CN115441486A - Light storage charging and discharging battery replacing system and system matching method - Google Patents
Light storage charging and discharging battery replacing system and system matching methodDownload PDFInfo
- Publication number
- CN115441486A CN115441486ACN202210963813.5ACN202210963813ACN115441486ACN 115441486 ACN115441486 ACN 115441486ACN 202210963813 ACN202210963813 ACN 202210963813ACN 115441486 ACN115441486 ACN 115441486A
- Authority
- CN
- China
- Prior art keywords
- charging
- power
- discharging
- battery
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007599dischargingMethods0.000titleclaimsabstractdescription71
- 238000000034methodMethods0.000titleclaimsabstractdescription62
- 238000004146energy storageMethods0.000claimsabstractdescription66
- 230000002457bidirectional effectEffects0.000claimsabstractdescription28
- 238000010248power generationMethods0.000claimsabstractdescription16
- 230000005611electricityEffects0.000claimsabstractdescription13
- WHXSMMKQMYFTQS-UHFFFAOYSA-NLithiumChemical compound[Li]WHXSMMKQMYFTQS-UHFFFAOYSA-N0.000claimsabstractdescription11
- 229910052744lithiumInorganic materials0.000claimsabstractdescription11
- 101150003196PCS1 geneProteins0.000claimsdescription21
- 101100493726Phalaenopsis sp. BIBSY212 geneProteins0.000claimsdescription21
- 101100030895Saccharomyces cerevisiae (strain ATCC 204508 / S288c) RPT4 geneProteins0.000claimsdescription21
- HEZMWWAKWCSUCB-PHDIDXHHSA-N(3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acidChemical compoundO[C@@H]1C=CC(C(O)=O)=C[C@H]1OHEZMWWAKWCSUCB-PHDIDXHHSA-N0.000claimsdescription19
- 238000006243chemical reactionMethods0.000claimsdescription13
- 230000003287optical effectEffects0.000claimsdescription13
- 101150071172PCS2 geneProteins0.000claimsdescription9
- 230000008569processEffects0.000claimsdescription9
- 238000012544monitoring processMethods0.000claimsdescription6
- 239000000203mixtureSubstances0.000claimsdescription5
- 230000005540biological transmissionEffects0.000claimsdescription3
- 238000004891communicationMethods0.000claimsdescription3
- 238000001514detection methodMethods0.000claimsdescription3
- 230000003993interactionEffects0.000claimsdescription3
- XLYOFNOQVPJJNP-UHFFFAOYSA-NwaterSubstancesOXLYOFNOQVPJJNP-UHFFFAOYSA-N0.000claimsdescription3
- 230000000704physical effectEffects0.000claimsdescription2
- 230000001502supplementing effectEffects0.000abstractdescription5
- 230000009471actionEffects0.000description3
- 238000011161developmentMethods0.000description3
- 239000013589supplementSubstances0.000description3
- 238000004378air conditioningMethods0.000description2
- 230000009286beneficial effectEffects0.000description2
- 230000008901benefitEffects0.000description2
- 230000006870functionEffects0.000description2
- 230000010354integrationEffects0.000description2
- 230000006855networkingEffects0.000description2
- 238000005192partitionMethods0.000description2
- 239000000047productSubstances0.000description2
- 230000002159abnormal effectEffects0.000description1
- 230000008859changeEffects0.000description1
- 238000013461designMethods0.000description1
- 238000010586diagramMethods0.000description1
- 238000005516engineering processMethods0.000description1
- 230000007613environmental effectEffects0.000description1
- 230000006872improvementEffects0.000description1
- 238000012986modificationMethods0.000description1
- 230000004048modificationEffects0.000description1
- 238000005457optimizationMethods0.000description1
- 230000009467reductionEffects0.000description1
- 238000012827research and developmentMethods0.000description1
- 238000010187selection methodMethods0.000description1
Images
Classifications
- 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
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
- H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
- 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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/64—Optimising energy costs, e.g. responding to electricity rates
- 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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/80—Exchanging energy storage elements, e.g. removable batteries
- 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
- B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
- 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
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
- 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
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
- 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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
Technical Field
The invention belongs to the technical field of automobiles, and relates to a light storage charging and discharging battery replacing system and a system matching method.
Background
Under the background of policy guidance and environmental crisis, all large automobile enterprises in China vigorously promote the research and development of new energy electric vehicles, and the establishment of a good electric vehicle power supply ecological system is beneficial to the popularization and market promotion of the electric vehicles; meanwhile, as the quantity of electric vehicles is kept to rise year by year, the load bearing capacity of a national power grid is challenged, so that the establishment of the optical storage charging and discharging power conversion system is also significant for balancing the peak-valley load of the power grid.
