Power battery assembly and vehicle

Abstract

The power battery assembly comprises a frame, a battery cell module, a first heat exchange plate and a second heat exchange plate, and the battery cell module is mounted in the frame; the first heat exchange plate is arranged at the bottom of the frame and is thermally connected with the battery cell module; the second heat exchange plate is arranged at the top of the frame and is in thermal connection with the battery cell module, the second heat exchange plate is provided with two side edge parts, and the two side edge parts are arranged on the two sides, in the width direction of the frame, of the second heat exchange plate and abut against the frame respectively; at least one side edge part is provided with a reinforcing plate, and the reinforcing plate is fixedly connected with the frame and the corresponding side edge part. Therefore, on one hand, the heat dissipation efficiency of the power battery assembly can be improved, and the balance of temperature distribution of the battery cell module is improved; on the other hand, the bottom of the power battery assembly can be prevented from protruding after the length edge of the frame is collided, and the effect of improving the use safety of the power battery assembly is achieved.

Description

Technical Field

[0001] This utility model belongs to the technical field of power battery heat dissipation, and in particular relates to a power battery assembly and vehicle. Background Technology

[0002] As the market share of new energy vehicles continues to expand, the demand for fast charging performance of power battery packs in new energy vehicles needs to be further improved.

[0003] Currently, traditional blade-shaped power battery assemblies typically have a heat exchange plate between the bottom plate and a narrow side of the bottom of the battery cell, with a top cover covering the narrow side of the top of the cell. During operation, the battery assembly utilizes heat exchange between the heat exchange plate and the cell to dissipate heat. However, because the cell only exchanges heat through one narrow side, the heat exchange area is small, and the heat transfer path is long. This results in a low heat transfer coefficient and uneven temperature distribution within the cell, thus affecting the fast-charging capability of the battery assembly. Utility Model Content

[0004] In view of this, it is necessary to provide a power battery assembly and vehicle for solving the above-mentioned technical problems.

[0005] A power battery assembly, comprising:

[0006] A power battery module includes a frame and a cell module, wherein the cell module is installed within the frame;

[0007] A first heat exchange plate is disposed at the bottom of the frame and thermally connected to the battery cell module for heat dissipation of the battery cell module;

[0008] The second heat exchange plate is disposed on the top of the frame and is thermally connected to the battery cell module for heat dissipation of the battery cell module. The second heat exchange plate has two side portions, which are arranged on both sides of the second heat exchange plate in the width direction of the frame and respectively abut against the frame.

[0009] At least one of the side portions is provided with a reinforcing plate, and the reinforcing plate is fixedly connected to the frame and the corresponding side portion respectively.

[0010] It is understandable that using the first and second heat exchange plates to dissipate heat on the bottom and top sides of the battery cell module, and using reinforcing plates to structurally strengthen the connection of the second heat exchange plate to the frame, can, on the one hand, increase the heat exchange area of ​​the battery cell module and shorten the heat transfer path during heat dissipation, thereby improving the heat dissipation efficiency of the power battery assembly and the uniformity of the temperature distribution of the battery cell module; on the other hand, it can also improve the connection strength between the corresponding side of the second heat exchange plate and the frame, optimize the force transmission path of the long side of the frame, and prevent the bottom of the power battery assembly from bulging due to uneven force transmission after the long side of the frame is hit, thus improving the safety of the power battery assembly.

[0011] In one embodiment, the reinforcing plate is abutted against and connected to the corresponding side portion;

[0012] The power battery assembly also includes a connector, which passes through the reinforcing plate and the corresponding side portion and is connected to the frame.

[0013] Understandably, the reinforcing plate is pressed and positioned onto the frame using connectors, which facilitates its assembly onto the frame.

[0014] In one embodiment, the reinforcing plate is connected to the corresponding side portion by adhesive bonding or welding.

[0015] It is understandable that the reinforcement plate is assembled with the corresponding side part by means of adhesive or welding. This facilitates the assembly of the reinforcement plate on the corresponding side part, thus creating conditions for the subsequent connecting parts to press and limit the reinforcement plate on the frame.

[0016] In one embodiment, the connector is threaded to the frame.

[0017] Understandably, the connector is threaded to the frame, which facilitates the assembly of the connector on the frame.

[0018] In one embodiment, the number of connectors is configured to be multiple, and the multiple connectors are arranged sequentially at intervals along the length direction of the frame to press and limit the reinforcing plate and the corresponding side portion to the frame.

[0019] It is understandable that using multiple connectors to assemble the reinforcing plate on the frame provides multiple stress points, thereby improving the stability of the reinforcing plate assembly on the frame.

[0020] In one embodiment, the reinforcing plate is configured as an aluminum plate;

[0021] Alternatively, the reinforcing plate may be configured as a steel plate.

