Mounting protection structure for power battery and vehicle

Abstract

A mounting protection structure for a power battery (40), and a vehicle. The mounting protection structure comprises: an outer frame (10), the outer frame comprising body longitudinal beams (11), body B-pillars (12) and a rear frame cross beam (13), there being two body longitudinal beams (11) and two body B-pillars (12), the body B-pillars (12) being fixed onto the body longitudinal beams (11), and opposite ends of the rear frame cross beam (13) being respectively connected to the two body B-pillars (12); a lower support portion (20), opposite sides of the lower support portion (20) being respectively fixed on the body longitudinal beams (11); and a seat mounting bracket (30), one end of the seat mounting bracket (30) being connected to the body longitudinal beams (11), and the other end of the seat mounting bracket (30) being fixedly connected to the rear frame cross beam (13). Compared with the prior art, the mounting protection structure forms a battery mounting frame structure, and can provide all-directional protection for a power battery (40) when suffering collisions or impacts in various directions, thereby reducing damage such as battery collisions.

Description

A power battery installation protection structure and vehicle Technical Field

[0001] The present invention relates to the technical field of vehicle body structures, and in particular to a power battery installation protection structure and a vehicle. Background Art

[0002] The existing installation form of power batteries in new energy vehicles is mostly a lifting ear installation structure, which is installed on the vehicle body beam through the lifting ear. The power battery is relatively low and is prone to the risk of bottom scraping.

[0003] In the prior art, there is a battery bracket for an electric vehicle, which includes a longitudinal beam and a plurality of mounting units arranged at intervals along the longitudinal direction. The longitudinal beam is used to connect the plurality of mounting units into a whole, wherein each of the mounting units includes a cross beam and two mounting parts respectively provided at opposite ends of the cross beam, the two mounting parts are used to be fixedly connected to the electric vehicle, and a mounting groove is jointly defined between the two mounting parts and the corresponding cross beam, and the mounting groove is used for installing the battery.

[0004] In the existing technical solutions, the battery installation position is still lower than the vehicle body frame, which poses a greater risk of bottom impact; the crossbeam is a closed rectangular beam, and an additional mounting part is added, which is heavy; the battery is only in contact with and connected to the upper surface of the crossbeam, and its reliability is poor.

[0005] Application Contents

[0006] The purpose of the present invention is to provide a power battery installation protection structure and a vehicle to solve the technical problems in the prior art, which can improve the battery protection performance.

[0007] In a first aspect, the present invention provides a power battery installation protection structure, comprising:

[0008] An outer frame, the outer frame including a vehicle body longitudinal beam, a vehicle body B-pillar, and a rear frame crossbeam, wherein two vehicle body longitudinal beams and two vehicle body B-pillars are provided, the two vehicle body B-pillars correspond one-to-one to the two vehicle body longitudinal beams, the vehicle body B-pillars are fixed to the vehicle body longitudinal beams, and opposite ends of the rear frame crossbeam are respectively connected to the two vehicle body B-pillars;

[0009] A lower support portion, used to support and fix the power battery, wherein opposite sides of the lower support portion are respectively fixed to the longitudinal beam of the vehicle body;

[0010] A seat mounting bracket is located above the power battery, one end of the seat mounting bracket is connected to the vehicle body longitudinal beam, and the other end of the seat mounting bracket is fixedly connected to the rear frame cross beam.

[0011] A power battery installation and protection structure as described above, wherein preferably, the lower support portion includes a battery installation beam and a rib plate, the power battery is fixed on the battery installation beam, one side of the rib plate is fixedly connected to the battery installation beam, and the other side of the rib plate is fixedly connected to the power battery.

[0012] A power battery installation protection structure as described above, wherein preferably, the battery installation beam includes a continuous transverse plate section and a vertical plate section, the two vertical plate sections are connected to opposite sides of the transverse plate section, and the side of the vertical plate section away from the transverse plate section is folded outward to form a flange, and the flange is fixed to the power battery and the rib plate.

