内阻不平衡对铅酸蓄电池组温度场影响研究

Influence of internal resistance inbalance on temperature field of VRLAbatteries

针对阀控式铅酸蓄电池组因内阻不平衡出现温升的现象,搭建了三维蓄电池组仿真模型。分别研究了热老化和生产工艺问题所引起的内阻不平衡,仿真分析了对应情况的温度分布。建立了蓄电池放电试验平台,利用红外成像仪得到了实际温度分布,并与仿真结果进行了对比。研究结果表明电池内阻不平衡会导致其温度明显上升。其中,因热老化导致的内阻增大会使电池最高温度上升至30.4℃,而因工艺问题导致的内阻增大会使电池组局部严重过热,最高温度可达32.5℃。红外试验也出现了内阻增大会导致温度显著上升的现象。

For the temperature rise phenomenon of VRLA batteries due to internal resistance imbalance,a threedimensional simulation model of VRLA batteries was built.The resistance imbalances caused by thermal aging and production process problems were studied,and the corresponding temperature distribution was analyzed.The battery discharge test platform was established.The actual temperature distribution was obtained by using the infrared imager and was compared with the simulation results.The results show that the internal resistance imbalance of the battery will lead to the significant increase of its temperature.The increase of internal resistance caused by thermal aging makes the maximum temperature of the battery rise to 30.4℃,while the increase of internal resistance caused by process problems causes serious local overheating with the maximum temperature of 32.5℃.It’s also found that the temperature will rise significantly with the increase of internal resistance in the infrared test.