Vehicle body, battery pack and vehicle

Abstract

The utility model relates to a vehicle body, a battery pack and a vehicle, the vehicle body comprises a doorsill beam and a rear longitudinal beam, the rear longitudinal beam is connected with one end, facing the rear of the vehicle, of the doorsill beam, and the rear longitudinal beam is used for being connected with the battery pack. In the vehicle body, a rear longitudinal beam is connected with the end, facing the rear portion of the vehicle, of a threshold beam, and the rear longitudinal beam is used for being connected with a battery pack. The doorsill beam, the rear longitudinal beam and the battery pack form a newly added force transmission path, when the vehicle body is twisted or the side part is impacted, the force can be transmitted through the force transmission path formed by the doorsill beam, the rear longitudinal beam and the battery pack, the torsional rigidity of the vehicle body is improved, and the whole vehicle body is more stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle body, in particular to a vehicle body, a battery pack and a vehicle. BACKGROUND

[0002] In the related art, the vehicle body of a new energy vehicle has defects such as insufficient torsional stiffness and insufficient force transmission. For example, when a new energy vehicle with a load-bearing structure turns, due to the lack of rigid resistance structure in its vehicle body, it can only rely on the flexible resistance of metal to resist impact force. High-frequency non-uniform torsion can cause metal fatigue in the steel plate of the vehicle body, making the thin steel plate metal structure of the load-bearing body "loose". CONTENT OF THE UTILITY MODEL

[0003] The embodiments of the present application provide a vehicle body, a battery pack and a vehicle, which improve the torsional stiffness of the vehicle body to at least partially solve the above technical problems.

[0004] In order to achieve the above purpose, according to the first aspect of the present application, a vehicle body is provided, comprising:

[0005] a rocker beam;

[0006] a rear longitudinal beam connected to one end of the rocker beam facing the rear of the vehicle, the rear longitudinal beam being configured to be connected to a battery pack.

[0007] Optionally, the vehicle body further comprises a connecting bracket, one end of the connecting bracket being connected to the rear longitudinal beam, and the other end of the connecting bracket being configured to be connected to the battery pack.

[0008] Optionally, the connecting bracket comprises a first connecting member and a second connecting member connected to each other, the first connecting member being connected to the rear longitudinal beam, and the second connecting member comprising a first connecting end and a second connecting end, both the first connecting end and the second connecting end being configured to connect the battery pack, and the first connecting end and the second connecting end being spaced apart in the height direction of the vehicle body.

[0009] Optionally, the vehicle body further comprises a rear cross beam connected to the rear longitudinal beam.

[0010] Optionally, the rear cross beam is configured to be connected to at least part of the battery pack.

[0011] Optionally, the vehicle body further comprises a mounting seat, one end of the mounting seat being connected to the rear cross beam, and the other end of the mounting seat being configured to be connected to the battery pack.

[0012] Optionally, the mounting seat is a plurality of mounting seats, and the plurality of mounting seats are spaced apart in the width direction of the vehicle.

[0013] According to the second aspect of the present application, a battery pack is provided for the vehicle body described above.

[0014] Optionally, the battery pack comprises a first part and a second part, the first part is arranged under the passenger cabin, and at least part of the second part is arranged to connect with the rear longitudinal beam.

[0015] Optionally, along the width direction of the vehicle body, the width of the second part is less than or equal to the width of the first part.

[0016] Optionally, along the width direction of the vehicle body, the first part is arranged to connect with the rocker beam.

[0017] Optionally, the battery pack is arranged to connect with the rear longitudinal beam through the connecting support of the vehicle body.

[0018] Optionally, at least part of the battery pack is arranged to connect with the rear cross beam of the vehicle body, and the rear cross beam is connected with the rear longitudinal beam.

[0019] Optionally, the battery pack is arranged to connect with the rear cross beam through the mounting seat of the vehicle body.

[0020] According to a third aspect of the present application, a vehicle is also provided, comprising:

[0021] a vehicle body as described above;

[0022] a battery pack as described above.

[0023] Optionally, the vehicle further comprises a cargo box, the cargo box is arranged on the side of the rear longitudinal beam away from the ground, and at least part of the battery pack is arranged under the cargo box.

[0024] Optionally, the vehicle further comprises a passenger cabin, the passenger cabin and the cargo box are arranged along the length direction of the vehicle body, the first part of the battery pack is arranged under the passenger cabin, the second part of the battery pack is arranged under the cargo box, the rear longitudinal beam is arranged in two, the two rear longitudinal beams are arranged along the width direction of the vehicle, and at least part of the second part is arranged between the two rear longitudinal beams.

[0025] In the vehicle body of the embodiment of the present application, the rear longitudinal beam is connected with the end of the rocker beam facing the rear of the vehicle, and the rear longitudinal beam is arranged to connect with the battery pack. The rocker beam, the rear longitudinal beam and the battery pack form an additional force transmission path. When the vehicle body is twisted or the side is impacted, the force transmission path formed by the rocker beam, the rear longitudinal beam and the battery pack can be used for force transmission, the torsional stiffness of the vehicle body is improved, and the vehicle body as a whole is more stable.

