Battery pack cooling structure, battery pack and vehicle

Abstract

The utility model provides a battery pack cooling structure, battery pack and vehicle wherein the battery pack comprises an upper shell and a lower shell, the upper shell and the lower shell are buckled with each other along the first direction, a plurality of battery packs distributed along the second direction are arranged in the upper shell and the lower shell, the battery pack cooling structure comprises a plate body and a plurality of cooling fins, the plate body comprises a first end face and a second end face which are oppositely arranged in the first direction, a first coolant flow channel is formed in the plate body, and a first opening and a second opening which are communicated with the first coolant flow channel are formed in the plate body; the first connecting structure is connected with the top wall of the shell of the battery pack, and the second connecting structure is connected with the bottom wall of the shell of the battery pack, so that the plate body can be used as a supporting beam of the battery pack to support the shell. The battery cooling plate disclosed by the utility model not only has the function of cooling the battery pack, but also has the function of the supporting beam, so that the battery cooling plate has multiple functions.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, and in particular to a battery pack cooling structure, a battery pack and a vehicle. Background Art

[0002] The battery pack is a core component in new energy vehicles, wherein the battery pack includes a shell, and the shell includes an upper shell and a lower shell. Multiple battery packs are arranged in the shell, and a cold plate is arranged at the bottom of the multiple battery packs, and the cold plate is used to cool the battery packs to prevent the battery packs from high-temperature thermal runaway. Furthermore, a reinforcing beam is arranged in the shell, and the reinforcing beam is arranged between adjacent battery packs to strengthen the shell. The above-mentioned battery pack has many parts and components and is relatively costly. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects of numerous parts and high cost in the battery pack in the prior art, thereby providing a battery pack cooling structure, a battery pack and a vehicle.

[0004] In order to solve the above problems, the utility model provides a battery pack cooling structure, the battery pack includes an upper shell and a lower shell, the upper shell and the lower shell are interlocked along a first direction, a plurality of battery groups distributed along a second direction are arranged in the upper shell and the lower shell, and the battery pack cooling structure includes: a plate body, the plate body includes a first end face and a second end face arranged opposite to each other along the first direction, a first coolant flow channel is arranged in the plate body, and a first opening and a second opening connected to the first coolant flow channel are arranged on the plate body; a first connecting structure and a second connecting structure are respectively arranged on the first end face and the second end face, and the first connecting structure and the second connecting structure are respectively suitable for connecting to the upper shell and the lower shell.

[0005] Optionally, the plate body also includes a first side surface and a second side surface arranged opposite to each other along a second direction, and the battery pack cooling structure also includes a first side convexity, the first side convexity is arranged on the first side surface and / or the second side surface and extends toward the second direction, the first side convexity is arranged close to the upper shell body, so that the surface of the first side convexity facing the upper shell body and the first end face jointly form a first bearing surface, and the first connecting structure is arranged on the first bearing surface.

[0006] Optionally, a dimension of the first side protrusion extending along the second direction is greater than or equal to 1 mm.

[0007] Optionally, the plate body also includes a first side surface and a second side surface arranged opposite to each other along a second direction, and the battery pack cooling structure also includes a second side convexity, the second side convexity is arranged on the first side surface and / or the second side surface and extends toward the second direction, the first side convexity is arranged close to the upper shell body, so that the surface of the second side convexity facing the lower shell body and the second end face jointly form a second bearing surface, and the second connecting structure is arranged on the second bearing surface.

[0008] Optionally, along the first direction, the size of the second side convexity is in the range of 2 mm to 30 mm, and / or, along the second direction, the size of the second side convexity is in the range of 1 mm to 300 mm.

[0009] Optionally, the second end surface is protruding or recessed relative to the surface of the second side convex facing the lower shell.

[0010] Optionally, the length of the second end surface protruding toward the lower shell is not greater than 10 mm.

[0011] Optionally, a second coolant flow channel is provided in the second side convexity, and the second coolant flow channel is independent of the first coolant flow channel, or the second coolant flow channel is connected to the first coolant flow channel.

[0012] Optionally, the second lateral convex surface facing the upper housing contacts the bottom surface of the battery pack, and the second coolant flow channel covers at least a portion of the bottom surface of the battery pack.

[0013] Optionally, a cavity is formed in the plate body, and the battery pack cooling structure also includes a closed partition and a blocking partition. The closed partition is arranged in the cavity and divides the space in the cavity to form a first coolant flow channel. The blocking partition is arranged in the first coolant flow channel and blocks the flow path of the coolant.

[0014] Optionally, the cavity includes a first inner wall and a second inner wall distributed along a first direction, and a third inner wall and a fourth inner wall distributed along a second direction, the first inner wall is arranged close to the upper shell, the second inner wall is arranged close to the lower shell, and the distance between the first inner wall and the first end face in the first direction is greater than or equal to 2 mm, and / or the distance between the second inner wall and the second end face in the first direction is in the range of 2 mm to 20 mm.

[0015] Optionally, the plate body includes a first side surface and a second side surface that are arranged opposite to each other along the second direction, and a buffer structure is protrudingly provided on the first side surface or the second side surface along the second direction, and a buffer cavity is provided in the buffer structure.

[0016] Optionally, the first connection structure or the second connection structure includes a connection hole and a sealing member installation groove arranged around the connection hole, and the connection hole is suitable for passing a fastener.

[0017] The utility model also provides a battery pack, comprising: a shell, comprising a lower shell and an upper shell snapped together with the lower shell; a plurality of battery packs arranged in the shell along a second direction; a battery pack cooling structure, the battery pack cooling structure is the above-mentioned battery pack cooling structure, the battery pack cooling structure is arranged between adjacent battery packs, the plate body is connected to the upper shell body through a first connecting structure, and the plate body is connected to the lower shell body through a second connecting structure.

[0018] The utility model also provides a vehicle, comprising the above-mentioned battery pack cooling structure, or comprising the above-mentioned battery pack.

