Battery box cover, battery and vehicle

Abstract

The present application relates to the field of batteries, and provides a battery box cover, a battery, and a vehicle. The battery box cover includes a cover plate and a cooling plate disposed on the cover plate, the cooling plate having a cooling surface, the cooling surface being exposed from the inner surface of the cover plate, the battery box cover is used to cover the box body of the battery box, the cooling surface being exposed from the inner surface of the cover plate, so that when the battery box cover is covered on the box body, the cooling surface can contact with the battery cell to cool it down. The battery box cover integrates the cooling plate on the cover plate, and cools the battery cell through the cooling plate, thereby reducing the number of fixing components used to install the cooling plate in the battery box, reducing the space occupied by the fixing components, thereby reducing the weight of the battery and improving the energy density of the battery.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery box cover, a battery and a vehicle. Background Art

[0002] For new energy vehicle batteries, lightweighting and heat dissipation have always been the research directions of battery professionals. The battery cells in the battery box release heat during the charging and discharging process, causing the battery to heat up. In order to dissipate heat and cool the battery, the current battery thermal management solution relies on multi-sided heat dissipation of the battery cells. Multi-sided heat dissipation requires many liquid cooling plates. In related technologies, liquid cooling plates are installed in the battery box through fixed components. For example, the liquid cooling plate is installed in the battery box through a bracket or fastener. The fixed components occupy the internal space of the battery box, resulting in a decrease in the energy density of the battery pack, and also an increase in the weight of the entire battery. Utility Model Content

[0003] The present application provides a battery box cover, a battery and a vehicle. The battery box cover can reduce the number of fixing components used to install a liquid cooling plate, thereby reducing the weight of the battery and improving the energy density of the battery.

[0004] On the one hand, the present application provides a battery box cover, including a cover plate and a cooling plate arranged on the cover plate, the cooling plate has a cooling surface, and the cooling surface is exposed on the inner surface of the cover plate.

[0005] In some embodiments, the cooling plate is at least partially embedded in the cover plate, and the cooling surface protrudes from the inner surface of the cover plate.

[0006] In some embodiments, the cooling surface is connected to a flexible thermally conductive pad, which is a thermally conductive gasket with deformation capability, and the flexible thermally conductive pad is bonded to the cooling surface.

[0007] In some embodiments, the inner surface of the cover plate is raised in a direction away from its outer surface to form a convex portion, and the convex top surface of the convex portion is arranged to protrude from the cooling surface in a direction away from the outer surface of the cover plate, and the convex portion is used to abut against a portion of the top cover of the battery cell.

[0008] In some embodiments, a portion of the outer surface of the cover plate is recessed along the thickness direction of the cover plate toward the inner surface of the cover plate to form a groove, and the groove overlaps with a projection of the convex portion on the cover plate.

[0009] In some embodiments, a plurality of cooling plates are provided, and the plurality of cooling plates are spaced apart and distributed along the length direction of the cover plate.

[0010] In some embodiments, a protrusion is provided between two adjacent cooling plates, the cooling plate has a cooling channel for fluid flow, the extension direction of the cooling channel intersects with the length direction of the cover plate, and the protrusion extends along the extension direction of the cooling channel.

[0011] In some embodiments, the convex top surface of the convex portion has a bonding portion.

[0012] In another aspect, the present application provides a battery, comprising:

[0013] A battery box, comprising a box body and a battery box cover, wherein the battery box cover is covered on the box body;

[0014] There are multiple battery cells, which are located in the battery box. A pole is provided on the top cover of each battery cell. The poles of two adjacent battery cells are connected by a jumper structure, and the jumper structure is connected to the cooling surface.

[0015] On the other hand, the present application provides a vehicle, comprising the battery described above.

[0016] The battery box cover, battery and vehicle provided by the embodiment of the present application, wherein the battery box cover is integrated with the cover plate through a cooling plate, and the battery cells are cooled by the cooling plate, and the cooling surface of the cooling plate is exposed to the cover plate, so that when the battery box cover is closed on the battery box, the cooling surface can contact the battery cells in the battery box to cool them down. The cooling plate is directly integrated with the cover plate, which reduces the number of fixing components for installing the cooling plate in the battery box, thereby reducing the weight of the battery, and also reduces the space occupied by the fixing components in the battery box, thereby improving the energy density of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the structure of a battery box cover provided in an embodiment of the present application;

[0019] Figure 2 for Figure 1 Exploded diagram of

[0020] Figure 3 A structural stereogram of a battery provided in an embodiment of the present application;

[0021] Figure 4 A schematic diagram of the structure of a battery provided in an embodiment of the present application.

