Battery protection apparatus, 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

[0005] 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 apparatus, cover plate assembly and battery
  • Battery protection apparatus, cover plate assembly and battery
  • Battery protection apparatus, cover plate assembly and battery

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Embodiment Construction

[0029] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0030] Such as figure 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, second external lead-out sheet 7, memory alloy 8, short circuit resistor 9, first insulating sealing structure 10 for insulating and sealing between the first electrode terminal 2 and the cover plate body 1 and for the second electrode terminal 5 A second sealing structure 11 for sealing with the cov...

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Abstract

The invention provides a battery protection apparatus, a cover plate assembly and a battery. The battery protection apparatus comprises a cover plate body and a temperature memory element; ventilating holes are formed in the cover plate body; the temperature memory element is electrically connected with the cover plate body and seals the ventilating holes; the temperature memory element has a low-temperature memory state disconnected from a first electrode terminal and a high-temperature memory state conducted with the first electrode terminal; and the temperature memory element can be changed from a low-temperature memory state into a high-temperature memory state when the internal temperature of the battery is higher than a preset temperature threshold value. By virtue of the battery protection apparatus, when the internal temperature of the battery is higher than the preset temperature threshold value of the temperature memory element, a short circuit is formed between the first electrode terminal and a second electrode terminal, and the residual energy of the battery is consumed by impedance of the cover plate body, the temperature memory element and other structures, so that risk of ignition or explosion of the battery can be reduced to the maximum degree.

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 subjected to abuse conditions such as impact, foreign object puncture or overheating, a series of complex electrochemical reactions will occur inside the battery. When these abnormalities are not effectively controlled and thermal runaway occurs in the battery, the battery may catch fire or even explode. [0003] 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 ...

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 蒋露霞程晗胡世超杨珂利鲁鹏王信月朱建华
Owner BYD CO LTD
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