Battery pulse heating parameter determination method and parameter determination system

A technology of pulse heating and parameter determination, which is applied in the direction of batteries, battery electrodes, secondary batteries, etc.

Active Publication Date: 2019-12-10
北京昇科能源科技有限责任公司
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  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to understand the internal changes of the battery during the internal heating of the battery by the pulse current, so as to ensure that the pulse heating parameters do not have a large impact on the battery life, and provide a battery pulse heating parameter determination method and parameter determination system

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  • Battery pulse heating parameter determination method and parameter determination system
  • Battery pulse heating parameter determination method and parameter determination system
  • Battery pulse heating parameter determination method and parameter determination system

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[0040] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0041] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to"...

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Abstract

The invention relates to a battery pulse heating parameter determination method and a parameter determination system. The negative reference potential of a lithium ion battery is obtained in real timein the positive and negative pulse heating process under various heating parameters, wherein the negative reference potential is the voltage difference between the negative electrode of the lithium ion battery and a reference electrode. Whether a lithium precipitation phenomenon occurs in the lithium ion battery or not is judged by judging the relationship between the negative reference potentialand a threshold potential. Due to lithium precipitation, the available capacity of the battery may be reduced, dendrites may pierce a diaphragm to cause short circuit in the battery and induce thermal runaway of the battery and the like, and performance reduction, safety risk and other hazards may be caused. Therefore, when the negative reference potential is smaller than the threshold potential,a first heating parameter needs to be adjusted, in order to avoid lithium precipitation and prolong the service life of the battery. By recording the heating parameter when the negative reference potential is greater than the threshold potential, it can be ensured that the pulse heating parameter will not greatly influence the service life of the battery.

Description

technical field [0001] The present application relates to the technical field of battery management, in particular to a method and system for determining battery pulse heating parameters. Background technique [0002] With the widespread application of lithium-ion battery vehicles, especially pure electric vehicles, the performance of vehicles will be closely dependent on the performance of lithium-ion power batteries. Scenarios of low-temperature charging are also appearing more frequently. The problems faced by lithium-ion batteries at low temperatures have had a huge impact on their practical applications. The low temperature environment will reduce the available energy of the battery and cause energy loss during discharge, which will also lead to the attenuation of battery life throughout the life cycle. At the same time, the low temperature environment will also increase the impedance of the battery, thereby affecting battery life and safety. These problems have brou...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/615H01M10/625H01M10/637G01R31/385G01R31/392
CPCH01M10/615H01M10/625H01M10/637G01R31/385G01R31/392H01M10/48H01M10/486H01M10/633H01M10/443H01M10/0525H01M2220/20B60L58/27B60L58/25B60L2240/545B60L2240/549Y02E60/10H01M10/63H01M10/657H01M4/405
Inventor 秦宇迪卢兰光褚政宇刘金海欧阳明高李建秋
Owner 北京昇科能源科技有限责任公司
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