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Test device for short circuit in battery and triggering method

A testing device, a technology in the battery, applied in the direction of measuring devices, circuits, secondary batteries, etc., can solve the problems of battery damage, inability to simulate the short-circuit state in the battery, and damage to the integrity of the battery.

Active Publication Date: 2014-10-01
BEIJING KEY POWER TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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  • Test device for short circuit in battery and triggering method
  • Test device for short circuit in battery and triggering method
  • Test device for short circuit in battery and triggering method

Examples

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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

The invention relates to a test device for short circuit in a battery. The test device comprises a battery and at least one deformation element which is arranged in the battery, wherein the deformation element comprises at least one deformation part, the deformation part is provided with at least one sharp end, the deformation element has a trigger temperature, and when the temperature of the deformation element is equal to or higher than the trigger temperature, the deformation part is deformed towards the direction in which a diaphragm of the battery is arranged, and the sharp end of the deformation part pierces the diaphragm, so that the short circuit in the battery is caused. The invention further provides a triggering method of the short circuit in the battery.

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 of lithium-ion power batteries has become one of the problems that threaten the lives and property of the people 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 ...

Claims

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Application Information

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IPC IPC(8): H01M10/48
CPCG01R31/385
Inventor 张明轩欧阳明高卢兰光
Owner BEIJING KEY POWER TECH
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