Electric automobile wind power energy storage device, control circuit and electric automobile

Abstract

The invention relates to the technical field of electric vehicle energy recovery, and discloses an electric vehicle wind power energy storage device, a control circuit and an electric vehicle, the electric vehicle wind power energy storage device is connected with a power battery pack in parallel, and the electric vehicle wind power energy storage device comprises fan blades, a conversion assembly, an energy storage assembly and an external connector; the conversion assembly is provided with a cam shaft, an elastic piece and a piezoelectric structure, the elastic piece is arranged on the periphery of the cam shaft, the piezoelectric structure is arranged on the periphery of the elastic piece, and the elastic piece is arranged to be of a wavy structure capable of extruding the cam shaft and the piezoelectric structure and used for converting kinetic energy into electric energy. The storage assembly is connected with the conversion assembly and stores the current generated by the conversion assembly so as to replace the power battery pack to provide instantaneous current when the electric vehicle accelerates, and the influence of a battery protection mechanism of the BMS on driving experience is avoided while protection is provided for the power battery pack.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle energy recovery, and in particular to an electric vehicle wind energy storage device and a control circuit, and an electric vehicle. Background Art

[0002] The power battery pack is the energy source of the electric vehicle's power output. The acceleration and deceleration frequency of the vehicle will directly affect the maximum capacity and cycle life of the power battery pack, and thus affect the vehicle's range. The following introduces the general methods for solving the current reduction in range caused by frequent acceleration and deceleration of vehicles from the perspectives of drivers and car companies:

[0003] 1. As a driver, you should avoid frequent acceleration and deceleration of the vehicle and try to drive at a constant speed;

[0004] 2. As a car manufacturer, the BMS system can be used to monitor and manage the working status of the power battery pack to protect the power battery from overcurrent problems caused by frequent acceleration and deceleration of the vehicle.

[0005] These two methods actually still have some disadvantages:

[0006] For drivers, frequent acceleration and deceleration are inevitable when driving on complex urban roads. When driving on winding mountain roads, the frequency of acceleration and deceleration is even higher. At the same time, a larger current is required to support complex climbing conditions, which increases energy consumption and shortens the driving range. Even if there are a considerable number of charging piles to recharge the battery at any time, the charging cost will also increase.

[0007] For car manufacturers, protecting the battery from overcurrent problems caused by frequent acceleration and deceleration through the BMS system means limiting the power under certain conditions, so the acceleration and deceleration performance of the vehicle will decrease. For example, when the remaining power is below 20% SOC, the battery discharge power will be limited due to the battery protection mechanism of the BMS. If you step on the accelerator hard, the vehicle speed will only increase slowly, which will lead to a poor driving experience for the driver. Summary of the invention

[0008] The purpose of the present invention is to overcome the problems in the prior art that frequent acceleration and deceleration of electric vehicles damages batteries and affects the driving experience under the battery protection mechanism of BMS, and to provide an electric vehicle wind energy storage device and a control circuit. The electric vehicle wind energy storage device has a conversion component and an energy storage component connected to a fan. The conversion component converts the kinetic energy of the fan rotating against the wind into electrical energy, and the energy storage component stores the electrical energy after conditioning, and then provides instantaneous electrical energy to the inverter module of the electric vehicle through an external plug-in, so that the instantaneous current when the electric vehicle accelerates comes from the device rather than the battery pack, so that the acceleration experience of the electric vehicle is not limited by the battery protection mechanism of the BMS, and at the same time can reduce the damage to the battery pack to a certain extent.

[0009] In order to achieve the above-mentioned object, the present invention provides, on one hand, a wind energy storage device for an electric vehicle, which is connected in parallel with a power battery pack and is used to replace the power battery pack to provide instantaneous current when the electric vehicle accelerates, comprising:

[0010] Fan blades;

[0011] A conversion component, the conversion component is connected to the fan blades to convert kinetic energy into electrical energy, the conversion component comprises: a camshaft, a spring and a piezoelectric structure; the spring is arranged on the periphery of the camshaft, the piezoelectric structure is arranged on the periphery of the spring, and the spring is arranged as a wave-shaped structure capable of being squeezed between the camshaft and the piezoelectric structure;

[0012] An energy storage component, the energy storage component is connected to the conversion component to store the current generated by the conversion component, the energy storage component includes a PCBA component and a super capacitor, and the PCBA component is provided with an AC\DC converter; and

[0013] An external connector is used to connect the energy storage component and the external device.

[0014] Preferably, the camshaft comprises a cam and a roller passing through the center of the cam, the cam has a plurality of cam peaks arranged along the circumference, and the fan blade is mounted on one end of the roller.