The existing photovoltaic power generation system, the charging system and the battery replacement system are relatively independent, the technology is continuously broken through and developed in the respective fields at present, but as the associated industry of electric automobiles, the systems are not effectively combined to form an ecosphere for power supplement of the electric automobiles;
in the prior technical scheme, system integration matching is mostly carried out on a photovoltaic power generation system, a lithium battery energy storage system and a charging system;
the patent CN109286199B "energy storage control method and system for grid-connected optical storage and charging system" proposes an optical storage and charging system and control method, and the main innovation points of the system are that the system covers an echelon battery energy storage system and a new battery energy storage system, system classification and integration are performed for different types of new and old batteries, and in addition, power supply modes of a power grid and the energy storage system are designed for different degrees of power grid operation load working conditions, but the electric vehicle discharging system, the battery replacement system and the matching method between systems described in the application do not relate to the system, and the system described in the application has richer structure and wider application scenes.
In patent CN111469699A, "optical storage and charging device and control method thereof", a optical storage and charging device and control method are proposed, in which the photovoltaic system is connected to the dc side of the whole system, and in this patent, the photovoltaic system is connected to the ac side of the whole system, compared with the scheme described in the following patent, the requirements on the dc bus side of the battery are more relaxed, and in addition, when the dc bus fails, the photovoltaic energy storage system does not receive interference; meanwhile, the electric vehicle discharging system, the battery replacement system and the matching method among the systems are not involved, the system is richer in composition, and the application scene is wider.
A light storage and charging micro-grid system is provided in patent CN212588096U, which is a light storage and charging micro-grid system, and is characterized in that switching between direct-current networking and alternating-current networking is realized by switching connection modes of a grid-connected and off-grid switching unit, a power grid and a load, so that normal operation of related functions of light storage and charging under the conditions of power grid outage and abnormal fluctuation is coped with; the photovoltaic power generation, energy storage system and the automobile charging pile are integrated, and the whole topological structure is single; however, the electric vehicle discharging system, the battery replacement system and the matching method among the systems are not related, and the system is richer in composition and wider in application scene.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the problems in the prior art and provides a light storage charging and discharging battery replacing system and a system matching method.
The functional module subregion that this application relates to is more abundant, except containing existing photovoltaic power generation, lithium electricity energy storage, electric motor car charging system, has still integrateed and has traded power station, electric motor car discharging system and interchange charging system. The functional modules enrich functional partitions in terms of user introduction scene requirements, can meet the use requirements of users such as direct-current rapid power supplement, alternating-current slow power supplement, 3-minute rapid power change and surplus power online profit, are more diverse and flexible in energy scheduling, and the energy management module formulates a reasonable energy management strategy by balancing information such as power utilization load, power grid load, photovoltaic power generation capacity and vehicle feed state so as to achieve the purposes of economy optimization and reduction of power grid load.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
In order to solve the technical problems, the invention adopts the following technical scheme:
a light storage charging and discharging battery changing system comprises a photovoltaic power generation system, a lithium battery energy storage system, a direct-current bidirectional charging and discharging system, an alternating-current charging system and a battery changing system;
the photovoltaic power generation system comprises a photovoltaic module and a photovoltaic inverter, wherein the photovoltaic module converts solar energy into direct current electric energy and inputs the direct current electric energy into the photovoltaic inverter, and the photovoltaic inverter converts the direct current electric energy into alternating current electric energy and inputs the alternating current electric energy into the grid-connected cabinet;
the lithium battery energy storage system comprises an energy storage converter, a battery cluster, a battery management system and a related fire-fighting and air-conditioning system;
the energy storage converter carries out bidirectional conversion on the alternating current at the side of the power grid and the direct current at the side of the energy storage to realize the electric energy transmission between the energy storage battery and the power grid;
the battery cluster is formed by connecting a battery module and a high-voltage protection box in series and is used for storing electric energy;
the battery management system monitors key parameters of temperature, current and voltage of the battery cell in real time, ensures that the temperature and voltage of the battery cell operate in a safe range, isolates a fault battery cell in time and ensures the safety of the system;
the direct-current bidirectional charging and discharging system comprises a charging host control unit, a direct-current charging and discharging bidirectional DC/DC module and a direct-current charging and discharging terminal;
the charging host control unit is used for realizing communication interaction between the vehicle machines and monitoring and controlling the whole charging and discharging process;
the direct current charging and discharging bidirectional DC/DC module regulates the output voltage to be higher than the voltage of a vehicle end under the working condition of charging the electric vehicle, and regulates the output voltage to be higher than the voltage of the energy storage battery under the working condition of discharging the electric vehicle, so as to charge the energy storage system;
and the direct current charging and discharging terminal is connected with the vehicle through a standard interface to perform charging and discharging operations.
