voltage of gs+B+ can drive NMOS to turn on.<\/p><p>It will increase the cost of the boost circuit. If a PMOS circuit is used, the control is relatively simple, and the cost of PMOS is greater than that of NMOS.<\/p><h3 id=\"High-side-parallel-architecture\">High-side parallel architecture<\/h3><p>The high-side parallel architecture is shown in Figure 3. Both CFET and DFET are placed on the high side and connected in parallel, so it is called high side parallel architecture.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-29b6a05 elementor-widget elementor-widget-image\" data-id=\"29b6a05\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1000\" height=\"500\" src=\"https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-3.-High-side-parallel-architecture.webp\" class=\"attachment-large size-large wp-image-110983\" alt=\"Figure 3. High-side parallel architecture\" srcset=\"https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-3.-High-side-parallel-architecture.webp 1000w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-3.-High-side-parallel-architecture-300x150.webp 300w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-3.-High-side-parallel-architecture-768x384.webp 768w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-3.-High-side-parallel-architecture-600x300.webp 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9c22ef8 elementor-widget elementor-widget-text-editor\" data-id=\"9c22ef8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div style=\"padding-left: 2.2em;padding-right: 2.2em;line-height: 40px\"><strong>Advantage analysis:<\/strong><br \/>The cost of charging and discharging isochronous interface solution is reduced, the selection of charging MOS refers to the charging current, and the selection of discharging MOS refers to the discharge current. cost will be lower<p><strong>Disadvantage analysis:<\/strong><br \/>It cannot prevent some misoperations. Charging at the charging port and discharging port will cause fatal damage to the battery cell.<\/p><h3 id=\"Low-side-series-architecture\">Low-side series architecture<\/h3><p>The low-side series architecture is shown in Figure 4. Both CFET and DFET are placed on the low side and connected in series, so it is called low side series architecture.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f5815c2 elementor-widget elementor-widget-image\" data-id=\"f5815c2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"500\" src=\"https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-4.-Low-side-series-architecture.webp\" class=\"attachment-large size-large wp-image-110984\" alt=\"Figure 4. Low-side series architecture\" srcset=\"https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-4.-Low-side-series-architecture.webp 1000w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-4.-Low-side-series-architecture-300x150.webp 300w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-4.-Low-side-series-architecture-768x384.webp 768w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-4.-Low-side-series-architecture-600x300.webp 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4255272 elementor-widget elementor-widget-text-editor\" data-id=\"4255272\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div style=\"padding-left: 2.2em;padding-right: 2.2em;line-height: 40px\"><strong>Advantage analysis:<\/strong><br \/>Currently the most widely used ebike BMS solution, with low cost and simple drive control.<p><strong>Disadvantage analysis:<\/strong><br \/>It is necessary to deal with various problems caused by the potential inconsistency between B- and P- when they are turned off.<\/p><h3 id=\"Low-side-parallel-architecture\">Low-side parallel architecture<\/h3><p>The low-side parallel architecture is shown in Figure 5. Both CFET and DFET are placed on the low side and connected in parallel, so it is called low side parallel architecture.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-743b77f elementor-widget elementor-widget-image\" data-id=\"743b77f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"500\" src=\"https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-5.-Low-side-parallel-architecture.webp\" class=\"attachment-large size-large wp-image-110985\" alt=\"Figure 5. Low-side parallel architecture\" srcset=\"https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-5.-Low-side-parallel-architecture.webp 1000w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-5.-Low-side-parallel-architecture-300x150.webp 300w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-5.-Low-side-parallel-architecture-768x384.webp 768w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-5.-Low-side-parallel-architecture-600x300.webp 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a931a9e elementor-widget elementor-widget-text-editor\" data-id=\"a931a9e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div style=\"padding-left: 2.2em;padding-right: 2.2em;line-height: 40px\"><strong>Advantage analysis:<\/strong><br \/>The cost of charging and discharging isochronous interface solution is reduced. The selection of charging MOS refers to the charging current, and the selection of discharging MOS refers to the discharge current. The cost will be lower.<p><strong>Disadvantage analysis:<\/strong><br \/>It cannot prevent some misoperations. Charging at the charging port and discharging port will cause fatal damage to the battery cell.<\/p><h2 id=\"Choose-the-right-ebike-BMS-architecture\">Choose the right ebike BMS architecture<\/h2><p>The main difference between the above four ebike BMS architecture architectures lies in two points: one difference is whether the CFET and DFET are placed on the high side or the low side; the other difference is whether the CFET and DFET are connected in series or in parallel.<\/p><p>According to different application occasions, the appropriate ebike BMS architecture should be selected. The main considerations when selecting different ebike BMS architectures are introduced below.