Battery packs, car bodies and vehicles

Abstract

A battery pack, a car body and a vehicle are disclosed, the battery pack includes a cover plate, a cell and a cooling plate from top to bottom, and the cooling plate is used as the bottom plate of the battery pack to realize the sealing of the battery pack. The cells are bonded to the cover plate and the weight is supported by the cover plate, so that the cooling plate supports the cells and is not destroyed, so that the cooling plate can not only realize the thermal management for the cells, but also realize the sealing for the battery pack, and realize the integration. The cover plate of the battery pack is formed as the car body floor, which reduces the number of parts, reduces the manufacturing cost and the vehicle weight, while the ground clearance of the battery pack is increased, the arrangement space of the battery pack is increased, and the probability of damage to the battery pack is reduced.

Description

[Technical Field]

[0001] The present application relates to the technical field of vehicles, and in particular to battery packs, vehicle bodies and vehicles.

[0002] This application claims priority to a Chinese patent application bearing application number 202110902937.8 and entitled "Battery Pack, Body and Vehicle" filed with the State Intellectual Property Office of the People's Republic of China on August 6, 2021, the entire contents of which are incorporated herein by reference. [Background technology]

[0003] In related technology, a floor is typically installed on the vehicle body, and a battery mounting cross beam is installed below the floor, and the battery pack is attached to the vehicle body by the battery mounting cross beam, but since there is a gap between the floor and the battery pack, the vertical dimension of the vehicle becomes large.

[0004] A conventional battery pack includes a cover plate, a cooling plate, a cell, and a tray bottom plate, which are arranged in this order from top to bottom, and is therefore heavy and has many components. Summary of the Invention [Problem to be solved by the invention]

[0005] The present application provides a battery pack, a vehicle body, and a vehicle to solve at least one of the technical problems in the prior art. [Means for solving the problem]

[0006] The battery pack according to the first embodiment of the present application comprises: a cell, a cover plate, a frame, and a cooling plate; the cell is connected to the cover plate; the cover plate is connected to the frame, and the cell is located within the frame; The cooling plate is sealed and connected to the frame, so that a storage space for the cells is formed between the cover plate, the cooling plate, and the frame.

[0007] In one embodiment, a structural adhesive is placed between the cover plate and the cells, and the cells are adhered to the cover plate.

[0008] In one embodiment, the side of the cooling plate closest to the cells is formed as a flat surface, a thermally conductive adhesive is provided between the flat surface and the cells, and a cooling channel is formed on the side of the cooling plate away from the cells.

[0009] In one embodiment, the battery pack further includes a protective plate, which is disposed on a side of the cooling plate away from the cells and connected to the frame.

[0010] In one embodiment, the extension length of the frame in the direction from the cover plate to the cooling plate is equal to or greater than the extension length of the cells.

[0011] In one embodiment, the distance from the surface of the frame closest to the cover plate to the cooling plate is greater than or equal to the distance from the surface of the cell closest to the cover plate to the cooling plate, and the distance from the surface of the frame closest to the cooling plate to the cover plate is greater than or equal to the distance from the surface of the cell closest to the cooling plate to the cover plate.

[0012] In one embodiment, the frame includes a first frame, a second frame, a third frame, and a fourth frame connected in order, the first frame is installed opposite the third frame, the second frame is installed opposite the fourth frame, and a tab is installed on the side of the cell facing the first frame or the third frame.

[0013] In one embodiment, a side of the first frame away from the third frame extends outward to form a protrusion, and the frame further includes an assembly plate connected to the side of the protrusion away from the third frame to form a power distribution cavity between the protrusion and the assembly plate.

[0014] In one embodiment, the assembly board is removably connected to the protrusion.

[0015] In one embodiment, the frame further includes a vertical beam, which is installed within the frame and extends along a direction from the first frame to the third frame, and a wiring space is formed within the vertical beam.

[0016] In one embodiment, the extension length of the longitudinal beams in the direction from the cover plate to the cooling plate is equal to the extension length of the cells.

[0017] In one embodiment, the frame further includes a connecting cross beam, both ends of which are connected between the second frame and the fourth frame to divide the frame into a plurality of sub-frames, a plurality of the cells are installed to form a plurality of cell rows, and a plurality of the cell rows are installed correspondingly within a plurality of sub-frames.

[0018] In one embodiment, the cell row includes a plurality of the cells, and the plurality of cells are arranged along a direction from the second frame to the fourth frame.

[0019] In one embodiment, the frame further includes a vertical beam, which is installed within the frame and extends in a direction from the first frame to the third frame, a wiring space is formed within the vertical beam, and an escape groove is installed in the connecting cross beam to allow the vertical beam to pass through.

