[{"data":1,"prerenderedAt":245},["ShallowReactive",2],{"guide-zh-jk-bms-weak-cell-log":3,"guides-zh":187},{"id":4,"title":5,"body":6,"date":166,"description":167,"extension":168,"keywords":169,"meta":176,"navigation":177,"path":178,"related":179,"seo":183,"stem":184,"updated":185,"__hash__":186},"guides_zh\u002Fguides\u002Fjk-bms-weak-cell-log.md","用 JK BMS 日志找出弱单体：触发、压差与均衡",{"type":7,"value":8,"toc":152},"minimark",[9,19,23,26,39,42,45,48,51,54,57,60,67,85,88,91,99,106,109,121,124,130,135,138,142,145,149],[10,11,12,13,18],"p",{},"如果每次都是同一节单体最先到达限值，你很可能遇到了弱单体，而 JK BMS 详细日志能把它显示出来。每次保护动作都会记录单体编号，以及最高和最低单体电压的快照。统计每节单体的触发次数，再看触发那一刻各单体之间的差距。如果你还没有导出日志，请看",[14,15,17],"a",{"href":16},"\u002Fguides\u002Fjk-bms-detail-log","如何导出并读懂 JK-BMS 详细日志","。",[20,21,22],"h2",{"id":22},"弱单体在日志中是什么样子",[10,24,25],{},"有三件事指向同一节单体：",[27,28,29,33,36],"ul",{},[30,31,32],"li",{},"同一个单体编号出现在大多数触发消息中，例如 \"Cell 05 over discharge protection\" 一遍又一遍。",[30,34,35],{},"快照中的最高单体或最低单体列点名了这节单体。",[30,37,38],{},"触发发生时，最高与最低单体之间的压差很大。",[10,40,41],{},"要留意编号规则。消息文本中的单体编号从 1 开始，而最高和最低单体列从 0 开始，所以列中的值 4 对应消息里的 5 号单体。快照也可能比事件滞后，所以列中的单体并不总是与消息中的单体一致。比起单独一行里的编号，更应相信压差，并且要看多次触发的规律。",[20,43,44],{"id":44},"充满端还是放空端",[10,46,47],{},"触发发生在哪一端，说明了这是什么类型的问题。",[10,49,50],{},"过压保护发生在充满端，也就是充电时。上升最快的单体最先到达限值，BMS 切断充电，而电池组的其余部分还低于限值。容量较小或内阻较高的单体会这样，因均衡器时间不够而漂移偏高的单体也会这样。",[10,52,53],{},"欠压保护发生在放空端，也就是放电时。下降最快的单体最先到达限值，BMS 切断负载，而其他单体还有电。",[10,55,56],{},"容量小或内阻大的单体，在两端都会最先到达限值。它在充满端最先触发，在放空端也最先触发。均衡漂移则不同。漂移的单体只在一端触发，通常是充满端，并且在均衡器经历几次完整充电之后，压差会缩小。容量不匹配无法靠均衡消除，因为那节单体本来就装得少。",[20,58,59],{"id":59},"分析页如何判断",[10,61,62,66],{},[14,63,65],{"href":64},"\u002Flogs","日志分析页","会按单体生成触发次数的直方图，并与每次触发时的压差对照。它采用几条固定规则：",[27,68,69,76,79,82],{},[30,70,71,72,18],{},"如果过压保护时的压差很小，请看",[14,73,75],{"href":74},"\u002Fguides\u002Fjk-bms-cell-overcharge-protection-tripping","单体过充保护为何反复触发",[30,77,78],{},"如果有一节单体占了至少 80% 的过压保护（3 次或更多），且压差中位数达到 50 mV 或更大，它会报告弱单体或不均衡单体。",[30,80,81],{},"对于欠压保护，适用同样的检验：有一节单体占至少 80% 的保护动作，且压差中位数达到 50 mV 或更大，就给出弱单体的结论。否则结论会写成电池组已放空，意思是整个电池组都放完了电，没有哪一节单体有错。",[30,83,84],{},"电压只精确到 0.1 V 的导出文件，对压差来说太粗了。过压检查会被跳过，所有欠压情况都会报告为 “电池组已放空”，所以遇到这样的文件，请谨慎对待这个结论。",[10,86,87],{},"这些阈值只是筛查工具。一条结论表示规律吻合，更换单体之前请先检查它。",[20,89,90],{"id":90},"该怎么做",[10,92,93,94,98],{},"如果触发在充满端，且那节单体漂移偏高，就从均衡入手。检查均衡起始电压和均衡触发电压，并确认充电达到起始电压的时间足够长，让均衡器有时间工作。具体数值和原因见 ",[14,95,97],{"href":96},"\u002Fguides\u002Fjk-bms-balance-settings","JK BMS 均衡设置","。然后让电池组在高电压端停留几个循环，再检查日志。如果压差缩小了，说明那是漂移。",[10,100,101,102,18],{},"如果触发在放空端，请先检查单体本身，再去动设置。比较它与其他单体的容量，并检查这节单体的采样线和连接器。