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Voltage spike suppression circuit and battery protection circuit

A technology for suppressing circuits and voltage spikes, applied in battery overvoltage protection, safety/protection circuits, emergency protection circuit devices, etc. good effect

Pending Publication Date: 2021-06-15
JOULWATT TECH INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of this application is to provide a voltage spike suppression circuit and battery protection circuit to solve the problem of voltage spikes caused by plugging and unplugging battery cables in the prior art

Method used

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  • Voltage spike suppression circuit and battery protection circuit
  • Voltage spike suppression circuit and battery protection circuit
  • Voltage spike suppression circuit and battery protection circuit

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Embodiment Construction

[0028] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0029] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0030] It will be understood that when an element such as a layer, film, region, or substrate is referred to as ...

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Abstract

The invention provides a voltage spike suppression circuit and a battery protection circuit. The voltage spike suppression circuit comprises a first resistor unit, a first switch unit and a voltage comparison unit; the first resistor unit is connected between a first end and a second end of a load; the first switch unit is connected in series or parallel with the first resistor unit; the voltage comparison unit is connected between the first end and the second end of the load; the voltage comparison unit is electrically connected with the first switch unit; and the voltage comparison unit is used for controlling the state change of the first switch unit under the condition that the difference value between an instantaneous voltage and an average voltage is larger than a preset voltage, so that current can pass through the first resistor unit, wherein the instantaneous voltage is an instantaneous sampling voltage between the first end of the load and the second end of the load, and the average voltage is the average value of the voltage between the first end of the load and the second end of the load in a certain time window. The circuit plays a better role in suppressing oscillation for the voltage spike of a chip.

Description

technical field [0001] The present application relates to the field of multi-string battery protection circuits, in particular, to a voltage spike suppression circuit and a battery protection circuit. Background technique [0002] In the application of multi-string battery protection chips, there is often the operation of plugging and unplugging the battery cable. Due to the parasitic inductance and first capacitance of the cable and the chip, it is easy to oscillate during the plug-in process and generate a voltage spike. This voltage may exceed the differential withstand voltage of adjacent pins and pose a threat to the safety of the chip. Such as figure 1 and figure 2 shown. [0003] The above information disclosed in the Background section is only to enhance the understanding of the background of the technology described herein, therefore, the Background may contain certain information which is not formed in the country for those skilled in the art. known prior art....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/18H02H9/04H02J7/00
CPCH02H7/18H02H9/045H02J7/0013H02J7/00308
Inventor 何勇吉杜红霞
Owner JOULWATT TECH INC LTD
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