Abstract: An electrode body of a secondary battery described herein includes: a core portion where electrode mixture layers of a plurality of electrode sheets are laminated; terminal connecting portions where respective current collector foil exposed portions are laminated, and a mixture layer non-facing portion where the electrode mixture layer faces the current collector foil exposed portion, the mixture layer non-facing portion being formed in a boundary between the terminal connecting portion and the core portion. In the secondary battery described herein, a short-circuit promoting portion having a predetermined depth (d) is formed in a separator provided between the electrode sheets in the mixture layer non-facing portion.

Abstract: A battery module includes a plurality of units and a restraint member. The plurality of units are arranged side by side in a first direction. The restraint member restrains the plurality of units in the first direction. Each of the plurality of units includes a plurality of battery cells and a case. The plurality of battery cells are arranged side by side in the first direction and each of the plurality of battery cells has a prismatic shape. The case accommodates the plurality of battery cells and supports the plurality of battery cells in the first direction.

Abstract: Each of a plurality of units includes a plurality of battery cells and a supporting member. The plurality of battery cells are arranged side by side in the first direction and each of the plurality of battery cells has a prismatic shape. The supporting member supports the plurality of battery cells. Each of the plurality of battery cells has a housing having an upper surface on which an electrode terminal is disposed and a lower surface facing the upper surface along a second direction orthogonal to the first direction. When each of the plurality of units is placed on the first plane, the supporting member is capable of supporting the plurality of battery cells such that the second direction is substantially parallel to a normal direction of the first plane and the electrode terminal is oriented in a direction away from the first plane.

Abstract: A battery module includes: a plurality of battery cells stacked in a predetermined direction; and a plurality of bus bars that electrically connect the plurality of battery cells together. The plurality of bus bars include a first bus bar extending between a first battery cell and a second battery cell of the plurality of battery cells, the first battery cell and the second battery cell being adjacent to each other in the predetermined direction. The first bus bar has a first base portion connected to the first battery cell, a second base portion connected to the second battery cell, and a rising portion that has a shape to rise from the first base portion and the second base portion and that connects between the first base portion and the second base portion. A fragile portion is provided in a root region of the rising portion.

Abstract: A battery module includes: a plurality of battery cells arranged side by side in a first direction, each of the plurality of battery cells having a prismatic shape; and a partition wall portion provided between the plurality of battery cells to secure electrical insulation between the plurality of battery cells. The partition wall portion includes a first partition wall portion and a second partition wall portion, the first partition wall portion and the second partition wall portion being provided alternately, the second partition wall portion having a shape different from a shape of the first partition wall portion, the second partition wall portion forming a cooling space between the second partition wall portion and each of two battery cells located on both sides beside the second partition wall portion in the first direction.

Abstract: A battery module includes: a plurality of battery cells arranged side by side in a first direction, each of the plurality of battery cells having a prismatic shape; a restraint mechanism that restrains the plurality of battery cells in the first direction; and a restraint force adjustment mechanism capable of adjusting a restraint load in the first direction, the restraint load being applied by the restraint mechanism. The restraint force adjustment mechanism includes an operation portion to be operated when adjusting the restraint load. The operation portion is provided on the battery module.

Abstract: A battery module includes: a plurality of battery cells stacked in a predetermined direction and electrically connected together; a plurality of bus bars that electrically connect the plurality of battery cells together; and a plurality of voltage detection wires each connected to one set of two or more battery cells electrically connected together. According to the battery module, the number of the voltage detection wires is reduced, thereby attaining reduced sizes of the bus bars, productivity improved by improved workability, and reduced cost.

Abstract: A battery module includes: a plurality of battery cells stacked in a predetermined direction; a restraint member that applies, to the plurality of battery cells, restraint force along the predetermined direction; and a plurality of bus bars that electrically connects the plurality of battery cells together, the plurality of bus bars including a first bus bar and a second bus bar. The first bus bar has a first joining portion that joins separated members to each other by a first joining form, and connects, via the first joining portion, between battery cells adjacent to each other in the predetermined direction. The second bus bar has a second joining portion that joins separated members to each other by a second joining form different from the first joining form, and connects, via the second joining portion, between battery cells adjacent to each other in the predetermined direction.

Abstract: An electrode body of a secondary battery described herein includes: a core portion where electrode mixture layers of a plurality of electrode sheets are laminated; terminal connecting portions where respective current collector foil exposed portions are laminated, and a mixture layer non-facing portion where the electrode mixture layer faces the current collector foil exposed portion, the mixture layer non-facing portion being formed in a boundary between the terminal connecting portion and the core portion. In the secondary battery described herein, a short-circuit promoting portion having a predetermined depth (d) is formed in a separator provided between the electrode sheets in the mixture layer non-facing portion.

Abstract: An electrode body of a secondary battery described herein includes: a core portion where electrode mixture layers of a plurality of electrode sheets are laminated; terminal connecting portions where respective current collector foil exposed portions are laminated, and a mixture layer non-facing portion where the electrode mixture layer faces the current collector foil exposed portion, the mixture layer non-facing portion being formed in a boundary between the terminal connecting portion and the core portion. In the secondary battery described herein, a short-circuit promoting portion having a predetermined depth (d) is formed in a separator provided between the electrode sheets in the mixture layer non-facing portion.

Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, a first separator layer provided between the positive electrode and the negative electrode, the first separator layer facing the positive electrode, a second separator layer provided between the positive electrode and the negative electrode, the second separator layer facing the negative electrode, and a non-aqueous electrolyte held in the first separator layer and the second separator layer. The variable ? represents the porosity of the first separator layer, and the variable ? represents the porosity of the second separator layer, such that ??90% and the following expression is satisfied: 2??/??2.85.

Abstract: This invention relates to a conductive paste for lithium-ion battery positive electrodes and a mixture paste for a lithium ion battery positive electrode that have an easy-to-apply viscosity, even when a relatively small amount of a dispersion resin is incorporated. More specifically, the invention provides a conductive paste for lithium-ion battery positive electrodes, the conductive paste comprising a dispersion resin (A), conductive carbon (B), and a solvent (C), the dispersion resin (A) containing a resin (A1), the resin (A1) containing, as one constituent component, a polymerizable unsaturated group-containing monomer (A1-1) represented by a specific formula.

Abstract: The present invention provides a conductive paste for positive electrodes of lithium-ion batteries and mixture paste for positive electrodes of lithium-ion batteries that have an easy-to-apply viscosity, even when a relatively small amount of a dispersant is incorporated. More specifically, the present invention provides a conductive paste for positive electrodes of lithium-ion batteries containing a dispersion resin (A), conductive carbon (B), and a solvent (C), the dispersion resin (A) being a copolymer of a monomer mixture comprising a polycyclic aromatic hydrocarbon-containing monomer (A-1) in an amount of 1 to 70 mass %, based on the total solids content.

Abstract: A nonaqueous electrolyte secondary battery includes an electrode body that has a positive electrode, a negative electrode, and a separator provided between the positive electrode and the negative electrode. A nonaqueous electrolyte is held at least in the separator. In at least a part of the separator, an amount of change in a thickness of the separator at a time of restraint at 10 MPa is 50% or more.

Abstract: A battery according to the invention includes, as a separator, a first separator and a second separator having mutually different characteristics. The first separator and the second separator are disposed inside an electrode assembly in a state where the separators are not in contact with each other in a stacking direction of the electrode assembly.

Abstract: An apparatus for controlling a lithium-ion battery is provided in which a power-generating element including a positive electrode element and a negative electrode element is housed in a case, wherein the case contains a compound releasing an electron toward the positive electrode element to provide a proton at an electric potential lower than a first electric potential being a positive electrode potential corresponding to a negative electrode potential at which precipitation of lithium occurs, the electric potential lower than the first electric potential being a second electric potential and being higher than a positive electrode potential corresponding to an upper limit value of working voltages of the lithium-ion battery, and the apparatus includes a controller configured to perform recovery processing of changing the lithium precipitated on the negative electrode element into a lithium ion using the proton by using a power source section supplying a power to the lithium-ion battery to bring the positive e

Abstract: A non-aqueous electrolyte battery system includes a battery voltage output section for outputting a voltage of a non-aqueous electrolyte secondary battery and a freezing determination section for performing freezing determination to a non-aqueous electrolyte. In the freezing determination, the freezing determination section executes freezing determination current control for supplying a current at a freezing determination current value at a freezing determination time in a direction to charge the non-aqueous electrolyte secondary battery. When a voltage value output from the battery voltage output section exhibits a transition that rises once to a peak value during execution of the freezing determination current control, and then decreases with time, it is determined that the non-aqueous electrolyte is in a frozen state.

Abstract: This invention relates to a conductive paste for lithium-ion battery positive electrodes and a mixture paste for a lithium ion battery positive electrode that have an easy-to-apply viscosity, even when a relatively small amount of a dispersion resin is incorporated. More specifically, the invention provides a conductive paste for lithium-ion battery positive electrodes, the conductive paste comprising a dispersion resin (A), conductive carbon (B), and a solvent (C), the dispersion resin (A) containing a resin (A1), the resin (A1) containing, as one constituent component, a polymerizable unsaturated group-containing monomer (A1-1) represented by a specific formula.

Abstract: The present invention provides a non-aqueous electrolyte secondary battery having an electrode body formed by stacking a positive electrode, a separator and a negative electrode and a non-aqueous electrolyte. The separator has a separator substrate made and a first porous heat resistance layer formed on a surface of the substrate on a side facing the positive electrode. A surface of the negative electrode on a side facing the separator is formed by a second porous heat resistance layer. The first and second porous heat resistance layers satisfy: (1) an average thickness of the first porous heat resistance layer is greater than that of the second porous heat resistance layer; (2) an average particle diameter of an inorganic filler contained in the first porous heat resistance layer is greater than that of an inorganic filler contained in the second porous heat resistance layer.

Abstract: The present invention provides a conductive paste for positive electrodes of lithium-ion batteries and mixture paste for positive electrodes of lithium-ion batteries that have an easy-to-apply viscosity, even when a relatively small amount of a dispersant is incorporated. More specifically, the present invention provides a conductive paste for positive electrodes of lithium-ion batteries containing a dispersion resin (A), conductive carbon (B), and a solvent (C), the dispersion resin (A) being a copolymer of a monomer mixture comprising a polycyclic aromatic hydrocarbon-containing monomer (A-1) in an amount of 1 to 70 mass %, based on the total solids content.