[0013] As described above, in a power battery installation and protection structure, preferably, a mounting ear is provided on the vehicle body longitudinal beam, a plurality of first mounting holes is provided on the battery installation cross beam, a plurality of second mounting holes is provided on the rib plate, the plurality of first mounting holes and the plurality of second mounting holes are arranged in a one-to-one correspondence, and the bolt members pass through the first mounting holes and the second mounting holes in sequence and are fixedly connected with the mounting ears through threads.

[0014] In the power battery installation and protection structure as described above, preferably, the bolt member includes a paint-scratched grounding bolt.

[0015] A power battery installation and protection structure as described above, wherein preferably, a pad is provided on the vehicle body longitudinal beam, an end of the pad away from the vehicle body longitudinal beam is connected to the rib plate, a through hole is provided through the pad in the axial direction, and the axial directions of the through hole, the first mounting hole and the second mounting hole coincide with each other.

[0016] As described above, a power battery installation protection structure, wherein preferably, the seat mounting bracket includes a first rod and a second rod overlapping each other, a plurality of second rods are provided, one end of the second rod is connected to the first rod, the other end of the second rod is connected to a third rod, the other end of the third rod is fixedly connected to the rear frame cross beam, the end of the first rod is connected to a fourth rod, and the fourth rod is fixedly connected to the vehicle body longitudinal beam.

[0017] As described above, in a power battery installation protection structure, preferably, a reinforcing rod is provided between two adjacent second rods, and a plurality of the reinforcing rods are provided, and the plurality of reinforcing rods are arranged in parallel and spaced apart, and the opposite ends of the reinforcing rod are respectively connected to the two adjacent second rods.

[0018] In the power battery installation protection structure as described above, preferably, the bottom surface of the battery installation cross beam and the bottom surface of the vehicle body longitudinal beam maintain the same horizontal height.

[0019] In a second aspect, the present invention provides a vehicle comprising the aforementioned power battery installation and protection structure.

[0020] Compared with the prior art, the power battery installation protection structure of the present invention forms a battery installation frame structure, which can provide protection for the power battery in all directions when subjected to collision impacts in all directions, reducing damage to the battery from collisions, etc. At the same time, most of the components in this battery installation frame structure utilize the vehicle's own structure, without the need for additional components. This reduces costs while reducing the weight of the vehicle body, thereby achieving the goal of lightweighting the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a perspective view of a power battery installation and protection structure provided by the present invention;

[0022] FIG2 is a bottom view of the power battery installation protection structure provided by the present invention;

[0023] FIG3 is an axonometric view of the power storage battery provided by the present invention when installed on the lower support portion;

[0024] FIG4 is a side view of the power storage battery provided by the present invention when installed on the lower support portion;

[0025] FIG5 is a perspective view of the lower support portion provided by the present invention;

[0026] FIG6 is a perspective view of a battery mounting beam provided by the present invention;

[0027] FIG7 is a perspective view of a rib plate provided by the present invention;

[0028] FIG8 is a perspective view of the cushion block provided by the present invention.

[0029] Explanation of the accompanying drawings: 10-outer frame, 11-body longitudinal beam, 12-body B-pillar, 13-rear frame cross beam, 14-mounting ear; 20-lower support part, 21-battery mounting cross beam, 211-cross plate section, 212-vertical plate section, 22-rib plate, 23-pad, 24-first mounting hole, 25-second mounting hole, 26-mounting bolt, 27-paint scraping grounding bolt, 28-through hole; 30-seat mounting bracket, 31-first rod, 32-second rod, 33-third rod, 34-fourth rod, 35-reinforcement rod; 40-power battery. Modes for Carrying Out the Invention

[0030] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention.