[0026] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0028] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0029] Figure 1 is a top view of a vehicle body and a battery pack provided in an exemplary embodiment of the present disclosure;

[0030] Figure 2 is a rear view of a vehicle body and a battery pack provided in an exemplary embodiment of the present disclosure;

[0031] Figure 3 is a side view of a vehicle body and a battery pack provided in an exemplary embodiment of the present disclosure;

[0032] Figure 4 is a first bottom view of a vehicle body and a battery pack provided in an exemplary embodiment of the present disclosure;

[0033] Figure 5 is a second bottom view of a vehicle body and a battery pack provided in an exemplary embodiment of the present disclosure;

[0034] Figure 6 is an assembly structure schematic view of a vehicle body and a battery pack from a first perspective provided in an exemplary embodiment of the present disclosure;

[0035] Figure 7 is an assembly structure schematic view of a vehicle body and a battery pack from a second perspective provided in an exemplary embodiment of the present disclosure.

[0036] Explanation of reference numerals:

[0037] 100, rear longitudinal beam; 110, first rear longitudinal beam; 120, second rear longitudinal beam;

[0038] 200, battery pack; 210, first part; 230, second part;

[0039] 310, front compartment; 330, passenger compartment; 350, cargo box; 351, cargo box upper column;

[0040] 410, rocker beam;

[0041] 510, fastener;

[0042] 600, connecting bracket; 610, first connecting member; 630, second connecting member; 631, first connecting end; 633, second connecting end;

[0043] 700, rear cross beam;

[0044] 800, mounting seat;

[0045] 910, rear cross beam connecting joint; 930, front mounting point of rear subframe; 940, rear mounting point of rear subframe. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative labor fall within the protection scope of the present application.

[0047] Reference Figures 1 to 7 In a first aspect, the present disclosure provides a vehicle body.

[0048] Please refer to Figure 1 The vehicle body can include a front compartment 310, a passenger compartment 330 and a cargo box 350 arranged along the length direction of the vehicle (or the length direction of the vehicle body). The front compartment 310 can be used to install components such as engines, and the passenger compartment 330 can be used for passengers to sit, please refer to Figure 2 The cargo box 350 can be used to carry goods. The front compartment 310 is located at the position of the front of the vehicle, and the cargo box 350 is located at the position of the rear of the vehicle. The front compartment 310 is located in front of the cargo box 350, and the cargo box 350 is located behind the front compartment 310.

[0049] Please refer to Figure 3 The vehicle body can further include a cargo box upper column 351, which can support the roof and support the cargo box 350.

[0050] Please refer to Figure 4 In order to optimize the weight distribution of the vehicle, the battery pack 200 can be installed at the bottom of the vehicle, and in some embodiments, the battery pack 200 can be installed at the center of the bottom of the vehicle.

[0051] Please refer to Figure 5 , Figure 6 and Figure 7 The vehicle body can include a rocker beam 410 and a rear longitudinal beam 100, the rear longitudinal beam 100 is connected to one end of the rocker beam 410 (or the end of the rocker beam 410 away from the front compartment 310 is connected to one end of the front compartment 310), and the rear longitudinal beam 100 is used to connect with the battery pack 200.

[0052] In the vehicle body of the embodiment of the present application, the rear longitudinal beam is connected to the end of the rocker beam facing the rear of the vehicle, and the rear longitudinal beam is used to be connected to the battery pack. The rocker beam, the rear longitudinal beam and the battery pack form an additional force transmission path. When the vehicle body is twisted or the side is impacted, the force transmission path formed by the rocker beam, the rear longitudinal beam and the battery pack can be used for force transmission, the torsional stiffness of the vehicle body is improved, and the overall stability of the vehicle body is improved.

[0053] In some embodiments, the rear longitudinal beam 100 can be configured as two. For the sake of distinction, the two rear longitudinal beams 100 are defined as a first rear longitudinal beam 110 and a second rear longitudinal beam 120. The two rear longitudinal beams 100, i.e., the first rear longitudinal beam 110 and the second rear longitudinal beam 120, are arranged along the width direction of the vehicle. The battery pack 200 can be connected to the two rear longitudinal beams.

[0054] The rear longitudinal beam 100 is a key structural component located at the rear of the vehicle. It is usually connected together by riveting or welding to form a solid rigid frame. The rear longitudinal beam not only provides structural support, but also enhances the torsional stiffness of the vehicle frame and bears longitudinal loads. In the event of a collision, the rear longitudinal beam can absorb and disperse impact energy to ensure the safety of passengers.

[0055] The battery pack 200 can include opposite ends arranged along the width direction of the vehicle (or the width direction of the vehicle body). One end is connected to a rear longitudinal beam, for example, by screwing, clamping, welding or the like. The other end is connected to another rear longitudinal beam, for example, by screwing, clamping, welding or the like. In some examples, one end of the battery pack 200 is screwed to a rear longitudinal beam, and the other end of the battery pack 200 is screwed to another rear longitudinal beam.

[0056] The rocker beam 410 can refer to a structure connecting the floor and the side wall assembly on both sides of the vehicle body. In some embodiments, the vehicle body can be a pickup truck type vehicle body. The rear end of the rocker beam 410 is provided with a rear longitudinal beam, and the rocker beam 410 can be located at the side of the middle part of the vehicle body.

