Vehicle suspension vibration energy recovery device and vehicle

Abstract

The utility model is suitable for the technical field of vehicle suspensions, and provides a vehicle suspension vibration energy recovery device and a vehicle, and the vehicle suspension vibration energy recovery device comprises a power battery used for providing electric energy for the vehicle; a first storage battery; the hydraulic shock absorber set is connected with the power battery and the first storage battery, the first storage battery is used for exchanging electric energy with the hydraulic shock absorber set, and the output voltage of the first storage battery is equal to the working voltage of the hydraulic shock absorber set; when the bidirectional direct-current converter fails, power can be supplied to the shock absorber based on the first storage battery, and the working stability of the shock absorber is guaranteed.

Description

Technical Field

[0001] This application belongs to the technical field of vehicle suspensions, and particularly relates to a vehicle suspension vibration energy recovery device and a vehicle. Background Art

[0002] The hydraulic shock absorber is an important part of an automotive suspension. To improve the safety and comfort of driving and riding, it is necessary to frequently adjust the height of the hydraulic shock absorber to adjust the body posture. Currently, electric vehicles are usually designed with a power battery and a storage battery for a low-voltage electrical system, such as powering the vehicle's lighting, audio, ignition system, and sensors. The output voltage of the storage battery is relatively small, usually 12V. Currently, the vehicle's power battery is usually used to provide electrical energy for the shock absorber. Since the output voltage of the power battery is very high, it is necessary to convert the high-voltage electrical energy of the power battery into low-voltage electrical energy through a bidirectional DC converter to power the shock absorber.

[0003] However, the bidirectional DC converter may fail, such as malfunctioning. In this case, if the vehicle's low-voltage storage battery is used to power the shock absorber, since the output voltage of this type of storage battery is small, to meet the power demand of the shock absorber, a relatively large supply current is required. But when the current is too large, if the wire harness is too thin, there are safety hazards; if the wire harness is too thick, it is not convenient to arrange in the limited space at the vehicle wheel. Therefore, how to safely and effectively supply power to the shock absorber in this case is a problem that needs to be solved. Summary of the Utility Model

[0004] The embodiments of this application provide a vehicle suspension vibration energy recovery device and a vehicle, which can safely and effectively supply power to the shock absorber when the bidirectional DC converter fails.

[0005] In a first aspect, the embodiments of this application provide a vehicle suspension vibration energy recovery device, including:

[0006] A power battery, configured to provide electrical energy for the vehicle;

[0007] A first storage battery;

[0008] A hydraulic shock absorber group, which is respectively connected to the power battery and the first storage battery. The first storage battery is used to exchange electrical energy with the hydraulic shock absorber group, and the output voltage of the first storage battery is equal to the working voltage of the hydraulic shock absorber group.

[0009] In a possible implementation manner of the first aspect, when any shock absorber in the hydraulic shock absorber group is in the energy feeding state, the any shock absorber is configured to supply power to at least one of the shock absorbers in the energy consuming state, the first storage battery, and the power battery.

[0010] In a possible implementation of the first aspect, the device further includes a bidirectional DC converter, which is respectively connected to the hydraulic shock absorber group and the power battery;

[0011] The bidirectional DC converter is used to convert the voltage of the electric energy provided by the power battery into the working voltage of the hydraulic shock absorber group, and convert the energy generated by the shock absorber in the energy feedback state into electric energy with a voltage equal to the output voltage of the power battery.

[0012] In a possible implementation of the first aspect, the shock absorber in the hydraulic shock absorber group includes a compression component and an electronic control component connected to each other;

[0013] When the shock absorber is in the energy feedback state, the shock absorber drives the electronic control component to rotate through the movement of the piston inside the compression component, so as to generate electric energy;

[0014] When the shock absorber is in the energy consumption state, the shock absorber drives the piston inside the compression component to move through the electronic control component, so as to adjust the height of the piston.

[0015] In a possible implementation of the first aspect, the electronic control component includes a motor and a gear pump, and the motor and the gear pump are coaxially connected; when the shock absorber is in the energy feedback state, the piston inside the compression component moves, driving the gear pump to rotate, and the gear pump drives the motor to rotate;

[0016] When the shock absorber is in the energy consumption state, the motor rotates, driving the gear pump to rotate, and the gear pump drives the piston inside the compression component to move.

[0017] In a possible implementation of the first aspect, when the shock absorber is in the energy feedback state, the displacement of the piston inside the compression component is equal to the change in the height of the vehicle wheel.

