Battery box and vehicle

Abstract

The utility model relates to the technical field of vehicle parts, and provides a battery box and a vehicle, the battery box comprises a frame, a cold plate assembly and an integrally formed shell, the frame is located in the outer space of the shell, the cold plate assembly is located in the inner space of the shell, and the cold plate assembly is located in the outer space of the shell. The shell comprises a bottom wall and a side wall arranged around the bottom wall, the frame is arranged in the circumferential direction of the shell and connected to the side wall of the shell, and the cold plate assembly is connected to the bottom wall and the side wall of the shell. Therefore, the shell of the battery box body is integrally formed, so that the sealing can be realized, the sealing reliability can be ensured, the sealing difficulty can be reduced, the welding operation and the requirements on assembly stations such as a welding station are reduced, and the assembly convenience of the battery box body is improved; therefore, the battery box body has the characteristics of good sealing performance, simplicity in assembly, less time consumption, less requirement on assembly stations, low manufacturing cost and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle parts, and in particular to a battery box and a vehicle. Background Art

[0002] Power batteries are important components of new energy vehicles, used to provide driving power for new energy vehicles. Traditional power batteries mainly include battery modules, battery boxes and bottom guards. The battery box and bottom guard are usually connected by bolts, and the frame of the battery box is mainly assembled by assembling and welding the frame of extruded aluminum profiles or rolled steel profiles. The frame and the cold plate (or bottom plate) are sealed and connected by FSW (Friction Stir Welding) or FDS (Flow Drill Screw) to form a shell. At the same time, extruded aluminum profiles or rolled steel profiles are used as internal crossbeams and longitudinal beams to fix other components.

[0003] At present, most of the components of the battery case are usually connected and fastened by welding, or by casting with rivets and bolts. For welding, since the battery case is under heavy load and vibration conditions for a long time, the welding parts of the battery case are prone to fatigue cracking, and the reliability is low. For the casting + rivet riveting + bolt connection method, although the connection reliability is high, the assembly process is complicated, the working time is long, the precision requirements are high, and the manufacturing cost is high. Utility Model Content

[0004] The problem solved by the utility model is: how to improve the convenience of assembling a battery box while ensuring the reliability of the connection between the components of the battery box.

[0005] To solve the above problems, the utility model provides a battery box, including a frame, a cold plate assembly and an integrally formed shell, the frame is located in the external space of the shell, the cold plate assembly is located in the internal space of the shell, the shell includes a bottom wall and a side wall arranged around the bottom wall, the frame is arranged along the circumference of the shell and connected to the side wall of the shell, and the cold plate assembly is connected to the bottom wall and the side wall of the shell.

[0006] Optionally, the cold plate assembly includes a first reinforcing beam, a second reinforcing beam and a cold plate, the cold plate is connected to the bottom wall and the side wall of the shell, the first reinforcing beam and the second reinforcing beam are staggered and respectively connected to one side of the cold plate away from the bottom wall of the shell.

[0007] Optionally, the cold plate includes a flat portion and a bent portion, the flat portion is arranged parallel to the bottom wall, the bent portions are relatively arranged at two ends of the flat portion, and the second reinforcing beam is located between the two bent portions; a first connecting hole is provided on the flat portion, and a middle part of the second reinforcing beam is connected to the flat portion at the first connecting hole by a fastener, and / or a second connecting hole is provided on the bent portion, and two ends of the second reinforcing beam are respectively connected to the corresponding bent portions at the second connecting hole by fasteners.

[0008] Optionally, the cold plate includes a first flow channel plate layer, a second flow channel plate layer and a flat plate layer stacked in sequence, the first flow channel plate layer is connected to the bottom wall of the shell, and the first reinforcement beam and the second reinforcement beam are respectively connected to the flat plate layer.

[0009] Optionally, when the first connecting hole is provided on the flat portion, the first connecting hole passes through the first flow channel plate layer, the second flow channel plate layer and the flat plate layer; when the second connecting hole is provided on the bent portion, the second connecting hole passes through the second flow channel plate layer and the flat plate layer.

[0010] Optionally, the first reinforcement beam and the second reinforcement beam are connected by a mortise and tenon structure.

