Vehicle power battery pack and vehicle body integrated structure and vehicle

Abstract

The present application relates to a vehicle power battery pack and vehicle body integrated structure and a vehicle. The power battery pack and vehicle body integrated structure includes a floor frame and a power battery pack mounted on the floor frame; wherein the power battery pack includes a battery box having an internal storage space and a battery cell arranged in the internal storage space, the battery box has a top plate and a bottom plate along the height direction of the vehicle, and the battery cell is arranged between the top plate and the bottom plate; wherein the floor frame is provided with an opening, the battery box is installed at the opening of the floor frame, so that the top plate forms the vehicle body floor. The solution provided in the embodiment of the present application can reduce the structural redundancy between the battery box and the vehicle body and reduce the weight of the entire vehicle.

Description

Technical Field

[0001] The present application relates to vehicle technology, and more particularly to a vehicle power battery pack and vehicle body integrated structure and a vehicle. Background Art

[0002] With the development of new energy technologies, electric vehicles have gradually become popular. Since the weight of electric vehicles is the main factor affecting their range, the lightweighting of electric vehicles has gradually attracted the attention of more and more automobile companies and users.

[0003] The power battery pack is the main component of an electric vehicle. In related technologies, the power battery pack of an electric vehicle generally has a complete upper shell and a lower shell, which together form a closed battery box structure, and then are installed on the vehicle as an independent whole as an accessory of the vehicle. Such a structure leads to structural redundancy between the battery box and the vehicle body. Summary of the invention

[0004] In order to solve or partially solve the problems existing in the related art, the present application provides a power battery pack and vehicle body integrated structure and a vehicle, which can reduce the structural redundancy between the battery box and the vehicle body, thereby reducing the weight and cost of the entire vehicle.

[0005] The first aspect of the present application provides a vehicle power battery pack and vehicle body integrated structure, including:

[0006] A floor frame and a power battery pack mounted on the floor frame;

[0007] The power battery pack includes a battery box having an internal accommodation space and a battery cell arranged in the internal accommodation space, the battery box having a top plate and a bottom plate along the height direction of the vehicle, and the battery cell is arranged between the top plate and the bottom plate;

[0008] The floor frame is provided with an opening, and the battery box is installed at the opening of the floor frame, so that the top plate forms the body floor of the vehicle.

[0009] In one embodiment, the battery box includes an upper box and a lower box fixed relative to each other along the height direction, the upper box has the top plate, the lower box has the bottom plate, and the upper box and the lower box together define the internal accommodation space;

[0010] The lower box is fixedly mounted on the floor frame.

[0011] In one embodiment, the upper box and the lower box are fixedly mounted on the floor frame by the same fastener; or

[0012] The upper box is fixedly mounted on the lower box and abuts against the floor frame; or

[0013] The upper box body is fixedly mounted on the lower box body and does not contact the floor frame.

[0014] In one embodiment, the top plate at least partially extends into the opening along the height direction.

[0015] In one embodiment, a mounting protrusion for mounting components in the passenger compartment of the vehicle is provided on a side of the top plate facing away from the battery cell.

[0016] In one embodiment, the roof panel is provided with a reinforcing beam extending between two sides in the width direction of the vehicle;

[0017] The reinforcing beam is arranged on a side of the top plate away from the battery core, and the reinforcing beam is provided with at least one mounting protrusion for mounting a preset component in the vehicle body.

[0018] In one embodiment, the lower box body has a flange extending from the outer peripheral wall in the horizontal direction, and the flange is provided with a plurality of spaced connection portions;

[0019] The floor frame includes mounting beams located on both sides of the vehicle in the width direction, the opening is formed between the mounting beams on both sides, a connecting surface is formed at the bottom of the mounting beam, the lower box is fixedly mounted on the floor frame at the connecting portion by fasteners, and the connecting portion is tightly attached to the connecting surface.

[0020] In one embodiment, the floor frame is a sheet metal welded part, a profile part, a composite material part or a cast aluminum part; and / or,

[0021] The lower box body is a profile molded part or a cast aluminum molded part; and / or,

[0022] The upper box body is a sheet metal welded part, a composite material part or a cast aluminum part.

