Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device. The battery device comprises a battery monomer and a box body. The box body comprises a frame and a structural beam, a containing cavity is defined by the frame, and the battery monomers are arranged in the containing cavity; the structural beam is arranged in the accommodating cavity, two ends of the structural beam are connected with the frame, and the battery monomers are in heat-conducting connection with the structural beam; wherein the structural beam is a hollow beam, a first cavity and a second cavity are formed in the structural beam, the first cavity is used for allowing a heat exchange medium to flow, and the second cavity is used for allowing the wiring harness to be routed. Through the structure, the structural beam is provided with the first cavity, and the heat exchange medium can flow in the first cavity, so that the structural beam can perform heat exchange with the battery monomers in the box body, and the structural beam can perform heat management on the battery device besides playing a role in structurally supporting and fixing the battery monomers.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Art

[0002] The battery device generally includes a box and a plurality of battery cells disposed in the box, and the plurality of battery cells are connected in series or in parallel to form a battery module. The box is generally also provided with a beam, and in the prior art, the function of the beam is only to structurally support and fix the battery cells. Utility Model Content

[0003] In view of the above problems, the present application provides a battery device and an electrical device, so that the structural beams of the box body can not only play the role of structural support and fixation of the battery cells, but also be used for heat exchange with the battery cells, thereby playing a role in thermal management of the battery device.

[0004] In order to solve the above technical problems, a technical solution adopted by the present application is to provide a battery device, which includes a battery cell and a box. The box includes a frame and a structural beam, the frame is surrounded by a receiving cavity, and the battery cell is arranged in the receiving cavity; the structural beam is arranged in the receiving cavity, the two ends of the structural beam are connected to the frame, and the battery cell is thermally connected to the structural beam; wherein the structural beam is a hollow beam and forms a first cavity, and the first cavity is used for the flow of heat exchange medium; the structural beam also forms a second cavity, the second cavity is located on one side of the first cavity and isolated from the first cavity; wherein the second cavity is used for wiring harness.

[0005] In the battery device of the above structure, the structural beam has a first cavity, and the heat exchange medium can flow in the first cavity, so that the structural beam can exchange heat with the battery cells in the box body, so that in addition to providing structural support and fixing the battery cells, the structural beam can also perform thermal management on the battery device. On the other hand, the wiring harness for connecting the battery cells can be routed in the second cavity of the structural beam, and the wiring harness does not require additional space for routing, which can improve the space utilization of the accommodating cavity. In addition, the second cavity of the structural beam can also protect and insulate the wiring harness, and there is no need for additional insulation protection for the wiring harness.

[0006] In a possible implementation manner, a partition is disposed in the first cavity, and the partition divides the first cavity into flow channels.

[0007] With the above arrangement, the partition can guide the flow of the heat exchange medium, so that the heat exchange medium can flow evenly throughout the first cavity. In addition, the flow channel can allow the heat exchange medium flowing into the first cavity to fully exchange heat before flowing out, thereby improving the heat exchange efficiency between the structural beam and the battery cell.

[0008] In a possible implementation manner, a via hole is formed on the cavity wall of the second cavity of the structural beam, and the via hole is used for a wiring harness to pass through.

[0009] As described above, after the wiring harness is connected to the battery cell, the wiring harness can pass through the via hole to be routed in the second cavity and can pass out through the via hole.

[0010] In a possible implementation manner, a protective member is provided on the hole wall of the via hole.

[0011] As mentioned above, the protective member can protect the wiring harness and reduce the risk of the wiring harness being scratched by the hole wall at the through hole.

[0012] In a possible implementation manner, the box body further includes: a first seal, the end of the structural beam and the frame clamp the first seal, and the first seal seals the opening of the end of the second cavity.

[0013] The first sealing member can seal the second cavity, thereby reducing the problem of dust and foreign matter entering the second cavity.

[0014] In a possible embodiment, the structural beam also forms a third cavity, which is located on the side of the first cavity facing the bottom of the box body and isolated from the first cavity; the box body also includes: a bottom plate, which is arranged at the bottom of the frame to cover the accommodating cavity, and the bottom plate is connected to the cavity wall of the third cavity through a fixing member.

