Battery cell and lower vehicle body integrated structure and vehicle

Abstract

The utility model relates to a battery cell and lower vehicle body integrated structure and a vehicle, and relates to the technical field of automobiles. The method is used for improving the integration mode of a battery cell assembly and a lower automobile body of the new energy automobile to improve the space utilization rate of the lower automobile body. The battery cell and lower vehicle body integrated structure is used for the vehicle and comprises an installation assembly, a battery cell assembly, a front cabin and a rear floor, an installation cavity with openings in the two ends is defined by the installation assembly, and the battery cell assembly is arranged in the installation cavity. Wherein the front cabin is connected with the mounting assembly and covers one opening, the rear floor is connected with the mounting assembly and is arranged opposite to the front cabin, and the rear floor covers the other opening. Thus, the space for accommodating the battery cell assembly can be expanded in the direction close to the front cabin and the rear floor, the arrangement space of the battery cell assembly can be increased, and therefore the space utilization rate of the lower vehicle body is increased.

Description

Technical Field

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

[0002] Electric vehicles are one of the development directions of new energy vehicles, and they mainly use power batteries as the power source to drive the vehicle.

[0003] In the related technology, vehicle manufacturers usually assemble the battery cells or modules into the battery box to form a sealed battery cell assembly, and then assemble the battery cell assembly to the vehicle body by bolting. Among them, the battery cell assembly and the vehicle body are designed independently and need to meet their own strength protection requirements, and the installation area needs to be designed with sufficient space gaps to absorb manufacturing deviations to ensure that the assembly is in place without movement and contact. As a result, the utilization rate of the lower body space is too low, which not only increases the structural weight and cost of the vehicle, but also increases the space required for battery layout, sacrificing part of the vehicle space, especially the space in the length direction. Utility Model Content

[0004] The present application provides a battery cell and lower body integrated structure and a vehicle, which are used to improve the battery cell and lower body integrated structure of new energy vehicles to improve the space utilization rate of the lower body. The technical solution of the present application is as follows:

[0005] According to the first aspect of the present application, there is provided a battery cell and lower body integrated structure, which is used in a vehicle and includes a mounting assembly, a battery cell assembly, a front compartment and a rear floor, wherein the mounting assembly encloses a mounting cavity with openings at both ends, and the battery cell assembly is arranged in the mounting cavity. The front compartment is connected to the mounting assembly and covers one opening, the rear floor is connected to the mounting assembly and is arranged opposite to the front compartment, and the rear floor covers another opening.

[0006] According to the above technical means, the present application can replace part of the frame of the battery cell assembly in the related art with the front cabin and the rear floor. In this way, the space for accommodating the battery cell assembly can be expanded toward the front cabin and the rear floor, which is conducive to increasing the layout space of the battery cell assembly, thereby improving the utilization rate of the lower body space. In this way, the vehicle can be equipped with more batteries to increase the power of the vehicle, thereby improving the vehicle's cruising range.

[0007] In a possible implementation, the mounting assembly includes a cover body, a bottom guard plate, and two threshold beams. The bottom guard plate is disposed opposite to the cover body and is located at the lower side of the cover body, and the two threshold beams are disposed opposite to each other and enclose a mounting cavity with openings at both ends together with the cover body and the bottom guard plate. At least one of the cover body and the bottom guard plate is detachably connected to the two threshold beams.

[0008] According to the above technical means, the present application can open the installation cavity by separating the cover body and / or the bottom guard plate from the door sill beam, thereby facilitating the repair or replacement of the battery cell assembly.

[0009] In a possible implementation, the cover has a first cooling channel, and the first cooling channel is used to transmit cooling liquid.

[0010] According to the above technical means, the present application can perform heat exchange and cooling of the battery cell assembly by flowing the coolant in the first cooling channel, thereby solving the problem of heat generation and heat accumulation caused by the battery cell during fast charging. The first cooling channel prevents overheating of the upper part of the battery cell.

