Battery apparatus and electric device

Abstract

Provided in the present application are a battery apparatus and an electric device. The battery apparatus comprises a case and battery cells. The case comprises a body and a bottom protective plate. The body comprises a frame and a base plate, the base plate being connected to the frame and enclosing with the frame to form an accommodating cavity, which is used for accommodating the battery cells, and the base plate being connected to the battery cells in a thermally conductive manner. The bottom protective plate is arranged on the side of the base plate away from the accommodating cavity and is detachably connected to the body; a heat exchange channel for accommodating a heat exchange medium is formed in the bottom protective plate, and the bottom protective plate is connected to the base plate in a thermally conductive manner. The battery apparatus provided in the present application integrates the heat exchange channel in the bottom protective plate, thereby reducing the risk of heat exchange medium leakage into the battery apparatus when the heat exchange channel breaks, and the bottom protective plate being detachably connected to the body of the case improves the maintainability of the battery apparatus.

Description

Battery device and electric appliance Cross-reference to related applications

[0001] The present application claims priority to Chinese Patent Application No. 202411096774.9, filed on August 12, 2024, entitled “Battery device and electric appliance”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, in particular to a battery device and an electric appliance. BACKGROUND

[0003] At present, in the field of automobiles, electric vehicles have become the mainstream trend in the future. As the most core power supply component of the whole vehicle, the battery determines the key indicators such as the cruising range, cost, service life, etc. of the whole vehicle.

[0004] The related art arranges a water cooling plate in the box body of the battery to improve the thermal management performance of the battery, thereby maintaining good charge and discharge performance. However, this way of arranging the water cooling plate in the box body has the risk of cooling liquid leaking into the battery after the flow channel of the water cooling plate is broken, and the water cooling plate is not easy to disassemble and maintain, and often only the whole battery can be scrapped. SUMMARY

[0005] In view of the above problems, the present application provides a battery device and an electric appliance, which reduces the risk of leakage of heat exchange medium into the interior of the battery device after the heat exchange channel is broken, and improves the maintainability of the battery device.

[0006] In a first aspect, the present application provides a battery device, comprising a box body and a battery monomer, the box body comprising a main body and a bottom guard plate, the main body comprising a frame and a bottom plate, the bottom plate being connected to the frame and enclosing a receiving cavity with the frame, the receiving cavity being used for accommodating the battery monomer, and the bottom plate being in thermal conductive connection with the battery monomer; the bottom guard plate is arranged on the side of the bottom plate away from the receiving cavity and is detachably connected to the main body, a heat exchange channel for accommodating heat exchange medium is formed in the bottom guard plate, and the bottom guard plate is in thermal conductive connection with the bottom plate.

[0007] In the technical scheme of the present application, the receiving cavity is formed by the frame and the bottom plate, and the heat exchange channel is integrated in the bottom guard plate. The bottom guard plate is located on the side of the bottom plate away from the receiving cavity, which reduces the risk of leakage of heat exchange medium into the interior of the battery device after the heat exchange channel is broken. At the same time, the bottom guard plate is detachably connected to the main body of the box body. When the heat exchange channel is damaged or broken, the bottom guard plate can be disassembled, repaired or replaced, which improves the maintainability of the battery device and the bottom ball impact resistance of the battery device.

[0008] Optionally, the bottom guard plate is detachably connected to the frame. By connecting the bottom guard plate to the frame, the connection stability of the bottom guard plate can be improved by taking advantage of the high structural strength of the frame.

[0009] Optionally, the bottom guard plate comprises a first plate body and a second plate body, the first plate body and the second plate body are arranged in sequence in a direction away from the bottom plate, the first plate body and the second plate body are sealingly connected, and the heat exchange channel is formed between the first plate body and the second plate body. By sealingly connecting the first plate body and the second plate body to form the heat exchange channel, the manufacturing is convenient, and the protection of the main body can be realized by the two layers of plate bodies to improve the crashworthiness of the main body.

[0010] Optionally, the first plate body is bent towards the bottom plate to form a convex portion, the second plate body is arranged on the convex portion, and the heat exchange channel is formed by the convex portion and the second plate body. The convex portion can strengthen the first plate body and improve the structural stability.

