Electric vehicle battery lifting device and control method

Abstract

The present invention provides an electric vehicle battery lifting device and control method, which includes a vehicle frame, a battery rack movably disposed at the bottom of the frame, a height adjustment assembly disposed at the bottom of the frame, a control assembly electrically connected to the height adjustment assembly, and a detection assembly electrically connected to the control assembly. The battery rack is used to place batteries and can move up and down relative to the vehicle frame; the height adjustment assembly is transmission-connected to the battery rack and can drive the battery rack to move up and down; the detection assembly can detect the terrain of the ground in front of the frame and convert it into an electrical signal; the control assembly can obtain the electrical signal and issue a command to the height adjustment assembly based on the electrical signal to achieve automatic adjustment of the battery height. The present invention has a simple structure, a fast battery lifting speed, and can automatically control the up and down movement of the battery rack, thereby improving the degree of automation, giving full play to the safety of the low center of gravity, and can promptly avoid battery collisions caused by the low center of gravity, thereby improving driving safety and having strong practicality.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to an electric vehicle battery lifting device and a control method. Background Art

[0002] With the enhancement of environmental protection concepts and the development of science and technology, new energy will gradually replace the dominant position of traditional energy. From the perspective of the total global primary energy consumption, oil accounts for the highest proportion, and more than 50% of oil consumption is used in the transportation sector. Therefore, people pay attention to the replacement of old and new energy with new energy in the transportation sector. Once the new energy vehicle industry matures, it will absorb extremely large funds, manpower and material resources. The core kinetic energy of new energy vehicles during operation is still provided by new energy vehicle batteries; power batteries are the main components of electric vehicles and are installed on the vehicle chassis. However, the battery structure in the existing technology is single and has no other functions except providing electricity. It is impossible to properly adjust the height of the vehicle's center of gravity, which is not conducive to improving the stability of the vehicle.

[0003] Patent document 202011419373.4 proposes a battery rack with adjustable center of gravity based on the vehicle's speed. The rack comprises a housing, a heat sink, guide rails, a battery pack height adjustment mechanism, and a battery pack auxiliary push mechanism. The housing has a heat sink fixed to one side, the guide rails are distributed and fixed within the housing, and the battery pack height adjustment mechanism is fixed between the guide rails. The battery pack auxiliary push mechanism is located on the battery pack height adjustment mechanism. Through the battery pack auxiliary push mechanism, all wedge-shaped movable plates contact the battery pack, and the wedge-shaped movable plates jointly push the battery pack toward the hydraulic cylinder, lowering the vehicle's center of gravity. When the vehicle's center of gravity is adjusted to the optimal position, the electric push rods are controlled to stop operating, maintaining the battery pack position and thus the vehicle's center of gravity. By lowering the vehicle's center of gravity, the vehicle provides good stability, making it less likely to roll over when traveling at high speeds. However, the aforementioned battery rack still suffers from complex structure, slow battery height adjustment, inability to automatically adjust battery height, and inability to immediately raise the battery height in an emergency to prevent battery collisions.

[0004] In view of this, it is necessary to design an improved battery lifting device to solve the above-mentioned problems of complex structure, slow lifting speed and low degree of automation. Summary of the Invention

[0005] The purpose of the present invention is to provide an electric vehicle battery lifting device and control method, which can automatically control the up and down movement of the battery rack, improve the degree of automation, give full play to the safety of the low center of gravity, and promptly avoid battery collisions caused by the low center of gravity, thereby improving driving safety.

[0006] To achieve the above-mentioned purpose of the invention, on the one hand, the present invention provides an electric vehicle battery lifting device, comprising a frame, a battery rack movably arranged at the bottom of the frame, a height adjustment component arranged at the bottom of the frame, a control component electrically connected to the height adjustment component, and a detection component electrically connected to the control component, wherein the battery rack is used to place batteries and can move up and down relative to the frame; the height adjustment component is transmission-connected to the battery rack and can drive the battery rack to move up and down; the detection component can detect the terrain of the ground in front of the frame and convert it into an electrical signal; the control component can obtain the electrical signal and issue an instruction to the height adjustment component based on the electrical signal to achieve automatic adjustment of the battery height.

[0007] As a further improvement of the present invention, the height adjustment assembly includes a plurality of sliding posts vertically arranged on the bottom surface of the frame, and sliding sleeves correspondingly mounted on the outer periphery of the sliding posts and fixedly connected to the battery rack to limit the movement direction of the battery rack relative to the frame.