[0011] In a possible implementation, the integrated structure of the battery cell and the lower vehicle body further includes a seat crossbeam. The seat crossbeam is connected to the cover body and is located on a side of the cover body away from the bottom guard plate, and the seat crossbeam is used to install a vehicle seat.

[0012] According to the above technical means, the present application can realize the integration of the car floor and the battery cover by connecting the seat crossbeam with the cover body, thereby reducing the weight of the entire vehicle.

[0013] In a possible implementation, the underbody guard plate has a second cooling channel, and the second cooling channel is used to transmit coolant.

[0014] According to the above technical means, the present application can cool down the battery cell assembly by heat exchange by flowing the coolant in the second cooling channel, thereby solving the problem of heat accumulation caused by the battery cell generating heat during fast charging. The second cooling channel prevents the lower part of the battery cell from overheating.

[0015] In a possible implementation, the threshold beam includes: a main body and a sealing portion. The cover is located between the two main bodies of the two threshold beams, the sealing portion is connected to the main body, the sealing portion is located between the two main bodies of the two threshold beams, and the sealing portion and the cover are located on the same side of the bottom guard plate. The cover is at least partially located on a side of the sealing portion that is away from the bottom guard plate, and is in contact with a surface of the sealing portion that is away from the bottom guard plate.

[0016] According to the above technical means, the present application can seal the gap between the cover plate and the door sill beam by contacting the sealing part with the cover plate to reduce the risk of water, dust and other debris entering the installation cavity. In this way, the risk of failure of the battery cell assembly can be reduced, which is conducive to reducing the failure rate of the vehicle.

[0017] In a possible implementation, the installation assembly includes an expansion beam, which is located in the installation cavity and connected to the two door sill beams.

[0018] According to the above technical means, the present application can prevent the two threshold beams from deforming in the direction of approaching each other through the expansion beam. In this way, the side column collision performance of the vehicle can be improved, thereby improving the safety performance of the vehicle. At the same time, the expansion of the battery cell assembly can be limited, reducing the risk of damage to the battery cell assembly.

[0019] In a possible implementation, there are multiple expansion beams, and the multiple expansion beams are arranged at intervals along the extension direction of the door sill beam.

[0020] According to the above technical means, the present application can strengthen the lower body strength through multiple expansion beams, which can improve the side column collision performance of the vehicle, thereby improving the safety performance of the vehicle.

[0021] In a possible embodiment, the front cabin includes a first main body and a first cross beam. The first cross beam is arranged at the lower side of the first main body and connected to the first main body, and the first cross beam is located between two door sill beams and covers one opening; and / or the rear floor includes a second main body and a second cross beam, the second cross beam is arranged at the lower side of the second main body and connected to the second main body, and the second cross beam is located between the two door sill beams and covers another opening.

[0022] According to the above technical means, the present application can achieve the closure of the installation cavity by having the first crossbeam cover one opening and the second crossbeam cover another opening.

[0023] According to a second aspect provided by the present application, a vehicle is provided, which includes the battery mounting structure of the above-mentioned first aspect and any possible implementation manner thereof.

[0024] Therefore, the above technical features of the present application have the following beneficial effects:

[0025] (1) The front compartment and rear floor can replace part of the frame of the battery cell assembly in the related art. In this way, the space for accommodating the battery cell assembly can be expanded toward the front compartment and rear floor, which is conducive to increasing the layout space of the battery cell assembly, thereby improving the utilization rate of the lower body space. In this way, the vehicle can be equipped with more battery cells to increase the vehicle's power, thereby increasing the vehicle's cruising range.

[0026] (2) The cover and / or the bottom guard plate can be separated from the door sill beam to open the installation cavity, thereby facilitating the repair or replacement of the battery cell assembly.

[0027] (3) The coolant can flow in the first cooling channel and the second cooling channel to exchange heat and cool the battery cell assembly, thereby solving the problem of heat accumulation caused by the battery cell generating heat during fast charging.

