Power train battery assembly of an electric, fuel-cell or hybrid vehicle

1. Power train battery assembly of an electric, fuel-cell or hybrid vehicle for transporting passengers and/or goods, said assembly having

a plurality of prefabricated battery cells ( 12 ), each encased in an individual, externally-closed cell housing ( 14 ) and

a housing that fixes the battery cells ( 12 ) together, the battery cells ( 12 ) being arranged in rows,

wherein the housing has at least two gripping walls ( 2 to 8 ) per row, which walls are arranged at opposite outer areas of the circumference of the battery cells ( 12 ) and which walls are braced by holding means ( 32 ; 60 ; 62 ) in the radial direction of the battery cells ( 12 ) against one another in order to radially clamp the battery cells ( 12 ) therebetween, each wall having a corresponding clamp section ( 26 ) for each battery cell ( 12 ),

wherein at least one tube ( 18 ) that conducts cooling fluid extends through the housing to dissipate heat energy from the battery cells ( 12 ),

wherein the at least one tube ( 18 ) is joined with cooling fins ( 16 ) that abut the battery cells ( 12 ), and

wherein press-on fin sections ( 44 ) protrude from the wall and press the cooling fins ( 16 ) snugly against the periphery of the battery cells ( 12 ).

2. Power train battery assembly in claim 1 , characterised in that the walls ( 2 to 8 ) are separate components that are joined together by the holding means ( 32 ; 60 ; 62 ).

3. Power train battery assembly as claimed in claim 1 characterised in that the walls ( 2 to 8 ) have clamp sections ( 26 ) that conform to the exterior circumference of the battery cells ( 12 ).

4. Power train battery assembly as claimed in claim 1 , characterised in that the clamp sections ( 26 ) maximally extend to the central axis (M) of a battery cell row ( 12 ).

5. Power train battery assembly as claimed in claim 1 , characterised in that the clamp sections ( 26 ) abut an axial end sections of the battery cells ( 12 ).

6. Power train battery assembly as in claim 1 , characterised in that the tube ( 18 ) has straight and curved areas ( 20 , 22 ) and is fixed in place by support sections ( 42 ) only at the straight areas ( 22 ), the support sections ( 42 ) protruding from the wall ( 2 to 8 ), being integrally formed therewith, and being spaced from the clamp sections ( 26 ).

7. Power train battery assembly as claimed in claim 1 , characterised in that the press-on fin sections ( 44 ) have a shape that conforms to the shape of a battery cell ( 12 ).

8. Power train battery assembly as claimed in claim 1 , characterised in that the press-on fin sections ( 44 ) are elastic in the radial direction.

9. Power train battery assembly as claimed in claim 1 , characterised in that the press-on fin sections ( 44 ) emanate from the support sections ( 42 ) and extend away therefrom.

10. Power train battery assembly as claimed in claim 1 , characterised in that the press-on fin sections ( 44 ) and the cooling fins ( 16 ) themselves are situated distanced from the clamp sections ( 26 ).

11. Power train battery assembly as claimed in claim 1 , characterised in that the walls ( 2 to 8 ) are composed of plastic.

12. Power train battery assembly as claimed in claim 1 , characterised in that the walls ( 2 to 8 ) are joined to each other by at least one cover ( 10 ).

13. Power train battery assembly as claimed in claim 12 , characterised in that the cover ( 10 ) axially braces the battery cells ( 12 ) and axially fixes the battery cells ( 12 ) in place.

14. Power train battery assembly as claimed in claim 12 , characterised in that the cover ( 10 ) is screwed to the walls ( 2 to 8 ).

15. Power train battery assembly as claimed in claim 1 , characterised in that at least one holding means ( 32 ; 60 ; 62 ) is provided between adjacent battery cells ( 12 ).

16. Power train battery assembly as claimed in claim 1 , characterised in that the holding means ( 32 ), with respect to the longitudinal direction of the battery cells ( 12 ), are arranged above and/or below the battery cells ( 12 ).

