课件：电池失效分析.ppt

4/7/2019,Lishen Battery Joint-Stock Co., Ltd. Propriety Confidential Attorney Client Privileged Communication,1,电池失效分析,Dec. 2008,Tianjin Lishen Battery Joint-stock Co., Ltd,4/7/2019,Lishen Battery Joint-Stock Co., Ltd. Propriety Confidential Attorney Client Privileged Communication,2,目录 一: 8D分析方法 二:锂离子电池常见失效模式 三:关键控制参数 四:失效模式分析 五:与安全相关的要求,4/7/2019,Lishen Battery Joint-Stock Co., Ltd. Propriety Confidential Attorney Client Privileged Communication,3,一: 8D分析方法,1. 主题 -Concern Title 小组建立 -Team Cross function 问题描述 -Problem description Whats wrong with what? 4. 临时措施 -Containment action Emergency response action to protect customer 措施验证 -Verification of containment action prove your containment action is effective. 6. 原因分析 -Root cause analysis 3why Fishbone 重现性实验 -simulation testing to recur the defects 改善措施 -Permanent Corrective Action 改善效果验证 -Verification of Corrective Action Effectiveness 10. 防止再次发生 -Actions Taken to Prevent Recurrence Document (Dfmea/Pfmea CP WI) 11. 庆祝 -Congratulation,4/7/2019,Lishen Battery Joint-Stock Co., Ltd. Propriety Confidential Attorney Client Privileged Communication,4,二.锂离子电池常见失效模式,电池失效,电压低,内阻大,容量低,安全,漏液,其他,循环差,鼓胀(方/聚),自放电 负载漏电流 短路 充电不足 -,焊接 导电剂 接触(腐蚀) 电液 -,涂敷量 温度 电阻 -,过充 短路 过热 挤压 -,焊接 注液孔 密封件 -,焊接 注液孔 密封件 -,受热 气胀 循环 -,电液 电极 温度 循环条件 -,-,4/7/2019,Lishen Battery Joint-Stock Co., Ltd. Propriety Confidential Attorney Client Privileged Communication,5,三: 关键控制参数,粉浆,材料,配比,黏度,固含量,除铁,涂敷,涂敷量,颗粒度,速度,温度,间隔,长度,对齐度,涂敷突起,基体,碾压,碾压密度,平整度,厚度,反弹率,剪切,毛刺, 收卷对齐度,宽度,电极制造:,Lamination: 覆盖涂敷宽度,4/7/2019,Lishen Battery Joint-Stock Co., Ltd. Propriety Confidential Attorney Client Privileged Communication,6,三: 关键控制参数,极片烘干,温度,气压,时间,极片反弹,极耳焊接,焊接拉力,极耳胶带,卷绕,对齐度,毛刺,张力,粉尘,极片插入/收尾位置,掉粉,极组卷绕:,4/7/2019,Lishen Battery Joint-Stock Co., Ltd. Propriety Confidential Attorney Client Privileged Communication,7,三: 关键控制参数,压极组,压力,温度,时间,均一性,极组厚度,异物,包胶带,胶带长度,胶带性能,入壳,极组入壳比,入壳挫伤,极耳焊接,拉力,位置,虚焊,异物,装配工序:,4/7/2019,Lishen Battery Joint-Stock Co., Ltd. Propriety Confidential Attorney Client Privileged Communication,8,三: 关键控制参数,弯极耳,间距,角度,形状,扣盖,极耳变形,上垫片挤压,离心入壳,极耳变形,角度,周边焊接,隔膜烫伤,焊接强度,焊接裂缝,异物,装配工序:,4/7/2019,Lishen Battery Joint-Stock Co., Ltd. Propriety Confidential Attorney Client Privileged Communication,9,三: 关键控制参数,烘极组,时间,温度,气压,水份含量,隔膜状态,注液,温度,湿度,注液量,静置时间,预化成,电流,电压,时间,封球,球径,压力,球材质,装配工序:,4/7/2019,Lishen Battery Joint-Stock Co., Ltd. Propriety Confidential Attorney Client Privileged Communication,10,三: 关键控制参数,化成,电流,电压,时间,老化,温度,静置时间,后处理,筛选电压,电流,电压,温度,设备精度,分选,短路,厚度,富裕量(Margin),化成/后处理工序:,4/7/2019,Lishen Battery Joint-Stock Co., Ltd. Propriety Confidential Attorney Client Privileged Communication,11,三: 关键控制参数,焊接,电流, 时间,夹具,PTC,关断温度,结构强度,PCM,性能,焊接,触点,注塑,温度,溢胶,少胶,Pack:,贴纸,外观,水贴纸,安全阀变形,4/7/2019,Lishen Battery Joint-Stock Co., Ltd. Propriety Confidential Attorney Client Privileged Communication,12,四: 失效模式分析,低电压: 1.自放电 2.负载放电 3.充电不足 4.接触不良 可能的原因:,4/7/2019,Lishen Battery Joint-Stock Co., Ltd. Propriety Confidential Attorney Client Privileged Communication,13,四: 失效模式分析,高内阻: 1.焊接不良 2.过放电 3.外短路(受热) 4.接触不良 可能的原因:,4/7/2019,Lishen Battery Joint-Stock Co., Ltd. Propriety Confidential Attorney Client Privileged Communication,14,四: 失效模式分析,安全 1.内短路 2.过充电 3.热冲击 4.充电时接电话 可能的原因:,4/7/2019,Lishen Battery Joint-Stock Co., Ltd. Propriety Confidential Attorney Client Privileged Communication,15,五: 与安全相关的要求,安全 安全规则更新,基于对安全的了解深入，我们对电池的安全设计准则进行了更新,主要突出了以下几点: 1. 电极以单面涂敷量进行控制(真实的N/P比) 2. 电液水份的控制，特别是注液后水份的规格 3. 铝箔与负极活性物质之间的绝缘要求 4. 毛刺规格 5. 安全阀的有效性 6. 对新的行业标准的符合性,Cathode Sep Anode,后面内容直接删