[0015] As described above, the third cavity of the structural beam is used to fix the bottom plate. The bottom plate is fixed solely through the third cavity, and there is no need to make a fixing hole on the first cavity, thereby reducing the risk of leakage of the heat exchange medium in the first cavity.

[0016] In a possible implementation manner, the fixing member is a screw, and a fixing hole cooperating with the screw is formed on the bottom plate and the cavity wall of the third cavity.

[0017] As described above, fixing holes are formed between the bottom plate and the third cavity, and the bottom plate can be fixed to the cavity wall of the third cavity by screws, and fixing the bottom plate will not affect the functions of the first cavity and the second cavity.

[0018] In a possible implementation manner, a sealing gasket is provided between the bottom plate and the frame, and the fixing member passes through the sealing gasket.

[0019] The above configuration can reduce the risk of leakage of the third cavity.

[0020] In a possible implementation manner, the box body further includes: a second sealing member, the end of the structural beam and the frame clamp the second sealing member, and the second sealing member seals the opening of the end of the third cavity.

[0021] The second seal can reduce the risk of leakage from the third cavity.

[0022] In a possible implementation manner, the box body further includes: a blocking piece, which is disposed at an end of the structural beam, and the blocking piece blocks an opening of the first cavity at the end of the structural beam.

[0023] As described above, the blocking member blocks the end of the structural beam, which can seal the end of the second cavity and reduce the risk of leakage of the heat exchange medium in the second cavity.

[0024] In a possible implementation manner, the blocking member is welded to the structural beam.

[0025] As described above, the integrity is better and the sealing effect is good.

[0026] In a possible embodiment, the blocking member is formed with a first positioning structure, and the end of the structural beam is formed with a second positioning structure; wherein, one of the first positioning structure and the second positioning structure is a protruding structure, and the other of the first positioning structure and the second positioning structure is a recessed structure that cooperates with the protruding structure.

[0027] As mentioned above, the first positioning structure and the second positioning structure can play a role in positioning the plugging member, and the plugging member can be pre-installed before welding, thereby improving the accuracy of the position of the plugging member after it is fixed.

[0028] In a possible implementation manner, a liquid inlet and a liquid outlet are formed on the blocking member, and both the liquid inlet and the liquid outlet are communicated with the first cavity.

[0029] As mentioned above, the heat exchange medium can flow into the first cavity through the liquid inlet and flow out of the first cavity through the liquid outlet.

[0030] In a possible implementation, the box body further includes: a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe and the liquid outlet pipe are arranged outside the frame, the liquid inlet pipe is connected to the liquid inlet, and the liquid outlet pipe is connected to the liquid outlet.

[0031] As mentioned above, the box body can be connected to an external heat exchange medium system through the liquid outlet pipe and the liquid inlet pipe.

[0032] In order to solve the above technical problem, another technical solution adopted by the present application is to provide an electrical device, which includes a battery device, and the battery device is the above-mentioned battery device, and the battery device is used to provide electrical energy.

[0033] In the above-mentioned electrical device, the structural beam has a first cavity, and the heat exchange medium can flow in the first cavity, so that the structural beam can exchange heat with the battery cells in the box body, so that in addition to playing the role of structural support and fixing the battery cells, the structural beam can also perform thermal management on the battery device.

[0034] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 is a schematic structural diagram of a vehicle according to one or more embodiments;

[0037] Figure 2 is a schematic structural diagram of a box in a battery device according to some embodiments;

[0038] Figure 3 is a schematic structural diagram of a battery cell in a battery device according to some embodiments;

[0039] Figure 4 for Figure 2 A schematic diagram of the structure of the box from a top view;

[0040] Figure 5 for Figure 2 Schematic diagram of the internal structure of the structural beam in the box;

[0041] Figure 6 for Figure 5 A magnified schematic diagram of the structure at C in the middle;

[0042] Figure 7 for Figure 4 Schematic diagram of the cross-sectional structure of the box along Aa;

[0043] Figure 8 for Figure 2 Side view of the longitudinal frame of the box.

