Upper cover structure, battery pack and automobile

Abstract

The present application belongs to the field of automobile technology, and in particular, relates to an upper cover structure, a battery pack and an automobile. The present application discloses an upper cover structure, including a cover plate and a cooling plate, the cooling plate including a plate surface, a convex rib portion and a concave rib portion, the convex rib portion and the concave rib portion are both connected to the plate surface and protrude from the plate surface, the convex rib portion and the concave rib portion are located on different sides of the plate surface, the concave rib portion is connected to the cover plate, a first flow channel groove is formed between the convex rib portion and the cover plate, and a second flow channel groove connected to the first flow channel groove is formed between the plate surface and the cover plate. By integrating the cover plate and the cooling plate, a first flow channel groove is formed between the convex rib portion and the cover plate, which not only realizes the function of cooling the battery module of the upper cover structure, but also reduces the weight of the upper cover structure and reduces the cost of the upper cover structure; by forming a second flow channel groove between the plate surface and the cover plate, the flow rates of the coolant in the first flow channel groove and the second flow channel groove are different, so as to realize the flow distribution of the coolant in the upper cover structure, thereby improving the heat dissipation capacity of the upper cover structure.

Description

Technical Field

[0001] The present application belongs to the field of automobile technology, and in particular relates to an upper cover structure, a battery pack and an automobile. Background Art

[0002] Power batteries are the core components of new energy vehicles, and their thermal management systems are an important guarantee for the safety and efficiency of the entire vehicle. Stable operating temperature is a necessary condition for the capacity and life of the battery. In order to maintain a reasonable battery operating temperature, a scientific and efficient battery thermal management system is necessary. Liquid cooling has high heat transfer efficiency and volume utilization, and is suitable for cooling power batteries of new energy vehicles that generate a lot of heat. Therefore, water cooling plates have become the current mainstream thermal management components.

[0003] In the existing technical solutions, in order to achieve lightweight configuration, the water cooling plate can be integrated on the upper cover, and a flow channel is formed between the ribs stamped on the water cooling plate and the upper cover to dissipate heat for the battery module. However, in this method, the liquid flow in the flow channel is fixed, and the flow distribution cannot be adjusted according to the actual distribution of the battery module, resulting in poor heat dissipation capacity. Utility Model Content

[0004] The embodiment of the present application provides a top cover structure, aiming to improve the heat dissipation capability.

[0005] An embodiment of the present application provides an upper cover structure, including a cover plate and a cooling plate, the cooling plate including a plate surface, a convex rib portion and a concave rib portion, the convex rib portion and the concave rib portion are both connected to the plate surface and protrude from the plate surface, the convex rib portion and the concave rib portion are located on different sides of the plate surface, the concave rib portion is connected to the cover plate, a first flow channel groove is formed between the convex rib portion and the cover plate, and a second flow channel groove connected to the first flow channel groove is formed between the plate surface and the cover plate.

[0006] According to an implementation of the first aspect of the present application, at least two convex rib portions and at least two concave rib portions are arranged alternately.

[0007] According to an implementation of the first aspect of the present application, the first flow channel grooves formed between at least two adjacent rib portions and the cover plate are interconnected.

[0008] According to the implementation scheme of the first aspect of the present application, the convex rib portion includes a first top portion and a first side portion, the first top portion is spaced apart from the board surface, and the first top portion is connected to the board surface or the concave rib portion through the first side portion; the concave rib portion includes a second top portion and a second side portion, the second top portion is spaced apart from the board surface, and the second top portion is connected to the board surface or the convex rib portion through the second side portion.

[0009] According to an implementation of the first aspect of the present application, the distance from the first top to the board surface is equal to the distance from the second top to the board surface.

[0010] According to an implementation of the first aspect of the present application, the cover plate includes a flat plate portion and a mounting portion that are connected to each other, and the flat plate portion is connected to the cooling plate.

