Abstract: The present application discloses a negative electrode plate including a negative electrode active material layer including a first active material layer; wherein in a first cross section in a thickness direction of the negative electrode plate, the first active material has a particle size a in a direction parallel to the metal conductive layer, the first active material has a particle size b in the thickness direction, satisfying 0.8?a/b?20; in a second cross section in the thickness direction, the first active material has a particle size c in the direction parallel to the metal conductive layer, the first active material has a particle size d in the thickness direction, satisfying 0.8?c/d?20; and the first cross section is parallel to a first direction, the second cross section is parallel to a second direction, and the first direction intersects the second direction.

Abstract: This application provides a detection method for electrode plate, a detection apparatus for electrode plate, a stacking system, a detection device, and a computer-readable storage medium, where the electrode plate includes a coated portion and an uncoated portion located on at least one side of the coated portion in a longitudinal direction. The detection method includes: step S1000: obtaining dimensional parameters D1 . . . DN at different detection positions P1 . . . PN of the uncoated portion in a transverse direction perpendicular to the longitudinal direction; and step S2000: comparing the dimensional parameters D1 . . . DN with a dimensional detection standard S to determine whether the uncoated portion is folded, where N is a positive integer, and N is greater than or equal to 2.

Abstract: A voltage regulation circuit for traction battery includes a traction battery, a heating module, a charge/discharge interface, and a voltage regulation module. The heating module includes a power storage element and a switch module. The traction battery is connected in parallel to the switch module. An external charging and discharging device is connected in parallel to the traction battery through the charge/discharge interface. The voltage regulation module includes a plurality of switches and a power storage regulation element, and the plurality of switches and the power storage regulation element are disposed between the charge/discharge interface and the traction battery. The voltage regulation module and the switch module are configured to regulate, in response to a voltage regulation control signal, a charge/discharge voltage between the traction battery and the power storage element and a charge voltage of the external charging and discharging device for the traction battery.

Abstract: The present application provides a sampling device, a battery and a power consuming apparatus. The sampling device includes a sampling circuit board. The sampling circuit board has a first sampling wire and a second sampling wire. The first sampling wire and the second sampling wire are configured to acquire different working parameters of a battery module. A continuous or discontinuous protective layer is provided on a surface of at least one of the first sampling wire and the second sampling wire, and the first sampling wire and the second sampling wire are both connected to a signal output portion provided on the sampling circuit board. In the present application, the way of surface treatment for the entire sampling line is not limited by the structure of a connection portion, thereby avoiding the problem of an increased complexity of a treatment process due to the structural limitation of the connection portion.

Abstract: Embodiments of the present disclosure provide are an extrusion coating apparatus and a battery production system. The extrusion coating apparatus includes: a first die head and a second die head connected to each other in a snap-fit manner; a flow channel formed between the first die head and the second die head, the flow channel including a feeding inlet and a discharging outlet; and at least one gasket disposed between the first die head and the second die head. The at least one gasket is disposed at two sides of the flow channel in a direction from the feeding inlet to the discharging outlet. During production, sizes of the gasket may be adjusted based on a change in speed distribution at the discharging outlet, thereby adjusting the sizes of the flow channel. By adjusting the flow channel, extrusion speed distribution is further regulated to accommodate slurries with different viscosities.

Abstract: A negative electrode plate, an electrode assembly, a battery cell, a battery, and an electrical device are disclosed. The negative electrode plate includes: a negative current collector and a negative active material layer disposed on the negative current collector. A plurality of pore channels are disposed in the negative active material layer. The technical solution of this application reduces lithium plating on a surface of the negative electrode plate, and reduces the possibility of lithium dendrites growing and piercing the separator, thereby enhancing reliability of the battery.

