Secondary battery module and method of producing the same

Patent metadata

Field	Value
Publication number	US-11322808-B2
Application number	US-202016842955-A
Country	US
Kind code	B2
Filing date	Apr 8, 2020
Priority date	Apr 22, 2019
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

A secondary battery module showing excellent packing efficiency which makes it possible to connect a secondary battery and a charge/discharge device with a stably low resistance without any unnecessary deformation of the secondary battery or an electrode terminal is disclosed. The secondary battery module includes a plurality of stack units, each of the stack units including: at least one non-conductive plate member; at least one conductive member fixed to the plate member; a secondary battery stacked on the plate member; and at least one electrode terminal sticking out of a side face of the secondary battery, and held by the conductive member.

First claim

What is claimed is:

1. A secondary battery module that includes a plurality of stack units, each of the stack units comprising:
at least one non-conductive plate member;
at least one conductive member fixed to the plate member;
a secondary battery stacked on the plate member; and
at least one electrode terminal sticking out of a side face of the secondary battery, and held by the conductive member, wherein
the conductive member has notches, so that tops of protruding portions of the notches are in contact with a surface of the electrode terminal.

2. The secondary battery module according to claim 1 , wherein
the conductive member holding the electrode terminal is made up of a plurality of components in combination.

3. The secondary battery module according to claim 1 , wherein
the conductive member holding the electrode terminal includes a component A abutting one face of the electrode terminal, and a component B abutting another face of the electrode terminal.

4. The secondary battery module according to claim 3 , wherein
the component A is fixed to one of the plate members, the one being arranged on the component A on one side, and the component B is fixed to another one of the plate members, the other one being arranged on the component B on another side.

5. The secondary battery module according to claim 1 , wherein
the conductive member is fixed only to one of the plate members, the one being arranged on the conductive member on one side.

6. The secondary battery module according to claim 1 , wherein
the secondary battery module is structured so that:
pressure is applied to the conductive member; and
stopping applying the pressure releases the conductive member from holding the electrode terminal.

7. The secondary battery module according to claim 1 , wherein
the conductive member holds the electrode terminal between one and another one of the plate members, the one being arranged on the conductive member on one side, the other one being arranged on the conductive member on another side.

8. The secondary battery module according to claim 1 , wherein the conductive member has a hooking part arranged along a side face of the plate member.

9. A method of producing a secondary battery module according to claim 1 , the method comprising:
preparing the at least one non-conductive plate member, the at least one conductive member, and the secondary battery, out of the secondary battery the at least one electrode terminal sticking;
fixing the conductive member to the plate member;
stacking the secondary battery on the plate member; and
holding, by the conductive member, the electrode terminal of the secondary battery.

10. The method according to claim 9 , wherein
the at least one conductive member having a gap that is wider than a thickness of the electrode terminal is prepared as the conductive member, and
after the electrode terminal is arranged in the gap of the conductive member, a width of the gap is narrowed, to hold the electrode terminal by the conductive member.

11. The method according to claim 9 , wherein after the electrode terminal is held by the conductive member, the electrode terminal is slid.

12. The method according to claim 9 , wherein
the at least one conductive member having a gap is prepared as the conductive member, a width of the gap being narrower than a thickness of the electrode terminal, and
the electrode terminal is inserted into the gap of the conductive member, to hold the electrode terminal by the conductive member.

Assignees

• Toyota Motor Co Ltd

Inventors

• Yamashita Yuji
• Kawaoka Hirokazu
• Kito Sumiko
• Nakajima Nagato

Classifications

• H01M10/482 Primary

  for several batteries or cells simultaneously or sequentially · CPC title

• H01M50/522

  Inorganic material · CPC title

• H01M50/517

  by fixing means, e.g. screws, rivets or bolts · CPC title

• H01M50/209

  adapted for prismatic or rectangular cells (H01M50/216 takes precedence) · CPC title

• H01M50/54 Primary

  Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges · CPC title