[0018] In a possible implementation of the first aspect, the compression component includes an inner cylinder, a liquid storage cavity is formed inside the inner cylinder, the liquid storage cavity is separated into a first cavity and a second cavity by the piston, and the first cavity and the second cavity are respectively communicated with the oil cavity in the electronic control component.

[0019] In a possible implementation of the first aspect, the compression component further includes an outer cylinder, the outer cylinder is sleeved outside the inner cylinder, an oil flow cavity is formed between the inner cylinder and the outer cylinder, and the oil flow cavity is respectively communicated with the first cavity and the second cavity.

[0020] In a possible implementation of the first aspect, the hydraulic shock absorber group includes four shock absorbers, and one shock absorber is correspondingly arranged at each wheel of the vehicle.

[0021] In a second aspect, an embodiment of the present application provides a vehicle, including the vehicle suspension vibration energy recovery device described in any one of the above first aspects.

[0022] In a possible implementation manner of the second aspect, the vehicle further includes a second battery, and the output voltage of the second battery is less than the output voltage of the first battery.

[0023] The beneficial effects of the embodiments of the present application compared with the prior art are as follows:

[0024] By providing the first battery in the energy supply system of the electric vehicle, the embodiments of the present application can supply power to the shock absorber based on the first battery when the bidirectional DC converter fails, ensuring the working stability of the shock absorber; and since the output voltage of the first battery is equal to the working voltage of the hydraulic shock absorber group, when using the first battery to supply power to the shock absorber, it is not necessary to use a large supply current, improving the power supply safety and the convenience of wiring harness arrangement. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 is a schematic structural diagram of the vehicle suspension vibration energy recovery device provided by an embodiment of the present application;

[0027] Figure 2 is a schematic structural diagram of the vehicle suspension vibration energy recovery device provided by another embodiment of the present application;

[0028] Figure 3 is a schematic overall structural diagram of the shock absorber provided by an embodiment of the present application;

[0029] Figure 4 is a schematic partial cross-sectional structural diagram of the shock absorber provided by an embodiment of the present application.

[0030] Reference Signs

[0031] 11, power battery; 12, first battery; 13, hydraulic shock absorber group; 14, bidirectional DC converter; 31, electronic control component; 32, piston; 33, connecting rod; 34, inner cylinder; 35, outer cylinder; 36, first cavity; 37, second cavity; 38, air spring. Detailed Embodiments

[0032] In the following description, specific details such as specific system architectures, technologies, etc. are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0033] Some embodiments of the present utility model will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present utility model and are not used to limit the protection scope of the present utility model. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0034] It should be noted that in the description of the present utility model, terms indicating directions or positional relationships such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the relevant devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, ordinal numbers such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can also be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] An embodiment of the present application discloses a vehicle suspension vibration energy recovery device. As Figure 1As shown in the figure, the device includes a power battery 11, a first storage battery 12, and a hydraulic shock absorber group 13. The hydraulic shock absorber group 13 is respectively connected to the power battery 11 and the first storage battery 12. Among them, the output voltage of the first storage battery 12 is less than that of the power battery 11. The power battery 11 is used to provide electrical energy for a vehicle (such as an electric vehicle or a hybrid vehicle). For example, it can be a lithium iron phosphate battery, a lithium cobalt oxide battery, a ternary lithium battery, or a graphene battery, etc. Based on the energy provided by the power battery 11, power is generated to drive the vehicle motor and push the vehicle forward. The power battery 11 is the main part of the energy storage of an electric vehicle. They have a high energy density and discharge capacity, and can provide continuous and high-power output. The power battery 11 also has the function of energy storage. For example, it stores the energy recovered from the vehicle suspension system and / or braking system. The output voltage of the power battery 11 is relatively high. Exemplarily, it can be 600V, 700V, 800V, etc.

[0037] In this embodiment, the hydraulic shock absorber group 13 includes a plurality of shock absorbers. For example, a hydraulic shock absorber group 13 can have four shock absorbers, that is, one shock absorber is correspondingly arranged at each wheel of the vehicle. The first storage battery 12 is used to exchange electrical energy with the hydraulic shock absorber group 13. That is, the first storage battery 12 can supply power to at least some of the shock absorbers in the hydraulic shock absorber group 13, and the energy recovered by the hydraulic shock absorber group 13 can charge the first storage battery 12. The first storage battery 12 can be, for example, a super capacitor, a lead-acid battery, etc. The output voltage of the first storage battery 12 is equal to the working voltage of the shock absorbers in the hydraulic shock absorber group 13. In this way, during the process of electrical energy interaction between the first storage battery 12 and the shock absorbers, there is no need to use equipment such as a voltage converter for voltage conversion, avoiding energy loss and improving the energy supply efficiency of the whole vehicle. Exemplarily, the working voltage of the hydraulic shock absorber group 13 can be 46V, 48V, etc.