[0011] According to the implementation of the first aspect of the present application, a side of the flat plate portion facing away from the cooling plate abuts against the battery module.

[0012] According to the implementation of the first aspect of the present application, a water outlet connected to the first flow channel groove is provided on the cover plate.

[0013] On the other hand, an embodiment of the present application further provides a battery pack, including a box body and an upper cover structure as described above, wherein the box body is provided with a receiving cavity for receiving a battery module, and the upper cover structure is connected to the box body.

[0014] On the other hand, an embodiment of the present application also provides a car, comprising the battery pack as above.

[0015] The upper cover structure of the embodiment of the present application includes a cover plate and a cooling plate. The cooling plate includes a plate surface and a convex rib portion and a concave rib portion both connected to the plate surface. The convex rib portion and the concave rib portion are both arranged to protrude from the plate surface. The convex rib portion and the concave rib portion are located on different sides of the plate surface. The concave rib portion is connected to the cover plate. A first flow channel is formed between the convex rib portion and the cover plate. A second flow channel connected to the first flow channel is formed between the plate surface and the cover plate. By integrating the cover plate and the cooling plate, connecting the concave rib portion to the cover plate, and forming a first flow channel between the convex rib portion and the cover plate, the upper cover structure can realize the function of cooling the battery module, reduce the weight of the upper cover structure, and reduce the cost of the upper cover structure. By forming a second flow channel between the plate surface and the cover plate, the flow rates of the coolant in the first flow channel and the second flow channel are different, so that the flow distribution of the coolant in the upper cover structure is realized, thereby improving the heat dissipation capacity of the upper cover structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 A schematic diagram of the structure of the upper cover structure of some embodiments of the present application;

[0018] Figure 2 An example is shown Figure 1 Schematic diagram of the exploded structure of the middle and upper cover structure;

[0019] Figure 3 A partial enlarged cross-sectional view showing an example of a cover plate and a cooling plate;

[0020] Figure 4 A partial enlarged cross-sectional view showing another example of a cover plate and a cooling plate;

[0021] Figure 5 An example is shown Figure 1 Cross-sectional view of the middle upper cover structure.

[0022] Reference numerals:

[0023] 10. Upper cover structure;

[0024] 100, cover plate; 110, water inlet; 120, flat plate portion; 130, mounting portion;

[0025] 200, cooling plate; 210, plate surface; 220, convex rib portion; 221, first top portion; 222, first side portion; 230, concave rib portion; 231, second top portion; 232, second side portion;

[0026] 300, first flow channel groove;

[0027] 400. Second flow channel groove. DETAILED DESCRIPTION

[0028] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0030] The applicant found that in the prior art, in order to achieve lightweight configuration, a water cooling plate can be integrated on the upper cover, and a flow channel can be formed between the ribs stamped on the water cooling plate and the upper cover to dissipate heat for the battery module. However, in this method, the liquid flow in the flow channel is fixed, and the flow distribution cannot be adjusted according to the actual distribution of the battery module, resulting in poor heat dissipation capacity.

[0031] In view of the above problems, the applicant proposed an upper cover structure, including a cover plate and a cooling plate, the cooling plate including a plate surface and a convex rib portion and a concave rib portion both connected to the plate surface, the convex rib portion and the concave rib portion both protrude out of the plate surface, the convex rib portion and the concave rib portion are located on different sides of the plate surface, the concave rib portion is connected to the cover plate, a first flow channel groove is formed between the convex rib portion and the cover plate, and a second flow channel groove connected to the first flow channel groove is formed between the plate surface and the cover plate.

[0032] The upper cover structure provided in the present application integrates the cover plate and the cooling plate, connects the concave rib portion to the cover plate, and forms a first flow channel groove between the convex rib portion and the cover plate, thereby realizing the function of the upper cover structure to cool the battery module and reducing the weight and cost of the upper cover structure. By forming a second flow channel groove between the plate surface and the cover plate, the flow rates of the coolant in the first flow channel groove and the second flow channel groove are different, thereby realizing the flow distribution of the coolant in the upper cover structure, thereby improving the heat dissipation capacity of the upper cover structure.