[0022] Understandably, by utilizing the material properties of aluminum and steel, this power battery assembly can use reinforcing plates of different hardness to achieve structural reinforcement of the corresponding side portion of the second heat exchange plate when it is assembled on the frame.

[0023] In one embodiment, the reinforcing plate is provided on each of the two side portions.

[0024] It is understandable that reinforcing plates are installed on both sides to ensure that both sides of the second heat exchange plate are structurally reinforced when assembled on the frame.

[0025] In one embodiment, the power battery module further includes a base plate disposed at the bottom of the frame and connected to the frame, for pressing and limiting the first heat exchange plate to the frame.

[0026] It is understandable that the base plate is used to press and limit the first heat exchange plate to the frame, which can meet the usage requirements of the battery cell module being assembled inside the frame and achieve structural reinforcement at the bottom of the frame.

[0027] In one embodiment, the number of battery cell modules is configured as multiple groups, and the multiple groups of battery cell modules are arranged sequentially at intervals along the width direction of the frame;

[0028] The multiple sets of battery cell modules are respectively thermally connected to the first heat exchange plate and the second heat exchange plate.

[0029] This application also claims protection for a vehicle that includes the aforementioned power battery assembly.

[0030] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0031] The power battery assembly and vehicle claimed in this application use a first heat exchange plate and a second heat exchange plate to dissipate heat on the bottom and top sides of the cell module. A reinforcing plate is used to structurally strengthen the connection between the second heat exchange plate and the frame. This increases the heat exchange area of ​​the cell module and shortens the heat transfer path during heat dissipation, thereby improving the heat dissipation efficiency of the power battery assembly and the uniformity of the temperature distribution of the cell module. Furthermore, it enhances the connection strength between the corresponding side portion of the second heat exchange plate and the frame, optimizing the force transmission path along the length of the frame. This prevents uneven force transmission from causing the bottom of the power battery assembly to bulge after a collision, thus improving the safety of the power battery assembly. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the power battery assembly provided in this application.

[0034] Figure 2 This is a schematic diagram of the battery cell module assembled within the frame in this application.

[0035] Figure 3 This is a schematic diagram of the structure when the reinforcing plate is assembled on the side of the second heat exchange plate in this application.

[0036] Figure 4 This is a schematic diagram of the structure in this application where the reinforcing plate is pressed and limited to the frame by the connector.

[0037] Figure 5 This is a schematic diagram of the structure when the long side of the frame in this application is subjected to a collision and force is transmitted.

[0038] Reference numerals: 100, power battery assembly; 11, frame; 111, bottom; 112, top; 113, length side; 12, cell module; 13, base plate; 20, first heat exchange plate; 30, second heat exchange plate; 31, side part; 40, reinforcing plate; 410, connector; 420, adhesive. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] It should be noted that when a component is said to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or may have an intervening component.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] The power battery assembly 100 claimed in this application specifically refers to the blade-type power battery assembly used in new energy vehicles.

[0043] like Figures 1 to 5 As shown, an embodiment of this application provides a power battery assembly 100, including a power battery module, a first heat exchange plate 20, and a second heat exchange plate 30. The power battery module includes a frame 11 and a cell module 12, with the cell module 12 installed inside the frame 11. The first heat exchange plate 20 is disposed at the bottom 111 of the frame 11 and is thermally connected to the cell module 12 for heat dissipation. The second heat exchange plate 30 is disposed at the top 112 of the frame 11 and is thermally connected to the cell module 12 for heat dissipation. The second heat exchange plate 30 has two side portions 31, which are arranged on both sides of the second heat exchange plate 30 in the width direction of the frame 11 and respectively abut against the frame 11. At least one side portion 31 is provided with a reinforcing plate 40, which is fixedly connected to the frame 11 and the corresponding side portion 31. Here, the first heat exchange plate 20 and the second heat exchange plate 30 mentioned above can be liquid cooling plates made of aluminum material found in existing power battery assemblies.

[0044] As can be seen from the above, the power battery assembly 100 of this application makes full use of the area that can be used for heat exchange when the cell module 12 is assembled in the frame 11. The first heat exchange plate 20 and the second heat exchange plate 30 are used to dissipate heat on the bottom and top sides of the cell module 12, and the connection of the second heat exchange plate 30 to the frame 11 is structurally strengthened by the reinforcing plate 40. On the one hand, this can increase the heat exchange area of ​​the cell module 12 and shorten the heat transfer path when the cell module 12 dissipates heat, thereby improving the heat dissipation efficiency of the power battery assembly 100 and improving the uniformity of the temperature distribution of the cell module 12. On the other hand, it can also improve the connection strength between the corresponding side part 31 on the second heat exchange plate 30 and the frame 11, optimize the force transmission path of the long side of the frame 11, and prevent the bottom of the power battery assembly 100 from bulging due to uneven force transmission after the long side of the frame 11 is hit, thus improving the safety of the power battery assembly 100.