[0019] The utility model has the following advantages:

[0020] By utilizing the technical solution of the present utility model, the first end face and the second end face of the plate body of the battery cooling plate are respectively provided with a first connecting structure and a second connecting structure, the first connecting structure is connected to the upper shell of the battery pack, and the second connecting structure is connected to the lower shell of the battery pack, so that the plate body can serve as a support beam of the battery pack to support the shell. In addition, the coolant can enter the first coolant flow channel from the first opening, and the coolant is discharged from the second opening after flowing in the first coolant flow channel, so that the plate body can cool the battery pack, thereby reducing the temperature of the battery pack. The battery cooling plate of the present application not only has the function of cooling the battery pack, but also has the function of a support beam, so that the battery cooling plate has multiple functions. Therefore, the original support beam structure in the battery pack can be eliminated, so that the battery cooling plate is used as a support beam, reducing the components in the battery pack and reducing the cost. Therefore, the technical solution of the present utility model solves the defects of numerous components and high cost in the battery pack in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic cross-sectional view of a battery cooling plate according to a first embodiment of the present utility model is shown;

[0023] Figure 2 Shows Figure 1 Schematic diagram of the structure after the middle battery cooling plate is provided with a plugging structure;

[0024] Figure 3 Shows Figure 1 A three-dimensional schematic diagram of the battery cooling plate (top view);

[0025] Figure 4 Shows Figure 3 A schematic diagram of the structure of the first connection structure of the battery cooling plate;

[0026] Figure 5 Shows Figure 1 A three-dimensional schematic diagram of the battery cooling plate (bottom view);

[0027] Figure 6 Shows Figure 3 A schematic diagram of the structure of the second connection structure of the middle battery cooling plate;

[0028] Figure 7 Shows Figure 1 A schematic diagram of the structure of the top of the battery cooling plate;

[0029] Figure 8 Shows Figure 1 A schematic diagram of the structure of the bottom of the battery cooling plate;

[0030] Fig. 9 Shows Figure 1 Schematic diagram of the coordination between the battery cooling plate and the battery pack;

[0031] Fig.10 A schematic cross-sectional view of a battery cooling plate according to a second embodiment of the present utility model is shown;

[0032] Fig.11 A schematic diagram showing the coordination of the battery pack and the battery cooling plate of the battery pack of the utility model is shown;

[0033] Fig.12 A schematic diagram of the structure of the upper shell of the shell of the battery pack of the present invention is shown;

[0034] Fig.13 A schematic structural diagram of the lower shell of the shell of the battery pack of the present invention is shown.

[0035] Description of reference numerals:

[0036] 10. Plate body; 11. First coolant flow channel; 12. First opening; 13. Second opening; 14. First end face; 15. Second end face; 161. First side surface; 162. Second side surface; 17. First bearing surface; 18. Second bearing surface; 19. Cavity; 191. First inner wall; 192. Second inner wall; 193. Third inner wall; 194. Fourth inner wall; 195. Closed partition; 196. Blocking partition; 20. First connecting structure; 30. Second connecting structure; 40. First side convex; 50. Second side convex; 51. Second coolant flow channel; 60. Buffer structure; 61. Buffer cavity; 100. Shell; 101. Top wall; 102. Bottom wall; 103. Lower shell; 104. Upper shell; 200. Battery pack; 301. Connecting hole; 302. Sealing member mounting groove; 303. Fastener. DETAILED DESCRIPTION

[0037] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] Embodiment 1

[0042] like Figure 1 , Fig. 9 and Fig.11 As shown, the battery pack cooling structure of this embodiment is used to cool down the battery pack 200 in the battery pack. The battery pack includes a shell 100, and the shell 100 includes a lower shell 103 and an upper shell 104, which are buckled together along a first direction, and the upper shell 104 forms the top wall 101 of the shell 100, and the lower shell 103 forms the bottom wall 102 of the shell 100. A plurality of battery packs 200 are arranged in the shell 100, and the plurality of battery packs 200 are distributed along a second direction, and a battery pack cooling structure is arranged between adjacent battery packs 200, or a battery pack cooling structure is arranged on the outside of the outermost battery pack 200. Furthermore, a battery pack 200 includes a plurality of battery cells, and the plurality of battery cells are arranged in sequence along a third direction.

[0043] Combination Fig.11 It can be seen that the first direction, the second direction and the third direction are perpendicular to each other. In this embodiment, the second direction and the third direction form a horizontal plane, and the first direction is a vertical direction. Of course, the battery pack cooling structure can also be placed in other postures.

[0044] Furthermore, if Figures 1 to 6 As shown, according to the first embodiment of the battery cooling plate of the present application, the plate body 10, a first connection structure 20 and a second connection structure 30 are included. A first coolant flow channel 11 is provided in the plate body 10, and a first opening 12 and a second opening 13 communicating with the first coolant flow channel 11 are provided on the plate body 10. Along the first direction, the plate body 10 has a first end face 14 and a second end face 15, wherein the first end face 14 faces the upper shell 104, and the second end face 15 faces the lower shell 103, the first connection structure 20 is provided on the first end face 14, and the second connection structure 30 is provided on the second end face 15. The first connection structure 20 and the second connection structure 30 are respectively suitable for connecting with the upper shell 104 and the lower shell 103 of the shell 100 of the battery pack.

[0045] By using the technical solution of this embodiment, the first end face 14 and the second end face 15 of the plate body 10 of the battery cooling plate are respectively provided with a first connection structure 20 and a second connection structure 30, the first connection structure 20 is connected to the upper shell 104 of the shell 100 of the battery pack, and the second connection structure 30 is connected to the lower shell 103 of the shell 100 of the battery pack, so that the plate body 10 can serve as a support beam of the battery pack and support the shell 100. In addition, the coolant can enter the first coolant flow channel 11 from the first opening 12, and the coolant is discharged from the second opening 13 after flowing in the first coolant flow channel 11, so that the plate body 10 can cool the battery pack 200, thereby reducing the temperature of the battery pack 200. The battery cooling plate of this embodiment not only has the function of cooling the battery pack, but also has the function of a support beam, so that the battery cooling plate has multiple functions. Therefore, the original support beam structure in the battery pack can be cancelled, so that the battery cooling plate is used as a support beam, which reduces the components in the battery pack and reduces the cost. Therefore, the technical solution of this embodiment solves the defects of numerous components and high cost in the battery pack in the prior art.