[0008] As a further improvement of the present invention, the height adjustment assembly also has an "L"-shaped sliding column fixing arm, which has a horizontal arm and a vertical arm that are perpendicular to each other. One end of the vertical arm is vertically arranged at the bottom of the frame, and the horizontal arm extends toward the inside of the frame. The sliding column is arranged on the upper side of the horizontal arm.

[0009] As a further improvement of the present invention, the height adjustment assembly further includes an elastic member, which is sleeved on the sliding column and supported between the sliding column fixing arm and the sliding sleeve.

[0010] As a further improvement of the present invention, the height adjustment assembly also includes a hydraulic driver arranged on the frame and located above the slide column, and the output shaft of the hydraulic driver abuts against the top surface of the slide sleeve to cooperate with the elastic member to drive the battery rack to move up and down.

[0011] As a further improvement of the present invention, a limiter is provided at the end of the output shaft of the hydraulic driver, and a blind hole of a fixed depth is opened at the center of the bottom of the limiter.

[0012] As a further improvement of the present invention, the height adjustment assembly also includes a locker, which includes a plurality of claws arranged on the sliding column or a locking hoop arranged on the sliding sleeve, and the claws can extend from the outer peripheral surface of the sliding column and press against the inner wall of the blind hole; the locking hoop surrounds the outer periphery of the sliding column and can contract to clamp the sliding column.

[0013] As a further improvement of the present invention, the detection component includes a laser radar and / or a millimeter wave radar arranged in front of the frame.

[0014] As a further improvement of the present invention, the detection component further includes a distance sensor arranged on the top of the battery rack, and the distance sensor can detect the distance between the battery rack and the bottom of the vehicle frame.

[0015] As a further improvement of the present invention, the detection component further includes a speed sensor, which can detect the moving speed of the frame on the ground.

[0016] On the other hand, the present invention also provides a control method for an electric vehicle battery lifting device, comprising the following steps:

[0017] S1: LiDAR and / or millimeter-wave radar detects the terrain on the bottom surface in front of the frame, the distance sensor detects the distance between the battery rack and the bottom of the frame, and the speed sensor detects the moving speed of the frame on the ground;

[0018] S2: The control component calculates an appropriate ground clearance of the battery rack at the current vehicle speed based on the detection data of the speed sensor;

[0019] S3: The control component determines the actual height of the battery rack from the ground based on the detection data of the distance sensor;

[0020] S4: The control component compares the appropriate ground clearance with the actual ground clearance. If they are different, a command is sent to the hydraulic driver, which drives the battery rack to move up and down to reach the appropriate position. If they are the same, no command is sent.

[0021] S5: The control component determines the required safe ground clearance height of the battery rack based on the detection data of the laser radar and / or millimeter wave radar;

[0022] S6: The control component compares the safe ground clearance with the current ground clearance. If the safe ground clearance is greater than the current ground clearance, a command is sent to the hydraulic driver, which releases the sleeve to raise the battery rack to a suitable position.

[0023] The beneficial effects of the present invention are:

[0024] 1. The electric vehicle battery lifting device of the present invention directly drives the battery rack to move up and down by setting a height adjustment component. It has a simple structure and a fast battery lifting speed. In addition, a detection component is set to detect the terrain and is electrically connected to the control component. It can automatically control the up and down movement of the battery rack, improve the degree of automation, give full play to the safety of the low center of gravity, and can timely avoid battery collisions caused by the low center of gravity, thereby improving driving safety and having strong practicality.

[0025] 2. By setting the sliding column, sliding sleeve and sliding column fixing arm, the movement direction of the battery rack can be restricted, the activity space of the battery rack can be reasonably arranged, and the effect of lowering the center of gravity brought about by the up and down movement of the battery rack can be enhanced.

[0026] 3. By setting up hydraulic drivers, elastic parts, limiters and lockers, the battery rack can be moved up and down, the battery rack can be controlled to move within a reasonable range, and the battery rack can be rigidly limited to avoid battery resonance damage, which is highly practical.

[0027] 4. By setting up laser radar and / or millimeter wave radar, it is possible to detect the terrain and judge whether the battery rack should be raised to avoid possible collisions. The battery rack can be automatically raised to avoid risks, fully protecting the battery and having strong practicality.

[0028] 5. By setting up a distance sensor, the position of the battery rack relative to the vehicle frame can be known, providing a data basis for the up and down movement of the battery rack, avoiding incorrect driving of the hydraulic drive, and ensuring the normal operation of the electric vehicle battery lifting device, which is highly practical.