[0020] In the embodiment of the present application, the battery pack includes, from top to bottom, a cover plate, a cell, and a cooling plate. The cooling plate is used as the bottom plate of the battery pack to seal the battery pack, thereby eliminating the tray bottom plate required in the prior art, reducing the number of components, weight, and height of the battery pack. Furthermore, since the cells of the present application are connected to the cover plate and their weight is supported by the cover plate, the cooling plate supports the cells and is not destroyed. As a result, the cooling plate not only achieves thermal management for the cells, but also achieves sealing for the battery pack, thereby achieving integration.

[0021] A vehicle body according to a second embodiment of the present application includes a vehicle body frame and the battery pack, a notch is formed in the body frame, The frame is connected to the vehicle body frame, and the cover plate closes the cutout portion to form a vehicle body floor.

[0022] In one embodiment, the body frame includes a first sill beam and a second sill beam installed opposite each other along the width direction of the body, the cutout portion extends from the first sill beam to the second sill beam in the width direction of the body, and both sides of the frame are connected to the first sill beam and the second sill beam, respectively.

[0023] In one embodiment, the vehicle body further includes a seat cross beam, and the seat cross beam is connected between the first sill beam and the second sill beam in the width direction of the vehicle body and is also connected to the battery pack.

[0024] In the present application, the cover plate of the battery pack is formed as the vehicle floor, eliminating the need for an additional vehicle floor, reducing the number of parts, manufacturing costs, and vehicle weight, while increasing the ground clearance of the battery pack, providing more space for battery pack installation, and reducing the risk of battery pack damage. Furthermore, compared to conventional vehicle bodies that have a floor, the vehicle body of the present application does not require an assembly gap between the floor and the battery pack, effectively improving the space utilization rate of the vehicle.

[0025] A vehicle according to a third embodiment of the present invention includes the above vehicle body.

[0026] Additional aspects and advantages of the present application will be set forth in part in the description that follows, and in part will be obvious from the description, or may be learned by practice of the present application. [Brief explanation of the drawings]

[0027] The above and / or additional aspects and advantages of the present application will become more apparent and easier to understand by describing examples with reference to the following drawings.

[0028] [Figure 1] 1 is a schematic diagram of a vehicle body according to an embodiment of the present application; [Figure 2] FIG. 1 is an exploded view of a vehicle body according to an embodiment of the present application. [Figure 3] 1 is a cross-sectional view of a first sill beam, a second sill beam, and a battery pack of a vehicle body according to an embodiment of the present application. [Figure 4] 1 is an exploded view of a battery pack of a vehicle body according to an embodiment of the present application. [Figure 5] 1 is a schematic diagram of a frame of a battery pack according to an embodiment of the present application; [Figure 6] FIG. 2 is a schematic diagram of a first frame according to an embodiment of the present application. [Figure 7] FIG. 10 is a schematic configuration diagram of the first frame according to the embodiment of the present application, viewed from another perspective. [Figure 8] 1 is a schematic diagram of a cooling plate according to an embodiment of the present invention; [Figure 9] 1 is a schematic diagram of a cell according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0029] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following detailed description of the preferred embodiments of the present invention will be given. The preferred embodiments described with reference to the accompanying drawings are merely illustrative.

[0030] In the description of this application, the orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are based on the orientations or positional relationships shown in the drawings, and are intended merely to facilitate and simplify the description of this application. They do not indicate or suggest that the devices or parts shown must have a specific orientation and be configured and operate in a specific orientation, and therefore should not be understood as limiting this application.

[0031] In this description, "plurality" means two or more than two.

[0032] As shown in FIGS. 1 to 9, an embodiment of the present application provides a battery pack 200 and a vehicle body 1 having the battery pack 200.

[0033] The battery pack 200 includes cells 220, a cover plate 210, a frame 300, and a cooling plate 240. The cells 220 are connected to the cover plate 210, which is connected to the frame 300, the cells 220 are located within the frame 300, and the cooling plate 240 is sealed and connected to the frame 300, thereby forming an accommodation space for the cells 220 between the cover plate 210, the cooling plate 240, and the frame 300.

[0034] In the embodiment of the present application, the battery pack 200 includes, from top to bottom, a cover plate 210, cells 220, and a cooling plate 240. The cooling plate 240 serves as the bottom plate of the battery pack 200 to seal the battery pack 200, thereby eliminating the tray bottom plate required in the prior art, reducing the number of components, the weight, and the height of the battery pack 200. Furthermore, the cells 220 of the present application are connected to the cover plate 210, and their weight is supported by the cover plate 210, so the cooling plate 240 supports the cells 220 without causing damage. As a result, the cooling plate 240 not only achieves thermal management for the cells 220, but also achieves sealing for the battery pack 200, thereby achieving integration.

