Cell protection circuit, cell and mobile terminal

A technology for protecting circuits and mobile terminals, applied in battery circuit devices, emergency protection circuit devices, electric vehicles, etc., can solve problems such as built-in batteries cannot be restored, and achieve the effect of avoiding irrecoverable

CN105655987AActive Publication Date: 2016-06-08YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2016-06-08

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Abstract

The invention discloses and provides a cell protection circuit. Through a first protection module, over-charge protection, over-discharge protection, over-current protection, short circuit protection or superhigh temperature charge and discharge protection of the cell are realized. If a mobile terminal starts the short circuit protection, a second protection module can make an anode of an electrical core be disconnected with an anode of the cell according to an enabled control signal. Machine disassembling is not needed, a built-in cell does not need to be plugged again and the cell and a load can be disconnected so that an impedance of two ends of an electrical core anode and a cathode is greater than a threshold and a condition that the cell returns to work is satisfied. A problem that the built-in cell of the mobile terminal can not be recovered after the short circuit protection in the prior art is avoided. Besides, the invention also provides the cell and the mobile terminal, and the cell protection circuit is included. By using the cell, the mobile terminal and the circuit, the problem that the built-in cell of the mobile terminal can not be recovered after the short circuit protection in the prior art can be avoided.
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Description

technical field

[0001] The present application relates to the technical field of mobile terminals, and more specifically relates to a battery protection circuit, a battery and a mobile terminal. Background technique

[0002] The battery in the mobile terminal is generally a lithium battery, including a battery cell and a protection circuit. Since the lithium battery itself cannot be overcharged, over-discharged, over-current, short-circuited, or charged and discharged at ultra-high temperature, the protection circuit in the prior art needs to be able to protect the above-mentioned situations. The charging and discharging path of the battery core is used to realize various protections for the battery core.

[0003] In the protection circuit in the prior art, after the short-circuit protection is activated, there is a solution to support self-recovery. However, the self-recovery needs to be realized on the basis that the impedance at both ends of the positive and negative el...

Examples

Embodiment Construction

[0060] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0061] The present application provides a battery protection circuit, which is used to solve the problem in the prior art that the built-in battery of a mobile terminal cannot recover after short-circuit protection.

[0062] Specifically, the battery protection circuit, such as figure 1 As shown, it is applied to a battery of a mobile terminal and is connected to the cell 100 in the battery. The battery protection circuit 200 includes: a first protection module 201 and a second prot...