[0057] The rear longitudinal beam 100 can include a first end and a second end arranged along the length direction of the vehicle. The first end is connected to the rocker beam 410, and at least part of the battery pack 200 is located between the first end and the second end and connected to the rear longitudinal beam 100.

[0058] The rear cross beam 700 is arranged between the first end and the second end of the rear longitudinal beam 100.

[0059] In some embodiments, the vehicle body can further include a plurality of fasteners 510 for connecting the battery pack 200 and the rocker beam 410. The rocker beam 410 extends along the length direction of the vehicle (or the length direction of the vehicle body), and the plurality of fasteners 510 are arranged at intervals along the extension direction of the rocker beam 410. The fastener 510 can be a bolt.

[0060] In some examples, the mounting points of the inner plate of the threshold beam can be bolted respectively, so that the bolts are arranged along the length direction of the vehicle, which can greatly improve the structural stability of the battery pack 200.

[0061] In some embodiments, the vehicle body can further include a connecting bracket 600, one end of the connecting bracket 600 being connected to the rear longitudinal beam 100, for example, being screwed, clamped, welded, etc. The other end of the connecting bracket 600 is used to connect with the battery pack 200, for example, being screwed, clamped, welded, etc. In these embodiments, the rear longitudinal beam 100 and the battery pack 200 are connected through the connecting bracket 600, which can better protect the rear longitudinal beam 100 and the battery pack 200.

[0062] In some embodiments, the connecting bracket 600 includes a first connecting piece 610 and a second connecting piece 630 connected with each other, the first connecting piece 610 being connected to the rear longitudinal beam 100, and the second connecting piece 630 including a first connecting end 631 and a second connecting end 633, both of which are used to connect with the battery pack 200, and the first connecting end 631 and the second connecting end 633 are spaced apart along the height direction of the vehicle body.

[0063] In this way, the battery pack 200 and the rear longitudinal beam 100 are connected through the connecting bracket 600, which facilitates the transmission of the force received by the battery pack 200 to the upper and lower surfaces of the battery pack, i.e., the surface of the battery pack facing away from the ground and the surface of the battery pack facing the ground, so that the overall structure of the battery pack can be more stable when subjected to impact.

[0064] In some examples, under corresponding working conditions such as bumping, braking, steering, etc., the connecting bracket 600 and the rear longitudinal beam 100 can be connected through bolts, that is, the first connecting piece 610 and the rear longitudinal beam 100 can be connected through bolts. Further, a mounting back plate can be provided inside the rear longitudinal beam 100, so that the bolts can connect the connecting bracket 600, the rear longitudinal beam, and the mounting back plate, and the mounting back plate can be used to strengthen the connection position of the bolts and the rear longitudinal beam 100. In some examples, the connecting bracket 600 and the battery pack 200 are welded. In some examples, the first connecting end 631 and the battery pack 200 are welded. The second connecting end 633 and the battery pack 200 are welded. The connecting bracket 600 can be connected with the battery pack 200 in the form of a weld, which can well disperse the load received by the bolts to a larger area, reduce the concentration of local stress, and thus improve the reliability of the connection. In some examples, the material of the rear longitudinal beam 100 can be a high-strength plate formed by hot forming. In this way, the strength of the mounting point of the battery pack 200 can be ensured, and at the same time, the load received by the bolts can be uniformly dispersed to a larger surface area of the rear longitudinal beam, reducing the phenomenon of stress concentration and improving the service life of the rear longitudinal beam.

[0065] Please refer to Figure 6 In some embodiments, the vehicle body further comprises a rear cross beam 700 connected to the rear longitudinal beam 100. In this way, the rear cross beam 700 and the rear longitudinal beam 100 form a force transmission path, so that when the vehicle body is subjected to a collision in the width direction of the vehicle, in addition to transmitting force through the rear cross beam 700, it can also transmit force to the rear longitudinal beam 100 and the battery pack 200 through the rear cross beam 700, making the overall vehicle body more stable and less likely to lose stability.

[0066] In some embodiments, the rear cross beam 700 can be located at the bottom of the vehicle and can be made of high-strength steel. The main function of the rear cross beam 700 is to disperse and absorb impact force when the vehicle is hit, protecting the safety of the passengers inside the vehicle. In particular, in the case of a side impact, the structure and strength of the rear seat cross beam have a decisive influence on the safety performance of the vehicle.

[0067] In some embodiments, the rear cross beam 700 is used to connect with at least part of the battery pack 200. Due to the connection of the battery pack 200 with the rear cross beam 700, the support of the rear cross beam Y, or in other words, the width direction of the vehicle, is greatly improved. In addition, after the battery pack 200 is connected with the rear longitudinal beam, a force transmission path similar to other rear cross beams is formed at the bottom, which greatly improves the torsional stiffness of the entire vehicle.

[0068] In some embodiments, the vehicle body further comprises a mounting seat 800, one end of the mounting seat 800 being connected to the rear cross beam 700, and the other end of the mounting seat 800 being used to connect with the battery pack 200.

[0069] The mounting seat 800 can be connected between the rear cross beam and the battery pack 200, so that part of the rear cross beam 700 is spaced apart from the battery pack 200. In this way, the heat dissipation space of the battery pack 200 is large, and the heat dissipation effect is good.

