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A battery pole piece cutting method and a battery core assembly method comprising the method

An assembly method and battery cell technology, applied in electrode manufacturing, secondary battery, secondary battery manufacturing, etc., can solve the problems of complicated assembly process of laminated battery core, inability to balance speed and performance, poor product consistency, etc. Degeneracy and continuity, reducing equipment automation costs, and the effect of low equipment costs

Active Publication Date: 2019-12-27
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] Aiming at the inadequacies of the existing stacked battery cell assembly process in terms of speed and performance, one purpose of the present invention is to solve the problems of complicated stacked battery cell assembly process, high automation cost, poor product consistency, difficult production control and low assembly efficiency. technical issues

Method used

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  • A battery pole piece cutting method and a battery core assembly method comprising the method
  • A battery pole piece cutting method and a battery core assembly method comprising the method
  • A battery pole piece cutting method and a battery core assembly method comprising the method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] After coating, the pole piece film roll before slicing (take the positive pole piece film roll as an example, and the negative pole piece film roll is treated similarly) as figure 1 As shown, the schematic diagram of the battery cell assembly to be completed is shown in image 3 shown.

[0075] The specific steps of the battery pole piece cutting method are as follows:

[0076] a) Pole film roll design

[0077] Such as Figure 7 shown, according to image 3 Design the cutting area 72, the reserved area 71 (including the coating area and the upper tab blank area), and the connecting area 73 on the pole piece film roll, wherein the shape of the reserved area is that the pole piece is on the pole piece. The shape that is periodically arranged on the film roll, and the part where the adjacent pole pieces are connected is called the connection area, and the cutting area is the shape of the area to be cut after removing the reserved area on the pole piece film roll;

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Embodiment 2

[0087] After coating, the pole piece film roll before slicing (take the positive pole piece film roll as an example, and the negative pole piece film roll is treated similarly) as figure 1 As shown, the schematic diagram of the battery cell assembly to be completed is shown in image 3 shown.

[0088] The battery cores were assembled in the same manner as in Example 1, except that laser cutting was used instead of die-cutting.

Embodiment 3

[0090] After coating, the pole piece film roll before slicing (take the positive pole piece film roll as an example, and the negative pole piece film roll is treated similarly) as figure 1 As shown, the schematic diagram of the battery cell assembly to be completed is shown in image 3 shown.

[0091] The battery cores were assembled in the same manner as in Example 1, except that a circular knife die-cutting method was used instead of die-cutting to remove waste.

[0092] Wherein, the structure of the die-cutting of the circular knife is as Figure 12 As shown, wherein, the upper roll is a knife roll 1, and the knife roll is provided with a knife mold 2, and the knife mold 2 is arranged at intervals according to the above-mentioned pole piece film roll design, and the shape of the knife mold 2 is the same as that in Example 1. The cutter molds have the same shape, and brushes or rubber felts can be installed at the intervals to clean the fracture and surface. The middle of ...

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Abstract

The invention relates to a battery pole piece cutting method and a battery core assembly method including the method, in particular, the present invention relates to a laminated battery pole piece cutting method and a battery core assembly method including the method. The battery core is composed of a positive electrode sheet, a separator, and a negative electrode sheet stacked in sequence, and the blank areas of the positive and negative electrode sheets are welded to tabs to lead out conductive terminals. The pole piece cutting method and battery core assembly method of the present invention improve the traditional lamination process, realize degeneracy and continuity of the process, greatly reduce equipment automation costs, production costs, improve production efficiency, and increase product yield and consistency. sex.

Description

technical field [0001] The present invention relates to a battery pole piece cutting method and a battery core assembly method including the method, in particular, the present invention relates to a battery pole piece cutting method for laminated battery cells and a battery core assembly including the method method. Background technique [0002] Lithium-ion battery is an ideal chemical energy source, which has the advantages of small size, high voltage, high specific energy, long charge and discharge life, no memory effect, little environmental pollution, fast charging, and low self-discharge rate. With the growth of the electric vehicle market, the supply of power lithium batteries with high-rate discharge performance is in short supply, and the accuracy and speed of battery cell assembly are one of the main constraints. [0003] Including lithium-ion batteries, the active material is made into a diaphragm-shaped battery core structure, both of which are sheet-shaped oppos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M10/04H01M10/0525H01M10/0583
CPCH01M4/04H01M10/0431H01M10/0525H01M10/0583Y02E60/10Y02P70/50
Inventor 李铮铮朱健桦吕忱蒋浩民张丕军
Owner BAOSHAN IRON & STEEL CO LTD
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