Lower case of battery device and battery device

Abstract

The utility model discloses a lower box body of battery device and battery device relates to battery technical field, the lower box body of battery device includes: outer frame and shell lining, the outer frame defines and installs the groove, at least part of shell lining is located in the installation groove, shell lining and the outer frame are all composite material spare, shell lining and the outer frame fixed connection, shell lining forms and has heat exchange medium flow space. According to the lower box body of battery device of the application embodiment, by setting shell lining and the outer frame can all be composite material spare, and the lower box body has the advantages such as light weight, corrosion -resistant, heat -preserving effect is good, and the cost of shell lining and the outer frame made of composite material is low, is favorable for reducing the cost of battery device, is favorable for improving the heat -preserving performance of battery device.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a lower housing of a battery device and a battery device having the lower housing. Background Technology

[0002] In related technologies, the lower casing of existing battery devices is made of metal materials, which has problems such as high cost and large overall weight. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a lower casing for a battery device, which has advantages such as light weight, corrosion resistance, and good thermal insulation, thereby reducing the cost of the battery device and improving its thermal insulation performance.

[0004] This utility model also proposes a battery device using the aforementioned lower housing.

[0005] The lower housing of the battery device according to a first aspect of the present invention includes: an outer frame and a housing liner, the outer frame defining a mounting groove, at least a portion of the housing liner being disposed within the mounting groove, the housing liner and the outer frame being composite material parts, the housing liner and the outer frame being fixedly connected, and the housing liner forming a heat exchange medium flow space.

[0006] According to the embodiments of this application, the lower housing of the battery device can be made of composite materials for both the inner liner and the outer frame. The lower housing has advantages such as light weight, corrosion resistance, and good heat insulation. Moreover, the cost of the inner liner and outer frame made of composite materials is low, which helps to reduce the cost of the battery device and improve the heat insulation performance of the battery device.

[0007] According to some embodiments of the present invention, the housing liner has an inner substrate wall located in the mounting groove, the outer frame has a groove bottom wall, the inner substrate wall and the groove bottom wall are opposite to each other, and the inner substrate wall forms the heat exchange medium flow space.

[0008] According to some embodiments of the present invention, the lower housing further includes: a heat spreader plate, a medium flow channel is formed on the side of the inner substrate wall away from the bottom wall of the tank, the medium flow channel is the flow space of the heat exchange medium, the heat spreader plate is located on the side of the inner substrate wall away from the bottom wall of the tank, and the heat spreader plate is covered on the open end of the medium flow channel so that the inner substrate wall and the heat spreader plate together define the heat exchange channel.

[0009] According to some embodiments of this utility model, the temperature distribution plate and the inner lining of the shell are fixedly connected.

[0010] According to some embodiments of the present invention, the surface of the heat spreader away from the inner substrate wall is provided with an insulating layer.

[0011] According to some embodiments of this utility model, the temperature distribution plate is a metal part.

[0012] According to some embodiments of the present invention, the outer frame has a groove bottom wall, and the groove bottom wall has a plurality of through holes, all of which penetrate the groove bottom wall along the thickness direction.

[0013] According to some embodiments of the present invention, at least one of the through holes is a polygonal hole.

[0014] According to some embodiments of the present invention, the lower housing further includes a bottom protective plate, which is located on the side of the bottom wall of the groove away from the inner lining wall.

[0015] According to some embodiments of the present invention, the shape of the outer frame is adapted to the shape of the inner liner of the housing, and the outer surface of the inner liner of the housing facing the outer frame is in contact with the inner wall surface of the mounting groove.

[0016] The battery device according to a second aspect of the present invention includes the lower housing of the battery device described in the above embodiments.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an exploded view of a battery device according to an embodiment of this application; Figure 2 This is an exploded view of the lower housing according to an embodiment of this application; Figure 3 This is a schematic diagram of the outer frame according to an embodiment of this application; Figure 4 This is a schematic diagram of the housing liner according to an embodiment of this application.

[0019] Figure label: Battery device 1, Lower box 100, Outer frame 10, mounting groove 11, groove bottom wall 111, through hole 1111, structural component 12, bushing 13, first reinforcing rib 14, second reinforcing rib 15 Shell liner 20, heat exchange medium flow space 21, inner liner wall 22, medium flow channel 221 Heat spreader 30, Insulation layer 40, 50mm crossbeam structure Bottom guard plate 60, Top cover 200, battery module 300, electrical components 400. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] The following is for reference. Figures 1-4 The lower housing 100 of the battery device 1 according to an embodiment of the present utility model is described. The lower housing 100 can be applied inside the battery device 1.