[0070] In some examples, the mounting seat 800 can be welded between the rear cross beam 700. The mounting seat 800 can be screwed with the battery pack 200. In this way, the stability of the connection of the mounting seat 800, the rear cross beam 700 and the battery pack 200 is greatly improved, and the force value of the rear cross beam 700 or the battery pack 200 can also be more evenly distributed on each force surface of the mounting seat 800. The rear cross beam 700 will not be subjected to a large force value from the mounting seat 800, thereby improving the structural strength of the rear cross beam 700.

[0071] In some embodiments, the mounting seat 800 is a plurality of mounting seats 800, and the plurality of mounting seats 800 are arranged in the width direction of the vehicle.

[0072] In a second aspect, the present application also provides a battery pack 200 applied to the above-mentioned vehicle body. The battery pack 200 comprises the above-mentioned vehicle body. The battery pack 200 has all the beneficial effects of the above-mentioned vehicle body, and the present disclosure will not be repeated here.

[0073] To optimize the weight distribution of the vehicle, the battery pack 200 can be installed at the bottom of the vehicle, especially at the center of the vehicle.

[0074] Please refer to Figure 6 In some embodiments, the battery pack 200 includes a first portion 210 and a second portion 230, the first portion 210 is configured to be installed below the passenger compartment 330, and the second portion 230 is configured to be installed below the cargo box 350, at least part of the second portion 230 is configured to be connected with the rear longitudinal beam 100.

[0075] The vehicle can include a cargo box 350, which can be mainly located on the side of the first rear longitudinal beam 110 and the second rear longitudinal beam 120 away from the ground, and at least part of the battery pack 200 is arranged below the cargo box 350. In some examples, the cargo box 350 can be arranged above the rear longitudinal beam, i.e., on the side of the rear longitudinal beam away from the ground, and the battery pack 200 can be arranged below the rear longitudinal beam, i.e., on the side of the rear longitudinal beam facing the ground. In this way, at least part of the battery pack 200 is installed below the cargo box 350.

[0076] In some examples, the vehicle can be a pickup truck, which belongs to a type of multi-purpose vehicle designed to meet the needs of daily driving and also to meet the needs of special purposes such as carrying goods and off-road driving.

[0077] Arranging the cargo box above the rear longitudinal beam and using the rear longitudinal beam to mount the battery pack allows the cargo box and the battery pack to be stably installed.

[0078] In some embodiments, the vehicle can include a passenger compartment 330, the passenger compartment 330 and the cargo box 350 are arranged along the length direction of the vehicle, and the battery pack 200 includes a first portion 210 and a second portion 230, the first portion 210 is installed below the passenger compartment 330, and the second portion 230 is installed below the cargo box 350, at least part of the second portion 230 is located between the two rear longitudinal beams. In these embodiments, the vehicle includes a passenger compartment 330, the passenger compartment 330 and the cargo box 350 are arranged along the length direction of the vehicle, and the driver and the passenger can be in the passenger compartment 330, and the cargo box 350 can be used to carry goods to meet the needs of carrying goods.

[0079] In some examples, the second portion 230 of the battery pack can be arranged below the rear longitudinal beam, i.e., on the side of the rear longitudinal beam facing the ground. In this way, at least part of the battery pack 200 is installed below the cargo box 350. The first portion 210 and the second portion 230 can be fixedly connected.

[0080] The second part 230 and the first part 210 together constitute the battery pack 200, at least part of the battery pack 200 is arranged below the cargo box 350, and the battery pack 200 as a whole has a "convex" structure. The battery pack is arranged as a convex battery pack, so as to fully utilize the space below the vehicle body, improve the cell capacity of the battery pack 200, and increase the endurance.

[0081] In some embodiments, along the width direction of the vehicle body, the width of the second part 230 is less than or equal to the width of the first part 210. In some examples, along the length direction of the vehicle, the width of the battery pack can gradually decrease.

[0082] In these embodiments, since the second part 230 is arranged below the cargo box 350, there are two rear longitudinal beams below the cargo box 350, at least part of the second part 230 is located between the two rear longitudinal beams 100, along the width direction of the vehicle, the width of the second part 230 is less than or equal to the width of the first part 210, so that the second part 230 can be located between the two rear longitudinal beams.

[0083] In some embodiments, along the width direction of the vehicle body, the first part 210 is used to connect with the rocker beam 410. In these embodiments, the rocker beam 410 can refer to a structure located on both sides of the vehicle body and connecting the floor and the side wall assembly.

[0084] In some embodiments, the battery pack 200 is used to connect the rear longitudinal beam 100 through the connecting bracket 600 of the vehicle body. In these embodiments, the connecting bracket 600 connects the battery pack 200 and the rear longitudinal beam 100, so as to facilitate the transmission of the force to the upper and lower surfaces of the battery pack 200, i.e., the surfaces of the battery pack away from the ground and the surfaces of the battery pack facing the ground, so that the overall structure of the battery pack can be more stable when subjected to impact.

