Abstract: A battery includes a jelly roll and a case. The case includes a first shell and a second shell; the first shell has an accommodation cavity therein, the first shell is provided with an opening communicated with the accommodation cavity, the jelly roll is disposed in the accommodation cavity, and the second shell blocks the opening. An explosion-proof score is provided in the first shell and/or the second shell. A burst pressure of the explosion-proof score is P, a tensile strength of a material of the case is ?b, a diameter of the first shell (2) is D, a wall thickness of the case is H, and a depth of the explosion-proof score (211) is h. In a case where the explosion-proof score is linear, P = ( H - h ) ? ? b D - 0 . 6 ? ( H - h ) ; or in a case where the explosion-proof score is curved, P = 2 ? ( H - h ) ? ? b D - 1. 2 ? ( H - h ) .

Abstract: Disclosed is a rechargeable battery having an integrated cell (12, 21, 33, 42). The rechargeable battery having an integrated cell (12, 21, 33, 42) includes a protective circuit board (11, 32, 41) disposed at the top of the battery and a cell (12, 21, 33, 42) disposed at the base of the battery. The cell includes a jellyroll (121, 43) and a metal housing (122, 22, 313, 44). The protective circuit board (11, 32, 41) is disposed on a protective board support structure (13, 36, 45). The cell (12, 21, 33, 42) is electrically connected to the protective circuit board (11, 32, 41) through a socket (14, 35, 46) disposed on the protective circuit board (11, 32, 41). A USB interface (15, 47) for charging the battery is disposed on the protective circuit board (11, 32, 41).

Abstract: Disclosed is a rechargeable battery having an integrated cell (12, 21, 33, 42). The rechargeable battery having an integrated cell (12, 21, 33, 42) includes a protective circuit board (11, 32, 41) disposed at the top of the battery and a cell (12, 21, 33, 42) disposed at the base of the battery. The cell includes a jellyroll (121, 43) and a metal housing (122, 22, 313, 44). The protective circuit board (11, 32, 41) is disposed on a protective board support structure (13, 36, 45). The cell (12, 21, 33, 42) is electrically connected to the protective circuit board (11, 32, 41) through a socket (14, 35, 46) disposed on the protective circuit board (11, 32, 41). A USB interface (15, 47) for charging the battery is disposed on the protective circuit board (11, 32, 41).

Abstract: A battery sealing device, including an upper pressing member, a polar rod, a battery cover plate, and a sealing member. The polar rod includes polar rod large and small ends, and a polar rod connecting plate. The upper pressing member includes an upper pressing through hole matched with the periphery of the polar rod large end. The battery cover plate includes a cover plate through hole; the polar rod large end penetrates through the upper pressing through hole and the cover plate through hole; the upper pressing member arranged above the battery cover plate. The sealing member includes an upper sealing element formed between the upper pressing member and the battery cover plate, an intermediate sealing element formed in the gap between the cover plate through hole and the polar rod large end, and a lower sealing element formed between the battery cover plate and the polar rod connecting plate.

Abstract: A battery sealing device, including an upper pressing member, a polar rod, a battery cover plate, and a sealing member. The polar rod includes polar rod large and small ends, and a polar rod connecting plate. The upper pressing member includes an upper pressing through hole matched with the periphery of the polar rod large end. The battery cover plate includes a cover plate through hole; the polar rod large end penetrates through the upper pressing through hole and the cover plate through hole; the upper pressing member arranged above the battery cover plate. The sealing member includes an upper sealing element formed between the upper pressing member and the battery cover plate, an intermediate sealing element formed in the gap between the cover plate through hole and the polar rod large end, and a lower sealing element formed between the battery cover plate and the polar rod connecting plate.