Electricity storage apparatus

Patent metadata

Field	Value
Publication number	US-10923703-B2
Application number	US-201615777735-A
Country	US
Kind code	B2
Filing date	Nov 14, 2016
Priority date	Nov 27, 2015
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

An electricity storage apparatus 100 may include: an electrode assembly 3 including a positive electrode and a negative electrode; a tab 9 including one end which is electrically connected to the electrode assembly 3 ; and a conductive member 20 disposed above the electrode assembly 3 , and electrically connected to the tab 9 . The tab 9 may include a first bent part 14 provided in a vicinity of the one end of the tab 9 , a second bent part 16 provided in a vicinity of another end of the tab 9 , and a joining part 18 provided between the first bent part 14 and the second bent part 16 and joined to the conductive member 20 . The second bent part 16 may be bent so that the other end of the tab 9 is disposed above the conductive member 20.

First claim

What is claimed is:

1. An electricity storage apparatus comprising:
an electrode assembly including a positive electrode and a negative electrode;
a tab including one end which is electrically connected to the electrode assembly; a conductive member disposed above the electrode assembly, and electrically connected to the tab;
a casing housing the electrode assembly; and
an insulating member disposed between the casing and the tab,
wherein
the tab comprises:
a first bent part provided on a side close to the one end of the tab,
a second bent part provided on a side close to another end of the tab, and
a joining part provided between the first bent part and the second bent part, the joining part joined to the conductive member,

the joining part extends along a surface of the conductive member,
the second bent part is bent upward from a direction in which the joining part extends,
the another end of the tab is in contact with the insulating member, and
wherein the casing comprises a body and a lid covering an upper portion of the body, and the insulating member is fixed to a lower surface of the lid.

2. The electricity storage apparatus according to claim 1 , wherein the conductive member is disposed below the joining part of the tab.

3. The electricity storage apparatus according to claim 2 , wherein
the conductive member comprises a curved surface shape part following a surface shape of at least a specific part of the first bent part, and
the curved surface shape part makes contact with the tab at least in the specific part of the first bent part.

4. The electricity storage apparatus according to claim 3 , wherein a corner connecting an upper surface and a lateral surface of the conductive member in the curved surface shape part is processed into a rounded shape, and
a corner connecting a lower surface and the lateral surface of the conductive member in the curved surface shape part is processed into a rounded shape.

5. The electricity storage apparatus according to claim 1 , wherein in the first bent part, the tab is bent parallel to a plane where the one end of the tab is connected to the electrode assembly, and the tab does not extend in a direction perpendicular to the plane where the one end of the tab is connected to the electrode assembly.

6. The electricity storage apparatus according to claim 1 , wherein in the first bent part, the tab is bent parallel to a plane where the one end of the tab is connected to the electrode assembly, and a part of the tab extending in a direction perpendicular to the plane where the one end of the tab is connected to the electrode assembly does not exist.

7. The electricity storage apparatus according to claim 1 , wherein
in view of the conductive member from a direction perpendicular to a plane where the one end of the tab is connected to the electrode assembly, the conductive member comprises a part overlapping with the tab, and
the part overlapping with the tab is flat.

8. The electricity storage apparatus according to claim 1 , wherein
in view of the conductive member from a direction perpendicular to a plane where the one end of the tab is connected to the electrode assembly, the conductive member comprises a part overlapping with the tab, and
an entirety of the part overlapping with the tab is disposed below the joining part.

Assignees

• Toyota Jidoshokki Kk

Inventors

• Hirose Takayuki
• Kurita Mikiya
• Oide Ryuji
• Ogasawara Masato

Classifications

• H01M50/536

  characterised by the method of fixing the leads to the electrodes, e.g. by welding · CPC title

• H01M50/533

  characterised by the shape of the leads or tabs · CPC title

• H01M50/528 Primary

  Fixed electrical connections, i.e. not intended for disconnection · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2/26 Primary

  Electricity · mapped topic