[0035] According to some specific embodiments of the present application, as shown in FIGS. 3 and 4, a structural adhesive is installed between the cover plate 210 and the cells 220, thereby adhering the cells 220 to the cover plate 210. This allows the cover plate 210 and the cells 220 to be more tightly connected without any gaps, and the weight of the cells 220 is supported by the cover plate 210, thereby improving space utilization.

[0036] In the present embodiment, the side of the cooling plate 240 closest to the cells 220 is formed as a flat surface, and a thermally conductive adhesive is installed between the flat surface and the cells 220. By providing a flat surface for the placement of the cells 220 and filling the gaps between the cooling plate 240 and the cells 220 with the thermally conductive adhesive, the connection between the cooling plate 240 and the cells 220 becomes tighter, and the thermal conductivity of the thermally conductive adhesive is greater than that of air, which helps with heat dissipation. The cooling plate 240 has cooling channels 241 formed on the side away from the cells 220. In one embodiment, the cooling channels 241 are protruding. In this way, the cooling plate 240 reduces the temperature of the cells 220 to prevent the cells 220 from overheating and reducing their operating efficiency, thereby ensuring the operating characteristics of the cells 220 and extending their service life.

[0037] Specifically, the cooling flow path 241 includes a branch passage 250 and a plurality of heat exchange passages 260. The branch passages 250 are installed on opposite sides of the cooling plate 240, and the plurality of heat exchange passages 260 are installed between the opposite sides of the cooling plate 240 and extend from one side to the other. At least one end of each heat exchange passage 260 communicates with the branch passage 250.

[0038] Specifically, when the battery pack 200 is attached to the vehicle body, the branch passages 250 are installed on opposite sides of the cooling plate 240 along the width direction of the vehicle body, and the multiple heat exchange passages 260 extend along the width direction of the vehicle body.

[0039] For example, the cooling plate 240 includes a main plate, harmonica-shaped tubes, and a flow dividing plate, the harmonica-shaped tubes are attached to the lower surface of the main plate, the upper surface of the main plate is formed as the surface of the cooling plate 240 close to the cells 220, and the plurality of heat exchange passages 260 are formed by the harmonica-shaped tubes or by the harmonica-shaped tubes and the main plate. The flow dividing plate is press-formed and welded (e.g., brazed) to the lower surface of the main plate and crimped to both ends of the harmonica-shaped tubes, and the flow dividing passages 250 are formed by the flow dividing plate and the main plate and communicate with the plurality of heat exchange passages 260.

[0040] The cooling medium in the cooling flow channel 241 flows in a serpentine pattern through the heat exchange passages 260. In this manner, the flow dividing passages 250 are formed by press-forming the flow dividing plate, thereby saving space. The heat exchange passages 260 are formed using harmonica-shaped tubes, thereby reducing weight and costs. In some specific embodiments of the present application, as shown in FIG. 4 , the battery pack 200 further includes a protective plate 270, which is disposed on the side of the cooling plate 240 away from the cells 220 and connected to the frame 300. In the prior art, the protective plate 270 is disposed below the tray bottom plate.

[0041] In this embodiment, a heat insulating plate 280 is installed between the protection plate 270 and the cooling plate 240 to improve the heat exchange efficiency.

[0042] The protective plate 270 may be made of high-tensile steel, and since the strength of the protective plate 270 is greater than the strength of the heat-insulating plate 280 and the strength of the cooling plate 240, the protective plate 270 can prevent the heat-insulating plate 280 and the cooling plate 240 from being damaged. The heat-insulating plate 280 may be made of a foam plate, and can reduce heat exchange between the cooling plate 240 and the external environment and improve the efficiency of cooling the cells 220 by the cooling plate 240.

[0043] In some specific embodiments of the present application, as shown in FIGS. 5 to 7, the extension length of the frame 300 in the direction from the cover plate 210 to the cooling plate 240 is equal to or greater than the extension length of the cells 220.

[0044] Specifically, the distance from the surface of the frame 300 on the side closest to the cover plate 210 to the cooling plate 240 is equal to or greater than the distance from the surface of the cell 220 on the side closest to the cover plate 210 to the cooling plate 240, and the distance from the surface of the frame 300 on the side closest to the cooling plate 240 to the cover plate 210 is equal to or greater than the distance from the surface of the cell on the side closest to the cooling plate 240 to the cover plate 210. In other words, the upper surface of the frame 300 is not lower than the upper surfaces of the cells 220, and the lower surface of the frame 300 is not higher than the lower surfaces of the cells 220.