[0044] Among them, 1000, vehicle; 200, controller; 300, motor; 100, battery device; 10, battery cell; 20, box; 21, frame; 211, horizontal frame; 212, vertical frame; 22, structural beam; 221, longitudinal beam; 23, bottom plate; 231, first cavity; 232, partition; 241, second cavity; 242, wiring harness; 243, via; 251, third cavity; 31, fixing part; 24, sealing gasket; 25, blocking part; 51, liquid inlet; 52, liquid outlet; 261, liquid inlet pipe; 262, liquid outlet pipe; 271, fourth cavity; 28, accommodating chamber; 291, first sealing member; 292, second sealing member. DETAILED DESCRIPTION

[0045] The following is a detailed description of the embodiments of the technical solution of the present application. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0047] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, unless otherwise clearly and specifically defined, the term "multiple" refers to more than two (including two), similarly, "multiple groups" refers to more than two (including two), and "multiple pieces" refers to more than two (including two).

[0048] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0050] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0051] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0052] At present, from the perspective of market development, batteries are being used more and more widely. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of battery application areas, the market demand is also constantly expanding.

[0053] The battery device generally includes a box and a plurality of battery cells disposed in the box, and the plurality of battery cells are connected in series or in parallel to form a battery module. The box is generally also provided with a beam, and in the prior art, the function of the beam is only to structurally support and fix the battery cells.

[0054] Based on the above considerations, in order to solve the technical problem of the single function of the structural beam in the prior art, the present application proposes a battery device and an electrical device. In the battery device, the structural beam is a hollow beam and a first cavity is formed, so that the heat exchange medium can flow inside the structural beam. The structural beam can also play a role in thermal management of the battery device.

[0055] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0056] Please refer to Figure 1 , Figure 1 is a schematic diagram of the structure of a vehicle according to one or more embodiments.

[0057] The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0058] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0059] In order to improve the performance of the electrical device, the present application provides a battery device, please refer to Figure 2 , Figure 5 and Figure 6 ; Figure 2 is a schematic structural diagram of a box in a battery device according to some embodiments; Figure 5 for Figure 2 Schematic diagram of the internal structure of the structural beam in the box; Figure 6 for Figure 5 Enlarged schematic diagram of the structure at point C in the middle.

[0060] In some embodiments, the battery device 100 includes a battery cell 10 and a box body 20. The box body 20 includes a frame 21 and a structural beam 22. The frame 21 is surrounded by a receiving cavity 28, and the battery cell 10 is arranged in the receiving cavity 28. The structural beam 22 is arranged in the receiving cavity 28, and the two ends of the structural beam 22 are connected to the frame 21. The battery cell 10 is thermally connected to the structural beam 22. Among them, the structural beam 22 is a hollow beam and forms a first cavity 231. The first cavity 231 is used for the flow of heat exchange medium. The structural beam 22 also forms a second cavity 241, which is located on one side of the first cavity 231 and is isolated from the first cavity; wherein the second cavity 241 is used for routing the wiring harness 242.