[0046] like Figure 3 and Figure 5 As shown, the board body 10 of this embodiment is a long strip board structure, and is placed vertically when in use. Figure 1 , Figure 2 , Figure 3 , Figure 5 and Fig.11As shown, it extends along the third direction when in use. The plate body 10 has two side surfaces along the second direction, namely the first side surface 161 and the second side surface 162. The plate body has a top surface and a bottom surface along the first direction, namely the first end surface 14 and the second end surface 15.

[0047] Furthermore, the plate body 10 in this embodiment is provided with a first coolant flow channel 11, and the coolant can flow in the first coolant flow channel 11. Since the first side surface 161 and the second side surface 162 (or one of the first side surface 161 and the second side surface 162) of the plate body 10 are in contact with the battery pack 200, the coolant can exchange heat with the plate body 10, and the plate body 10 exchanges heat with the battery pack 200, thereby achieving the effect of cooling the battery pack 200 and performing thermal management on the battery pack 200.

[0048] Optionally, the side surface of the plate body 10 is bonded to the battery pack 200 by an adhesive.

[0049] like Figure 1 and Figure 2 As shown, the plate body 10 is further provided with a first opening 12 and a second opening 13, which may be a hole structure provided on the plate body 10. Specifically, the coolant with a relatively low temperature enters the first coolant flow channel 11 through the first opening 12, and the coolant increases in temperature after heat exchange with the battery pack 200, and the coolant with increased temperature flows out through the second opening 13, thereby realizing the circulation of the coolant and continuously cooling the battery pack 200.

[0050] Optionally, a joint structure may be provided on the first opening 12 and the second opening 13 to facilitate external piping. Figure 1 and Figure 2 It can be seen that the joint structure protrudes from the plate body 10 in the second direction.

[0051] Optionally, the coolant may be a liquid, a gas, a gas-liquid mixture, a phase-change heat exchange material, etc., as long as it can exchange heat with the plate body 10 .

[0052] like Figure 1 As shown, a cavity 19 is formed in the plate body 10, and the cavity has a first inner wall 191, a second inner wall 192, a third inner wall 193 and a fourth inner wall 194. The first inner wall 191 and the second inner wall 192 are arranged opposite to each other along a first direction. Fig.12 It can be seen that the first inner wall 191 is disposed close to the upper housing 104. Fig.13 It can be seen that the second inner wall 192 is disposed close to the lower housing 103. The third inner wall 193 and the fourth inner wall 194 are disposed opposite to each other along the second direction.

[0053] Further, a partition is provided in the cavity 19, and the partition includes a closed partition 195 and a blocking partition 196. The function of the closed partition 195 is to separate the space in the cavity 19 to form a first coolant flow channel 11, and the closed partition 195 separates the first coolant flow channel 11 into a bent form, thereby increasing the flow path of the coolant in the plate body 10 and enhancing the heat exchange effect. For example, the closed partition 195 can separate the first coolant flow channel 11 into an S-type, a C-type, etc. In this embodiment, the closed partition 195 is connected to both the third inner wall 193 and the fourth inner wall 194. The blocking partition 196 is arranged in the first coolant flow channel 11, and the coolant will contact the blocking partition 196 during the flow process, thereby increasing the contact area between the coolant and the plate body 10, thereby enhancing the heat exchange cooling effect. In this embodiment, the blocking partition 196 is arranged on the third inner wall 193 and / or the fourth inner wall 194.

[0054] Of course, in some embodiments not shown, it is also a feasible embodiment that no partition is provided in the cavity 19. In this embodiment, the space in the cavity 19 forms the first coolant flow channel 11.

[0055] like Figures 3 to 6 As shown, in this embodiment, the first end surface 14 of the plate body 10 is provided with a first connection structure 20, and the second end surface 15 is provided with a second connection structure 30. Fig.12 and Fig.13 As shown, the first connection structure 20 is connected to the top wall 101 of the battery pack shell 100, and the second connection structure 30 is connected to the bottom wall 102 of the battery pack shell 100. Since the top and bottom of the plate body 10 are connected to the top wall 101 and the bottom wall 102 of the battery pack shell 100, the plate body 10 also plays a role in supporting and reinforcing the interior of the battery pack, that is, the battery pack cooling structure can also serve as a reinforcing beam inside the battery pack. Therefore, the battery pack cooling structure in this embodiment integrates the functions of cooling the battery pack and the reinforcing beam, and the original reinforcing beams and horizontal and vertical beams do not need to be set in the battery pack, thereby simplifying the internal structure of the battery pack.

[0056] As described above, since the plate body 10 also supports and strengthens the battery pack, the plate body 10 in this embodiment needs to have a relatively high strength. Optionally, the plate body 10 in this embodiment can be made of a high-strength alloy material, such as 6061 aluminum alloy, 6005 aluminum alloy, etc., so that the plate body 10 fixes the battery pack 200 while the top and bottom of the plate body 10 are connected to the top wall 101 and the bottom wall 102 of the housing 100 of the battery pack, thereby improving the strength of the battery pack.

[0057] Of course, those skilled in the art can select the material of the plate body 10 according to actual needs, and is not limited to the above-mentioned 6061 aluminum alloy and 6005 aluminum alloy.

[0058] Furthermore, the plate body 10 in this embodiment is formed by extrusion, and the plate body 10 after extrusion is a profile with the same shape in each cross section. Those skilled in the art can select the shape of the extrusion die according to the actual cooling needs and the specific shape of the first coolant flow channel 11, and the profile after extrusion directly forms the plate body 10, the first coolant flow channel 11, and the above-mentioned closed partition 195 and blocking partition 196, so as to facilitate processing.