[0015] Preferably, the spring piece is arranged in a wave shape, the spring piece has two edge wave peaks and a middle wave valley, and a plurality of stress relief grooves are arranged on the spring piece;

[0016] There are a plurality of spring sheets, which are evenly distributed around the cam as the axis, and the spring sheets correspond one to one with the cam peaks; there are a plurality of piezoelectric structures, which correspond one to one with the spring sheets;

[0017] Preferably, the piezoelectric structures are provided in six numbers;

[0018] The piezoelectric structure is provided with a positive output terminal and a negative output terminal.

[0019] Preferably, the supercapacitor is connected to the piezoelectric structure, and the supercapacitor is configured as a polygonal groove wall structure with an internal core connected thereto;

[0020] Preferably, the supercapacitor is provided with a plurality of positive inputs and a plurality of negative inputs, the plurality of positive inputs are connected to the plurality of positive output terminals in a one-to-one correspondence, and the plurality of negative inputs are connected to the plurality of negative output terminals in a one-to-one correspondence;

[0021] The supercapacitor is also provided with a plurality of output terminals for connecting to other devices.

[0022] Preferably, the PCBA assembly includes a PCB board, an internal connector and a control chip CU, the internal connector is connected to the external connector, the PCBA assembly is connected to the piezoelectric structure, and a DC\DC converter connected to the supercapacitor is also provided on the PCBA assembly;

[0023] The PCB board is also provided with a plurality of input terminals and output terminals for circuit conversion and connection with other devices.

[0024] Preferably, two rolling bearings are arranged on the roller shaft at intervals, and the two rolling bearings are arranged on both sides of the cam respectively;

[0025] The electric vehicle wind energy storage device further comprises a front end cover, a middle end bracket, a connecting bracket and a rear end cover, wherein the front end cover, the middle end bracket and the rear end cover wrap the two rolling bearings and the conversion assembly, the rear end cover wraps the connecting bracket and the energy storage assembly, and the rear end cover is mounted on the middle end bracket;

[0026] The front end cover and the connecting bracket are respectively provided with circular grooves in the center for limiting and fixing the two rolling bearings, one end of the spring is fixed on the front end cover, the super capacitor is fixed on the connecting bracket, and the PCBA assembly is fixed on the super capacitor;

[0027] The piezoelectric structure is fixed on the middle-end bracket, and a plurality of mounting grooves are provided on the inner wall of the middle-end bracket for limiting the piezoelectric structure. U-shaped columns are respectively installed on the opposite inner walls in the mounting grooves, and U-shaped grooves capable of embracing the U-shaped columns are provided on both sides of the piezoelectric structure;

[0028] Preferably, the front end cover and the connecting bracket are configured as regular hexagons, and the middle end bracket and the rear end cover have regular hexagonal cavities.

[0029] Preferably, a plurality of such devices can be arranged in parallel.

[0030] A second aspect of the present invention provides a wind energy storage control circuit for an electric vehicle, the control circuit comprising:

[0031] A main control module, a first end of which is connected to an accelerator of the electric vehicle;

[0032] an inverter module, wherein a first end of the inverter module is connected to a power battery pack, a second end of the inverter module is connected to a motor, and a third end of the inverter module is connected to a second end of the main control module; and

[0033] As described above, the wind energy storage device, one end of the conversion component of the wind energy storage device is connected to the first end of the energy storage component of the wind energy storage device, the other end of the conversion component is connected to the second end of the energy storage component, the third end of the main control module is connected to the node between one end of the conversion component and the first end of the energy storage component, the third end of the energy storage component is connected to the fourth end of the main control module, the external connector is the fourth end and the fifth end of the energy storage component, and is connected to the fourth end of the inverter module.

[0034] Preferably, the main control module includes:

[0035] A control chip CU, wherein a first end of the control chip CU is connected to the accelerator, and a coil of the control chip CU is disposed at two ends of the supercapacitor;

[0036] A first controllable switch, one end of the first controllable switch is connected to one end of the conversion component, the other end of the first controllable switch is connected to the first end of the energy storage component, and the control end of the first controllable switch is connected to the second end of the control chip CU;

[0037] a second controllable switch, wherein one end of the second controllable switch is connected to the supercapacitor, the other end of the second controllable switch is connected to the DC\DC converter, and the control end of the second controllable switch is connected to the third end of the control chip CU;

[0038] A mechanical switch, one end of which is connected to the air intake grille of the electric vehicle, and the other end of which is connected to the fourth end of the control chip CU;

[0039] A control chip MCU, one end of which is connected to the control chip CU;

[0040] A third controllable switch, one end of the third controllable switch is connected to the power battery pack, the other end of the third controllable switch is connected to the inverter module, and the control end of the third controllable switch is connected to the other end of the control chip MCU.