[0061] In this embodiment, the frame 21 includes two horizontal frames 211 and two vertical frames 212. The frame 21 is welded from four profiles. The accommodating cavity 28 enclosed by the frame 21 is rectangular. In some other embodiments, the frame 21 can also be a stamped frame, which is made by stamping. The stamped frame is integrally formed to form the accommodating cavity 28. In addition, in other embodiments, the accommodating cavity 28 enclosed by the frame 21 can also be a trapezoid, an irregular polygon, etc. Figure 3 , Figure 3 It is a schematic diagram of the structure of a battery cell in a battery device according to some embodiments. There are multiple battery cells 10, and the battery cells 10 are connected in series or in parallel to form a battery module. A crossbeam (not shown) and a longitudinal beam 221 are provided in the accommodating cavity 28. The crossbeam is parallel to the cross frame 211, and both ends of the crossbeam are fixed to the longitudinal frame 212. The longitudinal beam 221 is parallel to the longitudinal frame 212, and both ends of the longitudinal beam 221 are fixed to the cross frame 211. The length of the crossbeam is greater than the length of the longitudinal beam 221. By providing the crossbeam and the longitudinal beam 221, the structural strength of the box 20 can be enhanced. In addition, the crossbeam and the longitudinal beam 221 divide the accommodating cavity 28 into small areas, which can limit the battery cell 10 and prevent the battery cell 10 from deformation, and also facilitate the fixation of the battery cell 10. In this embodiment, the crossbeam among the crossbeams and the longitudinal beams 221 is a structural beam 22, and the heat exchange medium can flow in the first cavity 231 in the crossbeam, so that the crossbeam can exchange heat with the battery cell 10, and perform thermal management of the battery device 100. In some other embodiments, the longitudinal beam 221 among the crossbeams and the longitudinal beams 221 can be a structural beam 22, or both the crossbeams and the longitudinal beams 221 can be structural beams 22. In addition, in some other embodiments, the structural beams 22 can also be bent, and the structural beams 22 can also be arranged at an angle, and the angle between the two structural beams 22 can be an acute angle, a right angle, or an obtuse angle. The battery device 100 also includes a wiring harness 242 located in the box body 20, and the wiring harness 242 is used to connect the battery cell 10. The wiring harness 242 can also be connected to other components such as an electrical device or an external battery management device. In the related prior art, the wire harness 242 is routed in the accommodating cavity 28, and the wire harness 242 is arranged outside the structural beam 22. The wire harness 242 needs to occupy additional space in the accommodating cavity 28, and the space utilization rate of the accommodating cavity 28 is low. In this embodiment, the structural beam 22 forms a second cavity 241, so that the wire harness 242 can be routed in the structural beam 22, thereby improving the space utilization rate of the accommodating cavity 28. On the other hand, the wire harness 242 is routed in the structural beam 22, and the structural beam 22 separates the wire harness 242 from the battery cell 10, and the structural beam 22 also reduces the risk of short circuit between the wire harness 242 and the battery cell 10.

[0062] In the battery device 100 of the above structure, the structural beam 22 has a first cavity 231, and the heat exchange medium can flow in the first cavity 231, so that the structural beam 22 can exchange heat with the battery cell 10 in the box body 20, so that the structural beam 22 not only plays the role of structural support and fixing the battery cell 10, but also can perform thermal management on the battery device 100. On the other hand, the wiring harness 242 can be routed in the second cavity 241 of the structural beam 22, and the wiring harness 242 does not need to occupy additional space for routing, which can improve the space utilization rate of the accommodating cavity 28. In addition, the second cavity 241 of the structural beam 22 can also protect and insulate the wiring harness 242, and there is no need to provide additional insulation protection for the wiring harness 242, which reduces the risk of short circuit of the wiring harness 242. On the other hand, the wiring harness 242 can be hidden in the box body 20, making the interior of the box body 20 neat and beautiful.

[0063] In some embodiments, a partition 232 is disposed in the first cavity 231 , and the partition 232 divides the first cavity 231 into flow channels.

[0064] The partition 232 can be an integrally formed structure with the structural beam 22, and the structural beam 22 can be made by stamping. During stamping, the first cavity 231 of the structural beam 22 and the partition 232 in the first cavity 231 are formed. In other embodiments, the partition 232 can also be welded and fixed in the first cavity 231. The number of partitions 232 in the first cavity 231 can be one or more. In this embodiment, the number of partitions 232 in the first cavity 231 is multiple, and each partition 232 is parallel to the structural beam 22. The ends of some partitions 232 are connected, so that the flow channel in the first cavity 231 is bent in multiple sections, and each section of the flow channel is parallel to the structural beam 22. In some other embodiments, the partition 232 in the first cavity 231 can also be arranged perpendicular to the structural beam 22, or the partitions 232 can be arranged at an angle, and the arrangement of the partition 232 in the first cavity 231 and the structural shape of the flow channel can be other styles.