[0023] In one embodiment, the top plate and the bottom plate are made of different materials, and the material strength of the top plate is higher than that of the bottom plate; and / or,

[0024] The structural strength of the top plate is higher than that of the bottom plate, including: the thickness of the top plate is greater than the thickness of the bottom plate, and / or the top plate is formed with a reinforcement structure. A second aspect of the present application provides a vehicle, including: including the above-mentioned power battery pack and vehicle body integrated structure.

[0025] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0026] In some embodiments, the battery box is arranged at the opening of the floor frame, and the top plate of the battery box constitutes the floor of the vehicle body. With this arrangement, there is no need to provide a vehicle body floor in addition to the top plate of the battery box, thereby avoiding structural redundancy between the top plate of the battery box and the vehicle body floor. In addition, the battery box is directly fixed to the floor frame of the vehicle body, and there is no need to provide a longitudinal beam or cross beam for mounting the battery box in addition to the floor frame. While ensuring the connection strength between the battery box and the vehicle body, the structural redundancy between the battery box and the longitudinal and cross beams of the vehicle body is avoided. Therefore, the embodiments of the present application can reduce the structural redundancy between the battery box and the vehicle body, thereby reducing the weight and cost of the entire vehicle.

[0027] In addition, the top plate of the battery box constitutes the floor of the vehicle body, making the power battery pack as part of the vehicle structure, which can improve the integration of the power battery pack and the vehicle structure. In addition, by reducing the structural redundancy between the battery box and the vehicle body, the space in the height direction of the vehicle can be saved. When the size of the vehicle remains unchanged, the internal storage space of the power battery pack can be increased, and larger capacity batteries can be arranged, thereby increasing the vehicle's cruising range.

[0028] 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

[0029] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0030] Figure 1 is a schematic diagram of the structure of a power battery pack shown in an embodiment of the present application;

[0031] Figure 2 is a schematic structural diagram of a floor frame shown in an embodiment of the present application;

[0032] Figure 3 It is a schematic diagram of the structure of the power battery pack and the floor frame after being assembled according to an embodiment of the present application.

[0033] Reference numerals: power battery pack 10 ; battery box 11 ; upper box 111 ; lower box 112 ; top plate 12 ; reinforcing beam 13 ; mounting boss 14 ; vehicle body 20 ; floor frame 21 ; opening 22 . DETAILED DESCRIPTION

[0034] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0035] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0036] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0039] Please also see Figures 1 to 3An embodiment of the present application provides an integrated structure of a power battery pack and a vehicle body of a vehicle, including a floor frame 21 and a power battery pack 10 mounted on the floor frame 21; wherein the power battery pack 10 includes a battery case 11 having an internal accommodating space and a battery cell arranged in the internal accommodating space, the battery case 11 has a top plate 12 and a bottom plate (not shown) along the height direction of the vehicle, and the battery cell is arranged between the top plate 12 and the bottom plate; wherein the floor frame 21 is provided with an opening 22, and the battery case 11 is installed at the opening 22 of the floor frame 21, so that the top plate 12 forms the vehicle body floor.

[0040] In this embodiment, the battery box 11 is arranged at the opening 22 of the floor frame 21, and the top plate 12 of the battery box 11 constitutes the floor of the vehicle body 20. With this arrangement, there is no need to provide a vehicle body floor in addition to the top plate of the battery box, thereby avoiding structural redundancy between the top plate of the battery box and the vehicle body floor. In addition, the battery box 11 is directly fixed to the floor frame 21 of the vehicle body 20, and there is no need to provide a longitudinal beam or a cross beam for mounting the battery box outside the floor frame. While ensuring the connection strength between the battery box 11 and the vehicle body 20, the structural redundancy between the battery box and the longitudinal and cross beams of the vehicle body is avoided. Therefore, the embodiment of the present application can reduce the structural redundancy between the battery box and the vehicle body, thereby reducing the weight and cost of the entire vehicle.

