Composite explosion-proof valve, cover plate assembly and battery

A technology of explosion-proof valve and cover plate, which is applied in the direction of secondary battery, battery pack parts, and secondary battery repair/maintenance. Effect

Active Publication Date: 2018-02-06
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that the existing voltage-controlled explosion-proof valve still has the risk of ba

Method used

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  • Composite explosion-proof valve, cover plate assembly and battery
  • Composite explosion-proof valve, cover plate assembly and battery
  • Composite explosion-proof valve, cover plate assembly and battery

Examples

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Example Embodiment

[0049] Example

[0050] This example will specifically explain the battery, cover assembly and composite explosion-proof valve 6 disclosed in the present invention.

[0051] Such as figure 1 As shown, this example discloses a battery. The battery includes a housing 2, a pole core, and a cover plate assembly. The cover plate assembly and the housing 2 form a closed space, and the pole core is installed in the closed space. The battery in this example may be a lithium ion battery, or other types of nickel batteries or lead-acid batteries. The pole core is formed by winding or stacking a positive electrode sheet, a separator, and a negative electrode sheet, which are known to the public. The above-mentioned cover assembly includes a cover body 1 on which a composite explosion-proof valve 6 is installed. Among them, generally, the first electrode assembly 3 and the second electrode assembly 4 with different polarities are also insulated and installed on the cover plate assembly. The...

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Abstract

The invention provides a composite explosion-proof valve, a cover plate assembly and a battery so as to solve the problem that battery combustion or explosion risk still exists in conventional pressure-controlled explosion-proof valves. The composite explosion-proof valve comprises a temperature-controlled explosion-proof membrane and a pressure-controlled explosion-proof membrane, wherein a flameretardant structure is arranged between the temperature-controlled explosion-proof membrane and the pressure-controlled explosion-proof membrane. According to the battery, the cover plate assembly and the composite explosion-proof valve, the temperature-controlled explosion-proof membrane and the pressure-controlled explosion-proof membrane are mounted on the composite explosion-proof valve, andthe flame retardant structure is arranged between the temperature-controlled explosion-proof membrane and the pressure-controlled explosion-proof membrane. Therefore, that composite explosion-proof valve can release/relieve pressure timely when the battery is abnormal, external oxygen is effectively isolated from entering, occurrence of battery combustion and explosion is prevented, and secondarydisaster and larger abnormality are avoided.

Description

technical field [0001] The invention relates to the battery field, in particular to an explosion-proof valve installed on a battery cover assembly. Background technique [0002] With the gradual development of science and technology, the safety of a large number of batteries used in automobiles, energy storage devices, electronic equipment, etc. has attracted more and more attention. The air pressure increases significantly, which may cause the battery to explode if measures are not taken in time. [0003] For this reason, in order to prevent the occurrence of battery explosion, a voltage-controlled explosion-proof valve (or safety valve) is generally installed on the battery cover plate. Existing pressure-controlled explosion-proof valves generally include one or more layers of pressure-controlled explosion-proof membranes. When the internal air pressure of the battery exceeds the opening pressure of the explosion-proof valve, the explosion-proof valve opens to release th...

Claims

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Application Information

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IPC IPC(8): H01M2/12H01M10/42H01M50/342
CPCH01M10/4235H01M50/3425Y02E60/10
Inventor 蒋露霞胡世超杨珂利程晗朱建华朱燕
Owner BYD CO LTD
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