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Processing method for lithium ion cell and processing device for composite battery electrode sheet

A technology for battery pole pieces and composite batteries, which is applied in the processing of lithium-ion batteries and processing devices for composite battery pole pieces. It can solve problems such as low production efficiency and easy generation of burrs, and achieve the goal of reducing equipment investment and reducing burrs. Probability, the effect of simplifying production equipment

Inactive Publication Date: 2019-08-09
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production efficiency of the lamination process is low, and there is displacement between layers, and the positive and negative electrodes involved in the lamination are cut single pieces, and burrs are prone to occur during the processing

Method used

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  • Processing method for lithium ion cell and processing device for composite battery electrode sheet
  • Processing method for lithium ion cell and processing device for composite battery electrode sheet
  • Processing method for lithium ion cell and processing device for composite battery electrode sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] see Figure 1-3 , when this embodiment is in use, place the battery positive roll on the pole piece unwinding roller 1, and place the two rolls of battery separator on the first separator unwinding roller 21 and the second separator unwinding roller 22 respectively , in this embodiment, the diaphragm adopts a glue-coated diaphragm, and the side of the diaphragm close to the pole piece is coated with a glue layer. The thickness of the glue layer is 0.5 μm, and the glue layer is oil-based PVDF. Roller 1 pulls out and walks around the first guide roller 31, then passes through the fourth guide roller 34 and the fifth guide roller 35, and then the first diaphragm and the second diaphragm are unwound from the first diaphragm respectively. 21 and the second diaphragm unwinding roller 22 are pulled out and passed around the second guide roller 32 and the third guide roller 33 respectively, and then the first diaphragm and the second diaphragm are attached to the upper and lowe...

Embodiment 2

[0044] see figure 1 , Figure 4-5 In this embodiment, the negative pole piece of the battery is placed on the pole piece unwinding roller 1, the separator is glued with water-based AFL with a thickness of 2 μm, and the temperature of the first pressing roller 41 and the second pressing roller 42 is 100°C , the pressure of the first pressure roller 41 and the second pressure roller 42 is 3000Kg, and the rest are the same as in Example 1, and then the negative electrode sheet coated by the separator on both sides can be produced, such as Figure 4 , Figure 5 As shown, the application of the negative electrode sheet covered by the separator processed in this embodiment in the production of wound electric cores and laminated electric cores.

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Abstract

The invention discloses a processing method for a lithium ion cell. The processing method comprises the following steps: a battery diaphragm with a continuous structure is adhered on the two sides ofa continuous battery electrode sheet so as to form a continuous composite battery electrode sheet covered with the diaphragm; a continuous composite battery positive electrode sheet and a continuous battery negative electrode sheet are bonded to form a composite battery positive electrode sheet-battery negative electrode sheet double-layer structure, and then the double-layer battery electrode sheet is wound; and the battery negative electrode sheet is sliced, the composite battery positive electrode sheet is bent into a Z shape and a sliced battery negative electrode sheet is placed on the inner side of each bending corner. A set of battery electrode sheet unwinding rollers and two sets of diaphragm unwinding rollers are arranged, and then the battery electrode sheets and the diaphragm are rolled and compounded by opposite rollers under the appropriate temperature and pressure so that the battery electrode sheets are covered by the diaphragm to form a continuous whole. The battery electrode sheet has a continuous structure so that the production cost is reduced and the quality of the battery is improved.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery production, in particular to a processing method for lithium-ion batteries and a processing device for composite battery pole pieces. Background technique [0002] Lithium-ion batteries have become the darling of the energy industry due to their high energy density, good cycle performance, long service life, safety and environmental protection, and no memory. Today, lithium-ion batteries have been successfully used in portable electronic products, electric vehicles, and aerospace fields, and have become a research hotspot in new energy materials. Lithium-ion batteries have both wound-type structures and stacked-sheet structures. [0003] The winding core of the wound battery is usually formed by winding the positive and negative pole pieces and the diaphragm after the tabs are formed by using a winding machine. The winding process involves the control of the tension of the diaphragm ...

Claims

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Application Information

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IPC IPC(8): H01M10/0587H01M10/058H01M10/0525
CPCH01M10/0525H01M10/058H01M10/0587Y02E60/10Y02P70/50
Inventor 朱亮吴诺杨玲玲张宏立
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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