Abstract: Embodiments of the present application disclose a battery cell, a battery, a power consumption device, a method and an apparatus for producing a battery cell. The power consumption device is equipped with the battery, the battery has one or more battery cells, where the battery cell includes: a housing, with a cylindrical accommodating cavity; and an electrode assembly, arranged in the accommodating cavity, and a projection of the electrode assembly along a height direction of the battery cell is a polygon. Even if the electrode assembly in the battery cell expands after charging and discharging, there is still a remaining space between the electrode assembly and an inner wall of the housing, thereby preventing an outer circumferential surface of the electrode assembly from being pressed by the housing, and the remaining space can allow the electrode assembly to expand to avoid a problem of performance degradation of the battery cell.

Abstract: An embodiment of the present application provides an electrode assembly, a battery cell, a battery, and an electrode assembly manufacturing method and device, which belong to the technical field of batteries. The electrode assembly includes a positive electrode plate and a negative electrode plate, the positive electrode plate and the negative electrode plate being wound in a winding direction and forming a winding structure. The positive electrode plate comprises a plurality of first active substance layer regions and at least one first inactive substance layer region; and in an axial direction of the winding structure, the first inactive substance layer region is located between two adjacent first active substance layer regions, wherein, the first inactive substance layer region is provided with a first guide flow through hole, and the first guide flow through hole is configured to penetrate both sides in a thickness direction of the positive electrode plate.

Abstract: The present application discloses a secondary battery, a battery module, and a device using the secondary battery as a power source. The secondary battery includes: a casing; an electrode assembly disposed in the casing; a cap assembly; and a current collecting member including an adapting piece and a connecting component provided separately and connected with each other; the adapting piece connected with the electrode terminal of the cap assembly and including a guiding section; the connecting component including a current collecting section to be connected with the guiding section and a tab connecting section to be connected with the electrode assembly; and the connecting component has a rigidity less than that of the guiding section, so that deformation of the guiding section toward the electrode assembly can be reduced when a portion of the connecting component connected with the electrode assembly is bent with respect to the length direction.

Abstract: The present disclosure provides a battery pack including a mounting beam and a battery module connected to the mounting beam. The mounting beam is provided with a limiting protrusion and a limiting recess, and a limiting space is formed between the limiting protrusion and the mounting beam. The battery module is provided with a limiting sheet and an engaging assembly, at least a portion of the limiting sheet is inserted into the limiting space, and the engaging assembly is engaged with the limiting recess. In the battery pack according to the present disclosure, the cooperation between the limiting protrusion and the limiting sheet as well as the cooperation between the engaging assembly and the limiting recess can limit the battery module in directions X, Y and Z, thereby effectively fixing the battery module, simplifying the mounting process, and improving the mounting efficiency.

Abstract: Embodiments of the present application provide an electrode assembly, a battery cell, a battery, and a method and a device for manufacturing an electrode assembly, which belong to the technical field of batteries. Where, the electrode assembly includes a first electrode plate, a second electrode plate, and a support member. The first electrode plate and the second electrode plate are wound in a winding direction to form a winding structure, and the winding structure includes a bending area. At least a part of the support member is bent and arranged in the bending area, and the support member is configured to provide a support force to a part of the first electrode plate and/or the second electrode plate located at an outer side of the support member.

Abstract: The present application provides a fire-fighting apparatus, a box assembly, battery, a power consumption apparatus, and a method for preparing a battery. The fire-fighting apparatus includes: a pipe, a gas release mechanism, and a blocking structure. The pipe has an air inlet end and an air outlet end, and the air inlet end is configured to be connected to the battery, so that a combustible gas generated in the battery during thermal runaway events is capable of entering the pipe from the box via the air inlet end and being discharged from the pipe via the air outlet end; and the gas release mechanism is configured to be connected to the pipe and release a fire-fighting gas into the pipe when thermal runaway occurs in the battery; and the blocking structure is configured to block the combustible gas and the fire-fighting gas and change a flow direction.