[0011] Optionally, the battery box further includes a buffer pad, and the buffer pad is arranged between the cold plate and the bottom wall of the shell.

[0012] Optionally, the first reinforcing beam, the second reinforcing beam and the cold plate enclose a plurality of cavities, and the buffer pads are arranged in a one-to-one correspondence with the cavities.

[0013] Optionally, a resin layer is provided on a side of the bottom wall of the shell facing away from the cold plate assembly and / or the frame is welded to the side wall of the shell.

[0014] In order to solve the above problems, the utility model also provides a vehicle, comprising the battery box as described above.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The battery box of the utility model can be assembled by arranging the frame along the circumference of the shell and connecting it to the side wall of the shell by welding, for example, and placing the cold plate assembly on the bottom wall of the shell and connecting it to the bottom wall and side wall of the shell by welding, for example, to ensure reliable connection between the components of the battery box. At the same time, by arranging the shell to be integrally formed, the shell, for example, adjacent side walls and the bottom wall and side walls are seamlessly connected, so that both sealing and sealing reliability can be achieved. Moreover, compared with the prior art in which the frame and the cold plate are sealed by welding to form a shell structure, the difficulty of sealing can be reduced, the welding operation and the demand for assembly stations such as welding stations can be reduced, and the convenience of battery box assembly can be improved, so that the battery box of the utility model has the characteristics of good sealing, simple assembly, less time consumption, less demand for assembly stations, and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the battery box in the embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the assembly structure of the battery box in the embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure in which the cold plate assembly is assembled inside the shell in the embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the cold plate assembly, the shell and the buffer pad in the embodiment of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the cold plate assembly in the embodiment of the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the cold plate in the embodiment of the utility model;

[0023] Figure 7 It is a schematic diagram of the structure of the first reinforcement beam and the second reinforcement beam in an embodiment of the utility model;

[0024] Figure 8 It is a schematic diagram of the local structure of the cold plate at the second connecting hole in an embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 1. Frame; 2. Cold plate assembly; 21. First reinforcing beam; 22. Second reinforcing beam; 221. Mortise; 23. Cold plate; 231. Flat portion; 2311. First connecting hole; 232. Bending portion; 2321. Second connecting hole; 233. First flow channel plate layer; 234. Second flow channel plate layer; 235. Flat plate layer; 24. Cavity; 25. Third reinforcing beam; 3. Shell; 31. Bottom wall; 32. Side wall; 4. Buffer pad; 5. Cooling pipeline. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] The Z axis in the accompanying drawings represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom; the X axis in the accompanying drawings represents the horizontal direction, and is designated as the front and back position, and the positive direction of the X axis represents the front side, and the reverse direction of the X axis represents the back side; the Y axis in the accompanying drawings represents the left and right positions, and the positive direction of the Y axis represents the left side, and the reverse direction of the Y axis represents the right side. It should also be noted that the aforementioned Z axis, Y axis, and X axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.

[0030] Combination Figure 1 and Figure 2 As shown, an embodiment of the utility model provides a battery box, including a frame 1, a cold plate assembly 2 and an integrally formed shell 3, the frame 1 is located in the external space of the shell 3, the cold plate assembly 2 is located in the internal space of the shell 3, the shell 3 includes a bottom wall 31 and a side wall 32 arranged around the bottom wall 31, the frame 1 is arranged along the circumference of the shell 3 and is connected to the side wall 32 of the shell 3, and the cold plate assembly 2 is connected to the bottom wall 31 and the side wall 32 of the shell 3.

[0031] Specifically, the shell 3 of the battery box is usually a hollow rectangular parallelepiped structure with an open top, which is usually formed by integral stamping of a plate such as a high-strength steel plate. The frame 1 is usually a rolled steel profile, which can be set around the side wall 32 of the shell 3 in a full circle, in which case the frame 1 is a closed ring structure. The frame 1 can also be set around part of the side wall 32 of the shell 3, in which case the frame 1 is a ring structure with a gap, such as Figure 2 As shown. Moreover, the frame 1 and the side wall 32 of the shell 3 are usually fixedly connected by welding, so that the frame 1 and the shell 3 are connected as a whole, thereby improving the rigidity of the battery box. The cold plate assembly 2 is arranged inside the shell 3 and placed on the bottom wall 31 of the shell 3. At the same time, the cold plate assembly 2 is also fixedly connected to the side wall 32 of the shell 3 by welding, so that the cold plate assembly 2 and the shell 3 are connected as a whole, thereby improving the rigidity of the battery box.

