Battery module

Abstract

Provided is a battery module that can achieve weight reduction by reducing the number of components. The battery module is provided with: a monoblock housing; a plurality of electrode laminates which are housed in the monoblock housing in a vertical orientation, are arranged in parallel to each other, are in a vertically long shape, and each have a positive electrode plate, a positive electrode tab lead, a negative electrode plate, a negative electrode tab lead, and a hydroxide ion conductive separator; a plurality of connection terminals which each connect, in series via the positive electrode tab lead and / or the negative electrode tab lead, adjacent electrode laminates among the plurality of electrode laminates; and an electrolyte with which the monoblock housing is filled. The monoblock housing has: a bottom part; a pair of long-side lateral wall parts which are parallel to the lamination direction of the electrode laminates; a pair of short-side lateral wall parts which are perpendicular to the lamination direction of the electrode laminates; and a lid part. Ribs which protrude outward are provided on the outer surfaces of the short-side lateral wall parts.

Claims

1. A monoblock housing; a plurality of vertically elongated electrode stacks housed vertically within the monoblock housing and arranged parallel to each other, wherein each electrode stack comprises: a positive electrode plate including a positive electrode active material layer and a positive electrode current collector; a positive electrode tab lead extending from the end of the positive electrode plate; a negative electrode plate provided opposite the positive electrode plate and including a negative electrode active material layer and a negative electrode current collector, which includes at least one selected from the group consisting of zinc, zinc oxide, zinc alloy and zinc compounds; a negative electrode tab lead extending from the end of the negative electrode plate at a position that does not overlap with the positive electrode tab lead; and a hydroxide ion conductive separator that isolates the positive electrode plate and the negative electrode plate in a manner that allows hydroxide ion conduction; a plurality of connection terminals for connecting adjacent electrode stacks in the plurality of electrode stacks in series via the positive electrode tab lead and / or the negative electrode tab lead; and an electrolyte filled within the monoblock housing in which the electrode stacks are immersed. A battery module comprising a monoblock housing having a bottom, a pair of longitudinal side walls parallel to the stacking direction of the electrode stack, a pair of transverse side walls perpendicular to the stacking direction of the electrode stack, and a lid, wherein each of the transverse side walls is provided with a rib projecting outward.

2. The battery module according to claim 1, wherein the plurality of electrode stacks are housed in an exposed state within a single monoblock housing, without each of them being housed in an individual single cell case.

3. The battery module according to claim 1 or 2, wherein the ribs are arranged to form a repeating pattern of squares or hexagons when viewed from above.

4. The battery module according to claim 1 or 2, wherein the ribs are arranged to form a repeating hexagonal pattern when viewed from above.

5. The battery module according to claim 1 or 2, wherein the ribs are arranged to form a honeycomb pattern.

6. The battery module according to claim 1 or 2, wherein the height of the ribs is 5 to 15 mm.

7. The battery module according to claim 1 or 2, wherein the thickness of the rib is 2 to 10 mm.

8. The battery module according to claim 1 or 2, wherein in each of the short side walls, the ratio of the planar area occupied by the rib to the planar area of ​​the short side wall is 10 to 40%.

9. The battery module according to claim 1 or 2, wherein the entire electrode stack is immersed in the electrolyte.

10. The battery module according to claim 1 or 2, wherein the lid portion has a pair of short side portions that form a common pair of sides together with the pair of short side walls, and additional ribs are provided on the outer surface of each of the pair of short side portions.

11. The battery module according to claim 10, wherein the height of the additional ribs is 3 to 20 mm.

12. The battery module according to claim 10, wherein the thickness of the additional ribs is 2 to 15 mm.

13. The battery module according to claim 10, wherein in each of the short side portions, the ratio of the planar area occupied by the additional ribs to the planar area of ​​the short side portion is 10 to 40%.

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