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Battery protection circuit and system

A technology for protecting circuits and batteries, applied in battery overcharge protection, battery overcurrent protection, battery disconnection circuits, etc., can solve problems such as user falling down, system power failure, etc., and achieve the effect of reducing the possibility

Inactive Publication Date: 2017-10-13
NANJING ZGMICRO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application proposes a battery protection circuit and system to solve the technical problem in the prior art that a sudden power failure may cause a system power outage and cause the user to fall off the electric vehicle

Method used

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  • Battery protection circuit and system
  • Battery protection circuit and system

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Embodiment Construction

[0015] In order to make the technical solutions and advantages of the present application clearer, the exemplary embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all implementations. Exhaustive list of examples. And in the case of no conflict, the embodiments in this description and the features in the embodiments can be combined with each other.

[0016] Aiming at the deficiencies of the prior art, the embodiment of the present application proposes a battery protection circuit and system, which will be described below.

[0017] figure 1 shows the schematic structure of the battery protection circuit in the embodiment of the present application Figure 1 , as shown in the figure, the battery protection circuit ( figure 1 The structural part in the dotted frame) can include: a compensation type ov...

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Abstract

The invention provides a battery protection circuit and system. The battery protection circuit comprises a compensation type overdischarge detection circuit, an average sampling circuit and a control circuit, wherein the compensation type overdischarge detection circuit is connected with the control circuit and the average sampling circuit, the average sampling circuit is used for acquiring a discharge current, the control circuit is used for switching off a discharge control switch by outputting a discharge control signal when the compensation type overdischarge detection circuit detects that a voltage of a battery cell is lower than an over-discharge detection voltage threshold, and the overdischarge detection voltage threshold is in negative correlation with a discharge current. By the battery protection circuit, a battery can be more accurately controlled to discharge, and abrupt power failure is prevented.

Description

technical field [0001] The present application relates to the technical field of power batteries, in particular to a battery protection circuit and system. Background technique [0002] At present, all kinds of electric vehicles are becoming more and more popular, such as: electric twisting cars, electric balance cars, etc. Generally, these electric cars are powered by lithium batteries, and there may be uphill operations during use. At this time, the motor needs to be enlarged The horsepower climbs the slope, causing the battery discharge current to increase sharply; however, the battery has a large equivalent internal resistance, which leads to a drop in the output voltage of the battery, and in severe cases, the output voltage of the battery is lower than the overvoltage discharge protection of the traditional battery protection circuit Threshold, the battery protection circuit enters the overvoltage discharge protection state, and the output current is prohibited, which ...

Claims

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Application Information

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IPC IPC(8): H02H7/18H02J7/00
CPCH02H7/18H02J7/00302H02J7/00304H02J7/00306H02J7/0031
Inventor 王钊
Owner NANJING ZGMICRO CO LTD
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