[0041] A third aspect of the present invention provides an electric vehicle, comprising the electric vehicle wind energy storage control circuit described above.

[0042] Through the above technical solution, the wind energy storage device of the electric vehicle is connected in parallel with the power battery pack. When the electric vehicle is driving, the fan blades rotate against the wind, thereby driving the camshaft to rotate. When the camshaft rotates, the peripheral wall periodically squeezes the spring sheet, and the spring sheet then periodically squeezes the piezoelectric structure. The internal piezoelectric matrix of the piezoelectric structure generates a periodic instantaneous voltage under the action of the positive piezoelectric effect. The instantaneous voltage is converted into stable direct current through an AC\DC converter to charge the supercapacitor. It is used to provide instantaneous current instead of the power battery pack when the electric vehicle accelerates, providing protection for the power battery pack while avoiding the driving experience being affected by the battery protection mechanism of the BMS. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of an explosion of a wind energy storage device for an electric vehicle provided by the present invention;

[0044] Figure 2 It is a structural schematic diagram of a wind energy storage device for an electric vehicle provided by the present invention;

[0045] Figure 3 It is a schematic diagram of a cam wheel of a wind energy storage device for an electric vehicle provided by the present invention;

[0046] Figure 4 yes Figure 3 D direction view;

[0047] Figure 5 It is a structural schematic diagram of a spring piece of a wind energy storage device for an electric vehicle provided by the present invention;

[0048] Figure 6 yes Figure 5 F direction view;

[0049] Figure 7 It is a schematic diagram of a spring piece of a wind energy storage device for an electric vehicle provided by the present invention on a front end cover;

[0050] Figure 8 It is a front view of a piezoelectric structure of a wind energy storage device for an electric vehicle provided by the present invention;

[0051] Fig. 9 yes Figure 8 E direction view;

[0052] Fig.10 It is a schematic diagram of the connection between a piezoelectric structure of a wind energy storage device for an electric vehicle provided by the present invention and a super capacitor;

[0053] Fig.11 It is a front view of a supercapacitor of a wind energy storage device for an electric vehicle provided by the present invention;

[0054] Fig.12It is a front view of a PCBA assembly of a wind energy storage device for an electric vehicle provided by the present invention;

[0055] Fig.13 It is a schematic diagram of a piezoelectric structure of a wind energy storage device for an electric vehicle provided by the present invention installed on a middle-end bracket;

[0056] Fig.14 It is a schematic diagram of a wind energy storage device for an electric vehicle provided by the present invention installed on a support frame;

[0057] Fig.15 This is a circuit diagram of a wind energy storage control circuit for an electric vehicle provided by the present invention;

[0058] Fig.16 It is a circuit diagram of a wind energy storage control circuit for an electric vehicle provided by the present invention;

[0059] Fig.17 It is a structural schematic diagram of an electric vehicle provided by the present invention and equipped with a wind energy storage device.

[0060] Description of Reference Numerals

[0061] 1000, wind energy storage device body; 1001, fan blade; 1002, front cover; 1003, rolling bearing; 1004, spring piece; 1004A, stress relief groove; 1004C, edge crest; 1004D, middle trough; 1005, middle bracket; 1005A, U-shaped column; 1005B, installation groove; 1006, connecting bracket; 1007, rear cover; 1010, camshaft; 1011, roller; 1012, cam; 1012B, cam crest; 1020, piezoelectric structure; 1021, piezoelectric matrix; 1022B, positive output terminal; 1023B, negative output terminal; 1024, U-shaped groove; 1030, supercapacitor; 1031, positive input; 1032, negative input ; 1033A, positive transfer terminal; 1033B, positive jumper terminal; 1033C, positive output; 1033D, positive external output terminal; 1034A, negative transfer terminal; 1034B, negative jumper terminal; 1034C, negative output; 1034D, negative external output terminal; 1040, PCBA assembly; 1041, PCB board; 1043A, positive transfer input terminal; 1043B, primary positive conversion terminal; 1043C, secondary positive conversion terminal; 1044A, negative transfer input terminal; 1044B, primary negative conversion terminal; 1044C, secondary negative conversion terminal; 1045, internal connector; 1050, external connector; 2001, air intake grille; 3001, support frame; 3002, fastener. DETAILED DESCRIPTION

