Battery pack having interlock structure

Patent metadata

Field	Value
Publication number	US-11705602-B2
Application number	US-201916707641-A
Country	US
Kind code	B2
Filing date	Dec 9, 2019
Priority date	Dec 17, 2018
Publication date	Jul 18, 2023
Grant date	Jul 18, 2023

Abstract

A battery pack having an interlock structure includes a plurality of battery modules, a case that includes a case main body accommodating the plurality of battery modules and a case cover covering the case main body, and a bus bar unit that electrically conducts two battery modules among the plurality of battery modules. The case cover includes a cover connecting portion connected to an accommodation item accommodated in the case or the case main body, and the bus bar unit includes a shielding portion that blocks the cover connecting portion from being removed from the accommodation item or the case main body.

First claim

The invention claimed is:

1. A battery pack having an interlock structure, comprising:
a plurality of battery modules;
a case that includes a case main body accommodating the plurality of battery modules and a case cover covering the case main body; and
a bus bar unit that electrically conducts two battery modules among the plurality of battery modules,
wherein the case cover includes a cover connecting portion connected to an accommodation item accommodated in the case or the case main body,
wherein the bus bar unit includes a shielding portion that blocks the cover connecting portion from being removed from the accommodation item or the case main body,
wherein in a direction in which the cover connecting portion is removed, the shielding portion is disposed so as to be positioned above the cover connecting portion,
wherein the case cover includes an opening portion,
wherein an electrical connection portion between the battery module and the bus bar unit is configured to be accessible from the opening portion,
wherein the bus bar unit includes:
a bus bar that electrically connects the two battery modules;
an insulating bus bar cover that is provided so as not to be removable from the bus bar;
a plate member that is arranged on an upper portion of the bus bar; and
a bolt that fixes the bus bar and the plate member to the battery module at the electrical connection portion,

wherein an upper surface of the plate member and a head of the bolt have an insulation property, and
wherein the head of the bolt, the plate member, the bus bar, and the battery module are arranged in this order from the opening portion.

2. The battery pack having an interlock structure according to claim 1 ,
wherein the cover connecting portion is formed so as to extend toward an opening area of the opening portion, and
wherein a fixing portion that directly or indirectly fixes the cover connecting portion and the accommodation item or the case main body is configured to be accessible from the opening portion.

3. The battery pack having an interlock structure according to claim 1 ,
wherein the battery module includes:
a cell stack body that is configured by stacking a plurality of cells; and
a pair of end plates that are arranged on both sides of the cell stack body in a stacking direction, and

wherein the bus bar unit is fastened to terminal portions respectively arranged on the end plates facing each other of the two battery modules.

4. The battery pack having an interlock structure according to claim 3 ,
wherein the cover connecting portion is directly or indirectly fixed to the end plates facing each other of the two battery modules.

5. The battery pack having an interlock structure according to claim 1 ,
wherein the bolt and the plate member are connected to each other,
wherein the bus bar cover includes a movement restricting portion that restricts a movement of the plate member in a state in which the bolt is loosened, and
wherein a length of a shaft portion of the bolt is longer than a maximum distance between the plate member and the movement restricting portion in a state in which the bolt is loosened.

6. The battery pack having an interlock structure according to claim 1 ,
wherein the shielding portion is provided on the bus bar cover.

7. The battery pack having an interlock structure according to claim 1 ,
wherein the bus bar cover includes a gripping portion capable of being gripped from the opening portion.

8. The battery pack having an interlock structure according to claim 1 ,
wherein the cover connecting portion is fixed to a bracket or a terminal block fixed to the accommodation item.

9. The battery pack having an interlock structure according to claim 1 ,
wherein the shielding portion is disposed so as to completely cover the cover connection portion from above.

Assignees

• Honda Motor Co Ltd

Inventors

• Fujii Ryo
• Kitano Ryo

Classifications

• H01M50/296 Primary

  characterised by terminals of battery packs (terminals of batteries H01M50/543) · CPC title

• H01M50/204 Primary

  Racks, modules or packs for multiple batteries or multiple cells · CPC title

• H01M50/262

  with fastening means, e.g. locks · CPC title

• H01M50/271

  Lids or covers for the racks or secondary casings · CPC title

• H01M50/505

  comprising a single busbar · CPC title