This application provides a battery, an apparatus, and a manufacturing method and an apparatus of batteries, and relates to the field of energy storage technologies. The battery includes two battery cells and two discharge channels. The two battery cells each include a pressure relief mechanism, and the pressure relief mechanism is configured to be actuated when internal pressure or temperature in the battery cell reaches a threshold, to release the internal pressure. The two discharge channels are configured to collect emissions respectively from the corresponding battery cell when the pressure relief mechanism is actuated.

A cell case of a secondary battery comprised of a can body to which a can bottom is double seamed, in which cell case, it is possible to solve the problem of the drop in cooling efficiency due to the presence of a double seam when cooling such a cell case by a cooling device or using a cooling sheet, and a battery module having a plurality of such cell cases are provided. That is, a cell case of a secondary battery having a rectangular tube-shaped can body, a can bottom double seamed to a bottom end of the can body, and a can lid double seamed to a top end of the can body, in which cell case of a secondary battery, an area ratio 51 of part of the can bottom, comprised of a portion 1 between a plane vertical to the can body a distance of 0.5 mm above a bottom end of a double seam of the can body and the can bottom and a plane vertical to the can body a distance of 1.0 mm below the bottom end of the double seam, with respect to a cross-sectional area of the can body at the bottom end of the double seam is 50% or more, and a battery module having a plurality of such cell cases are provided.

A heat insulation pad and method of making the same, battery assembly and device are provided. In some embodiments, the heat insulation pad includes silicon rubber and aerogel dispersed in the silicon rubber, wherein the heat insulation pad satisfies that: a temperature difference between a surface on one side of the heat insulation pad and a surface on the other side opposite to the one side is ≥150° C., when the surface on one side of the heat insulation pad is contacted with hot surface having a temperature of 600° C. for 5 minutes under a pressure of 0.9 MPa followed by pressure relief and then is contacted with hot surface having a temperature of 600° C. for another 20 minutes. By using the heat insulation pad of the present disclosure, the safety performance of the battery assembly and of the device can be improved.

A heat insulation pad and method of making the same, battery assembly and device are provided. In some embodiments, the heat insulation pad includes silicon rubber and aerogel dispersed in the silicon rubber, wherein the heat insulation pad satisfies that: a temperature difference between a surface on one side of the heat insulation pad and a surface on the other side opposite to the one side is ≥150° C., when the surface on one side of the heat insulation pad is contacted with hot surface having a temperature of 600° C. for 5 minutes under a pressure of 0.9 MPa followed by pressure relief and then is contacted with hot surface having a temperature of 600° C. for another 20 minutes. By using the heat insulation pad of the present disclosure, the safety performance of the battery assembly and of the device can be improved.

An aluminum battery negative electrode structure includes an aluminum foil and a coating layer. The coating layer is arranged on the aluminum foil. A material of the coating layer includes a high specific surface area carbon material. A specific surface area of the high specific surface area carbon material ranges from 500 m.sup.2/g to 3,000 m.sup.2/g.

An aluminum battery negative electrode structure includes an aluminum foil and a coating layer. The coating layer is arranged on the aluminum foil. A material of the coating layer includes a high specific surface area carbon material. A specific surface area of the high specific surface area carbon material ranges from 500 m.sup.2/g to 3,000 m.sup.2/g.

A power supply device includes a plurality of rectangular battery cells stacked in the thickness direction, and a plurality of separators interposed between adjacent battery cells. The separator includes an insulating separator frame that forms a defined space surrounded in a frame shape, and a separator core that is inserted into the defined space surrounded by the separator frame and is disposed between the adjacent battery cells.

A power supply device includes a plurality of rectangular battery cells stacked in the thickness direction, and a plurality of separators interposed between adjacent battery cells. The separator includes an insulating separator frame that forms a defined space surrounded in a frame shape, and a separator core that is inserted into the defined space surrounded by the separator frame and is disposed between the adjacent battery cells.

A battery module including a plurality of battery cells that prevents the movement of the battery cells due to impact and has excellent cooling performance of the battery cells includes a battery cell group including a laminate of a plurality of flattened rectangular battery cells stacked in a thickness direction of the battery cells, and a housing storing the battery cell group. The battery cell group includes a plurality of cell holders configured to hold the individual battery cells from both sides in the thickness direction, and a plurality of side plates disposed at both ends of the plurality of battery cells in a width direction via the plurality of cell holders. Each of the cell holders has a restriction portion configured to restrict movement of the corresponding battery cell in a direction intersecting the thickness direction, and fixing portions that engage with the side plates.

A partition member has a thickness direction and a surface direction perpendicular to the thickness direction, and which separates single cells that make up an assembled battery in the thickness direction, or a single cell that makes up the assembled battery in the thickness direction and a member other than the single cells. The partition member includes, in the interior thereof, a fluid having a boiling point at normal pressure of 80° C. to 250° C., and a flow channel of the fluid extending along the surface direction. The fluid is held in a fluid holding part, and the fluid holding part is hermetically sealed by a packaging material.