Thermal compounding manufacturing process of battery cell

A technology of thermal compounding and battery cells, which is applied in sustainable manufacturing/processing, manufacturing of electrolyte batteries, circuits, etc., can solve the problems of inability to guarantee the accuracy of positive and negative electrodes, consume a lot of time, and lack of alignment, so as to improve thermal compounding The effect of manufacturing process, reducing short-circuit flammability, and improving lamination efficiency

Active Publication Date: 2021-12-10
SHENZHEN XING GRAIN AUTOMATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the unit body manufacturing process of this manufacturing process, the unit body is made using a blind stacking method, that is, the positive and negative electrodes are synchronously transported in a straight line and laminated, and the positive and negative electrodes arranged up and down lack alignment, which cannot To ensure the accuracy of the positive and negative electrodes in the unit, at the same time, the current situation is that if the alignment process is added to the positive and negative electrodes arranged above and below each piece, it will take the same time

Method used

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  • Thermal compounding manufacturing process of battery cell
  • Thermal compounding manufacturing process of battery cell
  • Thermal compounding manufacturing process of battery cell

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] Example 1: Such as Figure 1 to 3 As shown, the technical solution taken in the first embodiment of the present invention is as follows: a battery heat composite formation process, including the following process steps:

[0042] S1, the first pole piece is made: the first pole belt with a polar structure, and the polar sheet is formed, and the polar sheet is formed.

[0043] S2, the second pole piece is made: the second pole with a strip structure opposite to the first polarity of the first polarity in step S1, the polarized second pole piece is formed after the pole is cut. ;

[0044] S3, pole bag: step S1 or step S2 single-sheet first pole or second pole piece during line S1 or in the straight line transmission, the front side is synchronously covered with the strip-shaped diaphragm, and the diaphragms on both sides are respectively The positive and negative side wall thermal composite bonding of a pole or the second pole piece, the positive and back side diaphragm extends...

Example Embodiment

[0067] Example 2: Such as Figure 4 As shown, for the schematic structural flow of the bag process of the second embodiment of the present invention, the present embodiment has the same components as the production line of the first embodiment, and the difference is that the production line of the present embodiment will be the edge of the heat composite into a bag and the bag process. After the sequential disc is completed, the surface heat composite step is completed, the diaphragm is cut in the middle distance between adjacent two poles, and after the cut is completed, the adhesive roller 6 will be passed through the diaphragm on the upper and lower sides of the upper and lower sides of the electrode. The contour performs edges along the hot composite into bags. Example 1 The process was first cut along the heat composite, and then the continuous diaphragm was stressed. Since the continuous diaphragm is tensioned, there is a stress in the edge, and therefore, the internal stress...

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Abstract

The invention discloses a thermal compounding manufacturing process of a battery cell. The thermal compounding manufacturing process comprises the following process steps that: a pole piece is manufactured, namely, single pole pieces are formed after a pole piece belt with a belt-shaped structure is subjected to pole lug forming and pole piece cutting; pole piece bags are manufactured, namely, a single-sheet-shaped first pole piece or a single-sheet-shaped second pole piece is bonded to the front side wall and the back side wall through diaphragms on the two sides in a thermal compounding mode respectively, diaphragms on the front side and the back side extend to the outer side of the first pole piece or the outer side of the second pole piece and then are bonded to form a continuous pole piece bag, and the continuous pole piece bag is cut into single pole piece bags; and a battery cell is formed, namely, the single pole pieces and the single pole piece bags are mutually staggered and overlapped to form a battery cell. According to the invention, the problem of wrinkling of the diaphragms is solved, the position precision between the positive and negative pole pieces is ensured, the single diaphragm alignment process of the traditional lamination is simplified by adopting diaphragms larger than the pole pieces, the lamination efficiency is effectively improved, combustion caused by short circuit is reduced, and the safety coefficient of the battery is improved.

Description

technical field [0001] The invention relates to the field of lithium-ion batteries, in particular to a thermal compound manufacturing process for electric cores in the field of lithium-ion power batteries. Background technique [0002] As the country vigorously promotes the development of new energy, the demand for lithium-ion power batteries in all walks of life is increasing day by day. In the composition structure of lithium-ion power batteries, the battery core is its core component. become. The structure of the battery cell includes multiple positive and negative plates stacked up and down staggered, and the positive and negative plates are isolated and insulated by a diaphragm. [0003] At present, the manufacturing process of the battery cell includes two methods of strip lamination and single-piece lamination according to the different diaphragm insertion process, that is, continuous diaphragm and single-piece diaphragm lamination are used for lamination. Among the...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/0525H01M50/466
CPCH01M10/058H01M10/0525H01M50/466Y02E60/10Y02P70/50
Inventor 宾兴刘成彭强唐延第徐骏谭振涛
Owner SHENZHEN XING GRAIN AUTOMATION CO LTD
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