Battery pack

1. A battery pack, comprising:

a case ( 1 ), comprising an accommodating cavity ( 11 ) and drain holes ( 12 ) in communication with the accommodating cavity ( 11 );

a battery module ( 2 ) contained inside the accommodating cavity ( 11 ), the battery module ( 2 ) being fixed onto an inner wall of the case ( 1 ) by binder; the battery module ( 2 ) comprises a battery cell assembly ( 21 ) and a cooling system ( 22 ); the battery cell assembly ( 21 ) comprises a plurality of battery cells ( 210 ) arranged side by side; the plurality of battery cells ( 210 ) are electrically connected to each other; the cooling system ( 22 ) abuts against the plurality of battery cells ( 210 ); the cooling system ( 22 ) comprises a cooling plate ( 221 ) and two connecting pipes ( 222 ), the two connecting pipes ( 222 ) are respectively located on both sides of the battery module ( 2 ) in a length direction; the drain holes ( 12 ) are provided in one or more rows below a connection position of each of the two connecting pipes ( 222 ) and the cooling plate ( 221 ); and

a blocking member ( 3 ), mounted to the case ( 1 ) and located between the drain holes ( 12 ) and the battery module ( 2 ) on a lateral plane to block the binder for fixing the battery module ( 2 ) from entering the drain holes ( 12 ),

wherein the blocking member ( 3 ) is provided adjacent to an end of the battery module ( 2 ) in the length direction, the drain holes ( 12 ) being positioned to the side of the blocking member ( 3 ) away from the battery module ( 2 ) in the length direction,

wherein a reservoir cavity ( 10 ) is provided below the battery module ( 2 ) to store a liquid, such that the reservoir cavity ( 10 ) is in communication with the drain holes ( 12 ), and

wherein for each of the drain holes ( 12 ) a dimension at one end of the drain hole ( 12 ) in communication with the accommodating cavity ( 11 ) is greater than a dimension at other end of the drain hole ( 12 ) in communication with the reservoir cavity ( 10 ).

2. The battery pack according to claim 1 , wherein the blocking member ( 3 ) is located outside the battery module ( 2 ) along a length direction.

3. The battery pack according to claim 1 , wherein the blocking member ( 3 ) and the drain hole ( 12 ) are disposed at a same wall ( 15 ) of the case ( 1 ).

4. The battery pack according to claim 1 , wherein the blocking member ( 3 ) comprises:

a connecting plate ( 31 ) fixedly connected to the case ( 1 ); and

an upright plate ( 32 ) connected to the connecting plate ( 31 ), wherein the upright plate ( 32 ) extends along a height direction of the battery module ( 2 ).

5. The battery pack according to claim 4 , wherein the connecting plate ( 31 ) and the upright plate ( 32 ) are integral.

6. The battery pack according to claim 4 , wherein the connecting plate ( 31 ) and the upright plate ( 32 ) are connected to form an L-shaped plate.

7. The battery pack according to claim 1 , wherein the blocking member ( 3 ) has a length of L 1 , and there is a farthest distance of L 2 between a side wall of a first drain hole ( 121 ) and a side wall of a second drain hole ( 122 ), wherein L 1 is greater than L 2 ;

wherein the first drain hole ( 121 ) and the second drain hole ( 122 ) are two of the drain holes ( 12 ) located at both ends of a row of drain holes ( 12 ) adjacent to an end of the battery module in a length direction; and

wherein the blocking member ( 3 ) is configured to block a binder for fixing the battery module from entering the drain hole ( 12 ) in a width direction of the case ( 1 ).

8. The battery pack according to claim 1 , wherein a second blocking member ( 3 ) is provided adjacent to an opposing end of the battery module ( 2 ) in the length direction.

9. The battery pack according to claim 1 ,

wherein the battery pack further comprises a reservoir portion ( 4 ) disposed outside the case ( 1 ); and

wherein the reservoir portion ( 4 ) is provided with the reservoir cavity ( 10 ), or the reservoir portion ( 4 ) and the case ( 1 ) jointly form the reservoir cavity ( 10 ).

10. The battery pack according to claim 9 , wherein the reservoir portion ( 4 ) is mounted below a wall ( 15 ) of the case ( 1 ) and is sealingly connected with the wall ( 15 ); and

wherein the reservoir portion ( 4 ) and the wall ( 15 ) enclose the reservoir cavity ( 10 ).

11. The battery pack according to claim 10 , wherein the reservoir portion ( 4 ) is provided with an inner concave portion ( 41 ) recessed in a direction away from the case ( 1 ).

12. The battery pack according to claim 11 , wherein there are a plurality of the drain holes ( 12 ), and the inner concave portion ( 41 ) is located outside all of the drain holes ( 12 ) and covers all of the drain holes ( 12 ).

13. The battery pack according to claim 9 , further comprising:

a protection portion ( 5 ) mounted on one side of the reservoir portion ( 4 ) away from the case ( 1 ).

14. The battery pack according to claim 13 , wherein the protection portion ( 5 ) has a hardness greater than that of the reservoir portion ( 4 ), and the protection portion ( 5 ) entirely covers the reservoir portion ( 4 ).

15. The battery pack according to claim 1 , wherein the case ( 1 ) comprises:

a first case ( 13 ); and

a second case ( 14 ) enclosing the accommodating cavity ( 11 ) with the first case ( 13 ) and located below the first case ( 13 ); wherein the drain hole ( 12 ) is disposed in the second case ( 14 ).

16. The battery pack according to claim 1 , wherein all the drain hole ( 12 ) are arranged along a width direction of the case ( 1 ).

17. The battery pack according to claim 1 , wherein the battery module ( 2 ), the drain hole ( 12 ), and the blocking member ( 3 ) are spaced apart from one another and the blocking member ( 3 ) is located between the drain hole ( 12 ) and the battery module ( 2 ) such that the blocking member ( 3 ) completely separates the drain holes ( 12 ) and the battery module ( 2 ) to block a binder for fixing the battery module ( 2 ) from entering the drain hole ( 12 ).