[0038] Optionally, the first storage battery 12 also has the function of energy storage and can store the energy recovered by the vehicle suspension system.

[0039] In this embodiment, the shock absorbers in the hydraulic shock absorber group 13 have an energy-consuming state and an energy-feeding state. The electrical energy generated by the shock absorbers in the energy-feeding state is provided to at least one of the shock absorbers in the energy-consuming state, the first storage battery 12, and the power battery 11.

[0040] The above-mentioned energy-feeding state is the energy recovery state, that is, the shock absorber converts the kinetic energy generated during the up and down movement of the wheel into electrical energy, and then this electrical energy can be provided to at least one of the shock absorbers in the energy-consuming state, the first storage battery 12, and the power battery 11. The energy-consuming state is the state of consuming electrical energy. In this state, the shock absorber consumes electrical energy to adjust the liquid level height inside the shock absorber, thereby realizing the adjustment of the vehicle height.

[0041] Among them, when the shock absorber in the energy feeding state supplies electric energy to any one of the above three, it can supply electric energy to the shock absorber in the energy consumption state, the first battery 12 and the power battery 11 according to the energy transmission priority of the shock absorber in the energy consumption state, the first battery 12 and the power battery 11. For example, the energy generated by the shock absorber in the energy feeding state is preferentially transmitted to the shock absorber in the energy consumption state. Since the voltages of the two are the same, voltage conversion is not required in this way, reducing power consumption and improving the energy consumption efficiency of the vehicle battery. Or, the energy generated by the shock absorber in the energy feeding state is preferentially transmitted to the first battery 12. After the first battery 12 is fully charged, it is then transmitted to the shock absorber in the energy consumption state and the power battery 11. Or the energy generated by the shock absorber in the energy feeding state is preferentially transmitted to the power battery 11. After the power battery 11 is fully charged, it is then transmitted to the shock absorber in the energy consumption state and the first battery 12.

[0042] In this embodiment, by setting the first battery 12 in the power supply system of the electric vehicle, it is realized that when the bidirectional DC converter 14 fails, the shock absorber can be powered based on the first battery 12, ensuring the working stability of the shock absorber; and, since the output voltage of the first battery 12 is equal to the working voltage of the hydraulic shock absorber group 13, when using the first battery 12 to supply power to the shock absorber, it is not necessary to use a large supply current, improving the power supply safety and the convenience of wiring harness layout; on the other hand, the energy recovered by the shock absorber during vibration can be stored in the first battery 12, improving the effective utilization rate of the vehicle energy.

[0043] In another embodiment of the present application, as Figure 2 shown, the vehicle suspension vibration energy recovery device further includes a bidirectional DC converter 14. The bidirectional DC converter 14 is respectively connected to the hydraulic shock absorber group 13 and the power battery 11. The bidirectional DC converter 14 is a DC-DC converter that can realize the bidirectional flow of DC electric energy. For example, specifically, in this embodiment, when the power battery 11 supplies power to the hydraulic shock absorber group 13, the bidirectional DC converter 14 is used to convert the voltage of the electric energy provided by the power battery 11 into the working voltage of the hydraulic shock absorber group 13. When the electric energy obtained by converting the kinetic energy generated during the up and down movement of the wheel by the shock absorber is transmitted to the power battery 11, the bidirectional DC converter 14 is used to convert the electric energy generated by the shock absorber into electric energy with a voltage equal to the output voltage of the power battery 11.

[0044] Of course, in actual application, two bidirectional DC converters 14 can also be used. One of the bidirectional DC converters is used to convert the electric energy provided by the power battery 11 into the working voltage of the hydraulic shock absorber group 13. The other bidirectional DC converter is used to convert the electric energy generated by the shock absorber into electric energy with a voltage equal to the output voltage of the power battery 11.

[0045] In one embodiment, the first storage battery is connected to each shock absorber in the hydraulic shock absorber group through a switch. When the switch is closed, the circuit between the first storage battery and the shock absorber is conducted, so as to supply power to the shock absorber. When the switch is open, the first storage battery cannot supply power to the shock absorber.

