CN109768561A - A kind of Control of Electric Vehicles method and system - Google Patents

A kind of Control of Electric Vehicles method and system Download PDF

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Publication number
CN109768561A
CN109768561A CN201811544215.4A CN201811544215A CN109768561A CN 109768561 A CN109768561 A CN 109768561A CN 201811544215 A CN201811544215 A CN 201811544215A CN 109768561 A CN109768561 A CN 109768561A
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China
Prior art keywords
battery
electric
power
control
power supply
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CN201811544215.4A
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Chinese (zh)
Inventor
宋泽琳
雷龙
杨中厦
高小丽
郭清风
冯维雄
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN201811544215.4A priority Critical patent/CN109768561A/en
Publication of CN109768561A publication Critical patent/CN109768561A/en
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Abstract

The present invention relates to a kind of Control of Electric Vehicles method and system, control method includes: the remaining capacity that the battery of electric car is obtained when the battery of electric car is connected by charge-discharge circuit with power supply grid;Judge whether remaining capacity is greater than preset threshold;When remaining capacity is greater than preset threshold, control battery is discharged by charge-discharge circuit to power supply grid.The remaining capacity that the embodiment of the present invention passes through acquisition battery, when the remaining capacity of battery is greater than preset threshold, control battery access power supply grid discharges, electric energy is provided for power supply grid with stable power-supplying power grid, realize the supplement of the power consumption to the power transmission process of power grid, influence of a large amount of accesses of battery to power grid is reduced, the stability of power supply grid is improved.

Description

A kind of Control of Electric Vehicles method and system
Technical field
The present invention relates to technical field of battery management more particularly to a kind of Control of Electric Vehicles method and system.
Background technique
Batteries of electric automobile divides two major classes, battery and fuel cell.Battery is suitable for pure electric automobile, including plumbic acid Battery, nickel-metal hydride battery, sodium-sulphur battery, serondary lithium battery, air cell.Fuel cell is exclusively used in fuel cell electric vehicle, Including alkaline fuel cell, phosphoric acid fuel cell, molten carbonate fuel cell, solid oxide fuel cell, proton exchange Membrane cell, direct methanol fuel cell.
The large-scale application of electric car and renewable energy be reply non-renewable energy gradually exhausted, global warming and The effective way of the problems such as environmental pollution.However, electric car and renewable energy have intermittent, randomness and do not know Property, they it is a large amount of access will necessarily safe, high-quality, economical operation defeated to electric power, distribution system bring new influence, to biography System power grid architecture and technology, Power System Reliability and stability bring significant challenge.
Summary of the invention
Of the existing technology in order to solve the problems, such as, at least one embodiment of the present invention provides a kind of electric car control Method and system processed.
In a first aspect, the embodiment of the invention provides a kind of Control of Electric Vehicles method, the control method includes:
When the battery of electric car is connected by charge-discharge circuit with power supply grid, the electric car is obtained The remaining capacity of battery;
Judge whether the remaining capacity is greater than preset threshold;
When the remaining capacity is greater than preset threshold, the battery is controlled by the charge-discharge circuit to the confession Power grid electric discharge.
Based on the above-mentioned technical proposal, the embodiment of the present invention can also make following improvement.
With reference to first aspect, in the first embodiment of first aspect, the control battery is filled by described Before discharge circuit discharges to the power supply grid, the control method further include:
When the remaining capacity is greater than preset threshold, the stroke planning table of the electric car is obtained;
Whether there are stroke rule when judging that the battery is discharged to the power supply grid according to the stroke planning table It draws;
If controlling the battery without stroke planning and being discharged by the charge-discharge circuit to the power supply grid.
The first embodiment with reference to first aspect, in second of embodiment of first aspect, the control method is also Include:
If there is stroke planning, obtain the prediction power consumption of the stroke planning, according to the residual electric quantity with it is described pre- It surveys power consumption and calculates electricity surplus capacity;
Judge the size of the electricity surplus capacity and the second preset threshold;
If the electricity surplus capacity is greater than second preset threshold, controls the battery and pass through the charge and discharge electricity The electric discharge of power supply grid described in road direction.
First or second kind embodiment with reference to first aspect, in the third embodiment of first aspect, the control Before the battery is discharged by the charge-discharge circuit to the power supply grid, the control method further include:
Obtain the electricity consumption situation of the power supply grid;
Judge whether the power supply grid is in peak times of power consumption according to the electricity consumption situation;
If the power supply grid is in peak times of power consumption, the battery is controlled by the charge-discharge circuit to described Power supply grid electric discharge.
The third embodiment with reference to first aspect, in the 4th kind of embodiment of first aspect, the control method is also Include:
Obtain the generated output of the photovoltaic system on the electric car;
Obtain the energy consumption power of the vehicle load of the electric car;
Judge the size of the generated output Yu the energy consumption power;
When the generated output is greater than the energy consumption power, it is negative for the electric car to control the photovoltaic system Energy supply is carried, and is charged for the battery;
When the generated output is equal to the energy consumption power, it is negative for the electric car to control the photovoltaic system Carry energy supply.