[0065] As mentioned above, by setting the partition 232 in the first cavity 231, the partition 232 can guide the flow of the heat exchange medium, so that the heat exchange medium can flow evenly everywhere in the first cavity 231. In addition, the flow channel can make the heat exchange medium flowing into the first cavity 231 fully heat exchanged before flowing out, thereby improving the heat exchange efficiency between the structural beam 22 and the battery cell 10.

[0066] In some embodiments, a through hole 243 is formed on the wall of the second cavity 241 of the structural beam 22 , and the through hole 243 is used for the wire harness 242 to pass through.

[0067] There are multiple through holes 243 on the structural beam 22. One end of the wire harness 242 extends into the second cavity 241 of the structural beam 22 from one through hole 243, and the other end of the wire harness 242 can extend out of the second cavity 241 of the structural beam 22 from another through hole 243. In some preferred embodiments, a protective member (not shown) is further provided on the hole wall of the through hole 243. The protective member can be made of rubber, elastic plastic, silicone, etc. The protective member is annular and covers the hole wall of the through hole 243.

[0068] As described above, after the wire harness 242 is connected to the battery cell 10, the wire harness 242 can pass through the via hole 243 to be routed in the second cavity 241 and can pass through the via hole 243. In addition, the protective member can protect the wire harness 242 and reduce the risk of the wire harness 242 being scratched by the hole wall at the via hole 243.

[0069] In some other preferred embodiments, an elastic seal (not shown) is further provided at the through hole 243 of the second cavity 241, the elastic seal covers the through hole 243, and the elastic seal has an elastic hole. The wire harness 242 passes through the elastic hole on the elastic seal and enters the second cavity 241, wherein the elastic hole is elastic, and the hole wall of the elastic hole will be tightly attached to the wire harness 242 due to the elasticity.

[0070] As described above, by providing an elastic seal with an elastic hole, the elastic seal can protect the wiring harness 242. On the other hand, the elastic seal can block the gap between the via hole 243 and the wiring harness 242, and can reduce the risk of impurities such as dust entering the second cavity 241.

[0071] In some embodiments, the box body 20 further includes a first seal 291 , and the end of the structural beam 22 and the frame 21 clamp the first seal 291 , and the first seal 291 seals the opening at the end of the second cavity 241 .

[0072] The first seal 291 may be a rubber seal, a plastic seal, a resin seal, etc. In this embodiment, the first seal 291 is fixed to the opening at the end of the second cavity 241 by clamping the end of the structural beam 22 and the frame 21. In other embodiments, one side of the first seal 291 is partially pressed into the opening at the end of the second cavity 241, and the first seal 291 is fixed to the opening at the end of the second cavity 241 by interference fit, and is arranged on the other side of the first seal 291 by the frame 21, which can enhance the fixing effect of the first seal 291. In other embodiments, one side of the first seal 291 can also be fixed to the opening at the end of the second cavity 241 by other methods such as bonding and embedding.

[0073] As described above, the first sealing member 291 can seal the second cavity 241 , thereby reducing the problem of dust and foreign matter entering the second cavity 241 .

[0074] Please refer to Figure 4 and Figure 7 , Figure 4 for Figure 2 Schematic diagram of the box structure from top view. Figure 7 for Figure 4 Schematic diagram of the cross-sectional structure of the box along Aa. In some embodiments, the structural beam 22 is further formed with a third cavity 251, which is located on the side of the first cavity 231 facing the bottom of the box 20 and is isolated from the first cavity 231. The box 20 also includes a bottom plate 23, which is disposed at the bottom of the frame 21 to cover the accommodating cavity 28. The bottom plate 23 is connected to the cavity wall (not shown) of the third cavity 251 through a fixing member 31.