[0031] As shown in Figures 1 to 8, an embodiment of the present invention provides a power battery installation and protection structure for fixing and protecting a power battery 40. The power battery installation and protection structure includes an outer frame 10, a lower support portion 20, and a seat mounting bracket 30. The three are overlapped to form a frame structure to provide multi-faceted protection for the power battery 40, wherein:

[0032] The outer frame 10 includes a body longitudinal beam 11, a body B-pillar 12 and a rear frame cross beam 13. There are two body longitudinal beams 11 and two body B-pillars 12. The two body longitudinal beams 11 are symmetrically arranged. The main body of the body longitudinal beam 11 extends along the forward direction of the vehicle. A bent structure is formed at the front end of the body longitudinal beam 11. The two body B-pillars 12 correspond to the two body longitudinal beams 11 one by one. The body B-pillars 12 extend along the height direction of the vehicle. The body B-pillars 12 are fixed to the body longitudinal beam 11. The opposite ends of the rear frame cross beam 13 are respectively connected to the two body longitudinal beams 11. On the B-pillar 12, the rear frame cross member 13 extends along the width direction of the vehicle, overlapping the body longitudinal beam 11, the body B-pillar 12 and the rear frame cross member 13 to form a frame structure, which improves the strength of the battery installation point. When the body is hit, the outer frame 10 can absorb a large amount of impact force well to ensure the structural stability of the battery installation area. At the same time, the components of the outer frame 10 utilize the vehicle's own structure, and no additional components are required. This reduces the weight of the body while reducing costs, achieving the goal of lightweighting the body.

[0033] The lower support part 20 is used to support and fix the power battery 40. The opposite sides of the lower support part 20 are respectively fixed on the vehicle body longitudinal beam 11. The lower support part 20 extends along the width direction of the vehicle body. When the vehicle body is subjected to a lateral impact force, the external force is transmitted to the vehicle body longitudinal beam 11 on the other side through the lower support part 20, which is convenient for the transmission and absorption of the collision force and improves the safety collision performance. At the same time, the lower support part 20 is below the power battery 40, which can protect the bottom of the power battery 40 and prevent road obstacles from causing damage to the power battery 40 such as scraping the bottom. The bottom surface height of the lower support part 20 is consistent with the bottom surface height of the vehicle body longitudinal beam 11. The lower support part 20 lifts the power battery 40 for installation, increases the height of the power battery 40, increases the ground clearance, and reduces the risk of scraping the bottom impact; compared with the ear-type installation, the installation space is larger and it is easy to install.

[0034] The seat mounting bracket 30 is located above the power battery 40. One end of the seat mounting bracket 30 is connected to the vehicle body longitudinal beam 11, and the other end of the seat mounting bracket 30 is fixedly connected to the rear frame cross beam 13. When a collision occurs at the rear end of the vehicle body, due to the structural overlap relationship, the external force is transmitted through the rear frame cross beam 13 and the seat mounting bracket 30 and then to the vehicle body B-pillar 12. Another part of the external force is transmitted through the rear frame cross beam 13 and the seat mounting bracket 30 to the vehicle body longitudinal beam 11, thereby more effectively dispersing the impact force, greatly improving structural stability and improving safety. At the same time, the seat mounting bracket 30 can protect the power battery 40 from top to bottom.

[0035] After the power battery 40 is installed on the vehicle body, the vehicle body longitudinal beam 11, vehicle body B-pillar 12, rear frame cross beam 13, lower support portion 20 and seat mounting bracket 30 form a battery protection frame, which protects the battery from all aspects in the event of a collision and reduces damage to the battery due to collision.

[0036] Specifically, when a collision occurs in front of the power battery 40, the vehicle body longitudinal beam 11 resists the collision and acts as a buffer; when a collision occurs behind the power battery 40, the rear frame cross beam 13 and the seat mounting bracket 30 withstand the collision and transfer the collision energy to the vehicle body B-pillar 12 and the vehicle body longitudinal beam 11; when a collision occurs from the side, the frame formed by the lower support part 20, the vehicle body longitudinal beam 11, the rear frame cross beam 13 and the seat mounting bracket 30 withstand the collision energy and reduce the collision damage to the power battery 40; when a collision occurs below the power battery 40, because the lower support part 20 is lower in height, it can also effectively protect the bottom of the power battery 40.

