CN112186829A - Mobile energy storage shelter power supply system and control method - Google Patents
Mobile energy storage shelter power supply system and control method Download PDFInfo
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- CN112186829A CN112186829A CN202010862010.1A CN202010862010A CN112186829A CN 112186829 A CN112186829 A CN 112186829A CN 202010862010 A CN202010862010 A CN 202010862010A CN 112186829 A CN112186829 A CN 112186829A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 21
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- 230000000087 stabilizing effect Effects 0.000 claims description 11
- 239000000178 monomer Substances 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 230000003111 delayed effect Effects 0.000 claims description 3
- 230000010354 integration Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 238000004134 energy conservation Methods 0.000 description 1
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- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- 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
- B60L53/10—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 characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
- B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- 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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/40—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries adapted for charging from various sources, e.g. AC, DC or multivoltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a mobile energy storage shelter power supply system and a control method, wherein a battery is connected with the direct current side of a PCS energy storage converter through a direct current contactor KM1, the alternating current side of the PCS energy storage converter is connected with the input side of an alternating current bus through a contactor KM2, and the output side of the alternating current bus is connected with an alternating current charging socket, a direct current charging pile and an alternating current power supply socket; the input side of the direct current air switch Q2 is connected with a battery, and the output side of the DC/DC switch power supply is respectively connected with the power supply input ends of a BMS battery management system and a control system through a diode D1; the output side of the AC/DC switching power supply is respectively connected with the power input ends of the BMS battery management system and the control system through a diode D2. The invention can effectively reduce the integration cost of the power supply of the mobile energy storage shelter under the condition of improving the space utilization rate. The starting control and the redundant power supply of the mobile energy storage shelter under various conditions can be effectively guaranteed, and the reliability of the system is improved.
Description
Technical Field
The invention relates to a mobile energy storage shelter power supply system and a control method, and belongs to the technical field of mobile power supplies.
Background
The environmental pollution is aggravated, the requirements on energy conservation and emission reduction and power supply reliability are further improved, the personalized requirements of users are increased, a clean, flexible and reliable power supply mode is urgently needed to replace the traditional fuel oil power generation, and mobile energy storage is generated at the right moment. However, no matter the mobile energy storage vehicle or the energy storage container is, the size of the container is often larger, and the temporary power supply scene with small power demand and small power demand in power utilization places such as narrow places and limited heights cannot be met, and is particularly reflected in construction sites such as rural power, logistics, environmental protection, electric power infrastructure, base station inspection, 5G transformation, petrochemical pipeline welding and the like.
Disclosure of Invention
The purpose is as follows: the conventional mobile energy storage power supply generally uses a UPS (uninterrupted power supply) as a starting power supply, and has the defects of high loss, inconvenience in operation, lack of redundant power supply and the like for a small energy storage power supply system; in order to overcome the defects in the prior art, enhance the power supply reliability of the mobile energy storage shelter power supply and improve the use convenience of the mobile energy storage shelter power supply, the invention provides a mobile energy storage shelter power supply system and a control method.
The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a mobile energy storage shelter power system comprising: the circuit is started to the secondary, primary system includes: the battery is connected with the direct current side of the PCS energy storage converter through a direct current contactor KM1, the alternating current side of the PCS energy storage converter is connected with the input side of an alternating current bus through a contactor KM2, and the output side of the alternating current bus is connected with an alternating current charging socket and/or a direct current charging pile and/or an alternating current power supply socket;
the secondary start-up circuit includes: the input side of a direct current air switch Q2 is connected with a battery, the output side of a direct current air switch Q2 is connected with the input side of a direct current air switch Q1, the output side of a direct current air switch Q1 is connected with the input side of a DC/DC switching power supply, and the output side of the DC/DC switching power supply is respectively connected with the power input ends of a BMS battery management system and a control system through a diode D1; the input side of the AC/DC switching power supply is connected with the input side of the alternating current bus, and the output side of the AC/DC switching power supply is respectively connected with the power input ends of the BMS battery management system and the control system through a diode D2; and the control system is respectively communicated with the BMS battery management system, the control panel, the PCS energy storage converter and the direct current charging pile.
