Beam, tray, battery pack and electric equipment

Abstract

The embodiment of the utility model provides a beam for a tray. The main technical key point of the beam lies in the shape and the structure of the beam. The beam comprises a beam body, a cold plate switching structure is formed on one side of the beam body, and a tray cavity is formed in the other side of the beam body. The cold plate switching structure comprises an input pipeline and an output pipeline, the input pipeline is provided with a first inlet and a first outlet, the first inlet is connected with an external heat exchange medium, and the first outlet is connected with the cold plate; the output pipeline is provided with a second inlet and a second outlet, the second inlet is connected with the cold plate, and the second outlet is connected with an external heat exchange medium output pipeline. The cold plate adapter structure of the beam body and the fixing holes in the beam can be machined together, the relative position precision and consistency are high, the problem of assembly errors caused by the fact that cold plate adapter blocks are independently machined and then assembled in an existing scheme is solved, and the assembly convenience and consistency of the cold plate and the beam are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly to a beam for a battery pack tray. Background Art

[0002] In the related art, the cold plate adapter block of the existing front beam is independently pre-formed and then assembled to the front beam. The flow channels and fixing holes on the cold plate adapter block are machined in advance. This results in machining and assembly errors in the positional accuracy between the flow channel holes, fixing holes on the cold plate adapter block and the fixing holes on the front beam. Since the cold plate needs to be assembled with both the cold plate adapter block and the front beam at the same time, it ultimately leads to difficult assembly of the cold plate and poor assembly consistency. Summary of the Invention

[0003] An embodiment of the present invention provides a tray formed with a front beam of a cold plate adapter block, which solves the problems of relatively poor positional accuracy between the flow channel holes of the cold plate adapter block of the front beam of the existing battery tray and the tray rivet holes, resulting in low assembly efficiency and poor assembly consistency.

[0004] To achieve the object of the present invention, the present invention provides the following technical solutions:

[0005] According to a first aspect of the present invention, there is provided a beam for a tray, characterized in that the beam includes a beam body, the beam body is formed with a cold plate transfer structure, the cold plate transfer structure is located on one side of the beam body, and the other side of the beam body is a cavity of the tray;

[0006] The cold plate transfer structure includes an input pipe and an output pipe. The input pipe is provided with a first inlet and a first outlet, the first inlet and the first outlet are communicated, the first inlet is used for connecting with an external heat exchange medium to input the heat exchange medium from the outside, and the first outlet is used for connecting with the cold plate to input the heat exchange medium to the cold plate; the output pipe is provided with a second inlet and a second outlet, the second inlet and the second outlet are communicated, wherein the second inlet is connected with the cold plate for outputting the heat exchange medium in the cold plate, and the second outlet is used for connecting with an external heat exchange medium output pipe to output the heat exchange medium input from the second inlet.

[0007] Optionally, the input pipe is located on the side of the cold plate transfer structure away from the cavity. The input pipe is composed of a connection of a first cylinder and a second cylinder. The first cylinder and the second cylinder are hollow structures. The first cylinder is located in a second direction, the second cylinder is located in a third direction. The first cylinder is provided with a first inlet at the end away from the cavity, the second cylinder is provided with a first outlet at the end in the positive direction of the third direction. The first cylinder extends from the first inlet along the second direction and intersects and communicates with the second cylinder extending from the first outlet along the opposite direction of the third direction.

[0008] Optionally, the output pipeline is located on the side of the cold plate adapter structure away from the cavity. The output pipeline includes a third cylinder, a fourth cylinder, and a fifth cylinder. The third cylinder is located in the third direction, and a second inlet is provided at the end of the third cylinder in the positive direction of the third direction. A second outlet is provided at one end of the fifth cylinder away from the cavity. The third cylinder extends from the second inlet in the opposite direction of the third direction and intersects and communicates with the fourth cylinder. The fifth cylinder extends from the second outlet in the second direction and intersects and communicates with the fourth cylinder.

[0009] Optionally, the cold plate adapter structure is further provided with a first fixing hole and a second fixing hole. The first fixing hole and the second fixing hole are sequentially distributed along the first direction on both sides of the first outlet on the cold plate adapter structure. The first fixing hole and the second fixing hole are used to install fasteners to fasten the connection of the second inlet, the first outlet, and the cold plate.

[0010] Optionally, the beam body forms a low-voltage connection seat, and the center of the low-voltage connection seat is a through hole for connecting with a low-voltage connector.