[0062] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0063] like Figure 1 and Figure 2 As shown, the first aspect of the present invention provides a wind energy storage device for an electric vehicle, which is connected in parallel with a power battery pack and is used to replace the power battery pack to provide instantaneous current when the electric vehicle accelerates, and includes a fan blade 1001, a conversion component, an energy storage component and an external connector 1050. The wind energy storage device can be arranged at the rear end of the air intake grille 2001 of the electric vehicle. The air intake grille 2001 is usually closed, and a valve or switch can be arranged to open the air intake grille 2001 when the wind energy storage device needs to supplement wind energy. The conversion component is connected to the fan blade 1001 to convert kinetic energy into electrical energy. When the electric vehicle needs to supplement wind energy when driving at a constant speed, the air intake grille 2001 is opened to rotate the fan blade 1001. The conversion component includes: a camshaft 1010, a spring 1004 and a piezoelectric structure 1 020; the spring piece 1004 is arranged on the periphery of the camshaft 1010, and the piezoelectric structure 1020 is arranged on the periphery of the spring piece 1004. The material of the spring piece 1004 is generally spring steel, which is relatively light and thin. A slight force can cause the elastic deformation of the spring piece 1004, and it is easy to restore to its original state. The spring piece 1004 is arranged to be a wave-like structure that can be squeezed between the camshaft 1010 and the piezoelectric structure 1020. The rotation of the fan blade 1001 drives the camshaft 1010 to rotate, and the cam While the outer wall of the shaft 1010 is periodically squeezed with the spring 1004, the spring 1004 is periodically squeezed with the piezoelectric structure 1020, and the piezoelectric matrix inside the piezoelectric structure 1020 generates an instantaneous voltage under the action of the positive piezoelectric effect; the energy storage component is connected to the conversion component to store the current generated by the conversion component, and the energy storage component includes a PCBA component 1040 and a super capacitor 1030. The PCBA component is provided with an AC\DC converter, and the AC\DC converter converts the alternating current generated by the piezoelectric structure 1020 into direct current, and then charges the super capacitor 1030 for use; the external connector 1050 is used to connect the energy storage component and an external device. For example, the energy storage component can be connected to the accelerator of the electric vehicle. When the accelerator sends an acceleration signal, the power battery pack stops working, and the energy storage component provides the accelerator with an instantaneous current to achieve acceleration. Not only will the driving experience not be affected by the BMS system, but it can also avoid overcurrent caused by frequent acceleration and deceleration of the power battery pack, effectively protecting the power battery pack.

[0064] Combination Figure 3 and Figure 4As shown, in the present invention, the camshaft 1010 includes a cam 1012 and a roller 1011 passing through the center of the cam 1012 , the cam 1012 has a plurality of cam peaks 1012B arranged along the circumference, and the fan blade 1001 is installed at one end of the roller 1011 .

[0065] Combination Figure 5 , Figure 6 As shown, the spring piece 1004 is configured to be wavy, and the spring piece 1004 has two edge peaks 1004C and a middle trough 1004D, and is squeezed by the cam peak 1012B and the middle trough 1004D of the spring piece 1004, and the edge peak 1004C and the piezoelectric structure 1020. In order to eliminate the problem of fatigue fracture of the spring piece 1004 caused by local stress concentration generated during deformation of the spring piece 1004, a plurality of stress relief grooves 1004A are provided on the spring piece 1004, and the plurality of stress relief grooves 1004A are distributed on the edge of the spring piece 1004 and the middle trough 1004D.

[0066] like Figure 7 As shown, a plurality of spring pieces 1004 are provided, and the plurality of spring pieces 1004 are evenly distributed with the cam 1012 as the axis, and the plurality of spring pieces 1004 and the plurality of cam wave peaks 1012B can correspond one to one, and a plurality of piezoelectric structures 1020 are provided, and the plurality of piezoelectric structures 1020 and the plurality of spring pieces 1004 correspond one to one, so that when the camshaft 1010 rotates, the plurality of spring pieces 1004 and the plurality of cam wave peaks 1012B are squeezed simultaneously, and the plurality of spring pieces 1004 and the plurality of piezoelectric structures 1020 are squeezed simultaneously, thereby generating periodic alternating current.

[0067] The number of the spring pieces 1004, the cam peaks 1012B and the piezoelectric structures can be selected in various ways, such as three, four, five, six, seven, eight ... as long as they correspond to each other. Preferably, the piezoelectric structures 1020 are set to six.