[0041] In addition, the top plate 12 of the battery box 11 constitutes the floor of the vehicle body 20, so that the power battery pack 10 is a part of the vehicle structure, which can improve the integration of the power battery pack 10 and the vehicle structure. In addition, by reducing the structural redundancy between the battery box and the vehicle body, the space in the height direction of the vehicle can be saved. When the size of the vehicle remains unchanged, the internal accommodation space of the power battery pack 10 can be increased, and a larger capacity battery cell can be arranged, thereby increasing the vehicle's cruising range.

[0042] In some embodiments, the battery box 11 includes an upper box 111 and a lower box 112 fixed relative to each other along the height direction of the vehicle, the upper box 111 has a top plate 12, the lower box 112 has a bottom plate, and the upper box 111 and the lower box 112 jointly define an internal accommodating space. The battery box 11 is fixedly mounted on the floor frame 21 via the lower box 112. After such a configuration, the internal structural parts and functional components of the power battery pack 10 can be maintained by removing the lower box 112, and the maintenance is more convenient; in addition, since the lower box 112 of the battery box 11 is directly fixed to the floor frame 21, the overall installation stability of the power battery pack 10 on the vehicle body is better, which can improve the structural strength and safety of the entire vehicle.

[0043] In addition, the technical solution of this embodiment can improve the integration of the power battery pack and the vehicle body with relatively minor changes to the structure of the power battery pack and the vehicle body structure in the related technology, can make full use of the original vehicle body structure and the structure of the power battery pack, and can implement the embodiment of this application with relatively minor changes to the existing processes and production lines.

[0044] In some embodiments, the upper box 111 and the lower box 112 are fixedly mounted on the floor frame 21 by the same fastener (such as bolts, screws, pins, etc.). In this arrangement, the upper box 111 and the lower box 112 can be simultaneously disassembled and assembled by disassembling and assembling the same fastener, which makes disassembly and assembly easier and maintenance more convenient.

[0045] In some embodiments, the upper box 111 is fixedly mounted on the lower box 112 and abuts against the floor frame 21. After such arrangement, the upper box 111 can be stably positioned between the lower box 112 and the floor frame 21, thereby ensuring the position stability between the top plate 12 of the upper box 111 and the floor frame 21.

[0046] In some embodiments, the upper box 111 is fixedly mounted on the lower box 112 and does not contact the floor frame 21. After such arrangement, since the upper box 111 is supported by the lower box 112 and has no connection force constraint with the floor frame 21, when the top plate 12 of the upper box 111 is subjected to a load, the pressure of the upper box 111 can be transmitted to the lower box 112, so that the upper box 111 and the lower box 112 have better bonding stability, thereby ensuring better sealing between the upper box 111 and the lower box 112.

[0047] In some embodiments, along the height direction of the vehicle body 20, the top plate 12 of the upper box body 111 at least partially extends into the opening 22 and abuts against the floor frame 21. In this way, the height space of the vehicle can be fully utilized, making the structure more compact and improving the space utilization rate of the whole vehicle. Moreover, since the top plate 12 abuts against the floor frame 21 in the opening 22, the floor frame 21 has a position limiting effect on the top plate 12 in the horizontal direction, thereby improving the stability of the connection between the top plate 12 and the floor frame 21.

[0048] In one embodiment, the lower box 112 has a flange extending from the outer wall in the horizontal direction, and the flange is provided with a plurality of spaced connection parts (such as connection holes or grooves); the floor frame 21 includes mounting beams located on both sides of the width direction of the vehicle, and an opening 22 is formed between the mounting beams on both sides, and a connection surface is formed at the bottom of the mounting beam. After the lower box 112 is fixed to the floor frame at the connection part by fasteners, the connection part of the flange is tightly attached to the connection surface of the floor frame 21. In this way, the sealing effect of the battery box 11 on the passenger compartment can be ensured. It can be understood that in some embodiments, the connection part of the flange and the connection surface of the floor frame 21 can be sealed by a sealant or a sealant, thereby improving the sealing effect of the battery box 11 on the passenger compartment.