[0011] Optionally, the second plate body is detachably connected to the frame, the second plate body is recessed to form an assembly groove in a direction away from the bottom plate, and the first plate body is accommodated in the assembly groove. By accommodating the first plate body in the accommodation groove formed by the second plate body, the connection between the first plate body and the second plate body is located in the accommodation groove, so that the connection can be protected to some extent, the risk of damage is reduced, and the stability of the sealing connection between the first plate body and the second plate body is improved.

[0012] Optionally, the first plate body is at least partially clamped between the second plate body and the frame and connected to the second plate body and the frame. The first plate body and the second plate body are connected to the frame, which can improve the connection stability of the bottom plate and the main body.

[0013] Optionally, the main body further comprises a sealing gasket arranged between the frame and the bottom plate to sealingly connect the frame and the bottom plate. While improving the sealing of the frame and the bottom plate, the connection strength of the frame and the bottom plate is also improved.

[0014] Optionally, the battery device further comprises a fastener, and the bottom guard plate and the main body are detachably connected by the fastener. The detachable connection of the bottom guard plate and the main body is realized by the fastener, which facilitates the installation and disassembly of the bottom guard plate.

[0015] Optionally, the battery device further comprises a heat-conducting pad arranged between the bottom plate and the bottom guard plate and in contact with the bottom plate and the bottom guard plate. The heat-conducting pad can improve the heat transfer efficiency between the bottom plate and the bottom guard plate, thereby accelerating the heat dissipation of the battery device. At the same time, the heat-conducting pad can improve the resistance to collisions such as bottom ball impact, thereby improving the protection effect of the battery monomers in the accommodation cavity.

[0016] In a second aspect, the application provides a power consuming device comprising the battery device of the first aspect, wherein the battery device is configured to provide electric energy.

[0017] In the technical scheme of the embodiments of the application, the power consuming device comprises the battery device, the battery device is enclosed by the frame and the bottom plate to form a receiving cavity, and the heat exchange channel is integrated in the bottom guard plate. The bottom guard plate is located on the side of the bottom plate away from the receiving cavity, which reduces the risk of leakage of the heat exchange medium into the interior of the battery device after the heat exchange channel is broken. At the same time, the bottom guard plate is detachably connected with the main body. When the heat exchange channel is damaged or broken, the bottom guard plate can be disassembled, repaired or replaced, thereby improving the maintainability of the battery device and the bottom ball impact resistance of the battery device. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the application, the drawings required to be used in the embodiments of the application will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the application, and other drawings can be obtained by the drawings without creative labor for those skilled in the art.

[0019] Fig. 1 is a structural schematic diagram of a vehicle disclosed by an embodiment of the application;

[0020] Fig. 2 is a structural schematic diagram of a battery device disclosed by an embodiment of the application;

[0021] Fig. 3 is a structural schematic diagram of a main body and a bottom guard plate disclosed by an embodiment of the application;

[0022] Fig. 4 is an exploded structural schematic diagram of the main body and the bottom guard plate disclosed by an embodiment of the application;

[0023] Fig. 5 is a sectional view of the main body and the bottom guard plate shown in Fig. 3 at A-A;

[0024] Fig. 6 is an enlarged view of the sectional view shown in Fig. 5 at B.

[0025] In the drawings, the drawings are not drawn according to the actual scale.

[0026] Label explanation:

[0027] Vehicle 1000;

[0028] Battery device 100, vehicle body main body 200;

[0029] Box 300, main body 310, box cover 320, frame 311, bottom plate 312, receiving cavity 313, bottom guard plate 330, first plate body 331, second plate body 332, convex part 333, assembly groove 335, heat exchange channel 340, sealing gasket 350, heat-conducting gasket 360;

[0030] Battery cell 400. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, and are not intended to describe a particular order or primary and secondary relationship.

[0033] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments.

[0034] In the description of the present application, the term "a plurality of" refers to more than two (including two).

[0035] In the description of the present application, the technical terms "thickness", "bottom", "side" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0036] In the description of the present application, it should be explained that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "attaching" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] At present, in the field of automobiles, electric vehicles have become the mainstream trend in the future. As the most core power supply component of the whole vehicle, the battery determines the key indicators such as the endurance mileage, cost, service life, etc. of the whole vehicle. In order to improve the cycle life and charge-discharge performance of the battery, the related technology arranges a water cooling plate in the box body of the battery, and the water cooling plate is bonded to the bottom of the battery monomer, so as to improve the thermal management performance of the battery, and then maintain good charge-discharge performance. However, this way of directly gluing the water cooling plate at the bottom of the battery monomer has the risk of cooling liquid leaking into the battery when the flow channel of the water cooling plate is broken, and the water cooling plate is not easy to disassemble and repair. When the water cooling plate flow channel is damaged due to battery collision, the whole battery is often scrapped, which is high in cost.