[0068] like Figure 8 , Fig. 9 As shown, the main body of the piezoelectric structure 1020 is set in a square shape, and a piezoelectric matrix 1021 of a stacked structure is arranged inside. The more layers of the piezoelectric matrix 1021 are stacked, the greater the power generation generated by pressure. In order to meet certain power generation performance and flexibility, the piezoelectric matrix 1021 is usually based on piezoelectric ceramics and mixed with other polymers to form a piezoelectric composite material. The piezoelectric structure 1020 is provided with a positive output terminal 1022B and a negative output terminal 1023B, which are respectively arranged on both sides of the piezoelectric structure 1020 and protrude from the main body of the piezoelectric structure 1020.

[0069] Combination Fig.10 and Fig.11 As shown, in the present invention, the super capacitor 1030 is connected to the piezoelectric structure 1020. To facilitate the connection between the two, the super capacitor 1030 is configured as a polygonal groove wall structure with an internal core connected thereto;

[0070] Preferably, a plurality of positive inputs 1031 and a plurality of negative inputs 1032 are provided on the polygonal groove wall of the supercapacitor 1030, the plurality of positive inputs 1031 are connected one-to-one with the plurality of positive output terminals 1022B, and the plurality of negative inputs 1032 are connected one-to-one with the plurality of negative output terminals 1023B.

[0071] The supercapacitor 1030 is also provided with a plurality of output terminals for connecting other devices, for example: a positive output 1033C and a negative output 1034C are provided on the polygonal groove wall of the supercapacitor 1030, and a positive transfer terminal 1033A, a negative transfer terminal 1034A, a positive jumper terminal 1033B and a negative jumper terminal 1034B are provided on the internal core of the supercapacitor 1030, one end of the positive transfer terminal 1033A is connected to the positive input 1031, and one end of the negative transfer terminal 1034A is connected to the negative input 1032.

[0072] Combination Fig.12 As shown, the PCBA component 1040 includes a PCB board 1041, an internal connector 1045 and a control chip CU. The internal connector 1045 is connected to the low-voltage output end of the external connector 1050. The low-voltage input end of the external connector 1050 is used to connect the accelerator. The PCBA component is connected to the piezoelectric structure 1020. The PCBA component is also provided with a DC\DC converter connected to the supercapacitor 1030 for stabilizing the voltage provided by the supercapacitor 1030 to ensure that the inverter can smoothly control the acceleration of the motor. In the acceleration mode, the CAN signal of the accelerator is input through the low-voltage input end of the external connector 1050, and through the control chip CU, conversion circuit, relay, etc. on the PCBA component, the high voltage of the supercapacitor 1030 can be instantly transmitted to the inverter, thereby controlling the acceleration of the motor.

[0073] The PCB board 1041 is also provided with a plurality of input terminals and output terminals for circuit conversion and connection with other devices, for example: a positive transfer input terminal 1043A connected to the positive transfer terminal 1033A, and a negative transfer input terminal 1044A connected to the negative transfer terminal 1033A, which converts the alternating current received by the super capacitor 1030 from the piezoelectric structure 1020 into direct current when storing electric energy;

[0074] There is also a primary positive conversion terminal 1043B connected to the positive jumper terminal 1033B and a primary negative conversion terminal 1044B connected to the negative jumper terminal 1034B, which transmit the converted direct current to the super capacitor 1030 to charge the super capacitor 1030;

[0075] There is also a secondary positive conversion terminal 1043C connected to the positive output 1033C and a secondary negative conversion terminal 1044C connected to the negative output 1034C, which transmits the voltage in the super capacitor 1030 to the DC\DC converter for voltage stabilization during acceleration;

[0076] There is also a positive external output terminal 1033D connected to the positive input terminal of the inverter and a negative external output terminal 1034D connected to the negative input terminal of the inverter, which transmit the stabilized voltage to the inverter for controlling the acceleration of the motor; at the same time, the positive external output terminal 1033D is also connected to the positive output 1033C, and the negative external output terminal 1034D is also connected to the negative output 1034C. In the constant speed mode, it is monitored whether the voltage across the super capacitor 1030 is less than the minimum discharge voltage to determine whether energy storage is required. When the voltage across the super capacitor 1030 is less than the minimum discharge voltage, the control chip CU controls the air intake grille 2001 to open for wind energy storage.

[0077] Combination Figure 1 , Figure 2 Two rolling bearings 1003 are arranged on the roller 1011 at intervals, and the two rolling bearings 1003 are respectively arranged on both sides of the cam 1012.

