Abstract: The method of manufacturing a secondary battery includes a layering step of forming an electrode body in which positive electrode plates and negative electrode plates are alternately layered with separators interposed in between, the layering step includes, a step of preparing a negative electrode sheet having negative electrode active material layers formed on two surfaces of a negative electrode core body, a step of forming a layered sheet by adhering a first separator and a second separator on two surfaces of the negative electrode sheet with adhesion layers in between, the layered sheet including the first separator, the negative electrode sheet, and the second separator, a step of forming a layered body by cutting the layered sheet, the layered body having two surfaces of the negative electrode plates sandwiched between the first and second separators, and a step of forming the electrode body using the layered body.

Abstract: A battery includes a stacked electrode body including a plurality of single plate cells and having a positive electrode lead-stacked part and a negative electrode lead-stacked part, the single plate cells each being formed by stacking a positive electrode and a negative electrode with a separator interposed therebetween, the positive electrode lead-stacked part being formed by stacking positive electrode leads of the positive electrodes on top of each other in stacking order of the single plate cells, the negative electrode lead-stacked part being formed by stacking negative electrode leads of the negative electrodes on top of each other in stacking order of the single plate cells; a positive electrode terminal; and a negative electrode terminal.

Abstract: Provided is a power storage device comprising: a battery stack in which a plurality of secondary batteries and a plurality of spacers are alternately arranged; a pair of end plates disposed on both sides in the first direction of the battery stack; and a compression spring serving as a pressurizing means for pressurizing the battery stack. Each of the secondary batteries includes an electrode body and an outer case. The outer case has a projection that swells towards the inside so as to press the electrode body in the first direction and deforms with expansion of the electrode body.

Abstract: The method of manufacturing a secondary battery includes a layering step of forming an electrode body in which positive electrode plates and negative electrode plates are alternately layered with separators interposed in between, the layering step includes, a step of preparing a negative electrode sheet having negative electrode active material layers formed on two surfaces of a negative electrode core body, a step of forming a layered sheet by adhering a first separator and a second separator on two surfaces of the negative electrode sheet with adhesion layers in between, the layered sheet including the first separator, the negative electrode sheet, and the second separator, a step of forming a layered body by cutting the layered sheet, the layered body having two surfaces of the negative electrode plates sandwiched between the first and second separators, and a step of forming the electrode body using the layered body.

Abstract: A stack-type nonaqueous electrolyte secondary battery, includes an electrode unit housed in an exterior body. The electrode unit includes a plurality of electrode stacks and an intermediate positive electrode plate. Each of the electrode stacks includes a plurality of positive electrodes, a plurality of negative electrodes. One electrode stack of two of the electrode stacks has the negative electrode disposed adjacent to a first surface of the intermediate positive electrode plate with a corresponding one of the separators interposed therebetween. The other electrode stack has the negative electrode disposed adjacent to a second surface of the intermediate positive electrode plate with a corresponding one of the separators interposed therebetween. The intermediate positive electrode plate body has a smaller area on a side surface in a thickness direction than the positive electrode plate body of each of the electrode stacks.

Abstract: A stack-type battery includes a casing, a stacked electrode assembly housed in the casing, and a terminal to which leads extending from single-plate cells of the stacked electrode assembly are connected. The stacked electrode assembly is divided into first and second electrode assembly blocks in a stacking direction. The terminal includes a first inner terminal portion to which the leads of the first electrode assembly block are connected, a second inner terminal portion to which the leads of the second electrode assembly block are connected, and an outer terminal portion continuous with base ends of the first and second inner terminal portions and extending outside the casing. The terminal has a T-shaped side profile.

Abstract: A battery includes a stacked electrode body including a plurality of single plate cells and having a positive electrode lead-stacked part and a negative electrode lead-stacked part, the single plate cells each being formed by stacking a positive electrode and a negative electrode with a separator interposed therebetween, the positive electrode lead-stacked part being formed by stacking positive electrode leads of the positive electrodes on top of each other in stacking order of the single plate cells, the negative electrode lead-stacked part being formed by stacking negative electrode leads of the negative electrodes on top of each other in stacking order of the single plate cells; a positive electrode terminal; and a negative electrode terminal.

