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Over-current detection circuit, integrated device and battery management system

A technology for overcurrent detection and detection of transistors, applied in the direction of current collectors, electrical components, circuit devices, etc., can solve problems such as inaccurate detection

Pending Publication Date: 2021-12-10
ZHUHAI MAIJU MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the process of overcurrent detection, the detected current is affected by the manufacturing process of the transistor and the ambient temperature, so the detection is not accurate

Method used

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  • Over-current detection circuit, integrated device and battery management system
  • Over-current detection circuit, integrated device and battery management system
  • Over-current detection circuit, integrated device and battery management system

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Embodiment Construction

[0045] 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.

[0046] 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.

[0047] 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 invention provides an over-current detection circuit. Theover-current detection circuit is used for detecting the charging and discharging over-current condition of a battery / battery pack and controlling charging and discharging of the battery / battery pack through a charging control transistor and a discharging control transistor which are connected with the battery / battery pack in series. The drain electrode of the charging control transistor is connected with the drain electrode of the discharging control transistor, and the over-current detection circuit comprises a first detection transistor, a second detection transistor, a first voltage acquisition circuit, a second voltage acquisition circuit, a constant current source and a comparison unit. The invention also provides an integrated device and a battery management system.

Description

technical field [0001] The disclosure provides an overcurrent detection circuit, an integrated device and a battery management system. Background technique [0002] With the technical development of rechargeable batteries, rechargeable batteries have been widely used in various fields such as electric tools, portable devices, electric vehicles, etc. at present. By charging the rechargeable battery and providing it to the electric device. However, it is necessary to detect the charging current and discharging current during the charging and discharging process of the rechargeable battery to avoid the occurrence of overcharge and overdischarge, thereby avoiding the occurrence of safety accidents and the damage of battery life. [0003] Therefore, in the case of charging overcurrent and discharging overcurrent, a prompt should be given or the work of the rechargeable battery should be stopped. At present, in the process of overcurrent detection, the detected current is affect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/165H02J7/00H02H7/18
CPCG01R19/16571G01R19/16519G01R19/16523H02J7/00302H02J7/00306H02J7/0047H02H7/18
Inventor 不公告发明人
Owner ZHUHAI MAIJU MICROELECTRONICS CO LTD