Abstract: This application relates to an electrode plate, an electrochemical apparatus, and an apparatus thereof. The electrode plate includes a current collector, an electrode active material layer provided on at least one surface of the current collector, and an electrical connection member electrically connected to the current collector. The electrode active material layer is provided at a zone referred to as a membrane zone on a main body portion of the current collector, the electrical connection member and the current collector are welded and connected at a welding zone referred to as an adapting welding zone at an edge of the current collector, and a transition zone is referred to as an extension zone, where the transition zone is of the current collector between the membrane zone and the adapting welding zone and coated with no electrode active material layer. The current collector is a composite current collector.

Abstract: This application relates to an electrode plate, an electrochemical apparatus, and an apparatus thereof. The electrode plate of this application includes a current collector, an electrode active material layer provided on at least one surface of the current collector, and an electrical connection member electrically connected to the current collector. The electrode active material layer is provided on a main body portion of the current collector in a zone referred to as a film zone, the electrical connection member and the current collector are welded and connected at an edge of the current collector, at a welding zone referred to as an transfer welding zone and a transition zone is referred to as an extension zone, where the transition zone is of the current collector between the film zone and the transfer welding zone, and is coated with no electrode active material layer.

Abstract: The present disclosure relates to a secondary battery and an electrode plate. The electrode plate includes a current collector, an active material layer, a conductive structure, and a first protective layer. The current collector includes an insulating layer and a conductive layer disposed on the insulating layer. The conductive layer includes a main body portion and a protrusion portion. A surface of the main body portion facing away from the insulating layer is covered by the active material layer, while a surface of the protrusion portion facing away from the insulating layer is uncovered by the active material layer. The conductive structure is welded to the protrusion portion and thus a welded zone is formed. The first protective layer has elasticity, and is disposed on a side of the protrusion portion facing away from the insulating layer and is located between the welded zone and the active material layer.

Abstract: This application relates to an electrode plate, an electrochemical apparatus, and an apparatus thereof. The electrode plate in this application includes a current collector, an electrode active material layer disposed on at least one surface of the current collector, and an electrical connection member electrically connected to the current collector. The electrode active material layer is disposed on a main body portion of the current collector at a zone referred to as a film zone, the electrical connection member and the current collector are welded and connected at an edge of the current collector at a welding zone referred to as a transfer welding zone, and a transition zone of the current collector between the film zone and the transfer welding zone, coated with no electrode active material layer, is referred to as an extension zone. The current collector is a composite current collector.

Abstract: The present application relates to an electrode member, an electrode assembly and a secondary battery. The electrode member comprises an electrode body and a conductive structure that has a first portion having an active material and a second portion extending from the first portion. The second portion comprises a main portion and a transition portion provided between the main portion and the first portion, and a width of the transition portion larger than a width of the main portion. The conductive structure is welded with the second portion and extends along a direction away from the first portion. At least a part of a welding region formed by the second portion and the conductive structure is positioned at the transition portion, thereby avoiding the overcurrent area being significantly reduced by the main portion and ensuring that every position electric current passes through have a sufficient overcurrent area.

Abstract: This application relates to an electrode plate, including a current collector and an electrode active material layer disposed on at least one surface of the current collector. The current collector includes a support layer and a conductive layer disposed on at least one surface of the support layer, where single-side thickness D2 of the conductive layer satisfies: 30 nm?D2?3 ?m, the support layer includes a polymer material or a polymer composite material, and thickness D1 of the support layer satisfies: 1 ?m?D1?20 ?m. The electrode active material layer includes an electrode active material, a binder, and a conductive agent, where total thickness Dtotal of the electrode active material layer satisfies: 200?Dtotal/D1?1, and based on total weight of the electrode active material layer, the binder content in the electrode active material layer is not less than 1 wt %.

Abstract: This application relates to the battery field, and specifically, to a positive electrode plate, an electrochemical apparatus, and an apparatus. The positive electrode plate in this application includes a current collector and an electrode active material layer disposed on at least one surface of the current collector, where the current collector includes a support layer and a conductive layer disposed on at least one surface of the support layer, a single-sided thickness D2 of the conductive layer satisfies 30 nmD23 ?m, a thickness D1 of the support layer satisfies 1 ?mD130 ?m, and the support layer is made of a polymer material or a polymer composite material; and the electrode active material layer includes an electrode active material, a binder, and a conductive agent, and a total thickness Dtotal of the electrode active material layer is not greater than 170 ?m.

