Flexible-package cell negative pressure formation method

Abstract

The invention belongs to the field of battery technologies and particularly relates to a flexible-package cell negative pressure formation method. A constant-temperature box, a fixture module, a formation module and a vacuum pump are included, wherein the fixture module and the formation module are both contained in the constant-temperature box. The method comprises the steps that S1, cells are placed in the fixture module; S2, a movable component of the fixture module is adjusted to pressurize the cells; S3, one end of a pinhole vacuum pipeline is communicated with the output end of the vacuum pump, and the other end of the pinhole vacuum pipeline is inserted into the cells, so that the pinhole vacuum pipeline is communicated with the interior of each cell; and S4, hole positions, inserted into the cells, of the pinhole vacuum pipeline are packaged. Through the method, the battery cells can be subject to formation under negative pressure, the adverse influence of a gas generated in the formation process on cell formation is effectively avoided, and therefore formation quality and efficiency are improved.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a method for negative-pressure formation of soft-packaged batteries. Background technique [0002] In the manufacturing process of polymer lithium-ion batteries, the battery cells need to be formed, and the formation process directly affects the performance and quality of the battery. Therefore, in the battery manufacturing process, the formation process plays a vital role. [0003] In the prior art, the soft-packed lithium-ion cells produce gas when the formation is activated, but the gas can only be stored in the aluminum-plastic packaging film shell. When the gas reaches a certain amount, it will affect the contact of the pole pieces, thereby hindering the formation and reducing the formation. Effect. [0004] In summary, there are defects in related technologies, which need to be improved urgently. Contents of the invention [0005] The purpose of the presen...

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Problems solved by technology

[0003] In the prior art, the soft-packed lithium-ion cells produce gas when the formation is activated, but the gas can only be stored in the aluminum-plastic packaging film shell. When the gas reaches a certain amount, it will affect the contact of the pole pieces, thereby hindering the formation and reducing the formation. Effect

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