[0046] Optionally, when the bidirectional DC converter works normally, the power battery supplies power to the hydraulic shock absorber group. When the bidirectional DC converter fails, the switch between the first storage battery and each shock absorber can be conducted, and the first storage battery supplies power to the hydraulic shock absorber group.

[0047] In another embodiment of the present application, as Figure 3 shown, the shock absorbers in the hydraulic shock absorber group 13 include a compression assembly and an electronic control assembly 31 connected to each other. Referring to Figure 4 , the compression assembly includes a piston 32 and a connecting rod 33. The piston 32 is connected to the bottom of the connecting rod 33. The piston 32 includes a piston body and a valve body. When the oil fluid flows through the valve body, a damping force is generated, achieving the effect of shock absorption. The adjustment of the magnitude of the damping force can be realized by adjusting the opening size of the valve port of the valve body or the viscosity of the oil fluid.

[0048] When the shock absorber is in the energy feeding state, the shock absorber drives the electronic control assembly 31 to rotate through the movement of the piston 32 inside the compression assembly along its axial direction, so as to generate electric energy. When the shock absorber is in the energy consumption state, the shock absorber drives the piston 32 inside the compression assembly to move along its axial direction through the electronic control assembly 31, so as to adjust the height of the piston 32.

[0049] In this embodiment, the electronic control assembly 31 includes a motor and a gear pump. The motor and the gear pump are coaxially connected, that is, the output shaft of the motor is in transmission connection with the gear pump. The gear pump transports fuel through the meshing of gears. There are two meshing gears inside the gear pump, and these gears rotate in a closely fitting pump housing. As the gears rotate, the teeth of the gears gradually disengage, forming a local cavity, namely an oil cavity. The volume of the oil cavity gradually increases as the gears rotate. External fuel can be sucked into the oil cavity, and the fuel in the oil cavity can also be discharged from the discharge port.

[0050] Wherein, when the shock absorber is in the energy feeding state, the piston 32 inside the compression assembly moves, driving the gear pump to rotate, and the gear pump drives the motor to rotate. And, the displacement of the piston 32 inside the compression assembly is equal to the change amount of the height of the vehicle wheel. When the shock absorber is in the energy consumption state, the motor rotates, driving the gear pump to rotate, and the gear pump drives the piston 32 inside the compression assembly to move.

[0051] The compression component further includes an inner cylinder 34 and an outer cylinder 35. A liquid storage cavity is formed inside the inner cylinder 34. The liquid storage cavity is separated by a piston into a first cavity 36 and a second cavity 37, and the second cavity 37 is the cavity at the bottom of the inner cylinder 34. The first cavity 36 and the second cavity 37 are respectively communicated with the oil cavities in the gear pump. The outer cylinder 35 is sleeved outside the inner cylinder 34, and an oil flow cavity is formed between the inner cylinder 34 and the outer cylinder 35. The oil flow cavity is respectively communicated with the first cavity 36 and the second cavity 37. When the vehicle controls the electronic control component 31 to work and pumps the oil in the oil circuit of the hydraulic shock absorber into the first cavity 36, the shock absorber performs a compression action. When the oil in the oil circuit is pumped into the second cavity 37, the shock absorber performs a restoration action.

[0052] Specifically, the vehicle controls the electronic control component 31 to work, pumps the oil in the oil circuit of the shock absorber into the second cavity 37 or the first cavity 36, and applies a set pressure value to the oil while pumping the oil, so as to adjust the pressures in the first cavity 36 and the second cavity 37, so as to quickly adjust the height of the shock absorber. At the same time, the oil in the first cavity 36 and the second cavity 37 interacts through the piston to generate a set value of passive damping force, achieving the purpose of quickly and accurately adjusting the height of the shock absorber and the shock absorption effect, and further the attitude of the entire vehicle body can be quickly adjusted as needed.

[0053] It should be noted that the oil circuit of the shock absorber refers to all the structures in the shock absorber that are available for oil flow and are connected, including the first cavity 36, the second cavity 37, the oil cavities in the gear pump, the oil flow cavity, the oil passage, etc. described above.

[0054] In this embodiment, the shock absorber further includes an air spring 38. The air spring 38 is covered on the top side of the inner cylinder 34, adding a function of adjusting the softness and hardness of the suspension to the shock absorber, so that the shock absorber integrates the functions of both the shock absorber and the air spring 38.