[0022] According to the first aspect of the present invention, the lower housing 100 of the battery device 1 is as follows: Figures 1-4 As shown, the lower housing 100 of the battery device 1 may include an outer frame 10 and a housing liner 20. The outer frame 10 defines a mounting groove 11. At least a portion of the housing liner 20 is disposed in the mounting groove 11. Both the housing liner 20 and the outer frame 10 are composite material parts. The housing liner 20 and the outer frame 10 are fixedly connected. The housing liner 20 forms a heat exchange medium flow space 21.

[0023] It should be noted that the lower casing of the existing battery device is made of metal, which has problems such as high cost and large overall weight.

[0024] Based on this, this application proposes a lower housing 100 for a battery device 1. An outer frame 10 defines a mounting groove 11, one end of which is open along the height direction of the outer frame 10, allowing the mounting groove 11 to have an open end. When the outer frame 10 is arranged vertically, the mounting groove 11 is open towards the top of the outer frame 10. At least a portion of the inner housing liner 20 can be disposed within the mounting groove 11. The inner housing liner 20 can be connected to the outer frame 10, and the outer frame 10 can be used to fix and support the inner housing liner 20. Both the inner housing liner 20 and the outer frame 10 can be composite materials. Composite materials have characteristics such as corrosion resistance, low thermal conductivity, and low density, thus giving the inner housing liner 20 and the outer frame 10 advantages such as light weight, corrosion resistance, and good thermal insulation. As an example, the inner housing liner 20 can be made of materials such as polypropylene and continuous fiberglass cloth, and the outer frame 10 can be made of a long glass fiber reinforced polypropylene composite material with a long glass fiber content of 40%. Furthermore, compared with existing technologies, the thermal conductivity of composite materials is much lower than that of metal materials. By setting both the inner liner 20 and the outer frame 10 of the shell to be composite material parts, it is beneficial to improve the heat preservation performance of the battery device 1.

[0025] Both the inner liner 20 and the outer frame 10 can be injection molded, and the inner liner 20 and the outer frame 10 can be integrally molded. As an example, while both the inner liner 20 and the outer frame 10 are injection molded, they can also be manufactured using a hot-press injection molding process. The inner liner 20 is heated and placed into a mold, then injection molded after mold closing. Simultaneously, the heat exchange medium flow space 21 can be directly formed, which improves the integrity of the heat exchange medium flow space 21 and the inner liner 20. The inner liner 20 can form the heat exchange medium flow space 21, which can be constructed as a channel, groove, or other structure. When the inner liner 20 is injection molded, the heat exchange medium flow space 21 can be directly formed, allowing the heat exchange medium to flow within it, thereby achieving the effect of controlling the temperature of the battery device 1.

[0026] In this embodiment, by setting both the inner shell liner 20 and the outer frame 10 to be composite materials, the lower housing 100 has advantages such as light weight, corrosion resistance, and good heat insulation. Moreover, the inner shell liner 20 and the outer frame 10 made of composite materials have low cost, which helps to reduce the cost of the battery device 1 and improve the heat insulation performance of the battery device 1.

[0027] As an example, when the outer frame 10 is injection molded, a structural component 12 for installing high-voltage plugs, low-voltage plugs, etc. can be embedded in the outer frame 10. The structural component 12 can be made of metal material. By setting the structural component 12 to be integrally molded with the outer frame 10, it is convenient for the structural component 12 and the outer frame 10 to be assembled together, which helps to reduce the assembly process of the battery device 1 and improve the convenience of assembling the battery device 1.

[0028] As an example, when the outer frame 10 is injection molded, a mounting part for installing electrical components 400 such as BDMU and BMS can also be injection molded, which helps to further reduce the assembly process of the battery device 1 and further improve the convenience of assembling the battery device 1.

[0029] As an example, when the outer frame 10 is injection molded, multiple bushings 13 can also be embedded inside the outer frame 10, and the bushings 13 can be used to connect with the vehicle body structure.

[0030] In some embodiments of this utility model, such as Figure 2 and Figure 4 As shown, the inner liner 20 of the housing has an inner substrate wall 22 located in the mounting groove 11, and the outer frame 10 has a groove bottom wall 111. The inner substrate wall 22 and the groove bottom wall 111 are opposite to each other, and the inner substrate wall 22 forms a heat exchange medium flow space 21.