[0075] The third cavity 251 is located at the bottom of the box 20. In this embodiment, the first cavity 231 is located between the second cavity 241 and the third cavity 251, and the second cavity 241 is located at the top of the box 20. In some other embodiments, the second cavity 241 can also be located between the first cavity 231 and the third cavity 251, and the first cavity 231 is located at the top of the box 20. Among them, the bottom plate 23 supports and protects the components inside the box 20. In some other embodiments, the bottom plate 23 can also be a heat exchange plate to jointly perform thermal management on the battery device 100 through the bottom plate 23 and the structural beam 22. Among them, the third cavity 251 is used to fix the bottom plate 23. In this embodiment, the fixing member 31 is a screw, and the bottom plate 23 and the cavity wall of the third cavity 251 are formed with a fixing hole that cooperates with the screw. In some other embodiments. The fixing member 31 can also be a rivet, a bolt, etc. Further, in some embodiments, the bottom plate 23 is also connected to the frame 21 through the fixing member 31.

[0076] As described above, the base plate 23 is fixed separately by the third cavity 251 of the structural beam 22, and there is no need to make fixing holes on the first cavity 231 or the second cavity 241, thereby reducing the risk of leakage of the heat exchange medium in the first cavity 231 or the risk of damage to the wiring harness 242 in the second cavity 241.

[0077] In some embodiments, a sealing gasket 24 is disposed between the bottom plate 23 and the frame, and the fixing member 31 passes through the sealing gasket 24 .

[0078] The sealing gasket 24 is disposed between two corresponding fixing holes of the bottom plate 23 and the third cavity 251 . The sealing gasket 24 can improve the sealing effect between the bottom plate 23 and the third cavity 251 .

[0079] In some embodiments, the box body further includes: a second sealing member 292, the end of the structural beam and the frame clamp the second sealing member 292, and the second sealing member 292 seals the opening at the end of the third cavity.

[0080] The second seal 292 may be a rubber seal, a plastic seal, a resin seal, etc. In this embodiment, the second seal 292 is fixed to the opening at the end of the third cavity 251 by clamping the end of the structural beam 22 and the frame 21. In other embodiments, one side of the second seal 292 is partially pressed into the opening at the end of the third cavity 251, and the second seal 292 is fixed to the opening at the end of the third cavity 251 by interference fit, and is arranged on the other side of the second seal 292 by the frame 21, which can enhance the fixing effect of the second seal 292. In other embodiments, one side of the second seal 292 can also be fixed to the opening at the end of the third cavity 251 by other methods such as bonding and embedding.

[0081] The second seal 292 can reduce the risk of leakage of the third cavity.

[0082] In some embodiments, the box body 20 further includes a blocking member 25 . The blocking member 25 is disposed at the end of the structural beam 22 , and the blocking member 25 blocks the opening of the first cavity 231 at the end of the structural beam 22 .

[0083] The plugging member 25 is welded to the structural beam 22, and the plugging member 25 is used to plug the opening of the first cavity 231 at the end to reduce the risk of leakage of the heat exchange medium. In this embodiment, the plugging member 25 and the structural beam 22 are welded by brazing. In some other embodiments, the plugging member 25 and the structural beam 22 can also be fixed by welding methods such as stir friction welding and arc welding. In addition, the plugging member 25 can also be fixed to the two ends of the structural beam 22 by other methods such as clamping and bonding.

[0084] As described above, the blocking member 25 blocks the end of the structural beam 22, which can seal the first cavity 231 and reduce the risk of heat exchange medium leakage. In addition, the blocking member 25 is welded to the structural beam 22, which has better structural integrity and good sealing effect.

[0085] In some embodiments, the blocking member 25 is formed with a first positioning structure (not shown), and the end of the structural beam 22 is formed with a second positioning structure (not shown); wherein, one of the first positioning structure and the second positioning structure is a protruding structure, and the other of the first positioning structure and the second positioning structure is a recessed structure that cooperates with the protruding structure.

[0086] In this embodiment, the first positioning structure is a convex structure, and the second positioning structure is a concave structure. The convex structure and the concave structure are interlocked with each other, and the fixing of the plugging member 25 can be facilitated by the convex structure and the concave structure, so that the blind installation of the plugging member 25 can be realized, and the welding position of the plugging member 25 can be accurate after installation. In addition, the number of the first positioning structure on the plugging member 25 can be one or more. In some other embodiments, the first positioning structure can also be a concave structure, and the second positioning structure can also be a convex structure.

