A battery pack is a battery pack for an electric tool. The battery pack is attachable to a tool body. The tool body includes a tool attachment part to which a tool is to be attached and a driver configured to drive the tool. The battery pack includes an electricity accumulator, a battery case, and a cushioning structure. The electricity accumulator includes an all-solid-state battery. The electricity accumulator is configured to accumulate electric power to be supplied to the driver. The battery case houses the electricity accumulator. The cushioning structure is configured to suppress acceleration acting on the electricity accumulator from being changed.

A battery pack is a battery pack for an electric tool. The battery pack is attachable to a tool body. The tool body includes a tool attachment part to which a tool is to be attached and a driver configured to drive the tool. The battery pack includes an electricity accumulator, a battery case, and a cushioning structure. The electricity accumulator includes an all-solid-state battery. The electricity accumulator is configured to accumulate electric power to be supplied to the driver. The battery case houses the electricity accumulator. The cushioning structure is configured to suppress acceleration acting on the electricity accumulator from being changed.

A paper suitable for use in a battery or battery pack as a flame barrier or thermal insulation, the paper comprising 60 to 95 weight percent aerogel powder and 5 to 40 weight aramid polymer fibrils; the paper having a thickness of 50 to 4000 micrometers.

A paper suitable for use in a battery or battery pack as a flame barrier or thermal insulation, the paper comprising 60 to 95 weight percent aerogel powder and 5 to 40 weight aramid polymer fibrils; the paper having a thickness of 50 to 4000 micrometers.

Presented are thermomechanical fuses for mitigating heat propagation across electrochemical devices, methods for making and methods for using such fuses, and traction battery packs with load-bearing, sacrificial thermomechanical fuses to help prevent thermal runaway conditions. A battery assembly includes an electrically insulating battery housing with multiple battery cells disposed inside the battery housing. These battery cells are electrically interconnected, in series or parallel, and stacked in side-by-side facing relation to form adjacent, mutually parallel stacks of battery cells. Thermomechanical fuses thermally connect neighboring stacks of the battery cells. Each thermomechanical fuse is formed, in whole or in part, from a dielectric material that undergoes deterioration or deformation at a predefined critical temperature; in so doing, the thermomechanical fuse thermally disconnects a first stack of cells from a neighboring second stack of cells.

A battery rack effectively prevents the spread of a fire or heat to adjacent battery packs when the fire or thermal runaway occurs in any of a plurality of battery packs. To achieve the above-described object, the battery rack includes a plurality of battery packs; and a rack case having a receiving space with an open structure in which the plurality of battery packs is vertically mounted at intervals and placed in vertical communication with one another, wherein a stopper is provided in the receiving space and disposed between the plurality of battery packs, spaced apart from the plurality of battery packs, and is configured to suppress volume expansion of the battery pack when the volume of the battery pack expands.

The present disclosure provides a thermal blocking sheet (2) for a battery, and a method of manufacturing a thermal blocking sheet for a battery. The thermal blocking sheet includes a frame (3) comprising one or more frame elements configured to resist compression of the sheet, and thermal insulation (4) located within the frame. The method includes forming a frame comprising one or more frame elements configured to resist compression of the sheet, and disposing thermal insulation within the frame.

The present disclosure provides a thermal blocking sheet (2) for a battery, and a method of manufacturing a thermal blocking sheet for a battery. The thermal blocking sheet includes a frame (3) comprising one or more frame elements configured to resist compression of the sheet, and thermal insulation (4) located within the frame. The method includes forming a frame comprising one or more frame elements configured to resist compression of the sheet, and disposing thermal insulation within the frame.

A battery module with enhanced stability against fire and explosion. The battery module includes a cell assembly having a plurality of secondary batteries, a lower case having an open top and having an accommodation space, an upper case coupled to the lower case to cover the open top of the lower case and having a connection hole perforated to communicate with the accommodation space; an upper cover coupled to the upper case to cover an upper portion of the upper case and configured to form a buffer space spaced apart from the upper case, the upper cover having a discharge hole perforated so that the buffer space communicates with the outside; and at least one partition member extending in a horizontal direction inside the buffer space to form a moving passage extending from the connection hole to the discharge hole and configured to have an adjustable extension length.

A battery pack has a plurality of battery stacks, a case, and a thermal insulation cover. The case accommodates the plurality of battery stacks. The thermal insulation cover is arranged so as to expose an outer surface of at least one battery stack from among the plurality of battery stacks inside the case, and to cover an outer surface of a battery stack that is adjacent to the exposed battery stack. A difference obtained by subtracting an amount of removed heat from an amount of heat generated during heat generation is greater in the battery stack that is exposed from the thermal insulation cover than in the battery stack that is covered by the thermal insulation cover.