Device for detecting gas production rate of cylindrical lithium ion battery and application method thereof

Abstract

The invention discloses a device for detecting the gas production rate of a cylindrical lithium ion battery and an application method thereof and aims at solving the technical problem that the gas production rate of the cylindrical lithium ion battery is efficiently and accurately detected. The device for detecting the gas production rate of the cylindrical lithium ion battery comprises a base and an upper cavity component, wherein the base and the upper cavity component form a closed cavity; the cylindrical lithium ion battery is fixed on the base; an acupuncture component is arranged at the top of the upper cavity component; the acupuncture component is connected with the inner wall of the upper cavity component by virtue of an upper cavity component sealing pad; an air exhaust PP pipe and a sealing oil liquid column PP pipe are arranged on the side wall of the upper cavity component; the air exhaust PP pipe and the sealing oil liquid column PP pipe are respectively provided with a valve; a pipe wall hole is also formed in the air exhaust PP pipe; a rubber plug is arranged in the pipe wall hole; and the sealing oil liquid column PP pipe is a transparent pipe provided with an oil liquid column and a blind end at the tail end. The device disclosed by the invention has the advantages that shell walls of the base and the upper cavity component are made from a stainless steel material respectively, small in deformation, resistant to electrolyte corrosion, reusable and long in service life.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and relates to a device and a method for detecting gas production of a cylindrical lithium ion battery. Background technique [0002] The production process of cylindrical lithium-ion batteries is mature, with high degree of automation, high production efficiency and low cost, and is currently widely used. With the rapid development of electronic technology, people have higher and higher requirements for battery performance, especially the improvement of batch stability and consistency of lithium-ion batteries, which requires strict process control in the production of lithium-ion batteries, but in There are many factors that affect the process control in the production process of lithium-ion batteries. It is very difficult for most manufacturers to implement strict on-site control of human, machine, material, method and environment. This requires not only reasonable planning in adv...

AI Technical Summary

Problems solved by technology

When dissecting the battery, the size of the opening of the clamp to open the steel shell is inconsistent, and the inconsistency of the clamping speed directly affects the sound of gas discharge inside the lithium-ion battery and the amount of electrolyte sprayed out. The gas production of the battery is not accurate and rigorous when dissecting the battery.

[0004] CN 2921823Y discloses a detection device for internal gas production of a lithium-ion battery. The device includes a cavity and a push-pull rod. The push-pull rod and the side surfaces of the cavity are respectively provided with scales. The detection cell is put into the cavity. When the core generates gas, the gas in the sealed cavity pushes the baffle plate connected with the push-pull rod to move up and down, so as to achieve the purpose of detecting gas, but this patent cannot realize the internal communication between the battery cavity and the battery cell when testing lithium-ion finished batteries, only the The battery opening is placed in the cavity to charge and discharge to test the gas production of the battery, which is not suitable for random inspection of the gas production of sealed lithium-ion batteries that have been produced.

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