TW201605665A - The system of freewheeling kinetic energy recovery of a vehicle and control method thereof - Google Patents

Abstract

The main structure of "the system of freewheeling kinetic energy recovery of an electric vehicle and control method thereof" is a one way bearing connects both with the hub of an electric vehicle and a planetary gears. And the sun gear of the planetary gears connects with the rotor of a generator. When the vehicle move forward by freewheeling, the ring gear move the vehicle forward as it revolve the one way bearing, and at the same time, the sun gear turn the rotor of the generator revolve in a high speedy to generate electric power, due to the planet carriers are fastened with the vehicle by nut. The electric power that generate by the generator is charged into the Electric Double Layer Capacitor (EDLC) of the electric vehicle via the commutator. The powers that move the electric vehicle forward is controlled by which volts is higher between EDLC and the battery of the electric vehicle.

Description

Power generation system for effectively recovering vehicle inertial sliding action energy and control method thereof

The invention relates to a power generation system and a control method thereof for effectively recovering the inertial sliding action energy of a vehicle, and a one-way clutch, a star gear system and a power generation system are connected in the electric wheel hub, and the power feedback device is not required to be powered off. The mechanical structure mode is used when the electric vehicle is in the red light or the obstacle or the downhill road section releases the electric motor and the inertia slides forward. The electric wheel hub is moved by the star gear system and coasts forward, and the star gear system simultaneously drives the power generation system to generate electricity; Dual power supply mode, including super capacitor, main power battery and control module, the power generation system only charges the super capacitor, so that the voltage of the super capacitor is higher than the main power battery of the electric vehicle, and the higher voltage of the super capacitor is given priority to the power supply. The electric vehicle motor; when the voltage of the super capacitor is lower than the main power battery, the main power battery supplies power to the electric vehicle motor; when the electric vehicle destroys the power consumption of the electric door, the electric wheel hub does not interlock with the power generation system, and does not generate electricity or consume Main power battery power system and its control method; no complicated power feedback system and increased energy loss The mechanical energy that allows the electric vehicle to coast forward can be immediately and effectively recovered into electric energy. At the same time, it has the function of smoothing the main power battery current output, prolonging the battery life, effectively reducing the power consumption, and extending the mileage to achieve the environmental protection goal of energy saving and carbon reduction. .

Insufficient energy and environmental issues have made electric vehicles a transportation technology industry that countries are actively promoting and participating in, but their endurance is the bottleneck for the development of electric vehicles. Therefore, the industry is constantly striving to develop new energy or more energy-saving methods. Recycling energy, such as the Republic of China invention patent I313652: "electric vehicle regenerative energy recovery brake system and its control method"; super capacitor and lithium iron battery in parallel power supply, such as the Republic of China invention patent I415365: "The action of the supercapacitor balance circuit With power system"; and linkage power generation structure, such as the Republic of China invention patent I446692: "the structure of the hub motor linkage power generation"; US invention patent US8723379 B2 are one of the methods to save energy use and improve endurance.

I313652 invention patent, "for a regenerative energy recovery brake system, the electric vehicle can have the most efficient energy use technology and the regenerative energy recovery brake system constructed according to this technology, including: regenerative energy recovery control module and core control The core controller can control power electronic components in the regenerative energy recovery control module, power electronic components and motors in the energy storage and supply module terminal voltage conversion device according to the brake command signal, the throttle command signal, and the motor speed signal. The windings connect the power electronic components within the structure change device to achieve the highest efficiency of use of the electric vehicle. This patent uses the brakes to recharge and use the super capacitors for fast charging and discharging. Although the double stator winding structure is used to increase the back electromotive voltage of the motor, the following problems still exist: First, the time to return to the parking is very short. Generally, before the brakes, the electric door is released, the vehicle starts to coast, and then enters the braking stage, and then stops. If only the braking time is used, unless it is long or steep, it will only be two or three seconds. The electric energy that can be charged into the super capacitor is negligible. ; Second, the brakes to the parking phase, unless the emergency brakes, the speed is usually less than 20 kilometers per hour, the motor speed is very low, the back electromotive force is limited; the generator speed and power relationship, low speed power generation efficiency is low, if the conventional locomotive tires The diameter is 16吋. When the maximum speed is 60km, the speed of the rim is 784RPM. The relationship between the output current and the speed is 14V. When the speed is 1000RPM, the current is 1.05A, and the current is 3000RPM. It is 8.1A, so even if the vehicle is driven at a top speed of 60 kilometers per hour, the rim speed is 784RPM, the power generation is negligible, not to mention the speed of less than 20 kilometers per hour is only 261RPM, which has limited help to extend the mileage of the vehicle; and the power recovery method is subject to too much Factors, including brake command signals, throttle command signals and speed signals, are more cumbersome and have further simplification.

