Battery protection device, a cover plate assembly and battery

A battery protection device and cover technology, applied in battery pack parts, battery covers/end covers, electrical components, etc., can solve problems such as battery fire or even explosion, so as to reduce the risk of fire or explosion, reduce risks, and prevent The effect of chain hidden dangers

Pending Publication Date: 2017-11-24
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is aimed at the existing battery protection device that adopts the method of cutting off the circuit to protect the battery. When the battery is thermally out of control and the circuit is cut off, the battery power is not reduced, and the risk of causing the battery to catch fire or even explode is still relatively high. defects, providing a battery protection device

Method used

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  • Battery protection device, a cover plate assembly and battery
  • Battery protection device, a cover plate assembly and battery
  • Battery protection device, a cover plate assembly and battery

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Embodiment Construction

[0031] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the following combination Attached picture And embodiment, the present invention is described in further detail. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0032] as shown in the picture 1 As shown, the cover assembly provided by an embodiment of the present invention includes a cover body 1, a first electrode terminal 2, a first inner lead piece 3, a first outer lead piece 4, a second electrode terminal 5, a second inner lead Sheet 6, bimetallic sheet 7, short-circuit resistor 8, first sealing structure 9 for insulating and sealing between the first electrode terminal 2 and the cover plate body 1 and between the second electrode terminal 5 and the cover plate body 1 The insulating and sealing second insulating and sealing structure...

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Abstract

The invention provides a battery protection device, a cover plate assembly and a battery. The battery protection device comprises a cover plate body and a temperature memory component, wherein one end of the temperature memory component is electrically connected with a second electrode terminal, the temperature memory component has a low-temperature memory form and a high-temperature memory form, the other end of the temperature memory component is disconnected and contacted with the cover plate body respectively in the low-temperature memory form and the high-temperature memory form, and the temperature memory component can be deformed to the high-temperature memory form from the low-temperature memory form when the internal temperature in the battery is higher than a preset temperature control threshold. In the battery protection device, a short circuit is formed between the first electrode terminal and the second electrode terminal when the internal temperature in the battery exceeds the preset temperature threshold of the temperature memory component, the residual energy of the battery is consumed by means of impedance of a structure such as the cover plate body and the temperature memory component, and a fire or explosion risk of the battery is reduced.

Description

technical field [0001] The invention belongs to the technical field of battery safety protection, and in particular relates to a battery protection device, a cover plate assembly and a battery. Background technique [0002] At present, most batteries have no safety protection structure on their cover plates, and the cover plates are only used as supporting poles. When the battery is subject to abuse conditions such as impact, foreign object puncture or overheating, the Ministry A series of complex electrochemical reactions occur. When these abnormalities are not effectively controlled and thermal runaway occurs in the battery, the battery may catch fire or even explode. [0003] middle Taiwan Patent TW093118829 discloses a battery protection device, the battery has at least two conductive terminals and at least one conductive lead, and the conductive lead keeps in contact with the conductive terminals to connect the circuit. The battery protection device includes at lea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/34H01M2/04H01M50/147H01M50/581
CPCH01M50/147H01M50/581Y02E60/10
Inventor 鲁鹏蒋露霞胡世超杨珂利王信月程晗
Owner BYD CO LTD
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