[0031] The housing liner 20 may have an inner substrate wall 22, which may be located within the mounting groove 11. The inner substrate wall 22 may be opposite to the bottom wall 111 of the groove along the height direction of the outer frame 10, and the inner substrate wall 22 may be located above the bottom wall 111, which may support the inner substrate wall 22. The inner substrate wall 22 may form a heat exchange medium flow space 21, within which a heat exchange medium may flow. The battery device 1 may include a battery module 300, at least a portion of which may be installed within the mounting groove 11. The housing liner 20 may support the battery module 300, meaning the battery module 300 may be located above the inner substrate wall 22. The heat exchange medium located within the heat exchange medium flow space 21 may exchange heat with the battery module 300, which helps to shorten the heat transfer path.

[0032] As an example, the outer frame 10 is located on the side of the heat exchange medium flow space 21 away from the battery module 300, which can effectively reduce the heat conduction to the outside of the battery device 1 through the inner liner 20 of the housing, which is beneficial to further improve the heat preservation performance of the battery device 1.

[0033] In some embodiments of this utility model, such as Figure 2As shown, the lower housing 100 may further include: a heat exchange plate 30, a medium flow channel 221 formed on the side of the inner substrate wall 22 away from the bottom wall 111 of the tank, the medium flow channel 221 being a heat exchange medium flow space 21, the heat exchange plate 30 being located on the side of the inner substrate wall 22 away from the bottom wall 111 of the tank, and the heat exchange plate 30 covering the open end of the medium flow channel 221 so that the inner substrate wall 22 and the heat exchange plate 30 together define the heat exchange channel.

[0034] The inner substrate wall 22 may have a medium flow channel 221 formed therein. The medium flow channel 221 may be located on the side of the inner substrate wall 22 away from the bottom wall 111 of the channel. The medium flow channel 221 may be recessed into the inner substrate wall 22 and open towards the upper surface of the inner substrate wall 22. The medium flow channel 221 may be configured as a heat exchange medium flow space 21, and heat exchange medium may flow inside the medium flow channel 221. A heat spreader 30 may be installed inside the shell liner 20. The heat spreader 30 may be located on the side of the inner substrate wall 22 away from the bottom wall 111 of the channel. The heat spreader 30 may cover the open end of the medium flow channel 221 and may close the medium flow channel 221. The inner lining wall 22 and the heat exchange plate 30 together define the heat exchange channel, within which the heat exchange medium can flow. This helps reduce the probability of the heat exchange medium flowing out from the open end of the medium flow channel 221, and improves the reliability of the heat exchange medium flowing within the medium flow channel 221. By integrating the heat exchange channel onto the shell lining 20, the number of components in the lower housing 100 is reduced, further reducing the weight of the lower housing 100 and improving the assembly efficiency of the lower housing 100.

[0035] As an example, thermally conductive structural adhesive can be provided between the heat spreader 30 and the battery module 300, which is beneficial to achieve the effect of heat conduction while connecting the heat spreader 30 and the battery module 300, which is beneficial to improve the connection strength between the heat spreader 30 and the battery module 300, and beneficial to improve the heat exchange efficiency between the battery module 300 and the heat exchange medium.

[0036] In some embodiments of this utility model, the temperature distribution plate 30 and the inner liner of the shell are fixedly connected.

[0037] The heat exchange plate 30 is fixedly connected to the shell liner 20. The heat exchange plate 30 can be bonded to the shell liner 20. The heat exchange plate 30 can be bonded to the side surface of the inner wall 22 of the inner wall liner 22 that is away from the bottom wall 111 of the tank. This is beneficial to improving the sealing and reliability of the heat exchange channel, further reducing the probability of the heat exchange medium leaking from the medium flow tank 221, and further improving the reliability of the heat exchange medium when it flows in the medium flow tank 221.

[0038] In some embodiments of this utility model, the surface of the heat spreader 30 facing away from the inner substrate wall 22 is provided with an insulating layer 40.

[0039] A heat spreader 30 can be disposed between the battery module 300 and the inner substrate wall 22, and the side of the heat spreader 30 facing away from the inner substrate wall 22 can contact the battery module 300. The insulating layer 40 can be made of resin material. By providing an insulating layer 40 on the surface of the heat spreader 30 facing away from the inner substrate wall 22, the insulating layer 40 can isolate and protect the heat spreader 30, which is beneficial to improving the insulation of the heat spreader 30 and improving the reliability of the heat spreader 30.

