CN110481379B - Stable intelligent charger - Google Patents
Stable intelligent charger Download PDFInfo
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- CN110481379B CN110481379B CN201910401547.5A CN201910401547A CN110481379B CN 110481379 B CN110481379 B CN 110481379B CN 201910401547 A CN201910401547 A CN 201910401547A CN 110481379 B CN110481379 B CN 110481379B
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- 238000005070 sampling Methods 0.000 claims abstract description 28
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
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- 238000000034 method Methods 0.000 description 2
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- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Classifications
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
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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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/40—Electric propulsion with power supplied within the vehicle using propulsion power supplied by capacitors
-
- 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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
-
- 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
- B60L53/66—Data transfer between charging stations and vehicles
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
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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
- 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
- Y02T90/12—Electric charging stations
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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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a stable intelligent charger which comprises a circuit breaker, a power supply device, a direct current contactor, a charging positive electrode end and a charging negative electrode end, wherein the charging positive electrode end and the charging negative electrode end are used for being connected with a charging gun, an alternating current ammeter is respectively arranged on an A1 line, a B1 line and a C1 line, a direct current ammeter is arranged on a negative electrode bus between the charging negative electrode end and the direct current contactor, a control loop is connected between the A1 line and the N1 line in a bridging manner, the control loop controls the power supply device according to voltage and current values from a voltage sampling unit and a current sampling unit, a detection device is connected between the positive electrode bus and the negative electrode bus in a bridging manner, the detection device further comprises a power supply, a relay connected in series with the power supply, a voltage sampling unit and a control unit, and the control unit controls the on-off of the relay according to a voltage value from the voltage sampling unit. The invention avoids the situation that the capacitor of the power supply module is directly connected with the automobile battery in parallel to cause overlarge impact current to cause faults, and ensures the safety and stability of automobile charging.
Description
Technical Field
The invention relates to an electric automobile charging device, in particular to a stable intelligent charger, and belongs to the field of electric automobile charging.
Background
The automobile industry is the second largest industry in the world next to petrochemical industry, and most automobiles use gasoline and diesel oil as fuel at present, so that a large amount of petroleum resources are consumed, and nitrogen oxides, hydrocarbon, carbon monoxide and the like contained in automobile tail gas cause serious pollution to the atmosphere. In order to keep sustainable development of national economy, protect human living environment and guarantee energy supply, various ways for solving the problems are sought by various governments worldwide for a great deal of manpower and material resources.
Because the battery of the electric automobile is a voltage source, the charger is another voltage for charging the battery, and the two different voltage sources are not directly connected together, so that the phenomenon of short circuit or overcurrent caused by different voltages is avoided.
Disclosure of Invention
The invention aims to provide a stable intelligent charger, which avoids the situation that the capacitor of a power supply module is directly connected with a vehicle battery in parallel to cause overlarge impact current to cause faults, and ensures the safety and stability of charging the vehicle.
In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides a stable intelligent charger, includes that one end is connected to the circuit breaker of line A, line B, C and N of electric wire netting, power supply unit, DC contactor, is used for connecting the positive terminal and the negative terminal that charges of charging gun, the other end of circuit breaker is connected with A1 line, B1 line, C1 line and N1 line correspondingly, power supply unit's alternating current input is connected to A1 line, B1 line and C1 line, and this power supply unit's positive pole output passes through positive bus connection with the positive terminal that charges, power supply unit's negative pole output passes through negative bus connection with the negative terminal that charges, all be provided with on positive bus and the negative bus DC contactor;
the power supply device comprises a plurality of power supply modules which are connected in parallel, wherein the positive electrode output end of each power supply module is connected with a positive electrode bus, the negative electrode output end of each power supply module is connected with a negative electrode bus, the power supply module further comprises an alternating current input module, a direct current output module and an AC/DC conversion module positioned between the alternating current input module and the direct current output module, a capacitor is connected in parallel on the direct current output module, and a reverse diode is connected between the positive electrode end of the direct current output module and the positive electrode bus;
an alternating current ammeter is respectively arranged on the A1 line, the B1 line and the C1 line, and a direct current ammeter is arranged on a negative bus between the charging negative terminal and the direct current contactor;
a control loop is connected between the A1 line and the N1 line in a bridging way and is connected with a control end of the power supply device and used for controlling the starting and stopping time sequence and the charging time sequence of the power supply device and the output voltage and current of the power supply device, a voltage sampling unit and a current sampling unit are connected between the positive bus and the negative bus in a bridging way, and the control loop controls the power supply device according to the voltage and current values from the voltage sampling unit and the current sampling unit;
the detection device is positioned between the power supply device and the direct current contactor, and further comprises a power supply, a relay connected in series with the power supply, a voltage sampler and a control unit, wherein the control unit is connected with a control end of the relay and used for controlling the on-off of the relay, the voltage sampler is used for collecting a voltage value between the positive bus and the negative bus, and the control unit is used for controlling the on-off of the relay according to the voltage value from the voltage sampler.
