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Manufacturing apparatus and manufacturing method of strip electrode

A strip-shaped electrode and manufacturing device technology, applied in electrode manufacturing, electrode rolling/calendering, battery electrodes, etc., can solve the problems of collector foil bending, non-forming part stretching, etc., and achieve the effect of suppressing wrinkles

Active Publication Date: 2021-09-17
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in this pressing step, although the formed part of the current collector foil where the electrode mixture layer is formed is stretched, the non-formed part is not stretched, so the current collector foil is bent in this state.

Method used

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  • Manufacturing apparatus and manufacturing method of strip electrode
  • Manufacturing apparatus and manufacturing method of strip electrode
  • Manufacturing apparatus and manufacturing method of strip electrode

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Experimental program
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Effect test

no. 1 Embodiment approach

[0040]

[0041] First, refer to figure 1 , figure 2 The configuration of the strip electrode manufactured by the strip electrode manufacturing apparatus according to the first embodiment will be described. figure 1 It is a plan view of the strip electrode 40 . figure 2 Yes figure 1 The II-II sectional view of , which is also described later image 3 Section II-II.

[0042] Furthermore, figure 1 , figure 2 The right-hand xyz orthogonal coordinates shown in the other drawings are convenient for explaining the positional relationship of the constituent elements. Generally, the positive z-axis is the vertical direction, and the xy-plane is the horizontal plane, which are common to all figures.

[0043] The strip electrode 40 is, for example, a strip electrode for positive electrodes or negative electrodes used in lithium ion secondary batteries and the like. like figure 1 , figure 2 As shown, the strip electrode 40 includes a collector foil 41 and an electrode mixt...

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PUM

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Abstract

The invention provides a manufacturing device and a manufacturing method of a strip electrode. The manufacturing apparatus of the strip-shaped electrode includes a stretching roll and a pair of pressing rolls for pressing the strip-shaped current collector foil with the electrode mixture layer formed along the longitudinal direction in the thickness direction of the electrode mixture layer, The stretching roll stretches the non-formed portion of the current collector foil where the electrode mixture layer is not formed and the current collector foil is exposed at both ends in the width direction of the current collector foil. The stretching roll has a first roll and a pair of second rolls, the first roll is opposite to the electrode mixture layer formed on the current collector foil, and the pair of second rolls is arranged at both ends of the first roll in the axial direction. The non-formed portion faces each other, and the central axis of the first roll is shifted in a direction away from the stretched current collector foil with respect to the central axis of the pair of second rolls.

Description

technical field [0001] The present invention relates to a manufacturing apparatus and a manufacturing method of a strip electrode. Background technique [0002] For example, a strip-shaped electrode used in a lithium ion secondary battery or the like has a structure in which an electrode mixture layer is formed along the longitudinal direction on the surface of a strip-shaped current collector foil. Here, the current collector foil is composed of a formed portion where the electrode mixture layer is formed, and a non-formed portion where the current collector foil is exposed at both ends in the width direction. [0003] As disclosed in Japanese Patent Application Laid-Open No. 2014-116141, in such an apparatus and method for producing a strip electrode, the current collector foil on which the electrode mixture layer is formed is pressed in the thickness direction. By such a pressing step, the electrode mixture layer can be compressed, and the electrode density of the produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1391H01M4/1393H01M4/1395H01M4/1397H01M4/04H01M4/139
CPCH01M4/0435H01M4/139H01M2004/025H01M4/0404Y02E60/10
Inventor 蛭川智史高野敬介
Owner TOYOTA JIDOSHA KK