CN112477611A - Wind-solar complementary power generation and storage device for electric automobile and power generation calculation method - Google Patents

Wind-solar complementary power generation and storage device for electric automobile and power generation calculation method Download PDF

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CN112477611A
CN112477611A CN202011346142.5A CN202011346142A CN112477611A CN 112477611 A CN112477611 A CN 112477611A CN 202011346142 A CN202011346142 A CN 202011346142A CN 112477611 A CN112477611 A CN 112477611A
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power generation
battery
wind
solar
automobile
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许铧文
路纪元
陈辉
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L8/00—Electric propulsion with power supply from forces of nature, e.g. sun or wind
    • B60L8/003—Converting light into electric energy, e.g. by using photo-voltaic systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L8/00—Electric propulsion with power supply from forces of nature, e.g. sun or wind
    • B60L8/006—Converting flow of air into electric energy, e.g. by using wind turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/007—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations the wind motor being combined with means for converting solar radiation into useful energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/10—Combinations of wind motors with apparatus storing energy
    • F03D9/11—Combinations of wind motors with apparatus storing energy storing electrical energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/30—Wind motors specially adapted for installation in particular locations
    • F03D9/32—Wind motors specially adapted for installation in particular locations on moving objects, e.g. vehicles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/728—Onshore wind turbines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention provides a wind-solar complementary power generation and storage device for an electric automobile and a power generation calculation method, wherein the wind-solar complementary power generation and storage device comprises a solar thin-film battery and an illumination sensor which are arranged on an automobile middle net, a wind power generation device and a wind power generation controller which are arranged on the top of the automobile, and a solar charging controller and a storage battery which are arranged in the automobile. The solar energy and wind power generation are integrated on the automobile, so that the cruising ability of the new energy electric automobile is improved, and the service life of the storage battery is prolonged.

Description

Wind-solar complementary power generation and storage device for electric automobile and power generation calculation method
Technical Field
The invention relates to the technical field of solar energy utilization, in particular to a wind-solar complementary power generation and storage device for an electric automobile and a power generation calculation method.
Background
In recent years, the economy of China is rapidly developed, the living standard of people is continuously improved, the requirements on traffic trip are higher and higher, and the rapid development of the automobile field is promoted. Due to the rapid development of the automotive field, two major problems of energy crisis and environmental pollution become extremely serious. According to related department statistics, the domestic automobile sales volume is increased sharply from 2011, and the total domestic automobile volume is estimated to reach 3500 thousands of automobiles by 2020, and the development trend inevitably makes the problems of environmental pollution and energy shortage more prominent.
In order to alleviate the problems, the government has great advocated the popularization and use of new energy electric vehicles, but the new energy electric vehicles are driven by a storage battery pack to run, so that the endurance is limited, and if equipment such as a central control system is used during running, the consumption of electric quantity is accelerated, and the endurance is further reduced. Solar energy is one of green novel energy sources, has the characteristics of large energy, wide coverage and the like, and has huge development potential. In China, the solar energy resource is extremely rich, and the estimated energy of solar radiation reaching the earth surface every day is equivalent to the energy generated by about two hundred million or more barrels of petroleum. The resources are rich and convenient, and the energy supply system is applied to the field of new energy automobiles, and can be used for supplying partial or integral energy, so that the cruising ability of the new energy automobiles can be obviously improved.
At present, many people assume that a battery is installed as an energy source on the roof of an automobile without utilizing the space of the mesh part of the automobile.
Disclosure of Invention
The invention aims to provide a wind-solar complementary power generation and storage device for an electric automobile and a power generation calculation method, so as to solve the problems in the background technology.
In order to solve the above technical problem, an embodiment of the present invention provides the following technical solutions: the utility model provides a wind-solar complementary electricity generation accumulate device for electric automobile, is including installing solar energy film battery, the illumination sensor on the net in the car, setting wind power generation set, the wind power generation controller at the car top to and solar charging controller, the battery of setting in the car, solar energy film battery passes through horizontal steering wheel, vertical steering wheel and installs on the car net, solar charging controller is connected with solar energy film battery, car central control, battery, horizontal steering wheel, vertical steering wheel, illumination sensor electricity, the wind power generation set at the car top is connected with wind power generation controller electricity, wind power generation controller is connected with the battery electricity, the battery is connected with car central control electricity and for its confession.