As for the invention patent of I415365, "a super-capacitor and a lithium-iron battery are connected in series to form a balanced circuit module, which improves the voltage balance of the power supply system of the mobile vehicle, and provides parallel output of high power to the battery, and is delivered at the time of large output power. Ultra-high capacitors are responsible for discharging, while those requiring lower power and smooth current output are supplied by lithium-iron batteries. Based on the battery combination after the mains is fully charged, the electric energy is allocated. When discharging, the super capacitor and the lithium iron battery are discharged in parallel. Although it helps to balance the current, the large current discharge is still controlled by the lithium iron battery, and the electric vehicle starts. The demand for large currents in the moment is still insufficient. It has limited help to extend the life of lithium-iron batteries and increase the mileage. It has not fully utilized the characteristics of fast charging, discharging and high-current discharge of supercapacitors, which needs further breakthrough; even if it is used in I313652 invented the patented vehicle recovery system, and the parking time is very short because of the brakes. In just a few seconds, the energy in the series and parallel systems that can be charged between the super capacitor and the lithium iron battery is still very limited.

The Republic of China invention patent I446692 and the US invention patent US8723379 B2, the hub motor linkage power generation structure, although the function of increasing the speed to achieve effective power generation, when the vehicle is in the plane or downhill section, the speed can achieve the power generation effect, but in the vehicle consumption When the electric power advances, it also drives the power generation, which increases the load of the vehicle and affects the mileage.

Electric vehicles have become the transportation technology industry actively promoted and participated by all countries. Safety, charging facilities and endurance are the key factors. In terms of endurance, it is known to include different batteries, such as super capacitors and lithium-iron battery strings, and parallel power supply. Recycling energy and braking power generation structures are one of the ways to save energy and improve endurance. However, the recovery of the vehicle is hindered by the fact that the parking time is very short and the speed of the wheel is insufficient. The recovery of electric energy is limited. The super capacitor and the lithium iron battery are connected in parallel, which is used to balance the current supply and increase the mileage when the utility is fully charged. The charging and discharging effects are still subject to parallel lithium-iron batteries, failing to make full use of the characteristics of supercapacitors for rapid charging, discharging and large current discharge, which needs further innovation; as for the linkage power generation structure, the power generation is driven at the same time as the vehicle consumes power. Increasing the load on the vehicle and affecting the mileage are in the ointment. In view of the above problems, the present invention strengthens the invention patent I446692 linkage power generation system by means of multiple studies, and uses mechanical clutching mode to not connect the power generation system when the vehicle consumes power. When the electric vehicle releases the electric door, it automatically interlocks. Power generation system power generation; this also compensates for the lack of recharge of the invention patent I313652. Usually, the time from the release of the electric door and the brake to the parking is longer than the time from the brake to the parking. Inter-connected power generation can increase power generation time; and the invention patents I313652 and I415365 use supercapacitor with traditional battery operation mode to make an innovation. The power generation system only charges the super capacitor, and fully utilizes the super capacitor to quickly charge, discharge and large. The characteristics of current discharge, and adopt dual power supply mode, and supply electric power to the electric wheel hub motor in parallel with voltage-priority mode but independently through the step-down circuit; when the electric vehicle starts and accelerates forward, it will consume a large current, and the super capacitor is preferentially supplied with electric power. The electric power of the wheel hub motor is transferred to the electric power of the electric wheel hub motor by the main power battery on the smooth road section, so that the matched main power battery discharges with a relatively smooth current, prolongs the life of the battery, prolongs the driving mileage, and achieves the environmental protection purpose of energy saving and carbon reduction.