[0045] In this way, when viewed horizontally, the entire cell 220 is shielded by the frame 300 and is completely located within the frame 300, which more completely protects the outer surface of the cell 220 by the frame 300 and prevents interference between the outer surface of the cell 220 and external objects. Meanwhile, when the outer surface of the battery pack 200 is hit, the force on the frame 300 can be transmitted more evenly to the cell 220, resulting in uniform stress across the entire cell 220 and reducing the probability of the cell 220 breaking.

[0046] In the embodiment of the present application, the frame 300 includes a first frame 330, a second frame 310, a third frame 340, and a fourth frame 320, the first frame 330 being positioned opposite the third frame 340, the second frame 310 being positioned opposite the fourth frame 320, and a tab being positioned on the side of the cell 220 facing the first frame 330 or the third frame 340, i.e., the cell extends along the direction from the first frame 330 to the third frame 340.

[0047] In the present embodiment, the side of the first frame 330 remote from the third frame 340 extends outward to form a protrusion 333, and the frame 300 further includes an assembly plate 332 connected to the side of the protrusion 333 remote from the third frame 340 to form a power distribution cavity 334 between the protrusion 333 and the assembly plate 332. A power distribution device is installed in the power distribution cavity 334.

[0048] In other words, the first frame 330 integrates two functions: protecting the cells 220 and accommodating the power distribution device. The extension of the frame 300 itself in the height direction of the cells 220 accommodates the power distribution device. This eliminates the need for additional distribution device accommodation structures in the direction from the first frame 330 to the third frame 340, thereby improving space utilization. The assembly plate 332 and the protrusion 333 are removably connected by screw fasteners (bolts or screws) or rivets. An inspection sealing ring may be installed between the assembly plate 332 and the protrusion 333 to seal the gap between them and facilitate inspection and replacement of the power distribution device. The protrusion 333 is further formed with a reinforcing rib to improve the structural strength of the protrusion 333.

[0049] In one embodiment, the battery pack 200 further includes a longitudinal beam and a conductive member. The longitudinal beam is located within the frame 300 and extends along a direction from the first frame 330 to the third frame 340. A wiring space is formed within the longitudinal beam, allowing the conductive member to be easily connected to a power distribution device within the power distribution cavity 334.

[0050] In this embodiment, the extension length of the longitudinal beams in the direction from the cover plate 210 to the cooling plate 240 is equal to the extension length of the cells 220, and the extension of the longitudinal beams in the height direction of the cells is used to form wiring space, thereby improving space utilization. By achieving electrical conduction between the power distribution device and the vehicle's rear drive motor, the battery pack 200 can be applied to four-wheel drive vehicles without destroying the structural integrity of the battery pack 200 in the vertical and horizontal directions. Thus, the battery pack 200 combines reliable electrical connection with its own structural strength. In this embodiment, the height direction of the cells 220 coincides with the direction from the cover plate 210 to the cooling plate 240.

[0051] In some embodiments of the present application, as shown in FIG. 3 , a plurality of cells 220 are installed, and the plurality of cells form a plurality of cell rows, and the frame 300 further includes a connecting cross beam 400, which is connected between the second frame 310 and the fourth frame 320 to divide the frame 300 into a plurality of sub-frames, and the plurality of cell rows are installed in a one-to-one correspondence within the plurality of sub-frames.

[0052] As can be seen, the cell row includes a plurality of cells 220, and the plurality of cells 220 are arranged along the direction from the second frame 310 to the fourth frame 320. The connecting horizontal beam 400 is provided with a relief groove that allows the vertical beam to pass through.

[0053] In some embodiments, multiple connecting beams 400 may be installed, and the multiple connecting beams 400 are arranged along the direction from the first frame 330 to the third frame 340. Because tabs 221 connected to other electrical components are installed at the ends of the cells 220, a gap exists between two adjacent cell rows, and the connecting beams 400 are supported between the second frame 310 and the fourth frame 320 and are arranged between the two adjacent cell rows.

[0054] The vehicle body of the embodiment of the present application includes a vehicle body frame 100 and the above-mentioned battery pack 200, in which a cutout portion 101 is formed in the vehicle body frame 100, a frame 300 of the battery pack 200 is connected to the vehicle body frame 100, and a cover plate 210 closes the cutout portion 101 to form a vehicle body floor.