[0029] 6. By setting up a speed sensor, the driving speed of the electric vehicle can be detected, and a suitable battery rack height from the ground can be calculated accordingly, reducing the risk of collision due to the battery rack being at a low height from the ground for a long time, avoiding unnecessary battery damage, and having strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of the electric vehicle battery lifting device of the present invention;

[0031] Figure 2 for Figure 1 A partial cross-sectional view of

[0032] Figure 3 Schematic diagram of the structure of the claw;

[0033] Figure 4 Schematic diagram of the structure of the locking hoop;

[0034] Figure 5 This is a logical diagram of the electrical connection between the detection component, control component and hydraulic driver.

[0035] Reference numerals:

[0036] 100-Electric vehicle battery lifting device; 32-Sliding sleeve; 37-Locking hoop;

[0037] 1-frame; 33-sliding column fixed arm; 51-laser radar;

[0038] 2-battery rack; 34-elastic member; 52-millimeter wave radar;

[0039] 3-height adjustment assembly; 35-hydraulic actuator; 53-distance sensor;

[0040] 4-control component; 351-limiter; 54-speed sensor.

[0041] 5-detection component; 3511-blind hole;

[0042] 31- slide column; 36- claw; DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] It should also be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0045] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0046] See also Figure 1 and Figure 5 As shown, an electric vehicle battery lifting device 100 of the present invention includes a vehicle frame 1, a battery rack 2 movably mounted at the bottom of the vehicle frame 1, a height adjustment assembly 3 mounted at the bottom of the vehicle frame 1, a control assembly 4 electrically connected to the height adjustment assembly 3, and a detection assembly 5 electrically connected to the control assembly 4. The battery rack 2 is used to place batteries and can move up and down relative to the vehicle frame 1; the height adjustment assembly 3 is transmission-connected to the battery rack 2 and can drive the battery rack 2 to move up and down; the detection assembly 5 can detect the terrain in front of the vehicle frame 1 and convert it into an electrical signal; the control assembly 4 can obtain the electrical signal and issue a command to the height adjustment assembly 3 based on the electrical signal to achieve automatic adjustment of the battery height. The electric vehicle battery lifting device 100 of the present invention directly drives the battery rack 2 up and down by providing the height adjustment assembly 3. It has a simple structure and a fast battery lifting speed. The detection assembly 5 is provided to detect the terrain and is electrically connected to the control assembly 4. It can automatically control the up and down movement of the battery rack 2, improve the degree of automation, give full play to the safety of the low center of gravity, and promptly avoid battery collision caused by the low center of gravity, thereby improving driving safety and having strong practicality.

[0047] Specifically, see Figure 2As shown, the height adjustment assembly 3 includes multiple slide posts 31 vertically mounted on the bottom surface of the vehicle frame 1, and sleeves 32 correspondingly mounted on the periphery of the slide posts 31 and fixedly connected to the battery rack 2 to restrict the movement of the battery rack 2 relative to the vehicle frame 1. The height adjustment assembly 3 also has an L-shaped slide post fixing arm 33, which comprises a horizontal arm and a vertical arm perpendicular to each other. One end of the vertical arm is vertically mounted on the bottom surface of the vehicle frame 1, while the horizontal arm extends inwardly of the vehicle frame 1. The slide posts 31 are mounted on the upper side of the horizontal arm. By configuring the slide posts 31, sleeves 32, and slide post fixing arm 33, the movement direction of the battery rack 2 can be restricted, the space for the battery rack 2 to move can be rationally arranged, and the effect of lowering the center of gravity caused by the vertical movement of the battery rack 2 can be enhanced, resulting in a highly practical design.

[0048] Specifically, see Figure 2 As shown, the height adjustment assembly 3 also includes an elastic member 34, which is mounted on the sliding post 31 and supported between the sliding post fixed arm 33 and the sliding sleeve 32. The height adjustment assembly 3 also includes a hydraulic actuator 35, which is mounted on the vehicle frame 1 and located above the sliding post 31. The output shaft of the hydraulic actuator 35 abuts the top surface of the sliding sleeve 32 to cooperate with the elastic member 34 to drive the battery rack 2 up and down. A limiter 351 is provided at the end of the output shaft of the hydraulic actuator 35. A blind hole 3511 of a fixed depth is defined at the center of the bottom of the limiter 351. By providing the hydraulic actuator 35, the elastic member 34, and the limiter 351, the battery rack 2 can be moved up and down, and its movement can be controlled within a reasonable range, which is highly practical.

[0049] In a specific embodiment, the elastic member 34 is a straight spring.

