Battery box upper cover structure, battery box and vehicle

Abstract

The utility model provides a battery box upper cover structure, a battery box and a vehicle, and relates to the technical field of batteries, the battery box upper cover structure comprises a first plate and a second plate, the first plate is a bottom plate of the vehicle, the second plate is connected to the lower side of the first plate, and a cooling flow channel is arranged between the first plate and the second plate. According to the utility model, the Z-direction space of the vehicle can be saved, the requirement for cooling the battery cell when the battery cell is inverted can be met, and the cooling capacity of the cooling liquid can be prevented from diffusing upwards into the vehicle.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, specifically, relate to a battery box upper cover structure, battery box and vehicle. BACKGROUND

[0002] The upper cover structure is an important component of the battery box, which is mainly used to form a closed space with the box body of the battery box to protect the internal battery cells. When the battery box is applied to the vehicle body, the upper cover structure is usually installed below the vehicle body floor.

[0003] In the related art, when the upper cover structure is installed below the vehicle body floor, the upper cover structure and the vehicle body floor need to occupy a certain Z-direction (i.e. vehicle height direction) space, and there may be a certain gap between the upper cover structure and the vehicle body floor, resulting in waste of the Z-direction space of the vehicle. SUMMARY

[0004] The problem solved by the utility model is how to save the Z-direction space of the vehicle.

[0005] To solve the above problems, the utility model provides a battery box upper cover structure, a battery box and a vehicle.

[0006] In the first aspect, the utility model provides a battery box upper cover structure, which comprises a first plate and a second plate, the first plate is the bottom plate of a vehicle, the second plate is connected to the lower side of the first plate, and a cooling flow channel is arranged between the first plate and the second plate.

[0007] Optionally, the upper side of the second plate is provided with a heat dissipation part protruding upward, and the heat dissipation part is located in the cooling flow channel.

[0008] Optionally, the extension direction of the projection of the heat dissipation part on the second plate is the same as the extension direction of the projection of the cooling flow channel on the second plate.

[0009] Optionally, the upper end of the heat dissipation part is spaced apart from the top wall of the cooling flow channel.

[0010] Optionally, a reinforcing layer is arranged between the first plate and the second plate, the reinforcing layer is connected to the first plate and the second plate respectively, and the lower side surface of the reinforcing layer is recessed to form the cooling flow channel.

[0011] Optionally, the upper side surface of the first plate is recessed downward to form a groove, the battery box upper cover structure is provided with a mounting hole at the groove, and the mounting hole penetrates the first plate, the reinforcing layer and the second plate in sequence.

[0012] Optionally, the reinforcing layer comprises a connected fiber composite layer, a non-connected fiber composite layer and a glue layer which are stacked from top to bottom in sequence.

[0013] Optionally, the connecting fiber composite layer and the non-connecting fiber composite layer are integrally formed with the first plate.

[0014] In a second aspect, the utility model provides a battery box, including the battery box upper cover structure as described above and the box body connected in the lower side of battery box upper cover structure, the box body and battery box upper cover structure surround the installation cavity for the installation of electric core, and the electric core is connected with battery box upper cover structure.

[0015] In a third aspect, the utility model provides a vehicle, including the battery box as described above.

[0016] The battery box upper cover structure has the advantages that: the first plate is arranged as a bottom plate of the vehicle, the battery box upper cover structure and the vehicle bottom plate are integrated, the gap between the battery box upper cover structure and the vehicle bottom plate is eliminated, and the Z-direction space of the vehicle is saved.In addition, the battery box upper cover structure can also apply the electric core inversion technology, the electric core needs to be connected to the upper cover structure when the electric core is inverted, and the electric core needs to be cooled by the upper cover structure to ensure the temperature of the electric core at this time, the second plate is connected to the lower side of the first plate, and the cooling flow channel is arranged between the first plate and the second plate, so that the cooling flow channel can cool the electric core below through the second plate, meet the cooling demand of the electric core when the electric core is inverted, and facilitate the application of the electric core inversion battery pack.In addition, the first plate (i.e., the vehicle bottom plate) is located above the cooling flow channel, and can also play a certain heat insulation effect on the cooling liquid in the cooling flow channel, prevent the cooling liquid from spreading upward to the inside of the vehicle, and indirectly improve the cooling effect of the electric core. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structure schematic view of the battery box upper cover structure of the utility model embodiment;