Abstract: A laminate battery comprising: a flat electrode assembly having a main face and a side face having a smaller area than the main face; and a laminate casing having a cup portion that is capable of housing therein the electrode assembly. The laminate casing is sealed with the electrode assembly housed in the cup portion and has a reduced pressure interior. The cup portion includes a base portion that covers the main face of the electrode assembly, a side portion that extends along the side face of the electrode assembly, and a bend portion that extends from the base portion beyond the side face of the electrode assembly, forms a bend towards the side face of the electrode assembly, and connects with the side portion. An angle of a vertex of the bend is within a range of 40° to 85° inclusive.

Abstract: In a stack type battery containing a stacked electrode assembly in which a positive electrode plate having a positive electrode current collector tab extending therefrom and a negative electrode plate having a negative electrode current collector tab extending therefrom are alternately stacked interposing a separator therebetween, a through portion for positioning that passes through in the thickness direction is formed in at least one of the positive and negative electrode current collector tab, and the width at the through portion-unformed position of the positive or negative electrode collector tab is 50 mm or more, and the width of the through portion for positioning is 10% or less of the width at the through portion-unformed position of the positive or negative electrode current collector tab.

Abstract: A laminate type battery includes a laminate battery case and an electrode assembly. The laminate battery case includes two laminate films each having a metal layer and plastic layers provided on both faces of the metal layer, and has a welded portion in which peripheral edges of the two laminate films are welded to each other. The electrode assembly is enclosed in the laminate battery case, and has a positive electrode plate, a negative electrode plate, and a separator disposed therebetween. An internal gas pressure sensing portion, in which the inner plastic layer of each of the laminate films is absent and the metal layers are in contact with each other so as to be in an electrically conductive state, is formed in a portion of the welded portion. A voltage detection hole, in which the outer plastic layer is absent and the metal layer is exposed, is formed in a surface of each of the two laminate films.

Abstract: A battery module has a plurality of prismatic batteries (2) stacked in a thickness direction. Two plates (3, 4) are provided between each of the batteries (2), and each of the batteries (2) is compressed by shifting the two plates (3, 4) in directions away from each other. A pair of frame members (10, 20) having opposing surfaces (11, 21) extending along the stacking direction of the batteries (2) are disposed face to face so as to sandwich the batteries (2) in a direction perpendicular to the stacking direction of the batteries. Wedge-shaped spacers (12, 22) inserted between the two plates (3, 4) are provided respectively on the opposing surfaces. By narrowing the gap between the pair of frame members (10, 20), the spacers (12, 22) are allowed to advance inwardly between the two plates (3, 4) so that the two plates are shifted in directions away from each other, whereby the batteries are compressed.

Abstract: A positive electrode current collector terminal (15) has an L-shape in side view having a first piece (15a) substantially parallel to positive electrode plates (1) and negative electrode plates (2) in a stacked electrode assembly (10), and a second piece (15b) substantially parallel to a stacking direction of the positive electrode plates (1) and the negative electrode plates (2) of the stacked electrode assembly (10). Positive electrode current collector leads (11) are joined to the second piece (15b) of the positive electrode current collector terminal (15), and a glass tape (20) is affixed in a staking direction-wise fore-end region (15d) of a surface of the second piece (15b) facing the laminate battery case, the staking direction being the stacking direction of the positive electrode plates (1) and the negative electrode plates (2) of the stacked electrode assembly (10).

Abstract: A stack type battery has a stacked electrode assembly (10) having a plurality of positive electrode plates having respective positive electrode current collector leads (11) protruding therefrom, a plurality of negative electrode plates (2) having respective negative electrode current collector leads protruding therefrom, and separators (3a) interposed between the positive electrode plates (1) and the negative electrode plates (2). The stacked positive electrode current collector leads (11) and the stacked negative electrode current collector leads are bundled at one stacking direction-wise side of the stacked electrode assembly (10), and a portion of the bundled leads is bent toward the other stacking direction-wise side. The positive electrode current collector leads (11) or the negative electrode current collector leads are provided with a fastening tape (46) for retaining a portion of the bundled leads in a folded shape so as to be pulled toward the positive and negative electrode plates (1, 2).

Abstract: A stack type battery has a positive electrode plate (1) having a positive electrode active material layer (1a) formed on at least one side of a current collector made of a metal plate and a positive electrode current collector lead (11) provided in a portion thereof, the positive electrode plate (1) and the positive electrode current collector lead (11) facing a negative electrode plate across a separator (3a). A protective layer (13) made of a material having a lower electron conductivity than the metal of the current collector and being non-insulative is formed at a portion of the positive electrode plate (1) between the positive electrode current collector lead (11) and the separator (3a). The positive, electrode current collector lead (11) and the separator (3a) are joined to each other by the protective layer (13).