[0011] Optionally, the beam body forms a high-voltage connection seat, and the center of the high-voltage connection seat is a through hole for connecting with a high-voltage connector.

[0012] Optionally, the beam body forms a charging connection seat, and the center of the charging connection seat is a through hole for connecting with a charging connector.

[0013] According to the second aspect of the present invention, a tray is provided. The tray includes a bottom plate and the above-mentioned beam, and the bottom plate is connected to the beam to form a cavity.

[0014] Optionally, the beam includes a beam body, a left beam, a rear beam, and a right beam, and the beam body, the left beam, the rear beam, and the right beam are sequentially spliced end to end.

[0015] According to the third aspect of the present invention, a battery pack is provided. The battery pack includes the above-mentioned tray, cold plate, and battery pack; the battery pack is assembled in the cavity of the tray, the cold plate is connected to the cold plate adapter structure of the tray beam body, and a fourth inlet is correspondingly provided at the connection between the cold plate and the cold plate adapter structure of the tray for connecting with the first outlet and communicating with the first inlet, and a third outlet is also provided for connecting with the second inlet and communicating with the second outlet.

[0016] According to the fourth aspect of the present invention, an electrical device is provided, including the above-mentioned battery pack.

[0017] The present invention provides a front beam that can be formed with a cold plate transfer structure. The flow channels, fixed holes on the cold plate transfer structure and the fixed holes on the front beam are machined together, with relatively high relative position accuracy, solving the problem of difficult assembly between the front beam and the cold plate caused by the positional deviation of the flow channels, fixed holes of the cold plate transfer block and the fixed holes of the front beam in the existing solution where the cold plate transfer block is machined with the flow channels and fixed holes separately and then assembled with the front beam, improving the assembly convenience and consistency between the cold plate and the front beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0019] Figure 1 is a schematic diagram of the front beam according to an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of the splicing tray according to an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the assembly of the splicing tray and the cold plate according to an embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of the cold plate according to an embodiment of the present invention;

[0023] Figure 5 is a schematic diagram of the lap joint between the bottom plate and the reinforcing beam according to an embodiment of the present invention;

[0024] DESCRIPTION OF THE REFERENCE NUMERALS:

[0025] First end 1, First direction 2, Charging connection seat 3, High-voltage connection seat 4, Cold plate transfer structure 5, First inlet 6, Second direction 7, Second outlet 8, Input pipeline 9, Output pipeline 10, Second end 11, Low-voltage connection seat 12, Third inlet 13, Second fixed hole 14, First outlet 15, Third direction 16, First fixed hole 17, Second inlet 18, Reinforcing beam 19, Beam body 20, Front beam 21, Second cavity 22, Third end 23, Left side beam 24, Fourth end 25, Fifth end 26, Twelfth end 27, Second connecting part 28, Left side beam 29, Lifting lug 30, Rivet nut 31, Sixth end 32, Seventh end 33, First cavity 34, Rear side beam 35, Cavity 36, Bottom plate 37, Tray 38, Beam 39, Eighth end 40, Ninth end 41, Right side beam 42, First connecting part 43, Eleventh end 44, Tenth end 45, Cold plate 46, Third outlet 47, Fourth inlet 48, Fourth outlet 49, Fourth fixed hole 50, Third fixed hole 51, Second side 52, Third side 53, Fourth side 54, First side 55, Lap joint side 56, First cylinder 57, Second cylinder 58, Third cylinder 59, Fourth cylinder 60, Fifth cylinder 61, Sixth cylinder 62. Detailed implementation mode

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time.

[0028] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the present invention in the specification are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and / or" used in the present invention includes any and all combinations of one or more of the related listed items.

[0029] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0030] In the prior art, the cold plate adapter block of the existing front beam is independently pre-formed and then assembled to the front beam. The flow channels and fixing holes on the cold plate adapter block are machined in advance, resulting in machining and assembly errors in the positional accuracy of the flow channel holes, fixing holes on the cold plate adapter block and the fixing holes on the front beam. Since the cold plate needs to be assembled to both the cold plate adapter block and the front beam at the same time, it finally leads to poor assembly of the cold plate and poor assembly consistency.