[0038] Based on the above consideration, the battery device provided by the embodiments of the present application includes a box body and a battery monomer. The box body includes a main body and a bottom guard plate. The main body includes a frame and a bottom plate. The bottom plate is connected to the frame and encloses a receiving cavity with the frame. The receiving cavity is used to accommodate the battery monomer. The bottom plate is in thermal conductive connection with the battery monomer. The bottom guard plate is arranged on the side of the bottom plate away from the receiving cavity and is detachably connected to the main body. The bottom guard plate has a heat exchange channel for accommodating a heat exchange medium. The bottom guard plate is in thermal conductive connection with the bottom plate.

[0039] The above-mentioned battery device forms a receiving cavity by enclosing the frame and the bottom plate, and integrates a heat exchange channel in the bottom guard plate. The bottom guard plate is located on the side of the bottom plate away from the receiving cavity, which reduces the risk of heat exchange medium leaking into the battery device when the heat exchange channel is broken. At the same time, the bottom guard plate is detachably connected to the main body. When the heat exchange channel is damaged or broken, the bottom guard plate can be disassembled, repaired or replaced, which improves the maintainability of the battery device and improves the bottom ball impact resistance of the battery device.

[0040] The battery device and the electric equipment disclosed by the embodiments of the present application can be used in various energy storage systems using the battery device as a power supply or using the battery device as an energy storage element. The electric equipment can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0041] The following embodiments are described by taking a vehicle as an example of a power consumption device in an embodiment of the present application for the convenience of description.

[0042] Please refer to FIG. 1, which is a structural schematic diagram of a vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric vehicle, a hybrid electric vehicle or a range extended vehicle, etc. The vehicle 1000 includes a battery device 100 and a vehicle body 200, and the battery device 100 is arranged on the vehicle body 200. The battery device 100 can be arranged at the bottom, the head or the tail of the vehicle body 200. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000.

[0043] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0044] Please refer to FIG. 2, which is an exploded view of the battery device 100 provided by some embodiments of the present application. The battery device 100 includes a box body 300 and a battery cell 400, and the battery cell 400 is contained in the box body 300. The box body 300 is used to provide a containing space for the battery cell 400, and the box body 300 can adopt various structures. In some embodiments, the box body 300 can include a main body 310 and a box cover 320, and the box cover 320 and the main body 310 are mutually covered to jointly define a containing space for containing the battery cell 400. The main body 310 can be a hollow structure with one side open, and the box cover 320 can be a plate structure, which is covered on the open side of the main body 310 to jointly define the containing space with the main body 310. The box cover 320 and the main body 310 can also be hollow structures with one side open, and the open side of the box cover 320 is covered on the open side of the main body 310. Of course, the box body 300 formed by the box cover 320 and the main body 310 can have various shapes, such as a cylinder, a cuboid, etc.

[0045] In the battery device 100, the battery cells 400 can be multiple, and the multiple battery cells 400 can be connected in series or in parallel or in a mixed manner. The mixed manner means that the multiple battery cells 400 are connected in series and in parallel. The multiple battery cells 400 can be directly connected in series or in parallel or in a mixed manner, and the whole of the multiple battery cells 400 is accommodated in the box body 300. Of course, the battery device 100 can also be that the multiple battery cells 400 are connected in series or in parallel or in a mixed manner to form a battery module, and the multiple battery modules are connected in series or in parallel or in a mixed manner to form a whole, and are accommodated in the box body 300. The battery device 100 can also include other structures, for example, the battery device 100 can also include a current collecting component for realizing the electrical connection between the multiple battery cells 400.

[0046] Each battery cell 400 can be a secondary battery cell or a primary battery cell, and can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited thereto. The battery cell 400 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes.