The invention relates to a power generation system and a control method thereof for effectively recovering the inertial sliding action energy of a vehicle, comprising two parts. The first part: a one-way clutch and a star-shaped gear train structure, including a one-way linkage with an electric vehicle rotor hub Clutch (or one-way bearing), the star gear system includes a ring gear, a plurality of planetary gears, a sun gear and planetary gear left and right brackets; the second part: a power generation, charging and dual power supply system, including one The motor, a plurality of series connected super capacitors electrically connected to the generator, a main power battery and a control module. With the electric wheel hub, the one-way clutch, the star gear system and the generator are connected, and the electric power feedback device is not required to be powered off. The mechanical structure is used to release the electric motor from the electric vehicle in the event of a red light or an obstacle or a downhill road. When the one-way clutch is in the joint state, the electric wheel hub is coasted by the star gear system and coasts forward; the star gear system simultaneously drives the generator to generate electricity, and the power generation can be charged into the electric vehicle with high charge. In the supercapacitor of discharge efficiency, no complicated electric energy feedback system and increased energy loss are required, so that the mechanical energy of the electric vehicle coasting forward can be effectively recovered into electric energy immediately, so that the voltage of the super capacitor is higher than The main power battery of electric vehicles is lithium, lithium ternary, lithium iron, nickel metal hydride or lead acid battery; and the dual power supply mode including IGBT module, in the cross conduction mode, regulate super capacitor and main power battery power Parallel but independent voltage-first mode MOSFET step-down circuit supplies electric wheel hub motor power, with higher voltage of super capacitor preferentially powering the electric wheel hub motor; when the super capacitor voltage is lower than the main power battery, the main switch The power battery supplies power to the electric wheel hub motor, and fully utilizes the high power density of the super capacitor, the long cycle life, and the excellent characteristics such as rapid charging, discharging and large current, and provides the electric wheel hub motor to start and accelerate. The instantaneous high current output demand effectively reduces the power consumption of the main power battery, and the smooth road section is powered by the lower voltage main power battery; when the electric vehicle destroys the power consumption of the electric door, the electric wheel hub is separated by the one-way clutch. In the case, the generator connected to the star-shaped gear train and the star-shaped gear train does not use the main power battery power; Smooth main power battery current output function, extend battery life, and extend mileage, achieving environmental protection for energy saving and carbon reduction.

A‧‧‧Electric wheel hub motor

A1‧‧·wheel

A11‧‧·The bearing shaft hole in the center of the side cover of the hub A1

B1‧‧‧left frame

B2‧‧‧Right frame

1‧‧‧One-way clutch and star gear system structure

11‧‧‧One-way clutch

111‧‧‧ screw holes

112‧‧‧Card Roller

113‧‧‧ Spring

12‧‧‧Star Gear System

121‧‧‧ring gear

122‧‧‧ planetary gear

123‧‧‧Sun Wheel

1231‧‧‧Sunlight shaft

124‧‧‧ planetary gear left bracket

125‧‧‧ planetary gear right bracket

1251‧‧‧ planetary gear right bracket central perforation

2‧‧‧Power generation, charging and dual power supply systems

21‧‧‧ Generator

211‧‧‧Generator coil stator

2111‧‧‧Mechanical coil stator central perforation

212‧‧‧One-way clutch

213‧‧‧Generator permanent magnet rotor

22‧‧‧Supercapacitors

23‧‧‧Main power battery

24‧‧‧Control Module

3‧‧‧Activity

A1‧‧‧The planetary gear rotates when the electric vehicle coasts forward

A2‧‧‧The reverse rotation of the sun gear center shaft and the planetary gear when the electric vehicle coasts forward

A3‧‧‧ When the electric vehicle coasts forward, the ring gear rotates in the same direction as the planetary gear

B1‧‧‧One-way clutch is interlocked with the ring gear when the electric vehicle is coasting forward

B2‧‧‧When the electric vehicle is coasting forward, the hub is interlocked by the one-way clutch

C1‧‧‧The permanent magnet rotor is interlocked with the central axis of the sun gear when the electric vehicle is coasting forward

D1‧‧‧Electric car destroys the power of the electric door when the electric car advances

D2‧‧‧Electric vehicle destroys the power consumption of the electric door when the one-way clutch is linked by the hub

Figure 1 is a schematic view of a specific embodiment of the present invention

Figure 2 is an exploded perspective view of a specific embodiment of the present invention

Fig. 3 is a cross-sectional view showing the interlocking of the hub, the one-way clutch and the star gear when the vehicle is slid forward.

4 is a perspective exploded view of the hub, the one-way clutch and the star gear when the vehicle is slid forward.