线损坏或电阻值错误会给出错误的读数，见 ",[14,103,105],{"href":104},"\u002Fguides\u002Fjk-bms-wire-resistance","JK BMS 线阻",[10,107,108],{},"如果有一节单体在静置时比其他单体低 50 mV 或更多，且已经均衡过、接线良好，那它很可能确实是一节更弱的单体。请更换它，或换上一节匹配度很高的。不匹配的单体会一直限制整个电池组。",[10,110,111,112,116,117,18],{},"无论原因是什么，都请给自己留出余量。在",[14,113,115],{"href":114},"\u002F","编辑器","中设置 SOC-0% 和欠压保护，让电池组在最弱的单体到达限值之前停下，而不是刚好停在限值上。每个字段的说明见 ",[14,118,120],{"href":119},"\u002Fguides\u002Fjk-bms-parameters-explained","JK BMS 参数详解",[20,122,123],{"id":123},"用日志验证",[10,125,126,127,129],{},"打开",[14,128,65],{"href":64},"并加载详细日志。各单体的直方图显示触发在不同单体之间如何分布，点击某个柱条就能把事件筛选到那节单体。事件段表格列出每次触发的单体、开始时间、持续时间、峰值和重新触发间隔。同时附上你的 .jkcfg，页面就会把结论与你配置的阈值对照。文件始终留在你的浏览器中。",[131,132,134],"h3",{"id":133},"是我的单体坏了还是只是不均衡","是我的单体坏了，还是只是不均衡？",[10,136,137],{},"看压差和发生在哪一端。在充满端偏高、经过几次均衡充电后恢复的单体，是不均衡。静置时一直低 50 mV 或更多，或者在两端都触发的单体，更可能是弱单体。",[131,139,141],{"id":140},"为什么日志点名的单体和列中的不一样","为什么日志点名的单体和列中的不一样？",[10,143,144],{},"消息中的编号从 1 开始，而列从 0 开始，快照也可能比事件滞后。请比较多次触发，而不是只看一行。",[131,146,148],{"id":147},"为什么分析说电池组已放空而不是弱单体","为什么分析说电池组已放空，而不是弱单体？",[10,150,151],{},"没有任何一节单体占到 80% 的欠压保护，或者压差低于 50 mV，或者导出文件只有 0.1 V 精度，在这种文件里所有欠压情况都会得到这个标签。这时请自己检查各单体。",{"title":153,"searchDepth":154,"depth":154,"links":155},"",3,[156,158,159,160,161],{"id":22,"depth":157,"text":22},2,{"id":44,"depth":157,"text":44},{"id":59,"depth":157,"text":59},{"id":90,"depth":157,"text":90},{"id":123,"depth":157,"text":123,"children":162},[163,164,165],{"id":133,"depth":154,"text":134},{"id":140,"depth":154,"text":141},{"id":147,"depth":154,"text":148},"2026-10-02","在 JK BMS 详细日志中找出弱单体：哪节单体先触发、触发时压差有多大，以及这是均衡漂移还是单体已损坏。","md",[170,171,172,173,174,175],"jk bms 弱单体","jk bms 单体总是偏低","jk bms 单体不均衡","jk bms 单体欠压保护","jk bms 哪节单体坏了","jk bms 单体压差",{},true,"\u002Fguides\u002Fjk-bms-weak-cell-log",[180,181,182],"jk-bms-balance-settings","jk-bms-detail-log","jk-bms-cell-overcharge-protection-tripping",{"title":5,"description":167},"guides\u002Fjk-bms-weak-cell-log",null,"3aroKeHjBLp4bIRKZNuJLZo67cZ0XboF2BebAkpbOxE",[188,193,196,199,202,206,210,214,218,222,225,229,233,237,241,242],{"path":189,"title":190,"description":191,"date":192,"updated":185},"\u002Fguides\u002Fjk-bms-bluetooth-browser","在浏览器中通过蓝牙修改 JK BMS 设置","在 Chrome 或 Edge 中连接 JK BMS，读取全部设置，应用预设，再按安全顺序写回并逐项回读校验。无需 JK app。","2026-10-04",{"path":96,"title":194,"description":195,"date":166,"updated":192},"JK BMS 均衡设置：均衡启动电压、触发压差和均衡电流","详解 JK BMS 均衡设置：均衡启动电压、均衡触发压差、最大均衡电流和均衡开关，适用于磷酸铁锂、三元和钛酸锂。",{"path":74,"title":197,"description":198,"date":166,"updated":185},"JK BMS 单体过充保护反复触发：原因与解决方法","JK BMS 单体过充保护每分钟触发又解除？