Restraining of battery cells by way of a cambered design of the battery housing
The invention relates to a battery cell ( 1 ) for pre-stressed battery modules ( 13 ). The invention further relates to corresponding pre-stressed battery modules ( 13 ) and corresponding production methods. The battery cell ( 1 ) has a cell housing ( 3 ) and a chemicals carrier ( 9 ). The chemicals carrier ( 9 ) is arranged in the cell housing ( 3 ). The cell housing ( 3 ) has a bulging design.
1. A battery cell ( 1 ) for prestressed battery modules ( 13 ), the battery cell ( 1 ) including
a cell housing ( 3 );
a chemicals carrier ( 9 ); and
an expanded foam material ( 11 ),
wherein the chemicals carrier ( 9 ) is disposed in the cell housing ( 3 ),
wherein the cell housing ( 3 ) is cambered, and
wherein the expanded foam material ( 11 ) is disposed between the cell housing ( 3 ) and the chemicals carrier ( 9 ).
2. The battery cell ( 1 ) as claimed in claim 1 wherein the expanded foam material ( 11 ) includes polypropylene.
3. The battery cell ( 1 ) as claimed in claim 1 ,
wherein the cell housing ( 3 ) includes a housing base ( 5 ) and a housing wall ( 7 ); and
wherein the housing base ( 5 ) and the housing wall ( 7 ) are outwardly curved in a convex manner.
4. A prestressed battery module ( 13 ), the battery module ( 13 ) including
at least two cambered battery cells ( 1 ) as claimed in claim 1 ; and
a rigid module frame ( 15 ) which has smaller dimensions than the cambered battery cells ( 1 );
wherein the cambered battery cells ( 1 ) are inserted into the rigid module frame ( 15 ) in such a manner that, on account of their camber, said battery cells ( 1 ) are pressed against one another.
5. The prestressed battery module ( 13 ) as claimed in claim 4 , wherein the rigid module frame ( 15 ) includes at least one of a metal and a composite material.
6. The prestressed battery module ( 13 ) as claimed in claim 4 ,
wherein the rigid module frame ( 15 ) includes at least two end plates ( 17 , 18 ) and pull plates ( 19 ); and
wherein the pull plates ( 19 ) are connected to the end plates ( 17 , 18 ) in such a manner that the end plates ( 17 , 18 ) exert pressure on the battery cells ( 1 ).
7. A method for manufacturing a cambered battery cell ( 1 ) as claimed in claim 1 , the method including the following steps:
providing the cell housing ( 3 );
disposing the chemicals carrier ( 9 ) in the cell housing ( 3 ); and
cambering the cell housing ( 3 ), wherein the cambering of the cell housing ( 3 ) takes place by filling the cell housing ( 3 ) with the expanded foamed material ( 11 ).
8. A method for manufacturing a prestressed battery module ( 13 ) as claimed in claim 5 , the method including the following steps:
providing the at least two cambered battery cells ( 1 );
providing the rigid module frame ( 15 ) which has smaller dimensions than the cambered battery cells ( 1 ); and
disposing the cambered battery cells ( 1 ) in the rigid module frame ( 15 ) in such a manner that, on account of their camber, said battery cells ( 1 ) are pressed against one another.
9. The method as claimed in claim 8 , wherein disposing the cambered battery cells ( 1 ) in the rigid module frame ( 15 ) furthermore includes:
inserting the cambered battery cells ( 1 ) laterally into the rigid module frame ( 15 ) through a first opening ( 21 ); and
closing off the first opening ( 21 ) by way of an end plate ( 18 ) in such a manner that the cambered battery cells ( 1 ) are pressed against one another.
10. The method as claimed in claim 8 , wherein disposing the cambered battery cells ( 1 ) in the rigid module frame ( 15 ) furthermore includes:
providing elastic plates ( 23 ) laterally on the cambered battery cells ( 1 );
inserting the cambered battery cells ( 1 ) into the rigid module frame ( 15 ), from above or from below, through a second opening ( 25 ) in such a manner that the cambered battery cells ( 1 ) are pressed against one another; and
closing off the second opening ( 25 ) by way of a pull plate ( 19 ).