Preferably, the direct current charging system is further included, the output end of the direct current contactor KM1 is further connected with the direct current charging system, and the BMS battery management system is communicated with the direct current charging system.
Preferably, the input voltage range of the DC/DC switching power supply is 200VDC-1000VDC, and the output voltage is 23.5 VDC.
Preferably, the input voltage of the AC/DC switching power supply is three-phase 400V alternating current voltage, and the output voltage is 24 VDC.
As a preferred scheme, the control system is respectively communicated with the BMS battery management system, the control screen, the PCS energy storage converter and the direct current charging pile through RS 485.
Preferably, the BMS communicates with the dc charging system using a CAN.
A control method of a mobile energy storage shelter power supply system comprises the following steps:
step 1-1: the DC/DC switch power supply normally works and outputs direct-current voltage in a voltage stabilizing way by switching on the direct-current air switch Q2 and the direct-current air switch Q1;
step 1-2: the BMS battery management system and the control system are powered on and work normally;
step 1-3: the BMS battery management system carries out self-checking, and the detection content at least comprises one of the information of the voltage of a battery monomer, the temperature of the monomer, the pressure difference, the temperature difference, the total pressure and the PCS communication state;
step 1-4: the BMS battery management system judges whether the battery state is normal through self-checking, then the step 1-5 is carried out, the contactor KM1 is immediately cut off when the battery state is judged to be abnormal, an alarm signal is sent out at the same time, and a tripping signal is sent out after time t is delayed to disconnect the direct-current air switch Q2;
step 1-5: the BMS battery management system controls the contactor KM1 to pull in;
step 1-6: and the BMS battery management system judges whether an external charging gun is inserted into the direct current charging system, if so, the BMS battery management system requests charging voltage and charging current for the external charging gun, and charges the battery pack in a direct current charging mode, and if not, the step 1-7 is carried out.
Step 1-7: the control system judges the input and output states and the internal state of the current PCS energy storage converter, if the current state is normal, the step 1-8 is carried out, and if the current state is abnormal, the contactor KM2 is immediately cut off, and meanwhile an alarm signal is sent out;
step 1-8: judging whether the alternating current bus is normal or not, if so, enabling the AC/DC switching power supply to work normally and output direct current voltage in a voltage stabilizing manner, and performing redundant power supply on a BMS battery management system and a control system;
step 1-9: the control system controls the PCS energy storage converter to enter a starting-up flow and switch into a charging operation mode, and an external alternating current power supply charges the battery through the PCS energy storage converter through an alternating current charging socket;
step 1-10: and after charging is completed, the BMS battery management system sends a full charging instruction to an external charging gun or a PCS energy storage converter, and the system is shut down.
Preferably, the method further comprises the following steps:
step 2-1: the DC/DC switch power supply normally works and outputs direct-current voltage in a voltage stabilizing way by switching on the direct-current air switch Q2 and the direct-current air switch Q1;
step 2-2: the BMS battery management system and the control system are powered on and work normally;
step 2-3: the BMS battery management system carries out self-checking, and the detection content at least comprises one of the information of the voltage of a battery monomer, the temperature of the monomer, the pressure difference, the temperature difference, the total pressure and the PCS communication state;
step 2-4: the BMS battery management system judges that the battery state is normal through self-checking, then the step 2-5 is carried out, and when the battery state is abnormal, the contactor KM1 is immediately cut off and a tripping signal is sent out to enable the direct current air switch Q2 to be tripped;
step 2-5: the BMS battery management system controls the contactor KM1 to pull in;
step 2-6: the control system judges the input and output states and the internal state of the current PCS energy storage converter, if the current state is normal, the step 2-7 is carried out, and if the current state is abnormal, the contactor KM2 is immediately cut off and an alarm signal is sent out;
step 2-7: the control system issues a starting-up instruction, the PCS energy storage converter enters a starting-up process and shifts to a V/F control state, and the alternating current bus outputs AC400V to the outside to the direct current charging pile or AV400V/AC220V to the alternating current power supply socket;