[0047] Referring to FIGS. 2, 3, and 4, the main body 310 includes a frame 311 and a bottom plate 312. The bottom plate 312 is connected to the frame 311 and encloses the frame 311 to form an accommodation cavity 313 for accommodating the battery cells 400. The bottom plate 312 is in thermal contact with the battery cells 400. The frame 311 can be a frame structure with a through hole in the middle, and the bottom plate 312 can be a plate structure. The bottom plate 312 is arranged on one side of the frame 311 to define the accommodation cavity 313 together with the frame 311. The shape of the bottom plate 312 is adapted to the frame 311, for example, the frame 311 is a rectangular frame structure, and the bottom plate 312 can be a rectangular plate structure. The battery cells 400 can be directly bonded to the bottom plate 312 by structural adhesive to achieve thermal contact with the bottom plate 312. The battery cells 400 can also be fixed to an intermediate partition plate, and the intermediate partition plate is fixed to the bottom plate 312, which also achieves thermal contact with the bottom plate 312. The box cover 320 is arranged on the side of the frame 311 away from the bottom plate 312 to form a closed accommodation space.

[0048] The battery device 100 also includes a bottom guard plate 330 arranged on the side of the bottom plate 312 away from the accommodation cavity 313 and detachably connected to the main body 310. The bottom guard plate 330 has a heat exchange channel 340 (see FIG. 6) formed therein, and the bottom guard plate 330 is in thermal contact with the bottom plate 312. The heat exchange channel 340 is used to circulate a heat exchange medium (such as water, air, etc.), and the heat exchange medium exchanges heat with the battery cells 400 through the heat transfer of the bottom guard plate 330 and the bottom plate 312.

[0049] The bottom protection plate 330 is arranged outside the main body 310, which is conducive to improving the crashworthiness of the main body 310 and protecting the box body 300. The bottom protection plate 330 can be detachably connected with the frame 311, or can be detachably connected with the bottom plate 312, or the bottom protection plate 330 can be detachably connected with the frame 311 and the bottom plate 312 respectively, so as to improve the connection stability of the bottom protection plate 330 and the main body 310. The bottom protection plate 330 can be stacked below the bottom plate 312 and directly contact the bottom plate 312 to realize the heat conduction connection with the bottom plate 312.

[0050] The battery device 100 forms a receiving cavity 313 for accommodating the battery monomer 400 by the frame 311 and the bottom plate 312, and integrates the heat exchange channel 340 in the bottom protection plate 330. The bottom protection plate 330 is located on the side of the bottom plate 312 away from the receiving cavity 313, which reduces the risk of leakage of the heat exchange medium into the inside of the battery device 100 after the heat exchange channel 340 is broken. At the same time, since the bottom protection plate 330 is not glued with the battery monomer 400, and the bottom protection plate 330 is detachably connected with the main body 310, the bottom protection plate 330 can be disassembled, repaired or replaced after the heat exchange channel 340 is damaged or broken, thereby improving the maintainability of the battery device 100 and the bottom ball impact resistance of the battery device 100.

[0051] In some embodiments, the battery device 100 further comprises a fastener (not shown in the figure), and the bottom protection plate 330 and the main body 310 are detachably connected by the fastener.

[0052] The fastener includes but is not limited to bolts, screws, studs, rivets or pins, etc. The fastener is provided through the bottom protection plate 330 and the main body 310, for example, the fastener is provided through the bottom protection plate 330 and the frame 311, or the fastener is provided through the bottom protection plate 330 and the bottom plate 312, or the fastener is provided through the bottom protection plate 330, the frame 311 and the bottom plate 312, which can detachably connect the bottom protection plate 330 to the main body 310. The detachable connection of the bottom protection plate 330 and the main body 310 by the fastener facilitates the installation and disassembly of the bottom protection plate 330.

[0053] In some embodiments, the bottom protection plate 330 is detachably connected with the frame 311. The detachable connection between the bottom protection plate 330 and the frame 311 includes but is not limited to bolt connection, buckle connection, etc., as long as the bottom protection plate 330 can be detached from the frame 311 without causing destructive damage to the frame 311. The frame 311 can include a plurality of structural beams connected in sequence. The bottom protection plate 330 can be detachably connected with one or more structural beams. For example, the frame 311 includes four structural beams connected in sequence, and the bottom protection plate 330 is detachably connected with the four structural beams to ensure the structural stability of the bottom protection plate 330.