<\/p><h3 id=\"High-side-or-low-side\">High side or low side<\/h3><p>The low-side solution is currently a relatively mature and easy-to-implement solution, and most two-wheelers are also designed based on the low-side solution. At the same time, most of the current analog front-ends also integrate low-side drive capabilities.<\/p><p>However, there is a disadvantage in the low-side protection scheme: when CFET and DFET are turned off, once the protection is triggered to turn off the charging and discharging FETs, the battery side and the system side can no longer achieve direct communication.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b0a9925 elementor-widget elementor-widget-image\" data-id=\"b0a9925\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"500\" src=\"https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Choose-the-right-ebike-BMS-architecture.webp\" class=\"attachment-large size-large wp-image-110989\" alt=\"Choose the right ebike BMS architecture\" srcset=\"https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Choose-the-right-ebike-BMS-architecture.webp 1000w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Choose-the-right-ebike-BMS-architecture-300x150.webp 300w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Choose-the-right-ebike-BMS-architecture-768x384.webp 768w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Choose-the-right-ebike-BMS-architecture-600x300.webp 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-89cbde9 elementor-widget elementor-widget-text-editor\" data-id=\"89cbde9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div style=\"padding-left: 2.2em;padding-right: 2.2em;line-height: 40px\"><p>Compared with the low-side protection scheme, even after the protection is triggered, the <a href=\"https:\/\/www.takomabattery.com\/top-reasons-to-use-lithium-battery-pack-for-electronic-devices\/\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline\"><span style=\"color: #333399;text-decoration: underline\">battery pack<\/span><\/span><\/a> and the system side are still common ground.<\/p><p>Therefore, mutual communication can still be realized without increasing isolated communication. And disconnect the positive terminal of the battery after triggering the protection, the system is more secure.<\/p><h3 id=\"Series-or-parallel\">Series or parallel<\/h3><p>The charge port and discharge port of the series architecture share one port, but the disadvantage is that the number of CFETs and DFETs needs to be selected according to the maximum value of the charge and discharge current.<\/p><p>If the difference between the charging current and the discharging current is relatively large, for example, the charging current of a general electric vehicle lithium battery pack is smaller than the discharging current, and if the series structure is selected, it is necessary to select more CFETs than actually needed, resulting in unnecessary waste.<\/p><p>Compared with the series architecture, the parallel architecture can select the number and type of CFETs and DFETs according to the actual charging and discharging current needs.<\/p><p>The disadvantage is that the reverse current needs to be considered, such as flowing through the body diode of the DFET to the battery core.<\/p><p>To block these current paths, additional circuit assistance is required. In addition, the parallel architecture requires an extra power line and an extra port, which is not suitable for some occasions.<\/p><h2 id=\"Other-ebike-BMS-architectures\">Other ebike BMS architectures<\/h2><p>In addition to the above classification according to the positions of CFETs and DFETs, the ebike BMS architecture can also be classified according to the number of analog front ends, whether there is an MCU, etc.<\/p><h3 id=\"Cascade-architecture\">Cascade architecture<\/h3><p>According to the number of analog front ends, ebike BMS can be divided into cascade architecture and non-cascade architecture.<\/p><p>The current mainstream ebike BMS, such as electric bicycles, scooters, and self-balancing vehicles, generally use 10S, 14S or 16S battery packs, and a BQ769x2 can support them. Therefore, for the current mainstream ebike BMS, the above-mentioned single AFE solution can be used.<\/p><p>Figure 2 ~ Figure 5 are all non-cascaded architectures. However, for some applications that require relatively large power, such as electric light motorcycles or electric motorcycles, the voltage is usually higher than 60V.<\/p><p>It is necessary to use a battery pack higher than 16 strings to achieve greater power, and a single BQ76952 is not enough to support it. It is necessary to use two chips for cascade use, that is, to adopt a cascade ebike BMS architecture.<\/p><h3 id=\"Independent-architecture\">Independent architecture<\/h3><p>According to the presence or absence of MCU, ebike BMS can be divided into independent architecture and non-independent architecture. Figure 2 ~ Figure 5 all work with MCU, so they are all non-independent architectures.<\/p><p>In Figure 7, the AFE works independently from the MCU, so it is a standalone architecture. When the BQ769x2 works in stand-alone mode, it can still monitor the battery status and control the charge and discharge FETs.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-765b2cb elementor-widget elementor-widget-image\" data-id=\"765b2cb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"500\" src=\"https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-7.-Independent-architecture.webp\" class=\"attachment-large size-large wp-image-110994\" alt=\"Figure 7. Independent architecture\" srcset=\"https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-7.-Independent-architecture.webp 1000w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-7.