[0022] Description of Figure Numbers:

[0023] 1. Cover plate; 11. Outer surface; 12. Inner surface; 13. Protrusion; 14. Groove;

[0024] 2. cooling plate; 21. embedded end surface; 22. cooling surface;

[0025] 3. Battery cell; 31. Top cover; 32. Terminal column; 4. Jumper structure. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0028] A plurality of battery cells 3 are arranged in the battery box, Figure 3 and Figure 4 Each battery cell 3 has a pole 32 on its top cover 31, and the poles 32 of two adjacent battery cells 3 are connected by a crossover structure 4. The battery box includes a box body and a battery box cover, and the battery box cover is covered on the box body. The battery box protects the battery components inside the box.

[0029] like Figures 1 to 4 As shown, the embodiment of the present application provides a battery box cover, including a cover plate 1 and a cooling plate 2 arranged on the cover plate 1, the cooling plate 2 has a cooling surface 22, and the cooling surface 22 is exposed on the inner surface 12 of the cover plate 1, as shown in FIG. Figure 3 As shown, the battery box cover is used to cover the battery box body, and the cooling surface 22 is exposed on the inner surface 12 of the cover plate 1, so that when the battery box cover is closed on the box body, the cooling surface 22 can be in contact and connected with the jumper structure 4 to cool the pole 32 through the jumper structure 4.

[0030] The battery box cover provided in the embodiment of the present application integrates a cooling plate 2 and cools the battery cell 3 through the cooling plate 2. By exposing the cooling surface of the cooling plate to the cover plate, the cooling surface of the battery box cover can contact the battery cell in the battery box to cool it down when the battery box cover is closed on the battery box. The number of fixing components used to install the cooling plate 2 in the battery box is reduced, thereby reducing the weight of the battery and reducing the space occupied by the fixing components in the battery box, thereby improving the energy density of the battery.

[0031] In some possible embodiments, Figure 1 and Figure 2 As shown, the cooling plate 2 is at least partially embedded in the cover plate 1, and the cooling surface 22 is protruding from the inner surface 12 of the cover plate 1. The cooling plate 2 is a metal plate with a certain thickness to provide a cooling channel for the circulation of the coolant. The cooling plate 2 is partially embedded in the cover plate 1, and the embedded end surface 21 of the cooling plate 2 is located in the cover plate 1 to avoid the cooling plate 2 occupying a large space in the battery box and affecting the energy density of the battery. The cooling plate 2 is partially embedded in the cover plate 1 so that it is firmly connected to the cover plate 1. The cooling surface 22 protrudes from the inner surface 12 of the cover plate 1, which is convenient for docking it with the cross-connection structure 4. In specific implementation, the cover plate 1 and the cooling plate 2 can be integrally formed by inlay injection molding.

[0032] At the same time, the cover plate 1 is generally a composite plate, and the cooling plate 2 is a metal plate with a certain strength. After the cooling plate 2 is embedded in the cover plate 1, the rigidity of the cover plate 1 is improved. When the battery box cover is in use, the deformation resistance is increased, so its flatness is easy to maintain.

[0033] Considering that when the bridging structure 4 abuts against the cooling surface 22, the connection surface between the bridging structure 4 and the cooling surface 22 may not be completely fitted, the cooling surface 22 may be connected to the bridging structure 4 via a flexible thermal pad. The flexible thermal pad is connected to the cooling surface 22, and the flexible thermal pad is a flexible structure with electrical conductivity and deformation capability, such as a thermally conductive silicone pad.

[0034] In the related art, a composite strip is inserted into the space between the top cover 31 of the battery cell 3 and the battery box cover to limit the position of the battery cell 3 and prevent it from deviating and shaking.

[0035] In some embodiments, the inner surface 12 of the cover plate 1 is convexly formed with a convex portion 13 in a direction away from the outer surface 11 thereof, and the convex top surface of the convex portion 13 is arranged to protrude from the cooling surface 22 in a direction away from the outer surface 11 of the cover plate 1, and the convex portion 13 is used to abut against a part of the top cover 31 of the battery cell 3. After the battery box cover is closed on the box body, the convex portion 13 can limit the battery cell 3 to prevent it from deviating and shaking, and the installation of inserting the composite material strip is omitted, saving time and effort.

[0036] Further, such as Figure 1 and Figure 2 As shown, the outer surface 11 of the cover plate 1 is partially recessed along the thickness direction of the cover plate 1 toward the inner surface 12 of the cover plate 1 to form a groove 14, and the groove 14 overlaps with the projection of the convex portion 13 on the cover plate 1. The groove 14 is further arranged at the position of the convex portion 13 of the cover body. After ensuring that the thickness between the bottom wall of the groove 14 and the convex top surface of the convex portion 13 meets the use strength, the arrangement of the groove 14 effectively reduces the weight of the battery box cover, thereby reducing the weight of the entire battery box.

