Integrated structure of battery pack and automobile chassis

Abstract

According to the integrated structure of the battery pack and the automobile chassis, an upper-layer water cooling plate of the battery pack is used as a bottom plate of the automobile chassis, and a lower-layer water cooling plate of the battery pack is used as a battery cell module tray. The battery cell explosion-proof valve is arranged on the side vertical surface of the battery cell, and the battery pack explosion-proof valve is connected to the side vertical surface of the battery pack frame. The battery cells are arranged in a lying mode with the large-area faces facing upwards, the middle water-cooling plates are arranged between the adjacent rows of battery cells, the upper-layer water-cooling plates are arranged above the battery cells, and the lower-layer water-cooling plates are arranged below the battery cells. The integrated structure is high in integration level, small in integrated size, capable of reducing weight and cost, high in safety performance and high in temperature control efficiency of the battery cell.

Description

Technical Field

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

[0002] In the past, a tray was connected under the bottom plate of the car chassis and the battery pack was placed on the tray. This integrated structure was large in size. Moreover, the battery cells of the battery pack were arranged vertically with a small area facing upward. The explosion-proof valve of the battery cell was set on the top surface of the battery cell. The explosion-proof valve of the entire battery pack was set upward. When the bottom plate of the car chassis was bearing weight, it might press down on the explosion-proof valve, posing a risk of crushing the explosion-proof valve. In addition, once thermal runaway occurred, the thermal runaway gas would spray upward into the passenger compartment, which was not conducive to passenger safety.

[0003] In view of this, how to change the integrated structure of the battery pack and the vehicle chassis to avoid some or all of the above-mentioned disadvantages is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides an integrated structure of a battery pack and a vehicle chassis, wherein the vehicle chassis includes a chassis frame and a chassis bottom plate covering the frame opening of the chassis frame, the battery pack includes a battery pack frame, an upper water-cooling plate and a battery cell module, the battery cell module is arranged inside the battery pack frame, the upper water-cooling plate is connected above the battery pack frame, and the upper side of the battery pack frame is connected to the chassis frame, so that the upper water-cooling plate covers the frame opening of the chassis frame, thereby becoming the chassis bottom plate.

[0005] In one embodiment of the integrated structure of a battery pack and a vehicle chassis, the battery cell of the battery cell module is provided with a first explosion-proof valve, which is arranged on the side elevation of the battery cell; the battery pack includes a second explosion-proof valve, which is connected to the side elevation of the battery pack frame.

[0006] In one embodiment of the integrated structure of the battery pack and the automobile chassis, the battery pack frame includes a longitudinal beam and a cross beam, the second explosion-proof valve is connected to the side elevation of the cross beam of the battery pack frame, and the first explosion-proof valve faces the longitudinal beam of the battery pack frame.

[0007] In one embodiment of the integrated structure of the battery pack and the automobile chassis, the top surface area and the bottom surface area of the battery cell are both larger than the area of each side elevation of the battery cell, so that the battery cell is arranged in a lying position with a large area facing upward.

[0008] An embodiment of the integrated structure of a battery pack and a vehicle chassis, wherein the battery pack includes a lower water-cooling plate, which is connected below the battery pack frame and supports the battery cell module.

[0009] In one embodiment of the integrated structure of a battery pack and a vehicle chassis, the battery cell module includes an intermediate water-cooling plate, the battery cells of the battery cell module are arranged in a single layer or multiple layers, the battery cells in each layer are arranged in multiple vertical rows, and the intermediate water-cooling plate is arranged between two adjacent vertical rows.

[0010] An embodiment of the integrated structure of a battery pack and a vehicle chassis, wherein the battery pack includes a bottom guard plate, which is connected below the battery pack frame and covers the lower water-cooling plate.

[0011] In one embodiment of the integrated structure of the battery pack and the automobile chassis, a sealing structure is provided between the battery pack frame and the chassis frame, and / or a sealing structure is provided between the upper water-cooling plate and the battery pack frame, and / or a sealing structure is provided between the lower water-cooling plate and the battery pack frame.

[0012] An embodiment of the integrated structure of the battery pack and the automobile chassis, the automobile chassis further includes an upper beam and a lower beam, the upper beam and the lower beam are respectively connected above and below the chassis frame, and the battery pack is located between the upper beam and the lower beam.

