We do a new Li-ion battery evaluation research on the effects of cell resistance and polariza- tion on the energy loss in batteries based on thermal property and heat generation behavior of battery. Series of 18650 ce...We do a new Li-ion battery evaluation research on the effects of cell resistance and polariza- tion on the energy loss in batteries based on thermal property and heat generation behavior of battery. Series of 18650 cells with different capacities and electrode materials are evalu- ated by measuring input and output energy which change with charge-discharge time and current. Based on the results of these tests, we build a model of energy loss in cells＇ charge- discharge process, which include Joule heat and polarization heat impact factors. It was reported that Joule heat was caused by cell resistance, which included De-resistance and reaction resistance, and reaction resistance could not be easily obtained through routine test method. Using this new method, we can get the total resistance R and the polarization parameter U. The relationship between R, η, and temperature is also investigated in order to build a general model for series of different Li-ion batteries, and the research can be used in the performance evaluation, state of charge prediction and the measuring of consistency of the batteries.展开更多
1、引言随着电池的应用越来越多,对电池管理技术的要求也逐步提高,目前主要是通过专用的集成电路对电池进行管理。高端应用的多采用带有SOC（State Of Charge）功能的集成电路,可以获取电池的容量信息,但是成本相对较高,在对成本敏感的...1、引言随着电池的应用越来越多,对电池管理技术的要求也逐步提高,目前主要是通过专用的集成电路对电池进行管理。高端应用的多采用带有SOC（State Of Charge）功能的集成电路,可以获取电池的容量信息,但是成本相对较高,在对成本敏感的应用领域会受到一定的限制;中低端的应用只有简单的充放电管理。展开更多
文摘We do a new Li-ion battery evaluation research on the effects of cell resistance and polariza- tion on the energy loss in batteries based on thermal property and heat generation behavior of battery. Series of 18650 cells with different capacities and electrode materials are evalu- ated by measuring input and output energy which change with charge-discharge time and current. Based on the results of these tests, we build a model of energy loss in cells＇ charge- discharge process, which include Joule heat and polarization heat impact factors. It was reported that Joule heat was caused by cell resistance, which included De-resistance and reaction resistance, and reaction resistance could not be easily obtained through routine test method. Using this new method, we can get the total resistance R and the polarization parameter U. The relationship between R, η, and temperature is also investigated in order to build a general model for series of different Li-ion batteries, and the research can be used in the performance evaluation, state of charge prediction and the measuring of consistency of the batteries.
文摘1、引言随着电池的应用越来越多,对电池管理技术的要求也逐步提高,目前主要是通过专用的集成电路对电池进行管理。高端应用的多采用带有SOC（State Of Charge）功能的集成电路,可以获取电池的容量信息,但是成本相对较高,在对成本敏感的应用领域会受到一定的限制;中低端的应用只有简单的充放电管理。