step 2-8: judging whether the voltage of the alternating current bus is normal or not, if the voltage of the alternating current bus is normal, turning to the step 2-9, and if the voltage of the alternating current bus is not normal, controlling the PCS energy storage converter to protect the PCS energy storage converter to stop and sending an alarm signal by a control system;
step 2-9: judging whether the electric quantity of the battery is sufficient, if so, normally outputting power supply by the direct current charging pile and/or the alternating current power supply socket, and turning to the step 2-10, if not, issuing a release prohibition signal by the BMS battery management system, and stopping outputting power supply to the outside by the system;
step 2-10: the AC/DC switching power supply is electrified to normally work and outputs direct-current voltage in a voltage stabilizing way, and redundant power supply is carried out on the battery BMS management system and the control system;
step 2-11: detecting whether a charging gun on the direct current charging pile is inserted into an external vehicle or not, if so, issuing a starting instruction to the direct current charging pile by a control system, and outputting a voltage of 200-750V for charging by the direct current charging pile according to a request of a vehicle-mounted BMS management system of the external vehicle; if not, the operation is not carried out;
step 2-12: and after the power supply is finished, the control system issues a shutdown instruction, and the system is shut down.
Has the advantages that: the mobile energy storage shelter power supply system and the control method provided by the invention are improved and optimized aiming at the topological structure and the secondary circuit structure of the mobile energy storage shelter system, and the control logic and the control method are redesigned. Compared with the prior art, the beneficial effects are as follows:
1) in the invention, no matter in the charging mode or the power supply mode, the power supply system of the mobile energy storage shelter can be automatically started without an external power supply, so that the use of equipment such as UPS (uninterrupted power supply) in the power supply of the mobile energy storage shelter is reduced, and the integration cost of the power supply of the mobile energy storage shelter can be effectively reduced under the condition of improving the space utilization rate.
2) In the invention, various control modes such as alternating current/direct current charging, alternating current/direct current power supply and the like are designed and explained, so that the starting control and the redundant power supply of the mobile energy storage shelter power supply under various conditions can be effectively ensured, and the reliability of the system is improved.
Drawings
FIG. 1 is a circuit structure diagram of a power control system of a mobile energy storage shelter of the invention;
FIG. 2 is a flow chart of a method for controlling a charging mode of a power supply of a mobile energy storage shelter according to the present invention;
fig. 3 is a flow chart of a power supply mode control method of the mobile energy storage shelter power supply of the invention.
Detailed Description
The present invention will be further described with reference to the following examples.
Fig. 1 shows in detail an electrical structure adopted by a power supply system of the invention, and the power supply system of the mobile energy storage shelter comprises a primary system and a secondary starting circuit, wherein the primary system comprises: the battery 1 is connected with the direct current side of the PCS energy storage converter 3 through a direct current contactor KM1, the output end of the direct current contactor KM1 is also connected with a direct current charging system 8, the alternating current side of the PCS energy storage converter 3 is connected with the input side of an alternating current bus through a contactor KM2, and the output side of the alternating current bus is connected with an alternating current charging socket 6 and/or a direct current charging pile 7 and/or an alternating current power supply socket 11;
the secondary start-up circuit includes: the input side of a direct current air switch Q2 is connected with a battery 1, the output side of a direct current air switch Q2 is connected with the input side of a direct current air switch Q1, the output side of a direct current air switch Q1 is connected with the input side of a DC/DC switching power supply 9, and the output side of the DC/DC switching power supply 9 is respectively connected with the power input ends of a BMS battery management system and a control system through a diode D1; the input side of the AC/DC switching power supply is connected with the input side of the alternating current bus, and the output side of the AC/DC switching power supply is respectively connected with the power input ends of the BMS battery management system and the control system through a diode D2; the control system 4 is respectively communicated with the BMS battery management system 2, the control screen 5, the PCS energy storage converter 3 and the direct current charging pile 7 through RS 485; the BMS battery management system 2 communicates with the dc charging system 8 using the CAN.