"DC/DC" refers to a DC to DC converter.
The alternating current charging system comprises a charger and a charging gun; the charger is used for carrying out safety monitoring and charging information detection on the whole alternating current charging process; the charging gun is connected with the electric vehicle through a standard interface for charging;
the power conversion station system is used as an independent power load and is connected into the grid-connected cabinet to realize the switching control of the energy source.
Furthermore, the high-voltage protection box is provided with an independent control device, a fuse and an obvious power-off device, so that the electrical safety of the battery is ensured.
A matching method of a light storage charging and discharging battery system comprises the following steps: the method comprises a direct current charging and discharging bidirectional DC/DC module matching method, an energy storage converter matching method, a photovoltaic module and photovoltaic inverter matching method and a high-voltage transformer equipment matching method.
Further, the direct current charging and discharging bidirectional DC/DC module matching method comprises the following steps:
the key parameter in the model selection of the direct current charging and discharging bidirectional DC/DC module is rated power PDCDC DC bus side voltage VFemale The output voltage V is measured by the batteryout ；
Rated power PDCDC Can meet the corresponding DC charging and discharging load requirement, namely PDCDC ＝PDC-1 +PDC-2 +…+PDC-N1 ；
PDC-1 、PDC-2 、PDC-N1 Rated power is respectively provided for each direct current charging and discharging pile;
side voltage V of DC busFemale The voltage working range is determined according to the voltage range of the selected energy storage battery cluster and the output voltage range of the PCS direct current side, and the specific matching principle is as follows:
if VFemale Has a voltage working range of (V)Mother L -VMother H ) The output voltage range of the energy storage battery cluster is (V)bat-L -Vbat-H ) PCS DC side output Voltage Range (V)DC-L -VDC-H ) Then V isMother L <Min(Vbat-L ,VDC-L )；VMother H >Max(Vbat-H ,VDC-H )
Output voltage range V measured by batteryout Should ensure a voltage platform, i.e. V, covering the battery of the electric vehicleout-L <VVehicle with a detachable front cover <Vout-H 。
Further, the energy storage converter matching method comprises the following steps:
the key parameter in the selection of the energy storage converter module is the rated output power P of the alternating current sideAC-PCS Rated output voltage V of AC sideAC-out Rated output frequency F of AC sideAC DC side rated output power PDC-PCS DC side rated output voltage VDC-PCS ；
The rated output power of the alternating current side can meet the full-load electricity utilization working condition of the electricity exchanging station and the alternating current charging pile, namely PAC-PCS1 +PAC-PCS2 >PBattery changing station +PTotal power of ac charging ；
The rated output voltage of the AC side is to be AC to the power gridThe voltage value and the frequency are kept close, namely the rated output voltage V of the alternating current sideAC-out =400V, rated output frequency F of the ac sideAC ＝50Hz；
Rated output power P at DC sideDC-PCS ＝PDC-PCS1 +PDC-PCS2 PCS1 is used for driving a direct-current bidirectional charging and discharging pile load and charging a plurality of energy storage battery clusters, then PDC-PCS1 >Max(PDCDC /ηDCDC ，EPCS1 *C)；
PCS is an abbreviation for energy storage converter;
wherein etaDCDC For DC/DC module efficiency, EPCS1 The total electric quantity of a battery cluster connected under the energy storage converter PCS1 is C, and the charging multiplying power required by a user is C; the PCS2 DC side is only used to charge the connected battery cluster, so PDC-PCS1 >EPCS1 * C; rated output voltage of the direct current sides of the energy storage converters PCS1 and PCS2 is a range value, and the range of the rated output voltage is required to cover the voltage value of the energy storage battery cluster, namely VDC-PCS-L <Vbat-L And V isbat-L-H <VDC-PCS-H 。
Further, the photovoltaic module and the photovoltaic inverter matching method comprises the following steps:
the key parameter in the photovoltaic module matching is the peak power P of a single photovoltaic panelsingle Peak voltage Vsingle Peak current Isingle The number n of the single photovoltaic panels;
the key parameter in the photovoltaic inverter matching is the rated output power P of the photovoltaic inverterDCAC Maximum input voltage Vmax Maximum input current Imax ；
The matching relationship among the key parameters is as follows:
PDCAC >n*Psingle *1.1,；Vmax >n*Vsingle ；Imax >n*Isingle
wherein 1.1 is a suggested safety factor, Psingle And n is selected and converted according to the photovoltaic power requirement of a specific implementation project through the product specification of the existing photovoltaic module, wherein Vsingle And Isingle Is the physics of different types of photovoltaic modulesAn attribute.
