Battery module
A battery module includes a battery cell having a laminate overcoat, a pair of rubber sheets, a pair of pressure plates, and a pair of housing members from the internal to the external of the battery module. An intervention member including four poles is interposed between the pressure plate and the housing member at the central area of the battery cell to alleviate the stress concentration on the peripheral area of the battery cell. The intervention member may be formed separately from or integrated with the pressure plate.
1. A battery module comprising:
a battery cell;
a pair of pressure plates sandwiching therebetween said battery cell;
a housing receiving therein said pair of pressure plates and said battery cell, said housing pressing said pressure plates toward each other for fixing said battery cell; and
an intervention member disposed between each of said pressure plates and a corresponding portion of said housing at a central area of each of said pressure plates,
wherein said battery cell includes a laminate housing and a battery body having an iterative structure of a plurality of cell units each including a cathode, a first separator, an anode and a second separator.
2. The battery module according to claim 1 , wherein said intervention member includes a plurality of poles.
3. The battery module according to claim 2 , wherein said poles are arranged at four apexes of a rectangle.
4. The battery module according to claim 1 , wherein said intervention member is integrated with each of said pressure plates.
5. The battery module according to claim 4 , wherein said pressure plates have a thickness larger at said central area than at a peripheral area.
6. The battery module according to claim 5 , wherein each of said pressure plates and a corresponding portion of said housing are in contact with each other at said peripheral area when said housing is subject to said external pressure due to warp of said corresponding portion of said housing.
7. The battery module according to claim 1 , wherein a plurality of said battery cell are disposed in a train between said pair of pressure plates.
8. The battery module according to claim 1 , wherein a plurality of said battery cell are stacked one on another.
9. The battery module according to claim 1 , wherein said housing includes a pair of housing members coupled together.
10. A battery module comprising:
a battery cell;
a pair of elastic plates sandwiching said battery cell therebetween;
a pair of pressure plates sandwiching therebetween said elastic plates and said battery cell;
a housing receiving therein said pair of elastic plates, said pair of pressure plates and said battery cell, said housing pressing said pressure plates toward each other so as to fix said battery cell in said housing; and
an intervention member between each of said pressure plates and only a corresponding central portion of said housing.
11. The battery module according to claim 10 , wherein said intervention member includes a plurality of poles.
12. The battery module according to claim 11 , wherein said poles are arranged at four apexes of a rectangle.
13. The battery module according to claim 10 , wherein said intervention member is integrated with each of a respective one of said pressure plates.
14. The battery module according to claim 13 , wherein said pressure plates have a thickness larger at a central area thereof than at a peripheral area thereof.
15. The battery module according to claim 14 , wherein said pressure plates have a truncated pyramid shape.
16. The battery module according to claim 10 , wherein plural ones of said battery cell are disposed in a train between said pair of pressure plates.
17. The battery module according to claim 10 , wherein a plurality of said battery cell are stacked one on another.
18. The battery module according to claim 11 , wherein said housing includes a pair of housing members coupled together.