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Battery internal short circuit test device and trigger method

A test device and battery-in-cell technology, applied in the direction of measuring device, measuring electricity, measuring electrical variables, etc., can solve the problems of battery damage, inability to simulate the short-circuit state in the battery, damage to the battery integrity, etc., so as to reduce the impact and prevent The effect of overall warming, convenience and easy operation

Active Publication Date: 2014-09-24
BEIJING KEY POWER TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The internal short circuit test methods in many standards, such as extrusion, acupuncture, external short circuit, etc., will destroy the integrity of the battery during the test and cause serious damage to the battery, which is fundamentally different from the internal short circuit that occurs during actual use. The difference, can not really simulate the internal short circuit state of the battery
Therefore, the main difficulty in today's internal short circuit testing and research is to find a suitable method to trigger internal short circuit

Method used

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  • Battery internal short circuit test device and trigger method
  • Battery internal short circuit test device and trigger method
  • Battery internal short circuit test device and trigger method

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Embodiment Construction

[0023] Please also refer to figure 1 and figure 2 , the first embodiment of the present invention provides a method for triggering a short circuit in a battery, comprising: performing fixed-point local heating on the battery 100 outside the battery 100 to melt part of the diaphragm 130 of the battery 100 to form a diaphragm gap 132, thereby The positive electrode material and the negative electrode material of the battery 100 are directly contacted at the gap 132 of the separator, and an internal short circuit occurs.

[0024] The battery 100 is a stacked battery or a wound battery. The battery 100 includes a positive electrode plate 110 , a positive electrode material layer 120 , a separator 130 , a negative electrode material layer 140 and a negative electrode plate 150 . The positive electrode plate 110 , the positive electrode material layer 120 , the separator 130 , the negative electrode material layer 140 and the negative electrode plate 150 are stacked in sequence. ...

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Abstract

A battery internal short circuit test device comprises a battery, at least one deformation component and a heating device. The deformation component is arranged inside the battery and comprises at least one deformation portion, wherein the deformation portion has at least one tip end. The deformation component has a trigger temperature, and when the temperature of the deformation component is equal to or higher than the trigger temperature, the deformation portion deforms to the direction where a diaphragm of the battery locates and the at least one tip end is allowed to pierce through the diaphragm, and thus the battery internal short circuit is triggered. The heating device is arranged outside the battery at the position corresponding to the deformation component. The heating device is used for carrying out fixed point local heating on the battery to enable the temperature of the deformation component to reach the trigger temperature. The invention also provides a trigger method of the battery internal short circuit.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a test device and a triggering method for a battery internal short circuit. Background technique [0002] Under the dual pressure of energy crisis and environmental pollution, electrification of vehicle power system has gradually become the mainstream of future vehicle technology development. Lithium-ion batteries are one of the main choices for the power source of electric vehicles due to their advantages in energy density and cycle life. However, safety accidents of lithium-ion power batteries occur occasionally, and the safety problems of lithium-ion power batteries will threaten the safety of people's lives and property, and hinder the large-scale industrialization of electric vehicles. [0003] Most safety issues of lithium-ion power batteries can be controlled or mitigated through external measures such as electrical management or temperature management. Mos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
Inventor 张明轩欧阳明高卢兰光
Owner BEIJING KEY POWER TECH
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