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 cover plate assembly, a battery, a battery module, a power battery pack, and an electric vehicle are disclosed. The cover plate assembly includes a cover plate body (1), a first electrode terminal (2), a second electrode terminal, and a resistive coating (3). The second electrode terminal is insulatively connected with the cover plate body (1). The first electrode terminal (2) is electrically connected with the cover plate body (1) by the resistive coating (3). The resistive coating (3) includes a weak portion (331). When a current flowing through the resistive coating (3) is greater than a predetermined threshold, the weak portion (331) is melted to disconnect the cover plate body (1) from the first electrode terminal (2).

A lithium ion battery and an electric vehicle with the same are provided. The lithium ion battery includes a cover plate assembly and a battery cell assembly, the cover plate assembly includes a pole and a polarity connecting piece, the pole is connected with the polarity connecting piece, the battery cell assembly is provided with a battery cell tab assembly, and the pole is connected and conducted with the battery cell tab assembly through the polarity connecting piece. As a hard connection, the polarity connecting piece is directly or indirectly connected with the battery cell tab assembly. The polarity connecting piece is in interference fit with the pole for laser welding, so that the connection reliability is high, the overcurrent capability is strong, and electronic conduction is easy.

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.

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.

The application provides a battery cell, a manufacturing method and a manufacturing system therefor, a battery and an electric device. The battery cell in one embodiment of the application includes a casing having an opening and provided with a pressure relief mechanism which is actuated to relieve an internal pressure or temperature of the battery cell when the internal pressure or temperature reaches a threshold value; an electrode assembly accommodated in the casing, and including a body portion and a tab portion protruding therefrom; and a cover assembly for covering the opening. A first recessed portion is formed on one side, abutting against the body portion and facing the electrode assembly, of the cover assembly. The cover assembly is provided with at least one first channel. The first channel can reduce the gas accumulated between the electrode assembly and the cover assembly, thereby reducing the safety risk.

The application provides a battery cell, a manufacturing method and a manufacturing system therefor, a battery and an electric device. The battery cell in one embodiment of the application includes a casing having an opening and provided with a pressure relief mechanism which is actuated to relieve an internal pressure or temperature of the battery cell when the internal pressure or temperature reaches a threshold value; an electrode assembly accommodated in the casing, and including a body portion and a tab portion protruding therefrom; and a cover assembly for covering the opening. A first recessed portion is formed on one side, abutting against the body portion and facing the electrode assembly, of the cover assembly. The cover assembly is provided with at least one first channel. The first channel can reduce the gas accumulated between the electrode assembly and the cover assembly, thereby reducing the safety risk.

A rechargeable battery according to an embodiment of the present invention includes: an electrode assembly; a case for receiving the electrode assembly; a cap plate combined to an opening of the case to close and seal an inside of the case and including a plurality of vent units; an elevation member penetrated and installed in the cap plate and moving by an internal pressure of the case; and a plurality of vent plates for closing and sealing the respective vent units, wherein the vent plate is connected to the elevation member through a connection member and links to the elevation member.

A rechargeable battery according to an embodiment of the present invention includes: an electrode assembly; a case for receiving the electrode assembly; a cap plate combined to an opening of the case to close and seal an inside of the case and including a plurality of vent units; an elevation member penetrated and installed in the cap plate and moving by an internal pressure of the case; and a plurality of vent plates for closing and sealing the respective vent units, wherein the vent plate is connected to the elevation member through a connection member and links to the elevation member.