[0032] The battery case in this embodiment can be assembled by arranging the frame 1 along the circumference of the shell 3 and connecting it to the side wall 32 of the shell 3 by, for example, welding, placing the cold plate assembly 2 on the bottom wall 31 of the shell 3 and connecting it to the side wall 32 of the shell 3 by, for example, welding, so as to ensure reliable connection between the components of the battery case. At the same time, by arranging the shell 3 to be integrally formed, the shell 3, for example, adjacent side walls 32 and the bottom wall 31 and the side wall 32 are seamlessly connected, so that both sealing and sealing reliability can be achieved. Moreover, compared with the prior art in which the frame and the cold plate are sealed by welding to form a shell structure, the difficulty of sealing can be reduced, the welding operation and the demand for assembly stations such as welding stations can be reduced, and the convenience of battery case assembly can be improved, so that the battery case in this embodiment has the characteristics of good sealing, simple assembly, less time consumption, less demand for assembly stations, and low manufacturing cost. In addition, since there is no need for the cold plate 23 in the cold plate assembly 2 to provide sealing for the battery box, the size of the cold plate 23 can be controlled within the installation area of ​​the battery module, thereby reducing the volume and weight of the cold plate 23 and reducing the manufacturing cost of the cold plate 23.

[0033] Optionally, a resin layer is provided on a side of the bottom wall 31 of the housing 3 facing away from the cold plate assembly 2 .

[0034] Since the battery box body and the bottom guard plate of the power battery are usually connected by bolts, a large number of rivet nuts (also known as blind rivet nuts) need to be added to the battery box body, resulting in a heavy weight, high cost, and long time-consuming of the battery box body. Therefore, in this embodiment, a resin layer such as polyvinyl chloride (PVC for short) is sprayed on the outer surface of the bottom wall 31 of the housing 3 (that is, the surface of the bottom wall 31 on the side背离 from the cold plate assembly 2), so that the bottom of the housing 3 has high rigidity and corrosion resistance at the same time. In this way, the bottom wall 31 of the housing 3 can be used to replace the bottom guard plate of the power battery, so that the battery box body can use the housing 3 to meet the bottom protection of the power battery, greatly simplifying the production process of the power battery; moreover, there is no need to separately set and install the bottom guard plate, which is equivalent to omitting the bottom guard plate, gasket and related fasteners, which can not only reduce the types of materials, save working hours, and reduce costs, but also effectively reduce the overall weight of the power battery.

[0035] Optionally, in combination with Figure 3 As shown, the cold plate assembly 2 includes a first reinforcing beam 21, a second reinforcing beam 22, and a cold plate 23. The cold plate 23 is connected to the bottom wall 31 and the side wall 32 of the housing 3. The first reinforcing beam 21 and the second reinforcing beam 22 are arranged in a staggered manner and are respectively connected to the side of the cold plate 23背离 from the bottom wall 31 of the housing 3.

[0036] In this embodiment, the first reinforcing beam 21 and the second reinforcing beam 22 are usually roll-formed steel profiles and are arranged in a staggered manner, that is, the first reinforcing beam 21 and the second reinforcing beam 22 can be perpendicular to each other on the horizontal plane (that is, the Figure 1 XY plane in Figure 1 ), or can be arranged to form an acute angle or an obtuse angle. In practical applications, the first reinforcing beam 21 is usually arranged to extend longitudinally, that is, to extend along the Figure 1 X-axis direction in Figure 3 ), and the second reinforcing beam 22 is arranged to extend transversely, that is, to extend along the Y-axis direction in

[0037] ), that is to say, the first reinforcing beam 21 and the second reinforcing beam 22 are arranged perpendicularly. One or more first reinforcing beams 21 and second reinforcing beams 22 can be provided. For example, As shown, one first reinforcing beam 21 and three second reinforcing beams 22 are provided, and moreover, the three second reinforcing beams 22 are respectively connected to both ends and the middle position of the first reinforcing beam 21 to form a "king" character structure. The shape of the cold plate 23 is usually the same as the shape of the bottom wall 31 of the housing 3, and moreover, the size of the cold plate 23 can be equal to the size of the bottom wall 31 or smaller than the size of the bottom wall 31, and can be set according to needs in practical applications. Moreover, the first reinforcing beam 21 and the cold plate 23 are usually connected by welding, and the second reinforcing beam 22 and the cold plate 23 are usually connected by riveting.