When the generated output is less than the energy consumption power, it is default to judge whether the electric discharge of the battery is greater than Over-discharge voltage controls the photovoltaic system and institute when the electric discharge of the battery is greater than or equal to the default over-discharge voltage Stating battery is electric car load energy supply, when the electric discharge of the battery is less than the default over-discharge voltage, control The photovoltaic system is electric car load energy supply, and disconnects the connection of the battery and vehicle load.
Second aspect, the embodiment of the invention provides a kind of control system of electric automobile, comprising: battery, charging interface, Bidirectional control device, accumulator status acquisition device, interface connection status acquisition device and controller;
The battery is connect by charge-discharge circuit with charging interface;
The accumulator status acquisition device is connect with the battery;
The interface connection status acquisition device is connect with the charging interface;
The controller input terminal connects with the accumulator status acquisition device and interface connection status acquisition device respectively It connects, output end is connect with the input terminal of the bidirectional control device;
The output end of the bidirectional control device is connect with the charge-discharge circuit.
In conjunction with second aspect, in the first embodiment of second aspect, the control system further include: be stored with stroke The memory of planning table;
The memory is connect with the input terminal of the controller.
In conjunction with second aspect, in second of embodiment of second aspect, the charge-discharge circuit is the change of two-way alternating current-direct current Change circuit.
In conjunction with second aspect, in the third embodiment of second aspect, the company of the charge-discharge circuit and charging interface Filter circuit is provided on link.
In conjunction with second aspect, in the 4th kind of embodiment of second aspect, the control system further include: photovoltaic system;
Input terminal is connect with the photovoltaic system, the ac-dc conversion circuit that output end is connect with vehicle load;
The battery is separately connected the photovoltaic system and ac-dc conversion electricity by bidirectional direct current converter The input terminal on road;
Input terminal is connect with the photovoltaic system, the photovoltaic power detection device that output end is connect with the controller;
Input terminal and electric car load connect, power detection needed for the load that output end is connect with the controller Device;
The output end of the bidirectional control device is also connect with the bidirectional direct current converter.
In conjunction with the 4th kind of embodiment of second aspect, in the 5th kind of embodiment of second aspect, the battery and institute It states and is provided with filter circuit in the connection line of photovoltaic system.
In conjunction with the 4th kind of embodiment of second aspect, in the 6th kind of embodiment of second aspect, the bidirectional, dc becomes Changing circuit includes: the first IGBT module, the second IGBT module, inductance and capacitor;
The battery, inductance, the first IGBT module and photovoltaic system are sequentially connected in series;
Second IGBT module is in parallel with the series circuit of the battery and inductance;
The capacitor is in parallel with the photovoltaic system.
In conjunction with second aspect or the first, second, third, fourth, the 5th or the 6th kind of embodiment of second aspect, second In 7th kind of embodiment of aspect, the control system further include: obtain the power grid electricity consumption situation of the electricity consumption situation of power supply grid Acquisition device;
The power grid electricity consumption situation acquisition device is connect with the input terminal of the controller.
Above-mentioned technical proposal of the invention has the advantages that the embodiment of the present invention is stored by obtaining compared with prior art The remaining capacity of battery, when the remaining capacity of battery is greater than preset threshold, control battery access power supply grid is put Electricity provides electric energy for power supply grid with stable power-supplying power grid, realizes the benefit of the power consumption to the power transmission process of power grid It fills, reduces influence of a large amount of accesses of battery to power grid, improve the stability of power supply grid.
Detailed description of the invention
Fig. 1 is a kind of Control of Electric Vehicles method flow schematic diagram provided in an embodiment of the present invention;
Fig. 2 be another embodiment of the present invention provides a kind of Control of Electric Vehicles method flow schematic diagram;
Fig. 3 is a kind of Control of Electric Vehicles method flow schematic diagram one that further embodiment of this invention provides;
Fig. 4 be further embodiment of this invention provide a kind of Control of Electric Vehicles method flow schematic diagram secondly;
Fig. 5 is a kind of control system of electric automobile structural schematic diagram one that further embodiment of this invention provides;
Fig. 6 be further embodiment of this invention provide a kind of control system of electric automobile structural schematic diagram secondly;
Fig. 7 be further embodiment of this invention provide a kind of control system of electric automobile structural schematic diagram thirdly;
Fig. 8 be further embodiment of this invention provide a kind of control system of electric automobile structural schematic diagram its four;
Fig. 9 be further embodiment of this invention provide a kind of control system of electric automobile structural schematic diagram its five.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of Control of Electric Vehicles method provided in an embodiment of the present invention, the control method include:
S11, when the battery of electric car is connected by charge-discharge circuit with power supply grid, obtain the electronic vapour The remaining capacity of the battery of vehicle.
