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Method for monitoring deformation (bulge) of power battery of new energy automobile

A power battery and deformation technology, which is applied to electrochemical generators, secondary batteries, circuits, etc., can solve problems such as fire or explosion accidents, no indication of sensor detection signals, lack of monitoring of power battery single deformation, etc.

Inactive Publication Date: 2021-12-28
胡定灏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The content described in the Chinese patent "Battery Bulge Detection Sensor" does not explain the principle of the sensor used to detect the signal generated by the battery bulge, which has certain limitations.
[0003] The new energy vehicle power battery management system monitors safety data such as overvoltage, undervoltage, overcurrent, overtemperature, and insulation for each single power battery in the entire power battery combination. lack of monitoring
The consequences of the deformation (bulge) of the power battery can be large or small, ranging from causing a drop in the energy storage of a single power battery and affecting the use of the entire battery pack, to serious fire or explosion accidents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Example 1 The zigzagging strip-shaped sensitive grid of the copper foil resistance strain gauge is flatly pasted on the external surface of the monitored single power battery with a double-sided adhesive film or paper substrate, and the input end of the copper foil resistance strain gauge passes through the The line is connected to the power battery pack management system, and the power battery pack management system outputs a DC voltage of 5 volts to the input end of the copper foil resistance strain gauge. When deformed (bulging), this force makes the zigzag strip-shaped sensitive grid pasted on the outer surface of the single power battery narrow and elongated, and its terminal resistance becomes larger, that is, the voltage at the output terminal decreases, and the output terminal passes through The line is connected to the power battery management system, and the power battery management system can determine that the monitored power battery unit is deformed (bulging...

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PUM

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Abstract

The invention provides a method for monitoring deformation (bulge) of a power battery of a new energy automobile. A resistance strain gauge is adhered to an external surface of a monitored single power battery, and according to a strain effect principle that the end resistance value of the resistance strain gauge changes correspondingly when the resistance strain gauge generates mechanical deformation under the action of external force, when the monitored single power battery is deformed (bulged), the resistance strain gauge adhered to the external surface of the monitored single power battery is mechanically deformed under the action of mechanical force, the end resistance value of the resistance strain gauge is changed in the process, and the input voltage applied to one end of the resistance strain gauge is constant voltage; and the output voltage of the other end changes along with the change of the resistance value, and the changed voltage is transmitted to a power battery pack management system (BMS) through a line, so that early warning is generated, faults are determined in time, and hidden dangers are eliminated.

Description

technical field [0001] The present invention relates to the management of power batteries of new energy vehicles, in particular to a method for monitoring the deformation (bulging) of power batteries of new energy vehicles Background technique [0002] The power battery pack of a new energy vehicle is composed of several power battery cells. After the continuous charging and discharging process, individual cells in the power battery pack will have a phenomenon of power imbalance, which will cause individual batteries to be overcharged or overcharged. According to the structural characteristics and chemical characteristics of the power battery, overcharging will cause the positive electrode ions to run into the negative electrode material, and the original full grid of the positive electrode will deform and collapse. However, there are more and more ions in the negative electrode, and the excessive accumulation makes the ions grow into tree-like crystals, which destroys the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16H01M10/48
CPCG01B7/18H01M10/48Y02E60/10
Inventor 胡定灏
Owner 胡定灏
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