[0038] Figure 3In this way, by arranging the first reinforcing beam 21 and the second reinforcing beam 22 on the side of the cold plate 23 away from the bottom wall 31 of the shell 3, and making the first reinforcing beam 21 and the second reinforcing beam 22 staggered, the first reinforcing beam 21 and the second reinforcing beam 22 are used to form an area for accommodating the battery module inside the battery box, and play the role of improving the strength and rigidity and fixing the cold plate 23, so as to ensure the reliability of the battery module when installed in the battery box. In addition, by welding between the first reinforcing beam 21 and the cold plate 23 and riveting between the second reinforcing beam 22 and the cold plate 23, the components of the battery box can be assembled and sealed only by ordinary stamping, welding, and riveting, so that the production process of the battery box can be simplified to a large extent while improving the reliability of the seal, reducing the requirements of the battery box for assembly tools, reducing the requirements of the battery box for assembly stations, reducing assembly time, and reducing manufacturing costs.

[0038] Furthermore, combined with Figure 3 As shown, the cold plate 23 has a first end and a second end along a set direction, the first reinforcing beam 21 extends from the first end to the second end of the cold plate 23, and the two ends of the first reinforcing beam 21 are respectively connected to the second reinforcing beam 22, and the two ends of the second reinforcing beam 22 are respectively connected to the opposite side walls 32 of the shell 3.

[0039] In this embodiment, the setting direction is usually Figure 1 The X-axis direction is the front-to-back direction, that is, the first end and the second end of the cold plate 23 are the front end and the rear end of the cold plate 23, respectively. The first reinforcing beam 21 usually extends from the front end to the rear end of the cold plate 23, and the front end and the rear end of the first reinforcing beam 21 are respectively connected with a second reinforcing beam 22. In this way, by extending the first reinforcing beam 21 from the first end to the second end of the cold plate 23 to increase the reinforcement range of the first reinforcing beam 21, the rigidity of the cold plate 23 is further improved, and the two ends of the second reinforcing beam 22 are respectively connected to the opposite side walls 32 of the shell 3 by, for example, welding, so that the second reinforcing beam 22 and the shell 3 are connected as a whole, so as to further improve the overall structural strength of the battery box.

[0040] Furthermore, combined with Figure 1 As shown, the cold plate assembly 2 further includes a third reinforcing beam 25 , one end of which is connected to the side wall 32 of the shell 3 , and the other end of which is connected to the second reinforcing beam 22 located at the first end or the second end of the cold plate 23 .

[0041] In this embodiment, the size of the cold plate 23 is smaller than the size of the bottom wall 31 of the shell 3, that is, the rear end of the cold plate 23 abuts against the rear side wall of the shell 3, and there is a gap between the front end of the cold plate 23 and the front side wall of the shell 3. The third reinforcing beam 25 is arranged in parallel with the second reinforcing beam 22, and the second reinforcing beam 22 located at the rear end of the cold plate 23 is welded to the rear side wall of the shell 3, the second reinforcing beam 22 located at the front end of the cold plate 23 is welded to the rear end of the third reinforcing beam 25, and the front end of the third reinforcing beam 25 is welded to the front side wall of the shell 3. In this way, when the size of the cold plate 23 is smaller than the size of the bottom wall 31 of the shell 3, the third reinforcing beam 25 can be added between the cold plate 23 and the side wall 32 of the shell 3 to further improve the reliability of the connection between the cold plate assembly 2 and the shell 3, thereby further improving the overall structural strength of the battery box.