Fig. 5 is a cross-sectional view showing the interlocking of the hub, the one-way clutch and the ring gear when the vehicle consumes power.

Fig. 6 is a perspective exploded view showing the interlocking of the hub, the one-way clutch and the ring gear when the vehicle consumes power.

Figure 7 is a flow chart showing the operation of the power generation, charging and dual power supply systems of the present invention.

The technical features and actions of the present invention are described in detail below with reference to the accompanying drawings. FIG. 1 is a schematic diagram of a specific embodiment of the present invention; as shown in FIG. 1, the present invention includes two parts, the first part: a single The clutch and star gear train structure 1 includes a one-way clutch 11 (or a one-way bearing) that is coupled with the outer rotor hub A1 of the electric wheel hub motor A, a star gear train 12, and a star gear train 12 The outer edge of the ring gear 121 is unidirectionally coupled with the inner edge of the one-way clutch 11; the left and right brackets 124 to 125 of the planetary gear are fixed to the left and right frames B1 and B2 of the vehicle; the sun gear of the star gear system 12 The middle shaft 1231 passes through the bearing shaft hole on the central through hole 1251 of the planetary gear right bracket 125, and the permanent magnet rotor 213 of the generator 21 is rotated to generate electricity. The second part: a power generation, charging and dual power supply system 2: a generator 21, a plurality of series connected super capacitors 22 electrically connected to the generator 21, a main power battery 23 and a control module 24; The motor 21 includes a permanent magnet rotor 213 that is unidirectionally coupled with the sun shaft 1231; the control module 24 regulates the charging of the super capacitor 22 by the generator 21, and after the super capacitor 22 is fully charged, the generator 21 generates power. The bleed is no longer charged; the control module 24 simultaneously regulates the main power battery 23 and the super capacitor 22 in parallel with the voltage priority mode but independently supplies the electric wheel hub motor A power.

2 is an exploded perspective view of a specific embodiment of the present invention; as shown in FIG. 2, including: a first portion: a one-way clutch and a star-shaped gear train structure 1: including an electric wheel hub motor A outer rotor hub A1 The interlocking one-way clutch 11 (or one-way bearing), the one-star gear train 12, includes a ring gear 121 of the outermost ring, and a plurality of planetary gears meshing with the ring gear 121 in the same direction on the inner side of the ring gear 121 122, a device in the middle of a plurality of planetary gears 122, and a plurality of planetary gears 122 meshing with the sun gear 123 and the left and right brackets 124-125 of the planetary gears; the outer edge of the ring gear 121 of the star gear system 12 The inner edge of the one-way clutch 11 is coupled to the one-way linkage; the left and right brackets 124 to 125 of the planetary gear are fixed to the left and right frames B1 and B2 of the vehicle, and the left shaft bracket 124 and the bearing shaft hole of the center of the two sides of the hub A1 are fixed. A11 is connected and consolidated through the central perforation of the coil motor A coil stator, and is fixed to the left frame B1; the planetary gear right bracket 125 has a central perforation 1251 and is fixed to the right frame B2; the sun gear 123 has a center shaft 1231 passing through the planetary gear right bracket 125 The bearing shaft hole on the central through hole 1251 passes through the central through hole 2111 of the coil stator 211 of the generator 21, and is coupled to the permanent magnet rotor 213 of the generator 21 by a one-way bearing 212, and is unidirectionally coupled to generate electricity.

The second part: a power generation, charging and dual power supply system 2: a generator 21, a plurality of series connected super capacitors 22 electrically connected to the generator 21, a main power battery 23 and a control module 24; The motor 21 is composed of a coil stator 211 and a permanent magnet rotor 213. The coil stator 211 is fixed on the frame B2 and has a central through hole 2111. The central axis 1231 of the sun gear 123 passes through the central through hole 2111 of the coil stator 211. To bearing 212 and yong The magnetic rotor 213 is coupled with one-way linkage to generate electricity; the main power battery 23 can be various types of secondary batteries, including lithium, lithium ternary, lithium iron, nickel-hydrogen or lead-acid batteries, and the maximum voltage after the series connection is preset to 52.8. V is about; a plurality of series connected super capacitors 22, the highest voltage is preset to about 59.4V; the control module 24 regulates the generator 21 to charge the super capacitor 22, and when the super capacitor 22 reaches the maximum voltage of 59.4V, the generator 21 The power generation can be vented, and the super capacitor 22 is no longer charged; the control module 24 also includes an insulated gate bipolar transistor (IGBT) module to regulate the main power battery 23 in a cross conduction manner. The electric wheel hub motor A is electrically supplied in parallel with the super capacitor 22 in a voltage priority mode.