In the present embodiment, can be detected by physical switch or breakover detecting device electric car battery whether Connect with power supply grid, and according to the validation of information battery of physical switch or breakover detecting device whether with power supply grid connect It connects, for example, electric car is connect by the charging cable of charging interface and charging pile on Rechargeable vehicle with power supply grid, physics is opened Pass can be the plug and socket being separately positioned on charging interface and charging cable, when charging cable is connect with charging interface, insert Head and socket also match clamping, and generate corresponding switch response, confirm whether battery connect with power supply grid with this, lead Logical detection device can be current detection means or voltage check device, when supplying in the charging circuit for detect battery When current or voltage in power grid, confirm that the battery is connected with power supply grid.
In the present embodiment, the residue electricity of battery can be detected by open circuit voltage method, electric discharge, internal resistance method or ampere-hour method Amount can be balanced the specific detection method of selection according to required detection accuracy and required detection time.
S12, judge whether the remaining capacity is greater than preset threshold.
When the remaining capacity is greater than preset threshold, the battery is controlled by the charge-discharge circuit to the confession Power grid electric discharge.
In the present embodiment, the remaining capacity of battery is compared with preset threshold, judges the surplus of the battery Whether remaining electricity is greater than preset threshold, and when the remaining capacity of battery is greater than preset threshold, control battery passes through charge and discharge Circuit discharges to power supply grid, since loss of power supply grid during power transmission is very huge, so passing in electric power The voltage of electric power can be amplified during defeated, to ensure the safety of remote power transmission, reduce the electric energy on transmission line It loses and equipment and material on transmission line can be saved since voltage is higher, while reducing thunder and lightning to transmission line It destroys, but the power consumption during power transmission can make the voltage of electric power decline, so meeting during power transmission There is the Compact Power Plant of setting access power grid, supplemented by Compact Power Plant for the power consumption during power transmission, To ensure the voltage of power during power transmission, in the present embodiment, when battery remaining capacity is greater than preset threshold, lead to It crosses battery to discharge to power supply grid, realizes the supplement of the power consumption to the power transmission process of power grid, reduce electric power storage Influence of a large amount of accesses in pond to power grid.
In the present embodiment, when remaining capacity is less than or equal to preset threshold, illustrate the residue electricity of battery at this time Amount is not enough to allow user to carry out subsequent stroke or remaining capacity is unsatisfactory for the use of user, so battery should be after at this time It is continuous to charge, without that should discharge to power supply grid, since the daily ratio for accounting for whole day using duration of automobile is smaller, generally The use duration of electric household automobile does not exceed two hours, so, the duration that battery is in full electricity can be significantly longer than low The duration of electricity.
In the present embodiment, preset threshold can be configured according to the use demand of user, for example user needs to carry out one When secondary long journey, at this point, the electricity of battery should be at the optimum state for expiring electricity, preset threshold can be set greater than or be waited In the electricity full value of battery, and user is such as not required to go on a long journey, and the stroke next time with vehicle plan is closer, can will preset Threshold value is arranged between 90 80 percent to percent, higher to deal with emergency situations in the remaining capacity for guaranteeing battery Under the premise of, it can be discharged by battery to power supply grid, it, can to avoid the charge and discharge of battery at preset threshold back and forth To be set as battery when being greater than preset threshold, control battery is discharged by charge-discharge circuit to power supply grid, until storing Stop electric discharge when the electricity of battery is to another threshold value for being less than preset threshold, and charges again for battery, preset threshold It can be set according to the use of user with the section span of another threshold value, for example, preset threshold can be set as percent 95 electricity, another threshold value are set as 80 percent electricity.
In the present embodiment, since the process that battery carries out charge and discharge has certain loss, and power supply grid pair Battery carries out charging and charges, so when battery discharges to power supply grid, it is also desirable to the electricity of electric discharge It is calculated, while the loss of the electricity and battery according to electric discharge, is suitably raised in the charging standard of power supply grid, according to The discharge electricity amount of battery is provided to user by the standard after up-regulation and is compensated, and to compensate the loss of battery, improving user will be not busy The enthusiasm for the electric car access power grid set, while battery can guarantee the good fortune of power supply grid to power supply grid electric discharge Row.
As shown in Fig. 2, the embodiment of the invention also provides a kind of Control of Electric Vehicles method, with control method shown in Fig. 1 It compares, difference is, the control method includes:
S21, when the battery of electric car is connected by charge-discharge circuit with power supply grid, obtain the electronic vapour The remaining capacity of the battery of vehicle.
In the present embodiment, can be detected by physical switch or breakover detecting device electric car battery whether Connect with power supply grid, and according to the validation of information battery of physical switch or breakover detecting device whether with power supply grid connect It connects, for example, electric car is connect by the charging cable of charging interface and charging pile on Rechargeable vehicle with power supply grid, physics is opened Pass can be the plug and socket being separately positioned on charging interface and charging cable, when charging cable is connect with charging interface, insert Head and socket also match clamping, and generate corresponding switch response, confirm whether battery connect with power supply grid with this, lead Logical detection device can be current detection means or voltage check device, when supplying in the charging circuit for detect battery When current or voltage in power grid, confirm that the battery is connected with power supply grid.