[0018] Figure 2 It is a top view of the battery box upper cover structure of the utility model embodiment;

[0019] Figure 3 It is Figure 2 It is a sectional view of the battery box upper cover structure along A-A line;

[0020] Figure 4 It is Figure 3 It is a partial sectional view of the battery box upper cover structure;

[0021] Figure 5 It is Figure 1 It is an enlarged schematic view of partial B of the battery box upper cover structure.

[0022] REFERENCE SIGNS:

[0023] 1. first plate; 11. groove; 12. mounting hole; 2. second plate; 21. heat dissipation part; 3. cooling flow channel; 31. top wall; 4. reinforcing layer; 41. connected fiber composite layer; 42. non-connected fiber composite layer; 43. adhesive layer. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. Although some embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms, and should not be interpreted as being limited to the embodiments described herein, on the contrary, these embodiments are provided to make the present application more thorough and complete. It should be understood that the drawings and embodiments of the present application are only for illustrative purposes, and are not intended to limit the scope of protection of the present application.

[0025] The Z-axis in the drawings represents the vertical direction, that is, the up-down position, and the positive direction of the Z-axis represents the upper side, and the negative direction of the Z-axis represents the lower side; the X-axis in the drawings represents the horizontal direction, and is designated as the front-rear position, and the positive direction of the X-axis represents the front side, and the negative direction of the X-axis represents the rear side; the Y-axis in the drawings represents the left-right position, and the positive direction of the Y-axis represents the left side, and the negative direction of the Y-axis represents the right side. It should be noted that the meanings of the aforementioned Z-axis, Y-axis and X-axis are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0026] The term "comprising" and variations thereof as used herein are open-ended, that is "including, but not limited to"; the term "based on" is "based, at least in part, on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". Related definitions of other terms will be given in the following description. It should be noted that the "first", "second", etc. concepts mentioned in the present application are only used to distinguish different devices, modules or units, and are not intended to limit the functions performed by these devices, modules or units or their mutual dependency.

[0027] It should be noted that the modification of "one" or "multiple" in the present application is illustrative and not limiting, and those skilled in the art should understand that unless otherwise explicitly stated in the context, it should be understood as "one or more".

[0028] In the related art, the battery box upper cover structure and the vehicle floor are usually separately arranged. When the battery box upper cover structure is installed to the vehicle floor, the upper cover structure and the vehicle floor need to occupy a certain Z-direction space respectively, and there may be a gap between the upper cover structure and the vehicle floor due to assembly, which further occupies the Z-direction space, so that the vehicle floor, the gap and the upper cover structure occupy a relatively large Z-direction space, thereby causing waste of the Z-direction space of the vehicle.

[0029] In view of the problems in the above related art, the utility model provides a battery box upper cover structure, a battery box and a vehicle, which can save the Z-direction space of the vehicle. The utility model will be described in detail below in combination with specific embodiments.

[0030] As shown in Figures 1 to 3 The utility model discloses a battery box upper cover structure, first board 1 and second board 2, first board 1 is the bottom plate of vehicle, second board 2 is connected in the downside of first board 1, and cooling flow channel 3 is equipped between first board 1 and second board 2.

[0031] In the embodiment, by setting the first plate 1 as the bottom plate of the vehicle, the integration of the battery box upper cover structure and the vehicle floor is realized, and the gap between the two is eliminated, thereby saving the Z-direction space of the vehicle. In addition, the battery box upper cover structure can also apply the cell inversion technology. When the cell is inverted, the cell needs to be connected to the upper cover structure. At this time, the cell needs to be cooled by the upper cover structure to ensure the temperature of the cell. In the embodiment, the second plate 2 is connected to the underside of the first plate 1, and the cooling flow channel 3 is provided between the first plate 1 and the second plate 2. Therefore, the cooling flow channel 3 can cool the cell below the second plate 2, meet the cooling demand of the cell when the cell is inverted, and facilitate the application of the cell inversion battery pack. In addition, the first plate 1 (i.e. the vehicle floor) is located above the cooling flow channel 3, which can also have a certain heat insulation effect on the cooling liquid in the cooling flow channel 3, preventing the cooling liquid from spreading upward to the vehicle interior, thereby indirectly improving the cooling effect of the cell.