[0054] The frame 311 is a main force-bearing structure of the box 300, and the thickness and structural strength of the frame 311 are greater than those of the bottom guard plate 330. By detachably connecting the bottom guard plate 330 to the frame 311, the connection stability of the bottom guard plate 330 can be improved by taking advantage of the high structural strength and thick thickness of the frame 311.

[0055] FIG. 5 is a sectional view of the main body 310 and the bottom guard plate 330, and FIG. 6 is an enlarged view of the sectional view shown in FIG. 5 at A. In combination with FIGS. 4 to 6, in some embodiments, the bottom guard plate 330 can include a first plate body 331 and a second plate body 332, which are arranged in sequence in a direction away from the bottom plate 312, i.e., the first plate body 331 is located between the bottom plate 312 and the second plate body 332. The first plate body 331 and the second plate body 332 are sealingly connected, and a heat exchange channel 340 is formed between the first plate body 331 and the second plate body 332.

[0056] The shapes of the first plate body 331 and the second plate body 332 are adapted to the frame 311. For example, the frame 311 is a rectangular surrounding frame structure, and the first plate body 331 and the second plate body 332 are both rectangular plate structures. The outer dimensions of the first plate body 331, the second plate body 332, and the bottom plate 312 are substantially the same. The first plate body 331 is stacked on a side of the bottom plate 312 away from the accommodation cavity 313, and the second plate body 332 is stacked on a side of the first plate body 331 away from the bottom plate 312. The heat exchange channel 340 is formed by sealingly connecting the first plate body 331 and the second plate body 332, which is convenient to manufacture and helps to improve the crashworthiness of the main body 310, thereby protecting the main body 310.

[0057] In some embodiments, the first plate body 331 protrudes toward the bottom plate 312 to form a protruding portion 333, and the second plate body 332 is arranged on the protruding portion 333 and forms the heat exchange channel 340 together with the protruding portion 333. The protruding portion 333 can extend in a curved manner along the plane of the first plate body 331 to increase the area ratio of the protruding portion 333 in the first plate body 331, thereby increasing the heat exchange area with the battery monomer 400.

[0058] The first plate body 331 can include an integrally formed flat portion and the protruding portion 333. The first plate body 331 is sealingly connected to the second plate body 332 through the flat portion, and the side of the protruding portion 333 away from the second plate body 332 is in contact with the bottom plate 312. The protruding portion 333 can strengthen the first plate body 331, thereby improving the structural stability of the first plate body 331.

[0059] In some embodiments, the second plate body 332 is detachably connected to the frame 311, and the second plate body 332 is recessed in a direction away from the bottom plate 312 to form an assembly groove 335, and the first plate body 331 is accommodated in the assembly groove 335.

[0060] The second plate body 332 is detachably connected to the frame 311 and covers the first plate body 331. The bottom guard plate 330 is connected to the frame 311 through the second plate body 332, and the first plate body 331 can not be directly connected to the frame 311.

[0061] The orthographic projection of the first plate body 331 falls within the orthographic projection range of the second plate body 332, wherein the orthographic projection direction of the first plate body 331 and the second plate body 332 is consistent with the arrangement direction of the first plate body 331 and the second plate body 332, that is, consistent with the thickness direction of the first plate body 331 and the second plate body 332. The orthographic projection of the first plate body 331 falls within the orthographic projection range of the second plate body 332, that is, the size of the first plate body 331 is smaller than the size of the second plate body 332, so that the second plate body 332 can completely cover the first plate body 331, so that the connection between the first plate body 331 and the second plate body 332 can be located on the inner side of the second plate body 332, and the second plate body 332 can protect the connection to a certain extent, reduce the risk of being damaged, and improve the stability of the sealed connection between the first plate body 331 and the second plate body 332.

[0062] The second plate body 332 can include a flat plate portion and an edge portion, and the edge portion is arranged around the outer periphery of the flat plate portion and is bent towards the frame 311 relative to the flat plate portion. The edge portion is detachably connected to the frame 311, and because the edge portion is bent towards the frame 311 relative to the flat plate portion, a fitting groove 335 is formed on the side of the flat plate portion towards the frame 311, and the first plate body 331 is arranged in the fitting groove 335 and is sealedly connected to the flat plate portion. By arranging the first plate body 331 in the fitting groove 335, the connection between the first plate body 331 and the second plate body 332 is also located in the fitting groove 335, thereby improving the sealing stability of the heat exchange channel 340.