Further, the high-voltage transformer equipment matching method comprises the following steps:
the high-voltage transformer equipment serves the whole system and does not belong to a part of an optical storage charging and discharging power conversion system, but the equipment parameters of the high-voltage transformer equipment are matched in practical projects.
The key parameter in the high-voltage transformer matching is the capacity SThe high pressure is applied to the mixture of the water and the air, the power consumption of the whole system can be satisfied, namely SHigh pressure ≥1.25(PBattery replacement station +PPCS1 +PPCS2 +PTotal power of ac charging +PAuxiliary power supply ) kVA, where 1.25 is the power conversion empirical factor.
Compared with the prior art, the invention has the beneficial effects that:
1) A photovoltaic power generation system is introduced to develop green clean energy.
2) The energy storage system is introduced, so that the user-side distributed energy access capability can be improved, the disaster and policy electricity limiting capability can be met, and the power supply reliability can be ensured;
3) The peak clipping and valley filling are carried out, the peak load regulation of the power grid is participated, the power load during the peak load of the national power grid is reduced, and meanwhile, the power demand in the time period with higher power price is transferred to the time period with lower power price for realization, so that the whole power consumption cost is reduced on the premise of not changing the power consumption behavior;
4) An electric vehicle charging and replacing system is integrated, a new energy vehicle matching power supplementing facility is perfected, and electric vehicle development is promoted;
5) The direct-current discharge system of the electric vehicle is innovatively introduced, the micro energy storage property of the electric vehicle is excavated, and the profit mode of 'valley-charge peak-discharge' of an electric vehicle user is expanded by means of V2G technical development and related policies.
Drawings
The invention is further described with reference to the accompanying drawings in which:
fig. 1 is a schematic diagram of a light storage charging and discharging power conversion system according to the present invention.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.
The invention is described in detail below with reference to the attached drawing figures:
the invention provides a light storage, charging, discharging and switching integrated comprehensive system, which is characterized in that a photovoltaic power generation system, a lithium battery energy storage system, an electric vehicle charging system, a discharging system and a switching system are reasonably matched in terms of reducing power grid load and meeting diversified power supplementing scene requirements of users, so that an electricity supplementing ecological system integrating multidimensional advantages of green energy, peak clipping and valley filling, quick charging and discharging, intelligent switching and the like is formed, power matching and type selection methods of the systems are explained in terms of matching among the systems, and reference is provided for design and development of a subsequent integrated system.
The system comprises the following components:
referring to fig. 1, the invention provides a light storage, charging, discharging and battery changing integrated system and a key equipment type selection matching method in each system, wherein the light storage, charging, discharging and battery changing integrated system comprises a photovoltaic power generation system, a lithium battery energy storage system, a direct-current bidirectional charging and discharging system, an alternating-current charging system and a battery changing system.
The photovoltaic power generation system comprises a photovoltaic module and a photovoltaic inverter, wherein the photovoltaic module converts solar energy into direct current electric energy and inputs the direct current electric energy into the photovoltaic inverter (DC/AC), the photovoltaic inverter converts the direct current electric energy into alternating current electric energy and inputs the alternating current electric energy into a grid-connected cabinet, and the energy trend is subject to the scheduling of the whole system.
The lithium battery energy storage system comprises an energy storage converter (PCS), a battery cluster, a battery management system and a fire-fighting and air-conditioning system. The energy storage converter can perform bidirectional conversion on the alternating current on the side of the power grid and the direct current on the side of the energy storage, so that the electric energy transmission between the energy storage battery and the power grid is realized; the battery cluster is formed by connecting a plurality of battery modules in series with a high-voltage protection box and is used for storing electric energy, wherein the high-voltage protection box is provided with an independent control device, a fuse and an obvious power-off device, so that the electrical safety of the battery is ensured; the battery management system monitors key parameters such as temperature, current and voltage of the battery cell in real time, ensures that the temperature and the voltage of the battery cell operate in a safe range, and isolates a fault battery cell in time to ensure the safety of the system.