[0033] In order to solve the problems of the prior art, the embodiment of the present application provides an upper cover structure. The upper cover structure provided by the embodiment of the present application is introduced below. It should be noted that in the accompanying drawings, for the convenience of drawing, the dimensions in the drawings are not necessarily proportional to the actual dimensions.

[0034] Please refer to Figures 1 to 3 , Figure 1 A schematic diagram of the structure of the upper cover structure of some embodiments of the present application; Figure 2 An example is shown Figure 1 Schematic diagram of the exploded structure of the middle and upper cover structure; Figure 3 An enlarged partial cross-sectional view of an example cover plate and cooling plate is shown.

[0035] like Figures 1 to 3 As shown, the present application provides an upper cover structure 10, which is used to cool a battery module (not shown). The battery module 10 includes a cover plate 100 and a cooling plate 200, the cooling plate 200 includes a plate surface 210, a convex rib portion 220 and a concave rib portion 230, the convex rib portion 220 and the concave rib portion 230 are both connected to the plate surface 210 and protrude from the plate surface 210, the convex rib portion 220 and the concave rib portion 230 are located on different sides of the plate surface 210, the concave rib portion 230 is connected to the cover plate 100, a first flow channel 300 is formed between the convex rib portion 220 and the cover plate 100, and a second flow channel 400 connected to the first flow channel 300 is formed between the plate surface 210 and the cover plate 100.

[0036] Optionally, the cover plate 100 and the cooling plate 200 are both metal parts, and the convex ribs 220 and the concave ribs 230 on the cooling plate 200 are both formed by stamping. The concave ribs 230 and the convex ribs 220 refer to the ribs protruding from the front and back sides of the plate surface 210, respectively. The concave ribs 230 and the convex ribs 220 are both connected to the plate surface 210, which may refer to the concave ribs 230 and the convex ribs 220 being directly connected to the plate surface 210, or the convex ribs 220 and the concave ribs 230 are connected to the plate surface 210 through other concave ribs 230 and the convex ribs 220.

[0037] Optionally, the first flow channel groove 300 is filled with flowing coolant, and the coolant takes away the heat generated by the battery module in the accommodating cavity during the flow process, thereby achieving the function of dissipating heat for the battery module.

[0038] Optionally, the concave rib portion 230 and the cover plate 100 may be connected by bolt connection, riveting, gluing, welding, etc. Necessary sealing measures may be added between the cooling plate 200 and the cover plate 100, including but not limited to sealant, etc.

[0039] Optionally, the plate surface 210, two adjacent concave rib portions 230 and the cover plate 100 together form a second flow channel 400.

[0040] Optionally, the second flow channel 400 is connected to the first flow channel 300, which means that the second flow channel 400 can be directly connected to the first flow channel 300, or the second flow channel 400 can be connected to the first flow channel 300 through other second flow channel 400.

[0041] Optionally, since the convex rib portion 220 and the concave rib portion 230 are located on different sides of the plate surface 210, the cross-sectional area of ​​the first flow channel 300 directly formed by the convex rib portion 220 and the cover plate 100 is greater than the cross-sectional area of ​​the second flow channel 400 formed between the plate surface 210 and the cover plate 100. That is, the flow rate of the coolant in the first flow channel 300 is greater than the flow rate of the coolant in the second flow channel 400. The first flow channel 300 can be used as a main flow channel, and the second flow channel 400 can be used as a branch flow channel. Multiple branch flow channels are connected to the same main flow channel, and the coolant in the main flow channel is divided into multiple branch flow channels, so that the flow distribution of the coolant in the upper cover structure 10 can be achieved.