[0087] As mentioned above, the first positioning structure and the second positioning structure can play a role in positioning the blocking member 25 , and can pre-install the blocking member 25 before welding, thereby improving the accuracy of the position of the blocking member 25 after it is fixed.

[0088] Please refer to Figure 8 , Figure 8 for Figure 2 A side view of one side of the longitudinal frame in the box. In some embodiments, a liquid inlet 51 and a liquid outlet 52 are formed on the blocking member 25, and the liquid inlet 51 and the liquid outlet 52 are both connected to the first cavity 231. The box 20 also includes: a liquid inlet pipe 261 and a liquid outlet pipe 262, which are arranged outside the frame 21, and the liquid inlet pipe 261 is connected to the liquid inlet 51, and the liquid outlet pipe 262 is connected to the liquid outlet 52.

[0089] The heat exchange medium enters the first cavity 231 of the structural beam 22 through the liquid inlet 51, flows in the first cavity 231 and then flows out of the first cavity 231 from the liquid outlet 52, thereby realizing a heat exchange cycle. The number of the liquid inlet 51 and the liquid outlet 52 can be one or more.

[0090] As described above, the heat exchange medium can flow into the first cavity 231 through the liquid inlet 51 and flow out of the first cavity 231 through the liquid outlet 52. The housing 20 can be connected to an external heat exchange medium supply system through the liquid outlet pipe 262 and the liquid inlet pipe 261.

[0091] The present application also provides an electric device, which includes a battery device 100. It should be noted that the battery device 100 in this embodiment is the battery device 100 described in the above embodiments, and will not be described in detail here.

[0092] In the battery device 100 of the above structure, the structural beam 22 has a first cavity 231, and the heat exchange medium can flow in the first cavity 231, so that the structural beam 22 can exchange heat with the battery cell 10 in the box body 20, so that in addition to playing the role of structural support and fixing the battery cell 10, the structural beam 22 can also perform thermal management on the battery device 100.

[0093] In some embodiments, the structural beam 22 further includes a fourth cavity 271, and the box body 20 further includes a cover plate (not shown), which is disposed on the top of the box body 20 and is configured to open or cover the accommodating cavity 28. The fourth cavity 271 is located at the top of the box body 20, and the fourth cavity 271 is used to fix the cover plate, which can be fixed to the fourth cavity 271 of the structural beam 22 by screws or bolts, etc., to reduce the risk of leakage of the first cavity 231 or the second cavity 241. In addition, a hole structure corresponding to the through hole 243 on the third cavity 251 is formed in the fourth cavity 271 to facilitate the passage of the wiring harness 242.

[0094] Finally, in a specific application scenario, the problem of the single function of the beam in the existing battery device 100 is addressed. The battery device 100 of the present application includes a battery cell 10 and a box body 20. The box body 20 includes a frame 21 and a structural beam 22. The frame 21 is surrounded by a receiving cavity 28, and the battery cell 10 is arranged in the receiving cavity 28; the structural beam 22 is arranged in the receiving cavity 28, and the two ends of the structural beam 22 are connected to the frame 21; the battery cell 10 is thermally connected to the structural beam 22. Among them, the structural beam 22 is a hollow beam and forms a first cavity 231, and the first cavity 231 is used for the flow of heat exchange medium. A partition 232 is arranged in the first cavity 231, and the partition 232 divides the first cavity 231 into a flow channel. The structural beam 22 also forms a second cavity 241, and the second cavity 241 is located on one side of the first cavity 231; wherein the second cavity 241 is used for routing the wiring harness 242. The structural beam 22 is formed with a through hole 243 on the cavity wall of the second cavity 241, and the through hole 243 is used for the wiring harness 242 to pass through. A protective member is arranged on the hole wall of the through hole 243. The structural beam 22 is also formed with a third cavity 251, and the third cavity 251 is located on the side of the first cavity 231 facing the bottom of the box body 20, and is isolated from the first cavity 231. The box body 20 also includes: a bottom plate 23, the bottom plate 23 is arranged at the bottom of the box body 20, and the bottom plate 23 is connected to the cavity wall of the third cavity 251 through a fixing member 31. The fixing member 31 is a screw, and the bottom plate 23 and the cavity wall of the third cavity 251 are formed with a fixing hole that cooperates with the screw. A sealing gasket 24 is arranged between the bottom plate 23 and the frame 21. The box body 20 also includes: a blocking member 25, which is arranged at the end of the structural beam 22, and the blocking member 25 blocks the opening of the first cavity 231 at the end of the structural beam 22.