Abstract: A stack type battery has a stacked electrode assembly (10) in which a plurality of positive electrode plates (1) and a plurality of negative electrode plates (2) are alternately stacked one another across separators. Each one of pairs of the separators adjacent to each other in a stacking direction has a bonded portion (4) in which the separators are bonded to each other in at least a portion of a perimeter portion thereof, so as to form a pouch-type separator (3). The proportion of the bonded portion (4) of one of the pouch-type separators 3 (low blocking rate pouch-type separator (3L)) located in a stacking direction-wise central region of the stacked electrode assembly (10) is made smaller than the proportion of the bonded portion (4) of each of the pouch-type separators 3 (high blocking rate pouch-type separator 3H) located in both stacking direction-wise end portions of the stacked electrode assembly (10).

Abstract: Stacked positive and negative electrode current collector tabs are bundled respectively in such a manner as to be gathered at one stacking direction-wise side (the upper end side) of the stacked electrode assembly. Portions of the bundled tabs extending from the bundled portion toward a tip side of the bundled tabs are bent toward the other stacking direction-wise side (lower end side) of the stacked electrode assembly, to form bent portions. The stacked electrode assembly is covered and fixed by an insulating sheet having insulation capability so as to cover both stacking direction-wise end faces thereof and surround the stacked electrode assembly in a tubular shape. A portion (slip-in piece) of the insulating sheet is inserted between the stacked electrode assembly and the bent portions of the positive and negative electrode current collector tabs. A portion (outer cover piece) of the insulating sheet covers the bent portions of the positive and negative electrode current collector tabs from outside.

Abstract: A stack type battery has positive electrode current collector tabs (11) overlapped with each other and welded to a positive electrode current collector terminal (15), and negative electrode current collector tabs (12) overlapped with each other and welded to a negative electrode current collector terminal (16). The positive electrode current collector tabs (11) existing between the positive electrode plates (1) and an end part (15a) of the positive electrode current collector terminal (15) that is on the positive electrode plate (1) side are welded to each other and/or the negative electrode current collector tabs (12) existing between the negative electrode plates (2) and an end part (16a) of the negative electrode current collector terminal (16) that is on a negative electrode plate (2) side are welded to each other.

Abstract: A prismatic secondary battery is a prismatic lithium-ion battery including a stack-type electrode assembly in which square positive and negative electrode plates are stacked with separators interposed therebetween. The positive electrode plates are arranged inside a bag-like separator. The width of the separator protruding from an end portion of each positive electrode plate on a non-joined side of the separator is greater than that of the separator protruding from an end portion of the positive electrode plate on a joined side of the separator. The heat-shrinkage rate of the separator in a direction vertical to the non-joined side is greater than that of the separator in a direction parallel to the non-joined side. Short circuiting between the positive and negative electrode plates due to heat shrinkage or rupture of the separator is prevented even when abnormal heat generation occurs in the battery.

Abstract: The present invention aims to provide a battery that includes electrode terminals passing through a lid, in which the lid and electrode terminals are securely insulated and sealed while being solidly fixed to each other without using an insulation-forming body or packing. To this end, a lid has upwardly-protruding protrusions formed therein. Through-holes are formed in the protrusions and tapered so as to become narrower toward the top relative to the bottom. Fitting portions forming the middle portions of a cathode terminal board and an anode terminal board are tapered to fit into the through-holes. Heat-welding tape is introduced between the outer faces of the fitting portions and the inner faces of the through-holes. The heat-welding tape is made up of an insulating substrate with heat-welding layers layered on both sides thereof.

Abstract: In a stack type battery, stacked positive and negative electrode lead tabs (11, 12) are joined to one another at a location between the current collector terminals and the electrode plates, the positive and negative electrode lead tabs (11, 12) being folded at an intermediate location between positive and negative electrode current collector terminals (15, 16) and positive and negative electrode plates and protruding from the positive and negative electrode plates. A stacked electrode assembly (10) is accommodated in a battery case (18) having flexibility. A first spacer (a first cover portion (52) of an integral-type spacer (5)) is disposed between the battery case (18) and an open side end of the positive and negative electrode lead tabs (11, 12) formed by folding the positive and negative electrode lead tabs (11, 12).