[0055] In the present application, the cover plate 210 of the battery pack 200 is formed as the vehicle body floor, eliminating the need to install an additional vehicle body floor, reducing the number of parts, manufacturing costs, and vehicle weight, while increasing the ground clearance of the battery pack 200, increasing the space for arranging the battery pack 200, and reducing the probability of damage to the battery pack 200. Furthermore, compared to conventional vehicle bodies that have a floor, the vehicle body 1 of the present application does not require an assembly gap between the floor and the battery pack 200, effectively improving the space utilization rate of the vehicle.

[0056] 4, the vehicle body further includes a sealing member 500, which is connected between the battery pack 200 and the vehicle frame 100, thereby sealing the cover plate 210 of the battery pack 200 and the vehicle frame 100. When the battery pack 200 of the present application is attached to the vehicle body, the direction from the first frame 330 to the third frame 340 coincides with the length direction of the vehicle body, the direction from the second frame 310 to the fourth frame 320 coincides with the width direction of the vehicle body, and the direction from the cover plate 210 to the cooling plate 240 coincides with the height direction of the vehicle body.

[0057] As shown in FIG. 3, the vehicle frame 100 includes a first sill beam 110 and a second sill beam 120 arranged opposite each other along the width direction of the vehicle body, and the cutout portion 101 extends from the first sill beam 110 to the second sill beam 120 in the width direction of the vehicle body, and both sides of the frame 300 of the battery pack 200 are connected to the first sill beam 110 and the second sill beam 120, respectively.

[0058] In this way, the connecting cross beam 400 installed between the second frame 310 and the fourth frame 320 can withstand some of the collision force when the first sill beam 110 and the second sill beam 120 of the vehicle are hit, thereby improving the structural strength of the battery pack 200. Furthermore, after being connected to the seat cross beam 410, the connecting cross beam 400 can improve the modal rigidity and torsional rigidity of the battery pack 200, thereby improving the structural strength of the battery pack 200.

[0059] In addition, in the embodiment shown in Figure 3, the vehicle body 1 further includes a seat cross beam 410, which is connected between the first sill beam 110 and the second sill beam 120 in the width direction of the vehicle body, and which penetrates the cover plate 210 of the battery pack 200 and is connected to the connecting cross beam 400 of the battery pack 200.

[0060] Since the cells 220 extend along the length of the vehicle body and multiple cells 220 are arranged along the width of the vehicle body, when the first sill beam 110 and the second sill beam 120 are hit, the cells 220 can perform the functions of force transmission and support, making the stress in the cells 220 more uniform, improving the strength of the cells 220 to resist side collisions of the vehicle, and effectively preventing short circuits due to bending of the cells 220.

[0061] When the battery pack 200 is applied to a vehicle, multiple cells 220 may be installed in the length direction of the body frame 100 according to the length dimension of the body frame 100 to adapt to different vehicle models. The total power capacity of the battery pack 200 can be changed by increasing or decreasing the number of cells 220 in the width direction of the body frame 100. In order to arrange as many cells 220 as possible in the width direction of the body frame 100, the multiple cells 220 can be arranged closely together. In this way, when the battery pack 200 is subjected to a force in the width direction of the body frame 100, it is ensured that each cell 220 participates in force transmission, thereby increasing the structural strength and improving the space utilization rate within the battery pack 200. By arranging the multiple cells 220 along the width direction of the body frame 100, when an obstacle on the road collides with the bottom of the vehicle while the vehicle is running, the number of damages to the cells 220 can be significantly reduced, and the space utilization rate of the battery pack 200 can be improved. Since the overall volume of the cells 220 increases, the proportion of the overall volume of the cells 220 that accounts for the volume of the battery pack 200 increases, that is, the energy density of the battery pack 200 can be improved.

[0062] In one embodiment, a heat insulating plate 230 is installed between the cells 220 and the frame 300. By preventing direct contact between the frame 300 and the cells 220 in this manner, the cells 220 closest to the frame 300 are prevented from exchanging heat with the outside through the frame 300, ensuring that the temperatures of the multiple cells 220 are similar, thereby optimizing the overall operating characteristics of the multiple cells 220. Furthermore, the heat insulating plate 230 not only provides heat retention, but also has an insulating effect and can absorb assembly gaps between the cells 220 and the frame 300.

[0063] Specifically, an energy absorption space 130 is formed in both the first sill beam 110 and the second sill beam 120, and a sill reinforcement beam 140 is installed in both the energy absorption space 130 of the first sill beam 110 and the energy absorption space 130 of the second sill beam 120 to protect the battery pack 200 in the width direction of the vehicle body.