Preferably, the solar charging controller and the wind power generation controller comprise an MCU processor, and a charging management chip, a relay, a memory, an interface communication module and a charging and discharging interface which are electrically connected with the MCU processor.
Preferably, the interface communication module is a serial communication module, a CAN bus communication module or a USB communication module.
Preferably, the illumination sensors are distributed at four corners of the solar thin film cell.
Preferably, the charging management chip is connected with the solar thin film battery, the relay is connected with the storage battery, and the interface communication module is connected with the automobile central control unit.
Preferably, the solar thin film battery is arranged on a supporting plate, and the supporting plate is sequentially arranged on the automobile middle net through a vertical steering engine and a horizontal steering engine.
Preferably, wind power generation set includes the telescopic link through bolt swivelling joint at car top, the power generation module is connected at the telescopic link top, the flabellum is connected to the power generation module front end, balanced wing is connected to the power generation module rear end, run through the power generation module for pivot and pivot between flabellum and the balanced wing, the electric energy output of power generation module passes through the wire and connects the wind power generation controller.
A power generation calculation method of a wind-solar hybrid power generation and storage device for an electric automobile comprises the following steps:
s1, detecting the open-circuit voltage at two ends of the battery to obtain the initial capacity SOC of the battery0；
S2, estimating the SOC by combining an open-circuit voltage method and an ampere-hour integration method;
s3, estimating the power consumption Q by combining an open-circuit voltage method and an ampere-hour integration method;
and S4, the battery power generation amount can be reversely deduced according to the power consumption Q.
Preferably, the SOC is estimated by combining an open-circuit voltage method and an ampere-hour integration method, and specifically includes:
obtaining initial capacity SOC of battery by detecting open-circuit voltage at two ends of battery0Then, then
SOC0＝(U0-n)/(m-n) (1)
Wherein U is0An open circuit voltage for the battery; m and n are coefficients;
the SOC is estimated by combining an open-circuit voltage method and an ampere-hour integration method, and the method comprises the following steps:
Figure BDA0002799990820000031
wherein QNIs the rated capacity of the battery; i is charging and discharging current (the current is a negative value during charging and the current is a positive value during discharging); k is a constant related to temperature and charge-discharge efficiency factor;
K＝Kt×η (3)
wherein Kt is a temperature correction coefficient; eta is a charge-discharge efficiency factor, and eta is obtained by a Peukert equation.
Preferably, the temperature correction coefficient Kt is calculated by the following formula:
Kt＝1+0.008(Ta-T), wherein TaIs the standard temperature; t is a set temperature;
the calculation method of the eta comprises the following steps:
the Peukert equation can obtain the relation formula of available electric quantity and discharge current
K＝A×In-1 (4)
Wherein I is a discharge current; a is a cell constant relating to the active material, and A and n are the same as long as the initial conditions are the same, so
η＝(I/IN)n-1 (5)
Wherein INFor the rated current, a and n (n is a constant related to the cell structure, particularly the plate thickness, and has a value of 1.15 to 1.42) can be determined by measuring two sets of I.
The technical scheme of the invention has the following beneficial effects:
according to the invention, the middle net of the new energy electric automobile is skillfully utilized, and the thin film battery is innovatively arranged on the middle net, so that the cruising ability of the new energy electric automobile is further improved, multi-channel charging can be realized, and the service life of the storage battery is prolonged. And the angle of the thin film battery can be adjusted by detecting the sunlight intensity, so that the solar energy can be effectively utilized. In addition, a power generation calculation method for calculating the solar power storage device is provided, so that the endurance time of the thin film battery to the central control of the automobile and the energy saving of the thin film battery can be known.
Drawings
Fig. 1 is a schematic structural diagram of the whole system of the invention.
FIG. 2 is a diagram of an experimental model according to the present invention.
FIG. 3 is a schematic structural diagram of a solar thin film battery connected to a middle net through a steering engine.