The further improved scheme in the technical scheme is as follows:
1. in the above scheme, the number of the plurality of parallel power supply modules is 8.
2. In the scheme, a melting core is arranged on the positive bus between the direct-current contactor and the charging positive terminal.
3. In the above scheme, the ac electric meter is used for charging the power supply bureau.
4. In the scheme, the direct current ammeter is used for charging a charging car owner.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages and effects:
1. the stable intelligent charger adopts a mode that a plurality of power modules are connected in parallel to form a power supply device, realizes the grading adjustment of voltage during power supply, and is suitable for charging different types of automobiles; in addition, a reverse diode is connected between the positive electrode end of the direct current output module and the positive electrode bus, and the reverse diode is arranged to effectively prevent reverse charging or impact current from generating and protect the circuit.
2. The stable intelligent charger is characterized in that an alternating current ammeter is respectively arranged on an A1 line, a B1 line and a C1 line, a direct current ammeter is arranged on a negative bus between a charging negative terminal and a direct current contactor, and the charging is respectively carried out for a power supply office and a user owner using the charger through the combined arrangement of the alternating current ammeter and the direct current ammeter, so that the accuracy and the precision of the respective charging of an alternating current power supply end and a direct current charging end are ensured; in addition, a control loop is bridged between the A1 line and the N1 line, the control loop is connected with the control end of the power supply device and is used for controlling the starting and stopping time sequence of the power supply device and the charging time sequence and the output voltage and current of the power supply device, a voltage sampling unit and a current sampling unit are bridged between the positive bus and the negative bus, the control loop controls the power supply device according to the voltage and current values from the voltage sampling unit and the current sampling unit, and the current and voltage sampling unit and the control loop are combined, so that the control loop adjusts the control of the power supply device according to the current and voltage values sampled in real time and ensures the dynamic monitoring in the charging process, and the charging safety, stability and charging precision are ensured.
3. The invention relates to a stable intelligent charger, which is characterized in that a detection device is connected between an anode bus and a cathode bus in a bridging way, the detection device is positioned between a power supply device and a direct current contactor, the detection device further comprises a power supply, a relay connected with the power supply in series, a voltage sampler and a control unit, the control unit is connected with the control end of the relay and is used for controlling the on-off of the relay, the voltage sampler is used for collecting the voltage value between the anode bus and the cathode bus, the control unit is used for controlling the on-off of the relay according to the voltage value from the voltage sampler, the detection device is arranged, when the charger is charged, the power supply device is charged reversely and the voltage of the power supply device is detected, so that whether a reverse diode of a power supply module of the power supply device is damaged or not is judged, if the power supply module is damaged, the charging is stopped, the situation that the impact current is overlarge and faults are caused by direct parallel connection of a capacitor of the power supply module and a vehicle battery is avoided, and the safety and stability of charging of the vehicle are ensured.
Drawings
FIG. 1 is a schematic diagram of a stable intelligent charger according to the present invention;
fig. 2 is a schematic diagram of a power supply device in the stable intelligent charger of the invention.
In the above figures: 1. a circuit breaker; 2. a power supply device; 3. a DC contactor; 4. a charging positive terminal; 5. a charge negative terminal; 6. a1 line; 7. b1 line; 8. a C1 line; 9. an N1 line; 10. an anode bus; 11. a negative bus; 12. a power module; 101. an alternating current input module; 102. an AC/DC conversion module; 103. a direct current output module; 104. a capacitor; 105. a reverse diode; 14. an alternating current ammeter; 15. a direct current ammeter; 18. a control loop; 19. a voltage sampling unit; 20. a current sampling unit; 21. a detection device; 22. a power supply; 23. a relay; 24. a voltage sampler; 25. and a control unit.