[0032] Optionally, as shown in Figure 4 The upper side of the second plate 2 is provided with a heat dissipation part 21 protruding upward, and the heat dissipation part 21 is located in the cooling flow channel 3.

[0033] In the optional embodiment, since the heat dissipation part 21 extends into the cooling flow channel 3, the contact area of the second plate 2 with the cooling liquid can be increased, and the cooling effect of the cooling liquid in the cooling flow channel 3 can be more effectively transmitted to the cell below through the second plate 2, thereby improving the cooling effect.

[0034] Optionally, as shown in Figure 4As shown, the extending direction of the projection of the heat dissipation part 21 on the second plate 2 is the same as the extending direction of the projection of the cooling flow channel 3 on the second plate 2.

[0035] Specifically, the projection of the cooling flow channel 3 on the second plate 2 can extend in a serpentine shape, and correspondingly, the projection of the heat dissipation part 21 on the second plate 2 can also extend in a serpentine shape. In addition, the heat dissipation part 21 can also be located in the middle of the cooling flow channel 3 in the width direction, so as to better obtain the cold energy inside the cooling flow channel 3.

[0036] In the alternative embodiment, by making the extending direction of the projection of the heat dissipation part 21 on the second plate 2 the same as the extending direction of the projection of the cooling flow channel 3 on the second plate 2, the extending shape of the heat dissipation part 21 is substantially the same as the extending shape of the cooling flow channel 3, so as to more fully obtain the cold energy inside the cooling flow channel 3, and further improve the cooling effect on the battery cell.

[0037] Optionally, as shown in Figure 4 The upper end of the heat dissipation part 21 is spaced apart from the top wall 31 of the cooling flow channel 3.

[0038] In the alternative embodiment, by making the upper end of the heat dissipation part 21 spaced apart from the top wall 31 of the cooling flow channel 3, the heat dissipation part 21 and the top wall 31 of the cooling flow channel 3 are designed to be non-contact, which can avoid the heat dissipation part 21 directly pressing against the top wall 31 of the cooling flow channel 3 during the assembly of the second plate 2 to the first plate 1, so as to affect the assembly precision. In addition, it can also avoid the heat dissipation part 21 separating the cooling flow channel 3, so as to hinder the flow of cooling water inside the cooling flow channel 3 and affect the cooling effect.

[0039] It should be noted that, as shown in Figure 4 The heat dissipation part 21 and the second plate 2 can be an integrated structure, so as to facilitate the transfer of cold energy from the heat dissipation part 21 to the second plate 2, thereby improving the cooling effect. Further, the heat dissipation part 21 and the second plate 2 can be made of steel or aluminum alloy, so as to ensure heat conduction. In addition, the first plate 1 can also be made of steel, so as to ensure strength.

[0040] Optionally, as shown in Figure 3 and Figure 4 The first plate 1 and the second plate 2 are provided with a reinforcing layer 4, the reinforcing layer 4 is connected to the first plate 1 and the second plate 2 respectively, and the lower surface of the reinforcing layer 4 is recessed to form the cooling flow channel 3.

[0041] In the optional embodiment, the lower side of the reinforcing layer 4 is recessed to form the cooling flow channel 3, so that the reinforcing layer 4 can be used to indirectly connect the first plate 1 and the second plate 2 and fill the local area between the first plate 1 and the second plate 2 to improve the structural strength of the overall battery box upper cover structure. Moreover, the lower side surface of the reinforcing layer 4 is recessed to form the cooling flow channel 3, that is, the bottom wall of the cooling flow channel is formed by the second plate 2, so that the second plate 2 can be directly in contact with the cooling liquid, thereby improving the cooling effect of the cooling liquid on the lower battery cell through the second plate 2. On the contrary, the first plate 1 is not directly in contact with the cooling liquid, and the reinforcing layer 4 can play a heat insulation effect between the first plate 1 and the cooling liquid, thereby avoiding the upward diffusion of the cooling capacity of the cooling liquid through the first plate 1.