[0064] When the vehicle is hit by a side collision, the energy absorption space 130 absorbs energy and can reduce the collision force transmitted from the first sill beam 110 and the second sill beam 120 to the battery pack 200. In addition, the installation of the sill reinforcement beam 140 improves the structural strength of the first sill beam 110 and the second sill beam 120, allowing the first sill beam 110 and the second sill beam 120 to withstand a greater collision force. The sill reinforcement beam 140 also absorbs energy and transmits force, not only reducing the force transmitted to the battery pack 200 but also guiding the transmission of the collision force, thereby effectively protecting the battery pack 200 and improving safety in the event of a side collision accident.

[0065] For example, the sill reinforcement beam 140 may be manufactured from metal aluminum or an aluminum alloy, and in this way, the sill reinforcement beam 140 is not only light in mass but also easily manufactured into a more complex structure, and the flatness of the sill reinforcement beam 140 is higher. In this way, the vehicle body 1 according to the embodiment of the present application has advantages such as high space utilization rate, high structural strength, and high safety.

[0066] In some specific embodiments of the present application, as shown in Figures 1-3, at least one energy absorbing cavity 141 is formed within each sill reinforcement beam 140, and the energy absorbing cavity 141 extends along the length of the sill reinforcement beam 140.

[0067] In this way, the sill reinforcement beam 140 absorbs collision energy through the energy absorption cavities 141, improving the resistance of the first sill beam 110 and the second sill beam 120 to collision forces, thereby effectively preventing the collision force from being transmitted to the battery pack 200. Each sill reinforcement beam 140 has multiple energy absorption cavities 141 arranged in both the up-down and left-right directions within its cross section, thereby increasing the collision energy absorption capacity of the sill reinforcement beam 140 and improving the resistance of the first sill beam 110 and the second sill beam 120 to collision forces. Furthermore, the sill reinforcement beam 140 can absorb collision forces multiple times in both the up-down and left-right directions, and the energy absorption cavities 141 occupy a larger proportion of the cross section of the sill reinforcement beam 140. This prevents the collision force from not passing through the energy absorption cavities 141 when a localized collision occurs on the sill reinforcement beam 140, thereby more effectively preventing the collision force from being transmitted to the battery pack 200.

[0068] Specifically, the sill reinforcement beam 140 is connected to at least the inner wall and the top wall of the energy absorption space 130 in which it is located, i.e., at least one of the left and right side surfaces and the upper surface of the sill reinforcement beam 140 contacts the inner wall of the energy absorption space 130. In this way, the sill reinforcement beam 140 is fixed in both the left-right and up-down directions, and the positional stability of the sill reinforcement beam 140 is increased.

[0069] 3, the upper surface of the sill reinforcement beam 140 is higher than the upper surface of the battery pack 200, and the lower surface of the sill reinforcement beam 140 is lower than the upper surface of the battery pack 200. That is, when viewed from the horizontal direction, the sill reinforcement beam 140 and the battery pack 200 partially overlap each other.

[0070] In this way, when the left or right side of the vehicle is hit by a collision, the sill reinforcement beam 140 and the battery pack 200 can always transmit force to each other, ensuring that the sill reinforcement beam 140 protects the battery pack 200, and the battery pack 200 can transmit force between the sill reinforcement beam 140 of the first sill beam 110 and the sill reinforcement beam 140 of the second sill beam 120.

[0071] In some specific embodiments of the present application, as shown in FIG. 3 , each of the first sill beam 110 and the second sill beam 120 includes a side sill inner panel 150 and a side sill outer panel 160. The side sill outer panel 160 is connected to the side of the side sill inner panel 150 facing away from the battery pack 200 and defines the energy absorption space 130 together with the side sill inner panel 150. For example, the side sill inner panel 150 and the side sill outer panel 160 may be welded together. The sill reinforcement beam 140 is attached to at least one of the side sill inner panel 150 and the side sill outer panel 160. In this manner, the sill reinforcement beam 140 can be prevented from swinging within the energy absorption space 130 during vehicle travel, thereby preventing noise and vibration. This increases the positional stability of the sill reinforcement beam 140, thereby improving the noise, vibration, harshness (NVH) characteristics of the vehicle.

[0072] The frame 300 is attached to the first sill beam 110 and the second sill beam 120, and at least one crush cavity 301 is formed within the frame 300. The crush cavity 301 is located between the cell 220 and the first sill beam 110, and between the cell 220 and the second sill beam 120, so that it can effectively absorb the forces transmitted from the first sill beam 110 and the second sill beam 120 to the cell 220. By effectively damping the forces transmitted by the first sill beam 110 and the second sill beam 120, the stress on the cell 220 is reduced, making the cell 220 less susceptible to damage and providing greater safety.