[0059] Those skilled in the art can understand that after the plate body 10 is extruded, both ends of the plate body 10 are open, so it is necessary to set a blocking structure at both ends of the plate body 10 to make the first coolant flow channel 11 a closed flow channel. The blocking structure can be a blocking head, a blocking plate, etc.

[0060] Since the plate body 10 in this embodiment is made of aluminum alloy, the plate body 10 is processed by metal extrusion molding process. In some embodiments not shown, the plate body 10 can also be made of non-metallic material, which can be plastic or heat-fixed plastic. In this case, the plate body 10 can be processed by non-metallic technical molding process.

[0061] Preferably, no matter the plate body 10 is made of metal or non-metal material, its thermal conductivity needs to be greater than or equal to 10 W / m·k, so as to ensure good thermal conductivity.

[0062] In some embodiments not shown, the plate body 10 may also be formed by other processes, such as casting (lost foam casting), machining, and the like.

[0063] The structures of the top and bottom of the plate body 10 are described in detail below.

[0064] like Figure 1 and Figure 7 As shown, at the top position of the plate body 10 (towards the top of the upper shell 104 along the first direction), the battery cooling plate also includes a first side convexity 40. The first side convexity 40 is arranged on the first side surface 161 and / or the second side surface 162 of the plate body 10, and extends in a direction away from the plate body 10, that is, in the second direction. And the first side convexity 40 is arranged close to the upper shell 104, so the first end surface 14 and the surface of the first side convexity 40 facing the upper shell 104 together form a first bearing surface 17, and the first connecting structure 20 is arranged on the first bearing surface 17.

[0065] Combination Figure 3 and Figure 5 It can be seen that the plate body 10 is in the shape of an elongated strip, and therefore the first side protrusion 40 is also in the shape of an elongated strip. Figure 1A cross-sectional view of the plate body 10 is shown. From the cross-sectional view of the plate body 10, the first side protrusion 40 is arranged at the top position of the side surface of the plate body 10, and the first side protrusion 40 protrudes outward from the side surface, so the first side protrusion 40 is a strip-shaped structure protruding outward as a whole.

[0066] Furthermore, the main function of the first side protrusion 40 is to increase the surface area of ​​the top of the board body 10, thereby increasing the contact area between the board body 10 and the upper shell 104 of the battery pack housing 100, which facilitates the connection between the top of the board body 10 and the upper shell 104 of the housing 100, and makes the top of the board body 10 support the upper shell 104 of the housing 100 more stably. And the first side protrusion 40 can increase the structural strength of the top of the board body 10.

[0067] like Figure 1 As shown, in the technical solution of this embodiment, two first side protrusions 40 are provided, that is, the first side surface 161 and the second side surface 162 are both provided with first side protrusions 40, and the two first side protrusions 40 are provided in mirror symmetry with respect to the plate body 10. The two first side protrusions 40 can further increase the surface area of ​​the top of the plate body 10, and further increase the structural strength of the top of the plate body 10.

[0068] In some embodiments not shown, only one first side protrusion 40 is provided, that is, the first side protrusion 40 is provided only on the first side surface 161 or the second side surface 162 of the plate body 10 , which is also a feasible embodiment.

[0069] Further, from Figure 1 It can be seen that the specific structure of the first side convex 40 includes a first surface, a second surface and a third surface which are connected to each other, the first surface faces the upper shell 104, the second surface faces the second direction, and the third surface faces the lower shell 103. Among them, the first surface of the first side convex 40 extends along the second direction and is flush with the first end surface 14 of the plate body 10. The first surface of the first side convex 40 (that is, the surface facing the upper shell 104) and the first end surface 14 of the plate body 10 jointly form a first bearing surface 17, that is, the first bearing surface 17 is a plane, and the first bearing surface 17 is in contact with the upper shell 104 of the shell 100 of the battery pack. As described above, the surface area of ​​the first bearing surface 17 can be increased by setting the first side convex 40. The second surface of the first side convex 40 extends along the second direction and is perpendicular to the first surface of the first side convex 40. The third surface of the first side convex 40 is an arc surface and is smoothly transitioned to the side surface of the plate body 10.

[0070] Of course, the angles between the first surface, the second surface and the third surface can be adaptively adjusted by those skilled in the art without being limited to the above structure.

[0071] Of course, the specific shape of the cross section of the first side convexity 40 can be adaptively adjusted by those skilled in the art, and is not limited to the above-mentioned structural form. For example, the outer contour of the cross section of the first side convexity 40 can be an arc structure.

[0072] The first connection structure 20 is disposed on the first supporting surface 17 and is used to connect the top of the plate body 10 to the top wall 101 of the housing 100 of the battery pack.

[0073] In some embodiments not shown, the first surface of the first side protrusion 40 may also be higher than the first end surface 14 of the plate body 10, or the first surface of the first side protrusion 40 may also be lower than the first end surface 14 of the plate body 10. In these two embodiments, the first bearing surface 17 is a stepped surface, the middle of which is convex or concave.

[0074] In some embodiments not shown, if the thickness of the plate body 10 (the dimension between the two side surfaces of the plate body 10) is large enough, it is also a feasible embodiment not to provide the first side protrusion 40. In this embodiment, the surface of the first end surface 14 of the plate body 10 forms the first bearing surface 17.

[0075] like Figure 1 and Figure 8 As shown, at the bottom position of the plate body 10 (along the first direction toward the bottom of the lower shell 103), the battery cooling plate also includes a second side convexity 50. The second side convexity 50 is arranged on the first side surface 161 and / or the second side surface 162 of the plate body 10, and extends in a direction away from the plate body 10, that is, in a second direction. And the second side convexity 50 is arranged close to the lower shell 103, so the surface of the second side convexity 50 facing the lower shell 103 and the second end surface 15 together form a second bearing surface 18, and the second connecting structure 30 is arranged on the second bearing surface 18.

