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A battery protection circuit and its power tube control method

A technology for protecting circuits and power tubes, applied to emergency protection circuit devices, electrical components, etc., can solve problems such as damage to the second power tube M2, damage to the first power tube M1, etc., and achieve the effect of avoiding serious problems of heating

Active Publication Date: 2022-05-13
SHENZHEN ICM MICROELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on this, it is necessary to address the above technical problems and provide a battery protection circuit and its power tube control method to solve the problem that the second power tube M2 is easily damaged if the existing battery protection circuit is connected to a load after the overcharge protection is triggered. , and, if the existing battery protection circuit is connected to the charger after the over-discharge protection is triggered, it is easy to cause damage to the first power tube M1

Method used

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  • A battery protection circuit and its power tube control method
  • A battery protection circuit and its power tube control method
  • A battery protection circuit and its power tube control method

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Embodiment Construction

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0042] In the first embodiment, if figure 2 As shown, a power tube control method for a battery protection circuit is provided, including the following steps:

[0043] S01: Detect whether the over-discharge protection of the battery protection circuit is triggered.

[0044] In this step, the following steps are used to detect whether the over-discharge protection of the battery protection circuit is triggered:

[0045] S011: Detect the terminal volt...

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Abstract

The invention discloses a battery protection circuit and a power tube control method thereof, which include an overcharge protection circuit, a logic control circuit and a state detection circuit. The state detection circuit includes a first state transition detection module and a second state transition detection module. The first state transition detection module detects the working state of the battery during overcharging in real time. When the state detection circuit detects that the battery is in an overcharged state and the battery is discharging, the control logic control circuit changes the output signal of the control terminal CO from low to low. It is high level, so that the second power tube is turned on, effectively avoiding the serious problem of heating of the second power tube; the second state transition detection module is used to detect the working state of the battery during over-discharge in real time, when it is detected that the battery is over-discharge state, and when the battery is charging, the control logic control circuit changes the output signal of the control terminal DO from low level to high level, and turns on the first power tube, effectively avoiding the serious problem of heating of the first power tube.

Description

technical field [0001] The invention relates to the technical field of emergency protection circuit devices, in particular to a battery protection circuit and a power tube control method thereof. Background technique [0002] Battery protection circuits in the prior art such as figure 1 As shown, it includes battery protection chip 01, which contains over-discharge protection circuit, over-charge protection circuit, over-current protection circuit, delay circuit and logic control circuit (ie figure 1 The logic circuit in), wherein the over-discharge protection circuit, over-charge protection circuit, and over-current protection circuit are respectively connected to the delay circuit, the delay circuit is connected to the logic control circuit, and the control terminal of the logic control circuit is connected to the first battery charging and discharging circuit. The power tube M1 and the second power tube M2. [0003] In the above battery protection circuit, the over-disc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/18
CPCH02H7/18
Inventor 陈钢白青刚
Owner SHENZHEN ICM MICROELECTRONICS CO LTD
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