Lithium battery drying process

A lithium battery and process technology, applied in drying, dryer, secondary battery and other directions, can solve the problems such as the inability to completely remove the moisture of the battery core and the reduction of battery performance, achieve large energy consumption, increase drying temperature, Efficient removal effect
CN109883143BActive Publication Date: 2021-11-05广西燚能新能源有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
广西燚能新能源有限公司
Publication Date
2021-11-05

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Abstract

The invention discloses a lithium battery drying process, which comprises a first baking step of putting a pole piece or a pole piece core into an oven for baking; an assembly step of winding the pole piece after the first baking step into a pole piece core, and install the pole piece core inside a battery case with an open end to make a semi-finished battery, or install the pole piece core after the first baking step into a battery with an open end The inside of the casing is used to make a semi-finished battery; in the second baking step, the semi-finished battery is put into an oven for baking. The lithium battery drying process disclosed in the present invention can efficiently remove the moisture inside the battery through the two-stage drying process, and does not need to greatly increase the drying temperature and prolong the baking time during the baking process, and will not damage the battery. Performance is negatively impacted without greater energy consumption.
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Description

technical field

[0001] The invention relates to the field of lithium battery manufacturing, in particular to a lithium battery drying process. Background technique

[0002] Inorganic lithium salt is an important component in the electrolyte of ion batteries. Since inorganic lithium salts encounter water, they will produce chemical reactions, which seriously affect the overall performance of the battery. Therefore, in the manufacturing process of lithium-ion batteries, the removal of moisture inside the battery is particularly important.

[0003] There is a baking process before the lithium-ion battery is injected, and a vacuum oven is used for baking to remove water. For cylindrical lithium-ion batteries with larger diameter and higher height (for example, diameter ≥ 18mm, height ≥ 65mm), it is generally used to prolong the baking time or increase the baking temperature to reduce the moisture inside the battery. There are some defects in this method, because after the batt...

Claims

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