[0078] The electric vehicle wind energy storage device also includes a front end cover 1002, a middle end bracket 1005, a connecting bracket 1006 and a rear end cover 1007. The front end cover 1002, the middle end bracket 1005 and the rear end cover 1007 wrap the two rolling bearings 1003 and the conversion assembly, the rear end cover 1007 wraps the connecting bracket 1006 and the energy storage assembly, and the rear end cover 1007 is installed on the middle end bracket 1005.

[0079] Circular grooves are respectively provided in the center of the front end cover 1002 and the connecting bracket 1006 for limiting and fixing the two rolling bearings 1003, one end of the spring 1004 is vertically fixed to the front end cover 1002, the super capacitor 1030 is fixed to the connecting bracket 1006, and the PCBA assembly 1040 is fixed to the super capacitor 1030.

[0080] like Fig.13The piezoelectric structure 1020 is fixed on the middle bracket 1005, and a plurality of mounting grooves 1005B are provided on the inner wall of the middle bracket 1005 for limiting the piezoelectric structure 1020. U-shaped columns 1005A are respectively installed on the opposite inner walls of the mounting grooves 1005B, and U-shaped grooves 1024 capable of embracing the U-shaped columns 1005A are provided on both sides of the piezoelectric structure 1020, and the U-shaped grooves 1024 are embracing the U-shaped columns 1005A to fix the piezoelectric structure 1020;

[0081] Preferably, the front end cover 1002 and the connecting bracket 1006 are arranged as regular hexagons, the spring piece 1004 is installed corresponding to the edge of the front end cover 1002, the middle end bracket 1005 and the rear end cover 1007 have regular hexagonal cavities, and the piezoelectric structure 1020 is installed correspondingly on the edge of the middle end bracket 1005.

[0082] Combination Fig.14 As shown, in the present invention, a plurality of wind energy storage devices for electric vehicles can be arranged in parallel and connected in parallel with each other, and a plurality of conversion components are installed on a support frame 3001 through fasteners 3002 to realize the device based on different voltage platform requirements and power requirements.

[0083] The second aspect of the present invention provides a wind energy storage control circuit for an electric vehicle, the control circuit comprising: a main control module, an inverter module and a wind energy storage device. The first end of the main control module is connected to the accelerator of the electric vehicle; the first end of the inverter module is connected to the power battery pack, the second end of the inverter module is connected to the motor, and the third end of the inverter module is connected to the second end of the main control module; one end of the conversion component of the wind energy storage device is connected to the first end of the energy storage component of the wind energy storage device, the other end of the conversion component is connected to the second end of the energy storage component, the third end of the main control module is connected to the node between one end of the conversion component and the first end of the energy storage component, the third end of the energy storage component is connected to the fourth end of the main control module, and the external connector 1050 is the fourth and fifth ends of the energy storage component, and is connected to the fourth end of the inverter module.

[0084] In the present invention, the external connector 1050 connects the wind energy storage device to the inverter of the electric vehicle, such as Fig.15As shown in the simplified diagram of the electric vehicle wind energy storage control circuit, when the electric vehicle is in constant speed mode, the power battery pack is connected to the inverter to control the rotation of the electric vehicle's motor. If it is sensed that the power in the energy storage component is insufficient, the power generation mode and the energy storage mode are started, and the conversion component of the wind energy storage component converts wind energy into electrical energy and stores it in the energy storage component; when the electric vehicle needs to accelerate, the connection between the power battery pack and the inverter is disconnected, the path between the external plug-in 1050 and the inverter is closed, and the energy storage component controls the rotation of the motor to accelerate the electric vehicle, which can effectively protect the power battery pack from frequent acceleration and deceleration, and at the same time, the acceleration of the electric vehicle is not restricted by the BMS system, so as to maintain a good driving experience for the driver.

[0085] In the present invention, combined with Fig.16 As shown, the main control module includes:

[0086] A control chip CU, wherein a first end of the control chip CU is connected to the accelerator, and a coil of the control chip CU is disposed at two ends of the super capacitor 1030 to monitor the voltage at two ends of the super capacitor 1030;

[0087] A first controllable switch S1, one end of the first controllable switch S1 is connected to one end of the conversion component, the other end of the first controllable switch S1 is connected to the first end of the energy storage component, and the control end of the first controllable switch S1 is connected to the second end of the control chip CU;

[0088] a second controllable switch S2, wherein one end of the second controllable switch S2 is connected to the supercapacitor 1030, the other end of the second controllable switch S2 is connected to the DC\DC converter, and the control end of the second controllable switch S2 is connected to the third end of the control chip CU;

[0089] A mechanical switch, one end of which is connected to the air intake grille 2001 of the electric vehicle, and the other end of which is connected to the fourth end of the control chip CU;

[0090] A control chip MCU, one end of which is connected to the control chip CU;

[0091] A third controllable switch S3, one end of the third controllable switch S3 is connected to the power battery pack, the other end of the third controllable switch S3 is connected to the inverter module, and the control end of the third controllable switch S3 is connected to the other end of the control chip MCU.

