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Lithium ion battery fault simulation device and method based on gas signal monitoring

A fault simulation device, lithium-ion battery technology, applied in the direction of measuring devices, measuring electricity, secondary batteries, etc., can solve the problems of lack of characteristic signals and simulation methods, and achieve the effects of strong repeatability, simple operation, and improved sensitivity

Active Publication Date: 2021-07-23
JIANGSU ELECTRIC POWER CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Sudden failure is also a type of failure that is easily encountered during the working process of lithium-ion batteries. Due to the lack of characteristic signals and simulation methods that can characterize sudden failures of lithium-ion batteries, there are few simulations for sudden failures of lithium-ion batteries. Research and corresponding simulation methods proposed

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  • Lithium ion battery fault simulation device and method based on gas signal monitoring
  • Lithium ion battery fault simulation device and method based on gas signal monitoring

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Experimental program
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example 3

[0052] Step 2: Carry out fault simulation on the lithium-ion battery. The lithium-ion battery faults that can be realized by this device include but are not limited to the following three types. The implementation methods of the example three types of faults are as follows:

[0053] Step 201: Use the battery test system 3 to simulate the overcharge of the lithium-ion battery. The selection of the overcharge current is consistent with the normal cycle simulation. The 3A constant current is used for charging, and the normal charging cut-off voltage is set according to 1.5 times the normal charging voltage. That is, 1.5 times of the nominal charge cut-off voltage of the sample battery. The overcharge fault test of the lithium ion battery is carried out, and the lithium ion battery is placed in the high and low temperature control box 4 during the overcharge process.

[0054] Step 202: Simulate the short-circuit fault of the lithium-ion battery using the acupuncture and extrusion ...

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Abstract

The invention discloses a lithium ion battery fault simulation device and method based on gas signal monitoring. The device comprises a thermocouple, a plurality of lithium ion batteries, a battery test system, a high-low temperature control box, a needling extrusion module, a gas monitoring system and an upper computer. According to the simulation device disclosed by the invention, the simulation of overcharge, overdischarge, short circuit, high temperature and low temperature faults can be realized, gas signals released by the lithium ion battery when the faults occur can be monitored in real time, and the gas type and concentration change can be analyzed through the computer. According to the invention, a complex software control system is not needed, the connection method among the equipment is simple, and the simulation devices are conventional equipment and modules.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a lithium-ion battery fault simulation device and method based on gas signal monitoring. Background technique [0002] The rapid development of new energy has the characteristics of intermittent and volatility, which leads to the disadvantage of unstable power generation in new energy power sources. Energy storage power station can be combined with new energy power generation, which is an effective way to solve the problem of new energy power generation. Among many batteries, lithium batteries are widely used because of their high specific energy, high specific power, and moderate cost. However, during the application process, the problem of poor safety performance of lithium batteries has been exposed, and explosion behaviors characterized by thermal runaway occur from time to time. [0003] By simulating typical faults of lithium-ion batteries, diffe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42G01R31/382
CPCH01M10/4285H01M10/4207G01R31/382Y02E60/10
Inventor 李晨姜兵夏伟栋马宏忠彭晓晗丁宁李祥徐杰许洪华杨启帆刘宝稳
Owner JIANGSU ELECTRIC POWER CO