Adhesive film for metal terminals, method for manufacturing adhesive film for metal terminals, metal terminal with adhesive film for metal terminals, energy storage device, and method for manufacturing energy storage device

Abstract

This adhesive film for metal terminals is interposed between a metal terminal that is electrically connected to an electrode for a power storage device element, and a power storage device exterior material that seals the power storage device element. The adhesive film for metal terminals is constituted of a laminate comprising at least a resin layer A and a resin layer B. The resin layer A has a melting peak temperature of 105-130°C. The resin layer B has a cross-sectional hardness, measured in an environment with a temperature of 110°C, of at least 15 N / mm2.

Claims

1. An adhesive film for metal terminals, interposed between a metal terminal electrically connected to the electrode of a power storage device element and an outer casing material for a power storage device that seals the power storage device element, The aforementioned adhesive film for metal terminals is composed of a laminate comprising at least a resin layer A and a resin layer B. The resin layer A has a melting peak temperature of 105°C or higher and 130°C or lower. The resin layer B has a cross-sectional hardness of 15 N / mm² measured at a temperature of 110°C. 2 The above describes the adhesive film for metal terminals.

2. The adhesive film for metal terminals according to claim 1, wherein the resin layer A is at least one outermost layer of the adhesive film for metal terminals.

3. The adhesive film for metal terminals according to claim 1 or 2, wherein the resin layer B is not the outermost layer of the adhesive film for metal terminals.

4. The adhesive film for metal terminals is composed of a laminate comprising, in this order, a first polyolefin layer disposed on the metal terminal side, a substrate, and a second polyolefin layer disposed on the exterior material side for the energy storage device. The adhesive film for metal terminals according to claim 1 or 2, wherein at least one of the first polyolefin layer and the second polyolefin layer is the resin layer A.

5. The adhesive film for metal terminals according to claim 4, wherein the substrate is the resin layer B.

6. The adhesive film for metal terminals according to claim 4, wherein at least one of the first polyolefin layer and the second polyolefin layer comprises an acid-modified polyolefin.

7. The adhesive film for metal terminals according to claim 4, wherein the substrate comprises a polyolefin skeleton.

8. The adhesive film for metal terminals according to claim 4, wherein the first polyolefin layer and the substrate are in contact, and the second polyolefin layer and the substrate are in contact.

9. A method for manufacturing an adhesive film for metal terminals, which is interposed between a metal terminal electrically connected to the electrode of an energy storage device element and an outer casing material for an energy storage device that seals the energy storage device element, The aforementioned adhesive film for metal terminals is composed of a laminate comprising at least a resin layer A and a resin layer B. The resin layer A has a melting peak temperature of 105°C or higher and 130°C or lower. The resin layer B has a cross-sectional hardness of 15 N / mm² measured at a temperature of 110°C. 2 The above describes a method for manufacturing adhesive films for metal terminals.

10. A metal terminal with an adhesive film for metal terminals, wherein the adhesive film for metal terminals described in claim 1 or 2 is attached to the metal terminal.

11. A power storage device comprising at least a positive electrode, a negative electrode, and an electrolyte; an outer casing material for the power storage device that seals the power storage device element; and metal terminals electrically connected to the positive electrode and the negative electrode, respectively, and protruding to the outside of the outer casing material for the power storage device, An energy storage device comprising an adhesive film for metal terminals according to claim 1 or 2 interposed between the metal terminal and the exterior material for the energy storage device.

12. A power storage device comprising at least a positive electrode, a negative electrode, and an electrolyte; an outer casing material for the power storage device that seals the power storage device element; and metal terminals electrically connected to the positive electrode and the negative electrode, respectively, and protruding from the outer casing material for the power storage device, A metal terminal adhesive film is interposed between the metal terminal and the exterior material for the energy storage device. The aforementioned adhesive film for metal terminals is composed of a laminate comprising at least a resin layer A and a resin layer B. The resin layer A has a melting peak temperature of 105°C or higher and 130°C or lower. The resin layer B has a cross-sectional hardness of 15 N / mm² or more, measured in an environment of 110°C. In an environment with a temperature of 100°C to 130°C, the energy storage device is an energy storage device that is opened from the position where the resin layer A of the adhesive film for metal terminals is laminated.