[0031] Refer to Figures 1 to 5 , the present invention provides a beam 39 for a tray 38. The beam includes a beam body 20, and the beam body 20 is formed with a cold plate adapter structure 5. The cold plate adapter structure 5 is located on one side of the beam body 20, and the other side of the beam body 20 is a tray 38 cavity 36;

[0032] The cold plate transfer structure 5 includes an input pipe 9 and an output pipe 10. The input pipe 9 is provided with a first inlet 6 and a first outlet 15. The first inlet 6 and the first outlet 15 are connected. The first inlet 6 is used to connect with an external heat exchange medium to input the heat exchange medium from the outside, and the first outlet 15 is used to connect with the cold plate 46 to input the heat exchange medium into the cold plate 46. The output pipe 10 is provided with a second inlet 18 and a second outlet 8. The second inlet 18 and the second outlet 8 are connected. Among them, the second inlet 18 is connected with the cold plate 46 and is used for outputting the heat exchange medium in the cold plate 46, and the second outlet 8 is used to connect with an external heat exchange medium output pipe to output the heat exchange medium input from the second inlet 18.

[0033] Specifically, the beam body 20 is the front beam 21. The front beam 21 is formed by integral die-casting, and the cold plate transfer structure 5 is also formed together, eliminating the assembly of the cold plate transfer structure 5 and the front beam 21 and reducing the assembly error. Then, the second inlet 18, the first fixing hole 17, the first outlet 15, the second fixing hole 14, the third inlet 13, the first inlet 6, and the second outlet 8 on the cold plate transfer structure 5 for assembling with the cold plate 46 are integrally processed, ensuring the position accuracy of the assembly holes with the cold plate 46 and improving the assembly efficiency and assembly consistency.

[0034] In one embodiment, the input pipe 9 is located on the side of the cold plate transfer structure 5 away from the cavity 36. The input pipe 9 is composed of a first cylinder 57 and a second cylinder 58 connected. The first cylinder 57 and the second cylinder 58 are hollow structures. The first cylinder 57 is located in the second direction 7, and the second cylinder 58 is located in the third direction 16. One end of the first cylinder 57 away from the cavity 36 is provided with the first inlet 6, and the end of the second cylinder 58 in the positive direction of the third direction 16 is provided with the first outlet 15. The first cylinder 57 extends from the first inlet 6 along the second direction 7 and intersects and communicates with the second cylinder 58 extending from the first outlet 15 along the opposite direction of the third direction 16.

[0035] Specifically, the input pipe 9 is machined through. The cross-section of the cylinder can be optionally circular, and the pipe size can be enlarged or reduced as needed. The included angle at the junction of the input pipe 9 in the second direction 7 and the third direction 16 can be optionally 60° < included angle ≤ 90°, preferably a right angle. The straight pipe connection has the shortest distance, which can save machining time and reduce the size of the cold plate transfer structure 5. The turning pipe structure is conducive to connecting with the input pipe of the cold plate 46.

[0036] In one embodiment, the output pipe 10 is located on the side of the cold plate adapter structure 5 away from the cavity 36. The output pipe 10 includes a third cylinder 59, a fourth cylinder 60, and a fifth cylinder 61. The third cylinder 59 is located in the third direction 16. A second inlet 18 is provided at the end of the third cylinder 59 in the positive direction of the third direction 16. A second outlet 8 is provided at one end of the fifth cylinder 61 away from the cavity 36. The third cylinder 59 extends from the second inlet 18 in the opposite direction of the third direction 16 and intersects and communicates with the fourth cylinder 60. The fifth cylinder 61 extends from the second outlet 8 in the second direction 7 and intersects and communicates with the fourth cylinder 60.

[0037] Specifically, the output pipe 10 is machined through. The cross-section of the cylinder is optionally circular, and the pipe size can be enlarged or reduced as needed. The included angle at the junction of the output pipe 10 in the opposite direction of the third direction 16 and the first direction 2 is optionally 60° < included angle ≤ 90°, preferably a right angle. The included angle at the junction of the output pipe 10 in the opposite direction of the first direction 2 and the second direction 7 is optionally 60° < included angle ≤ 90°, preferably a right angle. The inlets of the output pipe 10 are optionally the second inlet 18 and the third inlet 13, and the two are arranged in parallel in the first direction 2 of the beam body 20. The second inlet 18 is located at the end of the third cylinder 59 in the positive direction of the third direction 16. The third cylinder 59 extends from the second inlet 18 in the opposite direction of the third direction 16 and intersects and communicates with the fourth cylinder 60. The third inlet 13 is located at the end of the sixth cylinder 62 in the positive direction of the third direction 16. The sixth cylinder 62 extends from the third inlet 13 in the opposite direction of the third direction 16 and intersects and communicates with the fourth cylinder. The fifth cylinder 61 extends from the second outlet 8 in the second direction 7 and intersects and communicates with the fourth cylinder 60. This embodiment can realize the layout of the output pipe 10 within a limited structural size without interfering with the input pipe 9, improving the space utilization rate and reducing the size of the cold plate adapter structure 5. The turning pipe structure is also conducive to connecting with the output pipe of the cold plate 46.