In the present embodiment, the residue electricity of battery can be detected by open circuit voltage method, electric discharge, internal resistance method or ampere-hour method Amount can be balanced the specific detection method of selection according to required detection accuracy and required detection time.
S22, judge whether the remaining capacity is greater than preset threshold.
In the present embodiment, the remaining capacity of battery is compared with preset threshold, judges the surplus of the battery Whether remaining electricity is greater than preset threshold, and preset threshold can be the power consumption average value according to user's each run process, alternatively, Preset threshold can be the maximum value of the power consumption of all strokes according to user, when remaining capacity is less than or equal to preset threshold When, illustrate that the remaining capacity of battery at this time is not enough to that user is allowed to carry out subsequent stroke or remaining capacity is unsatisfactory for user Use without that should discharge to power supply grid, make since automobile is daily so battery should continue to charge at this time The ratio for accounting for whole day with duration is smaller, and the use duration of general electric household automobile does not exceed two hours, so, battery Duration in full electricity can be significantly longer than the duration of low battery.
S23, when the remaining capacity be greater than preset threshold when, obtain the stroke planning table of the electric car.
In the present embodiment, when remaining capacity is larger, the stroke planning table of electric vehicle is obtained, stroke planning table can be User shifts to an earlier date the planning chart of typing, and stroke planning table is also possible to be generated according to the daily driving habits of user, for example, each work The morning of day carries out carrying out using vehicle with vehicle or the evening of every workday, every daily vehicle frequency of certain period is higher Stroke planning chart can be automatically generated during this period of time.
S24, whether there is row when judging that the battery is discharged to the power supply grid according to the stroke planning table Journey planning.
If controlling the battery without stroke planning and being discharged by the charge-discharge circuit to the power supply grid.
In the present embodiment, when judging that battery discharges to power supply grid, whether there is stroke planning in stroke planning table, i.e., When remaining capacity is greater than preset threshold, whether there is stroke planning in stroke planning table, if controlling battery without stroke planning It is powered by charge-discharge circuit to power supply grid, if there is stroke planning at this time, stops controlling battery to power supply grid power supply.
As shown in figure 3, the embodiment of the invention also provides a kind of Control of Electric Vehicles method, with control method shown in Fig. 2 It compares, difference is, the control method includes:
S31, when the battery of electric car is connected by charge-discharge circuit with power supply grid, obtain the electronic vapour The remaining capacity of the battery of vehicle.
In the present embodiment, can be detected by physical switch or breakover detecting device electric car battery whether Connect with power supply grid, and according to the validation of information battery of physical switch or breakover detecting device whether with power supply grid connect It connects, for example, electric car is connect by the charging cable of charging interface and charging pile on Rechargeable vehicle with power supply grid, physics is opened Pass can be the plug and socket being separately positioned on charging interface and charging cable, when charging cable is connect with charging interface, insert Head and socket also match clamping, and generate corresponding switch response, confirm whether battery connect with power supply grid with this, lead Logical detection device can be current detection means or voltage check device, when supplying in the charging circuit for detect battery When current or voltage in power grid, confirm that the battery is connected with power supply grid.
In the present embodiment, the residue electricity of battery can be detected by open circuit voltage method, electric discharge, internal resistance method or ampere-hour method Amount can be balanced the specific detection method of selection according to required detection accuracy and required detection time.
S32, judge whether the remaining capacity is greater than preset threshold.
In the present embodiment, the remaining capacity of battery is compared with preset threshold, judges the surplus of the battery Whether remaining electricity is greater than preset threshold, and preset threshold can be the power consumption average value according to user's each run process, alternatively, Preset threshold can be the maximum value of the power consumption of all strokes according to user, when remaining capacity is less than or equal to preset threshold When, illustrate that the remaining capacity of battery at this time is not enough to that user is allowed to carry out subsequent stroke or remaining capacity is unsatisfactory for user Use without that should discharge to power supply grid, make since automobile is daily so battery should continue to charge at this time The ratio for accounting for whole day with duration is smaller, and the use duration of general electric household automobile does not exceed two hours, so, battery Duration in full electricity can be significantly longer than the duration of low battery.
S33, when the remaining capacity be greater than preset threshold when, obtain the stroke planning table of the electric car.
In the present embodiment, when remaining capacity is larger, the stroke planning table of electric vehicle is obtained, stroke planning table can be User shifts to an earlier date the planning chart of typing, and stroke planning table is also possible to be generated according to the daily driving habits of user, for example, each work The morning of day carries out carrying out using vehicle with vehicle or the evening of every workday, every daily vehicle frequency of certain period is higher Stroke planning chart can be automatically generated during this period of time.
