Battery pack

1. A battery pack, comprising:

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

a battery module ( 2 ) contained in the accommodating cavity ( 11 ), wherein the battery module ( 2 ) comprises a battery cell assembly ( 21 ) and a cooling system ( 22 ), wherein the battery cell assembly ( 21 ) comprises a plurality of battery cells ( 210 ) arranged side by side and electrically connected to each other, wherein the cooling system ( 22 ) is configured to cool the battery cell assembly ( 21 ) of the battery module ( 2 ) and comprises a cooling plate ( 221 ) and a connecting pipe ( 222 ), and wherein the drain hole ( 12 ) is adjacent to a connection of the cooling plate ( 221 ) and the connecting pipe ( 222 );

a blocking member ( 3 ) mounted to the case ( 1 ) and being disposed on one side of the battery module ( 2 ) in a width direction, wherein at least a part of the blocking member ( 3 ) is arranged between the battery module ( 2 ) and the drain hole ( 12 ) to block a binder for fixing the battery module ( 2 ) from entering the drain hole ( 12 );

a pressure plate ( 4 ) fixedly connected to the blocking member ( 3 ), wherein the pressure plate ( 4 ) comprises a cover plate ( 41 ), and covers the battery module ( 2 );

a reservoir cavity ( 10 ) provided below the battery module ( 2 ) to store a liquid, such that the reservoir cavity ( 10 ) is in communication with the drain hole ( 12 ), wherein the drain hole ( 12 ) is configured to allow liquid to flow unidirectionally from the drain hole ( 12 ) to the reservoir cavity ( 10 ),

wherein the blocking member ( 3 ) and the drain hole ( 12 ) are disposed at a bottom wall ( 15 ) of the case ( 1 ),

wherein the pressure plate ( 4 ) is configured to constrain the deformation of the battery module ( 2 ),

wherein there is a gap between the cover plate ( 41 ) of the pressure plate ( 4 ) and the case,

wherein the blocking member ( 3 ) comprises:

a first blocking portion ( 31 ) fixedly connected to the case ( 1 ); and

a second blocking portion ( 32 ) located on one side of the first blocking portion ( 31 ) away from the battery module ( 2 ), and fixedly connected to the case ( 1 ), and

wherein the drain hole ( 12 ) is located between the first blocking portion ( 31 ) and the second blocking portion ( 32 ), and at least one of the first blocking portion ( 31 ) and the second blocking portion ( 32 ) is provided with a notch ( 34 );

a reservoir portion ( 5 ) disposed outside the case ( 1 ), wherein the reservoir portion ( 5 ) is provided with the reservoir cavity ( 10 ), or the reservoir portion ( 5 ) and the case ( 1 ) jointly form the reservoir cavity ( 10 ); and

a protection portion ( 6 ) mounted on one side of the reservoir portion ( 5 ) away from the case ( 1 ), wherein the protection portion ( 6 ) has a hardness greater than that of the reservoir portion ( 5 ), and the protection portion ( 6 ) entirely covers the reservoir portion ( 5 ).

2. The battery pack according to claim 1 , wherein a notch ( 34 ) is provided at one end of the blocking member ( 3 ) connected to the bottom wall ( 15 ), the notch ( 34 ) penetrates the blocking member ( 3 ) along a thickness direction of the blocking member ( 3 ), and the notch ( 34 ) is configured to enable that liquid within the accommodating cavity ( 11 ) flows into the drain hole ( 12 ) via the notch ( 34 ).

3. The battery pack according to claim 2 , wherein the notch ( 34 ) extends to a side surface ( 35 ) of the blocking member ( 3 ) connected to the bottom wall ( 15 ).

4. The battery pack according to claim 3 , wherein the first blocking portion ( 31 ) and the second blocking portion ( 32 ) are both provided with the notch ( 34 ).

5. The battery pack according to claim 4 , wherein the notch ( 34 ) of the first blocking portion ( 31 ) and the notch ( 34 ) of the second blocking portion ( 32 ) are arranged face to face.

6. The battery pack according to claim 3 , wherein the block member ( 3 ) further comprises a connection portion ( 33 ), wherein the first blocking portion ( 31 ) and the second blocking portion ( 32 ) are both disposed at an edge of the connection portion ( 33 ), and wherein the blocking member ( 3 ) has a U-shaped cross section.

7. The battery pack according to claim 1 , wherein the pressure plate ( 4 ) comprises:

a connecting plate ( 42 ) connected to the cover plate ( 41 ) and located at one side of the cover plate ( 41 ) in a width direction, wherein the connecting plate ( 42 ) is detachably connected to the blocking member ( 3 ).

8. The battery pack according to claim 1 , wherein there are a plurality of the blocking members ( 3 ), and the blocking members ( 3 ) are provided on both width sides of the battery module ( 2 ).

9. The battery pack according to claim 1 , wherein the drain hole ( 12 ) is located at the lowermost of the bottom wall ( 15 ).

10. The battery pack according to claim 9 , wherein the reservoir portion ( 5 ) is mounted below the bottom wall ( 15 ) of the case ( 1 ), such that the reservoir portion ( 5 ) is sealingly connected with the bottom wall ( 15 ), wherein the reservoir portion ( 5 ) and the bottom wall ( 15 ) enclose the reservoir cavity ( 10 ).

11. The battery pack according to claim 9 , wherein the reservoir portion ( 5 ) is provided with an inner concave portion ( 51 ) recessed in a direction away from the case ( 1 ).

12. The battery pack according to claim 11 , comprising a plurality of the drain holes ( 12 ), wherein the inner concave portion ( 51 ) is located outside all of the drain holes ( 12 ) and covers all of the drain holes ( 12 ).