[0038] In one embodiment, the cold plate adapter structure 5 is further provided with a first fixing hole 17 and a second fixing hole 14. The first fixing hole 17 and the second fixing hole 14 are sequentially distributed along the first direction 2 on both sides of the first outlet 15 on the cold plate adapter structure 5. The first fixing hole 17 and the second fixing hole 14 are used to install locking screws to fasten the connection of the second inlet 18, the first outlet 15, and the cold plate 46.

[0039] Specifically, the fixing holes of the cold plate adapter structure 5 are machined together with the corresponding cold plate fixing holes of the cold plate 46 using an integrated machining technology in the later stage, ensuring the position accuracy of the fixing holes of the cold plate 46 and the cold plate adapter structure 5, and improving the assembly efficiency and assembly consistency of the cold plate 46 and the cold plate adapter structure 5. The fixing holes of the cold plate adapter structure 5 and the fixing holes of the cold plate 46 are correspondingly arranged, preferably two, optionally three or four, and adjusted according to actual needs to improve the locking degree of the cold plate 46 and the cold plate adapter structure 5.

[0040] In one embodiment, a low-voltage connection seat 12 is formed on the beam body 20. The center of the low-voltage connection seat 12 is a through hole for connecting with a low-voltage connector.

[0041] Specifically, the low-voltage connection seat 12 and the beam body 20 are integrally die-cast. An assembly plane is provided on the side of the low-voltage connection seat 12 away from the cavity 36. The outer contour of the assembly plane is rectangular, and fixing holes are provided at the rectangular corners. The fixing holes are preferably provided in an even number, optionally two or four, for installing fixing screws to fixedly connect with the low-voltage connector. The integral molding eliminates the assembly link between the separate low-voltage connection seat module and the beam body 20, saves working hours and reduces the assembly precision error, and is convenient for improving the assembly efficiency and assembly consistency with the low-voltage connector.

[0042] In one embodiment, a high-voltage connection seat 4 is formed on the beam body 20. The center of the high-voltage connection seat 4 is a through hole for connecting with a high-voltage connector.

[0043] Specifically, the high-voltage connection seat 4 and the beam body 20 are integrally die-cast. An assembly plane is provided on the side of the high-voltage connection seat 4 away from the cavity 36. The outer contour of the assembly plane is rectangular, and fixing holes are provided at the rectangular corners. The fixing holes are preferably provided in an even number, optionally two or four, for installing fixing screws to fixedly connect with the high-voltage connector. The integral molding eliminates the assembly link between the separate high-voltage connection seat module and the beam body 20, saves working hours and reduces the assembly precision error, and is convenient for improving the assembly efficiency and assembly consistency with the high-voltage connector.

[0044] In one embodiment, a charging connection seat 3 is formed on the beam body 20. The center of the charging connection seat 3 is a through hole for connecting with a charging connector.

[0045] Specifically, the charging connection seat 3 and the beam body 20 are integrally die-cast. An assembly plane is provided on the side of the charging connection seat 3 away from the cavity 36. The outer contour of the assembly plane is rectangular, and fixing holes are provided at the rectangular corners. The fixing holes are preferably provided in an even number, optionally two or four, for installing fixing screws to fixedly connect with the charging connector. Optionally, the charging connector is a DC connector. The integral molding eliminates the assembly link between the separate charging connection seat module and the beam body 20, saves working hours and reduces the assembly precision error, and is also convenient for improving the assembly efficiency and assembly consistency with the charging connector.

[0046] According to another embodiment of the present application, a tray 38 is provided. The tray 38 includes a bottom plate 37 and a beam 39, and the bottom plate 37 and the beam 39 are connected to form a cavity 36.

[0047] Specifically, the bottom plate 37 is rectangular and has four sides, namely the first side 55, the second side 52, the third side 53, and the fourth side 54. The four sides of the bottom plate 37 and the beam 39 are joined by friction stir welding to form the tray cavity 36. Optionally, there are two tray cavities 36, where the first cavity 34 is used to assemble the battery module, and the second cavity 22 is used to assemble the power distribution module.

[0048] In one embodiment, the beam 39 includes a beam body 20, a left beam 29, a rear beam 35, and a right beam 42. The beam body 20, the left beam 29, the rear beam 35, and the right beam 42 are joined end to end in sequence.

