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Rechargeable battery protection circuit and mobile terminal

A technology for rechargeable batteries and protection circuits, applied in battery disconnection circuits, battery circuit devices, safety/protection circuits, etc., can solve problems such as battery damage and voltage sampling results, and achieve the effect of avoiding damage

Inactive Publication Date: 2016-08-17
LEMOBILE INFORMATION TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] All impedances will affect the sampling results of the voltage
Existing process technology usually controls the above impedance and limits it within 100mohm
In the case of small current charging, the limited impedance will not affect the charging process, but in the case of high current charging, even if it is limited, the impedance will still affect the charging process, that is, the charger will end the constant current charging in advance mode, and switch to constant voltage charging mode, or make the charger unable to switch from constant current charging mode to constant voltage charging mode in time, causing damage to the battery

Method used

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  • Rechargeable battery protection circuit and mobile terminal
  • Rechargeable battery protection circuit and mobile terminal
  • Rechargeable battery protection circuit and mobile terminal

Examples

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Effect test

no. 1 example

[0026] The rechargeable battery module of the first embodiment includes a rechargeable battery 30 and a battery protection circuit. The battery protection circuit is connected between the rechargeable battery 30 and the charger (or load).

[0027] The battery protection circuit has: a first input terminal I+ and a second input terminal I-, a first output terminal P+ and a second output terminal P-, a first voltage sampling terminal S+ and a second voltage sampling terminal S-. The first input terminal I+ and the second input terminal I- are respectively connected to the positive and negative poles of the rechargeable battery; the first output terminal P+ and the second output terminal P- are connected to the charger or load; the first voltage sampling terminal S+ and the second voltage The sampling terminal S- is connected to the voltage sampling circuit at the charger end.

[0028] The battery protection circuit further includes: a resistor R1 , a capacitor C1 , a discharge ...

no. 2 example

[0039] The rechargeable battery module of the second embodiment includes a rechargeable battery 30 and a battery protection circuit. The battery protection circuit is connected between the rechargeable battery 30 and the charger (or load).

[0040] The battery protection circuit has: a first input terminal I+ and a second input terminal I-, a first output terminal P+ and a second output terminal P-, a first voltage sampling terminal S+ and a second voltage sampling terminal S-. The first input terminal I+ and the second input terminal I- are respectively connected to the positive and negative poles of the rechargeable battery; the first output terminal P+ and the second output terminal P- are connected to the charger or load; the first voltage sampling terminal S+ and the second voltage The sampling terminal S- is connected to the voltage sampling circuit.

[0041] The battery protection circuit also includes: resistor R1, capacitor C1, discharge protection transistor M1, cha...

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PUM

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Abstract

The invention discloses a rechargeable battery protection circuit and a mobile terminal comprising the same. The rechargeable battery protection circuit is used for protecting a rechargeable battery during the charging and discharging processes and comprises a first input terminal, a second input terminal, a first output terminal, a second output terminal and an overcurrent protection device, wherein the first input terminal and the second input terminal are separately connected to two ends of the rechargeable battery, the first output terminal and the second output terminal are separately connected to the first input terminal and the second input terminal and are connected to a load or a charging device, the overcurrent protection device is used for disconnecting the connection between the first input terminal and the first output terminal or disconnecting the connection between the second in put terminal and the second output terminal when the charging current or the discharging current of the rechargeable battery exceeds a preset current value, the rechargeable battery protection circuit also comprises a first voltage sampling terminal and a second voltage sampling terminal, and the first voltage sampling terminal and the second voltage sampling terminal are used for acquiring the voltages of the two ends of the rechargeable battery and providing the voltages for a charging device.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a rechargeable battery protection circuit and a mobile terminal. Background technique [0002] The types of portable electronic devices (such as mobile phones, tablet computers, or wearable devices, etc.) are increasing and becoming more and more popular. These electronic devices are all powered by rechargeable battery modules. [0003] In related prior art, a rechargeable battery module of a portable electronic device includes a rechargeable battery (Rechargeable Battery) and a protection circuit for protecting the safety of the rechargeable battery. Rechargeable batteries, also known as secondary batteries, are based on the reversibility of chemical reactions, that is, after a chemical reaction is converted into electrical energy, the electrical energy can be used to repair the chemical system, and then the chemical reaction can be converted into electrical energy. Currentl...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/0031H02J7/0036H02J7/0068
Inventor 孔繁博
Owner LEMOBILE INFORMATION TECH BEIJING
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