[0042] Optionally, combined Figure 4 , Figure 5 and Figure 6 As shown, the cold plate 23 includes a flat portion 231 and a bent portion 232. The flat portion 231 is arranged parallel to the bottom wall 31, and the bent portions 232 are relatively arranged at both ends of the flat portion 231, and the second reinforcing beam 22 is located between the two bent portions 232; a first connecting hole 2311 is provided on the flat portion 231, and the middle part of the second reinforcing beam 22 is connected to the flat portion 231 at the first connecting hole 2311 by a fastener, and / or a second connecting hole 2321 is provided on the bent portion 232, and both ends of the second reinforcing beam 22 are respectively connected to the corresponding bent portions 232 at the second connecting holes 2321 by fasteners.

[0043] In this embodiment, the left and right ends of the cold plate 23 are usually bent upward to form a bent portion 232, and the second reinforcing beam 22 extends from the left end to the right end of the flat portion 231. The flat portion 231 is provided with a first connection hole 2311 in the non-flow channel area around and in the middle, and / or the bent portion 232 is provided with a second connection hole 2321. During assembly, the flat portion 231 of the cold plate 23 and the second reinforcing beam 22 are riveted as a whole by passing a fastener such as a rivet through the first connection hole 2311, and / or the bent portion 232 of the cold plate 23 and the second reinforcing beam 22 are riveted as a whole by passing a fastener such as a rivet through the second connection hole 2321, so as to realize the riveting assembly between the second reinforcing beam 22 and the cold plate 23, and the connection is firm and reliable. Moreover, the provision of the bent portion 232 on the cold plate 23 can not only further improve the rigidity of the cold plate 23, but also increase the connection area between the cold plate 23 and the shell 3, and improve the reliability of the connection.

[0044] Optionally, combined Figure 4 and Figure 8As shown, the cold plate 23 includes a first flow channel plate layer 233, a second flow channel plate layer 234 and a flat plate layer 235 which are stacked in sequence. The first flow channel plate layer 233 is connected to the bottom wall 31 of the shell 3, and the first reinforcing beam 21 and the second reinforcing beam 22 are respectively connected to the flat plate layer 235.

[0045] In this embodiment, the cold plate 23 is usually a steel-aluminum composite structure, that is, the cold plate 23 is formed by stacking steel plate layers and aluminum plate layers in sequence, and the size and shape of the steel plate layers and the aluminum plate layers are the same, wherein the first flow channel plate layer 233 is a steel plate layer, and the second flow channel plate layer 234 and the flat plate layer 235 are aluminum plate layers, and the first flow channel plate layer 233, the second flow channel plate layer 234 and the flat plate layer 235 are stacked in sequence from bottom to top, and at the same time, the first flow channel plate layer 233 and the second flow channel plate layer 234 are provided with flow channels for the flow of coolant, while no flow channels are provided on the flat plate layer 235. In this way, the cold plate 23 is configured to be formed by stacking the first flow channel plate layer 233, the second flow channel plate layer 234 and the flat plate layer 235 in sequence, so that the cold plate 23 is manufactured using a steel-aluminum composite structure, so that the cold plate 23 itself has a high rigidity while realizing the cooling function by using the first flow channel plate layer 233 and the second flow channel plate layer 234.

[0046] Optionally, combined Figure 5 , Figure 6 and Figure 8 As shown, when a first connection hole 2311 is provided on the flat portion 231, the first connection hole 2311 passes through the first flow channel plate layer 233, the second flow channel plate layer 234 and the flat plate layer 235; when a second connection hole 2321 is provided on the bent portion 232, the second connection hole 2321 passes through the second flow channel plate layer 234 and the flat plate layer 235.

[0047] In this embodiment, the first connection hole 2311 on the flat part 231 passes through the entire cold plate 23, that is, the first connection hole 2311 is a through hole structure, so that the middle position of the second reinforcing beam 22 is riveted to the cold plate 23 by rivets below the flat part 231. The second connection hole 2321 on the bent part 232 only passes through the aluminum plate layer of the cold plate 23, that is, the second flow channel plate layer 234 and the flat plate layer 235, but does not pass through the steel plate layer, that is, the first flow channel plate layer 233. In other words, the second connection hole 2321 is a blind hole structure, that is, coaxially arranged through holes are opened on the two aluminum plate layers of the cold plate 23, and the through holes on the two aluminum plate layers together constitute the second connection hole 2321. In this way, it is convenient to weld the steel plate layer of the cold plate 23 to the side wall 32 of the shell 3 through the second connection hole 2321 by resistance welding, thereby avoiding welding between steel and aluminum.

