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Secondary protection module and circuit for lithium battery

A secondary protection and protection module technology, applied in battery overcurrent protection, battery disconnection circuit, battery circuit device, etc., can solve problems such as endangering human life and property safety, circuit loss of protection function, lithium battery explosion, etc., to achieve The development difficulty is low, the working environment is not required, and the effect of ensuring circuit safety

Pending Publication Date: 2022-01-21
华羿微电子股份有限公司
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Problems solved by technology

However, due to the characteristics of semiconductor materials, after the device is damaged and fails, it will be short-circuited to the outside world. Therefore, in some extreme abnormal environments such as high temperature, the BMS power MOSFET fails unexpectedly. At this time, the circuit loses its protection function. The battery explodes, catches fire, burns the load, etc., and even endangers the safety of personnel and property

Method used

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  • Secondary protection module and circuit for lithium battery
  • Secondary protection module and circuit for lithium battery
  • Secondary protection module and circuit for lithium battery

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0036] In this specification, when an element is referred to as being "connected or coupled to" another element or "disposed in another element", it may be "directly" connected or coupled to the other element or " directly" is set in another element. or connected to or coupled to or disposed in another element with other elements interposed therebetween, unless it is volumetrically "coupled or connected to" another element or "directly disposed" in another element in a component. In addition, it will be understood that when an element is referred to as being "on," "above," "beneath" or "beneath" another element, it can be the same as that of another element. An element "directly" contacts or is in contact with another element with other elements interposed therebetween unle...

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Abstract

The invention relates to the technical field of energy storage lithium batteries, in particular to a secondary protection module and circuit for a lithium battery. The protection module comprises: a fuse, wherein an input port and an output port are formed at the joint of the two ends of the fuse; and a MOSFET, wherein a grid electrode of the MOSFET forms a grid electrode port, a source electrode of the MOSFET forms a source electrode port, and a drain electrode of the MOSFET forms a drain electrode port. The MOSFET and the fuse are packaged in the protection module, and the protection module is connected in series in the lithium battery protection circuit and is used for realizing short circuit of the lithium battery. The secondary protection circuit of the lithium battery comprises: the protection module; the lithium battery, wherein the positive electrode of the lithium battery is connected with the input port of the protection module, and the negative electrode of the lithium battery is connected with the source port of the protection module; and a BMS, wherein one end of the BMS is respectively connected with the output port, the grid electrode port and the source electrode port of the protection module, and the other end of the BMS is connected with a load. According to the invention, potential safety hazards such as battery explosion and fire caused by failure of the power MOSFET of the BMS can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of energy storage lithium batteries, and more specifically relates to a lithium battery secondary protection module and a protection circuit. Background technique [0002] With the development of lithium battery energy storage technology and the widespread popularization of related energy storage equipment and new energy equipment, energy storage lithium batteries have entered every corner of daily life. But what followed were many explosions, fires and other safety accidents caused by lithium batteries, which caused irreparable damage and harm to personnel safety, property safety and other aspects. [0003] Most of the traditional lithium battery protection systems (BMS) use the power device MOSFET in series in the battery-load power circuit. When various abnormal problems such as short circuit and overload occur, the MOSFET turns off and cuts off the power circuit to ensure circuit safety. However, due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/18H02J7/00
CPCH02H7/18H02J7/00304H02J7/0031
Inventor 李福全刘义芳张旭生
Owner 华羿微电子股份有限公司
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