Lithium ion cell lamination equipment and process

A lithium-ion and battery technology, applied in the field of lithium-ion battery stacking equipment and stacking technology, can solve the problems of reduced stacking accuracy, equipment cost and efficiency, and low placement efficiency, so as to reduce design complexity, The effect of improving production efficiency and yield rate

Pending Publication Date: 2021-10-01
GAC AION NEW ENERGY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the Z-type lamination process involves complex Z-type diaphragm running, pole piece grabbing and other actions, the overall design of the equipment is complex, and many mechanical arms and roller control mechanisms are required, the equipment cost is high, and the Z-type lamination The efficiency of grabbing and placing process pole pieces is low, and the precision controllability is poor
In the bag-making lamination process, due to the gap between the pole piece and the diaphragm bag in the bag-making process, the movement of the pole piece will lead to a decrease in the final lamination accuracy
In addition, the bag-making process still needs to carry out the grabbing action of the bag-type pole piece and the pole piece, so there are still problems to be solved in terms of equipment cost and efficiency

Method used

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  • Lithium ion cell lamination equipment and process
  • Lithium ion cell lamination equipment and process
  • Lithium ion cell lamination equipment and process

Examples

Experimental program
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Effect test

Embodiment 1

[0036] The invention provides a lithium-ion cell stacking device, which includes a stacking module, a cutting module 4, a transport module, a stacking and bonding module, and a hot-pressing module.

[0037] Specifically, the stacking module arranges the positive electrode sheets 1 and the negative electrode sheets 3 at intervals and heat-presses them on one side of the separator 2 to form a continuous stack, as figure 1 shown. Among them, the positive electrode sheet 1 and the negative electrode sheet 3 are hot-pressed on the diaphragm 2 through a hot-pressing process, the hot-pressing time is 1-100min, the hot-pressing temperature is 60-200°C, and the hot-pressing pressure is 0.1-1000MPa; the diaphragm 2 is treated with a surface coating process , the glue used for surface coating includes polyvinylidene fluoride, polypropylene carbonate, polysiloxane, polyethylene oxide, polyphthalamide, polytrimethylene carbonate, polyvinyl carbonate and polycarbonate One or more of vinyl ...

Embodiment 2

[0043] According to the method of embodiment 1, lithium-ion cell stacking equipment and stacking process are provided, and only the differences are listed below:

[0044] In the stacking module, the positive electrode sheet 1 is hot-pressed on one side of the separator 2, and the negative electrode sheet 3 is hot-pressed on the corresponding position on the other side of the separator 2 to form a continuous stack, such as Figure 6 shown. The unit stack 16 made by the cutting module 4 includes the negative electrode sheet 3, the separator 2 and the positive electrode sheet 1 in order from bottom to top, such as Figure 7 shown. The stacking laminating module arranges the separators 2 and the unit stacks in a stacked form at intervals to obtain neatly arranged multi-layer stacked cells 15 . Specifically, first, as Figure 7 As shown, the lamination unit of the stacking lamination module laminates a diaphragm 2 to the upper surface of the unit stack 16 on the transport module...

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Abstract

The invention discloses lithium ion cell lamination equipment and process. The lithium ion cell lamination equipment comprises a stacking module, a cutting module, a transportation module, a stacking and laminating module and a hot pressing module, wherein the stacking module is used for arranging a positive plate and a negative plate at intervals and hot-pressing the positive plate and the negative plate on one side surface of a diaphragm to prepare a continuous stack, or hot-pressing the positive plate on one side surface of the diaphragm and hot-pressing the negative plate on the corresponding position of the other side surface of the diaphragm to form the continuous stack; the cutting module is used for cutting the continuous stack into unit stacks; the transport module transports the unit stacks in an assembly line manner; the stacking and laminating module is used for preparing the unit stacks and the diaphragms into a plurality of layers of stacked battery cells which are arranged in order in a stacking form; and the hot-pressing module is used for hot-pressing the multiple layers of stacked battery cells to prepare the lithium ion battery cell. The equipment is simple in design, low in equipment cost and high in lamination precision, and the preparation efficiency and the yield of the lithium ion battery cell are effectively improved.

Description

technical field [0001] The invention relates to the field of energy storage devices, in particular to a lithium-ion cell stacking equipment and a stacking process. Background technique [0002] Due to its high operating voltage, high energy density, long cycle life, and no memory effect, lithium-ion batteries have become mainstream energy storage batteries in consumer electronics, electric vehicles, and other application scenarios. At present, industries such as consumer electronics products and electric vehicles have ushered in a stage of rapid growth, and the demand for lithium-ion batteries has increased sharply. However, at present, due to the complicated lithium-ion production process and various procedures, the production efficiency of lithium-ion batteries is low, and the yield of products is low. Among the many processes in the production of lithium-ion batteries, the cell assembly process is particularly important, which is mainly divided into lamination assembly p...

Claims

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Application Information

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IPC IPC(8): H01M10/04H01M10/0585
CPCH01M10/0585H01M10/0404H01M10/0413Y02P70/50Y02E60/10
Inventor 常毅梅骜
Owner GAC AION NEW ENERGY AUTOMOBILE CO LTD
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