A piercing gas guiding pressure relief valve for a soft pack power battery

A power battery and pressure relief valve technology, applied in electrical components, battery pack components, circuits, etc., can solve the problems of easy cracking of seals, affecting service life, battery leakage, etc., and achieves low price and wide application. Effect
CN109817864BActive Publication Date: 2020-07-24NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2020-07-24

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Abstract

The invention discloses a puncture gas guide pressure relief valve for a soft pack power battery, which comprises a ring cover, a connecting ring, a ring body, a gas check valve, a waterproof breathable membrane, a ring cover and a puncture part; one end of the connecting ring and One end of the ring cover is fixedly connected, and the other end extends into the ring body and is interference fit with the ring body; the piercing part is fixed at the other end of the ring body; The wall body of the body is fixedly connected, and the end with a larger diameter of the ring cover is fixedly connected with the outer package of the soft pack power battery, and the puncture part is contained in the ring cover; and the ring cover, the connecting ring, the ring body, and the ring cover are coaxially arranged; The waterproof and breathable membrane is arranged in the ring body; the gas one-way valve is arranged in the ring cover to prevent external air from entering the pouch battery. The invention greatly reduces the risk of liquid leakage from the soft pack power battery after the internal pressure of the power battery increases, and improves the use safety of the power battery.
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Description

technical field

[0001] The invention relates to the field of power soft pack power batteries, in particular to a puncture gas guide pressure relief valve for soft pack power batteries. Background technique

[0002] There are power batteries of various structures, including square aluminum shell power batteries, cylindrical steel shell power batteries, and plastic-encapsulated soft pack power batteries. Because the mass of the plastic-encapsulated soft-packaged lithium-ion battery accounts for the smallest proportion of the total mass of the cell, and its ancillary facilities also account for the smallest mass, the plastic-sealed soft-packaged lithium-ion battery has the largest specific energy among the above three battery forms. Soft-pack batteries can achieve greater specific energy and energy density more easily. The outer packaging of the pouch battery is a three-layer aluminum-plastic film laminated with nylon-aluminum-PP, and the sealing of the packaging material is d...

Claims

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