Multi-cell battery pack protection circuit

A multi-cell battery and protection circuit technology, applied in emergency protection circuit devices, measuring current/voltage, measuring electricity, etc., can solve problems such as the danger of battery packs, and achieve the effect of saving manufacturing costs and power consumption

Active Publication Date: 2010-08-11
AOTU ELECTRONICS WUHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A battery pack can also be dangerous if the discharge voltage of the battery falls below the low voltage threshold

Method used

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  • Multi-cell battery pack protection circuit
  • Multi-cell battery pack protection circuit
  • Multi-cell battery pack protection circuit

Examples

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Embodiment Construction

[0015] The present invention will be fully described below with reference to the accompanying drawings. The present invention may be embodied in several different forms and should not be construed as limited to the specific structure and function described in this specification. Rather, it should be understood that the description provided in the specification can fully and fully convey the scope of the present invention to those skilled in the art. Based on the description of the specification, those skilled in the art should understand that the scope of the present invention is intended to cover all embodiments of the present invention disclosed herein, implemented independently or in combination with other embodiments of the present invention. For example, an apparatus may be implemented or a method may be performed using any number of the embodiments presented herein. Additionally, the scope of the present invention also includes such an apparatus or method. Such an appa...

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Abstract

A voltage detection circuit can include a status sensing network and a comparing network. The status sensing network can simultaneously detect a cell voltage for each battery cell of a plurality of battery cells. The comparing network can simultaneously compare the detected cell voltages with a predetermined voltage threshold by comparing the maximum of the cell voltages with a first (high-voltage) threshold, and by comparing the minimum of the cell voltages with a second (low-voltage) threshold. The comparing network can also generate an indication signal when a cell voltage does not satisfythe respective voltage threshold.

Description

technical field [0001] The invention relates to a battery protection circuit, in particular to a circuit for detecting the charging and discharging state of a battery pack containing multiple rechargeable batteries. Background technique [0002] The rechargeable battery provides power and there are no power cord limitations. They are widely used in portable devices, such as cell phones, personal digital assistants (PDAs), notebook computers, and power tools, and are currently used in electric vehicles. The rechargeable battery may be a nickel-cadmium battery (NiCd, nickel-cadmium), a tweezers hydrogen battery (NiMH, nickel-metal hydride), or a lithium ion battery (LiIon, Lithium ion). [0003] Multiple cells can be connected in series to form a battery pack. The battery pack can be charged by a DC source, such as an AC / DC adapter, and discharged by a load, such as a resistor. If the battery's charging voltage exceeds the high voltage threshold, the battery pack may burn o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/165G01R31/36H02H7/18
CPCG01R31/3658G01R19/16542G01R31/396
Inventor 栗国星
Owner AOTU ELECTRONICS WUHAN
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