[0076] Specifically, the second side protrusion 50 is similar in structure to the first side protrusion 40 described above, and is also a strip-shaped structure protruding from the side surface of the plate body 10. The main function of the second side protrusion 50 is to increase the surface area of ​​the bottom of the plate body 10, thereby increasing the contact area between the plate body 10 and the lower shell 103 of the shell 100 of the battery pack, which, on the one hand, facilitates the connection between the bottom of the plate body 10 and the lower shell 103 of the shell 100, and on the other hand, makes the bottom of the plate body 10 support the lower shell 103 of the shell 100 more stably. In addition, the second side protrusion 50 can increase the structural strength of the bottom of the plate body 10.

[0077] like Figure 1As shown, in the technical solution of this embodiment, two second side protrusions 50 are provided, and the two second side protrusions 50 are respectively provided on the first side surface 161 and the second side surface 162 of the plate body 10, and the two second side protrusions 50 are provided in mirror symmetry with respect to the plate body 10. The two second side protrusions 50 can further increase the surface area of ​​the bottom of the plate body 10, and further increase the structural strength of the bottom of the plate body 10.

[0078] In some embodiments not shown, only one second side protrusion 50 is provided, that is, the second side protrusion 50 is provided only on the first side surface 161 or the second side surface 162 of the plate body 10 , which is also a feasible embodiment.

[0079] Further, from Figure 1 It can be seen that the specific structure of the second side protrusion 50 also includes a first surface, a second surface and a third surface connected to each other, the first surface faces the lower shell 103, the second surface faces the second direction, and the third surface faces the upper shell 104. Among them, the first surface of the second side protrusion 50 is higher than the second end surface 15 of the plate body 10 in the first direction, the second surface of the second side protrusion 50 is vertically arranged with the first surface of the second side protrusion 50, and the third surface of the second side protrusion 50 is connected with the side surface of the plate body 10. The top surface of the second side protrusion 50 and the first surface, the second surface and the third surface are all smoothly transitionally connected.

[0080] It should be noted that the first surface of the second side protrusion 50 and the second end surface 15 of the plate body 10 form a step surface, and the middle part of the step surface protrudes toward the lower shell 103. In this structural form, a surface matching the shape of the step surface can be provided on the lower shell 103, so that the first surface of the second side protrusion 50 and the second end surface 15 are both in contact with the lower shell 103, that is, the first surface of the second side protrusion 50 and the second end surface 15 jointly form the second bearing surface 18. Alternatively, the surface of the lower shell 103 may be a plane, and only the second end surface 15 is in contact with the lower shell 103. In this case, the second side protrusion 50 plays the function of supporting the battery pack 200.

[0081] When the first surface of the second side protrusion 50 and the second end surface 15 together form the second bearing surface 18 , the surface area of ​​the second bearing surface 18 can be increased by providing the second side protrusion 50 .

[0082] Of course, the angles between the first surface, the second surface and the third surface can be adaptively adjusted by those skilled in the art, and are not limited to the above structure. For example, the cross-sectional outer contour of the second lateral protrusion 50 can be an arc structure.

[0083] Of course, the specific shape of the cross section of the second lateral protrusion 50 can be adaptively adjusted by those skilled in the art and is not limited to the above-mentioned structural form.

[0084] The second connection structure 30 is disposed on the second carrying surface 18 and is used to connect the bottom of the board body 10 with the bottom wall 102 of the housing 100 of the battery pack.

[0085] In an embodiment not shown, the surface of the first side protrusion 40 facing the lower shell 103 may also be lower than the second end surface 15 of the plate body 10 in the first direction. In this embodiment, the second bearing surface 18 is a stepped surface with a concave middle portion. Alternatively, the surface of the first side protrusion 40 facing the lower shell 103 may also be flush with the second end surface 15 of the plate body 10. In this embodiment, the second bearing surface 18 is a plane.

[0086] In some embodiments not shown, if the thickness of the plate body 10 (the dimension between the two side surfaces of the plate body 10) is large enough, it is also a feasible embodiment not to provide the second side protrusion 50. In this embodiment, the surface of the second end surface 15 of the plate body 10 forms the second bearing surface 18.

[0087] It can be seen that the structures of the top and bottom of the board body 10 are basically similar, and both include side convex structures protruding toward the second direction, thereby increasing the contact area between the top and bottom of the board body 10 and the shell 100 of the battery pack, and increasing the structural strength of the top and bottom of the board body 10.

[0088] In some embodiments not shown, those skilled in the art may also provide only the first side convexity 40 or only the second side convexity 50 according to actual needs.

[0089] Further, from Fig.11 It can be seen that after the battery cooling plate and the battery pack 200 are assembled, the first side protrusion 40 is located above the battery pack 200, and the second side protrusion 50 is located below the battery pack 200. Therefore, the surface of the second side protrusion 50 facing the upper shell 104 contacts the bottom of the battery pack 200, and the second side protrusion 50 also plays a role in supporting and positioning the battery pack 200. Since the top surface of the battery pack 200 is provided with a pole, the width of the first side protrusion 40 ( Figure 1 The dimension of the first side protrusion 40 along the second direction should not be too large, so as to prevent the first side protrusion 40 from interfering with the pole of the battery pack 200. And the bottom surface of the first side protrusion 40 does not contact the top of the battery pack 200.

[0090] As described above, since the second side convexity 50 is in contact with the bottom of the battery pack 200, a second coolant flow channel 51 is also provided in the second side convexity 50 in this embodiment. The coolant flows in the second coolant flow channel 51, thereby exchanging heat with the second side convexity 50, and the second side convexity 50 is in contact with the bottom of the battery pack 200, so the coolant can exchange heat and cool down the bottom of the battery pack 200. Therefore, in this embodiment, the battery cooling plate can cool different surfaces of the battery pack 200, realize multi-surface cooling of the battery pack 200, and have a better cooling effect.

[0091] In some embodiments not shown, the second coolant channel 51 is not provided in the second side protrusion 50 , which is also a feasible embodiment.