The input voltage range of the DC/DC switching power supply is 200VDC-1000VDC, the input voltage of the AC/DC switching power supply is three-phase 400V alternating current voltage, the output voltages of the two switching power supplies are 23.5VDC and 24VDC respectively, the AC/DC switching power supply is used as a starting power supply during grid-connected starting, the DC/DC switching power supply is used as a starting power supply during off-grid starting, and redundancy is achieved during normal operation and working of the system and mutual backup function is achieved.
Fig. 2 shows the following detailed control method for the charging mode of the power supply of the mobile energy storage shelter, which comprises the following specific steps:
step 1-1: under the charging mode of the battery, firstly, the direct current air switch Q2 and the direct current air switch Q1 are switched on, and the DC/DC switching power supply works normally and outputs 23.5VDC direct current voltage in a voltage stabilizing way;
step 1-2: the BMS battery management system and the control system are powered on and work normally;
step 1-3: the BMS battery management system carries out self-checking, and the detection content comprises information of single battery voltage, single temperature, differential pressure, temperature difference, total pressure, PCS communication state and the like;
step 1-4: the BMS battery management system judges whether the battery state is normal through self-checking, then the step 1-5 is carried out, the contactor KM1 is immediately cut off and an alarm signal is sent out when the battery state is abnormal, a tripping signal is sent out after t time is delayed, and the direct current air switch Q2 is switched off, if t =10 s;
step 1-5: the BMS battery management system controls the contactor KM1 to pull in;
step 1-6: and the BMS battery management system judges whether an external charging gun is inserted into the direct current charging system, if so, the BMS battery management system requests charging voltage and charging current for the external charging gun, and charges the battery pack in a direct current charging mode, and if not, the step 1-7 is carried out.
Step 1-7: the control system judges the input and output states and the internal state of the current PCS energy storage converter, if the current state is normal, the step 1-8 is carried out, and if the current state is abnormal, the contactor KM2 is immediately cut off, and meanwhile an alarm signal is sent out;
step 1-8: judging whether the alternating current bus is normal or not, if so, enabling the AC/DC switching power supply to work normally and output 24VDC direct current voltage in a voltage stabilizing manner, and performing redundant power supply on a BMS battery management system and a control system;
step 1-9: the control system controls the PCS energy storage converter to enter a starting-up flow and switch into a charging operation mode, and an external alternating current power supply charges the battery through the PCS energy storage converter through an alternating current charging socket;
step 1-10: and after charging is completed, the BMS battery management system sends a full charging instruction to an external charging gun or a PCS energy storage converter, and the system is shut down.
Fig. 3 shows the following method for controlling the power supply mode of the mobile energy storage shelter power supply in detail, and the specific process is as follows:
step 2-1: under the power supply mode of an alternating current power supply socket and/or a direct current charging pile, firstly, a direct current air switch Q2 and a direct current air switch Q1 are switched on, and a DC/DC switching power supply normally works and stably outputs 23.5VDC direct current voltage;
step 2-2: the BMS battery management system and the control system are powered on and work normally;
step 2-3: the BMS battery management system carries out self-checking, and the detection content comprises information of single battery voltage, single temperature, differential pressure, temperature difference, total pressure, PCS communication state and the like;
step 2-4: the BMS battery management system judges that the battery state is normal through self-checking, then the step 2-5 is carried out, and when the battery state is abnormal, the contactor KM1 is immediately cut off and a tripping signal is sent out to enable the direct current air switch Q2 to be tripped;
step 2-5: the BMS battery management system controls the contactor KM1 to pull in;
step 2-6: the control system judges the input and output states and the internal state of the current PCS energy storage converter, if the current state is normal, the step 2-7 is carried out, and if the current state is abnormal, the contactor KM2 is immediately cut off and an alarm signal is sent out;
step 2-7: the control system issues a starting-up instruction, the PCS energy storage converter enters a starting-up process and shifts to a V/F control state, and the alternating current bus outputs AC400V to the outside to the direct current charging pile or AC400V/AC220V to the alternating current power supply socket;
step 2-8: judging whether the voltage of the alternating current bus is normal or not, if the voltage of the alternating current bus is normal, turning to the step 2-9, and if the voltage of the alternating current bus is not normal, controlling the PCS energy storage converter to protect the PCS energy storage converter to stop and sending an alarm signal by a control system;
step 2-9: judging whether the electric quantity of the battery is sufficient, if so, normally outputting power supply by the direct current charging pile and/or the alternating current power supply socket, and turning to the step 2-10, if not, issuing a release prohibition signal by the BMS battery management system, and stopping outputting power supply to the outside by the system;
step 2-10: the AC/DC switching power supply is electrified to work normally and outputs 24VDC direct-current voltage in a voltage stabilizing way, and redundant power supply is carried out on the battery BMS management system and the control system.