Wherein, when the electric vehicle is slid forward in a red light or an obstacle or a downhill road, the electric wheel hub A1 is engaged with the star gear system 12 by the one-way clutch 11 and is subjected to the star gear train 12 Simultaneously and inertially sliding forward, the star gear system 12 simultaneously drives the generator 21 to generate electricity, and is controlled by the control module 24, and the generated power can be charged into the super capacitor 22 with high charging and discharging efficiency on the electric vehicle, so that the super capacitor 22 The voltage is higher than the voltage of the main power battery 23 of the electric vehicle; and is controlled by the control module 24 in the dual power supply mode, and the higher voltage of the super capacitor 22 is preferentially supplied to the electric wheel hub motor A; When the voltage is lower than the voltage of the main power battery 23, the main power battery 23 is supplied with power to the electric wheel hub motor A; when the electric vehicle destroys the power consumption of the electric door, the electric wheel hub A1 is coupled to the star gear system by the one-way clutch 11 When the 12 is in the off state, the generator 21 that is not linked to the star gear system 12 and the star gear system 12 does not consume power and does not consume the power of the main power battery 23; the action is as follows: (1) One-way clutch and star-shaped gear train structure 1, interlocking mode: Please refer to FIG. 2, an exploded perspective view of a specific embodiment of the present invention, a screw hole 111 on the one-way clutch 11 for electric wheel hub motor A The hub A1 is screwed and consolidated, and the inner edge of the one-way clutch 11 has a roller (or ball) 112 that is held by a spring 113, and has a function of a one-way latch. The inner edge connects the ring gear 121 of the star gear train 12. The outer edge is unidirectionally interlocked with the ring gear 121; the structure of the present invention is that the hub A1 is the outer wheel of the one-way clutch 11, and the star gear system 12 is the inner wheel of the one-way clutch 11, according to the principle of the one-way clutch 11 The interlocking mode is: when the hub A1 is the driving wheel rotating forward, the one-way clutch 11 and the star gear system 12 are in a sliding state, and the star gear system 12 is not interlocked, and the star gear system 12 becomes the driving wheel and the hub. When the A1 rotates in the same direction, the star gear system 12 and the one-way clutch 11 are in a fastening state, and the interlocking hub A1 is rotated forward; the driving wheel is driven by the electric vehicle releasing the pedal inertial sliding forward and destroying the power consumption of the electric door. Situation, and produce different results from power generation and no power generation Explain as follows: (1) ~1 electric vehicle encounters red light or obstacle or downhill section to loosen the valve and coast to advance: Please refer to Figure 3, the invention, when the vehicle is taxiing forward, the hub, one-way clutch and star gear The cross-sectional view of the linkage, and the fourth figure, the three-dimensional exploded view of the hub, the one-way clutch and the star-shaped gear train when the vehicle is slid forward; when the electric vehicle encounters a red light or an obstacle or a downhill section, the electric door is freely gliding forward. When the main power battery 23 interrupts the power supply to the electric wheel hub motor A, the friction between the wheel and the ground causes the vehicle speed to slow down, and the hub A1 becomes a passive wheel, which is driven by the vehicle to coast forward; when the vehicle is coasting forward, the planetary gear is left. When the right brackets 124 to 125 are fixed to the frames B1 and B2, the star gear system 12 becomes the driving wheel, and the planetary gear 122 rotates clockwise as the moving a1, and the ring gear is interlocked. 121 clockwise rotation as actuating a3, and sun gear 123 rotating counterclockwise with the shaft 1231 as actuating a2; when the ring gear 121 is rotated clockwise, the inner side of the ring gear 121 is connected to the inner edge of the one-way clutch 11 112, driven by the clockwise rotation of the ring gear 121, the roller 112 compression spring 113 (the dotted line hidden in the figure) is pushed to the narrower side space, and the click roller 112 is fastened to the outer edge of the ring gear 121. In the state, in the case of being engaged with the one-way clutch 11, the one-way clutch 11 is interlocked to rotate clockwise as the action b1, and the hub A1 that is engaged with the one-way clutch 11 is pushed to rotate clockwise as the motion b2, and the vehicle is inertia. Continue to slide forward; when the planetary gear 122 simultaneously rotates the sun gear 123 and the shaft 1231 rotates counterclockwise as the motion a2, the sun shaft 123 of the sun gear 123 passes through the bearing shaft hole on the central perforation 1251 of the planetary gear right bracket 125, and then passes through the generator. 21 The coil stator 211 is centrally perforated 2111, and the one-way clutch 212 is unidirectionally coupled to the generator 21. The permanent magnet rotor 213 is rotated to operate as c1 to generate electricity.