[0037] In some embodiments, a plurality of cooling plates 2 are provided, and the plurality of cooling plates 2 are spaced apart along the length direction of the cover plate 1. The cooling plates 2 are mainly used to cool the poles 32 of the battery cells 3 through the cross-connection structure 4. After the battery box cover is closed on the box body, the cooling plates 2 are no longer arranged at the positions not corresponding to the poles 32, which can reduce weight and cost at the same time.

[0038] Considering the arrangement of multiple battery cells 3 in the battery box, in some embodiments, a convex portion 13 is provided between two adjacent cooling plates 2, and the cooling plate 2 has a cooling channel for fluid flow, and the extension direction of the cooling channel is arranged to intersect with the length direction of the cover plate 1, and the convex portion 13 extends along the extension direction of the cooling channel. The coolant flows along the extension direction of the cooling channel to cool the multiple battery cells 3, and the convex portion 13 extends along the extension direction of the cooling channel to limit the abutment of the multiple battery cells 3.

[0039] refer to Figure 3 and Figure 4 , between two adjacent battery cells 3, the outer part of the top cover 31 of each battery cell 3, that is, the shoulder of the top cover 31, the convex part 13 abuts against the shoulders of the top covers 31 of the two adjacent battery cells 3 to limit them, and the cooling plate 2 corresponds to the middle position of the top cover 31 to cool the pole 32 on the top cover 31. A convex part 13 is provided between two adjacent cooling plates 2, corresponding to the arrangement of multiple battery cells 3, so that the cooling plate 2 cools the pole 32 and the convex part 13 abuts against the shoulder of the top cover 31, and the battery box cover has a compact structure and occupies a small space.

[0040] In order to further improve the connection strength between the protrusion 13 and the top cover 31 , in some feasible embodiments, the convex top surface of the protrusion 13 has an adhesive portion, such as structural adhesive, and the protrusion 13 is bonded to the top cover 31 through the adhesive portion.

[0041] In another embodiment of the present application, a battery is provided, the battery comprising a battery box and a plurality of battery cells 3 arranged in the battery box. The battery box comprises a box body and the above-mentioned battery box cover, the battery box cover is covered on the box body, the specific structure of the battery box cover is detailed in the above-mentioned related content, and will not be repeated here. A pole 32 is provided on the top cover 31 of each battery cell 3, and the poles 32 of two adjacent battery cells 3 are conductively connected through a jumper structure 4, and the jumper structure 4 is connected to the cooling surface 22.

[0042] In yet another embodiment of the present application, a vehicle is provided. The vehicle includes the above-mentioned battery, and the battery provides electrical energy for the vehicle.

[0043] It should be noted that, in this article, relational terms such as "first" and "second" 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 term "comprises" or any other variant thereof is 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 sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0044] It should also be noted that, although the present application has been described with reference to the preferred embodiments, various improvements may be made thereto and components thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0045] 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 battery box cover, characterized in that: The invention comprises a cover plate and a cooling plate arranged on the cover plate, wherein the cooling plate has a cooling surface, and the cooling surface is exposed on the inner surface of the cover plate.

2. The battery box cover according to claim 1, characterized in that: The cooling plate is at least partially embedded in the cover plate, and the cooling surface protrudes from the inner surface of the cover plate.

3. The battery box cover according to claim 1, characterized in that: The cooling surface is provided with a flexible thermally conductive pad, which is a thermally conductive pad with deformation capability, and the flexible thermally conductive pad is bonded to the cooling surface.

4. The battery box cover according to claim 1, characterized in that: The inner surface of the cover plate is raised in a direction away from its outer surface to form a convex portion, and the convex top surface of the convex portion is arranged to protrude from the cooling surface in a direction away from the outer surface of the cover plate, and the convex portion is used to abut against a part of the top cover of the battery cell.

5. The battery box cover according to claim 4, characterized in that: The outer surface of the cover plate is partially recessed along the thickness direction of the cover plate toward the inner surface of the cover plate to form a groove, and the groove overlaps with the projection of the convex portion on the cover plate.

6. The battery box cover according to claim 5, characterized in that: There are a plurality of cooling plates, and the plurality of cooling plates are spaced apart and distributed along the length direction of the cover plate.

7. The battery box cover according to claim 6, characterized in that: A convex portion is provided between two adjacent cooling plates. The cooling plate has a cooling channel for fluid flow. The extension direction of the cooling channel intersects with the length direction of the cover plate. The convex portion extends along the extension direction of the cooling channel.

8. The battery box cover according to claim 4, characterized in that: The convex top surface of the convex portion has an adhesive portion.

9. A battery, characterized in that: include: A battery box, comprising a box body and a battery box cover as claimed in any one of claims 1 to 8, wherein the battery box cover is covered on the box body; There are multiple battery cells, which are located in the battery box. A pole is provided on the top cover of each battery cell. The poles of two adjacent battery cells are connected by a jumper structure, and the jumper structure is connected to the cooling surface.

10. A vehicle, characterized in that: Comprising the battery as claimed in claim 9.

Images