[0028] (4) The seat crossbeam can be connected to the cover to achieve integration of the vehicle floor and the battery cover, thus reducing the weight of the entire vehicle.

[0029] (5) The sealing portion can be in contact with the cover plate to seal the gap between the cover plate and the door sill beam, thereby reducing the risk of water, dust and other debris entering the installation cavity. In this way, the risk of failure of the battery cell assembly can be reduced, which is conducive to reducing the failure rate of the vehicle.

[0030] (6) The expansion beam can prevent the two sill beams from deforming in the direction of approaching each other. In this way, the side column collision performance of the vehicle can be improved, thereby improving the safety performance of the vehicle. At the same time, the expansion of the battery cell assembly can be limited, reducing the risk of damage to the battery cell assembly.

[0031] It should be noted that the technical effects brought about by the second aspect can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here.

[0032] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0034] Figure 1 It is a structural schematic diagram of a battery pack and a vehicle body provided by the relevant technology;

[0035] Figure 2 It is a schematic diagram of an integrated structure of a battery pack and a vehicle body provided by the relevant technology;

[0036] Figure 3 It is a schematic diagram of the integrated structure of the battery cell and the lower vehicle body provided in some embodiments of the present application;

[0037] Figure 4 is an exploded schematic diagram of an integrated structure of a battery cell and a lower vehicle body provided in some embodiments of the present application;

[0038] Figure 5 It is a schematic diagram of the structure of a battery cell assembly and a battery cell provided in some embodiments of the present application;

[0039] Figure 6 This is one of the partial structural schematic diagrams of the integrated structure of the battery cell and the lower vehicle body provided in some embodiments of the present application;

[0040] Figure 7 is a schematic diagram of installing a seat crossbeam provided in some embodiments of the present application;

[0041] Figure 8This is the second partial structural schematic diagram of the integrated structure of the battery cell and the lower vehicle body provided in some embodiments of the present application;

[0042] Fig. 9 This is the third partial structural schematic diagram of the integrated structure of the battery cell and the lower body provided in some embodiments of the present application.

[0043] Reference numerals:

[0044] 100-installation component; 101-installation cavity; 102-opening;

[0045] 1-cover body; 11-first cooling channel;

[0046] 2-sill beam; 21-body; 211-accommodating cavity; 22-sealing part; 23-connecting part;

[0047] 3-bottom guard plate; 31-second cooling channel; 32-supporting portion; 33-recessed portion; 34-installing portion;

[0048] 4-Expansion beam;

[0049] 200-front cabin; 201-first main body; 202-first cross beam;

[0050] 300-rear floor; 301-second main body; 302-second cross beam;

[0051] 400-cell assembly;

[0052] 500-seat crossbar;

[0053] 600-Air conditioning pipe. DETAILED DESCRIPTION

[0054] In order to enable ordinary persons in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0055] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0056] Electric vehicles are one of the development directions of new energy vehicles, and they mainly use power batteries as the power source to drive the vehicle.

[0057] Currently, see Figure 1 , Figure 1 It is a structural diagram of a battery pack 01 and a vehicle body 02 provided by the relevant technology. The vehicle manufacturer usually assembles the battery cells or modules into the battery box to form a sealed battery pack 01, and then assembles the battery pack to the vehicle body 02 by bolting. Among them, the battery pack 01 and the vehicle body 02 are designed independently and need to meet their own strength protection requirements, and sufficient space gaps need to be designed in the installation area to absorb manufacturing deviations to ensure that the assembly is in place without movement and contact. As a result, the utilization rate of the lower body space is too low, which not only increases the structural weight and cost of the vehicle, but also increases the space required for battery layout, sacrificing part of the vehicle space, especially the space in the direction of vehicle height.