Abstract: Embodiments of this application provide a box, a battery pack, and a device, and relate to the technical field of energy storage devices. The box includes a frame member, a fixing member, and a shielding member. The frame member is configured to form an accommodation cavity. The fixing member is configured to mount the box. The fixing member is connected to the frame member. The shielding member is configured to be connected to the frame member. The shielding member includes a hollow portion. At least a part of the fixing member is accommodated in the hollow portion. The battery pack includes the box and a battery accommodated in the accommodation cavity of the box. The device includes the battery pack, and the battery pack is configured to provide electrical energy.

Abstract: Disclosed are a battery, an electric apparatus, and a manufacturing method of the battery, belonging to the technical field of batteries. The battery includes a plurality of battery cells and a mounting base, where the plurality of battery cells are electrically connected; the mounting base is used to fix an output electrode of the battery, the output electrode is used to export electric energy of the plurality of battery cells, the mounting base includes at least one limiting surface, and the limiting surface is matched with the contour of the battery cell. Through the battery, the electric apparatus, and the manufacturing method of the battery, the occupied space of the mounting base is reduced, and the energy density of the battery is increased.

Abstract: The embodiments of the present application provide a current modulation module, a parameter determination module, a battery heating system, as well as a control method and a control device thereof, and relate to the field of battery. The control method includes determining a state of charge (SOC), of the battery, modulating a first current flowing into windings of a motor into an alternating current when the SOC is greater than a first SOC threshold, so as to use heat generated by the alternating current in a first target module to heat the battery, and modulating a second current flowing into the windings of the motor into a direct current when the SOC is less than or equal to the first SOC threshold, so as to use heat generated by the direct current in a second target module to heat the battery.

Abstract: A box body, a battery, an electric apparatus and a manufacturing method of the battery, belonging to the field of energy storage devices. The box body includes a cooling device and a plurality of walls, where the plurality of walls enclose an accommodating space for accommodating a battery cell, an interior of at least one wall is provided with a first flow channel, and the first flow channel is used for discharging emissions generated by thermal runaway of the battery cell out of the box body. The cooling device is arranged in the first flow channel and used for cooling the emissions flowing through the cooling device. The cooling effect of the cooling device becomes better, the possibility of firing and burning of the emissions is reduced, and the safety of the battery is improved.

Abstract: Disclosed is a battery cell, a battery, an electric apparatus, and a manufacturing method of the battery, belonging to the technical field of batteries. The battery includes an electrode assembly, an electrode terminal and a current collector, the current collector is configured to connect the electrode assembly and the electrode terminal; where the current collector and the electrode terminal are connected through a welding portion; and the welding portion is exposed at an external peripheral surface of the current collector and/or an external peripheral surface of the electrode terminal. The battery cell, the battery, the electric apparatus, and the manufacturing method of the battery are capable of ensuring the safety of the battery.

Abstract: The present application provides an equipotential apparatus, an equipotential structure, a battery and an electric device. The equipotential apparatus includes an electrically-conductive member and an elastic support. The electrically-conductive member is at least partially arranged on a surface of the elastic support, and the elastic support is configured to provide an elastic support force for the electrically-conductive member to achieve an equipotential connection between the first electric conductor and the second electric conductor. After being elastically deformed, the elastic support can provide an elastic support force for the electrically-conductive member. Under the effect of the elastic support force, the electrically-conductive member can be made to be squeezed to the first electric conductor and the second electric conductor, such that the electrically-conductive member is in close contact with the first electric conductor and the second electric conductor.

Abstract: The embodiments of the present application disclose a method, apparatus and medium for estimating a battery remaining life and relates to the field of battery power. The method includes: acquiring a material aging parameter of a battery representing an aging degree of a material of the battery; and determining, based on a preset corresponding relationship between the material aging parameter and the battery remaining life, the battery remaining life corresponding to the material aging parameter.

