Provided is a solid electrolyte-containing layer capable of preventing a short circuit caused by the formation of a dendrite. A solid electrolyte-containing layer (50a) in accordance with an aspect of the present invention includes: an inorganic solid electrolyte; and a heat-resistant resin having ion conductivity.

Provided is a solid electrolyte-containing layer capable of preventing a short circuit caused by the formation of a dendrite. A solid electrolyte-containing layer (50a) in accordance with an aspect of the present invention includes: an inorganic solid electrolyte; and a heat-resistant resin having ion conductivity.

An electrode body includes a substrate serving as a collector, a composite layer formed by applying a composite paste including an electrode active material to the substrate, and an insulation layer formed by applying an insulation paste including an insulative material to the substrate adjacent to the composite layer. The composite layer extends above and overlaps the insulation layer that covers a surface of the substrate in an interface region of the composite layer and the insulation layer. A mixed layer is formed between the insulation layer and the composite layer when the composite paste and the insulation paste mix in an overlapping range of the insulation layer and the composite layer. The mixed layer is formed in a range where the insulation layer covers the surface of the substrate.

An electrode body includes a substrate serving as a collector, a composite layer formed by applying a composite paste including an electrode active material to the substrate, and an insulation layer formed by applying an insulation paste including an insulative material to the substrate adjacent to the composite layer. The composite layer extends above and overlaps the insulation layer that covers a surface of the substrate in an interface region of the composite layer and the insulation layer. A mixed layer is formed between the insulation layer and the composite layer when the composite paste and the insulation paste mix in an overlapping range of the insulation layer and the composite layer. The mixed layer is formed in a range where the insulation layer covers the surface of the substrate.

A current collector protective glue includes a solvent and an adhesive. The solvent is selected from one or more of water, ethanol, NMP, acetone, and butanone. The adhesive is selected from one or more of cellulose, polyacrylic acid, styrene-butadiene rubber, styrene butadiene rubber, and nitrile rubber.

A secondary battery includes a positive electrode having a positive electrode current collector and a positive electrode active material layer; a negative electrode having a negative electrode current collector and a negative electrode active material layer; a separator interposed between the electrodes; a electrolyte; a positive electrode lead; and an insulating tape that covers part of the positive electrode. The positive electrode current collector has an exposed portion connected to the positive electrode lead. The positive electrode lead has an extending portion that projects from the exposed portion and an overlapping portion that overlaps the exposed portion. At least part of the exposed portion and at least part of the overlapping portion are covered with the insulating tape. The insulating tape has a substrate layer and an adhesive layer. The substrate layer contains a polyimide. The adhesive layer has an electrical resistance of 1 kΩ/mm.sup.2 or more at 500° C.

An insulation-coating overlay control system, an electrode plate for a secondary battery, and an insulation-coating overlay control method are provided. I system includes an insulation coater configured to coat an insulating material to allow the insulating material to cover a partial region of a coated part and a non-coated part in an electrode plate along a boundary part. The coated part has an electrode slurry coated thereon and the non-coated part does not have the electrode slurry coated thereon. An insulation-coating width measuring means is configured to measure an overlay width. An insulation coater moving means is configured to move the insulation coater and a controller is configured to control the insulation coater moving means to adjust the overlay width by comparing the measured overlay width with a predetermined overlay width setting range or an overlay width reference value.

An insulation-coating overlay control system, an electrode plate for a secondary battery, and an insulation-coating overlay control method are provided. I system includes an insulation coater configured to coat an insulating material to allow the insulating material to cover a partial region of a coated part and a non-coated part in an electrode plate along a boundary part. The coated part has an electrode slurry coated thereon and the non-coated part does not have the electrode slurry coated thereon. An insulation-coating width measuring means is configured to measure an overlay width. An insulation coater moving means is configured to move the insulation coater and a controller is configured to control the insulation coater moving means to adjust the overlay width by comparing the measured overlay width with a predetermined overlay width setting range or an overlay width reference value.

Disclosed is a battery cell having an electrode tab with an enhanced safety, and a battery module, a battery pack and a vehicle including the same. The battery cell includes an electrode assembly including a cell body and an electrode tab provided to at least one of both sides of the cell body, a cell case configured to accommodate the electrode assembly therein, an electrode lead drawn out of the cell case by a predetermined length and connected to the electrode assembly through the electrode tab, and a tab protection module accommodated in the cell case and configured to cover at least a part of the electrode tab.

Embodiments of the present disclosure relates to an electrode assembly, a secondary battery, a battery pack and a device. The electrode assembly includes: an electrode unit including an electrode body and an electrode terminal part electrically connected with the electrode body; and a first insulating film for being wound around the electrode unit, the first insulating film including a connection part and an extension part connected with each other, the connection part being provided with an adhesive area for connecting with the electrode terminal part, the extension part being a part of the first insulating film extending beyond an end face of the electrode terminal part, and at least part of the extension part being provided as a non-adhesive area.