Busbar assembly and assembling method thereof, assembly tool and battery pack

Patent metadata

Field	Value
Publication number	US-12255356-B2
Application number	US-202217731241-A
Country	US
Kind code	B2
Filing date	Apr 27, 2022
Priority date	Feb 28, 2022
Publication date	Mar 18, 2025
Grant date	Mar 18, 2025

Abstract

A busbar assembly includes a first busbar configured to connect two adjacent battery units. The first busbar includes a first connection part and a second connection part. The first connection part is used to connect a first electrode terminal of one of the battery units. The second connection part is used to connect the second electrode terminal of the other one of the battery units, and the second connection part and the first connection part are in staggered arrangement. The first connection part and the second connection part of the first busbar are in staggered arrangement, to match a vertical distance between a lead surface of the second electrode terminal and a lead surface of the first electrode terminal on a same side of the battery units.

First claim

What is claimed is:

1. A busbar assembly, comprising: a first busbar, wherein the first busbar is configured to connect two adjacent battery units; and the first busbar includes:
a first connection part, wherein the first connection part is configured to connect a first electrode terminal of one of the two adjacent battery units; and
a second connection part, wherein the second connection part is configured to connect a second electrode terminal of the other one of the two adjacent battery units, and the second connection part and the first connection part are in staggered arrangement, to be configured to match a vertical distance between a lead surface of the second electrode terminal and a lead surface of the first electrode terminal located on a same side of the battery units,
wherein the first busbar further comprises a bent part, and the bent part is configured to form a distance difference between the first connection part and the second connection part in staggered arrangement,
the bent part is provided with a buffer structure for enhancing a structural strength of the bent part, and an extending direction of the bent part is changed to form the buffer structure,
one side of the first connection part facing away from the buffer structure is provided with a notch structure, and a shape of the notch structure is adapted to a shape of the buffer structure,
the first busbar is multiple in number, the plurality of first busbars are arranged in sequence, in two adjacent first busbars: the notch structure of the first connection part of the latter one of the plurality of first busbars matches the buffer structure of the former one of the plurality of first busbars, and a gap is defined between the notch structure and the buffer structure along an arrangement direction of the two first busbars.

2. The busbar assembly according to claim 1 , wherein the bent part has an integrated structure with the first connection part and the second connection part.

3. The busbar assembly according to claim 2 , wherein in the adjacent plurality of first busbars:
the first connection part of a latter one of the plurality of first busbars is stacked with the second connection part of a former one of the plurality of first busbars, and the first connection part of the latter one of the plurality of first busbars is arranged in a same layer as the first connection part of the former one of the plurality of first busbars.

4. The busbar assembly according to claim 1 , wherein the bent part extends to form the buffer structure, and the buffer structure protrudes from the first connection part to the second connection part.

5. The busbar assembly according to claim 4 , wherein in the adjacent plurality of first busbars:
the first connection part of a latter one of the plurality of first busbars is stacked with the second connection part of a former one of the plurality of first busbars, and the first connection part of the latter one of the plurality of first busbars is arranged in a same layer as the first connection part of the former one of the plurality of first busbars.

6. The busbar assembly according to claim 1 , wherein in the adjacent plurality of first busbars:
the first connection part of a latter one of the plurality of first busbars is stacked with the second connection part of a former one of the plurality of first busbars, and the first connection part of the latter one of the plurality of first busbars is arranged in a same layer as the first connection part of the former one of the plurality of first busbars.

7. The busbar assembly according to claim 1 , further comprising an insulating structure, wherein at least a part of the insulating structure is located between the second connection part of the former one of the plurality of first busbars and the first connection part of the latter one of the plurality of first busbars.

8. The busbar assembly according to claim 7 , wherein the insulating structure is further provided between the buffer structure of the former one of the plurality of first busbars and the notch structure of the latter one of the plurality of first busbars.

9. The busbar assembly according to claim 8 , further comprising a second busbar and a third busbar, wherein,
the second busbar is configured to connect a same one of the battery units with the adjacent first busbar; the first busbar is configured to connect the first electrode terminal of the battery unit; the second busbar is configured to connect the second electrode terminal of the battery unit, and the second busbar comprises a first output part, the first output part is disposed on one side of the first connection part of the first busbar facing the second connection part, and the first output part is disposed opposite to the first connection part;
the third busbar is configured to connect a same one of the battery units with another adjacent first busbar; the first busbar is configured to connect the second electrode terminal of the battery unit; the third busbar is configured to connect the first electrode terminal of the battery unit, and the third busbar comprises a second output part, the second output part is disposed on one side of the second connection part of the adjacent first busbar facing the first connection part, and the second output part is disposed opposite to the second connection part.

10. A battery pack, comprising the busbar assembly as claimed in claim 9 and battery units, wherein,
each the battery units has a first electrode terminal and a second electrode terminal, and a lead surface of the first electrode terminal and a lead surface of the second electrode terminal are located on a same side and are not coplanar;
in the busbar assembly, the first connection part of the first busbar is connected to the lead surface of the first electrode terminal, and the second connection part of the first busbar is connected to the lead surface of the second electrode terminal, the first connection part and the second connection part are in staggered arrangement to adapt to a vertical distance between the lead surface of the first electrode terminal and the lead surface of the second electrode terminal.

11. The battery pack according to claim 10 , wherein each of the battery units comprises at least one battery, and the battery is a cylindrical battery, and the battery comprises a housing and a pole protruding from the housing, wherein
the pole serves as the first electrode terminal, and an end surface of the pole protruding from the housing and away from the battery serves as the lead surface of the first electrode terminal;
the housing serves as the second electrode terminal, and an end surface of the housing, corresponding to the pole protruding from the housing, serves as the lead surface of the second electrode terminal.

12. The battery pack according to claim 11 , wherein in the first busbar,
the first connection part is provided with a contoured structure, the contoured structure is adapted to a shape of the first electrode terminal, and the first connection part abuts against the lead surface of the first electrode terminal through the contoured structure;
the second connection part is provided with a through hole, the first electrode terminal passes through the through hole, and the second connection part abuts against the lead surface of the second electrode terminal.

13. The battery pack according to claim 12 , wherein a diameter of the through hole provided in the second connection part is larger than a diameter of the pole.

14. The busbar assembly according to claim 1 , further comprising a second busbar and a third busbar, wherein

Assignees

• Calb Co Ltd

Inventors

• Wang Liujie
• Ma Hao
• Zhou Pengfei
• Yan Tinglu

Classifications

• H01M50/507 Primary

  comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules · CPC title

• H01M50/509

  characterised by the type of connection, e.g. mixed connections · CPC title

• H01M10/0404

  Machines for assembling batteries · CPC title

• H01M10/0422

  Cells or battery with cylindrical casing · CPC title

• H01M50/559

  Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells (H01M50/553 takes precedence) · CPC title