The direct-current bidirectional charging and discharging system comprises a charging host control unit, a host bidirectional DC/DC module and a direct-current charging and discharging terminal. The charging host control unit is used for realizing communication interaction between the vehicle machines and monitoring and controlling the whole charging and discharging process; the host bidirectional DCDC module regulates the output voltage to be higher than the voltage of a vehicle end under the working condition of charging the electric vehicle, and regulates the output voltage to be higher than the voltage of an energy storage battery under the working condition of discharging the electric vehicle, so as to charge an energy storage system; and the direct current charging and discharging terminal is connected with the vehicle through a standard interface to perform charging and discharging operations.
The alternating current charging system comprises a charger and a charging gun, the charger is used for carrying out safety monitoring and charging information detection on the whole alternating current charging process, the charging gun is connected with the electric vehicle through a standard interface for charging, and the alternating current charging system is suitable for user scenes with low requirements on charging speed due to the fact that alternating current charging power is smaller than direct current charging power.
The power conversion station system is used as an independent power load and can realize switching control of the energy source by being connected into the grid-connected cabinet, so that an optimal power utilization strategy is realized.
The matching method of the key equipment of the light storage charge-discharge switching system comprises the following steps:
the model selection matching method among the more key devices in the whole optical storage charging and discharging switching system is introduced, the topological structure scheme in the figure is taken as an example to illustrate parameter matching among systems, and the method can be adjusted according to the increase and decrease of the load of the functional partition in different embodiments in the specific implementation process.
The direct current charging and discharging bidirectional DC/DC module matching method comprises the following steps:
the key parameter in the selection of the direct current charging and discharging bidirectional DC/DC module is rated power PDCDC DC bus side voltage VFemale The output voltage V is measured by the batteryout 。
Wherein the rated power PDCDC Can meet the corresponding DC charging and discharging load requirement, namely PDCDC ＝PDC-1 +PDC-2 +…+PDC-N1 (PDC-1 、PDC-2 、PDC-N1 Rated power of each direct current charging and discharging pile respectively);
wherein the voltage V on the DC bus sideFemale The voltage working range is determined according to the voltage range of the selected energy storage battery cluster and the output voltage range of the PCS direct current side, and the specific matching principle is as follows:
if VFemale Has a voltage working range of (V)Mother L -VMother H ) The output voltage range of the energy storage battery cluster is (V)bat-L -Vbat-H ) Output voltage range (V) of PCS DC sideDC-L -VDC-H ) Then V isMother L <Min(Vbat-L ,VDC-L )；VMother H >Max(Vbat-H ,VDC-H )
The output voltage range Vout measured by the battery is ensured to cover the voltage platform of the battery of the electric vehicle, namely Vout-L <VVehicle with wheels <Vout-H 。
Energy storage converter (PCS) matching method:
the key parameter in the model selection of the energy storage converter (PCS) module is the rated output power P of the alternating current sideAC-PCS Rated output voltage V of AC sideAC-out Rated output frequency F of AC sideAC Rated output power P of DC sideDC-PCS Rated output voltage V of DC sideDC-PCS 。
Wherein the output power of the alternating current side can meet the full-load electricity utilization working condition of the electricity exchanging station and the alternating current charging pile, namely PAC-PCS1 +PAC-PCS2 >PBattery changing station +PTotal power of ac charging (ii) a In order to ensure the consistency of the AC power supply of the electric load, the AC rated output voltage should be kept close to the AC voltage value and frequency of the power grid, namely the AC side rated output voltage VAC-out =400V, rated output frequency F of the ac sideAC ＝50Hz；
Wherein the rated output power P of the DC sideDC-PCS ＝PDC-PCS1 +PDC-PCS2 According to the topological scheme, the PCS1 is used for driving the direct-current bidirectional charging and discharging pile load and a plurality of energy storage battery clusters to be charged, and then P isDC-PCS1 >Max(PDCDC /ηDCDC ，EPCS1 * C) Wherein etaDCDC For DC/DC module efficiency, EPCS1 The total electric quantity of a battery cluster connected under the energy storage converter PCS1 is C, and the charging multiplying power required by a user is C; the PCS2 DC side is only used to charge the connected battery cluster, so PDC-PCS1 >EPCS1 * C; rated output voltage of the direct current sides of the energy storage converters PCS1 and PCS2 is a range value, and the range of the rated output voltage is required to cover the voltage value of the energy storage battery cluster, namely VDC-PCS-L <Vbat-L And V isbat-L-H <VDC-PCS-H 。
The photovoltaic module and photovoltaic inverter matching method comprises the following steps:
the key parameter in the photovoltaic module matching is the peak power P of a single photovoltaic panelsingle Peak voltage Vsingle Peak current Isingle The number n of the single photovoltaic panels, and the rated output power P of the photovoltaic inverter as a key parameter in the matching of the photovoltaic invertersDCAC Maximum input voltage Vmax Maximum input current Imax Matching between key parametersThe relationship is as follows:
PDCAC >n*Psingle *1.1,；Vmax >n*Vsingle ；Imax >n*Isingle
wherein 1.1 is a suggested safety factor, Psingle And n is selected and converted according to the photovoltaic power requirement of a specific implementation project through the product specification of the existing photovoltaic module, wherein Vsingle And Isingle Is a physical property of different types of photovoltaic modules
The high-voltage transformer equipment matching method comprises the following steps:
the key parameter in the high-voltage transformer matching is the capacity SThe high pressure is applied to the mixture of the water and the air, the power consumption of the whole system can be satisfied, namely SHigh pressure ≥1.25(PBattery changing station +PPCS1 +PPCS2 +PTotal power of ac charging +PAuxiliary power supply ) kVA, where 1.25 is the power conversion empirical factor.