S34, whether there is row when judging that the battery is discharged to the power supply grid according to the stroke planning table Journey planning.
In the present embodiment, when judging that battery discharges to power supply grid, whether there is stroke planning in stroke planning table, i.e., When remaining capacity is greater than preset threshold, whether there is stroke planning in stroke planning table.
If S35, having stroke planning, the prediction power consumption of the stroke planning is obtained, according to the residual electric quantity and institute It states prediction power consumption and calculates electricity surplus capacity.
In the present embodiment, when having stroke planning in stroke planning table, the prediction power consumption of the trip planning is obtained, than Such as, the travel paths length of stroke planning and prediction operation duration, run according to travel paths length computation power consumption and prediction The power consumption of duration, the two are added i.e. prediction power consumption;It is rich that electricity is calculated according to the remaining capacity of battery and prediction power consumption Surplus;If directly controlling battery without stroke planning and being powered by charge-discharge circuit to power supply grid.
S36, the size for judging the electricity surplus capacity and the second preset threshold.
If the electricity surplus capacity is greater than second preset threshold, controls the battery and pass through the charge and discharge electricity The electric discharge of power supply grid described in road direction.
In the present embodiment, judge whether electricity surplus capacity is greater than the second preset threshold, when electricity surplus capacity is greater than second When preset threshold, after illustrating that battery completes stroke planning, remaining electricity also meets preset requirement, can control at this time described Battery is discharged by charge-discharge circuit to power supply grid, if electricity surplus capacity is less than the second preset threshold, illustrates battery Remaining capacity be not enough to complete stroke planning, then stop control battery phase power supply grid electric discharge, avoid user from needing to use vehicle When, the too low stroke plan for being unable to complete user of accumulator electric-quantity.
As shown in figure 4, being controlled the embodiment of the invention also provides a kind of Control of Electric Vehicles method with described in above-described embodiment Method processed is compared, and difference is, the control method includes:
S41, the control battery obtain the confession to power supply grid electric discharge by the charge-discharge circuit before The electricity consumption situation of power grid.
In the present embodiment, when needing battery to discharge by charge-discharge circuit to power supply grid, power supply grid is obtained Electricity consumption situation, the electricity consumption situation of power supply grid section in different times is inconsistent, for example, in 6 points to 10 times of night Section, every household can open electrical appliance, be now in peak of power consumption, and night, after every household is fallen asleep, power supply electricity at this time Net is in electricity consumption ebb.
S42, judge whether the power supply grid is in peak times of power consumption according to the electricity consumption situation.
If the power supply grid is in peak times of power consumption, the battery is controlled by the charge-discharge circuit to described Power supply grid electric discharge.
In the present embodiment, when power supply grid is in peak of power consumption, illustrate that power supply grid needs to carry out electricity benefit at this time It fills, then controls battery and discharged by charge-discharge circuit to power supply grid, when power supply grid is not in peak of power consumption, power supply electricity The operating pressure of net is not too large, is supported so not needing battery at this time to power supply grid, and it is logical to stop control battery Charge-discharge circuit is crossed to discharge to power supply grid.
In the present embodiment, the control method further include:
S51, the generated output for obtaining photovoltaic system on the electric car.
S52, obtain the electric car vehicle load energy consumption power.
S53, the size for judging the generated output Yu the energy consumption power.
When the generated output is greater than the energy consumption power, it is negative for the electric car to control the photovoltaic system Energy supply is carried, and is charged for the battery.
When generated output is greater than energy consumption power, then passing through photovoltaic system is electric car function, while being battery It charges.
When the generated output is equal to the energy consumption power, it is negative for the electric car to control the photovoltaic system Carry energy supply.
It is electric car load energy supply by photovoltaic system when generated output is equal to consumption power.
When the generated output is less than the energy consumption power, it is default to judge whether the electric discharge of the battery is greater than Over-discharge voltage controls the photovoltaic system and institute when the electric discharge of the battery is greater than or equal to the default over-discharge voltage Stating battery is electric car load energy supply, when the electric discharge of the battery is less than the default over-discharge voltage, control The photovoltaic system is electric car load energy supply, and disconnects the connection of the battery and vehicle load.
When generated output is less than energy consumption power, when being energized by photovoltaic system to load, needed for remaining load Energy demand obtained from battery, judge whether the electric discharge of battery is greater than or equal to over-discharge voltage at this time, if so, saying The remaining capacity of bright battery, which can also be negative, is loaded into capable energy supply, if it is not, then illustrating that the remaining capacity of battery is not enough to be negative It is loaded into capable energy supply, battery damage can be made by continuing to use battery and being negative to be loaded into row and energize, and disconnect battery in time and automobile is negative The connection of load is to improve the service life of battery.
As shown in figure 5, the embodiment of the invention provides a kind of control system of electric automobile, comprising: battery, charging Mouth, bidirectional control device, accumulator status acquisition device, interface connection status acquisition device and controller.