[0042] Optionally, in any direction, there is no restriction on the arrangement of the convex rib portion 220, the concave rib portion 230 and the plate surface 210. For example, the convex rib portion 220, the concave rib portion 230, and the convex rib portion 220 are arranged in sequence, or the convex rib portion 220, the concave rib portion 230, the plate surface 210, the concave rib portion 230, and the convex rib portion 220 are arranged in sequence.

[0043] The upper cover structure provided in this embodiment includes a cover plate 100 and a cooling plate 200. The cooling plate 200 includes a plate surface 210 and a convex rib portion 220 and a concave rib portion 230 both connected to the plate surface 210. The convex rib portion 220 and the concave rib portion 230 are both arranged to protrude from the plate surface 210. The convex rib portion 220 and the concave rib portion 230 are located on different sides of the plate surface 210. The concave rib portion 230 is connected to the cover plate 100. A first flow channel 300 is formed between the convex rib portion 220 and the cover plate 100. A second flow channel 400 connected to the first flow channel 300 is formed between the plate surface 210 and the cover plate 100. By integrating the cover plate and the cooling plate 200, the concave rib portion 230 is connected to the cover plate 100, and the first flow channel 300 is formed between the convex rib portion 220 and the cover plate 100, the upper cover structure 10 can cool the battery module, and the weight and cost of the upper cover structure 10 can be reduced. By forming the second flow channel 400 between the plate surface 210 and the cover plate 100, the flow rates of the coolant in the first flow channel 300 and the second flow channel 400 are different, so that the flow distribution of the coolant in the upper cover structure 10 is achieved, thereby improving the heat dissipation capacity of the upper cover structure 10.

[0044] Please refer to Figure 4 , Figure 4 A partial enlarged cross-sectional view showing another example of a cover plate and a cooling plate.

[0045] like Figure 4 As shown, in some optional embodiments, at least two convex rib portions 220 and at least two concave rib portions 230 are arranged alternately.

[0046] Optionally, the first flow channel groove 300 formed between at least two adjacent rib portions and the cover plate 100 is communicated with each other.

[0047] Optionally, at least part of the first flow channel grooves 300 are connected end to end to form an S-shape. The orthographic projection of each battery module on the cover plate 100 partially overlaps with the orthographic projection of the first flow channel grooves 300 on the cover plate 100 .

[0048] The upper cover structure 10 provided in this embodiment arranges multiple convex ribs 220 and multiple concave ribs 230 alternately so that the first flow channel grooves 300 are connected end to end to form an S shape, thereby providing heat dissipation for each battery module arranged in the array, thereby improving the heat dissipation capacity of the upper cover structure 10.

[0049] In some optional embodiments, the convex rib portion 220 includes a first top portion 221 and a first side portion 222, the first top portion 221 is spaced apart from the board surface 210, and the first top portion 221 is connected to the board surface 210 or the concave rib portion 230 via the first side portion 222. The concave rib portion 230 includes a second top portion 231 and a second side portion 232, the second top portion 231 is spaced apart from the board surface 210, and the second top portion 231 is connected to the board surface 210 or the convex rib portion 220 via the second side portion 232.

[0050] Optionally, the distance from the first top 221 to the board surface 210 is equal to the distance from the second top 231 to the board surface 210 .

[0051] The upper cover structure 10 provided in this embodiment reduces the process difficulty of stamping the cooling plate 200 by making the distance from the first top 221 to the plate surface 210 equal to the distance from the second top 231 to the plate surface 210 .

[0052] Please refer to Figure 2 and Figure 5 , Figure 5 An example is shown Figure 1 Cross-sectional view of the middle upper cover structure.

[0053] like Figure 2 and Figure 5 As shown, in some optional embodiments, the cover plate 100 is provided with a water port 110 which is connected to the first flow channel groove 300 .

[0054] Optionally, the water inlet 110 includes a water inlet and a water outlet, and the coolant flows into the first flow channel 300 through the water inlet, and then flows into multiple second flow channels 400 respectively, and then merges into another first flow channel 300 and flows out through the water outlet.