The invention relates to a comprehensive electric vehicle electricity supplementing ecology integrating a photovoltaic power generation system, a lithium battery energy storage system, a direct current and alternating current charging system, a direct current discharging system and a battery replacement system;
the designed topology scheme among the systems and the energy flow scheme among the systems have innovation;
the method for matching the selection of each key device in the light storage, charge and discharge integrated system is innovative.
The above description is only for the purpose of illustrating the embodiments of the present invention, and the scope of the present invention should not be limited thereto, and any modifications, equivalents and improvements made by those skilled in the art within the technical scope of the present invention as disclosed in the present invention should be covered by the scope of the present invention. And those not described in detail in this specification are well within the skill of the art.
Claims (7)
1. A light stores and fills and trades the electric system, characterized by that: the system comprises a photovoltaic power generation system, a lithium battery energy storage system, a direct-current bidirectional charging and discharging system, an alternating-current charging system and a battery replacement system;
the photovoltaic power generation system comprises a photovoltaic module and a photovoltaic inverter, wherein the photovoltaic module converts solar energy into direct current electric energy and inputs the direct current electric energy into the photovoltaic inverter, and the photovoltaic inverter converts the direct current electric energy into alternating current electric energy and inputs the alternating current electric energy into the grid-connected cabinet;
the lithium battery energy storage system comprises an energy storage converter, a battery cluster and a battery management system;
the energy storage converter carries out bidirectional conversion on the alternating current at the side of the power grid and the direct current at the side of the energy storage to realize the electric energy transmission between the energy storage battery and the power grid;
the battery cluster is formed by connecting a battery module and a high-voltage protection box in series and is used for storing electric energy;
the battery management system monitors key parameters of temperature, current and voltage of the battery cell in real time, ensures that the temperature and voltage of the battery cell operate in a safe range, isolates a fault battery cell in time and ensures the safety of the system;
the direct-current bidirectional charging and discharging system comprises a charging host control unit, a direct-current charging and discharging bidirectional DC/DC module and a direct-current charging and discharging terminal;
the charging host control unit is used for realizing communication interaction between the vehicle machines and monitoring and controlling the whole charging and discharging process;
the direct current charging and discharging bidirectional DC/DC module regulates the output voltage to be higher than the voltage of a vehicle end under the working condition of charging the electric vehicle, and regulates the output voltage to be higher than the voltage of the energy storage battery under the working condition of discharging the electric vehicle, so as to charge the energy storage system;
and the direct current charging and discharging terminal is connected with the vehicle through a standard interface to perform charging and discharging operations.
The alternating current charging system comprises a charger and a charging gun; the charger is used for carrying out safety monitoring and charging information detection on the whole alternating current charging process; the charging gun is connected with the electric vehicle through a standard interface for charging;
the power conversion station system is used as an independent power load and is connected into the grid-connected cabinet to realize the switching control of the energy source.
2. The optical storage charging and discharging power conversion system according to claim 1, wherein:
the high-voltage protection box is provided with an independent control device, a fuse and an obvious power-off device, so that the electrical safety of the battery is ensured.
3. A matching method of a light storage charging and discharging system is characterized in that:
the method comprises the following steps: the method comprises a direct-current charging and discharging bidirectional DC/DC module matching method, an energy storage converter matching method, a photovoltaic module and photovoltaic inverter matching method and a high-voltage transformer equipment matching method.
