Battery voltage detection circuit and battery management system

A battery voltage detection and circuit technology, applied in battery circuit devices, measuring current/voltage, circuit devices, etc., can solve the problems of high standby power consumption, complex battery detection circuit structure, and high cost, and save manufacturing costs and switches. The effect of extremely low quantity and power consumption

Inactive Publication Date: 2012-01-25
SHENZHEN SED IPD INT ELECTRONICS DEVICE
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Problems solved by technology

[0004] The purpose of the embodiment of the present invention is to provide a battery voltage detection circuit, aiming at sol

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  • Battery voltage detection circuit and battery management system
  • Battery voltage detection circuit and battery management system
  • Battery voltage detection circuit and battery management system

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Embodiment Construction

[0015] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0016] In the embodiment of the present invention, the battery to be tested is sampled only through the odd-even interleaving of two operational amplifier units, which has a simple structure and low cost, and adds switch control to further reduce power consumption during standby.

[0017] figure 1 The structure of the battery voltage detection circuit provided by the embodiment of the present invention is shown, and for the convenience of description, only the parts related to the present invention are shown.

[0018] The battery voltage detection circuit provided as an embodiment of the present i...

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Abstract

The invention is suitable for the field of electronic circuits and provides a battery voltage detection circuit and a battery management system. The circuit comprises a plurality of switch units, a first operational amplification unit, a second operational amplification unit, a control unit and a power supply changeover unit; the plurality of switch units are used for switch-on and switch-off under the control of a control signal; the first operational amplification unit is used for sampling voltage of an odd number of corresponding single batteries when the switch units are switched on, and outputting first sampling voltage; the second operational amplification unit is used for sampling voltage of an even number of corresponding single batteries when the switch units are switched on and outputting second sampling voltage; the control unit is used for outputting the control signal and controlling the switch-on and switch-off of the switch units when power is supplied and performing analog-to-digital conversion on the first sampling voltage and the second sampling voltage; and the power supply changeover unit is used for providing a stable working power supply for the control unit.Two operational amplifier units are staggered in an odd and even way and sample a battery to be detected; and the circuit has a simple structure, and is low in cost, reduces the electricity consumption difference of the battery, switch control is provided, and power consumption during standby is further reduced.

Description

technical field [0001] The invention belongs to the field of electronic circuits, in particular to a battery voltage detection circuit and a battery management system. Background technique [0002] Today, as lithium batteries are booming with the development of new energy sources, the requirements for battery management systems are getting higher and higher, and the cost requirements are becoming more and more stringent. In the battery management system, since each battery module is used in series, how to accurately detect the battery voltage of each module while ensuring the lowest power consumption of the battery management system after sleep, and the low power consumption difference in the working state is already a problem. A dream pursued by electronic engineers. [0003] At present, there are four methods in the industry to detect battery voltage: one is to use dedicated chips, such as OMicro’s OZ89xx chips, but the price is expensive; the other is to use differential...

Claims

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Application Information

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IPC IPC(8): G01R31/36G01R19/00H02J7/00
Inventor 张彩辉侯涛巨祥生
Owner SHENZHEN SED IPD INT ELECTRONICS DEVICE
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