[0013] An embodiment of the integrated structure of a battery pack and a vehicle chassis, wherein the vehicle chassis includes a front subframe, a rear subframe, a front anti-collision beam and a rear anti-collision beam, the chassis frame is connected between the front subframe and the rear subframe, and the front anti-collision beam and the rear anti-collision beam are respectively connected to the front and rear sides of the chassis frame.

[0014] The integrated structure of the battery pack and the vehicle chassis provided in this application has the following technical effects:

[0015] (1) The upper water-cooling plate of the battery pack is used as the bottom plate of the vehicle chassis, and the lower water-cooling plate of the battery pack is used as the battery module tray, so that the battery pack and the vehicle chassis are highly integrated and the integrated volume is small, thereby reducing weight and cost.

[0016] (2) The cell explosion-proof valve (i.e., the first explosion-proof valve) is set on the side surface of the cell, and the battery pack explosion-proof valve (i.e., the second explosion-proof valve) is connected to the side surface of the battery pack frame. On the one hand, this prevents the first explosion-proof valve and the second explosion-proof valve from being crushed when the upper water-cooling plate bears weight. On the other hand, when thermal runaway occurs, the high-temperature gas will be sprayed to one side instead of upward toward the passenger compartment, thereby improving the safety performance of the entire vehicle.

[0017] (3) The battery cells are arranged in a lying position with a large area facing upward, so that the first explosion-proof valve can be set on the side surface of the battery cell. Moreover, the battery cells are in contact with the upper and lower water-cooling plates with a large area, which makes the temperature control efficiency of the battery cells high.

[0018] (4) An intermediate water-cooling plate is set between adjacent rows of battery cells, an upper water-cooling plate is set above the battery cells, and a lower water-cooling plate is set below the battery cells, so that the side, top and bottom surfaces of the battery cells can be heated or cooled. Therefore, the temperature control efficiency of the battery cells is high and thermal runaway is not prone to occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of an embodiment of the integrated structure of a battery pack and a vehicle chassis provided in this application;

[0020] Figure 2 for Figure 1 Exploded diagram of some structures;

[0021] Figure 3 for Figure 1 Schematic diagram of part of the structure of the automobile chassis;

[0022] Figure 4 for Figure 2 Exploded view of part of the battery pack structure;

[0023] Figure 5 for Figure 4 Exploded view of part of the structure of the power cell module;

[0024] Figure 6 for Figure 1 Schematic diagram of the upper and lower beams of the car chassis.

[0025] The following are the descriptions of the reference numerals:

[0026] 1 automobile chassis, 11 chassis frame, 1101 front transverse mounting beam, 1102 rear transverse mounting beam, 1103 left longitudinal mounting beam, 1104 right longitudinal mounting beam, 12 upper beam, 13 lower beam, 14 front subframe, 15 rear subframe, 16 front anti-collision beam, 17 rear anti-collision beam;

[0027] 2 battery pack, 21 battery pack frame, 2101 longitudinal beam, 2102 cross beam, 2103 connection hole, 22 upper water-cooling plate, 23 battery cell module, 23a battery cell, 23b first explosion-proof valve, 23c intermediate water-cooling plate, 23d high-voltage conductive part, 23e integrated busbar, 23f end plate, 23g thermal insulation structure, 23h interlayer thermal conductive adhesive layer, 23i upper thermal conductive adhesive layer, 23j lower thermal conductive adhesive layer, 23k intermediate thermal conductive adhesive layer, 24 lower water-cooling plate, 25 lower sealing layer, 26 main sealing structure, 27 screws, 28 electrical structure, 29 second explosion-proof valve, 210 bottom guard plate, 211 water inlet and outlet structure. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] This application provides an integrated structure of a battery pack and a vehicle chassis, such as Figure 1 As shown, the automobile chassis 1 includes a chassis frame 11 and a chassis bottom plate ( 22 in the figure) covering a frame opening of the chassis frame 11 .

[0030] like Figure 4 As shown, the battery pack 2 includes a battery pack frame 21, an upper water-cooling plate 22, and a battery cell module 23. The upper water-cooling plate 22 is connected to the top of the battery pack frame 21. The battery cell module 23 is arranged inside the battery pack frame 21.

[0031] The upper side of the battery pack frame 21 is connected to the chassis frame 11 so that the upper water cooling plate 22 covers the frame opening of the chassis frame 11, thereby forming the chassis bottom plate.