[0058] like Figure 2 As shown, Figure 2 It is a schematic diagram of the integrated structure of a battery pack and a vehicle body provided by the related technology. The related technology also provides a cell to vehicle (CTV) structure battery pack and vehicle integration solution. Among them, the battery box cover 03 is integrated with the seat 04, the seat mounting bracket 05, the passenger compartment floor 06, and the interior decoration. When the battery system fails, it has a huge impact on the interior of the passenger compartment. The seat 04, the passenger compartment floor 06, the interior decoration, and the battery box cover 03 need to be removed before the internal maintenance diagnosis and replacement of parts of the battery box are carried out. Part of the battery box cover 03 needs to be destructively disassembled before targeted maintenance can be carried out, which brings great difficulties and inconvenience to the maintenance of the battery system.

[0059] In addition, the integrated structure of the battery cell and the battery box is currently mostly bonded with thermally conductive structural adhesive. After the thermally conductive structural adhesive is cured, the battery cell and the battery box cannot be replaced or maintained except by freezing or applying a debonding agent. The service life of the battery cell will be seriously affected or even scrapped if the freezing solution is adopted. Similarly, applying a debonding agent will cause irreversible damage to the blue film of the battery cell, and it is difficult to maintain and replace a single battery cell.

[0060] Based on this, the present application provides a vehicle for improving the battery integration method of new energy vehicles to improve the utilization rate of the lower body space. The vehicle can be a pure electric vehicle or a hybrid vehicle.

[0061] For ease of understanding, the vehicle provided in this application is specifically introduced below with reference to the accompanying drawings.

[0062] like Figure 3 As shown, Figure 3Schematic diagram of the integrated structure of the battery cell and the lower body provided in some embodiments of the present application. The vehicle includes the integrated structure of the battery cell and the lower body. It should be noted that in the vehicle, the front cabin 200 and the rear floor 300 are part of the lower body of the vehicle. In the present application, the integrated structure of the battery cell and the lower body can be understood by those skilled in the art as the integrated structure of the battery cell and the front cabin 200, the rear floor 300 and other components.

[0063] like Figure 4 As shown, Figure 4 1 is an exploded schematic diagram of an integrated structure of a battery cell and a lower body provided in some embodiments of the present application, wherein the integrated structure of a battery cell and a lower body comprises a mounting assembly 100 and a battery cell assembly 400. The mounting assembly 100 forms a mounting cavity 101 with openings 102 at both ends, that is, the mounting cavity 101 provides space for the installation of the battery cell assembly 400, and the battery cell assembly 400 is arranged in the mounting cavity 101.

[0064] The battery cell assembly 400 includes a plurality of battery cells, which can be used to provide electrical energy to the vehicle and is the power source of the vehicle.

[0065] The integrated structure of the battery cell and the lower vehicle body further includes a front compartment 200 , which is connected to the mounting assembly 100 and covers an opening 102 .

[0066] The integrated structure of the battery cell and the lower vehicle body further includes a rear floor 300 , which is connected to the mounting assembly 100 and covers another opening 102 .

[0067] In this way, the installation assembly 100 , the front compartment 200 and the rear floor 300 enclose a closed space, namely the installation cavity 101 , for accommodating the battery cell assembly 400 .

[0068] In this way, the front compartment 200 and the rear floor 300 can replace part of the frame of the battery pack in the related art. In this way, the space for accommodating the battery cell assembly 400 can be expanded in the direction close to the front compartment 200 and the rear floor 300. The direction of the front compartment 200 and the rear floor 300 is the length direction of the vehicle. This is conducive to increasing the layout space of the battery cell assembly 400, thereby improving the utilization rate of the lower body space. In this way, the vehicle can be equipped with more batteries to increase the power of the vehicle, thereby improving the vehicle's cruising range.

[0069] Continue to see Figure 4 In some embodiments, the mounting assembly 100 includes a cover body 1 and a bottom guard plate 3. The bottom guard plate 3 is disposed opposite to the cover body 1 and is located at the lower side of the cover body 1, so that the mounting cavity 101 is located between the cover body 1 and the bottom guard plate 3.

[0070] In some embodiments, the mounting assembly 100 includes two sill beams 2. The two sill beams 2 are arranged opposite to each other, so that the mounting cavity 101 is located between the two sill beams 2, and the sill beams 2 are installed opposite to each other in the vehicle width direction.