In the present embodiment, the battery is connect by charge-discharge circuit with charging interface, and battery passes through charge and discharge Circuit is connect with charging interface, and charging interface can be connect to connect power supply grid with charging pile.
The accumulator status acquisition device is connect with the battery, obtains electric power storage by accumulator status acquisition device The state parameter in pond;For example, the parameters such as battery remaining capacity, battery discharge scenario.
In the present embodiment, the interface connection status acquisition device is connect with the charging interface;Pass through Interface status Connection status acquisition device obtains the use state of charging interface, for example, the connection status of charging interface and power supply grid.
In the present embodiment, the controller input terminal connect shape with the accumulator status acquisition device and interface respectively The connection of state acquisition device, output end are connect with the input terminal of the bidirectional control device;The electric power storage of controller confirmation electric car When pond is connected by charge-discharge circuit with power supply grid, the remaining capacity of the battery is obtained, and judges the remaining electricity Whether amount is greater than preset threshold, and the output end of the bidirectional control device is connect with the charge-discharge circuit, when the remaining electricity When amount is greater than preset threshold, control instruction is sent to bidirectional control device by controller, charge-discharge circuit is controlled, so that electric power storage Pond is discharged to the power supply grid, when the remaining capacity is less than or equal to preset threshold, by controller to double-direction control Device sends control instruction, controls charge-discharge circuit, so that power supply grid charges to battery.
In the present embodiment, the charge-discharge circuit is two-way ac-dc conversion circuit.
In the present embodiment, filter circuit is provided in the connection line of the charge-discharge circuit and charging interface.
As shown in fig. 6, the embodiment of the invention provides a kind of control system of electric automobile, comprising: battery, charging Mouth, bidirectional control device, accumulator status acquisition device, interface connection status acquisition device and controller;The control system Further include: it is stored with the memory of stroke planning table.
In the present embodiment, the battery is connect by charge-discharge circuit with charging interface, and battery passes through charge and discharge Circuit is connect with charging interface, and charging interface can be connect to connect power supply grid with charging pile.
The accumulator status acquisition device is connect with the battery, obtains electric power storage by accumulator status acquisition device The state parameter in pond;For example, the parameters such as battery remaining capacity, battery discharge scenario.
In the present embodiment, the interface connection status acquisition device is connect with the charging interface;Pass through Interface status Connection status acquisition device obtains the use state of charging interface, for example, the connection status of charging interface and power supply grid.
In the present embodiment, the controller input terminal connect shape with the accumulator status acquisition device, interface respectively State acquisition device is connected with memory, and output end is connect with the input terminal of the bidirectional control device;Controller confirms electronic vapour When the battery of vehicle is connected by charge-discharge circuit with power supply grid, the remaining capacity of the battery is obtained, and judges institute It states whether remaining capacity is greater than preset threshold, when the remaining capacity is greater than preset threshold, obtains the row of the electric car Whether journey planning table has stroke rule when judging that the battery is discharged to the power supply grid according to the stroke planning table It draws, the output end of the bidirectional control device is connect with the charge-discharge circuit, when there is stroke planning, by controller to double Control instruction is sent to control device, controls charge-discharge circuit, so that power supply grid charges to battery, when not having stroke planning When, control instruction is sent to bidirectional control device by controller, controls charge-discharge circuit, so that battery is electric to the power supply Net electric discharge.
As shown in fig. 7, the embodiment of the invention provides a kind of control system of electric automobile, comprising: battery, charging Mouth, bidirectional control device, accumulator status acquisition device, interface connection status acquisition device and controller;The control system Further include: it is stored with the memory of stroke planning table.
In the present embodiment, the battery is connect by charge-discharge circuit with charging interface, and battery passes through charge and discharge Circuit is connect with charging interface, and charging interface can be connect to connect power supply grid with charging pile.
The accumulator status acquisition device is connect with the battery, obtains electric power storage by accumulator status acquisition device The state parameter in pond;For example, the parameters such as battery remaining capacity, battery discharge scenario.
In the present embodiment, the interface connection status acquisition device is connect with the charging interface;Pass through Interface status Connection status acquisition device obtains the use state of charging interface, for example, the connection status of charging interface and power supply grid.
In the present embodiment, the controller input terminal connect shape with the accumulator status acquisition device, interface respectively State acquisition device is connected with memory, and output end is connect with the input terminal of the bidirectional control device;Controller confirms electronic vapour When the battery of vehicle is connected by charge-discharge circuit with power supply grid, the remaining capacity of the battery is obtained, and judges institute It states whether remaining capacity is greater than preset threshold, when the remaining capacity is greater than preset threshold, obtains the row of the electric car Whether journey planning table has stroke rule when judging that the battery is discharged to the power supply grid according to the stroke planning table Draw, the output end of the bidirectional control device is connect with the charge-discharge circuit, when there is no stroke planning, by controller to Bidirectional control device sends control instruction, controls charge-discharge circuit, so that battery discharges to power supply grid.
