Abstract: The disclosure relates to the battery field and a PEO film, a preparation method thereof, and a solid-state battery are provided. A molecular structure of the PEO film includes a structural unit B, and the structural unit B includes —CH?CH—O—.

Abstract: A preparation method of a cathode slurry and a battery are provided. The preparation method includes: S1, mixing materials containing a plasticizer and an additive to form a premixed slurry A; and S2, mixing a styrene-butadiene rubber emulsion with the premixed slurry A. The plasticizer includes a first functional group including at least one of a hydroxyl group, a carbonate group, and a ketone group. The additive includes a second functional group including at least one of a carboxyl group, a nitrile group, and an amide group.

Abstract: A battery and a battery manufacturing method are provided. The battery includes a main body portion, a cover plate assembly, a tab portion, and a connecting piece. The cover plate assembly is located on a top surface of the main body portion and includes a pole. The tab portion extends out from a side surface of the main body portion and is bent toward a first large surface of two opposite large surfaces of the main body portion. The connecting piece is bent into a first section, located on the top surface and connected with the pole, and a second section, parallel or almost parallel to the side surface and welded to a surface of one side of the tab portion facing or facing away from the main body portion. A surface where the connecting piece is connected with the second section is disposed opposite to the main body portion.

Abstract: The disclosure relates a battery technology field, and in particular, relates to a battery pack. The battery pack includes a battery array and a liquid cooling tube. The battery array includes at least two batteries, and the batteries are arranged in a first direction. The liquid cooling tube is disposed on a surface of the battery array and is configured to dissipate heat for the batteries. The liquid cooling tube includes cooling portions, and the cooling portions are portions of an orthographic projection of the liquid cooling tube on the battery array. Orthographic projections of the cooling portions on the battery array are cooling regions. In the battery array, at least one of the batteries is located outside a range of the cooling portions.

Abstract: A power supply system and a control method and control device thereof are provided. The power supply system includes a first power supply device, a heat-dissipation unit, a second power supply device, and a control device. The control device is configured to confirm whether each battery pack in the first power supply device experiences thermal runaway, and control the first power supply device to supply power to the heat-dissipation unit when no battery pack in the first power supply device experiences thermal runaway, so that the heat-dissipation unit dissipates heat from the first power supply device; and control a battery pack not experiencing thermal runaway in the first power supply device and/or the second power supply device to supply power to the heat-dissipation unit when a battery pack in the first power supply device experiences thermal runaway, so that the heat-dissipation unit dissipates heat from the first power supply device.

Abstract: A tab, a preparation method thereof, and a battery including the tab are disclosed. The tab is a copper foil material, a surface of the copper foil material having a large compressive stress is an S surface, a surface having a small compressive stress is an M surface, and only the M surface is provided with an indentation or a reinforcing rib. In the preparation method of the tab of the disclosure, the S surface/M surface of the copper foil material are identified, and it is ensured that a feed direction is oriented so that the M surface faces outward (or inward), and winding/unwinding directions of each process and a mounting direction of an embossing device are reasonably fixed, so as to ensure that a tab emboss pattern of a product is pressed on the M surface of the copper foil material rather than the S surface or both surfaces.

Abstract: A separator including a porous substrate layer, an intermediate layer, and a ceramic coating layer is provided. The ceramic coating layer is disposed on a side of the intermediate layer away from the porous substrate layer. The intermediate layer includes a metal oxide powder. The particle diameter of the metal oxide powder is less than the pore diameter of the porous substrate layer, and at least a portion of the metal oxide powder is embedded in the porous substrate layer. A method of preparing the separator and a lithium-ion battery including the separator are also provided.

Abstract: The disclosure discloses a battery module. The electrical connection between a first electrode of a first battery and a second electrode of a second battery can be realized by setting a jumper electrode connector, thereby facilitating realization of connection relationship of multiple batteries. Moreover, an insulating structure is provided between the jumper electrode connector and the battery. Also, the jumper electrode connector includes a first through hole, the orthographic projection of the first through hole and the orthographic projection of the explosion-proof valve at least partially overlap each other, and the orthographic projection of the first through hole overlaps the orthographic projection of the insulating structure.

Abstract: The disclosure discloses a method and an apparatus for determining a state of power (SOP) of a battery system. With the method and apparatus, battery health state indexes determined according to the internal resistance and the current power of the battery system may serve as a calibration index, and the initial power parameters may be calibrated by using the calibration index. The internal resistance of the battery reflects the aging property of the battery system. Therefore, in the disclosure, the initial power parameters are calibrated according to the aging property of the battery system.

Abstract: A cathode material, containing a crystal with a superlattice structure, is provided. A chemical formula of the crystal is xLi2MO3.(1-x)LiNiaCobMn(1-a-b)O2, where 0<x?0.1, 0.8?a<1, b?0.1, and M is selected from one or more of Mn, Co, and Ni. A preparation method of the cathode material and a battery or a capacitor containing the cathode material are also provided.