[0071] In some embodiments, at least one of the cover body 1 and the bottom guard plate 3 is detachably connected to the two threshold beams 2. The cover body 1 and the bottom guard plate 3 are connected to the two threshold beams 2 by bolt connection, riveting, etc., which can be selected according to actual conditions, and this application does not make specific limitations on this.

[0072] In this way, it is convenient to separate at least one of the cover body 1 and the bottom guard plate 3 from the door sill beam 2 so as to replace and repair the battery cell assembly 400 .

[0073] like Figure 5 As shown, Figure 5 1 is a schematic diagram of the structure of the battery cell assembly and the battery cell provided in some embodiments of the present application. The cover 1 has a first cooling channel 11, and the first cooling channel 11 is used to transmit the coolant. It should be noted that the first cooling channel 11 can be connected to the vehicle coolant flow pipeline.

[0074] It is understandable that the coolant can flow in the first cooling channel 11, and then exchange heat with the battery cell assembly 400 through the cover 1, so as to take away the heat generated during the operation of the battery cell assembly 400. In this way, the heat dissipation efficiency of the battery cell assembly 400 can be improved, and the risk of failure of the battery cell assembly 400 can be reduced.

[0075] Exemplarily, the cover 1 is in contact with the battery cell assembly 400. In this way, the heat dissipation efficiency of the battery cell assembly 400 can be further improved.

[0076] Exemplarily, the cover 1 is detachably connected to the battery cell assembly 400, so that the battery cell can be removed from the cover 1 for maintenance and replacement. At the same time, the cover 1 can provide support for the installation of the battery cell assembly 400, which is conducive to improving the stability of the installation of the battery cell assembly 400.

[0077] Illustratively, the cover 1 may be in contact with the battery cell assembly 400 .

[0078] Continue to see Figure 5 In some embodiments, the bottom guard plate 3 has a second cooling channel 31, and the second cooling channel 31 is used to transmit coolant. It should be noted that the second cooling channel 31 can be connected to the vehicle coolant flow pipeline.

[0079] It is understandable that the coolant can flow in the second cooling channel 31, and then exchange heat with the battery cell assembly 400 through the bottom guard plate 3, so as to take away the heat generated by the working process of the battery cell assembly 400. In this way, the heat dissipation efficiency of the battery cell assembly 400 can be improved, and the risk of failure of the battery cell assembly 400 can be reduced.

[0080] Exemplarily, the bottom guard plate 3 is in contact with the battery cell assembly 400. In this way, on the one hand, the heat dissipation efficiency of the battery cell assembly 400 can be further improved, and on the other hand, the bottom guard plate 3 can provide support for the battery cell assembly 400, which is conducive to improving the stability of the installation of the battery cell assembly 400.

[0081] Exemplarily, the bottom guard plate 3 may be in contact with the battery cell assembly 400 .

[0082] like Figure 6 As shown, Figure 6 1 is one of the partial structural diagrams of the integrated structure of the battery cell and the lower body provided in some embodiments of the present application. The integrated structure of the battery cell and the lower body also includes a seat crossbeam 500. The seat crossbeam 500 is connected to the cover body 1 and is located at the cover body 1 away from the bottom guard plate 3 (see Figure 4 ) on one side, the seat crossbar 500 is used to install the vehicle seat.

[0083] It is understood that the seat crossbar 500 can improve the mounting assembly 100 (see Figure 4 )'s structural strength, in this way, the mounting assembly 100 can provide more reliable protection for the battery cell assembly 400, which is beneficial to improving the safety of the vehicle.

[0084] Similarly, it can be understood that the cover 1 is a part of the mounting cavity 101 and is also used to mount the seat cross beam 500. Compared with the related art in which the battery cover and the floor for mounting the seat cross beam 500 are different components, it can save space in the vehicle height direction, which is conducive to increasing the layout space of the battery cell assembly 400, thereby improving the utilization rate of the lower vehicle body space. In this way, the vehicle can be equipped with more battery cells to increase the vehicle's power, thereby improving the vehicle's cruising range.