(1) ~2 electric vehicle destroys the power consumption of the electric door: Please refer to Fig. 5, the cross-sectional view of the hub, the one-way clutch and the ring gear when the vehicle consumes power, and the sixth figure, the invention consumes power in the vehicle When moving forward, the hub, the one-way clutch and the ring gear are interlocked with the three-dimensional exploded view; when the electric vehicle destroys the electric door, the power consumption advances, and the hub A1 is rotated clockwise to advance as the driving d1, the hub A1 is the driving wheel, and the one-way clutch 11 is rotated clockwise. If act d2, the latching roller 112 of the inner edge of the one-way clutch 11 is pushed by the spring 113 to the looser side space, and there is a proper gap between the roller 112 and the outer edge of the ring gear 121, and no friction is generated, so that the one-way clutch 11 is in a state of being separated from the outer edge of the ring gear 121, and does not interlock with the ring gear 121; the ring gear 121 and its associated planetary gear 122 and the sun gear 123 and the generator coupled with the shaft 1231 of the sun gear 123 21 permanent magnet rotors 213 are also stationary The state does not work, does not generate electricity and does not consume the main power battery 23 power.

In the star-shaped gear train structure, the ring gear 121 and the sun gear 123 can be designed according to the number of teeth to form different speed ratios. In this embodiment, the rotational speed of the sun gear 123 is set to be 5 times the rotational speed of the ring gear 121, and the conventional 16-wheel wheel is used. For example, when the vehicle speed is 60 kilometers per hour, the rim speed is about 784RPM, and when the ring gear 121 is linked, the rotation speed is also 784RPM. When the sun gear 123 rotates by 5 times, the rotation speed increases to 3918RPM; The motor power generation is positively correlated with its rotational speed. In actual operation, it has a certain output of 14V. When the speed is 1000RPM, it generates 1.05A, which is equivalent to 14.7W. When the speed is 3000RPM, it produces 8.1A, which is equivalent to 113.4W. Through the speed increasing structure of the star gear system 12 of the present invention, the generator 21 can be effectively generated, even when the vehicle is decelerated to 20 kilometers per hour, according to the structure of the present invention, the generator 21 can reach a speed of 1306 RPM, and still effectively generate electricity. .

Although about 4% mechanical damage is generated via the star gear train 12, and the 5x speed increase mechanism also produces about 20% mechanical damage, the generator system is tied to the vehicle to release the electric door, and does not consume the main power battery 23 Next, the inertial sliding operation works, so even if the speed increasing structure of the star gear system 12 of the present invention causes about 24% mechanical damage, more than 70% of the kinetic energy can be converted into electric energy, increasing the mileage of the vehicle.

(2) Power generation, charging and dual power supply system 2: Please refer to Figure 7 for the operation flow diagram of the power generation, charging and dual power supply system of the present invention; after the electric vehicle power is turned on, the control module 24 detects the super capacitor 22 and The main power battery 23 voltage; when the electric vehicle consumes power, the control module 24 is double-electricized including the IGBT module The source power supply mode controls the output of the super capacitor 22 and the main power battery 23 in a cross conduction manner, and supplies the electric wheel hub motor A with parallel power but independent MOSFET step-down circuit in a voltage priority mode to a higher voltage of the super capacitor 22 The electric power is supplied to the electric wheel hub motor A preferentially; when the voltage of the super capacitor 22 is lower than the main power battery 23, the main power battery 23 is supplied with power to the electric wheel hub motor A; when the electric vehicle releases the electric motor and coasts forward, the star shape The gear train 12 is connected to the generator 21 to generate electricity, and the generated power can be charged into the super capacitor 22 electrically connected thereto. When the voltage of the super capacitor 22 reaches a predetermined maximum voltage, for example, 59.4 V, the generator is controlled by the control module 24 21 will discharge the generated power and stop charging the super capacitor 22.