4. The matching method of the optical storage charging and discharging power system according to claim 3, wherein:
the direct current charging and discharging bidirectional DC/DC module matching method comprises the following steps:
the key parameter in the model selection of the direct current charging and discharging bidirectional DC/DC module is rated power PDCDC DC bus side voltage VFemale The output voltage V is measured by the batteryout ；
Rated power PDCDC Can meet the corresponding DC charging and discharging load requirement, PDCDC ＝PDC-1 +PDC-2 +…+PDC-N1 ；
PDC-1 、PDC-2 、PDC-N1 Rated power of each direct current charging and discharging pile is respectively set;
side voltage V of DC busFemale The voltage working range is determined according to the voltage range of the selected energy storage battery cluster and the output voltage range of the PCS direct current side, and the specific matching principle is as follows:
if VFemale Has a voltage operating range of (V)Mother L -VMother H ) The output voltage range of the energy storage battery cluster is (V)bat-L -Vbat-H ) Output voltage range (V) of PCS DC sideDC-L -VDC-H ) Then V isMother L <Min(Vbat-L ,VDC-L )；VMother H >Max(Vbat-H ,VDC-H )
Output voltage range V is measured to batteryout Should ensure a voltage level covering the battery of the electric vehiclePlatform, namely Vout-L <VVehicle with wheels <Vout-H 。
5. The matching method of the optical storage charging and discharging system according to claim 3, wherein:
the energy storage converter matching method comprises the following steps:
the key parameter in the selection of the energy storage converter module is the rated output power P of the alternating current sideAC-PCS Rated output voltage V of AC sideAC-out Ac side rated output frequency FAC Rated output power P of DC sideDC-PCS DC side rated output voltage VDC-PCS ；
Rated output power of the alternating current side can meet the full-load electricity utilization working condition of the electricity exchanging station and the alternating current charging pile, namely PAC-PCS1 +PAC-PCS2 >PBattery changing station +PTotal power of ac charging ；
The rated output voltage of the alternating current side is close to the alternating current voltage value and the frequency of a power grid, namely the rated output voltage V of the alternating current sideAC-out =400V, rated output frequency F of the ac sideAC ＝50Hz；
Rated output power P at DC sideDC-PCS ＝PDC-PCS1 +PDC-PCS2 The PCS1 is used for driving a direct-current bidirectional charging and discharging pile load and charging a plurality of energy storage battery clusters, and then P isDC-PCS1 >Max(PDCDC /ηDCDC ，EPCS1 *C)；
Wherein etaDCDC For DC/DC module efficiency, EPCS1 The total electric quantity of a battery cluster connected under the energy storage converter PCS1 is C, and the charging multiplying power required by a user is C; the PCS2 DC side is only used to charge the connected battery cluster, so PDC-PCS1 >EPCS1 * C; rated output voltage of the direct current sides of the energy storage converters PCS1 and PCS2 is a range value, and the range of the rated output voltage is required to cover the voltage value of the energy storage battery cluster, namely VDC-PCS-L <Vbat-L And V isbat-L-H <VDC-PCS-H 。
6. The matching method of the optical storage charging and discharging power system according to claim 3, wherein:
the photovoltaic module and the photovoltaic inverter matching method comprises the following steps:
the key parameter in the photovoltaic module matching is the peak power P of a single photovoltaic panelsingle Peak voltage Vsingle Peak current Isingle The number n of the single photovoltaic panels;
the key parameter in the photovoltaic inverter matching is the rated output power P of the photovoltaic inverterDCAC Maximum input voltage Vmax Maximum input current Imax ；
The matching relationship among the key parameters is as follows:
PDCAC >n*Psingle *1.1,；Vmax >n*Vsingle ；Imax >n*Isingle
wherein 1.1 is a suggested safety factor, Psingle And n is selected and converted according to the photovoltaic power requirement of a specific implementation project through the product specification of the existing photovoltaic module, wherein Vsingle And Isingle Is a physical property of different types of photovoltaic modules.