[0063] The connection between the bottom plate 312 and the frame 311 can also be located in the fitting groove 335, that is, the bottom plate 312 is connected to the side of the frame 311 towards the bottom guard plate 330, thereby reducing the space occupied by the accommodation cavity 313 and being able to protect the connection between the bottom plate 312 and the frame 311 to a certain extent, reduce the risk of being damaged, and improve the connection stability of the bottom plate 312 and the frame 311.

[0064] In some embodiments, the outer size of the first plate body 331 is substantially equal to the outer size of the second plate body 332, and the first plate body 331 is at least partially sandwiched between the second plate body 332 and the frame 311 and is connected to the second plate body 332 and the frame 311.

[0065] The edge regions of the first plate body 331 and the second plate body 332 can be connected by brazing sealing, and then the first plate body 331 and the second plate body 332 are connected to the frame 311 by penetrating fasteners, so as to improve the connection strength of the bottom guard plate 330 and the frame 311.

[0066] In some embodiments, the main body 310 further comprises a sealing gasket 350 arranged between the frame 311 and the bottom plate 312, so as to seal the connection between the frame 311 and the bottom plate 312.

[0067] The sealing gasket 350 can be a frame structure surrounding the outer periphery of the bottom plate 312, so that the entire outer periphery of the bottom plate 312 can be sealed and connected with the frame 311. The sealing gasket 350 can be made of rubber, plastic or other sealing materials. During assembly, the sealing gasket 350 can be first stacked on the frame 311, and then the bottom plate 312 is stacked on the side of the sealing gasket 350 away from the frame 311, and then the bottom plate 312 and the frame 311 are connected by welding, bolt connection or FDS (Flow Drill Screws, hot melt self-tapping riveting) and the like. By using the sealing gasket 350 to be clamped between the bottom plate 312 and the frame 311, the sealing performance of the frame 311 and the bottom plate 312 can be improved, and the connection strength of the frame 311 and the bottom plate 312 can be improved.

[0068] In some embodiments, the battery device 100 further comprises a heat-conducting gasket 360 stacked between the bottom plate 312 and the bottom guard plate 330 and in contact with the bottom plate 312 and the bottom guard plate 330.

[0069] The heat-conducting gasket 360 can be a heat-conducting silica gel pad, a heat-conducting silicone pad, an insulating heat-conducting pad or a soft heat-dissipating pad, etc. The heat-conducting gasket 360 has substantially the same outer dimensions as the first plate body 331, so that the heat-conducting gasket 360 can substantially or completely cover the first plate body 331. By using the flexibility of the heat-conducting gasket 360, the heat-conducting gasket 360 can be well fitted to the bottom plate 312 and the bottom guard plate 330 to achieve full contact, thereby improving the heat transfer efficiency between the bottom plate 312 and the bottom guard plate 330 and accelerating the heat dissipation of the battery device 100. At the same time, the heat-conducting gasket 360 can also thicken the bottom of the main body 310, improve the resistance to bottom ball impact and the like, and further improve the protection effect of the battery monomer 400 in the accommodation cavity 313.

[0070] The edge region of the bottom plate 312 can be connected to the frame 311 toward one side of the bottom guard plate 330, and the middle region of the bottom plate 312 is protruded into the receiving cavity 313 relative to the edge region, which on one hand makes the middle region of the bottom plate 312 flush with the inner wall of the frame 311, facilitating the assembly of the components such as the battery monomer 400 in the receiving cavity 313. On the other hand, the middle region of the bottom plate 312 forms a space for avoiding on the side of the bottom guard plate 330, and the heat-conducting pad 360 is assembled in the space for avoiding, which can reduce the occupation of the space in the thickness direction of the main body 310.

[0071] The embodiments of the present application also provide a battery device 100 for providing electric energy.