[0073] In some specific embodiments of the present application, as shown in Figures 3 and 5, the second frame 310 is located between the first sill beam 110 and the cell 220, and the second frame 310 is provided with a first boss 311, a first upper force transmission rib 312, and a first lower force transmission rib 313. The first boss 311 is attached to the lower surface of the first sill beam 110. From the second frame 310 to the fourth frame 320, the first upper force transmission rib 312 extends into the crush cavity 301 of the second frame 310 with a downward inclination. The first lower force transmission rib 313 is located in the crush cavity 301 of the second frame 310 and corresponds to the position of the first boss 311 in the height direction. From the second frame 310 to the fourth frame 320, the first lower force transmission rib 313 is inclined upward from left to right. For example, the first boss 311 is screwed to the first sill beam 110 .

[0074] The fourth frame 320 is located between the second sill beam 120 and the cell 220, and has a second boss 321, a second upper force transmission rib 322, and a second lower force transmission rib 323 installed on the fourth frame 320. The second boss 321 is attached to the lower surface of the second sill beam 120. In the direction from the fourth frame 320 to the second frame 310, the second upper force transmission rib 322 extends into the crush cavity 301 of the fourth frame 320, sloping downward from right to left. The second lower force transmission rib 323 is installed in the crush cavity 301 of the fourth frame 320 and corresponds to the position of the second boss 321 in the height direction. In the direction from the fourth frame 320 to the second frame 310, the second lower force transmission rib 323 is sloping upward.

[0075] When the first sill beam 110 transmits force to the battery pack 200, a first force transmission path in which the first sill beam 110 transmits force to the first upper force transmission rib 312 of the frame 300, the first upper force transmission rib 312 transmits the force to the crush cavity 301, and then the force attenuated by the crush cavity 301 is transmitted to the cell 220; There is a second force transmission path in which the first sill beam 110 transmits force to the first boss 311 on the lower side, the first boss 311 transmits the force to the first lower force transmission rib 313, the first lower force transmission rib 313 transmits the force to the crush cavity 301, and then the force attenuated by the crush cavity 301 is transmitted to the cell 220.

[0076] The force transmission path through which the force is transmitted from the second sill beam 120 to the battery pack 200 is similar to the force transmission path through which the force is transmitted from the first sill beam 110 to the battery pack 200, and therefore, a description thereof will be omitted in this specification.

[0077] In this way, the first sill beam 110 transmits force to the upper and lower parts of the frame 300 via the first upper force transmission rib 312 and the first lower force transmission rib 313, and the second sill beam 120 transmits force to the upper and lower parts of the frame 300 via the second upper force transmission rib 322 and the second lower force transmission rib 323. This further disperses the force transmitted to the cells 220, preventing damage to the battery pack 200 due to excessive local stress and improving the safety of the vehicle body. The cells 220 of the present application are located in the side collision path, and all cells extending along the length of the vehicle body participate in force transmission. Because their force transmission area is large, the pressure received in the force transmission direction of the cells 220 is reduced, allowing the cells to participate in force transmission and reducing the possibility of damage to the cells 220. In addition, when the first sill beam 110 is hit, the battery pack 200 can perform some of the force transmission and energy absorption functions, and since there is no need to maintain a gap between the battery pack 200 and the first sill beam 110, the volume of the battery pack 200 can be larger, which effectively improves the power capacity of the battery pack 200.

[0078] Hereinafter, a vehicle according to an embodiment of the present application will be described with reference to the drawings, and the vehicle includes a vehicle body 1 according to the above embodiment of the present application.

[0079] The vehicle according to the embodiment of the present application has advantages such as high space utilization rate, high structural strength, and high safety by utilizing the vehicle body 1 according to the above embodiment of the present application.

[0080] Other configurations and operations of the vehicle body 1 according to the embodiment of the present application and the vehicle having the same are known to those skilled in the art and will not be described in detail here.

[0081] In the description herein, any reference to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "particular examples," or "some examples" means that the specific feature, structure, material, or characteristic described in combination with the embodiment or example is included in at least one embodiment or example of the present application. In the description herein, any reference to the above-mentioned terms is not necessarily limited to the same embodiment or example.