Abstract: The present application relates a connecting assembly, a battery module, an apparatus, and a method for manufacturing a connecting assembly. The connecting assembly is for a battery module. The battery module includes two or more secondary batteries, and the connecting assembly includes: a connecting piece configured to be electrically connected with the secondary batteries, and the connecting pieces includes a connecting portion; an insulating plate having an integrally modeled structure, the connecting portion and the insulating plate are connected in a non-detachable manner to form an integral structure, and the insulating plate is configured to restrict movement of the connecting piece. The connecting assembly provided in the present application can ensure reliable and stable connection between the connecting piece and the insulating plate, and improve the safety for using the connecting assembly.

Abstract: A method and an apparatus for controlling a permanent magnet motor, a power system and an electric vehicle. A power frequency of the permanent magnet motor is set by obtaining system parameters such as a resonance bandwidth of the permanent magnet motor and a natural frequency of a stator of the permanent magnet motor, and the permanent magnet motor is supplied power by using alternating current at the power frequency when a power battery meets a self-heating condition. Noises generated by the motor is reduced during a self-heating process of the power battery.

Abstract: The present application discloses a secondary battery, a battery module, and a device using the secondary battery as a power source. The secondary battery includes: a casing; an electrode assembly disposed in the casing; a cap assembly; and a current collecting member including an adapting piece and a connecting component provided separately and connected with each other; the adapting piece connected with the electrode terminal of the cap assembly and including a guiding section; the connecting component including a current collecting section to be connected with the guiding section and a tab connecting section to be connected with the electrode assembly; and the connecting component has a rigidity less than that of the guiding section, so that deformation of the guiding section toward the electrode assembly can be reduced when a portion of the connecting component connected with the electrode assembly is bent with respect to the length direction.

Abstract: The present disclosure provides a buffering member and a battery module, the buffering member comprises a first member and a second member. The first member comprises a first main body and a first connecting portion, the second member comprises a second main body and a second connecting portion. The first main body and the second main body face each other, and the first connecting portion is cooperated with and fixedly connected to the second connecting portion. Because the first member and the second member are independent members, and they can be formed by separately cutting a sheet. Because the first member and the second member each are small in size and simple in structure, and they can be rapidly formed by using less material, the whole structure of the buffering member is simple and the buffering member uses less material, thereby maximally improving the utilization rate of the sheet.

Abstract: A method and an apparatus for controlling a permanent magnet motor, a power system and an electric vehicle. A power frequency of the permanent magnet motor is set by obtaining system parameters such as a resonance bandwidth of the permanent magnet motor and a natural frequency of a stator of the permanent magnet motor, and the permanent magnet motor is supplied power by using alternating current at the power frequency when a power battery meets a self-heating condition. Noises generated by the motor is reduced during a self-heating process of the power battery.

Abstract: This application provides a method and an apparatus for controlling a grid-tie inverter. The method includes: acquiring an output voltage of the grid-tie inverter and an output current value of the grid-tie inverter at a current moment; calculating N output current values of the grid-tie inverter at a next moment that is in one-to-one correspondence to N switch states of the grid-tie inverter based on the output current value at the current moment, and N is a natural number greater than or equal to 2; acquiring a first reference current based on the output voltage; acquiring a second reference current based on the output current and the first reference current; determining a first switch state; and controlling the grid-tie inverter to perform power transmission in the first switch state at the next moment.

Abstract: The present disclosure provides a device for battery formation, which comprises a negative pressure mechanism, a connecting assembly and a suction joint. The negative pressure mechanism has a receiving cavity inside. The suction joint is provided to the negative pressure mechanism and communicated with the receiving cavity. The connecting assembly is provided as plurality in number, and the plurality of the connecting assemblies are provided to the negative pressure mechanism; each connecting assembly is communicated with the receiving cavity and used for being connected to a battery.