[0092] Combination Fig.16As shown, in the present invention, when the electric vehicle is traveling in a non-acceleration state, the third controllable switch S3 is in a closed state, the first controllable switch S1 and the second controllable switch S2 are disconnected, and the power battery pack discharges the inverter to control the motor to rotate. If the coil of the control chip CU detects that the voltage across the supercapacitor 1030 is less than the minimum discharge voltage, the control chip CU controls the mechanical switch to open the air intake grille 2001 to let in air, the first controllable switch S1 is closed, and the second controllable switch S2 is disconnected, and the conversion component converts wind power into electrical energy, and passes through the AC\DC converter to perform DC charging to the supercapacitor 1030. After the supercapacitor 1030 is charged, the mechanical switch is closed to reduce wind resistance; when the electric vehicle accelerates, the control chip CU and the control chip MCU receive a signal from the accelerator, the first controllable switch S1 is disconnected, the third controllable switch S3 is disconnected, and the second controllable switch S2 is closed, the supercapacitor 1030 discharges, the current is stabilized by the DC\DC converter, and then the inverter is used to control the motor to rotate.

[0093] A third aspect of the present invention provides an electric vehicle, comprising the electric vehicle wind energy storage control circuit as described above, such as Fig.17 As shown, the wind energy storage device body 1000 is installed on the rear side of the air intake grille 2001 at the front end of the electric vehicle.

[0094] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any appropriate manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. An electric vehicle wind energy storage device, connected in parallel with a power battery pack, used to replace the power battery pack to provide instantaneous current when the electric vehicle accelerates, characterized in that: The electric vehicle wind energy storage device comprises: Fan blade (1001); A conversion component, the conversion component is connected to the fan blade (1001) to convert kinetic energy into electrical energy, the conversion component comprising: a camshaft (1010), a spring sheet (1004) and a piezoelectric structure (1020); the spring sheet (1004) is arranged on the periphery of the camshaft (1010), the piezoelectric structure (1020) is arranged on the periphery of the spring sheet (1004), and the spring sheet (1004) is arranged as a wave-shaped structure capable of being squeezed between the camshaft (1010) and the piezoelectric structure (1020); an energy storage component, the energy storage component being connected to the conversion component for storing current generated by the conversion component, the energy storage component comprising a PCBA component (1040) and a super capacitor (1030), and an AC\DC converter being arranged on the PCBA component; and An external connector (1050), wherein the external connector (1050) is used to connect the energy storage component and an external device.

2. The electric vehicle wind energy storage device according to claim 1, characterized in that: The camshaft (1010) comprises a cam (1012) and a roller (1011) passing through the center of the cam (1012); the cam (1012) has a plurality of cam wave peaks (1012B) arranged along a circumference; and the fan blade (1001) is mounted on one end of the roller (1011).

3. The electric vehicle wind energy storage device according to claim 2, characterized in that: The spring piece (1004) is configured to be wavy, the spring piece (1004) has two edge wave peaks (1004C) and a middle wave valley (1004D), and a plurality of stress relief grooves (1004A) are provided on the spring piece (1004); A plurality of the spring sheets (1004) are provided, and the plurality of the spring sheets (1004) are evenly distributed with the cam (1012) as the axis, and the plurality of the spring sheets (1004) and the plurality of the cam wave peaks (1012B) can correspond one to one, and a plurality of the piezoelectric structures (1020) are provided, and the plurality of the piezoelectric structures (1020) and the plurality of the spring sheets (1004) correspond one to one; Preferably, the piezoelectric structures (1020) are provided in six numbers; The piezoelectric structure (1020) is provided with a positive output terminal (1022B) and a negative output terminal (1023B).

4. The electric vehicle wind energy storage device according to claim 3, characterized in that: The super capacitor (1030) is connected to the piezoelectric structure (1020), and the super capacitor (1030) is configured as a polygonal groove wall structure with an internal core connected thereto; Preferably, the supercapacitor (1030) is provided with a plurality of positive inputs (1031) and a plurality of negative inputs (1032), the plurality of positive inputs (1031) are connected to the plurality of positive output terminals (1022B) in a one-to-one correspondence, and the plurality of negative inputs (1032) are connected to the plurality of negative output terminals (1023B) in a one-to-one correspondence; The supercapacitor (1030) is also provided with a plurality of output terminals for connecting to other devices.

