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Integrated circuit (IC) with adjustable protection threshold for protecting a plurality of lithium batteries

A technology for protecting circuits and integrated circuits, applied in battery circuit devices, circuit devices, current collectors, etc., can solve problems such as limited protection thresholds, and achieve the effects of adjustable protection thresholds, simple circuit design, and wide application range.

Active Publication Date: 2011-05-18
宿松县市场监督管理局市场监督检验所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide an integrated circuit with adjustable threshold value of multi-cell lithium battery protection circuit, which solves the problem of limited protection threshold value in the existing multi-cell lithium battery protection IC, and realizes adjustable protection threshold value

Method used

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  • Integrated circuit (IC) with adjustable protection threshold for protecting a plurality of lithium batteries
  • Integrated circuit (IC) with adjustable protection threshold for protecting a plurality of lithium batteries
  • Integrated circuit (IC) with adjustable protection threshold for protecting a plurality of lithium batteries

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Embodiment Construction

[0022] like figure 2 As shown, the preferred embodiments of the present invention are further described in detail.

[0023] An integrated circuit with adjustable threshold value of multi-cell lithium battery protection circuit, the integrated circuit mainly has the following terminals: [0015] Table 1

[0024] Terminals

describe

CO

External MOSFET charging control terminal

do

External MOSFET discharge control terminal

VM

Charge and discharge circuit current detection terminal

VCC

Chip power supply terminal

GND

Chip ground potential terminal

VR

External resistor terminal

[0025] The present invention mainly includes voltage sampling circuits 1 and 2, an external adjustable resistor R, a reference current generating circuit 3, an adjustable voltage control circuit 4, a comparison circuit 5, and a logic control circuit 6.

[0026] The voltage sampling circuit 1 is mainly connected to the powe...

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Abstract

The invention mainly discloses an IC with adjustable protection threshold for protecting a plurality of lithium batteries. The IC comprises a chip power supply terminal VCC, a discharge circuit current detection terminal VM, a chip ground potential terminal GND, an outlaid MOSFET charging control terminal CO, an outlaid MOSFET discharge control terminal DO, and an external resistance terminal VR arranged on a chip, wherein an outlaid adjustable resistor R is connected with a chip power supply grounding end; and the protection threshold can be adjusted by adjusting the resistance of the outlaid adjustable resistor. The IC solves the problem of limited protection threshold of the prior IC for protecting the plurality of lithium batteries, and can achieve the adjustable over-voltage and over-current protection threshold.

Description

technical field [0001] The invention relates to a lithium-ion battery protection integrated circuit, in particular to an integrated circuit with adjustable thresholds for a multi-section lithium battery protection circuit. Background technique [0002] In recent years, due to the many advantages of lithium batteries such as small size, high energy density, no memory effect, high cycle life, high voltage battery and low self-discharge rate, more and more electronic products such as digital cameras, PDAs, and mobile phones use lithium batteries. Batteries serve as the main power source. [0003] However, due to the chemical characteristics of lithium-ion batteries, during normal use, there is a positive chemical reaction in which electric energy and chemical energy are converted internally, but under certain conditions, such as overcharging, over-discharging and over-current will Lead to chemical side reactions inside the battery. After the side reactions are intensified, it ...

Claims

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Application Information

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IPC IPC(8): H02J7/00
Inventor 田剑彪
Owner 宿松县市场监督管理局市场监督检验所
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