[0032] The above arrangement enables the upper water-cooling plate 22 of the battery pack 2 to serve as both a temperature control structure for the battery cell module 23 and a chassis floor. Therefore, the vehicle chassis 1 no longer needs to be provided with a separate chassis floor, which simplifies the structure, improves the integration of the battery pack 2 and the vehicle chassis 1, and reduces the integrated volume of the battery pack 2 and the vehicle chassis 1. Moreover, since the upper water-cooling plate 22 is connected above the battery pack frame 21 and is supported by the battery pack frame 21, it has reliable load-bearing capacity.

[0033] In one embodiment, a sealing structure is provided between the upper side of the battery pack frame 21 and the chassis frame 11 (see Figure 4 The main sealing structure 26 is used to meet the sealing requirements of the entire vehicle. More specifically, the main sealing structure 26 can be a prefabricated sealing strip or a sealant applied during the assembly process.

[0034] In one embodiment, the battery pack frame 21 is screwed to the chassis frame 11 by threaded fasteners. More specifically, the battery pack frame 21 is provided with a connecting hole A extending vertically (see Figure 4 ), used to thread the threaded fastener.

[0035] In one embodiment, an upper sealing layer (not shown) is provided between the upper water-cooling plate 22 and the battery pack frame 21 to ensure the sealing of the interior space of the battery pack frame 21. More specifically, the upper sealing layer can be formed by applying a sealant. In this way, the upper sealing layer not only provides sealing but also acts as an adhesive. More specifically, in addition to adhesive bonding, the upper water-cooling plate 22 and the battery pack frame 21 can also be screwed together using screws 27 to ensure a secure connection.

[0036] In one embodiment, the battery pack 2 includes a lower water-cooling plate 24, which is connected to the bottom of the battery pack frame 21. The lower water-cooling plate 24 supports the battery cell module 23. This arrangement allows the lower water-cooling plate 24 of the battery pack 2 to serve as both a temperature control structure for the battery cell module 23 and a supporting structure for supporting the battery cell module 23, without the need to separately provide a tray for supporting the battery cell module 23.

[0037] In one embodiment, a lower sealing layer 25 is provided between the lower water-cooling plate 24 and the battery pack frame 21 to ensure the sealing of the interior space of the battery pack frame 21. More specifically, the lower sealing layer can be formed by applying a sealant. In this way, the lower sealing layer not only provides sealing but also acts as an adhesive. More specifically, in addition to adhesive bonding, the lower water-cooling plate 24 and the battery pack frame 21 can also be screwed together to ensure a reliable connection.

[0038] In one embodiment, Figure 5 As shown, the battery module 23 includes a battery 23a. The battery 23a is provided with a first explosion-proof valve 23b, and the first explosion-proof valve 23b is arranged on the side elevation of the battery 23a. Figure 2 As shown, the battery pack 2 includes a second explosion-proof valve 29, which is provided on the side elevation of the battery pack frame 21. More specifically, the second explosion-proof valve 29 and the side elevation of the battery pack frame 21 can be screwed together and sealed by a sealing structure.

[0039] The first explosion-proof valve 23b is set on the side elevation of the battery cell 23a, and the second explosion-proof valve 29 is connected to the side elevation of the battery pack frame 21. In this way, once the battery cell 23a or the battery pack 2 suffers thermal runaway, the thermal runaway high-temperature gas will be ejected to one side instead of being sprayed into the passenger compartment above. Moreover, when the upper water-cooling plate 22 moves downward due to the load, it will not press against the first explosion-proof valve 23b and the second explosion-proof valve 29, avoiding the risk of the first explosion-proof valve 23b and the second explosion-proof valve 29 being compressed, thereby improving the safety performance of the entire vehicle.

[0040] In one embodiment, the battery pack frame 21 includes a longitudinal beam 2101 and a transverse beam 2102 (see Figure 4 ), longitudinal beam 2101 extends longitudinally along the vehicle, while cross beam 2102 extends transversely along the vehicle. Second explosion-proof valve 29 is attached to the side elevation of cross beam 2102 of battery pack frame 21, while first explosion-proof valve 23b faces longitudinal beam 2101 of battery pack frame 21. This arrangement provides improved explosion-proof performance.

