Effect of internal resistance difference on safety performance of lithium-ion battery pack

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Effect of internal resistance difference on safety performance of lithium-ion battery pack

更新时间：2025-12-10

- Effect of internal resistance difference on safety performance of lithium-ion battery pack
- CIESC Journal Issue 11, (2010)
- 作者机构：
  
  天津力神电池股份有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 November 2010，
  
  Published：05 November 2010
- 稿件说明：
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于申军. Effect of internal resistance difference on safety performance of lithium-ion battery pack[J]. CIESC Journal, 2010, (11).
DOI：

于申军. Effect of internal resistance difference on safety performance of lithium-ion battery pack[J]. CIESC Journal, 2010, (11). DOI：

摘要

研究了内阻差异对不同连接方式锂离子电池组安全性能的影响。测试结果表明，随着循环次数的增多，内阻差异电池的内阻值逐渐增大，壳体温度逐渐升高，放电容量不断衰减，进而导致阻值差异性不断增大，最终该电池发生失效。失效原因是内阻值不同所导致的该单电池发生的过充电现象。研究表明，内阻差异性是影响电池组安全性能的重要因素。与其他单电池相比，电池组中内阻差异越大的单电池的安全性能越差，连接方式中并联方式的安全性能要好于串联方式。

Abstract

Effect of internal resistance difference (IRD) on the safety performance of lithium-ion battery pack with different attended modes was investigated. The testing indicated that with increase of cycle times

for cell with IRD its internal resistance and housing temperature increased gradually and the discharge capacity decreased unceasingly

leading to continuous enlargement of IRD and the failure of the cell at last. These results indicated that IRD is an important factor affecting the safety performance for lithium-ion battery pack. Compared with normal cell

for a cell pack

the bigger the IRD the worse the safety performance. The safety performance is better for the pack with parallel connection than for that with series connection.

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