Battery module and battery pack

1. A battery module in which a plurality of cells are aligned, the battery module comprising:

a holder having accommodation sections in which the plurality of cells are accommodated such that terminals of first electrodes are aligned at one side and terminals of second electrodes are aligned at the other side;

a first electrode current collector plate which is provided to face terminals of first electrodes of the plurality of cells, and electrically connects the terminals of the first electrodes in parallel; and

a second electrode current collector plate which is provided to face terminals of second electrodes of the plurality of cells, and electrically connects the terminals of the second electrodes in parallel; wherein

a spacer made of an elastic member is disposed between the first electrode current collector plate and the cells,

the spacer further includes an extended portion extending from the side at which the terminals of the first electrodes of the cells are aligned toward the terminals of the second electrodes of the cells along side surfaces of the cells, and

an edge of the extended portion close to the terminals of the second electrodes touches the second electrode current collector plate.

2. The battery module of claim 1 , wherein the spacer includes through holes through which abnormal gas released from the plurality of cells is released.

3. The battery module of claim 2 , wherein the first electrode current collector plate and the spacer partition an exhaust chamber via which the abnormal gas is released from the accommodation sections.

4. The battery module of claim 1 , wherein the terminals of the second electrodes of the cells are connected to the second electrode current collector plate via a lead or a fuse.

5. The battery module of claim 1 , wherein the first electrode is a positive electrode, and the second electrode is a negative electrode.

6. The battery module of claim 1 , wherein

the spacer includes a pair of extended portions which extend toward the terminals of the second electrodes of the cells, and are parallel to each other, and

edges of the pair of extended portions close to the terminals of the second electrodes touch the second electrode current collector plate.

7. The battery module of claim 1 , wherein the extended portion extends from an edge of the spacer toward the terminals of the second electrodes of the cells.

8. The battery module of claim 1 , wherein

the plurality of cells are aligned with the same polarity being in the same direction,

the first electrode current collector plate electrically connects the terminals of the first electrodes of the plurality of cells in parallel, and

the second electrode current collector plate electrically connects the terminals of the second electrodes of the plurality of cells in parallel.

9. The battery module of claim 1 , wherein each cell is accommodated in the accommodation section so that an outer circumferential surface of the cell touches an inner circumferential surface of the accommodation section of the holder.

10. The battery module of claim 1 , wherein the spacer is made of resin.

11. The battery module of claim 10 , wherein the spacer is made of at least one material selected from the group consisting of polystyrene, polypropylene, polyphenylene ether, tetrafluoroethylene-perfluoroalkylvinylether copolymer, polycarbonate, polyphenylene sulfide, polybutylene terephthalate, and silicone.

12. The battery module of claim 1 , wherein the holder is made of a material having thermal conductivity.

13. The battery module of claim 1 , wherein the first electrode current collector plate and the second electrode current collector plate are formed by a first metal bus bar and a second metal bus bar, respectively.

14. A battery pack comprising:

multiple ones of the battery module of claim 1 , wherein

the battery modules are aligned so that the extended portions of the spacers face the same direction.