[0048] Optionally, combined Figure 7 As shown, the first reinforcing beam 21 and the second reinforcing beam 22 are connected by a mortise and tenon structure.

[0049] In this embodiment, Figure 7 As shown, the second reinforcing beam 22 arranged transversely is provided with a mortise 221 with a notch facing downwards, and correspondingly, the first reinforcing beam 21 arranged longitudinally is provided with a tenon, which may be a local part in the middle of the first reinforcing beam 21, and the second reinforcing beam 22 is assembled from top to bottom to the local part in the middle of the first reinforcing beam 21, so that the tenon on the first reinforcing beam 21 is inserted into the mortise 221, so as to complete the assembly. When the middle part and both ends of the first reinforcing beam 21 are connected with a second reinforcing beam 22, the tenon and mortise structure may be arranged between the first reinforcing beam 21 and each of the second reinforcing beams 22, or the tenon and mortise structure may be arranged between the first reinforcing beam 21 and some of the second reinforcing beams 22, for example, the first reinforcing beam 21 and the second reinforcing beam 22 at the middle position are assembled by the tenon and mortise structure, and the first reinforcing beam 21 and the second reinforcing beam 22 at the two ends are welded, or the first reinforcing beam 21 and the second reinforcing beam 22 at the two ends are assembled by the tenon and mortise structure, and the first reinforcing beam 21 and the second reinforcing beam 22 at the middle position are welded. In practical applications, the design can be selected according to needs, and no specific limitation is given here. In this way, the first reinforcing beam 21 and the second reinforcing beam 22 are assembled through the mortise and tenon structure, which is not only simple and convenient to assemble, saves time, but also reduces welding and the need for welding stations.

[0050] Optionally, combined Figure 4 As shown, the battery box further includes a buffer pad 4 , which is disposed between the cold plate 23 and the bottom wall 31 of the shell 3 .

[0051] In this embodiment, the buffer pad 4 is usually fixed on the bottom wall 31 of the shell 3 by gluing, and is located between the cold plate 23 and the bottom wall 31. In this way, the buffer pad 4 can not only be used to block the heat transfer between the cold plate 23 and the bottom wall 31 of the shell 3 to play a heat insulation role, but also can be used to support the cold plate 23 and the module installed on the cold plate 23.

[0052] Optionally, combined Figure 4 As shown, the first reinforcing beam 21 , the second reinforcing beam 22 and the cold plate 23 enclose a plurality of cavities 24 , and the buffer pads 4 are arranged in one-to-one correspondence with the cavities 24 .

[0053] In this embodiment, the cavity 24 surrounded by the first reinforcing beam 21, the second reinforcing beam 22 and the cold plate 23 is used to install the battery module of the power battery, the number of the buffer pads 4 is the same as the number of the cavities 24, and the shape of the buffer pads 4 matches the shape of the cavities 4, that is, the staggered first reinforcing beams 21 and the second reinforcing beams 22 divide the flat portion 231 of the cold plate 23 into multiple areas (i.e., the parts on the flat portion 231 corresponding to the cavities 24), and the buffer pads 4 are arranged corresponding to these multiple areas. Figure 4 As shown, a first reinforcing beam 21, three second reinforcing beams 22 and a cold plate 23 enclose four rectangular cavities 24, and the buffer pad 4 is rectangular, and four are provided. At the same time, the four buffer pads 4 are respectively arranged directly below the four cavities 24. In this way, multiple buffer pads 4 are arranged according to the position and number of the cavities 24 instead of a whole buffer pad 4, so that the buffer pad 4 can avoid blocking the first connection hole 2311 in the middle area of ​​the cold plate 23, or avoid opening a through hole structure coaxially arranged with the first connection hole 2311 on the buffer pad 4, thereby improving the convenience of assembling the battery box.

[0054] Furthermore, combined with Figure 2 As shown, the battery box also includes a cooling pipeline 5, a coolant flow channel is provided on the cold plate 23, and a liquid inlet joint and a liquid outlet joint are provided on the side wall 32 of the shell 3. The liquid inlet joint and the liquid outlet joint are respectively connected to the coolant flow channel through the cooling pipeline.

