Abstract: A battery pack includes a housing, and at least one housing structural beam and multiple electrode core strings electrically connected to one another located in the housing. The housing includes a housing body, including a top plate and a bottom plate arranged opposite to each other in a first direction. The structural beam is located between the top plate and the bottom plate, the at least one structural beam is connected to the top plate and the bottom plate, and divides the interior of the housing into multiple accommodating cavities, and at least one electrode core string is provided in at least one accommodating cavity. A mounting portion is provided on the housing, and the mounting portion is configured to be connected and fixed to an external load. The electrode core string includes multiple electrode core assemblies sequentially disposed in a second direction and connected in series.

Abstract: A control mechanism, a spindle system, and a spot welding apparatus are provided. The spot welding apparatus includes a spindle body and a hybrid drive mechanism. The spindle body is provided with a compression sleeve mechanism, which is provided with a stirring sleeve mechanism that is rotatable and capable of axial movement along an axis of the spindle body. The stirring sleeve mechanism is internally and coaxially provided with a stirring pin mechanism that is rotatable and capable of axial movement along the axis of the spindle body. The hybrid drive mechanism includes a stirring pin control mechanism drivingly connected to the stirring pin mechanism and a stirring sleeve control mechanism drivingly connected to the stirring sleeve mechanism, so as to drive the stirring pin mechanism and the stirring sleeve mechanism to perform axial movement along the axis of the spindle body.

Abstract: A protective plate includes a first composite layer having a thickness of d1 in mm, a metal substrate, and a second composite layer having a thickness of d2 in mm that are sequentially stacked, where d1>0, and d2?0. The first composite layer and the second composite layer each includes a polymer base material and a reinforcing material, the reinforcing material includes nanoparticles, the first composite layer has a tensile strength of ?1 in MPa, the second composite layer has a tensile strength of ?2 in MPa, the metal substrate has a thickness of d3 in mm and a tensile strength of ?3 in MPa, and the protection plate meets a formula: d 3 ( d 1 + d 2 ) + d 3 × ? 3 ( ? 1 + ? 1 ) + ? 3 > 0.032 .

Abstract: A battery pack protection system and a vehicle are provided. The battery pack protection system includes a battery pack and a protective plate. The battery pack includes a tray. The tray includes a frame and a bottom plate. Battery modules are arranged on the bottom plate. The protective plate is arranged parallel to the bottom plate, and the protective plate is close to a side of the bottom plate. At least one sensor is arranged on the protective plate. The protective plate is detachably connected to the frame.

Abstract: The present disclosure relates to a refill friction stir spot welding device. The refill friction stir spot welding device includes: a stir pin assembly including a stir pin; a stir sleeve assembly including a stir sleeve, the stir sleeve being sleeved outside the stir pin, the stir sleeve having a same axis as the stir pin; and an axial drive assembly and a rotary drive assembly, the axial drive assembly driving the stir pin and the stir sleeve, respectively, to move along the axis, the rotary drive assembly driving the stir pin and the stir sleeve to perform a rotational motion centered on the axis, a center axis of the axial drive assembly and a rotary axis of the rotary drive assembly are both located on the axis.

Abstract: A protective plate, including: a metal plate; a glass fiber reinforced resin layer, where the glass fiber reinforced resin layer includes a first glass fiber reinforced resin layer and a second glass fiber reinforced resin layer, the first glass fiber reinforced resin layer is located on a side of the metal plate, and the second glass fiber reinforced resin layer is located on a side of the metal plate facing away from the first glass fiber reinforced resin layer; and a carbon fiber reinforced resin layer, where the carbon fiber reinforced resin layer includes a first carbon fiber reinforced resin layer and a second carbon fiber reinforced resin layer, the first carbon fiber reinforced resin layer is located on a side of the first glass fiber reinforced resin layer, and the second carbon fiber reinforced resin layer is located on a side of the second glass fiber reinforced resin layer.

