Stacked battery

• US 10,446,805 B2
• Filed: 09/13/2017
• Issued: 10/15/2019
• Est. Priority Date: 09/16/2016
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Kikuchi, Takuro
• Primary Examiner(s): Kelly, Cynthia H
• Assistant Examiner(s): Wills, Monique M
• Application Number:
  US15/703,305
• Publication Number:
  US 20180083234A1
• Time in Patent Office: 762 Days
• CPC Class Codes: H01M 10/0413 Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0585 of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 50/103 prismatic or rectangular H01M50/109, H01M50/11 take precedence
• CPC Class Codes: H01M 50/107 having curved cross-section, e.g. round or elliptic H01M50/103, H01M50/109, H01M50/11 take precedence
• CPC Class Codes: H01M 50/119 Metals
• CPC Class Codes: H01M 50/124 having a layered structure
• CPC Class Codes: H01M 50/528 Fixed electrical connections, i.e. not intended for disconnection
• 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

In a stacked battery according to one aspect of the present disclosure, a first current collecting case includes: a first facing portion facing the electrode body in the stacking direction of the electrode body; and positive-electrode wall portions that extend from edge portions of the first facing portion so as to cover first side portions of the electrode body, and whose inner surfaces are electrically connected to edge sides of positive-electrode protruding portions. In the stacking direction of the electrode body, a second current collecting case includes: a second facing portion facing the electrode body in the stacking direction of the electrode body; and negative-electrode wall portions that extend from edge portions of the second facing portion so as to cover second side portions of the electrode body, and whose inner surfaces are electrically connected to edge sides of negative-electrode protruding portions.

Claims

1. A stacked battery comprising:

an electrode body provided by alternately stacking a plurality of positive electrode plates and a plurality of negative electrode plates with separators interposed between the positive electrode plates and the negative electrode plates, each of the positive electrode plates including positive-electrode protruding portions protruding laterally from the negative electrode plate, each of the negative electrode plates including negative-electrode protruding portions protruding laterally from the positive electrode plate; and

a case that is electrically conductive and contains the electrode body inside the case, the case including;

a first current collecting case that covers the electrode body from one side of the electrode body in a stacking direction of the electrode body; and

a second current collecting case that is electrically insulated from the first current collecting case, and covers the electrode body from the other side of the electrode body in the stacking direction of the electrode body,

the first current collecting case including;

a first facing portion that faces the electrode body in the stacking direction of the electrode body; and

positive-electrode wall portions that extend from edge portions of the first facing portion so as to cover first side portions of the electrode body, inner surfaces of the positive-electrode wall portions being electrically and physically connected to edge sides of the positive-electrode protruding portions, and

the second current collecting case including;

a second facing portion that faces the electrode body in the stacking direction of the electrode body; and

negative-electrode wall portions that extend from edge portions of the second facing portion so as to cover second side portions of the electrode body, and inner surfaces of the negative-electrode wall portions being electrically and physically connected to edge sides of the negative-electrode protruding portions.

2. The stacked battery according to claim 1, wherein

the positive-electrode protruding portions are provided in pairs at positions where the positive-electrode protruding portions face each other,

a pair of the positive-electrode wall portions are provided so as to be electrically connected to the positive-electrode protruding portions,

the negative-electrode protruding portions are provided in pairs at positions where the negative-electrode protruding portions face each other, and

a pair of the negative-electrode wall portions are provided so as to be electrically connected to the negative-electrode protruding portions.

3. The stacked battery according to claim 1, wherein

each of the edge sides of the positive-electrode protruding portion is electrically connected to the positive-electrode wall portion in entire length of the each of the edge sides, and

each of the edge sides of the negative-electrode protruding portion is electrically connected to the negative-electrode wall portion in entire length of the each of the edge sides.

4. The stacked battery according to claim 1, wherein

the edge portions of the first facing portion and the edge portions of the positive-electrode wall portions are in contact respectively with corresponding edge portions of the second facing portion and corresponding edge portions of the negative-electrode wall portions via electric insulating members.

5. The stacked battery according to claim 1, wherein

the case has a rectangular shape as viewed from the stacking direction of the electrode body,

only a pair of the positive-electrode protruding portions is provided for each positive electrode plate at respective positions so as to face each other,

only a pair of the negative-electrode protruding portions is provided for each negative electrode plate at respective positions so as to face each other,

the first current collecting case includes only a pair of the first positive-electrode wall portions, and

the second current collecting case includes only a pair of the second negative-electrode wall portions.