[0041] In one embodiment, the top surface area and the bottom surface area of the battery cell 23a are both larger than the area of each side surface of the battery cell 23a. For example, Figure 5In the figure, the battery cell 23a is roughly a hexahedral structure, including four side surfaces, a top surface, and a bottom surface. The area of the top surface is larger than the area of each side surface, and the area of the bottom surface is also larger than the area of each side surface. This design makes the battery cell 23a lie in a horizontal position with a large area facing upward. To ensure explosion-proof performance, the first explosion-proof valve 23b is usually set on the small area surface of the battery cell 23a. The horizontal arrangement makes the small area of the battery cell 23a stand sideways, thereby making it possible to set the first explosion-proof valve 23b on the side surface of the battery cell 23a. Moreover, the horizontal arrangement makes the contact area between the upper water-cooling plate 22 and the lower water-cooling plate 24 and the battery cell 23a larger, which is conducive to improving the temperature control efficiency of the battery cell 23a.

[0042] In one embodiment, an upper heat-conducting structure and a lower heat-conducting structure are respectively provided between the upper water-cooling plate 22 and the battery cell 23a and between the lower water-cooling plate 24 and the battery cell 23a, so as to improve the temperature control efficiency of the battery cell 23a. Figure 5 As shown, the upper heat-conducting structure and the lower heat-conducting structure are an upper heat-conducting adhesive layer 23i and a lower heat-conducting adhesive layer 23j respectively.

[0043] In one embodiment, the battery cells 23a of the battery cell module 23 are arranged in a single layer or multiple layers, and an interlayer heat conduction structure is provided between two adjacent layers of battery cells 23a. Figure 5 In the figure, the battery cells 23a are arranged in two layers, but of course not limited to two layers. An interlayer thermal conductive adhesive layer 23h is provided between the upper battery cell 23a and the lower battery cell 23a.

[0044] In one embodiment, the battery cells 23a of the same layer are arranged in multiple vertical rows, and an intermediate water cooling plate 23c is provided between two adjacent vertical rows, for example, Figure 5 In the embodiment, the battery cells 23a of the same layer are arranged in two vertical rows, but this arrangement is not limited to two rows. An intermediate water cooling plate 23c is provided between the two rows of battery cells 23a. More specifically, the intermediate water cooling plate 23c is substantially parallel to one side elevation of the battery cells 23a, while the first explosion-proof valve 23b of the battery cells 23a is provided on the side elevation opposite to the side elevation of the battery cells 23a.

[0045] The middle water-cooling plate 23c is provided so that one side surface of the battery cell 23a can also be cooled or heated. In conjunction with the upper water-cooling plate 22 and the lower water-cooling plate 24, the battery cell 23a can be cooled or heated on three sides, making the temperature control efficiency of the battery cell 23a higher and making thermal runaway less likely to occur.

[0046] In one embodiment, a heat conducting structure is provided between the intermediate water cooling plate 23c and the battery core 23a. More specifically, in the embodiment shown in the figure, Figure 5 As shown, an intermediate thermal conductive adhesive layer 23k is provided between the intermediate water cooling plate 23c and the two vertical rows of battery cells 23a.

[0047] In one embodiment, Figure 4 As shown, the battery pack 2 also includes an air intake and drainage structure 211, which may include pipes, joints, etc. The air intake and drainage structure 211 is connected to the battery pack frame 21, and specifically can be screwed to the battery pack frame 21 and sealed through a sealing structure. The air intake and drainage structure 211 is connected to the upper water-cooling plate 22, the lower water-cooling plate 24 and the middle water-cooling plate 23c, and distributes the incoming water proportionally to the upper water-cooling plate 22, the lower water-cooling plate 24 and the middle water-cooling plate 23c.

[0048] In one embodiment, Figure 5 As shown, the battery cell module 23 also includes an end plate 23f. The front and rear ends of the battery cell module 23 are bonded with the end plates 23f. When the battery cells 23a are arranged in multiple layers, each end plate 23f is simultaneously connected to the end of each layer of battery cells 23a, so that each layer of battery cells 23a becomes a whole.

[0049] In one embodiment, Figure 5 As shown, the battery module 23 also includes an integrated busbar 23e (CCS, Cells Contact System). The integrated busbar 23e and the first explosion-proof valve 23b are located on the same side of the battery cell 23a. Each vertical row of battery cells 23a corresponds to the same integrated busbar 23e. The poles of each vertical row of battery cells 23a are respectively welded to the corresponding integrated busbar 23e. The integrated busbar 23e realizes current energy transfer and temperature and voltage sampling between the battery cells 23a, thereby cooperating with the battery pack 2 control system to realize control of the battery pack 2.

