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Electrode manufacturing method and battery manufacturing method

A manufacturing method and electrode technology, applied in electrode manufacturing, secondary battery manufacturing, electrode rolling/calendering, etc., can solve problems such as electrode fracture and winding precision reduction, inability to greatly reduce tensile stress, and battery performance degradation

Active Publication Date: 2016-02-17
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the active material-containing layer of the electrode contains materials / components that may deteriorate at high temperatures and degrade battery performance, the heating temperature has to be limited.
As a result, the tensile stress cannot be greatly reduced within the application range of the heating temperature, and a stress several times higher than the tensile stress originally required for winding the electrode is required, causing concerns such as breakage of the electrode and reduction in winding accuracy.

Method used

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  • Electrode manufacturing method and battery manufacturing method
  • Electrode manufacturing method and battery manufacturing method
  • Electrode manufacturing method and battery manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0033] figure 1 It is a schematic diagram showing a pressing device, a guide roller device, and a winding device used in the manufacture of an electrode. figure 2 It is a schematic diagram showing the positional relationship between the guide roller and the strip-shaped electrode plate in the deflection correction process. figure 2 (a) is a top view of the belt-shaped pole plate traveling on the guide roller viewed from the guide roller side, figure 2 (b) is a cross-sectional view obtained by cutting the guide roller parallel to the rotation axis. image 3 (a) is a cross-sectional view obtained when a guide roller having a tapered shape (taper) is formed at a corner of the step portion is cut parallel to the rotation axis, image 3 (b) is expressed in image 3 (a) is a cross-sectional view of a state in which a belt-shaped electrode plate is disposed on a guide roller. Figure 4 (a) is a top view of the belt-shaped pole plate traveling on the guide roller viewed from th...

no. 2 Embodiment approach

[0060] According to the second embodiment, there is provided a method of manufacturing a battery including a positive electrode, a negative electrode, and a nonaqueous electrolyte. At least one of the positive electrode and the negative electrode is produced by the method of the first embodiment. Figure 5 It is a developed perspective view of a non-aqueous electrolyte battery manufactured by the method of the second embodiment. Figure 6 yes Figure 5 A partial exploded perspective view of the electrode group used in the shown battery.

[0061] Figure 5 The shown battery is a sealed prismatic non-aqueous electrolyte secondary battery. The nonaqueous electrolyte secondary battery includes an exterior can 1 , a cap 2 , a positive electrode output terminal 3 , a negative electrode output terminal 4 , and an electrode group 5 . Such as Figure 5 As shown, the exterior can 1 is in the shape of a square cylinder with a bottom, and is formed of metal such as aluminum, aluminum a...

no. 3 Embodiment approach

[0075] According to the third embodiment, it is possible to provide an electrode manufacturing method including preparation of a strip-shaped electrode plate, extrusion molding, first warp correction, drying, and second warp correction.

[0076] Figure 8 It is a schematic diagram showing a pressing device, a guide roller device, and a first winding device used in the production of an electrode. Figure 9 It is a schematic diagram showing the positional relationship between the guide roller and the strip-shaped electrode plate in the deflection correction process. Figure 9 (a) is a top view of the belt-shaped pole plate traveling on the guide roller viewed from the guide roller side, Figure 9 (b) is a cross-sectional view obtained by cutting the guide roller parallel to the rotation axis. Figure 10 (a) is a cross-sectional view obtained when the tapered guide roller is formed at the corner of the stepped portion in parallel to the rotation axis, Figure 10 (b) is express...

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PUM

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Abstract

According to the embodiment, it is possible to provide a method of manufacturing an electrode including a step of applying tension. The electrode includes: a belt-shaped current collector; an exposed portion of the current collector formed on at least one long side of the belt-shaped current collector, and no active material-containing layer exists on both sides; and an active material-containing layer formed on the belt-shaped current collector. At least a part of the current collector other than the exposed portion of the current collector. In the step of applying tension, the roll having a step protruding from the circumferential surface and a recess adjacent to the step is arranged so that the exposed portion of the current collector is located in the step, and the active material-containing layer is located in the recess, and is formed in a belt shape. Tension is applied in the longitudinal direction of the current collector.

Description

technical field [0001] Embodiments of the present invention relate to a method of manufacturing an electrode and a method of manufacturing a battery. Background technique [0002] In addition to being used in existing small electronic devices, batteries have also been used as power sources for hybrid electric vehicles in recent years. Accordingly, storage batteries having high capacity, long cycle life, and fast chargeability are required. In order to pack as much active material as possible into a limited battery, the electrodes are also more densely compressed. [0003] When producing an electrode, the active material-containing slurry is coated on a current collector made of, for example, metal foil and dried, and the coated portion is compressed by a roll press or the like. The base current collector of the coated portion that was compressed was also stretched by plastic deformation, but the uncoated portion that was not coated with the active material-containing slurr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/139H01M4/66H01M10/058
CPCH01M4/0404H01M4/139H01M4/661H01M4/04H01M4/0433H01M10/0431Y10T29/49108H01M4/0435Y02E60/10Y02P70/50H01M10/058
Inventor 小林隆史森岛秀明中畑政臣森和彦植松育生
Owner KK TOSHIBA