[0082] Although embodiments of the present application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present application, and that the scope of the present application is limited by the claims and their equivalents. [Explanation of symbols]

[0083] 1. Body 100 body frame 101 Notch 110 First Silver Beam 120 Second Silver Beam 130 Energy Absorption Space 140 Sill reinforcement beam 141 Energy Absorption Cavity 150 Side sill inner panel 160 Side sill outer panel 200 battery packs 210 Lid plate 220 cells 221 tabs 230 Insulation board 240 Cooling plate 241 Cooling Channel 250 Diversion passage 260 Heat exchange passage 270 Protection plate 280 Heat insulation board 300 frames 301 Crush Cavity 310 2nd Frame 311 First Boss 312 First upper force transmission rib 313 First lower force transmission rib 320 4th Frame 321 Second Boss 322 Second upper force transmission rib 323 Second Lower Force Transmission Rib 330 1st Frame 332 Assembly board 333 Protrusion 334 Power Distribution Cavity 340 3rd Frame 400 Connecting beam 410 Sheet cross beam 500 Sealing material

Claims

1. The apparatus includes a cell (220), a cover plate (210), a frame (300), and a cooling plate (240), the cell is connected to the cover plate, and the weight of the cell is supported by the cover plate; the cover plate is connected to the frame, and the cell is located within the frame; The cooling plate is sealed and connected to the frame, thereby forming a storage space for the cells between the cover plate, the cooling plate, and the frame.

2. 2. The battery pack according to claim 1, wherein a structural adhesive is provided between the cover plate and the cells, and the cells are adhered to the cover plate.

3. 2. The battery pack according to claim 1, wherein a side of the cooling plate close to the cells is formed as a flat surface, a thermally conductive adhesive is provided between the flat surface and the cells, and a cooling channel (241) is formed on a side of the cooling plate away from the cells.

4. 2. The battery pack of claim 1, further comprising a protective plate (270), the protective plate being disposed on a side of the cooling plate away from the cells and connected to the frame.

5. 2. The battery pack according to claim 1, wherein the extension length of the frame in the direction from the cover plate to the cooling plate is equal to or greater than the extension length of the cells.

6. 2. The battery pack according to claim 1, wherein the distance from the surface of the frame closest to the cover plate to the cooling plate is equal to or greater than the distance from the surface of the cell closest to the cover plate to the cooling plate, and the distance from the surface of the frame closest to the cooling plate to the cover plate is equal to or greater than the distance from the surface of the cell closest to the cooling plate to the cover plate.

7. 2. The battery pack according to claim 1, wherein the frame includes a first frame (330), a second frame (310), a third frame (340), and a fourth frame (320) connected in order, the first frame being disposed opposite the third frame, the second frame being disposed opposite the fourth frame, and a tab (221) being disposed on the side of the cell facing the first frame or the third frame.

8. 8. The battery pack of claim 7, wherein a side of the first frame remote from the third frame extends outward to form a protrusion (333), and the frame further includes an assembly plate (332) connected to a side of the protrusion remote from the third frame to form a power distribution cavity (334) between the protrusion and the assembly plate.

9. 9. The battery pack according to claim 8, wherein the assembly plate is removably connected to the protrusion.

10. 8. The battery pack according to claim 7, wherein the frame further includes a vertical beam, the vertical beam being installed within the frame and extending along a direction from the first frame to the third frame, and a wiring space being formed within the vertical beam.

11. 11. The battery pack according to claim 10, wherein an extension length of the longitudinal beam in a direction from the cover plate to the cooling plate is equal to an extension length of the cell.

12. 8. The battery pack according to claim 7, wherein the frame further includes a connecting cross beam (400), both ends of which are connected between the second frame and the fourth frame to divide the frame into a plurality of subframes, a plurality of the cells are installed to form a plurality of cell rows, and a plurality of the cell rows are installed in a corresponding one of the subframes.

13. The battery pack according to claim 12 , wherein the cell row includes a plurality of the cells, and the plurality of the cells are arranged along a direction from the second frame to the fourth frame.

14. 13. The battery pack of claim 12, wherein the frame further includes a vertical beam, the vertical beam is installed within the frame and extends along a direction from the first frame to the third frame, a wiring space is formed within the vertical beam, and a clearance groove is provided in the connecting cross beam to allow the vertical beam to pass through.

15. A vehicle body including a vehicle body frame and the battery pack according to any one of claims 1 to 14, The vehicle body frame has a notch (101) formed therein, The frame is connected to the vehicle body frame, and the cover plate closes the cutout portion to form a vehicle body floor.

16. 16. The vehicle body of claim 15, wherein the vehicle body frame (100) includes a first sill beam (110) and a second sill beam (120) arranged opposite each other along the width direction of the vehicle body, the cutout portion extends from the first sill beam to the second sill beam in the width direction of the vehicle body, and both sides of the frame are connected to the first sill beam and the second sill beam, respectively.

17. 17. The vehicle body according to claim 16, further comprising a seat cross beam (410), wherein the seat cross beam is connected between the first sill beam and the second sill beam in the width direction of the vehicle body and is also connected to the battery pack.

18. A vehicle comprising the body of claim 15.

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