Abstract: A method includes receiving, by a first communication apparatus, first information, determining a first power and a second power based on the power parameter, providing a service for a first terminal device in a first cell based on the first power, and providing a service for a second terminal device in the first cell based on the second power. The first information is useable to indicate a power parameter. The first communication apparatus is configured to manage the first cell. The second power is greater than the first power.

Abstract: A battery pack assembly includes a frame, a composite cold plate and at least one battery cell. The frame includes a tray and exhaust channels communicated with the outside and arranged on two opposite sides of the tray. The composite cold plate is arranged on the tray. The composite cold plate includes a flow passage plate, and a concave rib-convex rib structure is formed on the surface of the flow passage plate. A concave rib is arranged between every two adjacent convex ribs. Cold plate flow passages are defined by concave ribs and the tray, and are communicated with the exhaust channels. The battery cell is arranged on the composite cold plate. Poles of the battery cell face the composite cold plate. A first explosion-proof valve is provided on the side of the battery cell facing the composite cold plate, and is communicated with the cold plate flow passages.

Abstract: A battery pack vehicle includes a tray, a battery core module, and a liquid cooling plate. The tray includes a tray bottom plate connected with tray side beams to form an accommodating space. The battery core module is disposed in the accommodating space and includes battery cores. Each battery core has a first explosion-proof valve. The liquid cooling plate is disposed on the tray bottom plate and between the battery core module and the tray bottom plate, and includes through holes extending through the liquid cooling plate. The battery core module is in contact with a first surface of the liquid cooling plate, and the first explosion-proof valves respectively corresponds to the through holes. The first channel disposed between a second surface of the liquid cooling plate and the tray bottom plate, and each tray side beam includes a second channel being in communication with the first channel.

Abstract: A battery pack includes a housing having a bottom surface and a top surface and a battery assembly in the housing. The battery assembly includes structural reinforcing members and cell sequences formed by connecting multiple cells. An outer surface of the cell includes a bottom surface, a top surface, first and second lateral surfaces. The bottom surface of the cell faces the bottom surface of the housing, and the top surface of the cell faces the top surface of the housing. The first lateral surface has a largest area. The multiple cells are arranged with second lateral surfaces thereof facing each other to form a cell sequence, and the structural reinforcing members are fixedly bonded with first lateral surfaces of cells in the cell sequence. The battery assembly is supported in the housing by the bottom surface of the housing.

Abstract: A battery protection bottom plate, a composite protection structure for a battery pack, and a vehicle are provided. The battery protection bottom plate includes an upper fiber-reinforced resin layer, a metal plate and a lower fiber-reinforced resin layer. The metal plate is located between the upper fiber-reinforced resin layer and the lower fiber-reinforced resin layer. The upper fiber-reinforced resin layer and the lower fiber-reinforced resin layer meet the following conditions: 0.4?d2/d1?2, and d1 is a thickness of the lower fiber-reinforced resin layer measured in mm, and d2 is a thickness of the upper fiber-reinforced resin layer measured in mm.

Abstract: A battery pack includes a housing having a bottom surface and a top surface and a battery assembly in the housing. The battery assembly includes structural reinforcing members and cell sequences formed by connecting multiple cells. An outer surface of the cell includes a bottom surface, a top surface, first and second lateral surfaces. The bottom surface of the cell faces the bottom surface of the housing, and the top surface of the cell faces the top surface of the housing. The first lateral surface has a largest area. The multiple cells are arranged with second lateral surfaces thereof facing each other to form a cell sequence, and the structural reinforcing members are fixedly bonded with first lateral surfaces of cells in the cell sequence. The battery assembly is supported in the housing by the bottom surface of the housing.

Abstract: A battery protection bottom plate includes a protective layer, a metal plate, and a fiber-reinforced resin layer. The metal plate is located between the protective layer and the fiber-reinforced resin layer, and the metal plate and the fiber-reinforced resin layer satisfies: 0 . 4 ? d 1 d 2 * e - ? 0 * ? 2 ? 0 * ? 2 + 0.5 ? 2. where d1 is a thickness of the fiber-reinforced resin layer in mm, d2 is a thickness of the metal plate in mm, ?2 is an elongation at break of the metal plate, ?2 is a tensile strength of the metal plate in MPa, ?0 is an elongation at break of the fiber-reinforced resin layer, and ?0 is a tensile strength of the fiber-reinforced resin layer in MPa.