[0092] Optionally, the second coolant flow channel 51 and the first coolant flow channel 11 may be independent of each other, that is, the second coolant flow channel 51 introduces and leads out the coolant through a separate opening.

[0093] Optionally, the second coolant flow channel 51 and the first coolant flow channel 11 may also be interconnected. That is, when the coolant is introduced through the first opening 12, the coolant flows into the first coolant flow channel 11 and also flows into the second coolant flow channel 51, and the coolant with a higher temperature after heat exchange in the second coolant flow channel 51 may also be discharged through the second opening 13.

[0094] like Fig. 9 As shown, after the battery cooling plate is assembled, the surface of the second side protrusion 50 facing the upper shell 104 contacts the bottom surface of the battery pack 200, and the second coolant flow channel 51 covers at least part of the bottom of the battery pack 200. Those skilled in the art can adjust the width of the second side protrusion 50 according to actual needs ( Figure 1 The coverage area of ​​the second coolant flow channel 51 on the bottom of the battery pack 200 is adjusted by adjusting the dimension of the second coolant flow channel 51 along the second direction, thereby controlling the cooling intensity.

[0095] For example, those skilled in the art may adjust the width of the second side protrusion 50 so that the second coolant channel 51 covers 20%, 40%, 50% or the like of the area of ​​the bottom of the battery pack 200 .

[0096] Combination Fig. 9 Those skilled in the art will appreciate that, since battery cooling plates are provided on both sides of the battery pack 200 , when two second side protrusions 50 are provided on the plate body 10 , the widths of the two second side protrusions 50 may be the same or different, and battery cooling plates of different specifications may be provided on both sides of the battery pack 200 .

[0097] Specifically, from Fig. 9It can be seen that in the battery cooling plate on the left side of the battery pack 200, one second side protrusion 50 has a larger width, and the other second side protrusion 50 has a smaller width. In the battery cooling plate on the right side of the battery pack 200, the widths of the two second side protrusions 50 are the same. By using two battery cooling plates of different specifications in combination, the coverage area of ​​the second side protrusion 50 (second coolant flow channel 51) on the bottom of the battery pack 200 is controlled.

[0098] like Figure 7 and Figure 8 As shown, the preferred size range of the top and bottom of the plate body 10 in this embodiment is introduced below:

[0099] 1. The distance A from the top wall of the first coolant channel 11 to the first bearing surface 17 is ≥ 2 mm, that is, the dimension of the first inner wall 191 of the cavity 19 and the first end face 14 along the first direction is greater than or equal to 2 mm. Specifically, if A is too small, the top structural strength of the plate body 10 will be weak, and there is a risk of damage when subjected to force, and the installation depth provided for the fasteners is too small, which is not conducive to the connection strength. However, the value of A cannot be too large. If the value of A is too large, the volume of the first coolant channel 11 will be reduced, weakening the cooling effect. For example, A can be 2 mm, 3 mm, or 4 mm, etc.

[0100] 2. The width B of the first side protrusion 40 is ≥ 1 mm, that is, the dimension of the first side protrusion 40 extending along the second direction is greater than or equal to 1 mm. Specifically, the larger the width of the first side protrusion 40, the larger the surface area of ​​the first bearing surface 17, which is beneficial for the bottom of the plate 10 to connect and support the upper shell 104 of the shell 100 of the battery pack. However, as mentioned above, the value of B should not be too large, which may easily cause the first side protrusion 40 to interfere with the pole of the battery pack 200. For example, B can be 1 mm, 2 mm, or 3 mm, etc.

[0101] 3. The distance C from the bottom wall of the first coolant flow channel 11 to the second bearing surface 18, where 2mm≤C≤20mm, that is, the distance between the second inner wall 192 of the cavity 19 and the second end surface 15 in the first direction is in the range of 2mm to 20mm. The value of C is similar to that of A. On the premise of ensuring the strength of the bottom structure of the plate body 10, the volume of the first coolant flow channel 11 should not be reduced too much, and sufficient installation depth should be provided for the fasteners. For example, C can be 2mm, 5mm, 10mm, 15mm, 20mm, etc.

[0102] 4. The width D of the second side convexity 50, where 1mm≤D≤300mm, that is, along the second direction, the size of the second side convexity is in the range of 1mm to 300mm. As described above, the second side convexity 50 contacts the bottom of the battery pack 200 and dissipates heat from the bottom of the battery pack 200 through the second coolant flow channel 51. Therefore, those skilled in the art can adjust the value of D according to actual needs. When D is 1mm, the second side convexity 50 only contacts a very small part of the bottom of the battery pack 200. At this time, the second side convexity 50 only supports and positions the battery pack 200. When D is 200mm, the second side convexity 50 almost covers the entire bottom area of ​​the battery pack 200. At this time, the second side convexity 50 not only supports and positions the battery pack 200, but also cools the bottom of the battery pack 200. Furthermore, the D values ​​of the two second side convexities 50 of the same battery cooling plate may be the same or different. For example, D can take the values ​​of 1mm, 10mm, 50mm, 100mm, 200mm, and 300mm.

[0103] 5. The thickness E of the second side protrusion 50, wherein 2mm≤E≤30mm, that is, along the second direction, the size of the second side protrusion 50 is in the range of 2mm to 30mm. Since the second side protrusion 50 supports the bottom of the battery pack 200, the value of E cannot be too small or too large. If the value of E is too small, the supporting strength of the battery pack 200 will be insufficient, and if the value of E is too large, the vertical installation space of the battery pack 200 will be occupied. For example, the value of E can be 2mm, 10mm, 15mm, 20mm, 30mm, etc.

[0104] 6. The step height F of the second bearing surface 18 is ≤10 mm, that is, the length of the second end surface 14 protruding toward the lower shell 103 is not greater than 10 mm. For example, F can be 2 mm, 4 mm, 6 mm, 8 mm, 10 mm, etc.

[0105] Of course, those skilled in the art can adjust various size parameters of the battery cooling plate according to actual needs, without being limited to the above-mentioned size range.