[0049] Specifically, the beam body 20 is a front beam 21, and the front beam 21 is integrally die-cast. The left beam 29, the rear beam 35, and the right beam 42 are formed by aluminum extrusion, and the side beams are joined by arc welding at their ends. Optionally, the beam 39 further includes a reinforcing beam 19. The eleventh end 44 of the reinforcing beam 19 is arc-welded to the first connection portion 43 of the right beam 42, the twelfth end 27 of the reinforcing beam 19 is arc-welded to the second connection portion 28 of the left beam 29, the overlapping edge 56 of the reinforcing beam 19 is joined to the first side 55 of the bottom plate 37 by friction stir welding. The reinforcing beam 19 divides the cavity 36 of the tray 38 into the first cavity 34 and the second cavity 22, where the first cavity 34 is used to assemble the battery module, and the second cavity 22 is used to assemble the power distribution module. Optionally, the beam 39 further includes a left side beam 24. The third end 23 of the left side beam 24 is arc-welded to the second end 11 of the front beam 21, the fourth end 25 of the left side beam 24 is arc-welded to the fifth end 26 of the left beam 29. Fixing holes are provided on the left side beam 24 for installing fixing screws to fixedly connect with the cold plate 46. Lifting lugs 30 are arc-welded to the sides of the left beam 29 and the right beam 42 away from the first cavity 34, and the lifting lugs 30 facilitate lifting. A rivet nut 31 is provided on the side of the left beam 29 near the sixth end 32 and away from the first cavity 34, and the rivet nut 31 is used to fix the mudguard.

[0050] According to another embodiment of the present application, a battery pack is provided. The battery pack includes the above-mentioned tray 38, cold plate 46, and battery pack. The battery pack is assembled in the cavity 36 of the tray. The cold plate 46 is connected to the cold plate transfer structure 5 of the beam body 20 of the tray 38. A fourth inlet 48 is correspondingly provided at the connection of the cold plate 46 and the cold plate transfer structure 5 of the tray 38 for connecting with the first outlet 15 and communicating with the first inlet 6. A third outlet 47 is also provided for connecting with the second inlet 18 and communicating with the second outlet 8.

[0051] Specifically, the battery pack is assembled within the cavity 36 of the tray 38, and the cold plate 46 is assembled and covered on the tray 38. The tray 38 is provided with fixing holes at the assembly end faces of the beam 39 and the cold plate 46. Optionally, there are multiple fixing holes. The cold plate 46 is correspondingly provided with cold plate fixing holes at the assembly surface corresponding to the tray 38. Optionally, there are multiple cold plate fixing holes. The tray fixing holes and the cold plate fixing holes are arranged in one-to-one correspondence. The cold plate 46 and the tray 38 are fixed by installing fixing screws in the cold plate fixing holes and the tray fixing holes. Optionally, press rivet screws are installed for fixing.

[0052] Specifically, the cold plate 46 is provided with a fourth inlet 48 connected to the first outlet 15 of the cold plate transfer structure 5 of the beam body 20 of the tray 38. A waterproof gasket is installed and press-connected between the fourth inlet 48 and the first outlet 15. The first inlet 6, the first outlet 15, and the fourth inlet 48 are in communication. The cold plate 46 is provided with a third outlet 47 connected to the second inlet 18 of the cold plate transfer structure 5 of the beam body 20 of the tray 38. A waterproof gasket is installed and press-connected between the third outlet 47 and the second inlet 18. The third outlet 47, the second inlet 18, and the second outlet 8 are in communication. Optionally, the cold plate 46 is further provided with a fourth outlet 49, and the cold plate transfer structure 5 of the beam body 20 of the tray 38 is further provided with a third inlet 13. A waterproof gasket is installed and press-connected between the fourth outlet 49 and the third inlet 13. The fourth outlet 49, the third inlet 13, and the second outlet 8 are in communication. The cold plate 46 is provided with a third fixing hole 51 and a fourth fixing hole 50 opposite to the fixing holes of the cold plate transfer structure 5. The third fixing hole 51 is arranged corresponding to the first fixing hole 17, and the fourth fixing hole 50 is arranged corresponding to the second fixing hole 14. The cold plate 46 and the cold plate transfer structure 5 are locked by installing locking screws in the third fixing hole 51 and the first fixing hole 17 and installing locking screws in the fourth fixing hole 50 and the second fixing hole 14.

[0053] According to another embodiment of the present application, an electrical device is provided, including the above-mentioned battery pack.

