AD7982 based single-battery voltage measuring device for storage battery pack

A technology of AD7982 and storage battery packs, which is applied in the field of voltage measurement devices for battery packs, can solve problems such as low measurement accuracy, common-mode voltage, and accumulation of measurement errors, and achieve the effect of isolating external interference and high measurement accuracy

Inactive Publication Date: 2017-02-08
TIANJIN CHANGHE TECH
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Problems solved by technology

Although the common-mode measurement method has a simple measurement circuit, there is a common-mode voltage during measurement, resulting in the accumulation of measurement errors and low measurement accuracy.

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  • AD7982 based single-battery voltage measuring device for storage battery pack

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Embodiment Construction

[0007] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0008] like figure 1 As mentioned above, the voltage measurement device for battery cells based on AD7982 includes 12 sets of differential conversion single-ended signal circuit measurement units, A / D conversion units and display units. The differential conversion single-ended signal measurement unit includes a differential amplifier circuit and a voltage follower, and the differential amplifier circuit uses AD7982 as a control chip. The display unit includes...

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Abstract

The invention relates to an AD7982 based single-battery voltage measuring device for a storage battery pack, and belongs to the technical field of batteries. 12 groups of difference converting single-end signal circuit measuring units, an A/D conversion unit and a display unit are included. Each difference converting single-end signal circuit measuring unit comprises a difference amplification circuit and a voltage follower, and the difference amplification circuits take AD7982 as a control chip. The display unit comprises a DAC and a display screen. The signal input ends of the difference amplification circuits of the difference measuring units are connected with the single battery, the signal output ends of the difference amplification circuits are connected with the voltage followers respectively, the voltage followers of the 12 groups of difference converting single-end signal circuit measuring units are connected to pins of the A/D converter, and the A/D converter is connected with the display unit. The single-battery voltage of the storage battery pack is measured by using a differential mode method, errors of voltage data do not accumulate, the measuring precision is high, the system uses the voltage followers, and external interference can be isolated.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a voltage measuring device for a storage battery unit. . Background technique [0002] At present, the performance of the battery is usually evaluated by measuring the terminal voltage. The method that can reflect the current battery operation is to measure the terminal voltage of the battery. The methods for measuring battery terminal voltage are mainly common mode method and differential mode method. Although the common-mode measurement method has a simple measurement circuit, there is a common-mode voltage during measurement, which causes the accumulation of measurement errors and low measurement accuracy. Compared with the differential method, the measurement accuracy is higher. Contents of the invention [0003] Aiming at the above-mentioned technical defects, the object of the present invention is to provide a voltage measuring device for battery cells based on AD798...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/25G01R15/14G01R31/36
CPCG01R19/2503G01R15/144G01R31/3835
Inventor 范长和
Owner TIANJIN CHANGHE TECH
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