[0085] In some embodiments, at least part of the battery pack 200 is used to connect with the rear cross beam 700 of the vehicle body, and the rear cross beam 700 is connected with the rear longitudinal beam 100. In this way, the rear cross beam 700 and the rear longitudinal beam 100 form a force transmission path, so that when the vehicle body is subjected to Y-direction impact, i.e., along the width direction of the vehicle, in addition to the force transmission through the rear cross beam 700, the force can also be transmitted from the rear cross beam 700 to the rear longitudinal beam 100 and the battery pack 200, and the overall vehicle body is more stable and less likely to lose stability.

[0086] In some embodiments, the battery pack is connected to the rear cross beam through a mounting seat 800 of the vehicle body. The mounting seat 800 can be connected between the rear cross beam and the second part, so that the part of the rear cross beam 700 is spaced from the second part 230. In this way, the heat dissipation space of the battery pack 200 is large, and the heat dissipation effect is good. The mounting seat 800 can be welded with the rear cross beam. The mounting seat 800 can be screwed with the battery pack 200. In this way, the stability of the connection is improved, and the force value can be more evenly distributed on each force surface of the mounting seat 800. The rear cross beam 700 will not be subjected to a large force value from the mounting seat 800, thereby improving the structural strength of the rear cross beam 700.

[0087] In some examples, the connecting bracket 600 can be mounted on the second part 230, and the first rear longitudinal beam 110 and the second rear longitudinal beam 120 can be detachably connected with the connecting bracket 600. That is, the rear longitudinal beam and the second part 230 are connected through the connecting bracket 600.

[0088] In some examples, the connecting bracket 600 is connected with the second part 230 and protrudes outward relative to the battery pack 200. The connecting bracket 600 can specifically adopt the structure of an aluminum frame, so that when the side of the vehicle is subjected to a collision, the connecting bracket 600 can collide with external objects before the battery pack, and the connecting bracket 600 can deform to absorb the collision energy, so that the battery pack bears less collision energy, thereby better protecting the battery pack.

[0089] The connecting bracket 600 can be connected with the battery pack 200 in the form of a weld, which can well disperse the load borne by the bolt to a larger area, reduce the concentration of local stress, and thereby improve the reliability of the connection.

[0090] In some examples, the connecting bracket 600 is two, and the two connecting brackets 600 are respectively mounted on opposite ends of the second part 230, one connecting bracket 600 is connected with one rear longitudinal beam, and the other connecting bracket 600 is connected with the other rear longitudinal beam. In this way, when subjected to a Y-direction load, the connecting bracket 600 can absorb more energy, thereby protecting the internal cells of the battery pack,

[0091] In some examples, there is a first force transmission path in the vehicle, which is from the cargo box upper pillar 351, the rocker beam 410, the rear longitudinal beam, the rear cross beam connecting joint 910, and finally to the rear cross beam 700. The battery pack 200 is bolted with one rear longitudinal beam through the connecting bracket 600 located at opposite ends thereof, thereby forming a second force transmission path on the lower side of the cargo box 350 and the upper side of the rear cross beam, and the second force transmission path enhances the original first force transmission path. In some examples, the cargo box upper pillar 351 can support the roof and support the cargo box.

[0092] By setting the connecting bracket, the second part 230 of the battery pack 200 serves as the main force transmission component, so that the structural strength of the vehicle is improved, and when the vehicle body is subjected to a Y-direction impact, i.e., along the width direction of the vehicle, the overall vehicle body is more stable and less likely to lose stability. At the same time, the carrying capacity of the cargo box 350 is improved, and when the cargo box 350 is carrying goods, the overall structure is more stable, and the ability to resist external loads is also correspondingly enhanced.

[0093] In some embodiments, the connecting bracket 600 includes a first connecting piece 610 connected to the rear longitudinal beam 110, 120 and a second connecting piece 630 including a first connecting end 631 and a second connecting end 633, both of which are used to connect the second part 230, and the first connecting end 631 and the second connecting end 633 are spaced apart along the height direction of the vehicle.

[0094] In this way, the connecting bracket 600 connects the second part 230 of the battery pack 200 with the rear longitudinal beam 110, 120, facilitating the transmission of the force received to the upper and lower surfaces of the battery pack 200, i.e., the surfaces of the battery pack away from the ground and the surfaces of the battery pack facing the ground, so that the overall structure of the battery pack can be more stable when subjected to impact.

[0095] In some embodiments, the connecting bracket 600 and the battery pack 200 are welded. The connecting bracket 600 can be connected to the battery pack 200 in the form of a weld, which can well disperse the load received by the bolt to a larger area, reduce the concentration of local stress, and thus improve the reliability of the connection.

[0096] In some examples, under corresponding working conditions such as bumping, braking, steering, etc., the connecting bracket 600 and the rear longitudinal beam can be connected by bolts, and a mounting back plate can also be provided inside the rear longitudinal beam, so that the bolts connect the connecting bracket 600, the rear longitudinal beam, and the mounting back plate, and the mounting back plate strengthens the connection position of the bolts and the rear longitudinal beam.

[0097] In some examples, the material of the rear longitudinal beam can be a high-strength sheet that is hot formed, so that the strength of the battery pack mounting point is ensured, and at the same time, the load received by the bolt is uniformly dispersed to a larger surface area of the rear longitudinal beam, reducing the phenomenon of stress concentration and improving the service life of the rear longitudinal beam.