[0037] 3 and 5 , the lower support portion 20 includes a battery mounting beam 21 and a rib plate 22. The battery mounting beam 21 extends along the width direction of the vehicle. The power battery 40 is fixed on the battery mounting beam 21. There are multiple battery mounting beams 21. The multiple battery mounting beams 21 are arranged in parallel and spaced apart along the direction of vehicle travel to provide stable and uniform support for the power battery 40. In the embodiment provided in the present application, a total of two battery mounting beams 21 are provided. The two battery mounting beams 21 and the two vehicle body longitudinal beams 11 form a grid frame structure. The grid frame structure can transfer the force acting on the vehicle body longitudinal beam 11, thereby reducing the distortion, cracking or deformation of the battery mounting area caused by stress concentration.

[0038] Furthermore, referring to FIG1 , the bottom surface of the battery mounting cross beam 21 is maintained at the same horizontal height as the bottom surface of the vehicle body longitudinal beam 11 . The battery mounting cross beam 21 supports the installation of the power battery 40 , thereby increasing the height of the power battery 40 , increasing the ground clearance, and reducing the risk of bottom scraping and collision.

[0039] As shown in Figure 7, the rib plate 22 is an "L"-shaped structure. One side of the rib plate 22 is fixedly connected to the battery mounting beam 21, and the other side of the rib plate 22 is fixedly connected to the power battery 40, so as to improve the overall installation strength of the power battery 40. When the vehicle is subjected to collision impact in all directions, the power battery 40 is prevented from falling off from the battery mounting beam 21. When the battery mounting beam 21 transmits the lateral collision force, the strength and stiffness of the battery mounting beam 21 can be effectively improved. At the same time, the stiffness of the torque path is strengthened to ensure the uniformity of the torsional stiffness, thereby improving the torsional stiffness of the battery mounting beam 21 and improving the carrying capacity of the battery mounting beam 21.

[0040] On the rib plate 22, a reinforcing surface is provided in a concave or convex manner, and the reinforcing surface is arranged parallel to the surface of the rib plate 22. The reinforcing surface is connected to the surface of the rib plate 22 through a connecting surface, and the connecting surface is arranged at an angle. When the rib plate 22 is subjected to an external force, the external force is transmitted through the connecting surface, and the connecting surface decomposes the external force into two components, one of which is perpendicular to the direction of the battery mounting beam 21, and the other is parallel to the direction of the battery mounting beam 21, thereby reducing the force applied to the rib plate 22 and improving the overall strength.

[0041] 6 , the battery mounting cross beam 21 includes a continuous cross plate section 211 and a vertical plate section 212. The vertical plate section 212 extends in the height direction of the vehicle. The two vertical plate sections 212 are connected to opposite sides of the cross plate section 211. Preferably, the vertical plate section 212 and the cross plate section 211 are integrally formed to improve the overall strength. The battery mounting cross beam 21 is formed into a hollow structure, thereby reducing the weight of the battery mounting cross beam 21 and further reducing the weight of the vehicle, thereby realizing a lightweight design of the structure. The side of the vertical plate section 212 away from the cross plate section 211 is folded outward to form a flange, which is welded and fixed to the power battery 40 and the rib plate 22, thereby ensuring the reliability of the connection between the battery mounting cross beam 21 and the power battery 40.

[0042] 1 , 3 , 5 , 6 , and 7 , the vehicle body longitudinal beam 11 is provided with mounting ears 14, which are preferably fixed by welding. The battery mounting crossbeam 21 is provided with a plurality of first mounting holes 24, and the rib plate 22 is provided with a plurality of second mounting holes 25. The plurality of first mounting holes 24 and the plurality of second mounting holes 25 are arranged in a one-to-one correspondence. Bolts pass through the first mounting holes 24 and the second mounting holes 25 in sequence and are then threadedly fixedly connected with the mounting ears 14. The mounting ears 14 provide a mounting base for fixing the battery mounting crossbeam 21. For different vehicle models, the size and specifications of the batteries may vary, and the spacing between the vehicle body longitudinal beams 11 may also change. By providing the mounting ears 14 on the vehicle body longitudinal beam 11, the installation position of the mounting ears 14 can be adjusted according to the change of the vehicle model, so that battery mounting crossbeams 21 of different sizes can be adaptively installed on the vehicle body longitudinal beam 11, thereby improving the commonality of parts and reducing production costs.

