Abstract: The present invention discloses a negative plate, a secondary battery including the negative plate, and an electric device. The negative plate of the present invention comprises a negative current collector and an anode active material layer. The anode active material layer comprising an anode active material. The negative plate satisfies the following relationship: ?1.75?lg(WAl×WS/?)?1.05, 0.2?lg(WS×R)+0.15×R?2.5, where WAl and WS are mass fractions of aluminum and sulfur respectively; ? is a contact angle of the anode active material layer with a mixed solvent of ethylene carbonate and methyl ethyl carbonate; and R is an ion transport impedance of the negative plate. When the negative plate of the present invention is applied to the secondary battery, cracking of the negative plate during charging and discharging can be significantly reduced, thereby improving the cycle performance of the battery and also improving the capacity retention rate of the battery during low-temperature cycling.

Abstract: The present invention discloses a negative electrode sheet, a secondary battery including the negative electrode sheet, and an electric device, and belongs to the technical field of batteries. The negative electrode sheet of the present invention includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer includes an negative electrode active material, the negative electrode sheet satisfies an equation as follows: 0.15?(F×ps)/(?×100)?10, where F is a cohesive force of the negative electrode sheet, in the unit of N/m; ps is a particle size change rate of the negative electrode active material, in the unit of %; and ? is a compaction density of the negative electrode sheet, in the unit of g/cm3.

Abstract: A negative plate, a secondary battery and an electrical device, which fall within the technical field of batteries, wherein the negative plate includes a negative current collector and an anode active material layer provided on a surface of the negative current collector, the anode active material layer includes an anode active material, the anode active material includes graphite, and the negative plate satisfies the following relationship: a=ln(DFW)+10×ln(DV50)+?(La)+26.5, b=PD, a/45?b?0.05. By reasonably controlling a particle diameter distribution of the anode active material in the negative plate, as well as a crystal size and a compacted density of the negative plate, the negative plate of the present disclosure maintains good wettability at a higher compacted density and has good liquid absorption capacity for an electrolyte solution, and a battery containing the negative plate has excellent cycle life.

Abstract: The disclosure discloses a negative electrode sheet, a secondary battery and an electrical device, belonging to the technical field of batteries. The negative electrode sheet of the disclosure includes a negative electrode current collector and a negative electrode active material layer disposed on at least one surface of the negative electrode current collector, in which the negative electrode active material layer includes a negative electrode active material, the negative electrode active material includes graphite, and the negative electrode sheet satisfies an equation as follows: 1.0×10?3?(|La1?La2|/Lax)/(VOI×DV50)?3.0×10?3.

Abstract: An automatic charging vehicle, a method for operating the automatic charging vehicle, and an automatic charging system. The automatic charging vehicle includes: an automatic traveling module, which is configured to move, according to a route between the automatic charging vehicle and a device to be charged, to the device to be charged; a power module, which is configured to store and provide electric energy; and an automatic docking and separating device, which is configured to execute docking and separating between a first connector and a second connector capable of being in electrical contact with the first connector, the first connector and the second connector being used for transmitting electric energy.

Abstract: A charging adapter for electric vehicle includes a connecting mechanism, a control board, a charging plug, a charging socket, a locking pressure plate and an electromagnet iron. The control board monitors the temperature change inside the charging adapter and control the switch-off. The charging plug and the charging socket are installed at two ends of the connecting mechanism respectively. When used, the charging plug is connected to a charging socket of the electric vehicle, and the charging socket is connected to a charging gun to activate an operating control system of the electric vehicle. The locking pressure plate is installed in a surface of the end of connection mechanism near the charging plug. The electromagnet iron is installed inside the connection mechanism and located under the locking pressure plate, and is combined with the locking pressure plate to lock the charging adapter with the charging socket of the electric vehicle.

Abstract: A charging adapter for electric vehicle includes a connecting mechanism, a control board, a charging plug, a charging socket, a locking pressure plate and an electromagnet iron. The control board monitors the temperature change inside the charging adapter and control the switch-off. The charging plug and the charging socket are installed at two ends of the connecting mechanism respectively. When used, the charging plug is connected to a charging socket of the electric vehicle, and the charging socket is connected to a charging gun to activate an operating control system of the electric vehicle. The locking pressure plate is installed in a surface of the end of connection mechanism near the charging plug. The electromagnet iron is installed inside the connection mechanism and located under the locking pressure plate, and is combined with the locking pressure plate to lock the charging adapter with the charging socket of the electric vehicle.

Abstract: An automatic charging vehicle, a method for operating the automatic charging vehicle, and an automatic charging system. The automatic charging vehicle includes: an automatic traveling module, which is configured to move, according to a route between the automatic charging vehicle and a device to be charged, to the device to be charged; a power module, which is configured to store and provide electric energy; and an automatic docking and separating device, which is configured to execute docking and separating between a first connector and a second connector capable of being in electrical contact with the first connector, the first connector and the second connector being used for transmitting electric energy.

Abstract: A battery charging and discharging device, includes a power conversion unit configured to perform electrical conversion; a connecting end for the energy storage battery pack configured to connect an energy storage battery pack; a connecting end for charging and discharging configured to connect a charging power supply or a device to be charged or a load. A first charging switch and a second charging switch are arranged between the connecting end for charging and discharging and the input of the power conversion unit, and between the output of the power conversion unit and the connecting end for the energy storage battery pack respectively. A first discharging switch and a second discharging switch are arranged between the connecting end for the energy storage battery pack and the input of the power conversion unit, and between the output of the power conversion unit and the connecting end for charging and discharging respectively.