[0085] At the same time, the vehicle floor and the battery cover are integrated into the cover body 1, which can reduce the weight of the vehicle body.

[0086] like Figure 7 As shown, Figure 7 Schematic diagram of the installation of the seat crossbeam provided in some embodiments of the present application. For example, the seat crossbeam 500 is arranged along two threshold beams 2 (see Figure 4 In this way, the deformation difficulty of the mounting assembly 100 in the arrangement direction of the two sill beams 2 can be increased, thereby further improving the side column collision performance of the vehicle, and further improving the safety performance of the vehicle.

[0087] like Figure 8 As shown, in some embodiments, the door sill beam 2 includes a body portion 21 and a sealing portion 22. The sealing portion 22 is connected to the body portion 21, and the sealing portion 22 is located between the two body portions 21 of the two door sill beams 2, wherein the cover body 1 is located between the two body portions 21 of the two door sill beams 2, and the sealing portion 22 and the cover body 1 are located on the same side of the bottom guard plate 3. Among them, the cover body 1 is at least partially located on the side of the sealing portion 22 away from the bottom guard plate 3, and contacts the surface of the sealing portion 22 away from the bottom guard plate 3.

[0088] In this way, the sealing portion 22 can be in contact with the surface of the cover 1, so that the gap between the cover 1 and the door sill beam 2 is sealed, which can reduce the risk of debris such as water and dust entering the installation cavity 101. In this way, the risk of failure of the battery cell assembly 400 can be reduced, which is conducive to reducing the failure rate of the vehicle.

[0089] It should be noted that the main body 21 and the sealing portion 22 can be integrally formed. In this way, the structural strength of the sill beam 2 can be improved, thereby improving the side column collision performance of the vehicle, and further improving the safety performance of the vehicle.

[0090] The main body 21 may be either a solid structure or a hollow structure, and the specific structure may be selected according to actual conditions, and this application does not make any specific limitation on this.

[0091] For example, Figure 8 As shown, the main body 21 is a hollow structure. This is conducive to reducing the weight of the vehicle, thereby reducing the vehicle's energy consumption and increasing the vehicle's cruising range. In addition, the hollow structure can also buffer collisions, which is conducive to improving the safety performance of the vehicle.

[0092] In this case, the main body 21 has a receiving cavity 211. The number of the receiving cavity 211 can be one or more, which can be selected according to actual conditions, and the present application does not make specific restrictions on this. For example, the number of the receiving cavity 211 is more than one.

[0093] It should be noted that the vehicle may further include an air conditioning pipe 600, which is disposed in the accommodating chamber 211. The air conditioning pipe 600 is used to transmit refrigerant so that the air conditioning system of the vehicle can operate normally, thereby realizing cooling or heating of the interior space of the vehicle and providing a comfortable driving environment for the passengers.

[0094] It is understandable that arranging the air conditioning duct 600 in the accommodating cavity 211 of the main body 21 can reduce the space occupied by the air conditioning duct 600 for arranging the battery cell assembly 400, which is beneficial to further improve the utilization rate of the lower body space.

[0095] In some embodiments, Figure 8As shown, the door sill beam 2 further includes a connecting portion 23. The connecting portion 23 is located on a side of the main body 21 close to the bottom guard plate 3 and is connected to the main body 21. The connecting portion 23 can be integrally formed with the main body 21.

[0096] On this basis, the end of the bottom guard plate 3 close to the door sill beam 2 is located on the side of the connection portion 23 away from the main body 21, and the end of the bottom guard plate 3 close to the door sill beam 2 is connected to the connection portion 23. In other words, the end of the bottom guard plate 3 close to the door sill beam 2 is located at the lower side of the connection portion 23 and is connected to the connection portion 23. The bottom guard plate 3 can be connected to the connection portion 23 by bolt connection, snap connection, riveting, etc.