[0042] Optionally, as shown in Figure 3 、 Figure 4 and Figure 5 , the upper side surface of the first plate 1 is recessed downward to form a recess 11, the battery box upper cover structure is provided with a mounting hole 12 at the recess 11, and the mounting hole 12 penetrates the first plate 1, the reinforcing layer 4 and the second plate 2 in sequence.

[0043] Specifically, the diameter of the recess 11 can be greater than the diameter of the head of the bolt to be installed in the mounting hole 12, so as to ensure that the bolt head can be accommodated in the recess 11. In addition, a plurality of recesses 11 can be arranged along the edge of the upper side surface of the first plate 1, and a plurality of mounting holes 12 can be arranged one by one at the bottom of the plurality of recesses 11, so as to improve the connection strength between the battery box upper cover structure and the box body of the battery box.

[0044] In the optional embodiment, the mounting hole 12 can be provided with a bolt, and the bolt can be used to connect the battery box upper cover structure and the box body of the lower battery box. The present scheme is to additionally provide the recess 11 on the first plate 1, so that the recess 11 can accommodate the head of the bolt, thereby avoiding the excessive protrusion of the bolt head from the upper side of the first plate 1 and the occupation of the Z-direction space of the vehicle body.

[0045] It should be noted that the depth of the recess 11 can be greater than the thickness of the head of the bolt to be installed in the mounting hole 12, so as to ensure that the bolt head can be completely accommodated in the recess 11, thereby more effectively eliminating the occupation of the Z-direction space of the vehicle by the bolt.

[0046] Optionally, as shown in Figure 4 and Figure 5 , the reinforcing layer 4 comprises a connecting fiber composite layer 41, a non-connecting fiber composite layer 42 and a glue layer 43 arranged in sequence from top to bottom.

[0047] Specifically, the cooling flow channel 3 can be arranged in the non-connected fiber composite layer 42 and the adhesive layer 43 and is open to the second plate 2. It should be noted that the connected fiber composite layer 41 refers to the material of the layer, which is connected fiber composite material. The connected fiber composite material has the advantages of light weight and high strength, for example, it can be glass fiber composite material. The non-connected fiber composite layer 42 refers to the material of the layer, which is non-connected fiber composite material. The non-connected fiber composite material has the advantages of light weight, high strength, and good processing performance. For example, it can be SMC composite material. By arranging the cooling flow channel 3 in the non-connected fiber composite layer 42, the molding processing of the cooling flow is facilitated.

[0048] In the optional embodiment, the connected fiber composite layer 41 and the non-connected fiber composite layer 42 have the characteristics of light weight and high strength, which can improve the light weight of the battery box upper cover structure while ensuring the overall strength of the battery box upper cover structure. In addition, the cooling flow channel 3 can be arranged in the non-connected fiber composite layer 42, which facilitates the molding processing of the cooling flow. Moreover, the cost of the connected fiber composite layer 41 is relatively low, and the combination of the connected fiber composite layer 41 and the non-connected fiber composite layer 42 can relatively reduce the cost of the reinforcing layer 4. In addition, the adhesive layer 43 can realize the bonding of the non-connected fiber composite layer 42 and the second plate 2, thereby ensuring the sealing of the cooling flow channel 3.

[0049] Optionally, as shown in Figure 4 Figure 5 The connected fiber composite layer 41 and the non-connected fiber composite layer 42 are integrally formed with the first plate 1.

[0050] Specifically, during the production and manufacturing of the battery box upper cover structure, the first plate 1, the connected fiber composite layer 41, and the non-connected fiber composite layer 42 can be integrally formed through a mold, and then the non-connected fiber composite layer 42 is bonded to the second plate 2 through the adhesive layer 43, so as to finally complete the production and manufacturing of the battery box upper cover structure.

