A technology for improving molding properties while minimizing curling after molding in a battery packaging material comprising a laminate that is provided with a barrier layer, a heat-sealable resin layer positioned on one surface side of the barrier layer, and a polyester film positioned on the other surface side of the barrier layer. This battery packaging material is configured from at least a laminate provided with a barrier layer, a heat-sealable resin layer positioned on one surface side of the barrier layer, and a polyester film positioned on the other surface side of the barrier layer. The birefringence of the polyester film is in the range of 0.016-0.056.

A technology for improving molding properties while minimizing curling after molding in a battery packaging material comprising a laminate that is provided with a barrier layer, a heat-sealable resin layer positioned on one surface side of the barrier layer, and a polyester film positioned on the other surface side of the barrier layer. This battery packaging material is configured from at least a laminate provided with a barrier layer, a heat-sealable resin layer positioned on one surface side of the barrier layer, and a polyester film positioned on the other surface side of the barrier layer. The birefringence of the polyester film is in the range of 0.016-0.056.

A cell includes a positive electrode plate, a negative electrode plate, and a separator. An insulating adhesive tape is attached to the positive electrode plate. A first adhesive-tape surface of the insulating adhesive tape is disposed on a same side as a first positive-electrode-plate surface of the positive electrode plate. The first positive-electrode-plate surface is arranged between the first adhesive-tape surface and the second adhesive-tape surface in the first direction. The second adhesive-tape surface is arranged between the first positive-electrode-plate surface and the second positive-electrode-plate surface in the first direction. The insulating adhesive tape extends from the first positive-electrode-plate end to the second positive-electrode-plate end in the second direction. A battery module, a battery pack, and a vehicle including same are also provided.

A cell includes a positive electrode plate, a negative electrode plate, and a separator. An insulating adhesive tape is attached to the positive electrode plate. A first adhesive-tape surface of the insulating adhesive tape is disposed on a same side as a first positive-electrode-plate surface of the positive electrode plate. The first positive-electrode-plate surface is arranged between the first adhesive-tape surface and the second adhesive-tape surface in the first direction. The second adhesive-tape surface is arranged between the first positive-electrode-plate surface and the second positive-electrode-plate surface in the first direction. The insulating adhesive tape extends from the first positive-electrode-plate end to the second positive-electrode-plate end in the second direction. A battery module, a battery pack, and a vehicle including same are also provided.

The present application discloses a rechargeable lithium battery apparatus, comprising a battery cell in a cylindrical shape, a positive electrode of the battery cell has a protection circuit board arranged, wherein, between the positive electrode of the battery cell in the cylindrical shape and a positive electrode of the protection circuit board, there is a metal screw connection structure arranged, acting as the positive electrode of the protection circuit board, connecting electrically to the positive electrode of the battery cell. The rechargeable lithium battery apparatus of the present application, due to adopting a metal screw connection structure arranged on a circuit board at the positive electrode of the battery, corresponding to the positive electrode of the battery cell, achieves a positive electrode cap and a solid connection between the protection circuit board and the battery cell, forming a brand new lithium battery apparatus.

The present application discloses a rechargeable lithium battery apparatus, comprising a battery cell in a cylindrical shape, a positive electrode of the battery cell has a protection circuit board arranged, wherein, between the positive electrode of the battery cell in the cylindrical shape and a positive electrode of the protection circuit board, there is a metal screw connection structure arranged, acting as the positive electrode of the protection circuit board, connecting electrically to the positive electrode of the battery cell. The rechargeable lithium battery apparatus of the present application, due to adopting a metal screw connection structure arranged on a circuit board at the positive electrode of the battery, corresponding to the positive electrode of the battery cell, achieves a positive electrode cap and a solid connection between the protection circuit board and the battery cell, forming a brand new lithium battery apparatus.

A member for a non-aqueous electrolyte battery containing a copolymer containing a tetrafluoroethylene unit and a fluoroalkyl vinyl ether unit, in which the number of functional groups per 10.sup.6 carbon atoms of a main chain of the copolymer is 100 or less, and a melt flow rate of the copolymer is less than 20 g/10 minutes.

A power storage assembly having a gasket containing a copolymer containing a tetrafluoroethylene unit and a fluoro(alkyl vinyl ether) unit, wherein the copolymer has a content of the fluoro(alkyl vinyl ether) unit of 2.0 to 6.0% by mass with respect to the whole of the monomer units, a melt flow rate of 0.5 to 55 g/10 min, and the number of functional groups of 50 or less per 10.sup.6 main-chain carbon atoms.

The present invention aims to provide an all-solid-state lithium ion secondary battery having a high reliability which does not have a decrease in battery capacity due to absorption of moisture in the air. The all-solid-state lithium ion secondary battery is provided with a battery body having an electrolyte layer between a positive electrode layer and a negative electrode layer, a pair of terminal electrodes respectively connected to the positive electrode layer and the negative electrode layer at both end portions of the battery body, and a moisture-proof layer disposed on surfaces excluding the surfaces to be the terminal electrodes, wherein the moisture-proof layer contains a cured product of a composition containing a polymer compound and metal compound particles.

A secondary battery with an exterior body having a novel scaling structure, and a structure of a sealing portion that relaxes a stress of deformation are provided. The secondary battery includes a positive electrode, a negative electrode, an electrolyte solution, and an exterior body enclosing at least part of the positive electrode, at least part of the negative electrode, and the electrolyte solution. The exterior body includes a first region having a shape with a curve, a shape with a wavy line, a shape with an arc, or a shape with a plurality of inflection points, and a second region having the same shape as the first region. The first region is in contact with the second region. Alternatively, the first region has a shape without a straight line. The secondary battery may be flexible, and the exterior body in a region having flexibility may include the first region.