Battery apparatus

A battery apparatus comprising:

• a plurality of pouch-type batteries, each comprising a first major surface, a second major surface facing away from the first major surface, and a side surface that interconnects between the first and second major surfaces but does not have a sealing seam for bonding the first and second major surfaces, wherein the plurality of pouch-type batteries is arranged along a first axis to form a stacked body such that the first major surface of one of the plurality of pouch-type batteries faces the second major surface of at least one of the plurality of pouch-type batteries and further such that the side surfaces of the plurality of pouch-type batteries are arranged side-by-side and form a first side of the stacked body;
• a cooling plate in a single piece body disposed over the first side of the stacked body such that the single piece body extends in the first axis over a plurality of the side surfaces of the first side;
• and
• a thermally conductive adhesive interposed between the first side of the stacked body and the cooling plate,
• wherein a plurality of recesses is formed into the single piece body of the cooling plate such that each of the plurality of recesses is elongated in a second axis generally perpendicular to the first axis, in which the plurality of recesses are arranged along the first axis with a gap between two immediately neighboring ones of the plurality of recesses such that, in a cross-section taken by a plane parallel to the first axis, the plurality of recesses provides a repeated pattern of undulation with reference to the first side of the stacked body,
• wherein the thermally conductive adhesive bonds the cooling plate to the first side of the stacked body, in which the thermally conductive adhesive directly contacts the side surfaces of the plurality of pouch-type batteries and further directly contacts the cooling plate such that the thermally conductive adhesive contacts inner surfaces of the plurality of recesses for integrating the cooling plate to the stacked body without an aid of a mechanical fastening device for connecting the cooling plate to the side surfaces of the plurality of pouch-type batteries and further such that heat from at least part of the plurality of pouch-type batteries is to transfer to the cooling plate through the thermally conductive adhesive.