A battery module includes a plurality of battery cells stacked together; first and second end plates located at a first end and a second end, respectively, of the stacked battery cells; and side plates and a bottom plate coupled to the first and second end plates, wherein at least one of the first end plate and the second end plate has a bent support portion that overlaps with at least a portion of the bottom plate.
1. A battery module comprising:
a plurality of battery cells stacked together;
first and second end plates located at a first end and a second end, respectively, of the stacked battery cells; and
side plates and a bottom plate coupled to the first and second end plates, wherein the bottom plate has a substantially planar surface and extends across substantially an entire width of the battery cells;
wherein at least one of the first end plate and the second end plate has a bent support portion extending in a first direction and having a substantially planar surface, wherein the substantially planar surface directly contacts and overlaps with at least a portion of the substantially planar surface of the bottom plate and a flange extending in a second direction substantially opposite to the first direction.
2. The battery module according to claim 1 , wherein the bent support portion extends from a bottom portion of the first or second end plate generally towards the battery cells.
3. The battery module according to claim 1 , wherein the bottom plate connects the first and second end plates to each other and is located between the first and second plates.
4. The battery module according to claim 3 , wherein the first or second end plate has a first fastening hole on a portion that contacts an end of the bottom plate, and wherein the bottom plate has a second fastening hole that is generally aligned with the first fastening hole.
5. The battery module according to claim 4 , wherein the first and second fastening holes accommodate a fixing member.
6. The battery module according to claim 5 , wherein the fixing member comprises a bolt or a stud.
7. The battery module according to claim 1 , wherein the bottom plate comprises plastic resin.
8. The battery module according to claim 1 , wherein the first or second end plate comprises a base plate contacting a peripheral one of the battery cells and wherein the flange extends from at least one of a side portion or a bottom portion of the base plate.
9. The battery module according to claim 8 , wherein the bottom plate contacts the base plate and is mounted on the bent support portions of at least one of the first end plate or the second end plate.
10. The battery module according to claim 9 , wherein the bent support portion further comprises a third fastening hole through which a fastener extends to fix the bottom plate to the bent support portion.
11. The battery module according to claim 8 , wherein the flange comprises at least two lower flange portions spaced from each other on the base plate, and wherein the bent support portion is located between the flange portions.
12. The battery module according to claim 8 , wherein a width of the bent support portion is substantially identical to the base plate.
13. The battery module according to claim 8 , wherein at least a portion of the flange is coupled to an end of the side plate.