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Direct-current internal resistance measurement method for storage battery

A technology of DC internal resistance and measurement method, which is applied in the direction of measurement device, measurement of electrical variables, measurement of resistance/reactance/impedance, etc., to achieve the effects of accurate measurement, feasible method and simple circuit

Inactive Publication Date: 2014-10-29
STATE GRID CORP OF CHINA +1
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Problems solved by technology

This method uses the processing module to process the current and voltage sampling signals of the digital multiplier, and outputs the data of active power and DC internal resistance, so as to solve the technical problem of battery DC resistance measurement

Method used

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  • Direct-current internal resistance measurement method for storage battery

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Embodiment Construction

[0009] according to figure 1 In the route shown, the voltage sampling 1 and the current sampling 3 are respectively input to the digital multiplier 5 through the voltage A / D converter 2 and the current A / D converter 4, and the data output by the digital multiplier is passed through the RAM+FPGA processing module 6 Processing, the measured value is displayed via the display of active power 7 and DC internal resistance 8.

[0010] The working principle of the present invention:

[0011] RAM+FPGA processing module, parallel port A / D conversion chip AD7805, and variable program operational amplifier PGA205, which send the constant current source signal and the voltage signal at both ends of the battery to the voltage input terminal and current input terminal respectively, and then through the operational amplifier PGA205 amplifies the input signal and sends it to the A / D conversion chip, AD7805 converts the analog signal into a 16-bit digital signal, and the RAM+FPGA processing m...

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Abstract

The invention discloses a direct-current internal resistance measurement method for a storage battery. According to the direct-current internal resistance measurement method, voltage sampling and current sampling are input to a digital multiplier by a voltage A / D converter and a current A / D converter respectively, the data output by the digital multiplier is processed by a RAM+FPGA processing module, and a measurement value is displayed by an active power and direct-current internal resistance display. The direct-current internal resistance measurement method disclosed by the invention is capable of measuring the direct-current resistance of the storage battery, feasible, accurate in measurement, simple in circuit, and suitable for being applied as a method for a direct-current resistance measurement for a storage battery.

Description

technical field [0001] The invention proposes a battery DC internal resistance measurement method applied in the electric power measurement field. Background technique [0002] The DC internal resistance of the battery determines the output power of the battery, but usually the DC internal resistance of the battery cannot be measured, so a method for measuring the DC resistance of the battery is needed. Contents of the invention [0003] In order to measure the DC resistance of the storage battery, the invention proposes a method for measuring the DC resistance of the storage battery. The method utilizes a processing module to process current and voltage sampling signals of a digital multiplier to output data of active power and DC internal resistance, and solves the technical problem of battery DC resistance measurement. [0004] The scheme that the present invention solves technical problem adopts is: [0005] The voltage sampling and current sampling are respectively ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/08
Inventor 王志宏张久军赵广忠韩汝军吴剑男常亮
Owner STATE GRID CORP OF CHINA