[0049] In some embodiments, the top plate 12 is provided with a reinforcing beam 13 extending between both sides in the width direction of the vehicle; the reinforcing beam 13 can be provided on the side of the top plate 12 away from the battery cell. By providing the reinforcing beam 13, the top plate 12 can have better load bearing performance as a vehicle body structural member. In addition, the reinforcing beam 13 improves the structural strength of both sides of the top plate 12 along the width direction of the vehicle. When the vehicle is hit from the side, the reinforcing beam 13 can provide the vehicle with resistance in the width direction, reducing the risk of damage to the battery box 11 and the vehicle body 20.

[0050] In some embodiments, at least one mounting protrusion 14 for mounting components in the passenger compartment is provided on the side of the top plate 12 facing away from the battery cell. By providing the mounting protrusion 14, components in the passenger compartment (such as seats, carpets, or wiring harnesses, etc.) can be directly fixed to the top plate 12, simplifying the structure of the vehicle body 20, reducing the number of vehicle body structural parts, and reducing the weight of the entire vehicle.

[0051] In some embodiments, the passenger compartment inner component includes at least a seat component, and the mounting protrusion 14 includes at least a seat mounting beam. In some embodiments, the mounting protrusion 14 can be integrally formed with the top plate 12, or can be fixed to the top plate 12 by welding or assembly.

[0052] In some embodiments, a mounting protrusion 14 for fixing a carpet component and / or a wiring harness component in the passenger compartment may also be provided on the top panel 12. It is understandable that the present embodiment does not limit the structure and type of the mounting protrusion 14 provided on the top panel 12.

[0053] In some embodiments, the mounting protrusion 14 may be disposed on the reinforcing beam 13 of the top plate 12. Due to the reinforcing effect of the reinforcing beam 13, the installation stability of the components in the passenger compartment can be improved, and damage to the top plate 12 when the components (such as seats) are subjected to large external forces can be avoided, thereby improving the stability of the power battery pack 10.

[0054] In this embodiment, in order to improve the structural strength and load-bearing capacity of the top plate 12, the top plate 12 and the bottom plate can be made of different materials, and the material strength of the top plate 12 is higher than that of the bottom plate; or, the structural strength of the top plate 12 is higher than that of the bottom plate. For example, the thickness of the top plate 12 can be set to be greater than the thickness of the bottom plate, or a reinforcing structure can be formed on the top plate 12. This can withstand a greater load and avoid deformation due to external forces after being used as a floor. At the same time, since the bottom plate has a lower material strength or structural strength, the cost can be controlled.

[0055] In some embodiments, the floor frame 21 includes a front mounting portion corresponding to the front passenger compartment of the vehicle body and a rear mounting portion corresponding to the rear passenger compartment of the vehicle body, and the front and rear sides of the top plate 12 are respectively arranged corresponding to the front mounting portion and the rear mounting portion to form a floor corresponding to the front passenger compartment of the vehicle body and a floor corresponding to the rear passenger compartment of the vehicle body. With such a structure, the floors of different areas in the vehicle body are all formed by the top plate 12 of the upper box body 111, which improves the structural consistency and reliability of the whole vehicle.

[0056] In some embodiments, the floor frame 21 is a sheet metal welded part, a profile part, a composite material part or a cast aluminum part. In this way, since the floor frame 21 is an integrated structure, the part where it is joined with the battery box 11 can form a flat planar structure, and the planar structure can achieve a sealed connection with the raised structure of the battery box 11 by surface contact, and the connection stability is better.

[0057] In some embodiments, the lower box 112 is a profiled part or a cast aluminum part; or the upper box 111 is a sheet metal welded part, a composite material part or a cast aluminum part. In this way, when the lower box 112 and the upper box 111 are connected to the floor frame 21, the force on the connection part is more uniform, not only the stability of the power battery pack is better, but also the structural strength of the floor formed by the top plate 12 is better.

[0058] The above describes the power battery and vehicle body integrated structure provided by the embodiment of the present application. Accordingly, the embodiment of the present application also provides a vehicle, including the power battery pack and vehicle body integrated structure of the above embodiment. It can be understood that the vehicle of the embodiment of the present application can be an electric vehicle or a hybrid vehicle.