[0106] like Figure 4 and Figure 6 As shown, the first connection structure 20 and the second connection structure 30 in this embodiment are basically the same, and are described in detail below:

[0107] by Figure 4 Taking the first connection structure 20 as an example, it includes a connection hole 301 and a sealing member installation groove 302 surrounding the connection hole 301, and the connection hole 301 is suitable for passing a fastener 303. The fastener 303 in this embodiment is a screw, that is, the top of the plate body 10 and the top wall 101 of the shell 100 of the battery pack are connected by screws.

[0108] Furthermore, the connecting hole 301 is a threaded hole, which is arranged on the first bearing surface 17. The sealing member installation groove 302 is an annular groove, which surrounds the outside of the connecting hole 301. A through hole is correspondingly arranged on the top wall 101 of the shell 100 of the battery pack. During assembly, the sealing ring is pressed into the sealing member installation groove 302, and after the screw is passed through the through hole of the top wall 101 of the shell 100, it is tightened to the connecting hole 301, thereby connecting the board body 10 with the shell 100. And the sealing ring is clamped between the top of the board body 10 and the top wall 101 of the shell 100, so as to achieve the sealing of the inside and outside of the shell 100.

[0109] Optionally, the connection holes 301 and the sealing member installation grooves 302 are in multiple groups and are arranged at intervals in the length direction of the first bearing surface 17 along the third direction.

[0110] like Figure 6 As shown, the second connection structure 30 is substantially the same as the first connection structure 20, and thus will not be described in detail. The difference is that since the second bearing surface 18 is a stepped surface protruding in the middle in this embodiment, the seal mounting groove 302 is not a closed structure, but is composed of two opposing arc grooves.

[0111] In some embodiments not shown, the first connection structure 20 and the second connection structure 30 may also be in other forms, such as embedded studs, glue-filled grooves, snaps, etc.

[0112] Embodiment 2

[0113] like Fig.10 As shown, the difference between the second embodiment of the battery cooling plate according to the present application and the above-mentioned first embodiment is that a buffer structure 60 is provided on the side surface of the plate body 10, the buffer structure 60 protrudes from the side surface of the plate body 10 along the second direction, and a buffer cavity 61 is provided in the buffer structure 60.

[0114] Specifically, when an external collision occurs, the buffer structure 60 can play a buffering effect, thereby reducing the deformation of the plate body 10, protecting the plate body 10, and playing a buffering effect on the battery pack 200. The buffer cavity 61 forms a cavity, and the cavity can enhance the energy absorption effect. When a collision occurs, the buffer cavity 61 deforms and collapses, thereby absorbing the impact force of the collision, further reducing the deformation and damage of the plate body 10, and also enhancing the buffering effect of the battery pack 200.

[0115] Furthermore, the buffer cavity 61 may be a hollow cavity or may be filled with a buffer material (such as buffer foam).

[0116] Furthermore, during assembly, the battery cooling plate provided with the buffer structure 60 can be arranged at the outermost side of the multiple battery packs 200, and the side surface provided with the buffer structure 60 is not in contact with the battery pack 200, that is, the buffer structure 60 is only provided on the first side surface 161 or the second side surface 162 of the plate body 10.

[0117] from Fig.10 It can be seen that in this embodiment, the cross section of the buffer cavity 61 of the buffer structure 60 is roughly a right-angle trapezoidal structure. Of course, those skilled in the art can adaptably adjust the shape of the buffer cavity 61 according to actual needs, and are not limited to Fig.10 Shape shown.

[0118] like Figures 11 to 13 As shown, the present application also provides a battery pack, and an embodiment of the battery pack according to the present application includes a shell 100, a battery pack 200 and the above-mentioned battery pack cooling structure. Wherein. The shell 100 includes a lower shell 103 and an upper shell 104 buckled on the lower shell 103, and the lower shell 103 and the upper shell 104 are buckled along a first direction. A plurality of battery packs 200 are arranged in the shell and are spaced apart along a second direction. The battery pack cooling structure is arranged between adjacent battery packs 200, or the battery pack cooling structure is arranged on the outside of the outermost battery pack 200, the board body 10 is connected to the upper shell 104 through a first connecting structure 20, and the board body 10 is connected to the lower shell 103 through a second connecting structure 30.

[0119] Specifically, the housing 100 includes a lower housing 103 and an upper housing 104 buckled on the lower housing 103, and the two enclose a closed space. Those skilled in the art can understand that the inner wall of the lower housing 103 is also the bottom wall 102 of the housing 100 of the battery pack, and the inner wall of the upper housing 104 is also the top wall 101 of the housing 100 of the battery pack.

[0120] A plurality of battery packs 200 are disposed in the housing 100. Fig.11 As shown, each battery pack 200 includes a plurality of battery cells, which are arranged closely together, and each battery cell has a first surface facing the third direction and a second surface facing the second direction. The first surfaces of adjacent battery cells are in contact with each other. The second surfaces of the battery cells of adjacent battery packs 200 are arranged opposite to each other, and there is a gap between adjacent battery packs 200, which is used to install the above-mentioned battery cooling plate.

[0121] Further, from Fig.11 It can be seen that the second surface of the battery cell of the battery pack 200 is bonded to the side surface of the battery cooling plate by an adhesive, and the bottom of the battery pack 200 is positioned and supported by the second side protrusion 50 of the battery cooling plate.

[0122] like Figure 4and Fig.12 As shown, a through hole is provided on the upper shell 104, and after the screw passes through the through hole, it is screwed into the connection hole 301 of the first connection structure 20. The sealing ring in the sealing member installation groove 302 of the first connection structure 20 ensures the sealing at the through hole.

[0123] like Figure 6 and Fig.13 As shown, a through hole is provided on the lower housing 103, and the screw passes through the through hole and is screwed into the connection hole 301 of the second connection structure 30. The sealing ring in the sealing member installation groove 302 of the second connection structure 30 ensures the sealing at the through hole.