Step 2-11: detecting whether a charging gun on the direct current charging pile is inserted into an external vehicle or not, if so, issuing a starting instruction to the direct current charging pile by a control system, and outputting a voltage of 200-750V for charging by the direct current charging pile according to a request of a vehicle-mounted BMS management system of the external vehicle; if not, the operation is not carried out;
step 2-12: and after the power supply is finished, the control system issues a shutdown instruction, and the system is shut down.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (8)
1. A mobile energy storage shelter power system comprising: primary system, secondary start circuit, its characterized in that: the primary system comprises: the battery is connected with the direct current side of the PCS energy storage converter through a direct current contactor KM1, the alternating current side of the PCS energy storage converter is connected with the input side of an alternating current bus through a contactor KM2, and the output side of the alternating current bus is connected with an alternating current charging socket and/or a direct current charging pile and/or an alternating current power supply socket;
the secondary start-up circuit includes: the input side of a direct current air switch Q2 is connected with a battery, the output side of a direct current air switch Q2 is connected with the input side of a direct current air switch Q1, the output side of a direct current air switch Q1 is connected with the input side of a DC/DC switching power supply, and the output side of the DC/DC switching power supply is respectively connected with the power input ends of a BMS battery management system and a control system through a diode D1; the input side of the AC/DC switching power supply is connected with the input side of the alternating current bus, and the output side of the AC/DC switching power supply is respectively connected with the power input ends of the BMS battery management system and the control system through a diode D2; and the control system is respectively communicated with the BMS battery management system, the control panel, the PCS energy storage converter and the direct current charging pile.
2. The mobile energy storage shelter power system of claim 1, wherein: the direct current charging system is further included, the output end of the direct current contactor KM1 is further connected with the direct current charging system, and communication is carried out between the BMS battery management system and the direct current charging system.
3. The mobile energy storage shelter power system of claim 1, wherein: the input voltage range of the DC/DC switching power supply is 200VDC-1000VDC, and the output is 23.5 VDC.
4. The mobile energy storage shelter power system and control method of claim 1, wherein: the input voltage of the AC/DC switching power supply is three-phase 400V alternating-current voltage, and the output voltage is 24 VDC.
5. The mobile energy storage shelter power system of claim 1, wherein: and the control system is respectively communicated with the BMS battery management system, the control screen, the PCS energy storage converter and the direct current charging pile by RS 485.
6. The mobile energy storage shelter power system of claim 2, wherein: and the BMS battery management system and the direct current charging system are communicated by adopting a CAN.