[0055] In this embodiment, the cold plate 23 is a hollow plate structure, and its internal space constitutes a coolant flow channel. A liquid inlet joint and a liquid outlet joint are provided on the side wall 32 of the shell 3, and the liquid inlet joint and the liquid outlet joint are respectively connected to the coolant flow channel through cooling pipes, so as to realize the circulation of coolant in the cold plate 23, and then realize the cooling and heat dissipation of the battery module by the cold plate 23.

[0056] Another embodiment of the present invention provides a vehicle, comprising the battery box as described above.

[0057] The beneficial effects of the vehicle in this embodiment relative to the prior art are the same as those of the above-mentioned battery box, which will not be described again here.

[0058] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A battery box, characterized in that: The invention comprises a frame (1), a cold plate assembly (2) and an integrally formed shell (3), wherein the frame (1) is located in the external space of the shell (3), the cold plate assembly (2) is located in the internal space of the shell (3), the shell (3) comprises a bottom wall (31) and a side wall (32) arranged around the bottom wall (31), the frame (1) is arranged along the circumference of the shell (3) and is connected to the side wall (32) of the shell (3), and the cold plate assembly (2) is connected to the bottom wall (31) and the side wall (32) of the shell (3).

2. The battery box according to claim 1, characterized in that: The cold plate assembly (2) comprises a first reinforcing beam (21), a second reinforcing beam (22) and a cold plate (23); the cold plate (23) is connected to the bottom wall (31) and the side wall (32) of the shell (3); the first reinforcing beam (21) and the second reinforcing beam (22) are arranged alternately and are respectively connected to a side of the cold plate (23) that is away from the bottom wall (31) of the shell (3).

3. The battery box according to claim 2, characterized in that: The cold plate (23) comprises a flat portion (231) and a bent portion (232); the flat portion (231) is arranged parallel to the bottom wall (31); the bent portions (232) are arranged oppositely at two ends of the flat portion (231); the second reinforcing beam (22) is located between the two bent portions (232); a first connecting hole (2311) is provided on the flat portion (231); a middle portion of the second reinforcing beam (22) is connected to the flat portion (231) at the first connecting hole (2311) by a fastener; and / or a second connecting hole (2321) is provided on the bent portion (232); two ends of the second reinforcing beam (22) are respectively connected to the corresponding bent portion (232) at the second connecting hole (2321) by a fastener.

4. The battery box according to claim 3, characterized in that: The cold plate (23) comprises a first flow channel plate layer (233), a second flow channel plate layer (234) and a flat plate layer (235) which are stacked in sequence, the first flow channel plate layer (233) being connected to the bottom wall (31) of the shell (3), and the first reinforcing beam (21) and the second reinforcing beam (22) being respectively connected to the flat plate layer (235).

5. The battery box according to claim 4, characterized in that: When the first connection hole (2311) is provided on the flat portion (231), the first connection hole (2311) passes through the first flow channel plate layer (233), the second flow channel plate layer (234) and the flat plate layer (235); when the second connection hole (2321) is provided on the bent portion (232), the second connection hole (2321) passes through the second flow channel plate layer (234) and the flat plate layer (235).

6. The battery box according to claim 2, characterized in that: The first reinforcing beam (21) and the second reinforcing beam (22) are connected via a mortise and tenon structure.

7. The battery box according to claim 2, characterized in that: It also comprises a buffer pad (4), wherein the buffer pad (4) is arranged between the cold plate (23) and the bottom wall (31) of the shell (3).

8. The battery case according to claim 7, characterized in that: The first reinforcing beam (21), the second reinforcing beam (22) and the cold plate (23) enclose a plurality of cavities (24), and the buffer pads (4) are arranged in one-to-one correspondence with the cavities (24).

9. The battery box according to claim 1, characterized in that: A resin layer is provided on a side of the bottom wall (31) of the shell (3) facing away from the cold plate assembly (2); And / or, the frame (1) is welded to the side wall (32) of the shell (3).

10. A vehicle, characterized in that: Comprising a battery case as described in any one of claims 1-9.

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