Detailed Description
The invention is further described below with reference to examples:
example 1: the stable intelligent charger comprises a circuit breaker 1, a power supply device 2, a direct current contactor 3, a charging positive electrode terminal 4 and a charging negative electrode terminal 5, wherein one end of the circuit breaker 1 is connected to an A line, a B line, a C line and an N line of a power grid, the other end of the circuit breaker 1 is correspondingly connected with an A1 line 6, a B1 line 7, a C1 line 8 and an N1 line 9, an alternating current input end of the power supply device 2 is connected to the A1 line 6, the B1 line 7 and the C1 line 8, a positive electrode output end of the power supply device 2 is connected with the charging positive electrode terminal 4 through a positive electrode bus 10, a negative electrode output end of the power supply device 2 is connected with the charging negative electrode terminal 5 through a negative electrode bus 11, and the direct current contactor 3 is arranged on the positive electrode bus 10 and the negative electrode bus 11;
the power supply device 2 comprises a plurality of power supply modules 12 connected in parallel, wherein the positive output end of each power supply module 12 is connected with a positive bus 10, the negative output end of each power supply module 12 is connected with a negative bus 11, the power supply module 12 further comprises an alternating current input module 101, a direct current output module 103 and an AC/DC conversion module 102 positioned between the alternating current input module 101 and the direct current output module 103, a capacitor 104 is connected on the direct current output module 103 in parallel, and a reverse diode 105 is connected between the positive end of the direct current output module 103 and the positive bus 10;
an alternating current ammeter 14 is respectively arranged on the A1 line 6, the B1 line 7 and the C1 line 8, and a direct current ammeter 15 is arranged on the negative electrode bus 11 between the charging negative electrode terminal 5 and the direct current contactor 3;
a control loop 18 is connected between the line A1 6 and the line N1 9 in a bridging manner, the control loop 18 is connected with a control end of the power supply device 2 and is used for controlling the starting and stopping time sequence of the power supply device 2 and the charging time sequence and the output voltage and current of the power supply device 2, a voltage sampling unit 19 and a current sampling unit 20 are connected between the positive bus 10 and the negative bus 11 in a bridging manner, and the control loop 18 controls the power supply device 2 according to the voltage and current values from the voltage sampling unit 19 and the current sampling unit 20;
the detection device 21 is positioned between the power supply device 2 and the direct current contactor 3, the detection device 21 further comprises a power supply 22, a relay 23 connected in series with the power supply 22, a voltage sampler 24 and a control unit 25, the control unit 25 is connected with a control end of the relay 23 and used for controlling the on-off of the relay 23, the voltage sampler 24 is used for collecting a voltage value between the positive bus 10 and the negative bus 11, and the control unit 25 is used for controlling the on-off of the relay 23 according to the voltage value from the voltage sampler 24.
The number of the power modules 12 connected in parallel is 8; a melting core is installed on the positive bus 10 between the dc contactor 3 and the charging positive terminal 4.
Example 2: the stable intelligent charger comprises a circuit breaker 1, a power supply device 2, a direct current contactor 3, a charging positive electrode terminal 4 and a charging negative electrode terminal 5, wherein one end of the circuit breaker 1 is connected to an A line, a B line, a C line and an N line of a power grid, the other end of the circuit breaker 1 is correspondingly connected with an A1 line 6, a B1 line 7, a C1 line 8 and an N1 line 9, an alternating current input end of the power supply device 2 is connected to the A1 line 6, the B1 line 7 and the C1 line 8, a positive electrode output end of the power supply device 2 is connected with the charging positive electrode terminal 4 through a positive electrode bus 10, a negative electrode output end of the power supply device 2 is connected with the charging negative electrode terminal 5 through a negative electrode bus 11, and the direct current contactor 3 is arranged on the positive electrode bus 10 and the negative electrode bus 11;
the power supply device 2 comprises a plurality of power supply modules 12 connected in parallel, wherein the positive output end of each power supply module 12 is connected with a positive bus 10, the negative output end of each power supply module 12 is connected with a negative bus 11, the power supply module 12 further comprises an alternating current input module 101, a direct current output module 103 and an AC/DC conversion module 102 positioned between the alternating current input module 101 and the direct current output module 103, a capacitor 104 is connected on the direct current output module 103 in parallel, and a reverse diode 105 is connected between the positive end of the direct current output module 103 and the positive bus 10;
an alternating current ammeter 14 is respectively arranged on the A1 line 6, the B1 line 7 and the C1 line 8, and a direct current ammeter 15 is arranged on the negative electrode bus 11 between the charging negative electrode terminal 5 and the direct current contactor 3;
a control loop 18 is connected between the line A1 6 and the line N1 9 in a bridging manner, the control loop 18 is connected with a control end of the power supply device 2 and is used for controlling the starting and stopping time sequence of the power supply device 2 and the charging time sequence and the output voltage and current of the power supply device 2, a voltage sampling unit 19 and a current sampling unit 20 are connected between the positive bus 10 and the negative bus 11 in a bridging manner, and the control loop 18 controls the power supply device 2 according to the voltage and current values from the voltage sampling unit 19 and the current sampling unit 20;
the detection device 21 is positioned between the power supply device 2 and the direct current contactor 3, the detection device 21 further comprises a power supply 22, a relay 23 connected in series with the power supply 22, a voltage sampler 24 and a control unit 25, the control unit 25 is connected with a control end of the relay 23 and used for controlling the on-off of the relay 23, the voltage sampler 24 is used for collecting a voltage value between the positive bus 10 and the negative bus 11, and the control unit 25 is used for controlling the on-off of the relay 23 according to the voltage value from the voltage sampler 24.