[0050] Specifically, see Figure 3 and Figure 4 As shown, the height adjustment assembly 3 also includes a locker, which includes multiple claws 36 provided on the slide post 31 or a locking collar 37 provided on the sleeve 32. The claws 36 can extend from the outer circumference of the slide post 31 and press against the inner wall of the blind hole 3511; the locking collar 37 surrounds the outer circumference of the slide post 31 and can retract to clamp the slide post 31. The provision of the locker can rigidly fix the battery rack 2, prevent resonance of the battery rack 2, reduce fatigue damage to the batteries caused by resonance, and extend battery life, thus enhancing practicality.

[0051] Specifically, see Figure 5 As shown, the detection assembly 5 includes a laser radar 51 and / or millimeter-wave radar 52 disposed in front of the vehicle frame 1. The laser radar 51 and / or millimeter-wave radar 52 can detect the terrain and, based on this, determine whether the battery rack 2 should be raised to avoid a possible collision. This enables the battery rack 2 to automatically rise to avoid danger, fully protecting the batteries and providing strong practicality.

[0052] Specifically, see Figure 1 As shown, the detection assembly 5 also includes a distance sensor 53 disposed on the top of the battery rack 2. The distance sensor 53 can detect the distance between the battery rack 2 and the bottom of the vehicle frame 1. By providing the distance sensor 53, the position of the battery rack 2 relative to the vehicle frame 1 can be determined, providing a data basis for the up and down movement of the battery rack 2, avoiding erroneous actuation of the hydraulic actuator 35, and ensuring the normal operation of the electric vehicle battery lifting device 100, thus enhancing practicality.

[0053] In a specific embodiment, the distance sensor 53 is an infrared sensor.

[0054] Specifically, see Figure 5 As shown, the detection assembly 5 also includes a speed sensor 54, which can detect the speed of the frame 1 moving on the ground. By providing the speed sensor 54, the speed of the electric vehicle can be detected and an appropriate height of the battery rack 2 above the ground can be calculated accordingly, reducing the risk of collision caused by the battery rack 2 being at a low height for a long time and avoiding unnecessary battery damage.

[0055] See also Figure 5 The control method of the electric vehicle battery lifting device of the present invention includes the following steps:

[0056] S1: The laser radar 51 and / or millimeter wave radar 52 detects the terrain on the bottom surface in front of the frame 1, the distance sensor 53 detects the distance between the battery rack 2 and the bottom of the frame 1, and the speed sensor 54 detects the moving speed of the frame 1 on the ground;

[0057] S2: The control component 4 calculates an appropriate ground clearance of the battery rack 2 at the current vehicle speed based on the detection data of the speed sensor 54;

[0058] S3: The control component 4 determines the actual height of the battery rack 2 from the ground based on the detection data of the distance sensor 53;

[0059] S4: The control component 4 compares the appropriate ground clearance with the actual ground clearance. If they are different, the control component 4 sends a command to the hydraulic driver 35, which drives the battery rack 2 to move up and down to reach the appropriate position. If they are the same, no command is sent.

[0060] S5: The control component 4 determines the required safe ground clearance of the battery rack 2 based on the detection data of the laser radar 51 and / or the millimeter wave radar 52;

[0061] S6: The control component 4 compares the safe ground clearance with the current ground clearance. If the safe ground clearance is greater than the current ground clearance, a command is sent to the hydraulic driver 35. The hydraulic driver 35 releases the sleeve 32 to raise the battery rack 2 to a suitable position.

[0062] In a specific embodiment, the speed sensor 54 detects once every 15 seconds; the laser radar 51 and the millimeter wave radar 52 feed back detection data once every 0.5 seconds.

[0063] The control method of the electric vehicle battery lifting device can realize intelligent control of the height of the battery rack 2 from the ground by collecting and processing information on terrain, vehicle speed and the position of the battery rack 2, giving full play to the safety of the low center of gravity and timely avoiding battery collisions caused by the low center of gravity, thereby improving driving safety and being highly practical.

[0064] In summary, the present invention has a simple structure and a fast battery lifting speed. It can automatically control the up and down movement of the battery rack 2, improve the degree of automation, give full play to the safety of the low center of gravity, and timely avoid battery collisions caused by the low center of gravity, thereby improving driving safety. It reasonably arranges the activity space of the battery rack 2 to enhance the effect of lowering the center of gravity caused by the up and down movement of the battery rack 2. It can reduce the fatigue damage to the battery caused by resonance, avoid battery damage, and extend the battery life.