[0045] It should be noted that, since the power battery assembly 100 of this application uses the first heat exchange plate 20 and the second heat exchange plate 30 to exchange heat with the cell module 12 respectively, this increases the temperature regulation capability of the thermal management system of the power battery assembly 100 for the cell module 12. Furthermore, thermal runaway of the cell module 12 is mainly caused by high temperature leading to damage to the internal structure of the cell module 12. This application increases the contact area between the cell module 12 and the heat exchange plates, enabling the first heat exchange plate 20 and the second heat exchange plate 30 to effectively remove the heat generated during thermal runaway of the cell module 12, reducing the rate of temperature rise of the cell module 12, thereby improving the safety performance of the power battery assembly 100.

[0046] like Figure 2 As shown, in one embodiment, the number of battery cell modules 12 is configured as multiple groups, with the multiple groups of battery cell modules 12 arranged sequentially at intervals along the width direction of the frame 11; and the multiple groups of battery cell modules 12 are respectively thermally connected to the first heat exchange plate 20 and the second heat exchange plate 30. That is, the multiple groups of battery cell modules 12 share one first heat exchange plate 20 and one second heat exchange plate 30 for heat exchange. Here, the number of battery cell modules 12 is configured as three groups. It can be understood that in other embodiments, the number of battery cell modules 12 may also be two groups, four groups, or even more groups, which will not be elaborated here.

[0047] like Figure 1 , Figure 5 As shown, in one embodiment, the power battery module further includes a base plate 13, which is disposed at the bottom of the frame 11 and connected to the frame 11. The base plate 13 is used to press and limit the first heat exchange plate 20 onto the frame 11, thus meeting the usage requirements for assembling the cell module 12 within the frame 11 and providing structural reinforcement to the bottom of the frame 11. It should be noted that the specific structure of the base plate 13 and its connection to the frame 11 can adopt conventional methods of existing power battery assemblies, and will not be elaborated upon here.

[0048] In this application, the second heat exchange plate 30, due to its structure and manufacturability, has a weak material, thin thickness, and poor structural strength. Therefore, this application uses a reinforcing plate 40 connected to the side edge 31 of the second heat exchange plate 30 to structurally strengthen the assembly between the second heat exchange plate 30 and the length side 113 of the frame 11. For example... Figure 5As shown, after a collision, the long side 113 of the frame 11 forms a C-shaped force transmission structure with the base plate 13 and the second heat exchange plate 30. During this process, the second heat exchange plate 30 can bear more force transmission, optimizing the force transmission path and improving the collision resistance of the power battery assembly 100. It should be noted that since the power battery assembly 100 is typically buffered by the vehicle's chassis or other structures in the width direction of the frame 11 during vehicle assembly, the side of the second heat exchange plate 30 in this application does not need to be reinforced with a reinforcing plate in the width direction of the frame 11.

[0049] like Figure 3 As shown, in one embodiment, the reinforcing plate 40 extends along the length side 113 of the frame 11, and in the length direction of the frame 11, the reinforcing plate 40 can cover the corresponding side portion 31 on the second heat exchange plate 30. That is, in this embodiment, the reinforcing plate 40 can structurally strengthen the assembly of the entire corresponding side portion 31 on the frame 11, so that when different positions of the length side 113 of the frame 11 are subsequently impacted, the second heat exchange plate 30 can participate in the effective transmission of force on the length side 113 of the frame 11. It is understood that in other embodiments, multiple reinforcing plates 40 arranged at intervals can also be used to structurally strengthen the assembly of the corresponding side portion 31 on the second heat exchange plate 30 on the frame 11, which will not be elaborated here.

[0050] like Figure 4 As shown, in one embodiment, the reinforcing plate 40 is abutted against and connected to the corresponding side portion 31; wherein, the power battery assembly 100 further includes a connector 410, which passes through the reinforcing plate 40 and the corresponding side portion 31 and is connected to the frame 11. That is to say, in this embodiment, the power battery assembly 100 uses the connector 410 to press and limit the reinforcing plate 40 to the frame 11, which facilitates the assembly of the reinforcing plate 40 on the frame 11.

[0051] like Figure 4 As shown, in this embodiment, the reinforcing plate 40 is connected to the corresponding side portion 31 by adhesive or welding. This facilitates the assembly of the reinforcing plate 40 on the corresponding side portion 31, creating conditions for the subsequent clamping and limiting of the reinforcing plate 40 on the frame 11 by the connecting piece 410. That is, the reinforcing plate 40 needs to be first connected to the corresponding side portion 31 on the second heat exchange plate 30 as a single unit, and then the connecting piece 410 is used to sequentially pass through the reinforcing plate 40 and the side portion 31 before being connected and fixed to the frame 11. Here, the reinforcing plate 40 is fixed to the side portion 31 by adhesive 420.

