Method for accurately measuring health degree of battery

A measurement method and technology of health, applied in the field of accurate measurement of battery health, can solve problems such as complex mathematical models, complex battery models, and various types of batteries, so as to achieve easy data acquisition, accurate and practical calculations, and improve user experience Effect

Pending Publication Date: 2022-01-14
威胜能源技术股份有限公司
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Problems solved by technology

[0002] With the increasing number of new energy sources and electric vehicles, people's demand for the use of electric vehicle batteries is also increasing. At present, the battery health in the charging and changing cabinet is based on the built-in power gauge on the BMS board or the current sampled by the MCU. The integral calculation of time is combined with the SOC calculation of the battery state of charge, but because the battery model is very complex, there are many types of batteries, and there are many nonlinear parameters, the discharge curve is greatly affected by temperature, load, etc.; and in the use of products During the process, the load conditions in different scenarios are more complex, and some systems have rapid current changes, current spikes, and a relatively wide range of current changes. This calculation method has the disadvantages of complex mathematical models and poor accuracy.

Method used

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  • Method for accurately measuring health degree of battery
  • Method for accurately measuring health degree of battery
  • Method for accurately measuring health degree of battery

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Embodiment 1

[0033] A method for accurately measuring battery health, characterized in that it mainly includes the following steps:

[0034]S1: When the battery is separated from the charging / replacing cabinet, start the recording device inside the battery to record battery parameters such as SOC, current, temperature, etc., and the operating status of the electric vehicle to obtain a data set; The device sends the collected voltage, current, temperature and battery charge state to the flash for recording and storage through the on-board communication; the recording time is not less than 5s, and the recording frequency is 1s / bar.

[0035] S2: When the battery is used up and put into the charging / replacing cabinet again and communication is established, the battery stops recording and uploads the data set recorded by the recording device;

[0036] S3: What disassembles the data set recorded in S2 into the following seven types of data:

[0037] 1) One type of data: the start value CH and s...

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Abstract

The invention discloses a method for accurately measuring the health degree of a battery. The method is characterized in that data recording is performed on the parameters of a battery in use, data disassembly is performed on the parameters, a dynamic current discharge model is established, and a conventional SOH value measuring and calculating method is broken through, so that the calculation of the health degree of the battery is more accurate and practical; and a main control board charges or disables the battery according to the SOH1 value obtained through detection, screens out the unqualified SOH value in time, and recovers, so that the user experience is improved.

Description

technical field [0001] The invention relates to the technical field of battery charging and battery replacement, in particular to a method for accurately measuring battery health. Background technique [0002] With the increasing number of new energy and electric vehicles, people's demand for the use of electric vehicle batteries is also increasing. At present, the battery health in the charging and changing cabinet is based on the built-in power gauge on the BMS board or the current sampled by the MCU. The integral calculation of time is combined with the SOC calculation of the battery state of charge, but because the battery model is very complex, there are many types of cells, and there are many nonlinear parameters, the discharge curve is greatly affected by temperature, load, etc.; and in the use of products During the process, the load conditions in different scenarios are more complicated, and some systems have rapid current changes, current spikes, and a relatively w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/392
CPCG01R31/392Y02T90/167Y04S30/12
Inventor 冯涛邱思彬王武李艳华雷龙喜杨俊常小波邓超艳
Owner 威胜能源技术股份有限公司
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