Method for locating laminate type battery pole piece

A positioning method and stacked technology, applied in battery electrodes, primary batteries, electrode manufacturing, etc., can solve the problems of battery energy density improvement, battery performance deterioration, battery space occupation, etc., to achieve improved energy density, simple operation, The effect of good positioning

Inactive Publication Date: 2008-06-25
SHANGHAI BYD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can obtain a good positioning effect, but the method is relatively cumbersome to operate, and the adhesive will also occupy part of the space of the battery, so

Method used

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  • Method for locating laminate type battery pole piece
  • Method for locating laminate type battery pole piece
  • Method for locating laminate type battery pole piece

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1

[0018] This embodiment takes the pole piece positioning of a laminated lithium ion battery as an example to illustrate the pole piece positioning method provided by the present invention.

[0019] 1. First, prepare the positive electrode sheet and the negative electrode sheet according to the following method.

[0020] (1) Preparation of positive electrode sheet

[0021] 1000 grams of positive active material LiCoO 2 , 30 grams of binder PVDF and 50 grams of conductive agent acetylene black are added to 600 grams of solvent NMP, and then stirred in a vacuum mixer to form a stable and uniformly dispersed positive electrode slurry. The slurry was uniformly intermittently coated on both sides of a wide aluminum foil (with a width of 500 mm and a thickness of 20 microns), then dried at 120°C, and rolled on a rolling mill to a thickness of 120 microns. Using a punching machine to punch out a positive electrode sheet with a length of 200 mm, a width of 150 mm, and a t...

Example Embodiment

[0031] Example 2

[0032] This embodiment takes the pole piece positioning of a laminated lithium ion battery as an example to illustrate the pole piece positioning method provided by the present invention.

[0033] 1. Prepare 1000 batteries according to the method described in Example 1, and measure the thickness of the prepared batteries with a vernier caliper. The average thickness of the batteries is 43 mm.

[0034] 2. Respectively locate the pole pieces in 1000 cells, the positioning method is as follows:

[0035]Choose two smooth steel plates 250 mm long, 200 mm wide, and 30 mm thick as the pressing plates. Place one of the pressing plates on a flat workbench. Place the battery core on the pressing plate and make the long sides of the battery core and the pressing plate. The long side of the cell is parallel, the short side of the cell is parallel to the short side of the pressure plate, so that the cell is in full contact with the pressure plate, and another pressure plate ...

Example Embodiment

[0037] Example 3

[0038] This embodiment takes the pole piece positioning of a laminated lithium ion battery as an example to illustrate the pole piece positioning method provided by the present invention.

[0039] 1. Prepare 1000 batteries according to the method described in Example 1, and measure the thickness of the prepared batteries with a vernier caliper. The average thickness of the batteries is 43 mm.

[0040] 2. Respectively locate the pole pieces in 1000 cells, the positioning method is as follows:

[0041] Choose two smooth steel plates 250 mm long, 200 mm wide, and 30 mm thick as the pressing plates. Place one of the pressing plates on a flat workbench. Place the battery core on the pressing plate and make the long sides of the battery core and the pressing plate. The long side of the cell is parallel, the short side of the cell is parallel to the short side of the pressure plate, so that the cell is in full contact with the pressure plate, and another pressure plate...

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Abstract

The invention provides a polar piece positioning method of a stack-up type battery; wherein, the method comprises the steps that the pressure vertical to the plane is uniformly applied to one plane or two planes of the electric core parallel to the polar piece. When the polar piece positioning method provided by the invention is adopted to position the polar piece, the good positioning of the polar piece can be realized, and the positioned electronic core occupies the less space of the battery, and the energy density of the battery is enhanced. In addition, the operation of the polar piece positioning method provided by the invention has the advantages is simple, and the invention is easy to be implemented.

Description

technical field [0001] The invention relates to a stacked battery, in particular to a method for positioning the pole pieces of the stacked battery. Background technique [0002] The preparation method of the laminated battery is as follows: the positive electrode sheet, the separator and the negative electrode sheet are stacked together alternately or the negative electrode sheet, the separator and the positive electrode sheet are stacked together to form a cell, and then the cell is put into the battery case to make a cell. into a battery. Since batteries with a stacked structure are suitable for the production of batteries of various types and capacities, batteries with this structure have been widely used, such as in the field of lithium-ion secondary batteries. Since the laminated battery is formed by interlacing the positive electrode, the separator and the negative electrode, the battery of this structure involves the positioning of the electrode in the battery. If t...

Claims

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Application Information

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IPC IPC(8): H01M10/40H01M10/04H01M6/00H01M4/04H01M4/139
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 许教练顾洪驰
Owner SHANGHAI BYD
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