[0043] 5 and 8 , a pad 23 is provided on the vehicle body longitudinal beam 11, and one end of the pad 23 away from the vehicle body longitudinal beam 11 is connected to the rib plate 22, and the opposite ends of the pad 23 are respectively connected to the rib plate 22 and the vehicle body longitudinal beam 11. A through hole 28 is provided through the pad 23 in the axial direction, and the axial directions of the through hole 28, the first mounting hole 24 and the second mounting hole 25 coincide with each other. The bolt member passes through the first mounting hole 24, the through hole 28 and the second mounting hole 25 in sequence and is threadedly connected to the mounting ear 14. The pad 23 plays a role in supporting the rib plate 22, thereby improving the overall strength of the fixed position of the rib plate 22.

[0044] In a feasible embodiment, as shown in Figure 3, the bolt assembly includes a mounting bolt 26 and a paint scraping grounding bolt 27. The mounting ear 14 has a threaded structure corresponding to the mounting bolt 26 and the paint scraping grounding bolt 27. There are multiple mounting bolts 26, and the multiple mounting bolts 26 are evenly distributed, thereby improving the connection strength and ensuring the connection reliability between the battery mounting beam 21 and the mounting ear 14. The paint scraping grounding bolt 27 has a conductive function, and at least one is provided to achieve equipotential connection between the power battery 40 and the vehicle body, saving the cost of the grounding wire and improving the battery grounding conductivity.

[0045] As shown in Figure 1 , the seat mounting bracket 30 includes a first rod 31 and a second rod 32 that overlap each other. Multiple second rods 32 are provided, one end of each second rod 32 being connected to the first rod 31. Both the first and second rods 31 and 32 are positioned above the power battery 40, forming a frame structure that effectively resists top-down forces, improves vehicle body rigidity, facilitates the transmission and absorption of collision forces, and enhances crash safety. The other end of the second rod 32 is connected to a third rod 33, the other end of which is fixedly connected to the rear frame cross member 13. The end of the first rod 31 is connected to a fourth rod 34, which is fixedly connected to the mounting ear 14. By connecting the third and fourth rods 33 and 34 to the rear frame cross member 13 and the mounting ear 14, respectively, the frame structure formed by the first and second rods 31 and 32 is positioned at a predetermined height, protecting the area above the power battery 40 while preventing interference with other vehicle body components.

[0046] The frame structure formed by the seat mounting bracket 30 itself and its simultaneous connection to the rear frame cross beam 13 and the body longitudinal beam 11, when the rear frame cross beam 13 and / or the body longitudinal beam 11 are subjected to force, the seat mounting bracket 30 with a grid frame structure can transfer the force applied to the rear frame cross beam 13 and / or the body longitudinal beam 11, thereby reducing the force range of the rear frame cross beam 13 and / or the body longitudinal beam 11 and reducing the distortion, cracking or deformation of the battery installation area due to stress concentration.

[0047] Furthermore, a reinforcing rod 35 is provided between two adjacent second rods 32, and a plurality of reinforcing rods 35 are provided. The reinforcing rods 35 extend in the width direction of the vehicle, and the plurality of reinforcing rods 35 are arranged in parallel and spaced apart. The opposite ends of the reinforcing rod 35 are respectively connected to the two adjacent second rods 32. The reinforcing rod 35, the first rod 31 and the rear frame cross member 13 form a "multi-horizontal and multi-vertical" grid frame structure, which has more force transmission paths, improves the structural strength, can effectively improve the performance of resisting side collisions, and ensure the structural stability of the battery installation area.

[0048] Based on the above embodiments, the present invention further provides a vehicle including the aforementioned power battery installation and protection structure, which has the following advantages:

[0049] 1. The power battery 40 is installed in a beam-type manner, which increases the height of the power battery 40 and the ground clearance of the vehicle, reducing the risk of bottom-scratching collisions. The battery installation beam 21 is located at the bottom of the power battery 40, which can withstand bottom impacts and protect the power battery 40. The beam-type installation has a larger operating space than the eye-type installation and is easier to install.