[0055] In some optional embodiments, the cover plate 100 includes a flat plate portion 120 and a mounting portion 130 connected to each other, and the flat plate portion 120 is connected to the cooling plate 200 .

[0056] Optionally, the flat plate portion 120 is a flat surface, and a side of the flat plate portion 120 facing away from the cooling plate 200 abuts against the battery module. The mounting portion 130 is used to connect with an external component.

[0057] The upper cover structure 10 provided in this embodiment can increase the contact area by abutting the flat plate portion 120 against the battery module, thereby achieving better heat exchange of the upper cover structure 10, and when the battery module thermal runaway causes the cover plate 100 to rupture, the coolant in the flow channel groove will spray out to cool down and extinguish the battery module, thereby suppressing further heat spread of the battery module.

[0058] The embodiment of the second aspect of the present application also provides a battery pack, including a box body (not shown) and an upper cover structure as above, wherein the box body is provided with a receiving cavity (not shown) for receiving a battery module, and the upper cover structure 10 is used to seal the receiving cavity. The box body is connected to the mounting portion 130. Since the battery pack provided by the embodiment of the second aspect of the present application includes the upper cover structure of any of the above-mentioned embodiments of the first aspect, the battery pack provided by the embodiment of the second aspect of the present application has the beneficial effects of the upper cover structure 10 of any of the above-mentioned embodiments of the first aspect, which will not be repeated here.

[0059] The third aspect of the present application also provides a car, including the battery pack as described above. Since the car provided by the third aspect of the present application includes the upper cover structure 10 of any of the first aspect embodiments, the car provided by the third aspect of the present application has the beneficial effects of the upper cover structure 10 of any of the first aspect embodiments, which will not be described in detail here.

[0060] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A cover structure, characterized in that: include: A cover plate and a cooling plate, the cooling plate comprising a plate surface, a convex rib portion and a concave rib portion, the convex rib portion and the concave rib portion are both connected to the plate surface and protrude from the plate surface, the convex rib portion and the concave rib portion are located on different sides of the plate surface, the concave rib portion is connected to the cover plate, a first flow channel is formed between the convex rib portion and the cover plate, and a second flow channel connected to the first flow channel is formed between the plate surface and the cover plate.

2. The upper cover structure according to claim 1, characterized in that: At least two of the convex rib portions and at least two of the concave rib portions are arranged alternately.

3. The upper cover structure according to claim 2, characterized in that: At least two adjacent rib portions are connected to the first flow channel groove formed between the cover plate.

4. The upper cover structure according to claim 1, characterized in that: The convex rib portion includes a first top portion and a first side portion, the first top portion is spaced apart from the board surface, and the first top portion is connected to the board surface or the concave rib portion through the first side portion; The concave rib portion includes a second top portion and a second side portion, the second top portion is spaced apart from the board surface, and the second top portion is connected to the board surface or the convex rib portion through the second side portion.

5. The upper cover structure according to claim 4, characterized in that: The distance from the first top to the board surface is equal to the distance from the second top to the board surface.

6. The upper cover structure according to claim 1, characterized in that: The cover plate includes a flat plate portion and a mounting portion connected to each other, and the flat plate portion is connected to the cooling plate.

7. The upper cover structure according to claim 6, characterized in that: Used to cool the battery module, the side of the flat plate portion facing away from the cooling plate abuts against the battery module.

8. The upper cover structure according to claim 1, characterized in that: The cover plate is provided with a water port connected with the first flow channel groove.

9. A battery pack, characterized in that: It comprises a box body and an upper cover structure as claimed in any one of claims 1 to 8, wherein a receiving cavity for receiving a battery module is provided inside the box body, and the upper cover structure is connected to the box body.

10. An automobile, characterized in that: Comprising the battery pack as claimed in claim 9.

Images