13. A power storage device comprising at least a positive electrode, a negative electrode, and an electrolyte; an outer casing material for the power storage device that seals the power storage device element; and metal terminals electrically connected to the positive electrode and the negative electrode, respectively, and protruding from the outer casing material for the power storage device, A metal terminal adhesive film is interposed between the metal terminal and the exterior material for the energy storage device. The aforementioned adhesive film for metal terminals is composed of a laminate comprising at least a resin layer A and a resin layer B. The resin layer A has a melting peak temperature of 105°C or higher and 130°C or lower. The resin layer B has a cross-sectional hardness of 15 N / mm² measured at a temperature of 110°C. 2 That's all. The exterior material for the energy storage device is composed of a laminate comprising at least a base layer, a barrier layer, and a heat-sealable resin layer. An energy storage device in which the melting peak temperature of the heat-fusible resin layer is 130°C or higher.

14. An outer casing material for energy storage devices, The energy storage device comprises at least an energy storage device element having a positive electrode, a negative electrode, and an electrolyte; an outer casing material for the energy storage device that seals the energy storage device element; and metal terminals electrically connected to the positive electrode and the negative electrode, respectively, and protruding from the outer casing material for the energy storage device. A metal terminal adhesive film is interposed between the metal terminal and the exterior material for the energy storage device. The aforementioned adhesive film for metal terminals is composed of a laminate comprising at least resin layer A and resin layer B, and has a function to open from the position where resin layer A is laminated in an environment with a temperature of 100°C to 130°C. The resin layer A has a melting peak temperature of 105°C or higher and 130°C or lower. The resin layer B has a cross-sectional hardness of 15 N / mm² or more, measured in an environment of 110°C. The exterior material for the energy storage device is composed of a laminate comprising at least a base layer, a barrier layer, and a heat-fusible resin layer, wherein the melting peak temperature of the heat-fusible resin layer is higher than the melting peak temperature of the resin layer A of the adhesive film for the metal terminals and is 130°C or higher.

15. An adhesive film for metal terminals used in energy storage devices, The energy storage device comprises at least an energy storage device element having a positive electrode, a negative electrode, and an electrolyte; an outer casing material for the energy storage device that seals the energy storage device element; and metal terminals electrically connected to the positive electrode and the negative electrode, respectively, and protruding from the outer casing material for the energy storage device. The adhesive film for the metal terminal is interposed between the metal terminal and the exterior material for the energy storage device. The aforementioned adhesive film for metal terminals is composed of a laminate comprising at least resin layer A and resin layer B, and has a function to open from the position where resin layer A is laminated in an environment with a temperature of 100°C to 130°C. The resin layer A has a melting peak temperature of 105°C or higher and 130°C or lower. The resin layer B has a cross-sectional hardness of 15 N / mm² or more, measured in an environment of 110°C. The exterior material for the energy storage device is composed of a laminate comprising at least a base layer, a barrier layer, and a heat-sealable resin layer, wherein the melting peak temperature of the heat-sealable resin layer is higher than the melting peak temperature of the resin layer A of the adhesive film for metal terminals and is 130°C or higher.

16. A method for manufacturing an energy storage device comprising at least a positive electrode, a negative electrode, and an electrolyte; an outer casing material for the energy storage device that seals the energy storage device element; and metal terminals electrically connected to the positive electrode and the negative electrode, respectively, and protruding from the outer casing material for the energy storage device, A method for manufacturing an energy storage device, comprising the step of interposing an adhesive film for metal terminals according to claim 1 or 2 between the metal terminals and the exterior material for the energy storage device, and sealing the energy storage device element with the exterior material for the energy storage device.

17. A kit comprising an exterior material for energy storage devices for use in energy storage devices and an adhesive film for metal terminals according to claim 1 or 2, The energy storage device comprises at least an energy storage device element having a positive electrode, a negative electrode, and an electrolyte; an outer casing material for the energy storage device that seals the energy storage device element; and metal terminals electrically connected to the positive electrode and the negative electrode, respectively, and protruding from the outer casing material for the energy storage device. A kit used in which, when in use, the adhesive film for metal terminals is interposed between the metal terminals and the outer material for the energy storage device.

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