Rechargeable battery protection circuit
A rechargeable battery and protection circuit technology, which is applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of high power consumption in reversed circuits, achieve the effects of protecting service life, stable performance, and reducing production costs
Active Publication Date: 2017-04-12
QINGDAO GOERTEK
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Problems solved by technology
[0003] In order to solve the problem of large power consumption of the existing rechargeable battery preventing reverse connection circuit, the present invention proposes a rechargeable battery protection circuit, and adopts the following technical solutions to realize it:
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[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0020] refer to figure 1 , The rechargeable battery protection circuit of this embodiment includes a rechargeable battery, an anti-reverse circuit, a power chip, a controller MCU and other peripheral circuits.
[0021] The anti-reverse circuit of this embodiment adopts P-channel MOS transistors, and makes full use of the small conduction internal resistance of the MOS transistors, which has the advantage of voltage drop compared with diode anti-reverse circuits. The power consumption of the system. In order to avoid damage caused by over-discharge of the rechargeable battery, this embodiment also includes a controller MCU and a voltage monitoring circuit, the input end of the monitoring circuit is connected to the power output end of the rechargeable battery, and the output end is connected to the voltage of the controller. The monitoring t...
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The invention provides a rechargeable battery protection circuit. The rechargeable battery protection circuit comprises a rechargeable battery, a power supply chip, an anti-anti-charging circuit and a charging circuit, wherein the anti-anti-charging circuit and the charging circuit are connected between the rechargeable battery and the power supply chip. The anti-anti-charging circuit is an anti-anti-charging MOS transistor. The grid electrode of the anti-anti-charging MOS transistor is grounded. The source electrode of the anti-anti-charging MOS transistor is connected with a power input end of the power supply chip. The drain electrode of the anti-anti-charging MOS transistor is connected with a power output end of the rechargeable battery. Through the rechargeable battery protection circuit, power consumption of a system can be reduced, the service life of the battery is prolonged, and production cost of products is greatly reduced. Compared with other rechargeable battery protection circuits, the rechargeable battery protection circuit has the advantages of being simple in design, stable in performance, low in cost, applicable to various types of anti-anti-charging type rechargeable battery protection circuits.
Description
technical field [0001] The invention relates to a protection circuit for a rechargeable battery, in particular to a protection circuit capable of preventing reverse connection of a rechargeable battery. Background technique [0002] At present, consumer electronics products are developing rapidly, and rechargeable batteries are being used more and more widely. Rechargeable batteries have the advantages of economy, environmental protection, sufficient power, suitable for high power, long-term use, etc., and are deeply loved by consumers. Due to the negligence in the structure of such consumer electronic products, on the one hand, the negative pressure formed when the battery is reversed can easily break through the power chip, causing irreversible damage. The existing solution is to connect the battery between the rechargeable battery and the power chip. Anti-reverse diodes are added, but due to the excessive voltage drop of the diodes, the power consumption of the system is...
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IPC IPC(8): H02H11/00H02H7/18
Inventor 刘强屠长涛
Owner QINGDAO GOERTEK