Battery module and battery pack

Patent metadata

Field	Value
Publication number	US-12009546-B2
Application number	US-202017125436-A
Country	US
Kind code	B2
Filing date	Dec 17, 2020
Priority date	Dec 30, 2018
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

The present application relates to a battery module and a battery pack, the battery module including a battery cell arrangement structure, bus bars and a fixing plate, where the battery cell arrangement structure includes a plurality of battery cells; the plurality of battery cells are electrically connected by means of a plurality of the bus bars to form a first output electrode of the battery module and a second output electrode of the battery module, and the first output electrode of the battery module and the second output electrode of the battery module are arranged at a same end of the battery module along a horizontal direction; the fixing plate is provided with an insulating portion, and at least a part of the insulating portion is located between the first output electrode of the battery module and the second output electrode of the battery module.

First claim

What is claimed is:

1. A battery module, comprising:
a battery cell arrangement structure, wherein the battery cell arrangement structure comprises a first battery cell arrangement structure and a second battery cell arrangement structure, the first battery cell arrangement structure and the second battery cell arrangement structure both comprise a plurality of battery cells arranged along a horizontal direction, and the first battery cell arrangement structure and the second battery cell arrangement structure are arranged along a vertical direction;
a plurality of bus bars connected to the plurality of battery cells, wherein the plurality of battery cells are electrically connected by means of the plurality of bus bars to form a first output electrode of the battery module and a second output electrode of the battery module, and the first output electrode of the battery module and the second output electrode of the battery module are arranged at a same end of the battery module along the horizontal direction; and
a fixing plate, wherein the fixing plate is located on a side of the battery cell arrangement structure along the horizontal direction, the fixing plate is provided with an insulating portion, the insulating portion comprises a protrusion, the protrusion is arranged on a surface of the fixing plate facing away from the battery cell arrangement structure, the protrusion protrudes in a direction away from the battery cell arrangement structure, and the protrusion is located between the first output electrode of the battery module and the second output electrode of the battery module to separate the first output electrode of the battery module from the second output electrode of the battery module;
wherein a surface with the largest area of each the battery cell in the first battery cell arrangement structure is disposed to a surface with the largest area of each the battery cell in the corresponding second battery cell arrangement structure along the vertical direction, the fixing plate is arranged on a side of the first battery cell arrangement structure and a side of the second battery cell arrangement structure, electrode terminals of the first battery cell arrangement structure and electrode terminals of the second battery cell arrangement structure are arranged on a side of the battery module along a width direction, and are arranged on the side of the first battery cell arrangement structure and the side of the second battery cell arrangement structure.

2. The battery module according to claim 1 , wherein the surface of the fixing plate facing away from the battery cell arrangement structure is provided with a recess, at least a portion of the first output electrode of the battery module and at least a portion of the second output electrode of the battery module are accommodated in the recess, and the protrusion is arranged at a bottom wall of the recess and protrudes in the direction away from the battery cell arrangement structure.

3. The battery module according to claim 1 , wherein the first output electrode of the battery module comprises a first output body electrically connected to an electrode terminal of one of the battery cells and a first bended portion connected to the first output body, and the first bended portion is bended in a direction close to the fixing plate, such that an angle is formed between the first output body and the first bended portion;
the second output electrode of the battery module comprises a second output body electrically connected to an electrode terminal of another one of the battery cells and a second bended portion connected to the second output body, and the second bended portion is bended in a direction close to the fixing plate, such that an angle is formed between the second output body and the second bended portion;
and at least a part of the insulating portion is located between the first bended portion and the second bended portion.

4. The battery module according to claim 3 , wherein the first bended portion is provided with a first through hole, the battery module further comprises a bolt for the first output electrode and a nut for the first output electrode, and the bolt for the first output electrode is fixed to the nut for the first output electrode through the first through hole;
and the second bended portion is provided with a second through hole, the battery module further comprises a bolt for the second output electrode and a nut for the second output electrode, and the bolt for the second output electrode is fixed to the nut for the second output electrode through the second through hole.

5. The battery module according to claim 4 , wherein a material of the fixing plate is resin, and the nut for the first output electrode and the nut for the second output electrode are fixed to the fixing plate by way of integral injection molding.

6. The battery module according to claim 3 , wherein the insulating portion protrudes from the first output body and the second output body, such that at least a part of the insulating portion is located between the first output body and the second output body.

7. The battery module according to claim 1 , wherein the battery cell comprises an electrode assembly and a battery housing, the electrode assembly is accommodated in the battery housing, and the electrode assembly comprises a first electrode sheet, a second electrode sheet and a membrane arranged between the first electrode sheet and the second electrode sheet;
and the electrode assembly is of a coiled structure and is flat, an outer surface of the electrode assembly comprises two flat surfaces, and the two flat surfaces face each other along the vertical direction; or the electrode assembly is of a laminated structure, and the first electrode sheet, the membrane and the second electrode sheet are laminated in the vertical direction.

8. The battery module according to claim 1 , wherein electrode terminals of the plurality of battery cells of the first battery cell arrangement structure and electrode terminals of the plurality of battery cells of the second battery cell arrangement structure are all arranged on a same side of the battery module.

9. A battery pack, comprising:
a case, and
a plurality of battery modules, each of the battery modules comprising:
a battery cell arrangement structure, wherein the battery cell arrangement structure comprises a first battery cell arrangement structure and a second battery cell arrangement structure, the first battery cell arrangement structure and the second battery cell arrangement structure both comprise a plurality of battery cells arranged along a horizontal direction, and the first battery cell arrangement structure and the second battery cell arrangement structure are arranged along a vertical direction;
a plurality of bus bars connected to the plurality of battery cells, wherein the plurality of battery cells are electrically connected by means of the plurality of bus bars to form a first output electrode of the battery module and a second output electrode of the battery module, and the first output electrode of the battery module and the second output electrode of the battery module are arranged at a same end of the battery module along the horizontal direction; and
a fixing plate, wherein the fixing plate is located on a side of the battery cell arrangement structure along the horizontal direction, the fixing plate is provided with an insulating portion, the insulating portion comprises a protrusion, the protrusion is arranged on a surface of the fixing plate facing away from the battery cell arrangement structure, the protrusion protrudes in a direction away from the battery cell arrangement structure, and the protrusion is located b

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• Chen Xingdi
• You Kaijie
• Tang Yu
• Hou Yuepan
• Li Ziyuan
• Ma Jun

Classifications

• H01M50/264

  for cells or batteries, e.g. straps, tie rods or peripheral frames · CPC title

• H01M50/296

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

• H01M50/50

  Current conducting connections for cells or batteries · CPC title

• H01M50/536

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

• H01M50/55

  on the same side of the cell · CPC title