Fig. 4 is a schematic block diagram of the whole system of the present invention.
FIG. 5 is a schematic view of the telescopic rod of the present invention, which is connected to the roof via bolts.
Fig. 6 is a flowchart of a solar power generation amount calculation method of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-4, a wind-solar hybrid power generation and storage device for an electric vehicle is characterized by comprising a solar thin film battery 1 and an illumination sensor 7 which are arranged on a vehicle central network, a wind power generation device 9 and a wind power generation controller 10 which are arranged on the top of the vehicle, a solar charging controller 2 and a storage battery 4 which are arranged in the vehicle, wherein the solar thin film battery 1 is arranged on the vehicle central network through a horizontal steering engine 5 and a vertical steering engine 6, the solar charging controller 2 is electrically connected with the solar thin film battery 1, the vehicle central controller 3, the storage battery 4, the horizontal steering engine 5, the vertical steering engine 6 and the illumination sensor 7, the wind power generation device 9 on the top of the vehicle is electrically connected with the wind power generation controller 10, the wind power generation controller 10 is electrically connected with the storage battery 4, and the storage battery 4 is electrically connected with the vehicle central controller 3.
The wind power generation device 9 comprises an expansion link 91 rotatably connected to the top of the vehicle through a bolt 96, the top of the expansion link 91 is connected with a power generation module 92, the front end of the power generation module 92 is connected with a fan blade 93, the rear end of the power generation module 92 is connected with a balance wing 94, a rotating shaft and a rotating shaft penetrate through the power generation module 92 between the fan blade 93 and the balance wing 94, and the electric energy output end of the power generation module 92 is connected with the wind power generation controller 10 through a wire 95. The telescopic rod 91 can adjust its vertical height when in use, and its structural principle is similar to a radio antenna. The power generation module 92 utilizes the electromagnetic cutting power generation principle, when the fan blade 93 is blown by wind to rotate, the rotating shaft between the fan blade 93 and the balance wing 94 rotates to drive the coil in the power generation module 92 to cut magnetic lines of force to move so as to generate power, current is transmitted to the wind power generation controller 10 through the wire 95 to be processed, and then is finally input into the storage battery 4, and the balance wing 94 plays a role in enabling the rotating shaft to rotate stably. As shown in fig. 5, the bottom of the telescopic rod 91 is connected to the roof through a bolt 96, when the whole power generation device needs to be stored, the bolt can be loosened, and the whole device can be folded and attached to the roof, so that the space is not occupied.
The solar charging controller 2 and the wind power generation controller 10 comprise an MCU processor, and a charging management chip, a relay, a memory, an interface communication module and a charging and discharging interface which are electrically connected with the MCU processor, wherein the charging management chip is connected with the solar thin film battery 1, the relay is connected with a storage battery, and the interface communication module is connected with the automobile central control unit 3. The charging management chip is used for managing various charging modes of the battery, such as a charging mode, a boosting mode and a sleeping mode. The relay is used for performing disconnection control on the charging loop when the battery is fully charged or the charging protection is performed. The interface communication module is a serial port communication module, a CAN bus communication module or a USB communication module and is used for communicating with automobile central control data, the function of interaction with a user is realized through a central control display screen and a key module, related charging parameters CAN be set through keys, and parameters such as the current battery charging state, the electric quantity, the illuminance and the like CAN also be known through the display screen. The charge-discharge interface is used for connecting the solar thin film battery, the storage battery and the load and providing a power input-output interface.
The illumination sensors 7 are distributed at four corners of the solar thin film cell 1 and used for detecting the solar illumination intensity of the solar thin film cell 1 and providing data reference for controlling the angle of the solar thin film cell 1 to obtain the optimal illumination receiving angle.
As shown in fig. 3, the solar thin film battery 1 is installed on a support plate 8, and the support plate 8 is installed on the automobile middle net sequentially through a vertical steering engine 6 and a horizontal steering engine 5. The vertical direction angle of the supporting plate 8 can be adjusted by controlling the action of the vertical steering engine 6, and the horizontal direction angle of the supporting plate 8 can be adjusted by controlling the action of the horizontal steering engine 5, so that the solar thin-film battery 1 can obtain the optimal illumination receiving angle.