7. The control method of a mobile energy storage shelter power system as claimed in any one of claims 1 to 6, wherein: the method comprises the following steps:
step 1-1: the DC/DC switch power supply normally works and outputs direct-current voltage in a voltage stabilizing way by switching on the direct-current air switch Q2 and the direct-current air switch Q1;
step 1-2: the BMS battery management system and the control system are powered on and work normally;
step 1-3: the BMS battery management system carries out self-checking, and the detection content at least comprises one of the information of the voltage of a battery monomer, the temperature of the monomer, the pressure difference, the temperature difference, the total pressure and the PCS communication state;
step 1-4: the BMS battery management system judges whether the battery state is normal through self-checking, then the step 1-5 is carried out, the contactor KM1 is immediately cut off when the battery state is judged to be abnormal, an alarm signal is sent out at the same time, and a tripping signal is sent out after time t is delayed to disconnect the direct-current air switch Q2;
step 1-5: the BMS battery management system controls the contactor KM1 to pull in;
step 1-6: the BMS battery management system judges whether an external charging gun is inserted into the direct current charging system, if so, the BMS battery management system requests charging voltage and charging current for the external charging gun, the battery pack is charged in a direct current charging mode, and if not, the step 1-7 is carried out;
step 1-7: the control system judges the input and output states and the internal state of the current PCS energy storage converter, if the current state is normal, the step 1-8 is carried out, and if the current state is abnormal, the contactor KM2 is immediately cut off, and meanwhile an alarm signal is sent out;
step 1-8: judging whether the alternating current bus is normal or not, if so, enabling the AC/DC switching power supply to work normally and output direct current voltage in a voltage stabilizing manner, and performing redundant power supply on a BMS battery management system and a control system;
step 1-9: the control system controls the PCS energy storage converter to enter a starting-up flow and switch into a charging operation mode, and an external alternating current power supply charges the battery through the PCS energy storage converter through an alternating current charging socket; (ii) a
Step 1-10: and after charging is completed, the BMS battery management system sends a full charging instruction to an external charging gun or a PCS energy storage converter, and the system is shut down.
8. The control method according to claim 7, characterized in that: also comprises the following steps:
step 2-1: the DC/DC switch power supply normally works and outputs direct-current voltage in a voltage stabilizing way by switching on the direct-current air switch Q2 and the direct-current air switch Q1;
step 2-2: the BMS battery management system and the control system are powered on and work normally;
step 2-3: the BMS battery management system carries out self-checking, and the detection content at least comprises one of the information of the voltage of a battery monomer, the temperature of the monomer, the pressure difference, the temperature difference, the total pressure and the PCS communication state;
step 2-4: the BMS battery management system judges that the battery state is normal through self-checking, then the step 2-5 is carried out, and when the battery state is abnormal, the contactor KM1 is immediately cut off and a tripping signal is sent out to enable the direct current air switch Q2 to be tripped;
step 2-5: the BMS battery management system controls the contactor KM1 to pull in;
step 2-6: the control system judges the input and output states and the internal state of the current PCS energy storage converter, if the current state is normal, the step 2-7 is carried out, and if the current state is abnormal, the contactor KM2 is immediately cut off and an alarm signal is sent out;
step 2-7: the control system issues a starting-up instruction, the PCS energy storage converter enters a starting-up process and shifts to a V/F control state, and the alternating current bus outputs AC400V to the outside to the direct current charging pile or AC400V/AC220V to the alternating current power supply socket;
step 2-8: judging whether the voltage of the alternating current bus is normal or not, if the voltage of the alternating current bus is normal, turning to the step 2-9, and if the voltage of the alternating current bus is not normal, controlling the PCS energy storage converter to protect the PCS energy storage converter to stop and sending an alarm signal by a control system;
step 2-9: judging whether the electric quantity of the battery is sufficient, if so, normally outputting power supply by the direct current charging pile and/or the alternating current power supply socket, and turning to the step 2-10, if not, issuing a release prohibition signal by the BMS battery management system, and stopping outputting power supply to the outside by the system;
step 2-10: the AC/DC switching power supply is electrified to normally work and outputs direct-current voltage in a voltage stabilizing way, and redundant power supply is carried out on the battery BMS management system and the control system;
step 2-11: detecting whether a charging gun on the direct current charging pile is inserted into an external vehicle or not, if so, issuing a starting instruction to the direct current charging pile by a control system, and outputting a voltage of 200-750V for charging by the direct current charging pile according to a request of a vehicle-mounted BMS management system of the external vehicle; if not, the operation is not carried out;
step 2-12: and after the power supply is finished, the control system issues a shutdown instruction, and the system is shut down.
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