Abstract: This application relates to the battery field, and specifically, to a positive electrode plate, an electrochemical apparatus, and an apparatus. The positive electrode plate in this application includes a current collector and an electrode active material layer disposed on at least one surface of the current collector, where the current collector includes a support layer and a conductive layer disposed on at least one surface of the support layer. A single-sided thickness D2 of the conductive layer satisfies 30 nm?D2?3 ?m. A thickness D1 of the support layer satisfies 1 ?m?D1?30 ?m. The support layer is made of a polymer material or a polymer composite material. The electrode active material layer includes electrode active materials, a binder, and a conductive agent.

Abstract: This application relates to the battery field, and specifically, to an electrode plate, an electrochemical device, and an apparatus. The electrode plate of this application includes a current collector and an electrode active material layer disposed on at least one surface of the current collector, where the current collector includes a support layer and a conductive layer disposed on at least one surface of the support layer, a single-sided thickness D2 of the conductive layer satisfies 30 nm?D2?3 ?m, the support layer is made of a polymer material or a polymer composite material, and a thickness D1 of the support layer satisfies 1 ?m?D1?30 ?m; and the electrode active material layer includes an electrode active material, a binder, and a conductive agent.

Abstract: A secondary battery and an electrode plate are provided. The electrode plate includes a current collector, an active material layer, a conductive structure, and a first protective layer. The current collector includes an insulating layer and a conductive layer disposed on the insulating layer. The conductive layer includes a main body portion and a protrusion portion. A surface of the main body portion facing away from the insulating layer is covered by the active material layer, while a surface of the protrusion portion facing away from the insulating layer is uncovered by the active material layer. The conductive structure is welded to the protrusion portion and thus a welded zone is formed. The first protective layer has elasticity, and is disposed on a side of the protrusion portion facing away from the insulating layer and is located between the welded zone and the active material layer.

Abstract: The present disclosure provides a secondary battery and an electrode plate. The electrode plate includes a current collector, an active material layer, and a first protective layer. The current collector includes an insulating layer and a conductive layer disposed on the insulating layer. The conductive layer has a main body portion covered by the active material layer and a protrusion portion uncovered by the active material layer. The first protective layer is disposed on a side of the protrusion portion facing away from the insulating layer. The electrode plate further includes a conductive structure, which has a connecting portion fixed on the main body portion, and a first extending portion exceeding an end of the protrusion portion away from the main body portion. The first protective layer is disposed on a side of the connecting portion close to the active material layer along a height direction.

Abstract: The electrode plate according to the present application includes a current collector and an electrode active material layer disposed on at least one surface of the current collector, wherein the current collector includes a support layer and a conductive layer disposed on at least one surface of the support layer, the conductive layer has a single-sided thickness D2 satisfying: 30 nm?D2?3 ?m; and a conductive primer layer containing a first conductive material and a binder is provided between the current collector and the electrode active material layer, and the first conductive material in the conductive primer layer comprises at least one of a one-dimensional conductive material and a two-dimensional conductive material. The electrode plate of the present application has good workability, and the electrochemical device including the electrode plate has high energy density, good electrical performance and long-term reliability.

Abstract: The electrode plate includes a current collector and an electrode active material layer disposed on at least one surface of the current collector, wherein the current collector includes a support layer and a conductive layer, the conductive layer has a single-sided thickness D2 satisfying: 30 nm?D2?3 ?m; the electrode active material layer is divided into two regions, an inner region and an outer region in a thickness direction of the electrode active material layer, in which the weight percentage of the conductive agent in the inner region of the electrode active material layer is higher than the weight percentage content of the conductive agent in the outer region of the electrode active material layer, and the conductive agent in the inner region of the electrode active material layer includes at least one of a one-dimensional conductive material and a two-dimensional conductive material.