When the controller is used, the storage battery is connected into positive and negative electrode ports of the storage battery of the controller in a positive and negative cascade mode, and the controller automatically detects the voltage of the storage battery; the positive and negative poles of the load are connected into the controller (because the direct current load is used, the direct current load can be directly connected with the load port of the controller); and connecting the positive electrode and the negative electrode of the thin-film storage battery into a controller.
The battery controller and wind power generation controller 10 can control the charging and discharging conditions of the battery, and control the battery and the power output of the battery to the load according to the power demand of the load, and the specific process is as follows:
voltage of the equalizing control point: after the direct charging is finished, the storage battery is generally kept still by the charge and discharge controller for a period of time, the voltage of the storage battery naturally falls, when the voltage falls to a ' recovery voltage ' value, individual molecules may fall behind ' (the terminal voltage is relatively low), in order to pull back the individual molecules, the terminal voltages of all the storage batteries are uniform and consistent, and the storage battery enters a uniform charging state, and the terminal voltage at the moment is the uniform charging voltage.
Floating charge control point voltage: generally, after the uniform charging is finished, the storage battery is kept stand for a period of time, so that the terminal voltage of the storage battery naturally falls, and when the terminal voltage falls to a maintenance voltage point, the storage battery enters a floating charging state, which is similar to trickle charging (namely, low-current charging), and the storage battery is charged a little bit when the voltage of the storage battery is low, so that the temperature of the storage battery is prevented from continuously rising, and the voltage when the floating charging state is finished is the floating charging voltage.
When the battery is in a charging state, the controller is used for charging management of the storage battery, and the storage battery is normally charged by the battery. When the charging voltage is higher than the cutoff voltage, the charging of the secondary battery is automatically turned off. After that, when the voltage of the storage battery is reduced to the maintaining voltage, the storage battery enters a floating charge state, when the voltage reaches the floating charge voltage, the storage battery enters a uniform charge state, and the storage battery enters a discharge state due to the consumption of the electric quantity of the storage battery by the load until the voltage is discharged and recovered.
When the battery is in an uncharged state, the generated electric quantity is stored in the storage battery, and the storage battery maintains normal work of the central control and other loads. When the voltage of the storage battery is lower than the discharging cut-off voltage, the controller automatically closes the output of the storage battery, the storage battery is prevented from being charged to the storage battery, the storage battery and the storage battery are protected from being damaged, and the storage battery does not maintain the load to work any more at the moment.
According to investigation, the area of the new energy automobile in the market is about 0.25m, and the electricity consumption of the automobile central control system is 45 Wh. The optimal power generation power of the thin film storage battery adopted by the invention is 100W per square meter, and the calculation shows that according to the operation of the thin film storage battery for 8 hours a day:
the generated energy of the storage battery is as follows: 0.25(m2) × 100(W/m2) × 8(h) ═ 200(Wh)
Maintaining the central control working time: 200(Wh)/45(W) ═ 4.44(h)
In practical application, the solar thin film battery 1 is installed on a new energy electric vehicle middle net, the solar charging controller 2 and the wind power generation controller 10 are respectively installed in a front cabin and a rear cabin of the vehicle, and a storage battery built in the vehicle is used for storing electric quantity. The thin-film storage battery with the appropriate specification is selected and purchased according to the area of the automobile middle net and is installed on the middle net, the photovoltaic effect is utilized to convert light energy into electric energy, the electric energy generated by the photovoltaic effect is stored in the storage battery through the controller, and when the storage battery reaches a full-charge state, the controller can automatically cut off the charging of the storage battery. At this time, the electric quantity stored in the storage battery can be supplied to normal operation of devices such as automobile central control devices. Fig. 1 is a schematic diagram of a principle structure of the whole system, fig. 2 is an experimental model diagram, and fig. 4 is a schematic block diagram of the whole system.