[0098] In some embodiments, the vehicle further includes a rear cross beam 700 located on the side of the cargo box 350 facing the ground, the opposite ends of the rear cross beam are respectively connected to the two rear longitudinal beams 110, 120, and at least part of the second part 230 is located on the side of the rear cross beam away from the cargo box 350 and is connected to the rear cross beam 700. In this way, the battery pack 200 is closely connected to the rear cross beam 700. In some embodiments, the vehicle further includes a rear cross beam 700 located on the side of the cargo box 350 facing the ground, the opposite ends of the rear cross beam are respectively connected to the two rear longitudinal beams 110, 120, and at least part of the second part 230 is located on the side of the rear cross beam away from the cargo box 350 and is connected to the rear cross beam 700. In this way, the battery pack 200 is closely connected to the rear cross beam 700.

[0099] Due to the connection of the battery pack 200 and the rear cross beam 700, the support property of the rear cross beam Y or the width direction of the vehicle is greatly improved.

[0100] Please refer to Figure 6 , Figure 6 The positions of the rear subframe front mounting point 930 and the rear subframe rear mounting point 940 are shown in the rear cross beam 700. In some examples, due to the rear subframe front mounting point 930 on the left and right sides being closer to the rear cross beam 700, the bending moment of the rear cross beam 700 in the Y direction or the width direction of the vehicle is greatly improved, and the Y direction dynamic stiffness of the rear subframe front mounting point 930 is also greatly improved.

[0101] In the embodiments of the present application, the connection of the battery pack 200 and the rear cross beam 700 helps to reduce the length of the force arm of the dynamic stiffness excitation load, thereby improving the Y direction dynamic stiffness of the rear subframe front mounting point and the Y direction bending moment capacity of the rear cross beam.

[0102] The rear cross beam 700 is a structural component that supports and connects the vehicle body. The firm connection of the battery pack 200 and the rear cross beam 700 has the following effects:

[0103] First, the dynamic performance can be optimized, that is, by reducing the influence of the dynamic activity of the connection point of the battery pack 200 and the rear cross beam 700 on the rear longitudinal beam of the vehicle, such as the influence of the vibration of the vehicle during driving on the rear longitudinal beam of the vehicle, the unevenness of the vehicle body response can be reduced, thereby improving the stability of the vehicle during high-speed driving.

[0104] Second, the stiffness of the frame can be improved: since the battery pack also includes a second part 230 arranged below the cargo box, the second part 230 is connected with the first rear longitudinal beam 110 and the second rear longitudinal beam 120, and the second part 230 is connected with the rear cross beam 700. Compared with the battery pack in the related art, the connection design of the second part reduces the length of the force arm, and the connection of the second part 230 with the first rear longitudinal beam 110 and the second rear longitudinal beam 120 can share part of the force, which means that the bending moment resistance of the rear cross beam 700 in the Y axis direction, which is usually perpendicular to the ground, is enhanced, making the frame more solid and better resisting lateral load and jolt.

[0105] Third, the enhanced dynamic stiffness and bending moment capacity help to protect the battery pack and prevent the battery from being damaged in a collision accident, ensuring the safety of the passenger area and the integrity of the battery system.

[0106] Fourth, vibration transmission can be reduced. Reducing the length of the force arm helps to reduce the direct transmission of battery vibration to the cockpit, improving the comfort of passengers.

[0107] In some embodiments, the second part 230 can be screwed with the rear cross beam 700.

[0108] In some embodiments, the cargo box 350 can be welded with the rear cross beam 700. The cargo box 350 can be welded with the rear cross beam 700, and the welding points can be evenly distributed along the Y direction (i.e., the width direction of the vehicle), so that the entire rear cross beam 700 can better support the cargo box 350 in the Z direction (i.e., the height direction of the vehicle).

[0109] In some embodiments, a mounting seat 800 can be further included, which is connected between the rear cross beam and the second part, so that the rear cross beam 700 and the second part 230 are spaced apart. In this way, the second part 230 has a larger heat dissipation space and a better heat dissipation effect. The mounting seat 800 can be welded with the rear cross beam. The mounting seat 800 can be screwed with the battery pack 200. In this way, the stability of the connection is improved, and the force value can be more evenly distributed on each force surface of the mounting seat 800. The rear cross beam 700 will not be subjected to a large force value from the mounting seat 800, thereby improving the structural strength of the rear cross beam 700.

[0110] In some embodiments, the mounting seat 800 can be configured as multiple mounting seats 800, which are spaced apart on the rear cross beam 700. For example, the mounting seat 800 can be configured as two mounting seats 800.

[0111] In some embodiments, when the mounting seat 800 is manufactured and produced, the mounting seat 800 can be designed in the form of a self-welding edge, specifically in the form of a self-welding edge along the Z direction (i.e., the height direction of the vehicle). In this way, a stronger structure can be provided, so that the mounted battery pack 200 will not be unstable when the vehicle is subjected to various working conditions, and at the same time, a stronger structural support along the Z direction (i.e., the height direction of the vehicle) can be provided.