In the present embodiment, the controller includes: calculator, comparator and control instruction generator;When there is stroke rule Draw when, calculator obtains the prediction power consumption of the stroke planning, and according to the residual electric quantity with the prediction power consumption meter Electricity surplus capacity is calculated, the size of the electricity surplus capacity and the second preset threshold is judged by comparator, if the electricity is more than needed Amount is greater than second preset threshold, then generates control instruction by control instruction generator and be sent to bidirectional control device, control Charge-discharge circuit processed, so that power supply grid charges to battery.
As shown in figure 8, the embodiment of the invention provides a kind of control system of electric automobile, and compared with above-described embodiment, area It is not, control system of electric automobile further include: power supply grid electricity consumption situation acquisition device;
The power supply grid electricity consumption situation acquisition device is connect with the controller;The power supply grid electricity consumption situation is used for Electricity consumption situation is obtained, the controller judges whether the power supply grid is in peak times of power consumption according to the electricity consumption situation, supplies When power grid is in peak times of power consumption, the voltage and current of power supply grid is told somebody what one's real intentions are, so according to the voltage and current of power supply grid It can confirm whether power supply grid is in peak times of power consumption;If the power supply grid is in peak times of power consumption, pass through controller Control instruction is sent to bidirectional control device, controls charge-discharge circuit, so that battery discharges to power supply grid, if power supply grid Peak times of power consumption are not in, then control instruction is generated by control instruction generator and is sent to bidirectional control device, control charge and discharge Circuit, so that power supply grid charges to battery.
As shown in figure 9, the embodiment of the invention provides a kind of control system of electric automobile, comprising: battery, battery shape State acquisition device and controller;The control system further include: photovoltaic system.
In the present embodiment, input terminal is connect with the photovoltaic system, and the alternating current-direct current that output end is connect with vehicle load becomes Change circuit;Since the electric current that photovoltaic system generates is direct current, the electricity consumption of vehicle load is direct current, by vehicle load Ac-dc conversion circuit is set before input terminal, and avoiding misconnection from entering alternating current causes vehicle load impaired.
In the present embodiment, the battery is separately connected the photovoltaic system and described by bidirectional direct current converter The input terminal of ac-dc conversion circuit;Battery is separately connected photovoltaic system and ac-dc conversion by bidirectional direct current converter The input terminal of circuit realizes photovoltaic system to charge the battery by bidirectional direct current converter, while battery can also be with Photovoltaic system passes through ac-dc conversion circuit simultaneously as vehicle load power supply.
In the present embodiment, input terminal is connect with the photovoltaic system, the photovoltaic function that output end is connect with the controller Rate detection device;Photovoltaic power detection device is connect with photovoltaic system, for detecting the generated output of photovoltaic system, is exported simultaneously End end is connect with controller, sends the generated output of photovoltaic system in controller.
In the present embodiment, input terminal and electric car load connect, and output end is connect negative with the controller Power detection device needed for carrying;Power detection device needed for loading and electric car load connect, detection electric car load Power is consumed, and sends consumption power in controller.
In the present embodiment, the output end of the bidirectional control device is also connect with the bidirectional direct current converter, institute Controller output end is stated to connect with the input terminal of the bidirectional control device;Controller is according to generated output and consumption power to double Control instruction is sent to control device, the access of bidirectional, dc circuit is adjusted by bidirectional control device, for example, working as the power generation When power is greater than the energy consumption power, controlling the photovoltaic system is electric car load energy supply, and is the storage Battery charging;When the generated output is equal to the energy consumption power, controlling the photovoltaic system is the electric car Load energy supply;When the generated output is less than the energy consumption power, it is pre- to judge whether the electric discharge of the battery is greater than If over-discharge voltage, when the electric discharge of the battery be greater than or equal to the default over-discharge voltage when, control the photovoltaic system and The battery is electric car load energy supply, when the electric discharge of the battery is less than the default over-discharge voltage, control Making the photovoltaic system is electric car load energy supply, and disconnects the connection of the battery and vehicle load.
In the present embodiment, filter circuit is provided in the connection line of the battery and the photovoltaic system.
In the present embodiment, the bidirectional direct current converter includes: the first IGBT module, the second IGBT module, inductance And capacitor;The battery, inductance, the first IGBT module and photovoltaic system are sequentially connected in series;Second IGBT module with it is described The series circuit of battery and inductance is in parallel;The capacitor is in parallel with the photovoltaic system.Pass through bidirectional control device control the The conducting direction of one IGBT module and the second IGBT module realizes the switching to the conducting direction of bidirectional direct current converter.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations;Although Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features; And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and Range.

Claims (13)

1. a kind of Control of Electric Vehicles method, which is characterized in that the control method includes:
When the battery of electric car is connected by charge-discharge circuit with power supply grid, the electric power storage of the electric car is obtained The remaining capacity in pond;
Judge whether the remaining capacity is greater than preset threshold;
When the remaining capacity is greater than preset threshold, it is electric to the power supply by the charge-discharge circuit to control the battery Net electric discharge.
