A two-way negative pressure forming needle bed

Abstract

The invention discloses a two-way negative pressure forming needle bed, which comprises: a cabinet assembly and a power supply assembly; the cabinet assembly is formed by stacking a plurality of storey layers, and the storey layer includes: a bottom plate assembly; an upper plate arranged above the bottom plate assembly Components; the middle plate component that is movably arranged between the bottom plate component and the upper plate component; the negative pressure component that is set on the upper plate component and used to form the battery; the negative pressure component is set as a double negative pressure component, and includes: negative pressure The cup module and the negative pressure manifold connected with the negative pressure cup module; the negative pressure cup module, the negative pressure manifold and the preset negative pressure control system form a double negative pressure loop. The invention adopts double negative pressure circuits to form the battery, and forms a uniform, stable and dense SEI film on the negative electrode of the lithium ion battery under the negative pressure environment, so that the performance of the battery is more stable and the quality of the battery is improved.

Description

technical field [0001] The invention relates to the technical field of lithium battery formation technology, in particular to a double-path negative pressure formation needle bed. Background technique [0002] At present, with the widespread application of square aluminum-case lithium-ion batteries in the new energy power industry, the new energy industry has stricter high standards for the quality and consistency of square aluminum-case batteries. [0003] The single-circuit negative pressure forming equipment can improve the performance of the battery, so in the prior art, the single-circuit negative pressure forming equipment is basically used for the formation treatment of the battery. However, due to the unstable state of the electrolyte during the formation process, the single negative pressure cannot realize the independent negative pressure value, and it is difficult to extract the exhaust gas generated in the battery during the formation process, which seriously aff...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a two-way negative pressure forming needle bed in view of the above-mentioned defects of the prior art, aiming at solving the problem that the single-way negative pressure forming equipment in the prior art cannot achieve independent negative pressure value, and It is difficult to extract the waste gas generated in the battery during the formation process, etc.

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