Supercapacitor 22, generally known as Electric Double Layer Capacitor (EDLC), may also be called Ultracapacitor or Super-Capacitor; although its energy density per unit volume is low, it has high power density and long cycle life. It can quickly charge, discharge and discharge large current. Because the super capacitor 22 has fast charging characteristics, the voltage of the super capacitor 22 will be higher than the voltage of the main power battery 23 at any time when the generator 21 is charged at any time. The supercapacitor 22 preferentially supplies power to the electric wheel hub motor A under the control of the control module 24 of the electric wheel hub motor A via the voltage priority mode in parallel but independently via the step-down circuit; and usually the motor starting torque is approximately the rated torque 1.4 times or more, under the high current and rapid discharge characteristics of the supercapacitor 22, when the electric vehicle starts and accelerates to travel with a large current, the super capacitor 22 provides a certain degree of short time and large current to preferentially supply power to the electric wheel hub motor A, Effectively reduce the power consumption of the main power battery 23 and reduce its instantaneous high current output; but the super capacitor 22 is quickly discharged Characteristics, after a short period of power supply to the electric wheel hub motor A, the supercapacitor 22 voltage will soon be lower than the main power battery 23 voltage, and the control mode of the electric wheel hub motor A electric energy is supplied in parallel with the voltage priority mode but independently through the step-down circuit. In the group 24, the control is transferred from the main power battery 23 to the electric wheel hub motor A, that is, in the smooth section of the power stable output, and the main power battery 23 is supplied to the electric wheel hub motor A.

The charging and discharging mechanism of the supercapacitor 22 is a physical phenomenon, and there is no chemical reaction, so the cycle life is up to 10,000 times or more. The system of the present invention and the control method thereof start the power generation system when the electric motor vehicle is driven to release the inertia of the electric motor. The super capacitor 22 is charged, and when the electric capacitor is started again, the short-time discharge gives the motor a large current output demand, effectively reducing the power consumption of the main power battery 23, frequent charging and discharging, and fully utilizing the super capacitor 22 A superior feature that achieves the best use.

Take a wheel motor motor car with a rated voltage of 48V and a power of 1500W. For example, a lithium iron battery with a rated voltage of 48V and 30AH is used. Under standard load, it takes about 6 seconds to start at a rated maximum speed of 60 kilometers per hour. If equipped with 22 350 Farads, 2.7V with a balanced capacitor in series with a super capacitor, the maximum voltage is 59.4V. When the generator is full of super capacitors and the supercapacitor powers the hub motor, the power supply is about 5.8 seconds. The formula is as follows: t = C * △ V / I = 350 / 22 * (59.4-48) / (1500W / 48V) = 5.8 (seconds); C = 350 (Fara) / 22 (pieces), △ V for lithium iron The difference between the battery calibration voltage 48V and the super capacitor 22 maximum voltage 59.4V, I is the current of the hub motor with a nominal voltage of 48V and a power of 1500W. If the maximum output voltage of the connected generator is 60V and the current is 30A, the super capacitor can be charged to a maximum voltage of 59.4V in about 6.1 seconds; that is, in the case of efficient charging of the generator, via appropriate configuration of the super capacitor, Most of the electrical energy required to start and accelerate an electric vehicle is supplied by a super capacitor.

Unstable and instantaneous large current discharge is the main factor that seriously affects the life of the main power battery 23; under the framework of the present invention, the super capacitor 22 provides the demand for the instantaneous high current output of the motor power during the start and acceleration of the electric vehicle, while in the electric After the car is started and accelerated, when the smooth current output is maintained in the smooth section, the load usually does not exceed 70% of the motor output capability. At this time, the main power battery 23 of the lower voltage is supplied with power, and the voltage drop does not exceed the rated voltage of the motor 20 Above %, the motor can operate safely and meet the demand of the load, which can effectively reduce the power consumption; in addition, the super capacitor 22 provides the instantaneous large current output demand, which effectively reduces the power consumption of the main power battery 23 and reduces its instantaneous high current output. The function not only balances the current stability of the main power battery 23, but also prolongs the life of the main power battery 23. At the same time, it prolongs the battery life of the electric vehicle after each charging, prolongs the driving mileage, and achieves the environmental protection purpose of energy saving and carbon reduction.

