Battery module
Embodiments of the present disclosure relate to a battery module. According to an embodiment of the present disclosure, there is provided a battery module including a plurality of battery cells each including at least one electrode tab, and a bus bar in contact with the electrode tabs to electrically connect the plurality of battery cells, wherein the bus bar includes a plate in which a plurality of holes are formed, and the electrode tabs are inserted into at least a portion of the plurality of holes to electrically connect the plurality of battery cells.
1. A battery module comprising:
a plurality of battery cells each including at least one electrode tab; and
a bus bar connected to the electrode tabs to electrically connect the plurality of battery cells to each other, the bus bar having a plate in which a plurality of holes are formed;
wherein each of the electrode tabs is inserted into one of the plurality of holes and bonded at the one of the plurality of holes to the bus bar so that the bus bar is fixedly coupled to the electrode tabs,
wherein the plate includes a plurality of protruding portions formed at a periphery of each of the plurality of holes, and
wherein the electrode tabs respectively further include:
a bending portion; and
a straight portion extending from the bending portion, the straight portion being inserted into a corresponding one of the plurality of holes and bonded at the corresponding one of the plurality of holes to the bus bar.
2. The battery module of claim 1 , wherein the electrode tabs are inserted into one side of the plate and protrude from the other side of the plate.
3. The battery module of claim 2 , wherein the electrode tabs protrude by a length of 1 to 3 mm from an outer end of the corresponding holes.
4. The battery module of claim 1 , wherein a cross-section of the periphery of each of the plurality of holes is formed to be tapered toward one side of the plate so that each of the electrode tabs is inserted into the corresponding hole.
5. The battery module of claim 1 , wherein a width of an entered space into which each of the electrode tabs enters at the one side of the plate is reduced near the corresponding hole.
6. The battery module of claim 1 , wherein the plate includes a tab connection portion configured to protrude from an outer periphery of each of the holes to an outside of the plate.
7. The battery module of claim 1 , wherein the electrode tabs and the plate are connected by laser welding.
8. The battery module of claim 1 , wherein the plurality of holes are formed to correspond to a thickness and a length of the corresponding electrode tabs, respectively.
9. The battery module of claim 1 , wherein a sum of the gaps on both sides between one of the plurality of holes and one of the electrode tabs inserted into the one of the plurality of holes ranges from 0.1 mm to 0.2 mm.
10. The battery module of claim 1 , wherein:
a plurality of bus bars are provided;
at least two of the plurality of electrode tabs are connected in parallel to any one of the plurality of bus bars to form a parallel assembly; and
a plurality of the parallel assemblies are provided and connected in series or in parallel.
11. The battery module of claim 1 , wherein:
the electrode tabs respectively include an insulating portion formed on at least a portion of the electrode tabs; and
the bending portion formed on the insulating portion.
12. The battery module of claim 1 , wherein each of the electrode tabs is inserted into one of the plurality of holes and bonded as wobble shape.
13. A battery module comprising:
a plurality of battery cells each including at least one electrode tab; and
a bus bar connected to the electrode tabs to electrically connect the plurality of battery cells to each other, the bus bar having a plate in which a plurality of holes are formed;
wherein each of the electrode tabs is inserted into one of the plurality of holes and bonded at the one of the plurality of holes to the bus bar so that the bus bar is fixedly coupled to the electrode tabs,
wherein the battery module further incudes a support plate in which a plurality of support holes corresponding to the holes of the bus bar are formed,
wherein the support plate is located between the plurality of battery cells and the bus bar, and
wherein the battery module further comprises:
a fixing plate in which a plurality of exposure holes corresponding to the holes of the bus bar are formed, wherein the bus bar is located between the support plate and the fixing plate and is fixedly supported thereby.
14. The battery module of claim 13 , wherein the fixing plate is configured to be coupled with the support plate to fix the busbar bus bar.
15. The battery module of claim 13 , wherein the plate of the bus bar includes a plurality of protruding portions formed at a periphery of each of the plurality of holes of the bus bar, and
wherein the plurality of exposure holes are formed larger than the protruding portions so that the plurality of protruding portions are exposed to the outside of the exposure holes.
16. The battery module of claim 13 , wherein a bent portion is formed at the electrode tab, respectively, and
the bent portion is supported to be in contact with one side of any one of the support holes.
17. The battery module of claim 13 , wherein each of the electrode tabs is inserted into one of the plurality of holes of the bus bar and bonded as wobble shape.