[0097] Arranged in this way, it is convenient to remove the bottom guard plate 3 from the door sill beam 2 so as to repair or replace the battery cell assembly 400 in the installation cavity 101 .

[0098] Continue to see Figure 8 Exemplarily, the bottom guard plate 3 includes a support portion 32, two recessed portions 33 and two mounting portions 34. Along the arrangement direction of the two door sill beams 2, the support portion 32 is located between the two recessed portions 33, and the support portion 32 is connected to the two recessed portions 33. The recessed portion 33 is recessed relative to the support portion 32 toward the direction close to the cover body 1, and a groove is formed. Along the arrangement direction of the two door sill beams 2, the two recessed portions 33 are located between the two mounting portions 34, and each mounting portion 34 is connected to an adjacent recessed portion 33. The mounting portion 34 is located on the side of the connecting portion 23 away from the main body portion 21, and is connected to the connecting portion 23. On this basis, the battery cell assembly is arranged on the support portion 32.

[0099] It should be noted that the vehicle may also include a brake line and a wiring harness (not shown in the figure). The brake line is used to transmit the brake medium, for example, the brake line is used to transmit the brake fluid. The wiring harness is used to connect the battery cell assembly 400 and the vehicle components to achieve the transmission of electric energy and data signals.

[0100] Among them, the brake pipe and the wiring harness can be arranged to be connected to the bottom guard plate 3, and the brake pipe and the wiring harness can be arranged in the groove. In this way, the occupation of the brake pipe and the wiring harness on the arrangement space of the battery core assembly can be reduced, which is conducive to further improving the utilization rate of the lower body space.

[0101] like Fig. 9 As shown, Fig. 9 This is the third partial structural diagram of the integrated structure of the battery cell and the lower vehicle body provided in some embodiments of the present application. The mounting assembly 100 includes at least one expansion beam 4. The expansion beam 4 is located in the mounting cavity 101 and connected to the two door sill beams 2.

[0102] It can be understood that the two threshold beams 2 are arranged at intervals, and the expansion beam 4 is connected to the two threshold beams 2. The threshold beam 2 can divide the installation cavity 101 into two parts, and the battery cell assembly 400 can also be divided into two parts. When one part of the battery cells swells, the expansion beam 4 can prevent the battery cells from further expanding and squeeze and destroy the battery cells without faults.

[0103] The expansion beam 4 can prevent the two sill beams 2 from deforming in the direction of approaching each other. In this way, the side column collision performance of the vehicle can be improved, thereby improving the safety performance of the vehicle. At the same time, the expansion of the battery cell assembly 400 can be limited, reducing the risk of damage to the battery cell assembly 400.

[0104] Continue to see Figure 6 For example, the expansion beam 4 can be arranged at a position opposite to the seat cross beam 500, that is, the expansion beam 4 is arranged symmetrically with the seat cross beam 500 about the cover body 1. In this way, the strength of the lower body can be further enhanced.

[0105] Continue to see Fig. 9 , illustratively, a plurality of expansion beams 4 are provided. The plurality of expansion beams 4 are arranged at intervals along the extension direction of the door sill beam 2 , and the plurality of expansion beams 4 can further improve the structural strength of the cover body 1 .

[0106] In the case where there are multiple expansion groups, the installation cavity 101 can be divided into multiple sub-cavities, and the battery cell assembly 400 can be arranged in the sub-cavities. The battery cells in the sub-cavities can be used as separate modules. When the battery cells fail and need to be replaced, the battery cells in the separate modules can be replaced, thereby reducing waste.

[0107] Continue to see Fig. 9 In some embodiments, the front cabin 200 includes a first main body 201 and a first cross beam 202. The first cross beam 202 is disposed at the lower side of the first main body 201 and connected to the first main body 201. Meanwhile, the first cross beam 202 is located between two door sill beams 2 and covers an opening 102.

[0108] The first main body portion 201 is connected to other lower body structures of the vehicle.