17. Power train battery assembly as claimed in claim 1 , characterised in that the holding means ( 32 ; 60 ; 62 ) are positioned axially in the area of the clamp sections ( 26 ).

18. Power train battery assembly as claimed in claim 17 , characterised in that the holding means ( 32 ; 60 ; 62 ) have an axial length that corresponds to at least 0.8 times the axial length of the associated clamp section ( 26 ).

19. Power train battery assembly of an electric, fuel-cell or hybrid vehicle for transporting passengers and/or goods, said assembly having

a plurality of prefabricated battery cells ( 12 ), each encased in an individual, externally-closed cell housing ( 14 ) and

a housing that fixes the battery cells ( 12 ) together, the battery cells ( 12 ) being arranged in rows,

wherein the housing has at least two gripping walls ( 2 to 8 ) per row, which walls are arranged at opposite outer areas of the circumference of the battery cells ( 12 ) and which walls are braced by holding means ( 32 ; 60 ; 62 ) in the radial direction of the battery cells ( 12 ) against one another in order to radially clamp the battery cells ( 12 ) therebetween, each wall having a corresponding clamp section ( 26 ) for each battery cell ( 12 ),

wherein at least one tube ( 18 ) that conducts cooling fluid extends through the housing to dissipate heat energy from the battery cells ( 12 ),

wherein the at least one the tube ( 18 ) is joined with cooling fins ( 16 ) that abut the battery cells ( 12 ), and

wherein the radial clamping of the battery cells ( 12 ), the contacting of the battery cells ( 12 ) with the cooling fins ( 16 ), and the contacting of the cooling fins ( 16 ) with the tubes ( 18 ) are each effected by applying pretensioning by way of different sections of the wall ( 2 to 8 ).

20. Power train battery assembly in claim 19 , characterised in that the walls ( 2 to 8 ) are separate components that are joined together by the holding means ( 32 ; 60 ; 62 ).

21. Power train battery assembly as claimed in claim 19 characterised in that the walls ( 2 to 8 ) have clamp sections ( 26 ) that conform to the exterior circumference of the battery cells ( 12 ).

22. Power train battery assembly as claimed in claim 19 , characterised in that the clamp sections ( 26 ) maximally extend to the central axis (M) of a battery cell row ( 12 ).

23. Power train battery assembly as claimed in claim 19 , characterised in that the clamp sections ( 26 ) abut an axial end sections of the battery cells ( 12 ).

24. Power train battery assembly of an electric, fuel-cell or hybrid vehicle for transporting passengers and/or goods, said assembly having

a plurality of prefabricated battery cells ( 12 ), each encased in an individual, externally-closed cell housing ( 14 ) and

a housing that fixes the battery cells ( 12 ) together, the battery cells ( 12 ) being arranged in rows,

wherein the housing has at least two gripping walls ( 2 to 8 ) per row, which walls are arranged at opposite outer areas of the circumference of the battery cells ( 12 ) and which walls are braced by holding means ( 32 ; 60 ; 62 ) in the radial direction of the battery cells ( 12 ) against one another in order to radially clamp the battery cells ( 12 ) therebetween, each wall having a corresponding clamp section ( 26 ) for each battery cell ( 12 ), and

wherein the holding means ( 32 ; 60 ; 62 ) are projections provided on at least one the walls ( 2 to 8 ), which projections enter into corresponding recesses ( 54 ) of an opposite wall ( 2 to 8 ).

25. Power train battery assembly as claimed in claim 24 , characterised in that the holding means ( 32 ; 60 ; 62 ) have a toothing ( 56 ) on their exterior surface, which toothing ( 56 ) meshes in a form-fitting manner with the surface of the associated recess ( 54 ).

26. Power train battery assembly as claimed in claim 25 , characterised in that the recess ( 54 )_has a counter-toothing ( 58 ) for creating a catching connection.

27. Power train battery assembly as claimed in claim 26 , characterised in that the counter-toothing ( 58 ) is an elastic clip.