Patent ID: 9166262
Filing Date: 2015-10-20
Classification: H01M,Y02E

Abstract:
1. A battery pack comprising a plurality of battery modules each including a battery cell and a battery case housing the battery cell therein, the plurality of battery modules being electrically connected to each other and stacked in a stacking direction so that a cooling passage for allowing a cooling medium to flow is defined between opposed surfaces of adjacent battery cases, wherein one of the opposed surfaces has a plurality of first ribs projecting toward the other of the opposed surfaces and extending parallel to each other along the one of the opposed surfaces, the other of the opposed surfaces has a plurality of second ribs projecting toward the one of the opposed surfaces and extending parallel to each other along the other of the opposed surfaces, the plurality of first ribs and the plurality of second ribs are integrally formed with the battery cases, the first ribs and the second ribs intersect each other when viewed in a direction along the stacking direction, and end portions of the first ribs and end portions of the second ribs are directly in contact with each other at intersected portions with respect to the stacking direction, the cooling passage is provided by first rib passages defined between the first ribs and second rib passages defined between the second ribs, adjacent first rib passages are in communication with each other through at least one of the second rib passages, adjacent second rib passages are in communication with each other through at least one of the first rib passages, the cooling passage is in a shape of a mesh, each of the first ribs and the second ribs has a continuous zigzag shape along the opposed surfaces when viewed in the direction along the stacking direction, the plurality of battery modules are fixed to each other by applying a predetermined load in the stacking direction, and between the adjacent battery cases, the predetermined load is received at contact portions between the end portions of the first ribs and the end portions of the second ribs.