As shown in fig. 6, the invention also discloses a power generation calculation method of the wind-solar hybrid power generation and storage device for the electric vehicle, which comprises the following steps:
s1, detecting the open-circuit voltage at two ends of the battery to obtain the initial capacity SOC of the battery0；
S2, estimating the SOC by combining an open-circuit voltage method and an ampere-hour integration method;
s3, estimating the power consumption Q by combining an open-circuit voltage method and an ampere-hour integration method;
and S4, the battery power generation amount can be reversely deduced according to the power consumption Q.
The SOC is estimated by combining an open-circuit voltage method and an ampere-hour integration method, and the method specifically comprises the following steps:
when the performance of the lithium ion battery is completely stable, the state of charge and the open circuit voltage of the lithium ion battery have a linear relation in a certain range, and the linear relation is slightly influenced by temperature and battery aging factors, so that when the battery starts to charge and discharge, the initial capacity SOC of the battery is obtained by detecting the open circuit voltage at two ends of the battery under certain conditions0Then, then
SOC0＝(U0-n)/(m-n) (1)
Wherein U is0An open circuit voltage for the battery; m and n are coefficients;
the SOC is estimated by combining an open-circuit voltage method and an ampere-hour integration method, and the method comprises the following steps:
Figure BDA0002799990820000071
wherein QNIs the rated capacity of the battery; i is charging and discharging current (the current is a negative value during charging and the current is a positive value during discharging); k is a constant related to temperature and charge-discharge efficiency factor;
K＝Kt×η (3)
wherein Kt is a temperature correction coefficient; eta is a charge-discharge efficiency factor, and eta is obtained by a Peukert equation.
The calculation formula of the temperature correction coefficient Kt is as follows:
Kt＝1+0.008(Ta-T), wherein TaIs the standard temperature; t is a set temperature;
the calculation method of eta comprises the following steps:
the Peukert equation can obtain the relation formula of available electric quantity and discharge current
K＝A×In-1 (4)
Wherein I is a discharge current; a is a cell constant relating to the active material, and A and n are the same as long as the initial conditions are the same, so
η＝(I/IN)n-1 (5)
Wherein INFor the rated current, a and n (n is a constant related to the cell structure, particularly the plate thickness, and has a value of 1.15 to 1.42) can be determined by measuring two sets of I.
Wherein, combine open circuit voltage method and ampere-hour integral method to estimate power consumption Q, specifically do: q is (1-SOC) QNWherein Q isNIs the rated capacity of the battery. The capacity of the storage battery is measured by an open-circuit voltage method in the experiment, so that the generated energy of the solar energy is measured. The open circuit voltage method is to estimate the SOC value of a battery by measuring the terminal voltage of the battery when the battery is in an open circuit state and the chemical reaction inside the battery is in an equilibrium state. The SOC value of the battery is an important parameter reflecting the remaining capacity of the battery, and is defined as the ratio of the remaining capacity of the battery to the capacity of the battery: SOC is 1-Q/QNWherein Q is the consumed electric quantity of the battery; QN is the rated capacity of the battery, so Q is (1-SOC) QN。
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A wind-solar hybrid power generation and storage device for an electric automobile is characterized by comprising a solar thin-film battery (1) and a light sensor (7) which are arranged on an automobile middle net, a wind power generation device (9) and a wind power generation controller (10) which are arranged on the top of the automobile, a solar charging controller (2) and a storage battery (4) which are arranged in the automobile, wherein the solar thin-film battery (7) is arranged on the automobile middle net through a horizontal steering engine (5) and a vertical steering engine (6), the solar charging controller (2) is electrically connected with the solar thin-film battery (1), the automobile middle controller (3), the storage battery (4), the horizontal steering engine (5), the vertical steering engine (6) and the light sensor (7), the wind power generation device (9) on the top of the automobile is electrically connected with the wind power generation controller (10), and the wind power generation controller (10) is electrically connected with the storage battery (4, the storage battery (4) is electrically connected with the automobile central control (3) and supplies power to the automobile central control.
2. The wind-solar hybrid power generation and storage device for the electric automobile according to claim 1, wherein the solar charging controller (1) and the wind power generation controller (10) comprise an MCU processor, and a charging management chip, a relay, a memory, an interface communication module and a charging and discharging interface which are electrically connected with the MCU processor.