了解充电器设得过高为何导致这种情况、如何与弱单体区分，以及怎样解决。",{"path":16,"title":200,"description":201,"date":166,"updated":192},"如何导出并读懂 JK-BMS 详细日志（Detail Log）","JK-BMS 详细日志包含什么、如何从 app 导出、如何读懂其中的事件，以及日志分析页能告诉你哪些保护动作和故障信息。",{"path":203,"title":204,"description":205,"date":166,"updated":192},"\u002Fguides\u002Fjk-bms-export-import-settings","JK BMS 设置导出与导入：.jkcfg 文件完全指南","如何用 JK BMS app 导出和导入保护板设置，.jkcfg 文件里有什么，为什么手动改会损坏，以及如何在浏览器里安全编辑。",{"path":207,"title":208,"description":209,"date":166,"updated":192},"\u002Fguides\u002Fjk-bms-lifepo4-settings","磷酸铁锂 JK BMS 参数设置：8S、16S，280Ah 与 314Ah 电芯","磷酸铁锂电池组的 JK BMS 参数设置：8S 和 16S、280Ah 与 314Ah 电芯的单体电压、均衡、电流和温度推荐值，分三种损耗等级。",{"path":211,"title":212,"description":213,"date":166,"updated":185},"\u002Fguides\u002Fjk-bms-log-messages-explained","JK BMS 日志消息详解：Boot、Time calibration、保护","每条 JK BMS 日志消息的含义：Boot、Time calibration、APP open charge、保护触发与解除，以及 Discharge On Failed。",{"path":215,"title":216,"description":217,"date":166,"updated":192},"\u002Fguides\u002Fjk-bms-nmc-lto-settings","JK BMS 三元锂与钛酸锂设置：安全的单体参数","JK BMS 三元锂 NMC 与钛酸锂 LTO 电池组设置：单体过压、欠压、均衡、温度和倍率的三档数值，以及编辑器如何识别电芯类型。",{"path":219,"title":220,"description":221,"date":166,"updated":192},"\u002Fguides\u002Fjk-bms-ocp-scp-settings","JK BMS 过流保护设置：OCP 与 SCP 参数指南","详解 JK BMS 过流保护设置：充放电 OCP 电流上限、延时、恢复时间与短路保护 SCP，附推荐范围和逆变器选型方法。",{"path":119,"title":223,"description":224,"date":166,"updated":192},"JK BMS 参数详解：按分组逐项讲解每个设置","一篇看懂 JK BMS 参数：单体 OVP、OVPR、UVP、UVPR、均衡、SOC、RCV 与 RFV、电流和温度保护，附磷酸铁锂常用范围。",{"path":226,"title":227,"description":228,"date":166,"updated":192},"\u002Fguides\u002Fjk-bms-password","JK BMS 密码：默认密码、修改与重置指南","JK BMS 的密码其实有两个：蓝牙连接密码和设置密码。本文介绍出厂默认值、修改方法、密码无效时的排查，以及忘记密码怎么办。",{"path":230,"title":231,"description":232,"date":166,"updated":192},"\u002Fguides\u002Fjk-bms-reboots-power-events","JK BMS 重启与充电 MOS 关闭：在日志中读懂电源事件","JK BMS 重启，或充电 MOS 自己关闭？学会读懂详细日志中的 Boot 行和 MOS 状态，分清正常重启与真正的故障。",{"path":234,"title":235,"description":236,"date":166,"updated":192},"\u002Fguides\u002Fjk-bms-sending-failure","JK BMS 发送失败（Sending failure）：原因与逐步解决方法","JK BMS 导入设置时提示发送失败？了解固件拒绝参数的原因（电压顺序链、写入顺序、短路延时），并按步骤解决。",{"path":238,"title":239,"description":240,"date":166,"updated":192},"\u002Fguides\u002Fjk-bms-soc-calibration","JK BMS SOC 校准：解决电量漂移、跳变和复位问题","JK BMS SOC 校准详解：SOC 为什么会漂移或跳变，SOC-100% 电压和 SOC-0% 电压的作用，以及如何设置并重新校准电池组。",{"path":178,"title":5,"description":167,"date":166,"updated":185},{"path":104,"title":243,"description":244,"date":166,"updated":192},"JK BMS 线阻：均衡线阻异常报警的排查与修复","JK BMS 线阻详解：均衡线阻异常报警的含义、正常数值范围、常见原因，以及如何修好一根有问题的均衡线。",1791151319833]