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Electricity-taking method and device for detecting battery internal resistance

A technology of battery internal resistance and detection circuit, applied in the direction of measurement device, measurement of resistance/reactance/impedance, measurement of electricity, etc., can solve problems such as affecting detection accuracy, and achieve the effect of high common mode rejection ratio

Active Publication Date: 2011-09-07
SHENZHEN HEADSUN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The common mode signal in the AC input in the above method 1 will be transmitted to the power output, directly affecting the detection accuracy; the AC / DC converter in the above method 1 will generate common mode and differential mode interference, which will affect the detection accuracy; the DC in the above method 2 The / DC converter will generate common mode and differential mode interference, which will affect the detection accuracy

Method used

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  • Electricity-taking method and device for detecting battery internal resistance
  • Electricity-taking method and device for detecting battery internal resistance
  • Electricity-taking method and device for detecting battery internal resistance

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Embodiment Construction

[0040] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0041] refer to image 3 , an embodiment of a method for detecting battery internal resistance and taking electricity according to the present invention is proposed. The method includes:

[0042] Step S10, generating at least two positive and negative power supply circuits for the battery under test to supply power for at least one detection circuit;

[0043] Step S11, performing high-precision sampling on the positive and negative power supply circuits.

[0044] When detecting the internal resistance of the battery pack, at least one positive and one negative power supply circuit is generated for the tested battery in the battery pack to supply power for the detection circuit. A positive and negative two-way power supply circuit can be generated by at least two tested batteries, then the above-mentioned tested bat...

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Abstract

The invention discloses an electricity-taking method and device for detecting battery internal resistance. The method comprises the following steps of: generating at least a positive supply circuit and a negative supply circuit by a detected battery to supply power for at least one detecting circuit; and performing sampling the positive supply circuit and the negative supply circuit accurately. By using the electricity-taking method and device for detecting battery internal resistance, two or more than two detected batteries can be detected by using one detecting circuit; and the internal resistance of the detected battery can be detected on line or off line in real time and ultra-high common-mode rejection ratio can be obtained; the external influence on the detection precision is small, and the precision error can be less than 0.1 milliohm; the electricity-taking method and device for detecting battery internal resistance are applicable to various detection environments.

Description

technical field [0001] The invention relates to the field of battery internal resistance detection, in particular to a method and device for detecting battery internal resistance and taking electricity. Background technique [0002] refer to figure 1 as well as figure 2 , in the prior art, the power-taking methods of the battery internal resistance detection equipment usually include: [0003] 1. Take power from the AC mains, use an AC / DC (alternating current / direct current) converter to connect the detection circuit, and obtain the required voltage through a separate power supply; (such as figure 1 shown) [0004] 2. Take power from a certain battery, directly supply the detection circuit or connect the detection circuit through a DC / DC (direct current / direct current) converter, and provide voltage for the battery internal resistance detection equipment. (Such as figure 2 shown) [0005] In an ordinary battery internal resistance detection device, since the detected...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36G01R27/02
Inventor 石李波颜亮陈振华
Owner SHENZHEN HEADSUN TECH
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