Battery module that prevents heat transfer between cell banks

Abstract

The present invention provides a battery module structure comprising a cell stack in which a plurality of pouch-type battery cells are stacked in the width direction, an open-topped frame housing the cell stack, and a top plate covering the top of the frame, wherein a resin layer is applied to the upper surface of the cell stack, and the resin layer is in contact with the top plate at the top. The resin layer may extend horizontally, and the space between the cell stack and the top plate may be divided into a plurality of spaces in the horizontal direction by the resin layer.

Claims

1. A cell stack in which multiple pouch-type battery cells are stacked in the width direction, A frame with an open top that houses the aforementioned cell stack, A top plate covering the upper part of the frame and having multiple vent holes, In a battery module including, A heat-resistant or fire-resistant resin layer is applied to the upper surface of the cell laminate. The resin layer extends to a position where the vent holes are not provided and contacts the top plate above, thereby dividing the space between the cell laminate and the top plate into multiple spaces. Battery module.

2. The aforementioned resin layer includes a thermally conductive material. The battery module according to claim 1.

3. The aforementioned resin layer extends in the horizontal direction, The battery module according to claim 1 or 2.

4. The resin layer includes a first resin layer that is applied so as to extend in the longitudinal direction. The space between the cell laminate and the top plate is divided into multiple spaces in the width direction by the first resin layer. The battery module according to claim 3.

5. The cell stack is separated in the width direction by a barrier member stacked together with the battery cells, and includes a plurality of cell banks, each containing a plurality of the battery cells. The first resin layer is applied longitudinally along the upper end of the barrier member, The first resin layer divides the space between the cell laminate and the top plate into multiple spaces in the width direction corresponding to the cell bank. The battery module according to claim 4.

6. The aforementioned resin layer includes a second resin layer that is applied so as to extend in the width direction. The second resin layer divides the space between the cell laminate and the top plate into multiple spaces in the longitudinal direction. The battery module according to claim 3.

7. The upper end of the aforementioned battery cell is provided with a sealing portion that protrudes upward and extends in the longitudinal direction. The second resin layer is applied in the width direction at a position corresponding to one end of the sealing portion in the longitudinal direction, The second resin layer divides the space between the cell laminate and the top plate into, on a planar surface, a space including the sealing portion and a space not including the sealing portion. The battery module according to claim 6.

8. The second resin layer is applied in the width direction at positions corresponding to both ends in the longitudinal direction of the sealing portion, The second resin layer divides the space between the cell laminate and the top plate into, on a planar surface, a space including the sealing portion and a space not including the sealing portion. The battery module according to claim 7.

9. The height of the second resin layer is equal to or greater than the distance between the top plate and the tip of the sealing portion. The battery module according to claim 7.

10. The height of the second resin layer is equal to or greater than the distance between the top plate and the base end of the sealing portion. The battery module according to claim 9.

11. The second resin layer is applied in the width direction to the outside of one end in the longitudinal direction of the region in the top plate where the vent holes are provided. The second resin layer divides the space between the cell laminate and the top plate into a space including the vent holes and a space not including the vent holes, on a planar basis. The battery module according to claim 6.

12. The second resin layer is applied in the width direction to the outer edges of both ends in the longitudinal direction of the region in the top plate where the vent holes are provided. The second resin layer divides the space between the cell laminate and the top plate into a space including the vent holes and a space not including the vent holes, on a planar basis. The battery module according to claim 6.

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