[0112] In some examples, the self-welding edge surface can generate six welding points,

[0113] In some examples, the mounting seat 800 can be made of high-strength steel, and the mounting seat 800 can be uniformly connected with the lower rear cross beam 4 through welding points.

[0114] In some examples, the mounting seat 800 and the rear cross beam 700 can have four welding points.

[0115] In the present application, the battery pack is connected with the rear cross beam, the space is fully utilized, the battery pack endurance is improved, and the connection between the vehicle body and the battery pack is enhanced to form an overall structure and a complete and effective force transmission path.

[0116] In some examples, the two connecting brackets 600 are respectively arranged at opposite ends of the second part 230 of the battery pack 200, one connecting bracket 600 is connected with one rear longitudinal beam, and the other connecting bracket 600 is connected with the other rear longitudinal beam.

[0117] In some examples, the two mounting seats 800 are connected between the rear cross beam 700 and the second part 230. The rear cross beam 700 extends along the width direction of the vehicle, and the two mounting seats 800 are arranged on the rear cross beam 700 along the width direction of the vehicle.

[0118] In this way, the mounting positions of the battery pack 200 are four, i.e., the mounting positions of the battery pack 200 and the two connecting brackets 600 and the mounting positions of the battery pack 200 and the two mounting seats 800, so that the connection between the battery pack 200 and the vehicle body is more secure. It is easy to understand that the stress values of the corresponding mounting positions in the bumping, braking, and steering working conditions are greatly reduced. By arranging the four mounting positions, the stress of the mounting points is avoided to exceed the maximum yield stress of the material, so that the stability of the battery pack in the bumping, braking, and steering working conditions of the vehicle is also greatly improved, and the concentrated stress values of the mounting positions are reduced.

[0119] In the embodiment of the application, the rear cross beam 700 and the battery pack 200 are connected through the mounting seats 800 on the rear cross beam 700, so that the resistance of the rear cross beam 700 is greatly improved, and the first rear longitudinal beam 110 and the second rear longitudinal beam 120 and the upper load cargo box have good stability during vehicle driving through the connection of the rear cross beam 700.

[0120] In the embodiment of the application, after the battery pack 200 is connected with the first rear longitudinal beam 110 and the second rear longitudinal beam 120, a bottom force transmission path similar to other rear cross beams can be formed, and the torsional stiffness of the whole vehicle is greatly improved. In some examples, the battery pack 200 can be connected with the rear longitudinal beam through the connecting bracket 600 through a bolt to form a force transmission path.

[0121] In a third aspect, the embodiment of the application further provides a vehicle, which comprises a vehicle body and a battery pack 200. The vehicle body is the above-mentioned vehicle body, and the battery pack 200 is the above-mentioned battery pack. The vehicle comprises the above-mentioned vehicle body and the battery pack 200. The vehicle has all the beneficial effects of the above-mentioned vehicle body and the battery pack 200, and the disclosure will not be repeated here.

[0122] In some examples, the vehicle is a vehicle with a unibody, which omits the independent chassis and the frame is both the body and the chassis, and relies entirely on the frame body to withstand the impact of the undulating road surface and the load, so the unibody design is more difficult, and the requirements for material strength and structural design are higher. The unibody structure is mostly stamped from a steel plate, which uses multiple layers of steel plates to improve overall strength, and uses special geometry to differentiate stress, achieving the purpose of improving the flexibility and rigidity of the frame. The unibody cancels the independent beam design, which can effectively reduce the chassis, so that the engine, transmission, and suspension are closer to the ground, so the unibody has advantages in fuel economy and handling, and is also superior in interior space utilization.

[0123] The unibody structure gives the vehicle high overall flexibility through flexible design, making the vehicle more suitable for driving on good roads, providing sufficient comfort and safety protection for drivers and passengers, but the pursuit of flexibility also means that it does not have enough rigid structure to cope with the impact of non-paved roads. Metal materials are not worried about hard collision, but are very worried about bending and twisting. The unibody lacks rigid resistance structure and can only rely on metal flexibility to resist impact force. High-frequency non-uniform torsion can cause metal fatigue in the steel plate of the unibody, making the thin steel plate of the unibody "loose", that is, the vehicle will also have the phenomenon of "osteoporosis" with use.

[0124] In order to avoid the phenomenon of cyclic stress concentration and at the same time enhance the transmission structure of the unibody pickup truck and improve the torsional stiffness, the structure design of the pure electric pickup truck is very different from that of the traditional fuel pickup truck. First of all, the integration of the battery pack and the body is crucial. The battery pack is generally designed in a relatively flat place at the bottom of the vehicle, which reduces the center of gravity and improves driving stability, but it also sacrifices some space of the cargo box to some extent. The weight of the battery pack accounts for a large proportion of the overall vehicle, so in order to balance the weight of the battery pack, more battery pack connection points need to be introduced during the design of the vehicle body to increase the force transmission path, and higher strength steel or aluminum alloy needs to be used to reduce the weight of the vehicle body and improve the endurance and power output capability.

[0125] Please refer to Figure 1 The vehicle can include a front compartment 310, a passenger compartment 330, and a cargo box 350 arranged along the length direction of the vehicle. The front compartment 310 can be used to install components such as an engine, the passenger compartment 330 can be used for passengers to sit, and the cargo box 350 can be used to carry goods.