[0040] In some embodiments of this utility model, the heat spreader 30 is a metal part.

[0041] The heat spreader 30 can be constructed as a metal component, as metal has good thermal conductivity. By making the heat spreader 30 a metal component, it can effectively conduct heat, which helps improve the heat exchange efficiency between the battery module 300 and the heat exchange medium, and also helps to ensure uniform heat distribution among the multiple battery cells in the battery module 300. The heat spreader 30 and the inner liner 20 of the housing can be bonded together with structural adhesive. By making the heat spreader 30 a metal component, the structural strength of the heat spreader 30 is improved, which helps to reduce the probability of heat exchange channel cracking and leakage.

[0042] In some embodiments of this utility model, such as Figure 3 As shown, the outer frame 10 has a groove bottom wall 111, and the groove bottom wall 111 has a plurality of through holes 1111, which all penetrate the groove bottom wall 111 along the thickness direction of the groove bottom wall 111.

[0043] The outer frame 10 may have a bottom wall 111, which may be located at the bottom of the outer frame 10. The bottom wall 111 may have multiple through holes 1111, which penetrate the bottom wall 111 along its thickness direction. These through holes are arranged sequentially and evenly on the bottom wall 111, which helps reduce stress concentration. By providing multiple through holes 1111, the weight of the outer frame 10 can be reduced while maintaining the structural strength of the bottom wall 111, further reducing the weight of the battery device 1. Furthermore, since the outer frame 10 is a composite material, the multiple through holes 1111 are easily machined during injection molding, improving the processing efficiency of the outer frame 10.

[0044] In some embodiments of this utility model, such as Figure 3 As shown, at least one through hole 1111 is a polygonal hole.

[0045] At least one through hole 1111 can be a polygonal hole, which can be a regular polygon, such as a regular hexagon. This embodiment of the application uses the example of multiple through holes 1111 being polygonal holes, specifically regular hexagonal holes. The gap between two adjacent regular hexagonal holes is small. When the arrangement area is the same, by setting the polygonal holes to regular hexagonal holes, a larger number of through holes 1111 can be arranged, which is beneficial for improving the structural compactness of the multiple through holes 1111, improving the space utilization rate of the bottom wall 111 of the groove, and further reducing the weight of the outer frame 10.

[0046] In some embodiments of this utility model, such as Figure 2 As shown, the lower housing 100 may further include a bottom protective plate 60, which is located on the side of the bottom wall 111 away from the inner bottom wall 22.

[0047] The lower housing 100 may also include a bottom protective plate 60. The bottom protective plate 60 may be located on the side of the bottom wall 111 away from the inner bottom wall 22. The bottom protective plate 60 may be a metal part. The bottom protective plate 60 may protect the bottom of the outer frame 10, which helps to reduce the probability of damage to the battery device 1 when it is hit from the bottom, and helps to further extend the service life of the battery device 1.

[0048] In some embodiments of this utility model, the shape of the outer frame 10 is adapted to the shape of the inner shell liner 20, and the outer surface of the inner shell liner 20 facing the outer frame 10 and the inner wall surface of the mounting groove 11 are in contact.

[0049] The outer frame 10 can be assembled with the inner shell liner 20. The shape of the outer frame 10 can be adapted to the shape of the inner shell liner 20. The outer surface of the inner shell liner 20 facing the outer frame 10 can fit with the inner wall of the mounting groove 11. The bottom wall 111 of the groove can contact and fit with the inner wall 22 of the inner shell liner. This is beneficial to improving the structural compactness of the outer frame 10 and the inner shell liner 20, improving the overall integrity of the lower box 100, and reducing the processing difficulty of the outer frame 10 and the inner shell liner 20 being integrally formed.

[0050] As an example, the sidewall of the outer frame 10 may be provided with a first reinforcing rib 14 and a second reinforcing rib 15, both of which are located on the outer surface of the outer frame 10 away from the inner liner 20. There may be multiple first reinforcing ribs 14 and 15. Multiple first reinforcing ribs 14 may extend along a first direction and may be opposite to each other and spaced apart along a second direction. Similarly, multiple second reinforcing ribs 15 may extend along a second direction and may be opposite to each other and spaced apart along the first direction. The first reinforcing ribs 14 and 15 are perpendicular to each other. When the outer frame 10 is as follows... Figure 3 When setting, the first direction is Figure 3 In the X direction, the current box is 100. Figure 3 When setting the direction, the second direction can be... Figure 3 In the Z direction, the first direction and the second direction are perpendicular to each other.