[0095] In the above manner, the structural beam 22 has a first cavity 231, and the heat exchange medium can flow in the first cavity 231, so that the structural beam 22 can exchange heat with the battery cell 10 in the box body 20, so that in addition to playing the role of structural support and fixing the battery cell 10, the structural beam 22 can also perform thermal management on the battery device 100.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: The battery device comprises: Battery cells; A box body, the box body comprising a frame and a structural beam, the frame is surrounded by a receiving cavity, the battery cell is arranged in the receiving cavity; the structural beam is arranged in the receiving cavity, the two ends of the structural beam are connected to the frame, the battery cell is thermally connected to the structural beam; wherein the structural beam is a hollow beam and forms a first cavity, the first cavity is used for the heat exchange medium to flow; The structural beam is further formed with a second cavity, which is located on one side of the first cavity and isolated from the first cavity; wherein the second cavity is used for routing the wiring harness.

2. The battery device according to claim 1, characterized in that: A partition is disposed in the first cavity, and the partition divides the first cavity into flow channels.

3. The battery device according to claim 1, characterized in that: The structural beam has a via formed on the cavity wall of the second cavity, and the via is used for the wiring harness to pass through.

4. The battery device according to claim 3, characterized in that: A protective piece is arranged on the hole wall of the via hole.

5. The battery device according to claim 1, characterized in that: The box also includes: A first sealing member is clamped by the end of the structural beam and the frame, and the first sealing member seals the opening of the end of the second cavity.

6. The battery device according to claim 1, characterized in that: The structural beam is further formed with a third cavity, the third cavity is located on a side of the first cavity facing the bottom of the box body and is isolated from the first cavity; The box also includes: A bottom plate is arranged at the bottom of the frame to cover the accommodating cavity, and the bottom plate is connected to the cavity wall of the third cavity through a fixing member.

7. The battery device according to claim 6, characterized in that: The fixing member is a screw, and the bottom plate and the cavity wall of the third cavity are formed with fixing holes that cooperate with the screw.

8. The battery device according to claim 6, characterized in that: A sealing gasket is arranged between the bottom plate and the frame, and the fixing piece passes through the sealing gasket.

9. The battery device according to claim 6, characterized in that: The box also includes: A second sealing member is clamped between the end of the structural beam and the frame, and the second sealing member seals the opening at the end of the third cavity.

10. The battery device according to claim 1, characterized in that: The box also includes: A blocking piece is provided at the end of the structural beam, and the blocking piece blocks the opening of the first cavity at the end of the structural beam.

11. The battery device according to claim 10, characterized in that: The blocking member is welded to the structural beam.

12. The battery device according to claim 10, characterized in that: The blocking member is formed with a first positioning structure, and the end of the structural beam is formed with a second positioning structure; wherein, one of the first positioning structure and the second positioning structure is a protruding structure, and the other of the first positioning structure and the second positioning structure is a recessed structure matching the protruding structure.

13. The battery device according to claim 10, characterized in that: A liquid inlet and a liquid outlet are formed on the blocking member, and both the liquid inlet and the liquid outlet are communicated with the first cavity.

14. The battery device according to claim 13, characterized in that: The box also includes: A liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe and the liquid outlet pipe are arranged outside the frame, the liquid inlet pipe is communicated with the liquid inlet, and the liquid outlet pipe is communicated with the liquid outlet.

15. An electrical device, characterized in that: The electrical device comprises the battery device according to any one of claims 1 to 14, and the battery device is used to provide electrical energy.

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