[0124] In the embodiment, the battery cooling plate integrates the functions of cooling the battery pack 200 and supporting the shell 100 of the battery pack, so that the original horizontal and vertical beam structures are no longer required in the shell 100, which simplifies the structure of the battery pack and reduces the cost.

[0125] The present application also provides a vehicle, comprising the above-mentioned battery pack cooling structure, or comprising the above-mentioned battery pack.

[0126] Optionally, the vehicle is a new energy electric vehicle.

[0127] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A battery pack cooling structure, the battery pack comprising an upper shell (104) and a lower shell (103), the upper shell (104) and the lower shell (103) being interlocked along a first direction, a plurality of battery packs (200) distributed along a second direction being arranged in the upper shell (104) and the lower shell (103), characterized in that: The battery pack cooling structure includes: A plate body (10), the plate body (10) comprising a first end face (14) and a second end face (15) arranged opposite to each other along a first direction, a first coolant flow channel (11) being arranged in the plate body (10), and a first opening (12) and a second opening (13) being arranged on the plate body (10) and communicating with the first coolant flow channel (11); The first connecting structure (20) and the second connecting structure (30) are respectively arranged on the first end surface (14) and the second end surface (15); the first connecting structure (20) and the second connecting structure (30) are respectively suitable for connecting to the upper shell (104) and the lower shell (103).

2. The battery pack cooling structure according to claim 1, characterized in that: The plate body (10) further includes a first side surface (161) and a second side surface (162) arranged opposite to each other along the second direction, and the battery pack cooling structure further includes a first side convex (40), the first side convex (40) being arranged on the first side surface (161) and / or the second side surface (162) and extending toward the second direction, the first side convex (40) being arranged close to the upper shell (104), so that the surface of the first side convex (40) facing the upper shell (104) and the first end surface (14) together form a first bearing surface (17), and the first connecting structure (20) is arranged on the first bearing surface (17).

3. The battery pack cooling structure according to claim 2, characterized in that: The dimension of the first side protrusion (40) extending along the second direction is greater than or equal to 1 mm.

4. The battery pack cooling structure according to any one of claims 1 to 3, characterized in that: The plate body (10) further includes a first side surface (161) and a second side surface (162) arranged opposite to each other along the second direction, and the battery pack cooling structure further includes a second side convexity (50), wherein the second side convexity (50) is arranged on the first side surface (161) and / or the second side surface (162) and extends toward the second direction, and the second side convexity (50) is arranged close to the lower shell (103), so that the surface of the second side convexity (50) facing the lower shell (103) and the second end surface (15) together form a second bearing surface (18), and the second connecting structure (30) is arranged on the second bearing surface (18).

5. The battery pack cooling structure according to claim 4, characterized in that: A dimension of the second lateral convexity along the first direction is in a range of 2 mm to 30 mm, and / or a dimension of the second lateral convexity along the second direction is in a range of 1 mm to 300 mm.

6. The battery pack cooling structure according to claim 4, characterized in that: The second end surface (15) is protruding or recessed relative to the surface of the second side protrusion (50) facing the lower shell (103).

7. The battery pack cooling structure according to claim 6, characterized in that: The length of the second end surface (15) protruding toward the lower shell (103) is no more than 10 mm.

8. The battery pack cooling structure according to claim 4, characterized in that: A second coolant flow channel (51) is provided in the second side convexity (50); the second coolant flow channel (51) and the first coolant flow channel (11) are independent of each other, or the second coolant flow channel (51) and the first coolant flow channel (11) are connected to each other.

9. The battery pack cooling structure according to claim 8, characterized in that: The surface of the second side protrusion (50) facing the upper shell (104) contacts the bottom surface of the battery pack (200), and the second coolant flow channel (51) covers at least a portion of the bottom surface of the battery pack (200).

10. The battery pack cooling structure according to any one of claims 1 to 3, characterized in that: A cavity (19) is formed in the plate body (10), and the battery pack cooling structure also includes a closed partition (195) and a blocking partition (196). The closed partition (195) is arranged in the cavity (19) and separates the space in the cavity (19) to form the first coolant flow channel (11). The blocking partition (196) is arranged in the first coolant flow channel (11) and blocks the flow path of the coolant.

11. The battery pack cooling structure according to claim 10, characterized in that: The cavity (19) includes a first inner wall (191) and a second inner wall (192) distributed along the first direction, and a third inner wall (193) and a fourth inner wall (194) distributed along the second direction, the first inner wall (191) is arranged close to the upper shell (104), and the second inner wall (192) is arranged close to the lower shell (103), and the distance between the first inner wall (191) and the first end face (14) in the first direction is greater than or equal to 2 mm, and / or the distance between the second inner wall (192) and the second end face (15) in the first direction is in the range of 2 mm to 20 mm.

12. The battery pack cooling structure according to any one of claims 1 to 3, characterized in that: The plate body (10) comprises a first side surface (161) and a second side surface (162) arranged opposite to each other along a second direction; a buffer structure (60) is protrudingly provided on the first side surface (161) or the second side surface (162) along the second direction; and a buffer cavity (61) is provided in the buffer structure (60).

13. The battery pack cooling structure according to any one of claims 1 to 3, characterized in that: The first connection structure (20) or the second connection structure (30) comprises a connection hole (301) and a sealing member installation groove (302) arranged around the connection hole (301), and the connection hole (301) is suitable for passing a fastener (303).

14. A battery pack, characterized in that: include: A housing (100) comprising a lower housing (103) and an upper housing (104) buckled with the lower housing (103); A plurality of battery packs (200) are arranged in the housing (100) along the second direction; A battery pack cooling structure, wherein the battery pack cooling structure is the battery pack cooling structure according to any one of claims 1 to 13, wherein the battery pack cooling structure is arranged between adjacent battery groups (200), wherein the plate body (10) is connected to the upper shell (104) via the first connecting structure (20), and wherein the plate body (10) is connected to the lower shell (103) via the second connecting structure (30).

15. A vehicle, characterized in that: The method comprises a battery pack cooling structure as claimed in any one of claims 1 to 13, or a battery pack as claimed in claim 14.

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