Power lithium battery top cover electrode column sealing connection and explosion-proof device and manufacturing method thereof

Abstract

The invention discloses a power lithium battery top cover electrode column sealing connection and an explosion-proof device and a manufacturing and assembling method thereof. Teflon sealing ring with conical surface 5, electrode column with conical surface 6, injection molded parts 7, explosion-proof locking screw 8, Teflon sealing washer 9, Teflon sealing washer 10, Teflon explosion-proof film 11, explosion-proof Valve body 12, circumferential laser welding 13. An electrode column with a tapered surface is designed, and the Teflon sealing ring is elastically deformed in the radial direction by using the tapered surface. When the lock nut 2 is locked, the purpose of reliable sealing of the plane and the hole is achieved. The explosion-proof device selects Teflon with excellent performance as the sealing gasket and explosion-proof membrane, and the threaded connection is compressed. The invention has the advantages of excellent sealing performance, strong corrosion resistance, aging resistance, small pressure relief damage, wide high and low temperature impact range, simple manufacturing and assembly process, stable and reliable explosion-proof safety performance, and the like.

Description

technical field [0001] The invention belongs to the field of power lithium batteries, and relates to a power lithium battery top cover electrode column sealing connection and an explosion-proof device and a manufacturing method thereof. Background technique [0002] Low-carbon economy is the development trend of the global economy. China is also an active advocate of low-carbon economy. As an important pillar of low-carbon economy, the electric vehicle industry has immeasurable potential. Frost & Sullivan, a world-renowned growth consulting company, believes that the next ten years will be a critical period for China's auto industry to transform from fossil fuels to electric drive powertrains, and it will be a period of major opportunities for local electric drive powertrain suppliers. The power lithium battery is the core component of the electric drive powertrain, and its cost accounts for 50%-70% of the powertrain cost. The power lithium battery industry is facing major d...

AI Technical Summary

Problems solved by technology

Its purpose is to solve the problem of poor airtightness of the electrode column seal, weak resistance to electrolyte corrosion of the sealing material, weak aging resistance, narrow range of high and low temperature impact resistance, poor airtightness of the explosion-proof device, low reliability and safety, and complicated manufacturing and assembly processes. , high quality defect rate and other issues

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