7. The matching method of the optical storage charging and discharging power system according to claim 3, wherein:
the high-voltage transformer equipment matching method comprises the following steps:
the key parameter in the high-voltage transformer matching is the capacity SThe high pressure is applied to the mixture of the water and the air, the power consumption of the whole system can be satisfied, namely SHigh pressure ≥1.25(PBattery changing station +PPCS1 +PPCS2 +PTotal power of ac charging +PAuxiliary power supply ) kVA, where 1.25 is the power conversion empirical coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210963813.5ACN115441486A (en) | 2022-08-11 | 2022-08-11 | Light storage charging and discharging battery replacing system and system matching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210963813.5ACN115441486A (en) | 2022-08-11 | 2022-08-11 | Light storage charging and discharging battery replacing system and system matching method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115441486Atrue CN115441486A (en) | 2022-12-06 |
Family
ID=84242089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210963813.5APendingCN115441486A (en) | 2022-08-11 | 2022-08-11 | Light storage charging and discharging battery replacing system and system matching method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115441486A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116706972A (en)* | 2023-07-06 | 2023-09-05 | 江苏鸿博电力新能源有限公司 | Photovoltaic energy storage system and energy storage method thereof |
| CN116826931A (en)* | 2023-08-29 | 2023-09-29 | 成都特隆美储能技术有限公司 | A circuit connection method for improving the efficiency of the power loop of energy storage battery clusters |
| CN119401626A (en)* | 2025-01-06 | 2025-02-07 | 交通运输部科学研究院 | Intelligent regulation and control method for photovoltaic components in battery swap stations |
| CN120073945A (en)* | 2025-02-27 | 2025-05-30 | 明光恒辉能源科技有限公司 | Photovoltaic energy storage management system and method based on cloud computing |
- 2022
- 2022-08-11CNCN202210963813.5Apatent/CN115441486A/enactivePending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116706972A (en)* | 2023-07-06 | 2023-09-05 | 江苏鸿博电力新能源有限公司 | Photovoltaic energy storage system and energy storage method thereof |
| CN116826931A (en)* | 2023-08-29 | 2023-09-29 | 成都特隆美储能技术有限公司 | A circuit connection method for improving the efficiency of the power loop of energy storage battery clusters |
| CN119401626A (en)* | 2025-01-06 | 2025-02-07 | 交通运输部科学研究院 | Intelligent regulation and control method for photovoltaic components in battery swap stations |
| CN120073945A (en)* | 2025-02-27 | 2025-05-30 | 明光恒辉能源科技有限公司 | Photovoltaic energy storage management system and method based on cloud computing |
| CN120073945B (en)* | 2025-02-27 | 2025-09-12 | 明光恒辉能源科技有限公司 | Photovoltaic energy storage management system and method based on cloud computing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211790784U (en) | Light stores up and fills integration charging station | |
| Rituraj et al. | A comprehensive review on off-grid and hybrid charging systems for electric vehicles | |
| CN102510089B (en) | Wind-solar storage micro-grid system | |
| CN103606943B (en) | A kind of microgrid Ni-MH battery energy storage system | |
| CN115441486A (en) | Light storage charging and discharging battery replacing system and system matching method | |
| CN205429725U (en) | Many generating lines residential block power supply system based on little electric wire netting of direct current | |
| CN106505615A (en) | A power supply system for electric vehicle charging station based on independent microgrid | |
| CN103457514B (en) | Dual-mode solar photovoltaic power generation system | |
| CN110061515B (en) | Energy storage monitoring device applied to zinc-iron flow battery of photovoltaic power generation field | |
| CN105811458A (en) | Microgrid energy storage system and energy management method thereof | |
| CN105305495A (en) | Dispatching method for multi-energy complement micro-grid system | |
| CN115224704B (en) | Time-sharing multiplexing peak regulation and frequency modulation power station constructed based on hybrid energy storage and control method | |
| CN112994059A (en) | Station network interactive type optical storage and charging intelligent charging station control architecture and control method | |
| CN111293777A (en) | Uninterrupted power supply system and method for multi-station fusion in power operation | |
| CN107681700B (en) | Method for converting operation modes of alternating current-direct current hybrid micro-grid | |
| CN115352311A (en) | An energy management method for an optical storage charging and discharging system | |
| CN111231713A (en) | Electric automobile charging and discharging system and control method | |
| CN116454961A (en) | Layered decentralized control method and system for direct current transformer area flexible interconnection | |
| CN204668970U (en) | Microgrid control system | |
| CN112491083B (en) | Micro-grid structure based on fuel cell and operation control method | |
| CN212543374U (en) | Direct-current power supply system for 110kV intelligent energy station | |
| CN117595223B (en) | A power distribution system based on AC/DC microgrid | |
| CN117375042B (en) | Photovoltaic power station AC/DC side hybrid energy storage device and differential configuration method | |
| CN118763676A (en) | A distribution network terminal voltage regulation system suitable for electric vehicle charging | |
| CN112510768A (en) | Power supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | Country or region after:China Address after:130012 no.4888, Yushan Road, Changchun high tech Development Zone, Jilin Province Applicant after:FAW Besturn Automotive Co.,Ltd. Address before:No. 4888, Yushan Road, Changchun high tech Industrial Development Zone, Changchun City, Jilin Province Applicant before:FAW Pentium Car Co.,Ltd. Country or region before:China | |
| CB02 | Change of applicant information |