Abstract: A welding method of a battery cover plate includes: performing a first welding and performing a second welding. The first welding starts from an edge of one side of the cover plate, continuously welds a portion of a connecting seam between a shell and the cover plate, and ends at an edge of an opposite side. The second welding starts from an ending position of the first welding, continuously welds a remaining portion of the connecting seam, and ends at an initial position of the first welding, or, the second welding starts from the initial position of the first welding, continuously welds the remaining portion of the connecting seam, and ends at the ending position of the first welding.

Abstract: A welding method of a battery cover plate includes performing at least two times of continuous welding along a connecting zone between a cover plate and a shell, and adjusting laser welding power, welding speeds, and defocusing amounts. Welding power of a first continuous welding is less than welding power of a second continuous welding. An amount of deformation of the shell is less than or equal to 0.6 mm after the first continuous welding, and the amount of deformation of the shell is less than or equal to 1.0 mm after the second continuous welding.

Abstract: A battery apparatus includes at least two battery units. Each of the battery units includes at least two batteries. A heat insulating pad is disposed between the adjacent two battery units, and at least a pair of the adjacent two batteries belonging to a same battery unit contact each other with largest surfaces of the batteries.

Abstract: A preparation method of a cathode slurry and a battery are provided. The preparation method includes: S1, mixing materials containing a plasticizer and an additive to form a premixed slurry A; and S2, mixing a styrene-butadiene rubber emulsion with the premixed slurry A. The plasticizer includes a first functional group including at least one of a hydroxyl group, a carbonate group, and a ketone group. The additive includes a second functional group including at least one of a carboxyl group, a nitrile group, and an amide group.

Abstract: A battery apparatus includes batteries arranged in a first direction; an end plate disposed at an end of the battery apparatus and having adjacent third and fourth surfaces; a protective support disposed on the end plate and having adjacent first and second surfaces. The first and third surfaces are disposed opposite to each other, and the second and fourth surfaces face the batteries; the fourth surface has an adhesive layer; the protective support has a notch at a junction of the first and second surfaces, and the notch is a first notch, and/or the end plate is provided with a notch at a junction of the third and fourth surfaces, and the notch is a second notch; a first (first notch and third surface), second (second notch and first surface), or third (first and second notches) combination forms a groove, and an opening of the groove faces the batteries.

Abstract: A power supply system and a control method and control device thereof are provided. The power supply system includes a first power supply device, a heat-dissipation unit, a second power supply device, and a control device. The control device is configured to confirm whether each battery pack in the first power supply device experiences thermal runaway, and control the first power supply device to supply power to the heat-dissipation unit when no battery pack in the first power supply device experiences thermal runaway, so that the heat-dissipation unit dissipates heat from the first power supply device; and control a battery pack not experiencing thermal runaway in the first power supply device and/or the second power supply device to supply power to the heat-dissipation unit when a battery pack in the first power supply device experiences thermal runaway, so that the heat-dissipation unit dissipates heat from the first power supply device.

Abstract: The disclosure relates a battery technology field, and in particular, relates to a battery pack. The battery pack includes a battery array and a liquid cooling tube. The battery array includes at least two batteries, and the batteries are arranged in a first direction. The liquid cooling tube is disposed on a surface of the battery array and is configured to dissipate heat for the batteries. The liquid cooling tube includes cooling portions, and the cooling portions are portions of an orthographic projection of the liquid cooling tube on the battery array. Orthographic projections of the cooling portions on the battery array are cooling regions. In the battery array, at least one of the batteries is located outside a range of the cooling portions.

Abstract: A battery pack includes a battery column and a liquid cooling tube. The battery column includes at least two batteries, and the batteries are arranged in a first direction. The liquid cooling tube is disposed on a surface of the battery column and is configured to dissipate heat for the batteries. The liquid cooling tube includes cooling portions, and the cooling portions are portions having orthographic projections on the battery column. The orthographic projections of the cooling portions on the battery column are cooling regions. The cooling portions extend in a second direction, and the second direction is not parallel to the first direction.

Abstract: A silicon-graphite composite, a preparation method thereof, and a lithium battery anode and a lithium battery containing the silicon-graphite composite are provided in an embodiment of the disclosure. The silicon-graphite composite includes graphite and a silicon source fiber. The silicon source fiber is embedded in an interlayer structure of the graphite. The silicon-graphite composite is used as an anode material of the lithium battery in an embodiment of the disclosure.

Abstract: A battery module is provided. The battery module provided by the disclosure includes a battery and a temperature collecting unit. The temperature collecting unit includes a support plate and a thermal element. The thermal element is disposed on an upper surface of the support plate. A lower surface of the support plate is attached to the battery.