CYLINDRICAL BATTERY
A cylindrical battery according to an embodiment of the present disclosure has a sealing plate includes a flange portion which is secured by crimping to the opening portion of the outer can, a terminal portion formed on the radially inner side of the flange portion, and a thin-walled portion which is formed on the radially outer side of the sealing plate, and which connects the flange portion and the terminal portion; and the thin-walled portion is formed in such a way as to be inclined upward toward the outside from the radially inner side of the sealing plate, and is formed in such a way as to connect a part below the central portion of an outer circumferential surface of the terminal portion to a part above the central portion of an inner circumferential surface of the flange portion.
1 . A cylindrical battery, comprising:
an electrode assembly in which a positive electrode plate and a negative electrode plate are wound with a separator interposed between the positive electrode plate and the negative electrode plate;
an electrolyte;
a bottomed cylindrical exterior housing can that houses the electrode assembly and the electrolyte; and
a sealing plate that seals an opening of the exterior housing can, wherein
the sealing plate has a flange part that is fixed by crimping to the opening of the exterior housing can, a terminal part that is formed further on an inside in a radial direction than the flange part, and a thin part that connects the flange part and the terminal part, and
the thin part is formed to be inclined upward from an inside toward an outside in a radial direction of the sealing plate and is formed to connect a portion below a central part of an outer peripheral face of the terminal part and a portion above a central part of an inner peripheral face of the flange part.
2 . The cylindrical battery according to claim 1 , wherein the thin part is formed to connect a lower part of the outer peripheral face of the terminal part and an upper part of the inner peripheral face of the flange part.
3 . The cylindrical battery according to claim 1 or 2 , wherein the thin part is formed into a tapered shape from the inside toward the outside in the radial direction of the sealing plate.
1 . A cylindrical battery, comprising:
an electrode assembly in which a positive electrode plate and a negative electrode plate are wound with a separator interposed between the positive electrode plate and the negative electrode plate;
an electrolyte;
a bottomed cylindrical exterior housing can that houses the electrode assembly and the electrolyte; and
a sealing plate that seals an opening of the exterior housing can, wherein
the sealing plate has a flange part that is fixed by crimping to the opening of the exterior housing can, a terminal part that is formed further on an inside in a radial direction than the flange part, and a thin part that connects the flange part and the terminal part, and
the thin part is formed to be inclined upward from an inside toward an outside in a radial direction of the sealing plate and is formed to connect a portion below a central part of an outer peripheral face of the terminal part and a portion above a central part of an inner peripheral face of the flange part.
2 . The cylindrical battery according to claim 1 , wherein the thin part is formed to connect a lower part of the outer peripheral face of the terminal part and an upper part of the inner peripheral face of the flange part.
3 . The cylindrical battery according to claim 1 , wherein the thin part is formed into a tapered shape from the inside toward the outside in the radial direction of the sealing plate.
4 . The cylindrical battery according to claim 2 , wherein the thin part is formed into a tapered shape from the inside toward the outside in the radial direction of the sealing plate.