Abstract: The present disclosure provides a secondary battery and an electrode plate thereof. The electrode member comprises an insulating substrate, a first conducting layer and an active material layer; the first conducting layer is provided on a surface of the insulating substrate, the active material layer is provided at a side of the first conducting layer away from the insulating substrate; the first conducting layer is provided with a stripe-shape groove extending in a height direction, the stripe-shape groove is used for releasing stress of the first conducting layer. The secondary battery comprises an electrode assembly, the electrode assembly comprises the electrode member.

Abstract: The present disclosure provides a secondary battery and an electrode plate thereof. The electrode plate comprises a current collector, an active material layer and a second conducting layer. The current collector comprises an insulating layer and a first conducting layer disposed on at least one surface of the insulating layer; and the active material layer is disposed on a main portion of the first conducting layer. The first conducting layer further includes a protruding portion not coated with the active material layer. The second conducting layer comprises a first portion disposed on a surface of the protruding portion of the first conducting layer opposite to the insulating layer. The secondary battery comprises an electrode assembly, the electrode assembly comprises the electrode plate.

Abstract: The electrode plate according to the present application includes a current collector and an electrode active material layer disposed on at least one surface of the current collector, wherein the current collector includes a support layer and a conductive layer, the conductive layer has a single-sided thickness D2 satisfying: 30 nm?D2?3 ?m; and the conductive agent is unevenly distributed in the electrode active material layer in a thickness direction of the electrode active material layer, in which the weight percentage of the conductive agent in the inner region of the electrode active material layer is higher than the weight percentage content of the conductive agent in the outer region of the electrode active material layer, and the binder in the inner region of the electrode active material layer includes a water-dispersible binder.

Abstract: The present disclosure provides a secondary battery, which comprises an electrode assembly, a case and a cap assembly. The electrode assembly comprises a first electrode member, a second electrode member and a separator. The case has an opening and receives the electrode assembly. The cap assembly comprises a cap plate and a first electrode terminal, the cap plate covers the opening of the case; the cap plate has an electrolyte injection hole. The first electrode member comprises a main portion, a first protruding portion and a second protruding portion, the first protruding portion is connected with an end of the main portion close to the cap plate, the second protruding portion connects the first protruding portion and the first electrode terminal. The first protruding portion extends to a lower side of the electrolyte injection hole, and a first end of the first protruding portion is beyond the second protruding portion.

Abstract: The present application relates to a secondary battery and an electrode member thereof. The electrode member includes an insulating substrate, a conducting layer and an active material layer. The conducting layer is provided on a surface of the insulating substrate, and the conducting layer includes a main portion and a protruding portion extending from the main portion, the main portion is coated with the active material layer, the protruding portion is not coated with the active material layer. The active material layer includes a first portion and a second portion, the first portion is positioned at an end of the active material layer away from the protruding portion, the second portion is positioned at a side of the first portion close to the protruding portion, and a thickness of the first portion is less than a thickness of the second portion.

Abstract: The present disclosure provides a secondary battery and an electrode plate thereof. The electrode plate comprises a current collector and an active material layer. The current collector comprises an insulating layer and a first conducting layer provided on a surface of the insulating layer; the first conducting layer has a main portion and a protruding portion connected with the main portion, the main portion is coated with the active material layer, the protruding portion is not coated with the active material layer. The electrode plate further comprises a second conducting layer, the second conducting layer comprises a first portion, the first portion is provided on a surface of the protruding portion away from the insulating layer. The secondary battery comprises an electrode assembly, the electrode assembly comprises the electrode plate.

Abstract: The present application relates to the field of battery, in particular to a positive electrode piece, an electrochemical device and an apparatus. The positive electrode piece of the present application includes a current collector and an electrode active material layer arranged on at least one surface of the current collector, where the current collector includes a support layer and a conductive layer arranged on at least one surface of the support layer. The thickness D2 of one side of the conductive layer D2 satisfies 30 nm?D2?3 ?m, the material of the conductive layer is aluminum or aluminum alloy, and the density of the conductive layer is 2.5 g/cm3 to 2.8 g/cm3, and a primer layer containing a conductive material and a binder is also arranged between the current collector and the electrode active material layer.