[0050] 2. A paint scraping grounding bolt 27 is added to achieve equipotential connection between the power battery 40 and the vehicle body, saving grounding wire costs and improving battery grounding conductivity.

[0051] 3. The body longitudinal beam 11, the body B-pillar 12 and the rear frame crossbeam 13 are overlapped to form a frame structure, which improves the strength of the battery installation point. When the body is hit, the outer frame 10 can well absorb a large amount of impact force, ensuring the structural stability of the battery installation area.

[0052] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the scope of implementation of the present invention is not limited to what is shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which do not exceed the spirit covered by the description and drawings, should be within the scope of protection of the present invention.

Claims

1. A power battery installation protection structure, characterized in that Comprising: An outer frame, the outer frame includes vehicle body longitudinal beams, vehicle body B-pillars, and a rear frame cross beam. There are two vehicle body longitudinal beams and two vehicle body B-pillars. The two vehicle body B-pillars correspond to the two vehicle body longitudinal beams one by one. The vehicle body B-pillars are fixed to the vehicle body longitudinal beams, and the opposite ends of the rear frame cross beam are respectively connected to the two vehicle body B-pillars; A lower support part for supporting and fixing a power battery. The opposite sides of the lower support part are respectively fixed to the vehicle body longitudinal beams; A seat mounting bracket located above the power battery. One end of the seat mounting bracket is connected to the vehicle body longitudinal beam, and the other end of the seat mounting bracket is fixedly connected to the rear frame cross beam.

2. The power battery installation protection structure according to claim 1, wherein The lower support part includes a battery mounting cross beam and a rib plate. The power battery is fixed to the battery mounting cross beam. One side of the rib plate is fixedly connected to the battery mounting cross beam, and the other side of the rib plate is fixedly connected to the power battery.

3. The power battery installation protection structure according to claim 2, wherein, The battery mounting cross beam includes a continuous horizontal plate section and vertical plate sections. The two vertical plate sections are connected to the opposite sides of the horizontal plate section. The side of the vertical plate section away from the horizontal plate section is turned outwards to form a flange, and the flange is fixed to the power battery and the rib plate.

4. The power battery installation protection structure according to claim 2, characterized in that, Mounting ears are provided on the vehicle body longitudinal beams. A plurality of first mounting holes are provided on the battery mounting cross beam. A plurality of second mounting holes are provided on the rib plate. The plurality of first mounting holes and the plurality of second mounting holes are arranged in one-to-one correspondence. A bolt member sequentially passes through the first mounting hole, the second mounting hole and is threadedly fixed to the mounting ear.

5. The power battery installation protection structure according to claim 4, characterized in that, The bolt member includes a paint scraping grounding bolt.

6. The power battery installation protection structure according to claim 4, characterized in that A cushion block is provided on the vehicle body longitudinal beam. The end of the cushion block away from the vehicle body longitudinal beam is connected to the rib plate. A through hole is provided through the cushion block in the axial direction of the cushion block. The axial directions of the through hole, the first mounting hole and the second mounting hole coincide.

7. The power battery installation protection structure according to claim 1, characterized in that The seat mounting bracket includes a first rod body and a second rod body that overlap each other. There are a plurality of second rod bodies. One end of the second rod body is connected to the first rod body. The other end of the second rod body is connected to a third rod body. The other end of the third rod body is fixedly connected to the rear frame cross beam. The end of the first rod body is connected to a fourth rod body, and the fourth rod body is fixedly connected to the vehicle body longitudinal beam.

8. The power battery installation protection structure according to claim 7, characterized in that, Wherein, a reinforcing rod body is provided between two adjacent second rod bodies. There are a plurality of reinforcing rod bodies. The plurality of reinforcing rod bodies are arranged in parallel at intervals. The opposite ends of the reinforcing rod body are respectively connected to two adjacent second rod bodies.

9. The power battery installation protection structure according to claim 2, characterized in that The bottom surface of the battery mounting cross beam is at the same horizontal height as the bottom surface of the vehicle body longitudinal beam.

10. A vehicle, characterized in that, Including the power battery installation and protection structure according to any one of claims 1-9.

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