[0072] Please refer to FIG. 2, FIG. 4 and FIG. 6, in some embodiments, the battery device 100 includes a box 300 and a battery monomer 400, the box 300 includes a main body 310, a heat-conducting pad 360 and a bottom guard plate 330, the main body 310 includes a frame 311 and a bottom plate 312, the bottom plate 312 is connected to the frame 311 toward one side of the bottom guard plate 330, and a sealing pad 350 is stacked between the bottom plate 312 and the frame 311. The bottom plate 312 and the frame 311 enclose a receiving cavity 313, the receiving cavity 313 is used for receiving the battery monomer 400, the battery monomer 400 is fixed on the bottom plate 312 by adhesive, realizing the heat-conducting connection between the bottom plate 312 and the battery monomer 400. The bottom guard plate 330 is arranged on the side of the bottom plate 312 away from the receiving cavity 313. The bottom guard plate 330 includes a first plate body 331 and a second plate body 332, the first plate body 331 and the second plate body 332 are arranged in sequence in the direction away from the bottom plate 312, the orthographic projection of the first plate body 331 falls within the orthographic projection range of the second plate body 332, the second plate body 332 is detachably connected to the frame 311 by bolts, and covers the first plate body 331, the first plate body 331 and the second plate body 332 are sealingly connected by brazing to form a heat exchange channel 340 between the first plate body 331 and the second plate body 332. The heat-conducting pad 360 is stacked between the bottom plate 312 and the first plate body 331, and is in contact with the bottom plate 312 and the first plate body 331. The heat exchange channel 340 is used for circulating heat exchange medium, and the heat exchange medium realizes heat exchange through the first plate body 331, the heat-conducting pad 360 and the battery monomer 400 on the bottom plate 312.

[0073] The battery device 100 is enclosed by the frame 311 and the bottom plate 312 to form a receiving cavity 313, and the heat exchange channel 340 is integrated in the bottom guard plate 330 located on the side of the bottom plate 312 away from the receiving cavity 313, which reduces the risk of leakage of the heat exchange medium to the inside of the battery device 100 after the heat exchange channel 340 is broken, and since the bottom guard plate 330 is not glued with the battery monomer 400 and the bottom guard plate 330 is detachably connected with the main body 310, the bottom guard plate 330 can be disassembled, repaired or replaced after the heat exchange channel 340 is damaged or broken, which improves the maintainability of the battery device 100 and improves the bottom ball impact resistance of the battery device 100.

[0074] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the application, and equivalent components therein can be replaced. In particular, the technical features mentioned in each embodiment can be combined in any way as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, comprising a box body and a battery cell, the box body comprising: a main body comprising a frame and a bottom plate, the bottom plate being connected to the frame and enclosing a receiving cavity with the frame, the receiving cavity being used for receiving the battery cell, the bottom plate being in thermal conductive connection with the battery cell; and a bottom guard plate arranged on a side of the bottom plate away from the receiving cavity and detachably connected to the main body, the bottom guard plate having a heat exchange channel formed therein for accommodating a heat exchange medium, the bottom guard plate being in thermal conductive connection with the bottom plate. The bottom guard plate is detachably connected to the frame.

2. The battery device of claim 1, wherein, The bottom guard plate comprises a first plate body and a second plate body, the first plate body and the second plate body being arranged in sequence in a direction away from the bottom plate, the first plate body and the second plate body being sealingly connected, the heat exchange channel being formed between the first plate body and the second plate body.

3. The battery device according to claim 1 or 2, wherein The first plate body has a protrusion formed by protruding towards the bottom plate, the second plate body being arranged on the protrusion and enclosing the heat exchange channel with the protrusion.

4. The battery device of claim 3, wherein, The second plate body is detachably connected to the frame, the second plate body having an assembly groove formed by recessing in a direction away from the bottom plate, the first plate body being accommodated in the assembly groove.

5. The battery device according to claim 3 or 4, wherein The first plate body is at least partially clamped between the second plate body and the frame and connected to the second plate body and the frame.

6. The battery device according to claim 3 or 4, wherein The main body further comprises a sealing gasket arranged between the frame and the bottom plate to sealingly connect the frame and the bottom plate.

7. The battery device according to any one of claims 1 to 6, wherein The battery device further comprises a fastener, the bottom guard plate and the main body being detachably connected by the fastener.

8. The battery device according to any one of claims 1 to 6, wherein The battery device further comprises a thermal conductive gasket arranged between the bottom plate and the bottom guard plate and in contact with the bottom plate and the bottom guard plate.

9. The battery device according to any one of claims 1 to 6, wherein 10.A power consuming device, comprising the battery device according to any one of claims 1-9, the battery device being used for providing electric energy. ​

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