The embodiments of the present invention are disclosed to illustrate the main technical features of the present invention, but are not intended to limit the technical scope of the present invention, and any changes and replacements equivalent to the present embodiment should be It is intended to be included within the scope of the present invention. In summary, it can be seen that the overall composition of the present invention is already the first application, and can achieve the intended purpose of efficacy, so it has novelty and progress. For this purpose, apply for a patent for invention, please review and grant it according to law. patent.

A‧‧‧Electric wheel hub motor

A1‧‧·wheel

B1‧‧‧left frame

B2‧‧‧Right frame

1‧‧‧One-way clutch and star gear system structure

11‧‧‧One-way clutch

12‧‧‧Star Gear System

121‧‧‧ring gear

1231‧‧‧Sunlight shaft

124‧‧‧ planetary gear left bracket

125‧‧‧ planetary gear right bracket

1251‧‧‧ planetary gear right bracket central perforation

2‧‧‧Power generation, charging and dual power supply systems

21‧‧‧ Generator

213‧‧‧Generator permanent magnet rotor

22‧‧‧Supercapacitors

23‧‧‧Main power battery

24‧‧‧Control Module

Claims (5)

The invention relates to a power generation system for effectively recovering the inertial sliding action energy of a vehicle and a control method thereof, comprising: a one-way clutch and a star-shaped gear train structure: a one-way clutch including a coupling with an outer rotor hub of an electric wheel hub motor, The outer edge of the star gear ring gear is unidirectionally coupled with the inner edge of the one-way clutch. The left and right brackets of the planetary gear of the star gear train are fixed to the left and right frames of the vehicle, and the electric vehicle is released from the motor. When advancing, the planetary gear rotates, and the interlocking gear then interlocks the one-way clutch and pushes the hub to rotate forward; the planetary gear simultaneously links the sun gear and its central axis, and unidirectionally rotates the permanent magnet rotor of the generator to generate electricity; When the one-way clutch does not interlock with the star-shaped gear train and the star-shaped gear train, the generator does not generate power and does not consume the main power battery power. A power generation, charging and dual power supply system: comprising a generator, a plurality of series connected super capacitors electrically connected to the generator, a main power battery and a control module; and the generator will control the power generation by the control module Filled into the super capacitor, the super capacitor voltage is higher than the main power battery, and the main power battery and the super capacitor are regulated in parallel with the voltage priority mode, but the electric wheel hub motor power is supplied through the step-down circuit independently. As described in claim 1, the power generation system and the control method thereof for effectively recovering the inertial sliding action energy of the vehicle, the structure of the one-way clutch and the star-shaped gear train is a one-way clutch outer wheel, the star gear It is the inner wheel of the one-way clutch. According to the linkage principle of the one-way clutch, the interlocking mode is: when the hub is the driving wheel, The one-way clutch and the star-shaped gear system are in a sliding state, and the star-shaped gear train is not linked. When the star gear system becomes the driving wheel and the hub rotate in the same direction, the star gear system and the one-way clutch are in a fastening state. , the wheel hub rotates. As described in claim 1, the power generation system and the control method thereof for effectively recovering the inertial sliding action energy of the vehicle, the main power battery can be various types of secondary batteries, including lithium, lithium ternary, lithium iron, nickel hydrogen Or lead acid battery. For example, the power generation system and the control method thereof for effectively recovering the inertial sliding action energy of the vehicle according to the first application of the patent scope, the control module adopts the dual power supply mode including the IGBT module when the electric vehicle consumes power. The cross-conduction mode is used to regulate the output of the supercapacitor and the main power battery power, and the electric wheel hub motor power is supplied in parallel with the voltage priority mode but independently by the step-down circuit, and the electric motor is driven to the electric wheel hub motor with the higher voltage of the super capacitor. When the voltage of the super capacitor is lower than the main power battery, the main power battery is supplied to the electric wheel hub motor. For example, the power generation system and the control method thereof for effectively recovering the inertial sliding action energy of the vehicle according to the first application of the patent scope, the generator can charge the power generation into the super capacitor to reach the predetermined maximum voltage of the super capacitor, via the control module The regulation, the generator will discharge the power generation, stop charging the super capacitor.