BUSS BAR ASSEMBLY FOR A BATTERY SYSTEM

• US 20180212223A1
• Filed: 01/26/2017
• Published: 07/26/2018
• Est. Priority Date: 01/26/2017
• Status: Active Grant

• Current Assignee: TE Connectivity Solutions GmbH (TE Connectivity Ltd. (United Kingdom))
• Original Assignee: TE Connectivity Corporation (TE Connectivity Ltd. (United Kingdom))
• Inventors: Zhao, Weiping
• Granted Patent: US 10,333,129 B2
• Time in Patent Office: Days
• CPC Class Codes: H01M 10/482 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 2200/103 Fuse
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 50/503 characterised by the shape of the interconnectors
• 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 50/516 by welding, soldering or brazing
• CPC Class Codes: H01M 50/522 Inorganic material
• CPC Class Codes: H01M 50/581 in response to temperature
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A fused buss bar assembly for bussing battery cells of a battery module includes a plate configured to be terminated to a cell terminal of a corresponding battery cell and a buss bar fuse in the plate. The buss bar fuse having at least one connecting strip between a first base section and a second base section. The buss bar fuse has a fuse channel associated with the at least one connecting strip. The fuse channel reduces the cross-section of the buss bar fuse at the corresponding connecting strip such that the connecting strip has a reduced fused cross-section relative to a first cross-section of the first base section and a second cross-section of the second base section. The fused buss bar assembly includes a fuse bridge coupled to the buss bar fuse. The fuse bridge spans the fuse channel to electrically connect the first base section and the second base section.

Claims

1. A fused buss bar assembly for bussing battery cells of a battery module, the fused buss bar assembly comprising:

a plate configured to be terminated to a cell terminal of a corresponding battery cell;

a buss bar fuse in the plate, the buss bar fuse having at least one connecting strip between a first base section and a second base section, the buss bar fuse having a fuse channel associated with the at least one connecting strip, the fuse channel reducing the cross-section of the buss bar fuse at the corresponding connecting strip such that the connecting strip has a reduced fused cross-section relative to a first cross-section of the first base section and a second cross-section of the second base section; and

a fuse bridge coupled to the buss bar fuse, the fuse bridge spanning the fuse channel to electrically connect the first base section and the second base section.

2. The buss bar assembly of claim 1, wherein the fuse bridge is removably coupled to the buss bar fuse.

3. The buss bar assembly of claim 1, wherein the fuse bridge includes a first interface engaging the first base section and the fuse bridge include a second interface engaging the second base section.

4. The buss bar assembly of claim 1, wherein the fuse channel comprises an opening extending through the buss bar fuse between the first and second base sections, the fuse bridge at least partially fill in the opening between the first and second base sections.

5. The buss bar assembly of claim 1, wherein the buss bar fuse include a top, a bottom, a first side and a second side, the fuse channel comprising an opening through the buss bar fuse between the top and the bottom, the opening positioned between the first and second base sections, the fuse bridge at least partially fill in the opening between the first and second base sections.

6. The buss bar assembly of claim 1, wherein the buss bar fuse include a top, a bottom, a first side and a second side, the fuse channel comprising a groove in the top extending between the first and second sides, the groove positioned between the first and second base sections, the fuse bridge spanning the groove between the first and second base sections.

7. The buss bar assembly of claim 6, wherein the fuse bridge includes a protrusion extending into the groove to at least partially fill the groove between the first and second base sections.

8. The buss bar assembly of claim 1, further comprising a plurality of connecting strips and a plurality of fuse channels between corresponding connecting strips, the fuse bridge spanning the plurality of fuse channels.

9. The buss bar assembly of claim 1, wherein the fuse bridge is a jammer block having a protrusion received in the fuse channel to electrically connect the first and second base sections.

10. The buss bar assembly of claim 1, wherein the fuse bridge is an overlapping plate having a first side overlapping and being electrically connected to the first base section and a second side overlapping and being electrically connected to the second base section.

11. The buss bar assembly of claim 1, wherein the connecting strip carries current between the first and second base sections and the fuse bridge carries current between the first and second base sections.

12. The buss bar assembly of claim 1, wherein the fuse bridge is configured to be removed from the buss bar fuse during shipping and handling of the battery module and the fuse bridge is configured to be installed and coupled to the buss bar fuse during normal use of the battery module in the vehicle.

13. The buss bar assembly of claim 1, wherein the plate is a positive plate configured to be terminated to a positive cell terminal of a corresponding battery cell, the fused buss bar assembly further comprising a negative plate configured to be terminated to a negative cell terminal of a corresponding battery cell, the buss bar fuse being positioned between the positive and negative plates, the first base section of the buss bar fuse extending from the positive plate, the second base section of the buss bar fuse extending from the negative plate.

14. A carrier assembly for battery cells of a battery module, the carrier assembly comprising:

a tray configured to be coupled to a top of the battery module over the battery cells, the tray holding a plurality of buss bars configured to electrically connect adjacent battery cells of the battery module, the tray holding at least one fused buss bar assembly, the fused buss bar assembly comprising;

a plate configured to be terminated to a cell terminal of a corresponding battery cell;

a buss bar fuse in the plate, the buss bar fuse having at least one connecting strip between a first base section and a second base section, the buss bar fuse having a fuse channel associated with the at least one connecting strip, the fuse channel reducing the cross-section of the buss bar fuse at the corresponding connecting strip such that the connecting strip has a reduced fused cross-section relative to a first cross-section of the first base section and a second cross-section of the second base section; and

a fuse bridge coupled to the buss bar fuse, the fuse bridge spanning the fuse channel to electrically connect the first base section and the second base section.

15. The carrier assembly of claim 14, wherein the fuse bridge is removably coupled to the buss bar fuse.

16. The carrier assembly of claim 14, wherein the fuse bridge includes a first interface engaging the first base section and the fuse bridge include a second interface engaging the second base section.

17. The carrier assembly of claim 14, wherein the fuse channel comprises an opening extending through the buss bar fuse between the first and second base sections, the fuse bridge at least partially fill in the opening between the first and second base sections.

18. The carrier assembly of claim 14, wherein the connecting strip carries current between the first and second base sections and the fuse bridge carries current between the first and second base sections.

19. A battery system comprising:

a plurality of battery cells being stacked forming a battery module;

a carrier assembly mounted to the battery module, the carrier assembly having a tray holding a plurality of buss bars for electrically connecting adjacent battery cells of the battery module, the tray holding at least one fused buss bar assembly, the fused buss bar assembly comprising;

a plate configured to be terminated to a cell terminal of a corresponding battery cell;

a buss bar fuse in the plate, the buss bar fuse having at least one connecting strip between a first base section and a second base section, the buss bar fuse having a fuse channel associated with the at least one connecting strip, the fuse channel reducing the cross-section of the buss bar fuse at the corresponding connecting strip such that the connecting strip has a reduced fused cross-section relative to a first cross-section of the first base section and a second cross-section of the second base section; and

a fuse bridge coupled to the buss bar fuse, the fuse bridge spanning the fuse channel to electrically connect the first base section and the second base section.

20. The battery system of claim 19, wherein the fuse bridge is removably coupled to the buss bar fuse.