Abstract: The present disclosure relates to a battery cell, a battery and an electric-powered device, and the battery cell includes: an electrode assembly; a shell adapted for receiving the electrode assembly; and a cap assembly adapted for closing an opening of the shell, wherein the shell includes a first wall and two second walls opposite each other, the first wall is adapted to connect the two second walls, the first wall has a wall thickness greater than that of the second wall, the first wall is provided with a pressure relief mechanism, and the pressure relief mechanism is adapted to be activated so as to release the pressure when a gas pressure inside the shell reaches a threshold.

Abstract: A battery cell includes: a casing; an end cap assembly including an end cap body and an electrode terminal located on the end cap body; and an electrode assembly arranged in the casing and including a first electrode sheet and a second electrode sheet with opposite polarities; the first electrode sheet includes a first main portion and a first electrode tab protruding from the first main portion, and the second electrode sheet includes a second main portion and a second electrode tab protruding from the second main portion; an end of the winding body includes a first conductive region and a second conductive region, the first electrode tab is led out from the first conductive region, the second electrode tab is led out from the second conductive region, and adjacent first conductive region and second conductive region are arranged to be spaced along a radial direction of the winding body.

Abstract: An electrode assembly includes: a first electrode plate layer, a first separator, a second electrode plate layer and a second separator. A winding start end of the first electrode plate layer, a winding start end of the first separator, and a winding start end of the second separator are substantially aligned with one another. The first electrode plate layer includes a first insulating section and a first electrode plate connected to each other, and the end of the first insulating section away from the first electrode plate is the winding start end of the first electrode plate layer. Along a winding direction of the electrode assembly, the winding start end of the second electrode plate layer is substantially aligned with the winding start end of the first electrode plate layer, or is located downstream of the winding start end of the first electrode plate layer.

Abstract: Method and apparatus for detecting a defect on an insulation coating on a battery electrode plate are disclosed. The method includes: obtaining an electrode plate image obtained by photographing an electrode plate, where the electrode plate image includes at least one complete electrode plate; determining an insulation coating region and a tab region in the electrode plate image; determining a defect detection region in the insulation coating region in the electrode plate image based on the insulation coating region and the tab region; and performing defect detection on the defect detection region to obtain a defect detection result. The method implements detection on the insulation coating on the electrode plate before combination, and can detect whether a defect exists in the insulation coating region.

Abstract: A battery and an electric device are provided. The battery includes a first box portion, a second box portion, a battery cell, and an insulating liquid. The first box portion and the second box portion fit together to define an accommodating space. The battery cell is accommodated in the accommodating space. The battery cell is provided with an electrode terminal and a pressure relief mechanism. The electrode terminal is closer to the first box portion relative to the pressure relief mechanism. The pressure relief mechanism is configured to be actuated when an internal pressure or temperature of the battery cell reaches a threshold, to release the internal pressure or high-temperature gas. The insulating liquid is provided in the accommodating space and immerses the pressure relief mechanism. When the insulating liquid is provided in the accommodating space, the first box portion is located above the second box portion.

Abstract: The present application provides a sealing member, a battery, and an electrical apparatus. The sealing member includes a main body and a securing structure disposed on the main body. The securing structure is connected to a positioning structure on a member to be sealed to secure the sealing member on the member to be sealed. A surface of the securing structure facing the member to be sealed is provided with a recess, and the recess is recessed in a direction away from the positioning structure to prevent the sealing member from being fitted reversely. The sealing member provided by the present application can prevent the sealing member from being fitted reversely.

Abstract: This application provides a charging control method, a charging control device, an electronic device, and a storage medium. The charging control method includes: obtaining fastest-charge data, where a charging time in the fastest-charge data is less than or equal to a minimum charging time for a same state-of-charge (SOC) increment section in historical charging processes; and performing charging control on a battery based on the fastest-charge data. By obtaining the fastest-charge data and performing charging control on the battery based on the fastest-charge data, the charging control method according to this application can ensure that the charging time is close to or equal to the minimum charging time in historical charging processes, thereby effectively increasing the charging speed.