[0050] In one embodiment, the battery module 23 further includes a high voltage conductive member 23d (see Figure 4 ), the high voltage conductive member 23d can be specifically a high voltage copper busbar. The battery pack 2 also includes an integrated electrical structure 28 (see Figure 1 or Figure 2 ), each cell 23a of the cell module 23 is electrically connected via a high-voltage conductive member 23d. At the same time, the cell module 23 as a whole is also electrically connected to the integrated electrical structure 28 via the high-voltage conductive member 23d. More specifically, the integrated electrical structure 28 is connected to the crossbeam 2102 of the battery pack frame 21. Specifically, the integrated electrical structure 28 can be screwed to the crossbeam 2102 of the battery pack frame 21 with a sealing structure provided therebetween.

[0051] In one embodiment, Figure 5 As shown, the battery module 23 further includes a heat insulation structure 23g, which is disposed between the battery cells 23a in the same vertical row. The heat insulation structure 23g can be a heat insulation board.

[0052] In one embodiment, Figure 4As shown, the battery pack 2 also includes a bottom guard plate 210, which is connected under the battery pack frame 21 and covers the lower water-cooling plate 24 to protect the lower water-cooling plate 24. More specifically, the bottom guard plate 210 and the battery pack frame 21 can be screwed and / or bonded.

[0053] In one embodiment, Figure 1 、 Figure 2 and Figure 6 As shown, the automobile chassis 1 also includes an upper beam 12 and a lower beam 13, and the upper beam 12 and the lower beam 13 are respectively connected to the upper and lower parts of the chassis frame 11, and the battery pack 2 is located between the upper beam 12 and the lower beam 13. More specifically, the upper beam 12 and the lower beam 13 can span the left longitudinal mounting beam 1103 and the right longitudinal mounting beam 1104 of the chassis frame 11, and the upper beam 12 and the lower beam 13 can be welded or screwed to the left longitudinal mounting beam 1103 and the right longitudinal mounting beam 1104 of the chassis frame 11. The upper beam 12 can provide a mounting base for the cabin seats, reducing the intrusion of the upper water-cooling plate 22 of the battery pack 2 when the chassis floor bears weight. The lower beam 13 can support the battery pack 2, improve the reliability of the connection between the battery pack 2 and the automobile chassis 1, and improve the strength of the entire automobile chassis 1.

[0054] In one embodiment, Figure 3 As shown, the automobile chassis 1 further includes a front subframe 14, a rear subframe 15, a front anti-collision beam 16, and a rear anti-collision beam 17. The chassis frame 11 is connected between the front subframe 14 and the rear subframe 15, and the front anti-collision beam 16 and the rear anti-collision beam 17 are respectively connected to the front side of the front cross mounting beam 1101 and the rear side of the rear cross mounting beam 1102 of the chassis frame 11.

[0055] In one embodiment, the rear transverse mounting beam 1102, the front transverse mounting beam 1101, the left longitudinal mounting beam 1103, and the right longitudinal mounting beam 1104 of the automobile chassis are welded and fixed.

[0056] The above embodiments can be freely combined without conflict.

[0057] In summary, the integrated structure of the battery pack and the automobile chassis provided in this application has the following technical effects:

[0058] (1) The upper water-cooling plate of the battery pack is used as the bottom plate of the vehicle chassis, and the lower water-cooling plate of the battery pack is used as the battery module tray, so that the battery pack and the vehicle chassis are highly integrated and the integrated volume is small, thereby reducing weight and cost.

[0059] (2) The cell explosion-proof valve (i.e., the first explosion-proof valve) is set on the side surface of the cell, and the battery pack explosion-proof valve (i.e., the second explosion-proof valve) is connected to the side surface of the battery pack frame. On the one hand, this prevents the first explosion-proof valve and the second explosion-proof valve from being crushed when the upper water-cooling plate bears weight. On the other hand, when thermal runaway occurs, the high-temperature gas will be sprayed to one side instead of upward toward the passenger compartment, thereby improving the safety performance of the entire vehicle.

[0060] (3) The battery cells are arranged in a lying position with a large area facing upward, so that the first explosion-proof valve can be set on the side surface of the battery cell. Moreover, the battery cells are in contact with the upper and lower water-cooling plates with a large area, which makes the temperature control efficiency of the battery cells high.