[0054] Specifically, the electrical device is a new energy vehicle. Optionally, the electrical device is an energy storage device.

[0055] The present invention provides that a front beam 21 can be formed with a cold plate transfer structure 5. The flow channels and fixing holes on the cold plate transfer structure 5 are processed together with the fixing holes on the front beam 21, and the relative position accuracy is relatively high. It solves the problem of difficult assembly between the front beam and the cold plate caused by the positional deviation of the flow channels, fixing holes of the cold plate transfer block and the fixing holes of the front beam in the existing solution where the cold plate transfer block is machined with flow channels and fixing holes separately and then assembled with the front beam, and improves the assembly convenience and consistency between the cold plate and the front beam.

[0056] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0057] The above-disclosed is only a preferred embodiment of the present invention. Of course, it cannot be used to limit the scope of the rights of the present invention. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A beam for a pallet, characterized in that: The beam comprises a beam body, the beam body is formed with a cold plate transition structure, the cold plate transition structure is located on one side of the beam body, and the other side of the beam body is the cavity of the tray; The cold plate transfer structure includes an input pipeline and an output pipeline, the input pipeline is provided with a first inlet and a first outlet, the first inlet and the first outlet are communicated, the first inlet is used to connect with an external heat exchange medium to input the heat exchange medium from the outside, the first outlet is used to connect with the cold plate to input the heat exchange medium into the cold plate; the output pipeline is provided with a second inlet and a second outlet, the second inlet and the second outlet are communicated, wherein the second inlet is connected to the cold plate for outputting the heat exchange medium in the cold plate, and the second outlet is used to connect with an external heat exchange medium output pipeline to output the heat exchange medium input from the second inlet.

2. The beam according to claim 1, characterized in that The input pipeline is located on a side of the cold plate transfer structure away from the cavity, and the input pipeline is composed of a first column and a second column connected together. The first column and the second column are hollow structures. The first column is located in the second direction, and the second column is located in the third direction. The first column is provided with a first inlet at one end away from the cavity, and the second column is provided with a first outlet at the end in the positive direction of the third direction. The first column extends from the first inlet along the second direction and intersects and communicates with the second column extending from the first outlet along the opposite direction of the third direction.

3. The beam according to claim 1, characterized in that The output pipeline is located on a side of the cold plate transfer structure away from the cavity, and the output pipeline includes a third column, a fourth column, and a fifth column. The third column is located in the third direction, and a second inlet is provided at the end of the third column in the positive direction, and a second outlet is provided at an end of the fifth column away from the cavity. The third column extends from the second inlet in the opposite direction of the third direction to intersect and communicate with the fourth column, and the fifth column extends from the second outlet in the second direction to intersect and communicate with the fourth column.

4. The beam according to claim 1, characterized in that The cold plate transition structure is also provided with a first fixing hole and a second fixing hole, which are distributed in sequence along the first direction on both sides of the first outlet on the cold plate transition structure, and the first fixing hole and the second fixing hole are used to install fasteners to fasten the connection between the second inlet, the first outlet and the cold plate.

5. The beam according to claim 1, characterized in that The beam body is formed with a low-voltage connection seat, the center of the low-voltage connection seat is a through hole, and the through hole is used to connect with a low-voltage connector.

6. The beam according to claim 1, characterized in that The beam body is formed with a high-voltage connection seat, the center of the high-voltage connection seat is a through hole, and the through hole is used to connect with a high-voltage connector.

7. The beam according to claim 1, characterized in that The beam body is formed with a charging connection seat, the center of the charging connection seat is a through hole, and the through hole is used to connect with the charging connector.

8. A pallet, characterized in that: The tray comprises a bottom plate and the beam according to any one of claims 1 to 7, wherein the bottom plate is connected to the beam to form a cavity.

9. The pallet according to claim 8, characterized in that: The beam comprises a beam body, a left beam, a rear beam and a right beam, and the beam body, the left beam, the rear beam and the right beam are sequentially connected end to end and spliced.

10. A battery pack, characterized in that: The battery pack comprises the pallet, cold plate and battery pack according to any one of claims 8 to 9; the battery pack is assembled in the cavity of the pallet, the cold plate is connected to the cold plate transition structure of the pallet beam body, a fourth inlet is correspondingly provided at the connection between the cold plate and the cold plate transition structure of the pallet for connecting to the first outlet and communicating with the first inlet, and a third outlet is also provided for connecting to the second inlet and communicating with the second outlet.

11. An electrical device, characterized in that: A battery pack comprising the battery pack described in claim 10.

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