[0065] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. An electric vehicle battery lifting device, characterized in that: The vehicle comprises a frame (1), a battery rack (2) movably arranged at the bottom of the frame (1), a height adjustment component (3) arranged at the bottom of the frame (1), a control component (4) electrically connected to the height adjustment component (3), and a detection component (5) electrically connected to the control component (4), wherein the battery rack (2) is used to place batteries and can move up and down relative to the frame (1); the height adjustment component (3) is transmission-connected to the battery rack (2) and can drive the battery rack (2) to move up and down; the detection component (5) can The topography of the ground in front of the vehicle frame (1) is detected and converted into an electrical signal; the control component (4) is capable of acquiring the electrical signal and issuing an instruction to the height adjustment component (3) based on the electrical signal to achieve automatic adjustment of the battery height; the height adjustment component (3) includes a plurality of slide posts (31) vertically arranged on the bottom surface of the vehicle frame (1), and a sliding sleeve (32) correspondingly sleeved on the outer periphery of the slide posts (31) and fixedly connected to the battery rack (2) to limit the movement direction of the battery rack (2) relative to the vehicle frame (1); The height adjustment assembly (3) further includes a locker, which includes a plurality of claws (36) provided on the slide column (31) or a locking hoop (37) provided on the slide sleeve (32); The height adjustment assembly (3) further comprises an L-shaped slide column fixing arm (33), wherein the slide column fixing arm (33) comprises a horizontal arm and a vertical arm perpendicular to each other, wherein one end of the vertical arm is vertically arranged at the bottom of the vehicle frame (1), the horizontal arm extends toward the inner side of the vehicle frame (1), and the slide column (31) is arranged on the upper side of the horizontal arm; The height adjustment assembly (3) further comprises an elastic member (34) and a hydraulic driver (35) arranged on the vehicle frame (1) and located above the slide column (31); the elastic member (34) is sleeved on the slide column (31) and supported between the slide column fixing arm (33) and the slide sleeve (32); the output shaft of the hydraulic driver (35) abuts against the top surface of the slide sleeve (32) to cooperate with the elastic member (34) to drive the battery rack (2) to move up and down; The detection component (5) includes a laser radar (51) and / or a millimeter wave radar (52) arranged in front of the vehicle frame (1).

2. The electric vehicle battery lifting device according to claim 1, characterized in that: A limiter (351) is provided at the end of the output shaft of the hydraulic driver (35), and a blind hole (3511) of a fixed depth is opened at the center of the bottom of the limiter (351).

3. The electric vehicle battery lifting device according to claim 2, characterized in that: The claw (36) can extend from the outer peripheral surface of the sliding column (31) and press against the inner wall of the blind hole (3511); the locking hoop (37) surrounds the outer periphery of the sliding column (31) and can be contracted to clamp the sliding column (31).

4. The electric vehicle battery lifting device according to claim 1, characterized in that: The detection component (5) further comprises a distance sensor (53) arranged on the top of the battery rack (2), and the distance sensor (53) is capable of detecting the distance between the battery rack (2) and the bottom of the vehicle frame (1).

5. The electric vehicle battery lifting device according to claim 4, characterized in that: The detection assembly (5) further comprises a speed sensor (54), and the speed sensor (54) is capable of detecting the moving speed of the frame (1) on the ground.

6. A control method for the electric vehicle battery lifting device according to claim 5, characterized in that: The following steps are involved: S1: The laser radar (51) and / or millimeter wave radar (52) detects the terrain of the bottom surface in front of the vehicle frame (1), the distance sensor (53) detects the distance between the battery rack (2) and the bottom of the vehicle frame (1), and the speed sensor (54) detects the moving speed of the vehicle frame (1) on the ground; S2: The control component (4) calculates a suitable ground clearance of the battery rack (2) at the current vehicle speed based on the detection data of the speed sensor (54); S3: The control component (4) determines the actual height of the battery rack (2) from the ground based on the detection data of the distance sensor (53); S4: The control component (4) compares the appropriate height from the ground with the actual height from the ground. If they are different, a command is sent to the hydraulic driver (35), and the hydraulic driver (35) drives the battery rack (2) to move up and down to reach the appropriate position; if they are the same, no command is sent; S5: The control component (4) determines the required safe height above the ground for the battery rack (2) based on the detection data of the laser radar (51) and / or the millimeter wave radar (52); S6: The control component (4) compares the safe ground clearance with the current ground clearance. If the safe ground clearance is greater than the current ground clearance, a command is sent to the hydraulic driver (35), and the hydraulic driver (35) releases the sliding sleeve (32) to allow the battery rack (2) to rise to a suitable position.

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