[0061] (4) An intermediate water-cooling plate is set between adjacent rows of battery cells, an upper water-cooling plate is set above the battery cells, and a lower water-cooling plate is set below the battery cells, so that the side, top and bottom surfaces of the battery cells can be heated or cooled. Therefore, the temperature control efficiency of the battery cells is high and thermal runaway is not prone to occur.

[0062] The principles and implementation methods of the present application have been described above using specific examples. The description of the above embodiments is only intended to help understand the method and core concept of the present application. It should be noted that for those skilled in the art, without departing from the principles of the present application, various improvements and modifications may be made to the present application, and such improvements and modifications also fall within the scope of protection of the present application.

Claims

1. An integrated structure of a battery pack and a vehicle chassis, characterized in that: The automobile chassis (1) includes a chassis frame (11) and a chassis bottom plate covering the frame opening of the chassis frame (11); the battery pack (2) includes a battery pack frame (21), an upper water-cooling plate (22) and a battery cell module (23); the battery cell module (23) is arranged inside the battery pack frame (21); the upper water-cooling plate (22) is connected above the battery pack frame (21); the upper side of the battery pack frame (21) is connected to the chassis frame (11), so that the upper water-cooling plate (22) covers the frame opening of the chassis frame (11), thereby forming the chassis bottom plate.

2. The integrated structure of the battery pack and the automobile chassis according to claim 1, characterized in that: The battery cell (23a) of the battery cell module (23) is provided with a first explosion-proof valve (23b), which is arranged on the side elevation of the battery cell (23a); the battery pack (2) includes a second explosion-proof valve (29), which is connected to the side elevation of the battery pack frame (21).

3. The integrated structure of the battery pack and the automobile chassis according to claim 2, characterized in that: The battery pack frame (21) comprises a longitudinal beam (2101) and a transverse beam (2102), the second explosion-proof valve (29) is connected to the side elevation of the transverse beam (2102) of the battery pack frame (21), and the first explosion-proof valve (23b) faces the longitudinal beam (2101) of the battery pack frame (21).

4. The integrated structure of the battery pack and the automobile chassis according to claim 2, characterized in that: The top surface area and the bottom surface area of the battery core (23a) are both larger than the area of each side elevation of the battery core (23a), so that the battery core (23a) is arranged in a lying position with a large area facing upward.

5. The integrated structure of the battery pack and the automobile chassis according to any one of claims 1 to 4, characterized in that: The battery pack (2) includes a lower water-cooling plate (24), the lower water-cooling plate (24) is connected below the battery pack frame (21), and the lower water-cooling plate (24) supports the battery cell module (23).

6. The integrated structure of the battery pack and the automobile chassis according to claim 5, characterized in that: The battery cell module (23) comprises an intermediate water cooling plate (23c), the battery cells (23a) of the battery cell module (23) are arranged in a single layer or multiple layers, the battery cells (23a) in each layer are arranged in multiple vertical rows, and the intermediate water cooling plate (23c) is arranged between two adjacent vertical rows.

7. The integrated structure of the battery pack and the automobile chassis according to claim 5, characterized in that: The battery pack (2) comprises a bottom guard plate (210), wherein the bottom guard plate (210) is connected below the battery pack frame (21) and covers the lower water cooling plate (24).

8. The integrated structure of the battery pack and the automobile chassis according to claim 5, characterized in that: A sealing structure is provided between the battery pack frame (21) and the chassis frame (11), and / or a sealing structure is provided between the upper water-cooling plate (22) and the battery pack frame (21), and / or a sealing structure is provided between the lower water-cooling plate (24) and the battery pack frame (21).

9. The integrated structure of the battery pack and the automobile chassis according to any one of claims 1 to 4, characterized in that: The automobile chassis (1) further comprises an upper beam (12) and a lower beam (13), wherein the upper beam (12) and the lower beam (13) are connected above and below the chassis frame (11), respectively, and the battery pack (2) is located between the upper beam (12) and the lower beam (13).

10. The integrated structure of the battery pack and the automobile chassis according to any one of claims 1 to 4, characterized in that: The automobile chassis (1) comprises a front subframe (14), a rear subframe (15), a front anti-collision beam (16) and a rear anti-collision beam (17); the chassis frame (11) is connected between the front subframe (14) and the rear subframe (15); the front anti-collision beam (16) and the rear anti-collision beam (17) are respectively connected to the front side and the rear side of the chassis frame (11).

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