2. Control of Electric Vehicles method according to claim 1, which is characterized in that the control battery passes through institute State charge-discharge circuit to the power supply grid electric discharge before, the control method further include:
When the remaining capacity is greater than preset threshold, the stroke planning table of the electric car is obtained;
Whether there is stroke planning when judging that the battery is discharged to the power supply grid according to the stroke planning table;
If controlling the battery without stroke planning and being discharged by the charge-discharge circuit to the power supply grid.
3. Control of Electric Vehicles method according to claim 2, which is characterized in that the control method further include:
If there is stroke planning, the prediction power consumption of the stroke planning is obtained, is consumed according to the residual electric quantity with the prediction Electricity calculates electricity surplus capacity;
Judge the size of the electricity surplus capacity and the second preset threshold;
If the electricity surplus capacity be greater than second preset threshold, control the battery by the charge-discharge circuit to The power supply grid electric discharge.
4. any Control of Electric Vehicles method according to claim 1~3, which is characterized in that the control storage Before battery is discharged by the charge-discharge circuit to the power supply grid, the control method further include:
Obtain the electricity consumption situation of the power supply grid;
Judge whether the power supply grid is in peak times of power consumption according to the electricity consumption situation;
If the power supply grid is in peak times of power consumption, the battery is controlled by the charge-discharge circuit to the power supply Power grid electric discharge.
5. Control of Electric Vehicles method according to claim 4, which is characterized in that the control method further include:
Obtain the generated output of the photovoltaic system on the electric car;
Obtain the energy consumption power of the vehicle load of the electric car;
Judge the size of the generated output Yu the energy consumption power;
When the generated output is greater than the energy consumption power, controlling the photovoltaic system is that electric car load supplies Can, and charge for the battery;
When the generated output is equal to the energy consumption power, controlling the photovoltaic system is that electric car load supplies Energy.
When the generated output is less than the energy consumption power, judge whether the electric discharge of the battery is greater than default over-discharge Voltage controls the photovoltaic system and the storage when the electric discharge of the battery is greater than or equal to the default over-discharge voltage Battery is electric car load energy supply, when the electric discharge of the battery is less than the default over-discharge voltage, described in control Photovoltaic system is electric car load energy supply, and disconnects the connection of the battery and vehicle load.
6. a kind of control system of electric automobile characterized by comprising battery, charging interface, bidirectional control device, electric power storage Pond state acquisition device, interface connection status acquisition device and controller;
The battery is connect by charge-discharge circuit with charging interface;
The accumulator status acquisition device is connect with the battery;
The interface connection status acquisition device is connect with the charging interface;
The controller input terminal is connect with the accumulator status acquisition device and interface connection status acquisition device respectively, defeated Outlet is connect with the input terminal of the bidirectional control device;
The output end of the bidirectional control device is connect with the charge-discharge circuit.
7. control system of electric automobile according to claim 6, which is characterized in that the control system further include: storage There is the memory of stroke planning table;
The memory is connect with the input terminal of the controller.
8. control system of electric automobile according to claim 6, which is characterized in that the charge-discharge circuit is that two-way friendship is straight Flow translation circuit.
9. control system of electric automobile according to claim 6, which is characterized in that the charge-discharge circuit and charging interface Connection line on be provided with filter circuit.
10. control system of electric automobile according to claim 6, which is characterized in that the control system further include: photovoltaic System;
Input terminal is connect with the photovoltaic system, the ac-dc conversion circuit that output end is connect with vehicle load;
The battery is separately connected the photovoltaic system and the ac-dc conversion circuit by bidirectional direct current converter Input terminal;
Input terminal is connect with the photovoltaic system, the photovoltaic power detection device that output end is connect with the controller;
Input terminal and electric car load connect, the dress of power detection needed for the load that output end is connect with the controller It sets;
The output end of the bidirectional control device is also connect with the bidirectional direct current converter.
11. control system of electric automobile according to claim 10, which is characterized in that the battery and the photovoltaic system Filter circuit is provided in the connection line of system.
12. control system of electric automobile according to claim 10, which is characterized in that the bidirectional direct current converter packet It includes: the first IGBT module, the second IGBT module, inductance and capacitor;
The battery, inductance, the first IGBT module and photovoltaic system are sequentially connected in series;
Second IGBT module is in parallel with the series circuit of the battery and inductance;
The capacitor is in parallel with the photovoltaic system.
13. according to the control system of electric automobile any in claim 6~12, which is characterized in that the control system Further include: obtain the power grid electricity consumption situation acquisition device of the electricity consumption situation of power supply grid;
The power grid electricity consumption situation acquisition device is connect with the input terminal of the controller.
CN201811544215.4A 2018-12-17 2018-12-17 A kind of Control of Electric Vehicles method and system Pending CN109768561A (en)

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Application publication date: 20190517