Electricity storage device and method for manufacturing electricity storage device
First Claim
1. An electricity storage device comprising:
- an electricity storage element that is constituted by an electrode body in a positive side and an electrode body in a negative side that face each other while holding a separator;
a sealing member that seals a case member accommodating the electricity storage element;
an electrode protrusion in the positive side and an electrode protrusion in the negative side that are the electrode bodies, which are led out on an element end-face of the electricity storage element, the electrode protrusion in the positive side and the electrode protrusion in the negative side being provided for the element end-face;
a current collector plate in the positive side and a current collector plate in the negative side that are connected to the electrode protrusion in the positive side and the electrode protrusion in the negative side, respectively; and
a terminal member in the positive side that is installed in the sealing member, the terminal member in the positive side having a contact surface connected to a contact surface of the current collector plate in the positive side;
a terminal member in the negative side that is installed in the sealing member, the terminal member in the negative side having a contact surface connected to a contact surface of the current collector plate in the negative side, whereina lateral face of the contact surface of the current collector plate in the positive side and a lateral face of the contact surface of the terminal member in the positive side form a same plane in the positive side, and are welded with each other with a welded part formed on the same plane in the positive side by irradiation of laser beam or electron beam with which the lateral face of the current collector plate and the lateral face of the terminal member in the positive side are irradiated, wherein a center position of the irradiation of the laser beam or the electron beam is a same or different location from the contact surfaces of the current collector plate in the positive side and the terminal member in the positive side,the welded part in the positive side is formed by irradiating the same plane in the positive side with the laser beam or the electron beam along a direction parallel or almost parallel to the contact surfaces of the current collector plate and the terminal member in the positive side,a lateral face of the contact surface of the current collector plate in the negative side and a lateral face of the contact surface of the terminal member in the negative side form a same plane in the negative side, and are welded with each other with a welded part formed on the same plane in the negative side by irradiation of the laser beam or electron beam with which the lateral face of the current collector plate and the lateral face of the terminal member in the negative side are irradiated, wherein a center position of the irradiation of the laser beam or the electron beam is a same or different location from the contact surfaces of the current collector plate in the negative side and the terminal member in the negative side, andthe welded part in the negative side is formed by irradiating the same plane in the negative side with the laser beam or the electron beam along a direction parallel or almost parallel to the contact surfaces of the current collector plate and the terminal member in the negative side.
1 Assignment
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Accused Products
Abstract
An electricity storage device includes an electricity storage element that is constituted by an electrode body in a positive side and an electrode body in a negative side that face each other while holding a separator; a sealing member that seals a case member accommodating the electricity storage element; at least one electrode protrusion that is either of the electrode bodies, which protrudes from an element end-face of the electricity storage element, at least one current collector plate that is connected to the electrode protrusion; and a terminal member that is installed in the sealing member, a lateral face of the terminal member being connected to a lateral face of the current collector plate.
30 Citations
9 Claims
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1. An electricity storage device comprising:
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an electricity storage element that is constituted by an electrode body in a positive side and an electrode body in a negative side that face each other while holding a separator; a sealing member that seals a case member accommodating the electricity storage element; an electrode protrusion in the positive side and an electrode protrusion in the negative side that are the electrode bodies, which are led out on an element end-face of the electricity storage element, the electrode protrusion in the positive side and the electrode protrusion in the negative side being provided for the element end-face; a current collector plate in the positive side and a current collector plate in the negative side that are connected to the electrode protrusion in the positive side and the electrode protrusion in the negative side, respectively; and a terminal member in the positive side that is installed in the sealing member, the terminal member in the positive side having a contact surface connected to a contact surface of the current collector plate in the positive side; a terminal member in the negative side that is installed in the sealing member, the terminal member in the negative side having a contact surface connected to a contact surface of the current collector plate in the negative side, wherein a lateral face of the contact surface of the current collector plate in the positive side and a lateral face of the contact surface of the terminal member in the positive side form a same plane in the positive side, and are welded with each other with a welded part formed on the same plane in the positive side by irradiation of laser beam or electron beam with which the lateral face of the current collector plate and the lateral face of the terminal member in the positive side are irradiated, wherein a center position of the irradiation of the laser beam or the electron beam is a same or different location from the contact surfaces of the current collector plate in the positive side and the terminal member in the positive side, the welded part in the positive side is formed by irradiating the same plane in the positive side with the laser beam or the electron beam along a direction parallel or almost parallel to the contact surfaces of the current collector plate and the terminal member in the positive side, a lateral face of the contact surface of the current collector plate in the negative side and a lateral face of the contact surface of the terminal member in the negative side form a same plane in the negative side, and are welded with each other with a welded part formed on the same plane in the negative side by irradiation of the laser beam or electron beam with which the lateral face of the current collector plate and the lateral face of the terminal member in the negative side are irradiated, wherein a center position of the irradiation of the laser beam or the electron beam is a same or different location from the contact surfaces of the current collector plate in the negative side and the terminal member in the negative side, and the welded part in the negative side is formed by irradiating the same plane in the negative side with the laser beam or the electron beam along a direction parallel or almost parallel to the contact surfaces of the current collector plate and the terminal member in the negative side. - View Dependent Claims (2, 3, 4, 5)
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6. A method for manufacturing an electricity storage device, the method comprising:
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forming an electricity storage element that includes an electrode body in a positive side and an electrode body in a negative side between which a separator is interposed; forming an electrode protrusion in the positive side and an electrode protrusion in the negative side that are the electrode bodies in the positive side and the negative side of the electricity storage element, the electrode bodies being drawn to an element end-face; connecting a contact surface of a current collector plate in the positive side to a contact surface of a terminal member in the positive side that is installed in a sealing member that seals a case member accommodating the electricity storage element to connect the electrode protrusion in the positive side to the terminal member in the positive side through interposal of the current collector plate in the positive side, connecting a contact surface of a current collector plate in the negative side to a contact surface of a terminal member in the negative side that is installed in the sealing member to connect the electrode protrusion in the negative side to the terminal member in the negative side through interposal of the current collector plate in the negative side, and wherein a lateral face of the contact surface of the current collector plate in the positive side and a lateral face of the contact surface of the terminal member in the positive side form a same plane in the positive side, and are welded with each other with a welded part formed on the same plane in the positive side by irradiation of laser beam or electron beam with which the lateral face of the current collector plate and the lateral face of the terminal member in the positive side are irradiated, wherein a center position of the irradiation of the laser beam or the electron beam is a same or different location from the contact surfaces of the current collector plate in the positive side and the terminal member in the positive side, the welded part in the positive side is formed by irradiating the same plane in the positive side with the laser beam or the electron beam along a direction parallel or almost parallel to the contact surfaces of the current collector plate and the terminal member in the positive side, a lateral face of the contact surface of the current collector plate in the negative side and a lateral face of the contact surface of the terminal member in the negative side form a same plane in the negative side, and are welded with each other with a welded part formed on the same plane in the negative side by irradiation of the laser beam or electron beam with which the lateral face of the current collector plate and the lateral face of the terminal member in the negative side are irradiated, wherein a center position of the irradiation of the laser beam or the electron beam is a same or different location from the contact surfaces of the current collector plate in the negative side and the terminal member in the negative side, and the welded part in the negative side is formed by irradiating the same plane in the negative side with the laser beam or the electron beam along a direction parallel or almost parallel to the contact surfaces of the current collector plate and the terminal member in the negative side. - View Dependent Claims (7, 8, 9)
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Specification