STACK TYPE BATTERY
First Claim
1. A stack type battery comprising:
- a stacked electrode assembly comprising a plurality of positive electrode plates having respective positive electrode current collector tabs extending outwardly therefrom, a plurality of negative electrode plates having respective negative electrode current collector tabs extending outwardly therefrom, and separators, the positive electrode plates and the negative electrode plates being alternately stacked one upon the other with the separators interposed therebetween;
a square-shaped laminate battery case, for enclosing the stacked electrode assembly and an electrolyte solution in an accommodating space therein, being formed by welding peripheral edges of one or more laminate films each comprising a metal layer and a plastic layer;
a positive electrode current collector terminal joined to the positive electrode current collector tabs being overlapped with each other and a negative electrode current collector terminal joined to the negative electrode current collector tabs being overlapped with each other, the positive and negative electrode current collector terminals protruding from one side of the laminate battery case in a separated manner with respect to its center line; and
at least one insulative spacer, for compressing respective joined portions between the positive and negative electrode current collector tabs and the positive and negative electrode current collector terminals, the at least one insulative spacer being disposed in a tab-connecting space, the tab-connecting space being between an inner face of the laminate battery case through which the positive and negative electrode current collector terminals protrude and a face of the stacked electrode assembly from which the positive and negative electrode current collector tabs protrude, and having an inward displacement restricting protrusion, for restricting inward displacement of the positive and negative electrode current collector terminals, being provided at a location of the spacer corresponding to a region between the positive and negative electrode current collector terminals.
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Accused Products
Abstract
A stack type battery has a stacked electrode assembly (10) disposed in a reduced pressure condition in an accommodating space within a square-shaped laminate battery case (25) formed by melt-bonding peripheral edges of two laminate films (28) to each other. A positive electrode current collector terminal (15) is joined to positive electrode current collector tabs (11) being overlapped with each other, and a negative electrode current collector terminal (16) is joined to the negative electrode current collector tabs (12) being overlapped with each other. An insulative spacer (30) for compressing welded portions (36) between the positive and negative electrode current collector tabs (11, 12) and the positive and negative electrode current collector terminals (15, 16) is disposed in a tab-connecting space existing between the stacked electrode assembly (10) and an inner face of the laminate battery case (25) from which the positive and negative electrode current collector terminals (15, 16) protrude. An inward displacement restricting protrusion (31) for restricting inward displacement of the positive and negative electrode current collector terminals (15, 16) is provided at a location of the spacer (30) that corresponds to a region between the positive and negative electrode current collector terminals (15, 16).
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Citations
19 Claims
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1. A stack type battery comprising:
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a stacked electrode assembly comprising a plurality of positive electrode plates having respective positive electrode current collector tabs extending outwardly therefrom, a plurality of negative electrode plates having respective negative electrode current collector tabs extending outwardly therefrom, and separators, the positive electrode plates and the negative electrode plates being alternately stacked one upon the other with the separators interposed therebetween; a square-shaped laminate battery case, for enclosing the stacked electrode assembly and an electrolyte solution in an accommodating space therein, being formed by welding peripheral edges of one or more laminate films each comprising a metal layer and a plastic layer; a positive electrode current collector terminal joined to the positive electrode current collector tabs being overlapped with each other and a negative electrode current collector terminal joined to the negative electrode current collector tabs being overlapped with each other, the positive and negative electrode current collector terminals protruding from one side of the laminate battery case in a separated manner with respect to its center line; and at least one insulative spacer, for compressing respective joined portions between the positive and negative electrode current collector tabs and the positive and negative electrode current collector terminals, the at least one insulative spacer being disposed in a tab-connecting space, the tab-connecting space being between an inner face of the laminate battery case through which the positive and negative electrode current collector terminals protrude and a face of the stacked electrode assembly from which the positive and negative electrode current collector tabs protrude, and having an inward displacement restricting protrusion, for restricting inward displacement of the positive and negative electrode current collector terminals, being provided at a location of the spacer corresponding to a region between the positive and negative electrode current collector terminals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A stack type battery comprising:
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a stacked electrode assembly comprising a plurality of positive electrode plates having respective positive electrode current collector tabs extending outwardly therefrom, a plurality of negative electrode plates having respective negative electrode current collector tabs extending outwardly therefrom, and separators, the positive electrode plates and the negative electrode plates being alternately stacked one upon the other with the separators interposed therebetween; a square-shaped laminate battery case, for enclosing the stacked electrode assembly and an electrolyte solution in an accommodating space therein, being formed by welding peripheral edges of one or more laminate films each comprising a metal layer and a plastic layer; a positive electrode current collector terminal joined to the positive electrode current collector tabs being overlapped with each other and a negative electrode current collector terminal joined to the negative electrode current collector tabs being overlapped with each other, the positive and negative electrode current collector terminals protruding from one side of the laminate battery case in a separated manner with respect to its center line; and at least one insulative spacer being disposed in a tab-connecting space, the tab-connecting space being between an inner face of the laminate battery case through which the positive and negative electrode current collector terminals protrude and a face of the stacked electrode assembly from which the positive and negative electrode current collector tabs protrude, the at least one insulative spacer having substantially the same length as the dimension of the width of the stacked electrode assembly and both ends of the spacer existing at substantially the same locations as both side faces of the stacked electrode assembly; and the positive and negative electrode current collector terminals having second positioning holes respectively formed therein; and
the spacer having second positioning protrusions at locations corresponding to the second positioning holes. - View Dependent Claims (16, 17, 18, 19)
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Specification