[0109] When the vehicle is hit from the side, the first cross beam 202 is located between the two sill beams 2 , which can prevent the two sill beams 2 from deforming in a direction of approaching each other.

[0110] In some embodiments, the rear floor 300 includes a second main body 301 and a second cross beam 302. The second cross beam 302 is disposed at the lower side of the second main body 301 and connected to the second main body 301. Meanwhile, the second cross beam 302 is located between the two door sill beams 2 and covers another opening 102.

[0111] The second main body portion 301 is connected to other lower body structures of the vehicle.

[0112] When the vehicle is hit from the side, the second cross beam 302 is located between the two sill beams 2 , which can prevent the two sill beams 2 from deforming in a direction of approaching each other.

[0113] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A battery cell and lower body integrated structure for a vehicle, characterized in that: include: A mounting assembly (100) encloses a mounting cavity (101) having openings (102) at both ends; A battery cell assembly (400) is arranged in the installation cavity (101); A front compartment (200), connected to the mounting assembly (100) and covering one of the openings (102); a rear floor (300) connected to the mounting assembly (100) and arranged opposite to the front compartment (200); the rear floor (300) covers the other opening (102); The installation assembly (100) comprises: A cover body (1), the cover body (1) having a first cooling channel (11), the first cooling channel (11) being used for transmitting a cooling liquid; A bottom guard plate (3) is arranged opposite to the cover body (1) and is located on the lower side of the cover body (1); Two sill beams (2), the two sill beams (2) being arranged opposite to each other and, together with the cover body (1) and the bottom guard plate (3), enclosing a mounting cavity (101) having openings (102) at both ends; Wherein, at least one of the cover body (1) and the bottom guard plate (3) is detachably connected to the two door sill beams (2).

2. The battery cell and lower body integrated structure according to claim 1, characterized in that: Also includes: A seat crossbeam (500) is connected to the cover body (1) and is located on a side of the cover body (1) facing away from the bottom guard plate (3); the seat crossbeam (500) is used for installing a vehicle seat.

3. The battery cell and lower body integrated structure according to claim 1, characterized in that: The bottom guard plate (3) has a second cooling channel (31), and the second cooling channel (31) is used for transmitting cooling liquid.

4. The battery cell and lower body integrated structure according to claim 1, characterized in that: The threshold beam (2) comprises: A main body portion (21), wherein the cover body (1) is located between the two main body portions (21) of the two door sill beams (2); a sealing portion (22) connected to the main body portion (21); the sealing portion (22) is located between the two main body portions (21) of the two door sill beams (2), and the sealing portion (22) and the cover body (1) are located on the same side of the bottom guard plate (3); Wherein, the cover body (1) is at least partially located on a side of the sealing portion (22) facing away from the bottom guard plate (3), and is in contact with a surface of the sealing portion (22) facing away from the bottom guard plate (3).

5. The battery cell and lower body integrated structure according to claim 1, characterized in that: The installation assembly (100) comprises: An expansion beam (4) is located in the installation cavity (101) and is connected to the two threshold beams (2).

6. The battery cell and lower body integrated structure according to claim 5, characterized in that: The number of the expansion beams (4) is multiple, and the multiple expansion beams (4) are arranged at intervals along the extension direction of the door sill beam (2).

7. The battery cell and lower body integrated structure according to any one of claims 1 to 6, characterized in that: The front cabin (200) comprises: A first main body (201); A first cross beam (202) is disposed on the lower side of the first main body (201) and connected to the first main body (201); the first cross beam (202) is located between the two threshold beams (2) and covers one of the openings (102); And / or, the rear floor (300) comprises: A second main body (301); The second cross beam (302) is arranged at the lower side of the second main body (301) and connected to the second main body (301); the second cross beam (302) is located between the two threshold beams (2) and covers the other opening (102).

8. A vehicle, characterized in that: The invention comprises the integrated structure of the battery cell and the lower vehicle body according to any one of claims 1 to 7.

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