BATTERY MANUFACTURING METHOD AND BATTERY

• US 20190319296A1
• Filed: 04/05/2019
• Published: 10/17/2019
• Est. Priority Date: 04/12/2018
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: SUZUKI, Yuzo
• Granted Patent: US 10,978,732 B2
• Time in Patent Office: Days
• CPC Class Codes: H01M 10/0404 Machines for assembling batteries
• CPC Class Codes: H01M 10/049 Processes for forming or storing electrodes in the battery container
• CPC Class Codes: H01M 50/533 characterised by the shape of the leads or tabs
• CPC Class Codes: H01M 50/54 Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

An integrated plate is configured with a positive electrode plate, a negative electrode plate, and a separator integrated in a card-like shape. The integrated plate comprising a storage part, a positive current collecting part, and a negative current collecting part is formed in an integrated plate manufacturing process. An electrode laminated body is manufactured in a piling process by piling a plurality of the integrated plates such that the storage parts, the positive and negative current collecting parts are overlapped together seen from upper position respectively The integrated plate manufacturing process includes a raising step of forming a raised part raised from other parts by partly bending or curving in at least a coinciding one of the positive current collecting part and the negative current collecting part for the plurality of the integrated plates, and the raised parts are overlapped one another seen from upper position in the piling process.

Claims

1. A manufacturing method of a battery comprising an electrode laminated body encased in an outer casing, the electrode laminated body being formed by piling a positive electrode plate, a negative electrode plate, and a separator, including

an integrated plate manufacturing process of manufacturing an integrated plate configured with the positive electrode plate, the negative electrode plate, and the separator which are integrated in a card-like shape, the integrated plate comprising a storage part including the positive electrode plate, the negative electrode plate, and the separator, a positive current collecting part including the positive electrode plate only, and a negative current collecting part including the negative electrode plate only, and

a piling process of manufacturing the electrode laminated body by piling a plurality of the integrated plates such that the storage parts, the positive current collecting parts, and the negative current collecting parts are overlapped together seen from upper position respectively, wherein

the integrated plate manufacturing process includes a raising step of forming a raised part raised from the other part by partly bending or curving in at least a coinciding one of the positive current collecting part and the negative current collecting part for the integrated plate, and

a plurality of the raised parts are overlapped one another seen from upper position in the piling process.

2. The battery manufacturing method according to claim 1, wherein the method includes a terminal connection process of connecting a terminal connection member for connecting an external terminal to an overlapped portion of the raised parts after the piling step.

3. The battery manufacturing method according to claim 1, wherein a slit is formed on the coinciding one of the positive current collecting part and the negative current collecting part, and the part located farther than the slit seen from the storage part.

4. The battery manufacturing method according to claim 3, wherein the integrated plate used in the piling step has the slit in any one of a bent line, a curved line, and an oblique line extending from an edge portion located apart from the storage part toward the storage part.

6. The battery manufacturing method according to claim 2, wherein a slit is formed on the coinciding one of the positive current collecting part and the negative current collecting part, and the part located farther than the slit seen from the storage part.

5. A battery comprising an electrode laminated body encased in an outer casing, the electrode laminated body being formed by piling a positive electrode plate, a negative electrode plate, and a separator, wherein

the electrode laminated body is formed by piling the card-like positive electrode plate, the card-like negative electrode plate, and the separator interposed therebetween and the electrode laminated body comprises the electricity storage part including the positive electrode plate, the negative electrode plate, and the separator, the positive current collecting part including the positive electrode plate only, and the negative current collecting part including the negative electrode plate only,

at least any one of the positive electrode plate of the positive current collecting part and the negative electrode plate of the negative current collecting part is formed with an raised part raised from other parts by partly bending or curving,

a plurality of the raised parts are overlapped one another seen from upper position, and

overlapped portions of the raised parts are connected with a terminal connection member connected to an external terminal.