Energy storage device

Abstract

The present invention provides an energy storage device that can discharge gas outside the storage case using a cooler. [Solution] The energy storage device 1 comprises a plurality of bipolar batteries 30 arranged in the arrangement direction, a housing case 10 that houses the plurality of bipolar batteries 30, and a cooler 50 positioned between adjacent bipolar batteries 30 in the arrangement direction and having a flow path inside. The cooler 50 includes, when viewed from the arrangement direction, a first protrusion 51 that protrudes into the housing case 10 from the plurality of bipolar batteries 30, and a second protrusion 52 that protrudes to the outside from the housing case 10. The first protrusion 51 and the second protrusion 52 are provided with weak points 55 and 56 that rupture at a pressure lower than the pressure resistance pressure of the housing case 10.

Claims

1. Multiple bipolar batteries arranged in the direction of the arrangement, A housing case for housing the aforementioned multiple bipolar batteries, The system comprises a cooler positioned between adjacent bipolar batteries in the aforementioned arrangement direction, and having a flow path inside, The cooler, when viewed from the direction of the arrangement, includes a first protrusion that protrudes into the housing case from the plurality of bipolar batteries, and a second protrusion that protrudes outward from the housing case. An energy storage device wherein the first and second protrusions are provided with weak points that rupture at a pressure lower than the pressure resistance pressure of the housing case.

2. The aforementioned arrangement direction is parallel to the vertical direction. The cooler has an upper surface and a lower surface that are aligned in the direction of the arrangement, The weak portion provided on the first protrusion is provided on the upper surface, The energy storage device according to claim 1, wherein the vulnerable portion provided on the second protrusion is provided on the lower surface.

3. The energy storage device according to claim 1 or 2, wherein a flammable cooling oil flows through the aforementioned flow path.

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