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Battery voltage monitoring device and battery management system

A battery voltage and monitoring device technology, applied in battery circuit devices, measuring devices, circuit devices, etc., can solve problems affecting measurement accuracy, leakage of parasitic diodes, and limited sampling accuracy

Active Publication Date: 2021-06-25
ZHUHAI MAIJU MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because high voltage is easy to cause parasitic diode leakage to affect measurement accuracy, such a high absolute voltage also leads to limited sampling accuracy
[0005] High voltage can also cause reliability problems, because the acquisition switch is always exposed to high voltage, which is prone to gate hot carrier injection, resulting in failure of the threshold voltage, or collusion between the source and drain withstand voltage drift regions, and finally leads to system failure. Reliability issues with short circuit or complete failure of the sampling circuit

Method used

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  • Battery voltage monitoring device and battery management system
  • Battery voltage monitoring device and battery management system
  • Battery voltage monitoring device and battery management system

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Embodiment Construction

[0049] The present disclosure will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific implementation manners described here are only used to explain relevant content, rather than to limit the present disclosure. It should also be noted that, for ease of description, only parts related to the present disclosure are shown in the drawings.

[0050] It should be noted that, in the case of no conflict, the implementation modes and the features in the implementation modes in the present disclosure can be combined with each other. The technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings and in combination with implementation manners.

[0051] Unless otherwise specified, the illustrated exemplary embodiments / embodiments are to be understood as exemplary features providing various details of some manner in which the technical idea of ​​the pre...

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Abstract

The present disclosure provides a battery voltage monitoring device, which is used to monitor the voltage of each battery in a battery pack, the battery pack includes a plurality of batteries connected in series with positive and negative electrodes, and the battery voltage monitoring device includes a voltage conversion unit, a gate unit and a current compensation unit, wherein the current compensation unit can independently generate the compensation current of each battery based on the battery voltage difference of each battery. The present disclosure also provides a battery management system.

Description

technical field [0001] The present disclosure relates to the field of battery management, in particular to a battery voltage monitoring device and a battery management system. Background technique [0002] In the battery system, the overcharging and overdischarging of the battery will not only reduce the service life of the battery, but also cause safety accidents such as explosion and fire in severe cases. [0003] Assuming that the positive and negative voltage difference of a single battery is V(BAT), then the positive and negative voltages of each battery in the high-voltage series battery pack are n*V(BAT), (n-1)*V( BAT), ... 2*V(BAT), V(BAT), because the battery pack is composed of n batteries in series, usually V(BAT)=3.7V, n=2~100, so any battery The absolute voltage of the positive and negative poles of the battery to the "ground" (AGND) is very high, about 10-400V, and high-voltage-resistant devices are required for voltage signal acquisition. High-voltage-resista...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00G01R31/382H01M10/42
CPCG01R31/382H01M10/4207H01M10/425H01M2010/4271H02J7/0014H02J7/0047H02J7/00302H02J7/00306Y02E60/10
Inventor 周号
Owner ZHUHAI MAIJU MICROELECTRONICS CO LTD