5. The electric vehicle wind energy storage device according to claim 4, characterized in that: The PCBA component (1040) comprises a PCB board (1041), an internal connector (1045) and a control chip CU, the internal connector (1045) is connected to the external connector (1050), the PCBA component is connected to the piezoelectric structure (1020), and a DC\DC converter connected to the super capacitor (1030) is also provided on the PCBA component; The PCB board (1041) is also provided with a plurality of input terminals and output terminals for circuit conversion and connection with other devices.

6. The electric vehicle wind energy storage device according to claim 5, characterized in that: Two rolling bearings (1003) are arranged at intervals on the roller (1011), and the two rolling bearings (1003) are respectively arranged on both sides of the cam (1012); The electric vehicle wind energy storage device further comprises a front end cover (1002), a middle end bracket (1005), a connection bracket (1006) and a rear end cover (1007); the front end cover (1002), the middle end bracket (1005) and the rear end cover (1007) wrap the two rolling bearings (1003) and the conversion assembly; the rear end cover (1007) wraps the connection bracket (1006) and the energy storage assembly; and the rear end cover (1007) is mounted on the middle end bracket (1005); The front end cover (1002) and the connecting bracket (1006) are respectively provided with circular grooves in the center for limiting and fixing the two rolling bearings (1003); one end of the spring sheet (1004) is fixed on the front end cover (1002); the super capacitor (1030) is fixed on the connecting bracket (1006); and the PCBA assembly (1040) is fixed on the super capacitor (1030); The piezoelectric structure (1020) is fixed on the middle-end bracket (1005); a plurality of mounting grooves (1005B) are provided on the inner wall of the middle-end bracket (1005) for limiting the position of the piezoelectric structure (1020); U-shaped columns (1005A) are respectively installed on the opposite inner walls of the mounting grooves (1005B); and U-shaped grooves (1024) capable of embracing the U-shaped columns (1005A) are provided on both sides of the piezoelectric structure (1020); Preferably, the front end cover (1002) and the connecting bracket (1006) are configured as regular hexagons, and the middle end bracket (1005) and the rear end cover (1007) have regular hexagonal cavities.

7. The electric vehicle wind energy storage device according to any one of claims 1 to 6, characterized in that: A plurality of the devices are arranged in parallel.

8. An electric vehicle wind energy storage control circuit, characterized in that: The control circuit comprises: a main control module, a first end of which is connected to an accelerator of the electric vehicle; an inverter module, wherein a first end of the inverter module is connected to a power battery pack, a second end of the inverter module is connected to a motor, and a third end of the inverter module is connected to a second end of the main control module; and According to any one of claims 1 to 7, one end of the conversion component of the wind energy storage device is connected to the first end of the energy storage component of the wind energy storage device, the other end of the conversion component is connected to the second end of the energy storage component, the third end of the main control module is connected to the node between one end of the conversion component and the first end of the energy storage component, the third end of the energy storage component is connected to the fourth end of the main control module, and the external connector (1050) is the fourth end and the fifth end of the energy storage component, and is connected to the fourth end of the inverter module.

9. The electric vehicle wind energy storage control circuit according to claim 8, characterized in that: The main control module comprises: A control chip CU, wherein a first end of the control chip CU is connected to the accelerator, and a coil of the control chip CU is arranged at two ends of the super capacitor (1030); A first controllable switch (S1), one end of the first controllable switch (S1) is connected to one end of the conversion component, the other end of the first controllable switch (S1) is connected to a first end of the energy storage component, and a control end of the first controllable switch (S1) is connected to a second end of the control chip CU; a second controllable switch (S2), wherein one end of the second controllable switch (S2) is connected to the supercapacitor (1030), the other end of the second controllable switch (S2) is connected to the DC\DC converter, and the control end of the second controllable switch (S2) is connected to a third end of the control chip CU; A mechanical switch, one end of the mechanical switch is connected to the air intake grille (2001) of the electric vehicle, and the other end of the mechanical switch is connected to the fourth end of the control chip CU; A control chip MCU, one end of which is connected to the control chip CU; A third controllable switch (S3), one end of the third controllable switch (S3) is connected to the power battery pack, the other end of the third controllable switch (S3) is connected to the inverter module, and the control end of the third controllable switch (S3) is connected to the other end of the control chip MCU.

10. An electric vehicle, characterized in that: The invention comprises the electric vehicle wind energy storage control circuit as described in any one of claims 8 to 9.

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