Battery cooling system

1. A battery cooling system comprising:

a plurality of batteries electrically connected mutually;

a case that forms an internal space surrounded by a plurality of walls to accommodate the plurality of batteries;

a driving fluid unit accommodated in the case that circulates a fluid for cooling the plurality of batteries inside of the case; and

a passage-along-wall forming member that forms a passage-along-wall disposed along with and between at least a single wall among the plurality of walls that forms the case and the passage-along-wall forming member; wherein

the passage-along-wall forming member has an inflow part where the fluid flowing out of the driving fluid unit before contacting the batteries passes when flowing into the passage-along -wall, and an outflow part where the fluid flowing in from the inflow part into the passage-along-wall passes when flowing out from the passage-along-wall; and

the passage-along-wall includes passages disposed along with the walls of the case that face each other with the plurality of batteries disposed therebetween.

2. The battery cooling system according to claim 1 ,

the outflow part includes an outflow part for communication that faces an adjoining wall so that the fluid flowing through the passage-along-wall flows out from the passage-along-wall and further flows along with the adjoining wall.

3. The battery cooling system according to claim 1 ,

the passage-along-wall forming member has a plurality of outflow parts;

the plurality of outflow parts is disposed in a flowing direction of the fluid that flows through the passage-along-wall with intervals therebetween; and

the fluid that flows out from the outflow parts flows towards the batteries.

4. The battery cooling system according to claim 1 ,

the passage-along-wall forming member is constituted by an inner wall disposed away from at least the single wall with an interval therebetween so as to face the single wall of the case.

5. The battery cooling system according to claim 4 ,

the outflow part is an opening formed in the inner wall.

6. The battery cooling system according to claim 1 ,

the passage-along-wall forming member is formed integrally with at least a single wall, and is constituted by a duct-shaped member with both ends having openings that constitute the inflow part and the outflow part.

7. The battery cooling system according to claim 6 ,

the duct-shaped member is formed integrally with a top wall that is one of the walls to form the case so that upper parts of the plurality of batteries are covered.

8. The battery cooling system according to claim 6 ,

the duct-shaped member is formed integrally with a side wall that is one of the walls to form the case so that sides of the plurality of batteries are covered.

9. The battery cooling system according to claim 1 , wherein,

there is further provided passages disposed along with the wall that adjoins both the walls of the case that face each other with the plurality of batteries disposed therebetween.

10. The battery cooling system according to claim 1 ,

a guiding fluid flow unit is disposed in the passage that guides the fluid that flows out from the driving fluid unit and before contacting the batteries in a direction away from the batteries; and

the guiding fluid flow unit is projecting from the walls of the case, and is constituted by a projecting portion extending in the direction away from the batteries and in a direction parallel to the wall.