Method for detecting poor contact of battery voltage testing terminals

A technology for testing terminals and poor contact, applied in the direction of measuring current/voltage, measuring electricity, measuring electrical variables, etc., it can solve the problems of not being able to collect battery voltage signals, and the contact resistance between terminals and batteries is large, and achieves good test results. Short test time and easy-to-achieve results

Active Publication Date: 2010-05-26
GUANGZHOU BLUE KEY ELECTRICS IND CO LTD
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AI Technical Summary

Problems solved by technology

[0002] At present, in the battery test technology, the four-wire test method in which the voltage test terminal and the current test terminal are separated is generally used. The advantage of using the four-wire test method is that the battery voltage value can be accurately tested, but when the voltage test terminal and the battery ...

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  • Method for detecting poor contact of battery voltage testing terminals
  • Method for detecting poor contact of battery voltage testing terminals
  • Method for detecting poor contact of battery voltage testing terminals

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Embodiment Construction

[0018] The present invention will be further elaborated below in conjunction with the accompanying drawings.

[0019] Such as figure 1 As shown, the principle of the method for detecting poor contact of battery voltage test terminals in the present invention is: since the battery is a voltage source with very small internal resistance, flowing a small current in a short time will not cause voltage fluctuations at both ends of the battery, so it can Add a test circuit that can control on-off, inject a small current into the battery through the battery voltage test line, and then measure and compare the voltage at both ends of the positive and negative voltage test lines before and after the current is on and off. If the voltage input value before and after the current on-off If there is no change, it indicates that the voltage terminal is in good contact. If the voltage changes significantly, it indicates that there is a large contact resistance between the voltage test termina...

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Abstract

The invention discloses a method for detecting poor contact of battery voltage testing terminals, in particular to a technology for detecting the poor contact of voltage testing terminals, which is suitable for a rechargeable battery. Two ends of a voltage sampling circuit are connected with a test circuit capable of controlling on-off, and micro current is injected into the battery through a voltage test line of the battery; and then the voltage values of both ends of the anode and cathode of a voltage test line are respectively measured under the states of current switching on-off, no change of the voltage value shows good contact of voltage terminals, and the change of the voltage value shows that the voltage test terminals and the battery have contact resistance, i.e. the voltage test terminals have poor contact. The invention has good test effect, can easily detect the contact situation of the voltage test terminals, and can calculate the value of the contact resistance; and in addition, the method has small test current and short test time, and has no influence on the normal detection of the battery; and the test circuit for the method has simple principles and is easily realized.

Description

technical field [0001] The invention relates to a method for poor contact of a battery voltage test terminal, in particular to a technique suitable for detecting poor contact of a voltage test terminal of a rechargeable battery such as a nickel-cadmium battery, a nickel-hydrogen battery or a lithium-ion battery. Background technique [0002] At present, in the battery test technology, the four-wire test method in which the voltage test terminal and the current test terminal are separated is generally used for testing. The advantage of using the four-wire test method is that the battery voltage value can be accurately tested. When the contact is poor, there will be a large contact impedance between the terminal and the battery. Since the voltage sampling circuit has a certain input resistance and input current, there will be a voltage drop on the contact resistance, resulting in inaccurate acquisition of the voltage sampling circuit. battery voltage signal. Contents of the ...

Claims

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Application Information

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IPC IPC(8): G01R19/10G01R31/36
Inventor 余荣锋马汉文王伟健
Owner GUANGZHOU BLUE KEY ELECTRICS IND CO LTD
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