[0052] like Figure 4As shown, in this embodiment, the connector 410 is threaded to the frame 11, which facilitates the assembly of the connector 410 onto the frame 11. Here, the connector 410 is configured as a bolt. It can be understood that in other embodiments, the connector 410 may also be connected and fixed to the frame 11 by a snap-fit ​​or tight-fit method.

[0053] like Figure 3 As shown, in this embodiment, multiple connectors 410 are configured, and these connectors 410 are arranged sequentially at intervals along the length of the frame 11 to press and limit the reinforcing plate 40 and the corresponding side portion 31 onto the frame 11. In other words, the reinforcing plate 40 in this embodiment can be fixed to the frame 11 by the action of multiple connectors 410, giving the reinforcing plate 40 multiple stress points when assembled on the frame 11, thus improving the stability of the reinforcing plate 40 assembled on the frame 11.

[0054] In one embodiment, the reinforcing plate 40 of this application is configured as an aluminum plate or a steel plate. This allows the power battery assembly 100 to use reinforcing plates 40 of different hardness to strengthen the structure of the corresponding side portion 31 on the second heat exchange plate 30 when it is assembled on the frame 11, so as to meet the usage requirements of different vehicles.

[0055] Specifically, when the side portion 31 of the second heat exchange plate 30 requires a greater structural reinforcement, a steel reinforcing plate 40 can be used to press and limit the side portion 31 to the frame 11; when the side portion 31 of the second heat exchange plate 30 only requires a smaller structural reinforcement, an aluminum reinforcing plate 40 can be used to press and limit the side portion 31 to the frame 11.

[0056] like Figure 3 , Figure 5 As shown, in one embodiment, reinforcing plates 40 are respectively provided on the two side portions 31. That is, in this embodiment, both side portions 31 of the second heat exchange plate 30 are structurally reinforced when assembled on the frame 11, so that the two long sides 113 of the frame 11 can effectively transmit force after a collision. It can be understood that in other embodiments, a reinforcing plate 40 may also be provided on one of the side portions 31 of the second heat exchange plate 30 to meet the usage requirements of different vehicle models.

[0057] In addition, this application also claims protection for a vehicle including the aforementioned power battery assembly 100.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. A power cell assembly, characterized by, The power battery assembly (100) comprises: A power battery module comprising a frame (11) and a cell module (12), wherein the cell module (12) is installed in the frame (11); A first heat exchange plate (20) arranged at the bottom (111) of the frame (11) and in thermal connection with the cell module (12) for heat dissipation of the cell module (12); A second heat exchange plate (30) arranged at the top (112) of the frame (11) and in thermal connection with the cell module (12) for heat dissipation of the cell module (12), wherein the second heat exchange plate (30) has two side edge portions (31) arranged at both sides of the second heat exchange plate (30) in the width direction of the frame (11) and abutting against the frame (11) respectively; At least one of the side edge portions (31) is provided with a reinforcing plate (40) fixedly connected with the frame (11) and the corresponding side edge portion (31).

2. The power cell assembly of claim 1, wherein, The reinforcing plate (40) is attached to and connected with the corresponding side edge portion (31); The power battery assembly (100) further comprises a connecting piece (410) arranged through the reinforcing plate (40) and the corresponding side edge portion (31) and connected with the frame (11).

3. The power cell assembly of claim 2, wherein, The reinforcing plate (40) is connected with the corresponding side edge portion (31) by gluing or welding.

4. The power cell assembly of claim 2, wherein, The connecting piece (410) is connected with the frame (11) by threading.

5. The power cell assembly of claim 2, wherein, The number of the connecting pieces (410) is configured to be multiple, and the multiple connecting pieces (410) are arranged in sequence and at intervals along the length direction of the frame (11) for pressing and limiting the reinforcing plate (40) and the corresponding side edge portion (31) to the frame (11).

6. The power cell assembly of claim 1, wherein, The reinforcing plate (40) is configured as an aluminum plate. Alternatively, the reinforcing plate (40) is configured as a steel plate.

7. The power cell assembly of any one of claims 1 to 6, wherein, The reinforcing plate (40) is arranged on each of the two side edge portions (31).

8. The power cell assembly of claim 1, wherein, The power battery module further comprises a bottom plate (13) arranged at the bottom (111) of the frame (11) and connected with the frame (11) for pressing and limiting the first heat exchange plate (20) to the frame (11).

9. The power cell assembly of claim 1, wherein, The number of the cell modules (12) is configured to be multiple groups, and the multiple groups of cell modules (12) are arranged in sequence and at intervals along the width direction of the frame (11); The multiple groups of cell modules (12) are in thermal connection with the first heat exchange plate (20) and the second heat exchange plate (30) respectively.

10. A vehicle characterized by comprising: The power battery assembly (100) of any one of claims 1 to 9.

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