Method for lowering influence of reverse current on battery voltage-resistant insulation test

A technology of withstand voltage insulation and reverse current, which is applied in the direction of measuring electricity, measuring devices, and measuring electrical variables, etc. It can solve problems affecting the judgment of the output voltage of the tester, battery discharge, and the judgment results of the withstand voltage insulation test, etc., to increase the number , reduce the defective rate, improve the effect of accuracy

Active Publication Date: 2016-05-04
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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Problems solved by technology

[0002] As a test method, the withstand voltage insulation test has been widely used in the insulation internal resistance test of the battery semi-finished products after welding and forming. Since the battery is basically a pure capacitive load before liquid injection, it will cause the internal resistance of the battery during the withstand voltage insulation test. The voltage is greater than the output voltage of the tester in an instant, which will cause the battery to discharge and generate reverse current, which will affect the judgment of the output voltage of the tester, thereby affecting the judgment result of the withstand voltage insulation test

Method used

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  • Method for lowering influence of reverse current on battery voltage-resistant insulation test

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Embodiment 1

[0013] Embodiment 1: A method for reducing the impact of backflow current on the battery withstand voltage insulation test, comprising the following steps:

[0014] (1) Select 1,000 batteries to be tested with a nominal capacity of 13Ah, and form them by laser welding;

[0015] (2) Under the test voltage of 75V, carry out the withstand voltage insulation test, and the test time is 3s;

[0016] (3) Use 190MΩ as the qualified standard for the insulation internal resistance value to determine the withstand voltage insulation test results.

Embodiment 2

[0017] Embodiment 2: A method for reducing the influence of backflow current on battery withstand voltage insulation test, comprising the following steps:

[0018] (1) Select 1,000 batteries to be tested with a nominal capacity of 22Ah, and form them by laser welding;

[0019] (2) Under the test voltage of 250V, carry out the withstand voltage insulation test, and the test time is 10s;

[0020] (3) Use 300MΩ as the qualified standard for the insulation internal resistance value to determine the withstand voltage insulation test results.

Embodiment 3

[0021] Embodiment 3: A method for reducing the influence of reverse flow current on battery withstand voltage insulation test, comprising the following steps:

[0022] (1) Select 1,000 batteries to be tested with a nominal capacity of 20Ah, and form them by laser welding;

[0023] (2) Under the test voltage of 300V, carry out the withstand voltage insulation test, and the test time is 6s;

[0024] (3) Use 250MΩ as the qualified standard for the insulation internal resistance value to determine the withstand voltage insulation test results.

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Abstract

The invention provides a method for lowering the influence of reverse current on a battery voltage-resistant insulation test. The method includes the steps that test voltage, test time and insulation-resistance resistance valve qualified standards of the voltage-resistant insulation test are determined according to the nominal capacity of a battery to be tested, and the battery to be tested is the battery which is welded but not subjected to electrolyte injection; the voltage-resistant insulation test is conducted on the battery to be tested by the adoption of the determined test voltage in the determined test time; the result of the voltage-resistant insulation test of the battery to be tested is evaluated according to the determined insulation-resistance resistance valve qualified standard. According to the method, different test voltage, test time and insulation-resistance resistance valve qualified standards are set at the voltage-resistant insulation test stage targeted to batteries to be tested of different nominal capacities, and the influence of the reverse current on the battery voltage-resistant insulation test can be effectively shielded, so that test accuracy is improved, the number of qualified batteries is increased, and the reject ratio is lowered.

Description

technical field [0001] The invention relates to the technical field of battery withstand voltage insulation testing, in particular to a method for reducing the influence of backflow current on battery withstand voltage insulation testing. Background technique [0002] As a test method, the withstand voltage insulation test has been widely used in the insulation internal resistance test of the battery semi-finished products after welding and forming. Since the battery is basically a pure capacitive load before liquid injection, it will cause the internal resistance of the battery during the withstand voltage insulation test. The voltage is greater than the output voltage of the tester in an instant, causing the battery to discharge, generating a backflow current, which affects the judgment of the output voltage of the tester, thereby affecting the judgment result of the withstand voltage insulation test. Contents of the invention [0003] The purpose of the present inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/385
Inventor 杨乃昆宫璐
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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