[0126] The vehicle includes two rear longitudinal beams 100, for ease of distinction, define the two rear longitudinal beams as a first rear longitudinal beam 110 and a second rear longitudinal beam 120, the two rear longitudinal beams 100, i.e., the first rear longitudinal beam 110 and the second rear longitudinal beam 120, are arranged along the width direction of the vehicle, and the battery pack 200 is connected with the two rear longitudinal beams.

[0127] In some embodiments, the vehicle further includes a cargo box 350, the cargo box 350 is located on the side of the rear longitudinal beam 100 away from the ground, and at least part of the battery pack 200 is arranged below the cargo box 350.

[0128] In some embodiments, the vehicle further includes a passenger compartment 330, the passenger compartment 330 and the cargo box 350 are arranged along the length direction of the vehicle body, the first part 210 of the battery pack 200 is installed below the passenger compartment 330, the second part 230 of the battery pack 200 is installed below the cargo box 350, the rear longitudinal beam 100 is configured as two, the two rear longitudinal beams 100 are arranged along the width direction of the vehicle, and at least part of the second part 230 is located between the two rear longitudinal beams 100.

[0129] The vehicle can be a fuel automobile, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and the present disclosure does not make specific limitations thereon.

[0130] In the description of the present application, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0131] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0132] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0133] The above is only the preferred embodiment of the present application, and does not limit the present application in any form, but any modification, equivalent change and modification of the above embodiment according to the technical essence of the present application, which does not deviate from the technical solution content of the present application, still belongs to the scope of the technical solution of the present application.

Claims

1. A vehicle body, characterized by, The vehicle body comprises: a threshold beam (410); a rear longitudinal beam (100) connected to one end of the threshold beam (410) toward the rear of the vehicle, the rear longitudinal beam (100) being configured to be connected to a battery pack (200).

2. The vehicle body according to claim 1, characterized by The vehicle body further comprises a connecting bracket (600), one end of the connecting bracket (600) being connected to the rear longitudinal beam (100), and the other end of the connecting bracket (600) being configured to be connected to the battery pack (200).

3. The vehicle body of claim 2, wherein, The connecting bracket (600) comprises a first connecting member (610) and a second connecting member (630) connected to each other, the first connecting member (610) being connected to the rear longitudinal beam (100), and the second connecting member (630) comprising a first connecting end (631) and a second connecting end (633), both of which are configured to be connected to the battery pack (200), and the first connecting end (631) and the second connecting end (633) are spaced apart in the height direction of the vehicle body.

4. The vehicle body of claim 2, wherein, The vehicle body further comprises a rear cross beam (700) connected to the rear longitudinal beam (100).

5. The vehicle body of claim 4, wherein, The rear cross beam (700) is configured to be connected to at least part of the battery pack (200).

6. The vehicle body of claim 4, wherein, The vehicle body further comprises a mounting seat (800), one end of the mounting seat (800) being connected to the rear cross beam, and the other end of the mounting seat (800) being configured to be connected to the battery pack.

7. The vehicle body of claim 6, wherein, The mounting seat (800) is provided in a plurality of sets, and the plurality of sets of the mounting seat (800) are spaced apart in the width direction of the vehicle.

8. A battery pack (200), characterized by, The vehicle body is applied to any one of claims 1 to 6.

9. The battery pack (200) of claim 8, wherein, The battery pack (200) comprises a first part (210) configured to be installed below a passenger compartment (330) and a second part (230) configured to be connected to the rear longitudinal beam (100).

10. The battery pack (200) of claim 9, wherein, In the width direction of the vehicle body, the width of the second part (230) is less than or equal to the width of the first part (210).

11. The battery pack of claim 9, wherein, In the width direction of the vehicle body, the first part (210) is configured to be connected to the threshold beam (410).

12. The battery pack of claim 9, wherein: The battery pack is configured to be connected to the rear longitudinal beam (100) through the connecting bracket (600) of the vehicle body.

13. The battery pack of claim 8, wherein: At least part of the battery pack (200) is configured to be connected to the rear cross beam (700) of the vehicle body, the rear cross beam (700) being connected to the rear longitudinal beam (100).

14. The battery pack of claim 13, wherein, The battery pack is configured to be connected to the rear cross beam through the mounting seat (800) of the vehicle body.

15. A vehicle characterized by comprising: The vehicle body comprises: The vehicle body is applied to any one of claims 1 to 6. The battery pack (200) is applied to any one of claims 8 to 14.

16. The vehicle of claim 15, wherein, The vehicle further comprises a cargo box (350) located on the side of the rear longitudinal beam (100) away from the ground, and at least part of the battery pack (200) is arranged below the cargo box (350).

17. The vehicle of claim 16, wherein, The vehicle further comprises a passenger cabin (330) and a cargo box (350) arranged along a length direction of the vehicle body, the first part (210) of the battery pack (200) is arranged below the passenger cabin (330), the second part (230) of the battery pack (200) is arranged below the cargo box (350), the rear longitudinal beams (100) are arranged in two, the two rear longitudinal beams (100) are arranged along a width direction of the vehicle, and at least part of the second part (230) is arranged between the two rear longitudinal beams (100).

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