Lithium-ion battery cell life detection model

Abstract

The invention provides a lithium-ion battery cell life detection model, wherein the standard part information input module is used to receive the capacity, charging DC internal resistance and discharging DC internal resistance of the standard part of the lithium-ion battery cell measured at a specific ambient temperature value information and the life curve of standard parts of lithium-ion battery cells; the information input module of the tested parts is used to receive and pre-process the measured capacity, charging DC internal resistance, and discharging DC Internal resistance information; the information calculation unit receives information from the standard part information input module and the tested part information input module, and calculates the lithium ion battery cell standard part and the lithium ion battery cell tested part according to the received information. The life curve of the ion battery cell under test; the information calculation unit outputs the calculation results and battery information of the standard lithium ion battery cell and the life curve of the lithium ion battery cell under test to the information output unit.

Description

technical field [0001] The invention relates to the technical field of application of new energy vehicle power supplies, in particular to a life detection model of a lithium-ion battery cell. Background technique [0002] The application of lithium-ion batteries in new energy vehicle power supplies is very important. The service life of new energy vehicle power supplies is always the focus of consumers. Therefore, the life of lithium-ion battery cells has become a key factor for designers in the new product design of new energy vehicles. one of the key indicators. In a short cycle, it is very important for the development of new energy vehicles to obtain relatively accurate cycle life characteristics of the lithium-ion batteries used. Since the lithium-ion battery cell has the characteristics of small charge and discharge current, low heat generation, and long cycle life, the cell life curve calculation method is widely used at present. This method is to first test the lif...

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Problems solved by technology

[0004] The Chinese patent application publication number is CN201710238631.0, and the utility model patent with the application publication date of April 13, 2017 discloses a method and system for detecting the cycle life of lithium-ion batteries. The lithium-ion batteries of this method are tested by high-current life It is equivalent to its life at a low current, but it is still necessary to perform a high-current life test on the battery. The test cycle is long, and it is not universal for lithium-ion battery cells with high specific energy and high power functions of the same system and structure. The application range is relatively large. Small

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