Abstract: The present application provides a waterproof assembly of an energy storage device, and an energy storage device. The waterproof assembly includes a boss and a wire harness cover. The boss is arranged on an outer wall of a case of a battery, and includes a first outward protruding portion that defines a first through hole in communication with the interior of the case. The wire harness cover is configured to be of a hollow cavity structure for receiving a wire harness, and is internally provided with a first recess that is configured to accommodate the first outward protruding portion to communicate the first through hole with the hollow cavity.

Abstract: A device and method for heating a battery are provided. The device is provided on a first power-consuming device and includes: a first interface electrically coupled to a neutral point of a motor winding of the first power-consuming device; a second interface electrically coupled to a negative electrode of a battery of the first power-consuming device; and a control module coupled to a control system of the first power-consuming device and a control system of a second power-consuming device to coordinate and control the first power-consuming device and the second power-consuming device. The first interface is engageable with a third interface electrically coupled to a neutral point of a motor winding of the second power-consuming device. The second interface is engageable with a fourth interface electrically coupled to a negative electrode of a battery of the second power-consuming device. The control module is configured to perform a battery heating step.

Abstract: The embodiments of the present application provide a battery cell, a method and system for manufacturing a battery cell, a battery and an electrical device. The battery cell of the embodiment includes an electrode assembly, a casing, and a first electrode terminal. The casing is for accommodating the electrode assembly, an outer surface of the casing includes an outer side surface parallel to a first direction and a first surface connected with the outer side surface, the outer side surface is arranged surrounding the electrode assembly, the first surface intersects the first direction. The first electrode terminal is convexly arranged on the first surface and for electrically connecting with the electrode assembly, the first electrode terminal does not protrude, in the first direction, from an outermost end of the first surface along the first direction.

Abstract: This application discloses a battery cell and a battery pack. The battery cell includes a housing and a bare cell located in an inner cavity of the housing. The bare cell includes at least two opposite extension ends and a middle region located between the two opposite extension ends of the bare cell. The two opposite extension ends of the bare cell are configured to be lower than the middle region of the bare cell in a height direction. The bare cell of this cell forms a structure that is high in the middle and low at edges, and a liquid level height of an electrolyte solution in the housing is below the middle region of the bare cell and above extension ends.

Abstract: A battery pack may include a first battery cell type and a second battery cell type, wherein the first battery cell type may include n first battery cells, and the second battery cell type may include m second battery cells, with n and m being each independently selected from an integer of 1 or more, wherein the second battery cell may have a discharge power at ?20° C. greater than that of the first battery cell, the difference in discharge power at ?20° C. between the second battery cells and the first battery cells being ?10 W; the percentage by number of the first battery cells in the battery cells comprised in area A may be 20% to 100%, and the percentage by number of the second battery cells in the battery cells comprised in the area B may be 5% to 100%.

Abstract: The embodiments of the present application provide a low-voltage power transmission system, a DCDC converter and a control method, a device and a medium, relating to the field of battery power. The control method includes: acquiring a charging signal; acquiring a vehicle start signal; acquiring an enabling signal; when each of the charging signal, the vehicle activating start signal, and the enabling signal is at a low level, and no communication message sent by a battery management system (BMS) is received, determining that a vehicle is in a power-off state and enters a sleep mode; when a duration of the sleep mode reaches a preset duration, performing self-awakening, and outputting, to the BMS, an awakening signal for awakening the BMS and making the BMS enter a working mode.

Abstract: A cable tie device, a cable tie connection structure, a battery, and an electrical apparatus are described. The cable tie device includes: a body part provided with a first through hole; a limiting part arranged on a first side of the body part in an extending direction of the first through hole; at least two deformable connecting bars having first ends connected to the limiting part and second ends connected to a side surface, towards the limiting part, of the body part, and distributed on the periphery of the first through hole at intervals; a first strap with a first end connected to the limiting part and a second end penetrating through the first through hole; and a second strap connected to the body part.