[0059] The integrated structure of the power battery pack and the vehicle body includes: a floor frame 21 and a power battery pack 10 mounted on the floor frame 21; wherein the power battery pack 10 includes a battery case 11 having an internal accommodating space and a battery cell arranged in the internal accommodating space, the battery case 11 has a top plate 12 and a bottom plate along the height direction of the vehicle, and the battery cell is arranged between the top plate 12 and the bottom plate; wherein the floor frame 21 is provided with an opening 22, and the battery case 11 is installed at the opening 22 of the floor frame 21, so that the top plate 12 forms the vehicle body floor.

[0060] The vehicle provided in this embodiment can reduce the structural redundancy between the battery box and the vehicle body, thereby reducing the weight and cost of the entire vehicle and saving space in the height direction of the vehicle; by making the power battery pack 10 a part of the entire vehicle structure, the integration of the power battery pack 10 and the entire vehicle structure can be improved.

[0061] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of the various embodiments have their own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily required for the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application can be adjusted in order, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0062] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A vehicle power battery pack and vehicle body integrated structure, characterized in that: include: A floor frame and a power battery pack mounted on the floor frame; The power battery pack includes a battery box having an internal accommodation space and a battery cell arranged in the internal accommodation space, the battery box having a top plate and a bottom plate along the height direction of the vehicle, and the battery cell is arranged between the top plate and the bottom plate; The floor frame is provided with an opening, and the battery box is installed at the opening of the floor frame, so that the top plate forms the body floor of the vehicle; The battery box includes an upper box and a lower box fixed relative to each other along the height direction, the upper box has the top plate, the lower box has the bottom plate, and the upper box and the lower box together define the internal accommodation space; The lower box is fixedly mounted on the floor frame, and the upper box is fixedly mounted on the lower box and is not in contact with the floor frame; the upper box is supported by the lower box and has no connection force constraint with the floor frame, and when the top plate of the upper box is under load, it is used to transfer the pressure of the upper box to the lower box.

2. The power battery pack and vehicle body integrated structure according to claim 1, characterized in that: The upper box body and the lower box body are fixedly mounted on the floor frame by the same fastener.

3. The power battery pack and vehicle body integrated structure according to claim 2, characterized in that: Along the height direction, the top plate at least partially extends into the opening.

4. The power battery pack and vehicle body integrated structure according to claim 1, characterized in that: A mounting protrusion for mounting components in the passenger compartment of the vehicle is provided on a side of the top plate facing away from the battery core.

5. The power battery pack and vehicle body integrated structure according to claim 1, characterized in that: The roof panel is provided with a reinforcing beam extending between both sides in the width direction of the vehicle; The reinforcing beam is arranged on a side of the top plate away from the battery core, and the reinforcing beam is provided with at least one mounting protrusion for mounting a preset component in the vehicle body.

6. The power battery pack and vehicle body integrated structure according to any one of claims 1 to 5, characterized in that: The lower box body has a flange extending from the outer peripheral wall in the horizontal direction, and the flange is provided with a plurality of connection parts arranged at intervals; The floor frame includes mounting beams located on both sides of the vehicle in the width direction, the opening is formed between the mounting beams on both sides, a connecting surface is formed at the bottom of the mounting beam, the lower box is fixedly mounted on the floor frame at the connecting portion by fasteners, and the connecting portion is tightly attached to the connecting surface.

7. The power battery pack and vehicle body integrated structure according to any one of claims 1 to 5, characterized in that: The floor frame is a sheet metal welded part, a profile part, a composite material part or a cast aluminum part; and / or, The lower box body is a profile molded part or a cast aluminum molded part; and / or, The upper box body is a sheet metal welded part, a composite material part or a cast aluminum part.

8. The power battery pack and vehicle body integrated structure according to any one of claims 1 to 5, characterized in that: The top plate and the bottom plate are made of different materials, and the material strength of the top plate is higher than that of the bottom plate; and / or, The structural strength of the top plate is higher than that of the bottom plate, including: the thickness of the top plate is greater than the thickness of the bottom plate, and / or the top plate is formed with a reinforcement structure.

9. A vehicle, characterized in that: It includes a power battery pack and vehicle body integrated structure as described in any one of claims 1 to 8.

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