Provided are an electrode plate of a secondary battery, a preparation method thereof, and a secondary battery, which belong to the field of the secondary battery technologies. The electrode plate includes a current collector and a tab assembly. The tab assembly includes a first tab including a first current collector connection region that covers and is connected to an outer surface of the first conductive layer and a second tab. The first tab includes a first current collector connection region that covers and is connected to an outer surface of the first conductive layer, and the second tab includes including a second current collector connection region that covers and is connected to an outer surface of the second conductive layer. A first recessed region is defined at a connection between the tab assembly and the current collector. In the first recessed region, the first current collector connection region of the first tab and the first conductive layer are stacked with each other and both embedded in the insulation layer, and each of the first current collector connection region and the first conductive layer has a recessed outer surface. The first conductive layer is electrically connected to the second conductive layer in the first recessed region.

Provided are an electrode plate of a secondary battery, a preparation method thereof, and a secondary battery, which belong to the field of the secondary battery technologies. The electrode plate includes a current collector and a tab assembly. The tab assembly includes a first tab including a first current collector connection region that covers and is connected to an outer surface of the first conductive layer and a second tab. The first tab includes a first current collector connection region that covers and is connected to an outer surface of the first conductive layer, and the second tab includes including a second current collector connection region that covers and is connected to an outer surface of the second conductive layer. A first recessed region is defined at a connection between the tab assembly and the current collector. In the first recessed region, the first current collector connection region of the first tab and the first conductive layer are stacked with each other and both embedded in the insulation layer, and each of the first current collector connection region and the first conductive layer has a recessed outer surface. The first conductive layer is electrically connected to the second conductive layer in the first recessed region.

Disclosed are a battery, a battery module, a battery pack, and an electric vehicle. The battery includes a housing and at least two electrode core sets connected in series with each other and each including at least one electrode core (4). The electrode core (4) includes a positive plate, a negative plate, and an electrolyte located between the positive plate and the negative plate. The electrolyte is a solid electrolyte or a polymer electrolyte. Isolation layers (43) are arranged between opposite surfaces of two adjacent electrode core sets. Each isolation layer (43) is formed by curing an insulation adhesive coated on at least one of the opposite surfaces of the two adjacent electrode core sets.

Disclosed are a battery, a battery module, a battery pack, and an electric vehicle. The battery includes a housing and at least two electrode core sets connected in series with each other and each including at least one electrode core (4). The electrode core (4) includes a positive plate, a negative plate, and an electrolyte located between the positive plate and the negative plate. The electrolyte is a solid electrolyte or a polymer electrolyte. Isolation layers (43) are arranged between opposite surfaces of two adjacent electrode core sets. Each isolation layer (43) is formed by curing an insulation adhesive coated on at least one of the opposite surfaces of the two adjacent electrode core sets.

A method for bending an electrode tab is disclosed herein. The method may include: stacking an electrode and an separator to form an electrode assembly, connecting an electrode lead to an electrode tab protruding from the electrode assembly, primarily bending the electrode tab by moving a bending block disposed at one side of the electrode tab in a first direction directed toward the other side of the electrode tab, and secondarily bending the electrode tab by moving the bending block in a second direction different from the first direction.

A method for bending an electrode tab is disclosed herein. The method may include: stacking an electrode and an separator to form an electrode assembly, connecting an electrode lead to an electrode tab protruding from the electrode assembly, primarily bending the electrode tab by moving a bending block disposed at one side of the electrode tab in a first direction directed toward the other side of the electrode tab, and secondarily bending the electrode tab by moving the bending block in a second direction different from the first direction.

A battery cell includes: an electrode assembly; a case configured to accommodate the electrode assembly; a first lead electrode electrically connected to at least one of two electrode tabs of the electrode assembly; a conductive polymer including one surface that is in contact with one surface of the first lead electrode; and a second lead electrode including one surface that is in contact with the other surface of the conductive polymer, in which when a gap between the first lead electrode and the second lead electrode increases, resistance between the first lead electrode and the second lead electrode increases.

A battery cell includes: an electrode assembly; a case configured to accommodate the electrode assembly; a first lead electrode electrically connected to at least one of two electrode tabs of the electrode assembly; a conductive polymer including one surface that is in contact with one surface of the first lead electrode; and a second lead electrode including one surface that is in contact with the other surface of the conductive polymer, in which when a gap between the first lead electrode and the second lead electrode increases, resistance between the first lead electrode and the second lead electrode increases.

This application provides a battery cell, a battery, and an electric apparatus. The battery cell includes: an electrode assembly, including a body portion and a first tab. A first size L1 of the body portion in a length direction thereof is greater than a second size L2 of the body portion in a width direction thereof. The first tab is located on at least one end of the body portion in the width direction. The first tab has a third size L3 in the length direction. The first size L1, the second size L2, and the third size L3 satisfy 0.5L2≤L3≤L1. The battery cell according to an embodiment of this application is intended to resolve a technical problem of severe heat generation by a tab.

An embodiment of the present application provides a battery cell, a battery, a power consumption device, and a manufacturing device and method for a battery cell. The battery cell includes a housing, an electrode assembly, an end cover assembly and a current collecting member. The electrode assembly is accommodated in the housing, and the electrode assembly includes a tab. The end cover assembly includes an end cover, an electrode terminal and an insulating member, the end cover is used to cover at an opening of the housing, the electrode terminal is mounted to the end cover, and the insulating member is located on one side of the end cover facing the electrode assembly. The current collecting member is used to connect the electrode terminal and the tab. This structure can make more space for the electrode assembly and can effectively increase the capacity of the battery cell.