[0051] According to a second aspect of the present invention, the battery device 1 includes the lower housing 100 of the battery device 1 in the above embodiment.

[0052] According to the battery device 1 of the present application, using the lower housing 100 of the battery device 1 in the above embodiment is beneficial to reducing the weight of the battery device 1 and reducing the cost of the battery device 1.

[0053] As an example, the battery device 1 may also include a top cover 200, which can be assembled with the lower housing 100 by means of bonding or hot pressing, which helps to improve the assembly efficiency of the top cover 200 and the lower housing 100. When the outer frame 10 is injection molded, multiple connecting nuts can be embedded in the outer frame 10, and the top cover 200 can be connected to the connecting nuts on the outer frame 10 by bolts, which helps to simplify the installation of the top cover 200.

[0054] As an example, the battery device 1 also includes multiple crossbeam structures 50, which can be arranged sequentially along a first direction. The multiple crossbeam structures 50 can be located on the side of the heat spreader 30 opposite to the medium flow channel 221. The battery module 300 can be fixedly connected to the crossbeam structures 50, which can be used to fix and support the battery module 300. By setting multiple crossbeam structures 50, the reliability of the battery module 300 installation is improved, the impact resistance of the battery device 1 is enhanced, and the service life of the battery device 1 is extended.

[0055] The lower housing 100 and other components and operations of the battery device 1 according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A lower casing for a battery device, characterized in that, include: An outer frame (10) and a housing liner (20) are provided. The outer frame (10) defines a mounting groove (11). At least a portion of the housing liner (20) is disposed within the mounting groove (11). Both the housing liner (20) and the outer frame (10) are composite material parts. The housing liner (20) and the outer frame (10) are fixedly connected. The housing liner (20) forms a heat exchange medium flow space (21).

2. The lower casing of the battery device according to claim 1, characterized in that, The housing liner (20) has an inner substrate wall (22) located in the mounting groove (11), the outer frame (10) has a groove bottom wall (111), the inner substrate wall (22) and the groove bottom wall (111) are opposite to each other, and the inner substrate wall (22) forms the heat exchange medium flow space (21).

3. The lower casing of the battery device according to claim 2, characterized in that, The lower housing (100) further includes a heat exchange plate (30). A medium flow channel (221) is formed on the side of the inner substrate wall (22) away from the bottom wall (111) of the tank. The medium flow channel (221) is the heat exchange medium flow space (21). The heat exchange plate (30) is located on the side of the inner substrate wall (22) away from the bottom wall (111) of the tank. The heat exchange plate (30) covers the open end of the medium flow channel (221) so that the inner substrate wall (22) and the heat exchange plate (30) together define the heat exchange channel.

4. The lower casing of the battery device according to claim 3, characterized in that, The temperature distribution plate (30) and the shell liner (20) are fixedly connected.

5. The lower casing of the battery device according to claim 3, characterized in that, The surface of the heat spreader (30) facing away from the inner substrate wall (22) is provided with an insulating layer (40).

6. The lower casing of the battery device according to claim 3, characterized in that, The temperature distribution plate (30) is a metal part.

7. The lower casing of the battery device according to claim 1, characterized in that, The outer frame (10) has a groove bottom wall (111) with a plurality of through holes (1111) formed therein, and the plurality of through holes (1111) penetrate the groove bottom wall (111) along the thickness direction of the groove bottom wall (111).

8. The lower casing of the battery device according to claim 7, characterized in that, At least one of the through holes (1111) is a polygonal hole.

9. The lower casing of the battery device according to any one of claims 2-8, characterized in that, The lower housing (100) further includes a bottom protective plate (60), which is located on the side of the bottom wall (111) of the groove away from the inner bottom wall (22).

10. The lower casing of the battery device according to any one of claims 1-8, characterized in that, The shape of the outer frame (10) is adapted to the shape of the inner shell liner (20), and the outer surface of the inner shell liner (20) facing the outer frame (10) is in contact with the inner wall of the mounting groove (11).

11. A battery device, characterized in that, Includes the lower housing (100) of the battery device (1) according to any one of claims 1-10.

Images