Abstract: A battery protection bottom plate, a composite protection structure for a battery pack, and a vehicle. The battery protection bottom plate comprises an upper fiber reinforced resin layer, a metal plate, a fiber reinforced resin frame, and a lower fiber reinforced resin layer; the metal plate and the fiber reinforced resin frame are located between the upper fiber reinforced resin layer and the lower fiber reinforced resin layer; the metal plate is located inside the fiber reinforced resin frame; the top surface of the fiber reinforced resin frame is integrally connected to the upper fiber reinforced resin layer; the bottom surface of the fiber reinforced resin frame is integrally connected to the lower fiber reinforced resin layer.

Abstract: A battery protective bottom plate, a battery pack composite protective structure and a vehicle. The battery protective bottom plate comprises an upper fiber reinforced resin layer, a metal plate and a lower fiber reinforced resin layer, wherein the metal plate is located between the upper fiber reinforced resin layer and the lower fiber reinforced resin layer, and the following condition is satisfied: (I) 1 ? ? 2 * ( d 1 + d 2 + d 3 ) / d 2 ? 2 + ( ? 1 * d 1 + ? 3 * d 3 ) / ( d 1 + d 3 ) * ( ? 1 * d 1 + ? 3 * d 3 ) / ( d 1 + d 3 ) ? 2 ? 2 .

Abstract: The battery pack composite includes a battery pack and a battery protection bottom plate. The battery protection bottom plate includes a metal plate and is disposed below the battery pack. A buffer zone is disposed between the battery pack and the battery protection bottom plate, and the buffer zone and the metal plate satisfying: 0.018 ? ( d - 0.4 ) ? h ? * ? ? 0 . 0 ? 8 ? 5 , where d is a thickness in mm of the metal plate, ? is a tensile strength in MPa of the metal plate, ? is an elongation at break of the metal plate, and h is a height in mm of the buffer zone.

Abstract: The present disclosure discloses a protective plate for a battery pack, a battery pack and a vehicle. The protective plate includes a first fiber-resin composite layer, a metal layer and a buffering layer laminated in sequence.

Abstract: An edge beam for a battery tray, a battery tray, a battery pack, and a vehicle are provided. The edge beam includes an edge beam body. The edge beam body defines a cavity. The edge beam body has a partition portion. The partition portion is located in the cavity. The partition portion is connected between a top wall and a bottom wall of the cavity to partition the cavity into multiple sub-cavities. The multiple sub-cavities are arranged in sequence in a width direction of the edge beam. In a direction from an upper end to a lower end of the edge beam, the partition portion inclines away from the placement groove.

Abstract: The present disclosure discloses a battery pack and a vehicle. The battery pack includes: a battery core; a tray bottom plate, where the tray bottom plate has a pressed area, and the pressed area has an electrode core pressing area; and a side beam, having a side beam body with a supporting portion. In a first direction of the side beam, an orthographic projection of the supporting portion and an orthographic projection of the electrode core pressing area have an overlapping area. In a second direction of the side beam, the orthographic projection of the supporting portion and the orthographic projection of the electrode core pressing area have an overlapping length of M1, and M1 meets the relation formula: 9 mm?M1.

Abstract: A battery tray, a battery pack, and a vehicle are provided. The battery tray includes a tray bottom plate and a frame. The tray bottom plate includes a bottom plate body. The bottom plate body defines a placing slot configured to place a battery core. A bottom wall of the placing slot is provided with a pressed area configured to support the battery core. The bottom plate body is mounted at the frame. The frame has a support portion. The support portion is configured to support the bottom plate body. An orthographic projection of the support portion and an orthographic projection of the pressed area overlap in a height direction of the battery tray.