Self-activation circuit and battery protection system with same

A self-activation, battery technology, used in battery overcharge protection, battery overcurrent protection, battery overdischarge protection, etc., can solve the problems of the battery protection chip cannot be activated, the battery protection system cannot work normally, etc., to improve reliability. Effect

Active Publication Date: 2016-07-06
深圳源码智能照明有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the battery protection chip in the battery protection system is connected to the battery, the battery protection chip often cannot be activated because the level of the detection pin CS is in an uncertain state, so that the battery protection system cannot work normally.

Method used

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  • Self-activation circuit and battery protection system with same
  • Self-activation circuit and battery protection system with same

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Embodiment Construction

[0015] Below in conjunction with accompanying drawing and embodiment, further elaborate the present invention.

[0016] In the battery protection system, the battery protection chip is often used to detect and protect the overcharge, overdischarge and overcurrent of the rechargeable battery. The detection pin CS of the battery protection chip is used to detect the overcharge, overdischarge and overcurrent of the battery; the discharge control pin OD is used to control the discharge switch of the battery; the charge control pin OC is used to control the charge switch of the battery. The battery protection chip detects whether the battery is overcharged, overdischarged, or overcurrent through the detection pin CS, and outputs control signals through the discharge control pin OD and charge control pin OC to control the discharge switch or charge switch of the circuit where the battery is located. off.

[0017] When the battery protection system is connected to the battery, the d...

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Abstract

The invention discloses a self-activation circuit, which comprises an N-type MOS tube Q4, a PNP-type triode Q2, resistors R20, R21, R24 and R25 and a capacitor C2, wherein one end of the resistor R25 is used for being connected with a detection pin (CS) of a battery protection chip; the second end of the resistor R25 is connected with a drain of the N-type MOS tube Q4; a source of the N-type MOS tube Q4 is connected with a ground terminal of a storage battery; a gate of the N-type MOS tube Q4 is connected with the ground terminal of the storage battery through the resistor R20; a collector of the PNP-type triode Q2 is connected with the gate of the N-type MOS tube Q4; an emitter of the PNP-type triode Q2 is used for being connected with a positive port (PB+) of the storage battery; a base of the PNP-type triode Q2 is connected with the positive port (PB+) of the storage battery through the resistor R21; the base of the PNP-type triode Q2 is connected with the ground terminal of the storage battery through the resistor R24; and the capacitor C2 is connected with the resistor 24 in parallel. The self-activation circuit can automatically pull down the level of the detection pin CS of the battery protection chip when a battery protection system is connected to a battery cell for the first time, so that the battery protection system is automatically activated; and the reliability of the battery protection system is improved.

Description

technical field [0001] The invention relates to the technical field of battery management, in particular to a self-activating circuit and a battery protection system with the self-activating circuit. Background technique [0002] When the battery protection chip in the battery protection system is connected to the battery, the battery protection chip often cannot be activated because the level of the detection pin CS is in an uncertain state, so that the battery protection system cannot work normally. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention proposes a self-activation circuit, which can automatically pull down the detection pin CS level of the battery protection chip when the battery protection system is connected to the battery cell for the first time, so that the battery The protection system is automatically activated, improving the reliability of the battery protection system. [0004] In order to achieve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/18
CPCH02H7/18H02J7/00302H02J7/00304H02J7/00306
Inventor 尹振坤项佰川王兴庆
Owner 深圳源码智能照明有限公司
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