3. The wind-solar hybrid power generation and storage device for the electric automobile according to claim 2, wherein the interface communication module is a serial port communication module, a CAN bus communication module or a USB communication module.
4. The wind-solar hybrid power generation and storage device for the electric automobile according to claim 1, wherein the illumination sensors (7) are distributed at four corners of the solar thin-film battery (7).
5. The wind-solar hybrid power generation and storage device for the electric automobile according to claim 2, wherein the charging management chip is connected with a solar thin film battery (7), the relay is connected with a storage battery, and the interface communication module is connected with an automobile central control unit (3).
6. The wind-solar hybrid power generation and storage device for the electric automobile according to claim 1, wherein the solar thin film battery (7) is mounted on a support plate (8), and the support plate (8) is sequentially mounted on an automobile middle net through a vertical steering engine (6) and a horizontal steering engine (5).
7. The wind-solar hybrid power generation and storage device for the electric automobile according to claim 1, wherein the wind power generation device (9) comprises a telescopic rod (91) rotatably connected to the top of the automobile through a bolt (96), the top of the telescopic rod (91) is connected with a power generation module (92), the front end of the power generation module (92) is connected with a fan blade (93), the rear end of the power generation module (92) is connected with a balance wing (94), a rotating shaft is arranged between the fan blade (93) and the balance wing (94) and penetrates through the power generation module (92), and the power output end of the power generation module (92) is connected with the wind power generation controller (10) through a lead (95).
8. A power generation calculation method of a wind-solar hybrid power generation and storage device for an electric automobile is characterized by comprising the following steps:
s1, detecting the open-circuit voltage at two ends of the battery to obtain the initial capacity SOC of the battery0；
S2, estimating the SOC by combining an open-circuit voltage method and an ampere-hour integration method;
s3, estimating the power consumption Q by combining an open-circuit voltage method and an ampere-hour integration method;
and S4, the battery power generation amount can be reversely deduced according to the power consumption Q.
9. The power generation calculation method of the wind-solar hybrid power generation and storage device for the electric vehicle according to claim 7, wherein the SOC is estimated by combining an open-circuit voltage method and an ampere-hour integration method, and specifically comprises:
obtaining initial capacity SOC of battery by detecting open-circuit voltage at two ends of battery0Then, then
SOC0＝(U0-n)/(m-n) (1)
Wherein U is0An open circuit voltage for the battery; m isAnd n is a coefficient;
the SOC is estimated by combining an open-circuit voltage method and an ampere-hour integration method, and the method comprises the following steps:
Figure FDA0002799990810000021
wherein QNIs the rated capacity of the battery; i is charging and discharging current (the current is a negative value during charging and the current is a positive value during discharging); k is a constant related to temperature and charge-discharge efficiency factor;
K＝Kt×η (3)
wherein Kt is a temperature correction coefficient; eta is a charge-discharge efficiency factor, and eta is obtained by a Peukert equation.
10. The power generation calculation method of the wind-solar hybrid power generation and storage device for the electric vehicle according to claim 8, wherein the temperature correction coefficient Kt is calculated by the formula:
Kt＝1+0.008(Ta-T), wherein TaIs the standard temperature; t is a set temperature;
the calculation method of the eta comprises the following steps:
the Peukert equation can obtain the relation formula of available electric quantity and discharge current
K＝A×In-1 (4)
Wherein I is a discharge current; a is a cell constant relating to the active material, and A and n are the same as long as the initial conditions are the same, so
η ＝(I/IN)n-1 (5)
Wherein INFor the rated current, a and n (n is a constant related to the cell structure, particularly the plate thickness, and has a value of 1.15 to 1.42) can be determined by measuring two sets of I.
CN202011346142.5A 2020-11-25 2020-11-25 Wind-solar complementary power generation and storage device for electric automobile and power generation calculation method Withdrawn CN112477611A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023230681A1 (en) * 2022-05-30 2023-12-07 Tusset Gilberto Carlos Rotor provided with self-adjustable blades for converting kinetic energy into rotary movement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023230681A1 (en) * 2022-05-30 2023-12-07 Tusset Gilberto Carlos Rotor provided with self-adjustable blades for converting kinetic energy into rotary movement

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