CPC H01M 50/54 (2021.01) [H01M 10/443 (2013.01); H01M 10/48 (2013.01); H01M 50/209 (2021.01); H01M 2220/10 (2013.01)] | 20 Claims |
1. A battery pack configured to supply electricity to a power tool and comprising:
a housing;
a cell assembly disposed in the housing; and
a cell support member at least configured to support the cell assembly;
wherein the cell assembly comprises a plurality of cells which are sheet-shaped and tabs disposed at at least one end of the cell assembly and protruding from the plurality of cells, the plurality of cells are stacked, each of the plurality of cells comprises an encapsulation member configured to encapsulate the each of the plurality of cells, the cell support member is disposed at two ends of the cell assembly, at least a part of the cell support member encapsulates the tabs, the cell support member is made of an elastic material with a compression ratio higher than or equal to 50%, the cell assembly is configured to be capable of discharging at a rate higher than or equal to 5 C at an ambient temperature T, −22° C.≤T≤−15° C., 5 C represents a current intensity when the cell assembly completely discharges for ⅕ hours, the cell assembly has a gravimetric energy density higher than or equal to 300 wh/kg.
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