[0055] It should be noted that the electronic control component 31 can be an electric oil pump including a gear pump and a motor, or a pneumatic oil pump, or a hydraulic piston pump, as long as it can realize the transportation and pressurization of oil through circuit control; the above-mentioned motor in this embodiment is a DC brushless motor, and an AC motor, a three-phase asynchronous motor, etc. can also be selected; the above adjustments do not deviate from the principle of the present application and are all within the protection scope of the present application.

[0056] The present application also discloses a vehicle, including a second battery and the vehicle suspension vibration energy recovery device disclosed in any one of the above embodiments. Among them, the output voltage of the second battery is less than the output voltage of the first battery. Exemplarily, the output voltage of the second battery is 12V, which is used to supply power to the low-voltage electrical system of the vehicle. For example, the low-voltage electrical system is the lighting, audio, ignition system, and sensors of the vehicle.

[0057] Optionally, the vehicle may further include: a road condition information acquisition module, and a domain controller. The power battery, the first battery, the hydraulic shock absorber group, the second battery, and the road condition information acquisition module are respectively connected to the domain controller.

[0058] It should be noted that the above embodiments are only used to illustrate the principle of the present application and are not intended to limit the protection scope of the present application. Without departing from the principle of the present application, those skilled in the art can adjust the above embodiments so that the present application can be applied to more specific application scenarios.

[0059] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. A vehicle suspension vibration energy recovery device, characterized in that, Comprising: A power battery for providing electrical energy to the vehicle; A first storage battery; A hydraulic shock absorber group respectively connected to the power battery and the first storage battery. The first storage battery is used for exchanging electrical energy with the hydraulic shock absorber group, and the output voltage of the first storage battery is equal to the operating voltage of the hydraulic shock absorber group.

2. The device according to claim 1, characterized in that, When any shock absorber in the hydraulic shock absorber group is in the energy feeding state, the any shock absorber is used for supplying power to at least one of the shock absorbers in the energy consuming state, the first storage battery and the power battery.

3. The device according to claim 1, characterized in that, The device further includes a bidirectional DC converter respectively connected to the hydraulic shock absorber group and the power battery; The bidirectional DC converter is used for converting the voltage of the electrical energy provided by the power battery into the operating voltage of the hydraulic shock absorber group, and converting the energy generated by the shock absorber in the energy feeding state into electrical energy with a voltage equal to the output voltage of the power battery.

4. The device according to claim 1, characterized in that, The shock absorber includes a compression component and an electronic control component connected to each other; When the shock absorber is in the energy feeding state, the shock absorber drives the electronic control component to rotate through the movement of the piston inside the compression component, generating electrical energy; When the shock absorber is in the energy consuming state, the shock absorber drives the piston inside the compression component to move through the electronic control component, realizing the adjustment of the height of the piston.

5. The device according to claim 4, characterized in that, The electronic control component includes a motor and a gear pump, and the motor and the gear pump are coaxially connected; when the shock absorber is in the energy feeding state, the piston inside the compression component moves, driving the gear pump to rotate, and the gear pump drives the motor to rotate; When the shock absorber is in the energy consuming state, the motor rotates, driving the gear pump to rotate, and the gear pump drives the piston inside the compression component to move.

6. The device according to claim 4, wherein When the shock absorber is in the energy feeding state, the displacement of the piston inside the compression component is equal to the change in the height of the vehicle wheel.

7. The device according to any one of claims 4 to 6, characterized in that The compression component includes an inner cylinder, a liquid storage cavity is formed inside the inner cylinder, the liquid storage cavity is separated into a first cavity and a second cavity by the piston, and the first cavity and the second cavity are respectively communicated with the oil cavities in the electronic control component.

8. The device according to claim 7, characterized in that, The compression component further includes an outer cylinder sleeved outside the inner cylinder, an oil fluid circulation cavity is formed between the inner cylinder and the outer cylinder, and the oil fluid circulation cavity is respectively communicated with the first cavity and the second cavity.

9. The device according to any one of claims 1-6, characterized in that, The hydraulic shock absorber group includes four shock absorbers, and one shock absorber is correspondingly arranged at each wheel of the vehicle.

10. A vehicle, characterized in that, The vehicle includes a vehicle suspension vibration energy recovery device according to any one of claims 1-9.

11. The vehicle according to claim 10, wherein, The vehicle further includes a second storage battery, and the output voltage of the second storage battery is less than the output voltage of the first storage battery.

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