Electricity storage module

• US 10,608,227 B2
• Filed: 09/04/2014
• Issued: 03/31/2020
• Est. Priority Date: 09/13/2013
• Status: Active Grant

• Current Assignee: Autonetworks Technologies, Ltd. (Sumitomo Corporation), Sumitomo Electric Industries Limited (Sumitomo Corporation), Sumitomo Wiring Systems Limited (Sumitomo Corporation)
• Original Assignee: Autonetworks Technologies, Ltd. (Sumitomo Corporation)
• Inventors: Okamoto, Ryoya, Hiramitsu, Hiroomi
• Primary Examiner(s): Kelly, Cynthia H
• Assistant Examiner(s): Alam, Rashid A
• Application Number:
  US15/021,505
• Publication Number:
  US 20160233476A1
• Time in Patent Office: 2,035 Days
• Field of Search: 429 90
• CPC Class Codes: H01G 11/12 Stacked hybrid or EDL capacitors
• CPC Class Codes: H01G 11/76 specially adapted for integration in multiple or stacked hybrid or EDL capacitors
• CPC Class Codes: H01G 11/82 Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• 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 50/211 adapted for pouch cells
• CPC Class Codes: H01M 50/262 with fastening means, e.g. locks
• CPC Class Codes: H01M 50/507 comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
• CPC Class Codes: H01M 50/509 characterised by the type of connection, e.g. mixed connections
• CPC Class Codes: H01M 50/522 Inorganic material
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

An electricity storage module includes a layered object obtained by layering power storage elements each having positive and negative foil-shaped lead terminals that project in an outward direction from an end portion, and connection members that connect the lead terminals of adjacent power storage elements to each other. An insulating holding member is arranged between the layered object and the connection members. Connection member holding portions that hold the connection members are provided on the insulating holding member, and slits are provided on the insulating holding member so as to extend along edge portions of the connection members. The lead terminals are connected to the connection members by being inserted through the slits and folded over onto the connection members.

Claims

1. An electricity storage module comprising:

a layered object in which a plurality of power storage elements have a plurality of foil-shaped lead terminals, each power storage element has positive and negative foil-shaped lead terminals that project in an outward direction from an end portion and are layered such that the plurality of foil-shaped lead terminals are arranged in pairs of equal polarity, the pairs include one pair with first and second foil-shaped lead terminals and another pair with third and fourth foil-shaped lead terminals;

connection members that each connect the lead terminals of adjacent power storage elements to each other, and each have a shape in which a first connection portion and a second connection portion that are provided parallel with each other are coupled by coupling portions at respective end portions, at least one of the connection members has a hole portion being defined at least in part by an inner periphery of the first connection portion and an inner periphery of the second connection portion; and

an insulating holding member that is arranged between the layered object and the connection members, has connection member holding portions with holding walls that at least partially surround the connection members and hold the connection members on a surface on a side opposite to a surface that opposes the layered object, and has a plurality of slits provided so as to extend along edge portions of the connection members held by the connection member holding portions, the holding walls include one or more outer peripheral walls that rise along an outer periphery of the connection members and one or more inner peripheral walls that rise along an inner periphery of the connection members, the plurality of slits include a first slit defined between the one or more outer peripheral walls of the insulating holding member and the outer periphery of the connection member, a second slit defined between the one or more inner peripheral walls of the insulating holding member and the inner periphery of the connection member, a third slit defined between the one or more inner peripheral walls of the insulating holding member and the inner periphery of the connection member, and a fourth slit defined between the one or more outer peripheral walls of the insulating holding member and the outer periphery of the connection member,

wherein the plurality of foil-shaped lead terminals are connected to the connection members such that the first foil-shaped lead terminal is inserted through the first slit and is folded over onto the connection member, the second foil-shaped lead terminal is inserted through the second slit and is folded over onto the connection member, the third foil-shaped lead terminal is inserted through the third slit and is folded over onto the connection member, and the fourth foil-shaped lead terminal is inserted through the fourth slit and is folded over onto the connection member, and

adjacent lead terminals having the same polarity are connected in parallel by the first connection portions and the second connection portions, and lead terminals that have different polarities are connected in series by the coupling portions.

2. The electricity storage module according to claim 1, wherein the holding walls are provided so as to extend along the edge portions of the connection members.

3. The electricity storage module according to claim 1, wherein the connection member holding portions include elastic locking pieces capable of locking the edge portions of the connection members.

4. The electricity storage module according to claim 1, wherein insertion guide portions for guiding insertion of the first, second, third, and fourth lead terminals into the first, second, third, and fourth slits, respectively, are provided in opening edge portions of the first, second, third, and fourth slits on a side that opposes the layered object.

5. The electricity storage module according to claim 1, wherein voltage detection lines are connected to the connection members.

6. The electricity storage module according to claim 2, wherein insertion guide portions for guiding insertion of the first, second, third, and fourth lead terminals into the first, second, third, and fourth slits, respectively, are provided in opening edge portions of the first, second, third, and fourth slits on a side that opposes the layered object.

7. The electricity storage module according to claim 3, wherein insertion guide portions for guiding insertion of the first, second, third, and fourth lead terminals into the first, second, third, and fourth slits, respectively, are provided in opening edge portions of the first, second, third, and fourth slits on a side that opposes the layered object.

8. The electricity storage module according to claim 2, wherein voltage detection lines are connected to the connection members.

9. The electricity storage module according to claim 3, wherein voltage detection lines are connected to the connection members.

10. The electricity storage module according to claim 4, wherein voltage detection lines are connected to the connection members.