[0051] In the optional embodiment, by integrally forming the connected fiber composite layer 41 and the non-connected fiber composite layer 42 with the first plate 1, the connection strength of the connected fiber composite layer 41 and the non-connected fiber composite layer 42 on the first plate 1 can be ensured, thereby improving the overall structural strength of the battery box upper cover structure.

[0052] The battery box provided by the embodiment of the utility model comprises a battery box upper cover structure and a box body connected to the lower side of the battery box upper cover structure, the box body and the battery box upper cover structure enclose an installation cavity for installing a power core, and the power core is connected with the battery box upper cover structure.

[0053] Specifically, the battery box can be a power core inverted battery box. Further, the power core inverted battery box can be a box body of a CTB battery pack or a box body of a CTC battery pack.

[0054] In the embodiment, since the battery box comprises the battery box upper cover structure as described above, all the beneficial effects brought by all the embodiments of the battery box upper cover structure are possessed, and specifically, at least the following beneficial effects are possessed: by setting the first plate 1 as the bottom plate of the vehicle, the integration of the battery box upper cover structure and the vehicle bottom plate is realized, the gap between the two is eliminated, and thus the Z-direction space of the vehicle can be saved.

[0055] The vehicle provided by the embodiment of the utility model includes the battery box as described above.

[0056] In the embodiment, since the vehicle comprises the battery box as described above, all the beneficial effects brought by all the embodiments of the battery box are possessed, and here, no longer be described one by one.

[0057] Although the utility model discloses as above, the protection scope of the utility model is not limited to this only. The person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall into the protection scope of the utility model.

Claims

1. A battery case upper cover structure characterized by comprising: The application relates to a battery box upper cover structure, which comprises a first plate (1) and a second plate (2), the first plate (1) is a bottom plate of a vehicle, the second plate (2) is connected to the lower side of the first plate (1), and a cooling flow channel (3) is arranged between the first plate (1) and the second plate (2).

2. The battery pack upper cover structure according to claim 1, wherein The upper side of the second plate (2) is provided with an upwardly-protruding heat dissipation part (21), and the heat dissipation part (21) is located in the cooling flow channel (3).

3. The battery pack upper cover structure according to claim 2, characterized by, The extension direction of the projection of the heat dissipation part (21) on the second plate (2) is the same as the extension direction of the projection of the cooling flow channel (3) on the second plate (2).

4. The battery pack upper cover structure according to claim 2 or 3, characterized by, The upper end of the heat dissipation part (21) is arranged in a spaced mode with the top wall (31) of the cooling flow channel (3).

5. The battery pack upper cover structure according to claim 1, wherein The first plate (1) and the second plate (2) are provided with a reinforcing layer (4), the reinforcing layer (4) is connected to the first plate (1) and the second plate (2) respectively, and the lower side surface of the reinforcing layer (4) is recessed to form the cooling flow channel (3).

6. The battery pack upper cover structure according to claim 5, wherein The upper side surface of the first plate (1) is downwardly recessed to form a recess (11), the battery box upper cover structure is provided with a mounting hole (12) at the recess (11), and the mounting hole (12) penetrates the first plate (1), the reinforcing layer (4) and the second plate (2) in sequence.

7. The battery pack upper cover structure according to claim 5, wherein The reinforcing layer (4) comprises a connecting fiber composite layer (41), a non-connecting fiber composite layer (42) and a glue layer (43) which are sequentially stacked from top to bottom.

8. The battery pack upper cover structure according to claim 7, characterized by, The connecting fiber composite layer (41) and the non-connecting fiber composite layer (42) are integrally formed with the first plate (1).

9. A battery box characterized by The application further relates to a battery box comprising the battery box upper cover structure and a box body connected to the lower side of the battery box upper cover structure, the box body and the battery box upper cover structure form an installation cavity for installing power cores, and the power cores are connected with the battery box upper cover structure.

10. A vehicle characterized by comprising: The application further relates to a battery box comprising the battery box upper cover structure.

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