-Independent-architecture-300x150.webp 300w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-7.-Independent-architecture-768x384.webp 768w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/08\/Figure-7.-Independent-architecture-600x300.webp 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-76f50d2 elementor-widget elementor-widget-text-editor\" data-id=\"76f50d2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div style=\"padding-left: 2.2em;padding-right: 2.2em;line-height: 40px\"><p>When the protection condition is triggered, the FETs are automatically controlled to turn off to implement protection, and when the protection condition is removed, the FETs are automatically restored to conduct.<\/p><p>The advantage of the independent ebike BMS architecture is that one MCU can be saved, which is suitable for applications with strict cost requirements. However, due to the lack of MCU, there is a loss in flexibility. Users need to choose an independent or non-independent ebike BMS architecture according to actual needs.<\/p><h2 id=\"Summary\">Summary<\/h2><p>As the <a href=\"https:\/\/www.takomabattery.com\/the-most-complete-faq-guide-about-battery-swapping-station\/\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline\"><span style=\"color: #333399;text-decoration: underline\">battery swapping<\/span><\/span><\/a> model becomes more sophisticated, users can expect e-bike battery management systems (BMS) to become more efficient and cost-effective in the near future. The development of more advanced BMS technology will also lead to longer battery life, better performance and improved safety.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-199e0525 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"199e0525\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-31e0c51d\" data-id=\"31e0c51d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-479b57a1 elementor-author-box--link-yes elementor-author-box--avatar-yes elementor-author-box--name-yes elementor-author-box--biography-yes elementor-widget elementor-widget-author-box\" data-id=\"479b57a1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"author-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-author-box\">\n\t\t\t\t\t\t\t<div  class=\"elementor-author-box__avatar\">\n\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.takomabattery.com\/wp-content\/uploads\/2023\/07\/cropped-images.webp\" alt=\"Image de Honey\" loading=\"lazy\">\n\t\t\t\t<\/div>\n\t\t\t\n\t\t\t<div class=\"elementor-author-box__text\">\n\t\t\t\t\t\t\t\t\t<div >\n\t\t\t\t\t\t<div class=\"elementor-author-box__name\">\n\t\t\t\t\t\t\tHoney\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-author-box__bio\">\n\t\t\t\t\t\tHello, I am Honey. Whether you're interested in using lithium batteries for your next DIY project, or working in the renewable energy space, my blog is an invaluable resource that can help you stay abreast of the latest developments in this rapidly evolving field.\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<a class=\"elementor-author-box__button elementor-button elementor-size-xs\" href=\"https:\/\/www.takomabattery.com\/fr\/author\/honey\/\">\n\t\t\t\t\t\tAll Posts\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-20ba3650 elementor-widget elementor-widget-spacer\" data-id=\"20ba3650\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div 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https:\/\/www.takomabattery.com\/wp-content\/uploads\/2022\/04\/Top-50-battery-management-system-manufacturers-in-China-in-2022-768x576.jpg 768w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2022\/04\/Top-50-battery-management-system-manufacturers-in-China-in-2022-600x450.jpg 600w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2022\/04\/Top-50-battery-management-system-manufacturers-in-China-in-2022.jpg 1000w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div>\n\t\t<\/a>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<div class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.takomabattery.com\/fr\/top-50-battery-management-system-manufacturers-in-china-in-2022\/\" target=&quot;_blank&quot;>\n\t\t\t\tTop 50 battery management system manufacturers in China in 2022\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tavril 29, 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two-wheelers battery manufacturers in China\" srcset=\"https:\/\/www.takomabattery.com\/wp-content\/uploads\/2022\/01\/Top-10-two-wheelers-battery-manufacturers-in-China-300x225.jpg 300w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2022\/01\/Top-10-two-wheelers-battery-manufacturers-in-China-768x576.jpg 768w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2022\/01\/Top-10-two-wheelers-battery-manufacturers-in-China-600x450.jpg 600w, https:\/\/www.takomabattery.com\/wp-content\/uploads\/2022\/01\/Top-10-two-wheelers-battery-manufacturers-in-China.jpg 1000w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/div>\n\t\t<\/a>\n\t\t\t\t<div class=\"elementor-post__text\">\n\t\t\t\t<div class=\"elementor-post__title\">\n\t\t\t<a href=\"https:\/\/www.takomabattery.com\/fr\/top-10-two-wheelers-battery-manufacturers-in-china-in-2022\/\" target=&quot;_blank&quot;>\n\t\t\t\tTop 10 two-wheelers battery manufacturers in China in 2022\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-post__meta-data\">\n\t\t\t\t\t<span class=\"elementor-post-date\">\n\t\t\tf\u00e9vrier 5, 2022\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/article>\n\t\t\t\t<\/div>\n\t\t\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Cet article pr\u00e9sente plusieurs architectures de BMS pour v\u00e9los \u00e9lectriques, ainsi que les avantages et les inconv\u00e9nients des diff\u00e9rentes architectures et leurs sc\u00e9narios d'utilisation.<\/p>","protected":false},"author":7,"featured_media":110988,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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