The ac meter 14 is used to charge the power supply office; the dc meter 15 is used to charge the charging car owner.
When the stable intelligent charger is adopted, a mode that a plurality of power modules are connected in parallel to form a power supply device is adopted, so that voltage grading can be adjusted during power supply, and the stable intelligent charger is suitable for charging of different types of automobiles; in addition, the reverse diode is arranged, so that reverse charging or impact current can be effectively prevented, and a circuit is protected;
in addition, through the combined arrangement of the alternating current ammeter and the direct current ammeter, the charging system is respectively used for charging a power supply office and a user car owner using a charger, and the accuracy and the precision of the charging of the alternating current power supply end and the charging of the direct current power supply end are ensured; in addition, the current and voltage sampling unit and the control loop are combined, so that the control loop adjusts the control of the power supply device according to the current and voltage values sampled in real time, and dynamic monitoring in the charging process is ensured, thereby ensuring the safety, stability and charging precision of charging;
in addition, the detection device is arranged, when the charger charges, the power supply device is reversely charged and the voltage is detected, so that whether the power supply module reverse diode of the power supply device is damaged or not is judged, if the power supply module reverse diode is damaged, the charging is stopped for fault detection, the situation that the impact current is overlarge and faults are generated due to the fact that the capacitor of the power supply module is directly connected with the automobile battery in parallel is avoided, and the safety and the stability of charging the automobile are ensured.
The working flow of the detection device is as follows:
when the charger charges, the detection device enters a detection program, firstly, the control unit controls the relay to be closed, the power supply of the detection device charges the bus of the power supply device of the charger, meanwhile, the voltage sampler detects output voltage, when the voltage reaches a set voltage, the control unit controls the relay to be opened, at the moment, the voltage sampler detects the bus voltage of the power supply module of the charger, if the bus voltage is greater than half of the set voltage, the capacitor is reversely charged, namely, the reverse diode is damaged, the system power supply module is prompted to fail, otherwise, the system is normal, and normal charging can be performed.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (1)
1. A stable intelligent charger is characterized in that: the direct-current charging device comprises a circuit breaker (1), a power supply device (2), a direct-current contactor (3) and a charging positive terminal (4) and a charging negative terminal (5), wherein one end of the circuit breaker is connected to an A line, a B line, a C line and an N line of a power grid, the other end of the circuit breaker (1) is correspondingly connected with an A1 line (6), a B1 line (7), a C1 line (8) and an N1 line (9), an alternating-current input end of the power supply device (2) is connected to the A1 line (6), the B1 line (7) and the C1 line (8), an anode output end of the power supply device (2) is connected with the charging positive terminal (4) through an anode bus (10), a cathode output end of the power supply device (2) is connected with the charging negative terminal (5) through a cathode bus (11), the direct-current contactor (3) is arranged on the anode bus (10) and the cathode bus (11), and a fuse core is arranged on the anode bus (10) between the direct-current contactor (3) and the charging positive terminal (4);
the power supply device (2) comprises 8 power supply modules (12) which are connected in parallel, the positive electrode output end of each power supply module (12) is connected with a positive electrode bus (10), the negative electrode output end of each power supply module (12) is connected with a negative electrode bus (11), the power supply module (12) further comprises an alternating current input module (101), a direct current output module (103) and an AC/DC conversion module (102) which is positioned between the alternating current input module (101) and the direct current output module (103), a capacitor (104) is connected on the direct current output module (103) in parallel, and a reverse diode (105) is connected between the positive electrode end of the direct current output module (103) and the positive electrode bus (10);
an alternating current ammeter (14) is respectively arranged on the A1 line (6), the B1 line (7) and the C1 line (8), a direct current ammeter (15) is arranged on a negative bus (11) between the charging negative terminal (5) and the direct current contactor (3), the alternating current ammeter (14) is used for charging a power supply bureau, and the direct current ammeter (15) is used for charging a charging car main;
a control loop (18) is bridged between the A1 line (6) and the N1 line (9), the control loop (18) is connected with a control end of the power supply device (2) and is used for controlling the starting and stopping time sequence of the power supply device (2) and the charging time sequence and the output voltage and current of the power supply device (2), a voltage sampling unit (19) and a current sampling unit (20) are bridged between the positive bus (10) and the negative bus (11), and the control loop (18) controls the power supply device (2) according to the voltage and current values from the voltage sampling unit (19) and the current sampling unit (20);
a detection device (21) is further connected between the positive bus and the negative bus in a bridging mode, the detection device (21) is located between the power supply device (2) and the direct current contactor (3), the detection device (21) further comprises a power supply (22), a relay (23) connected with the power supply (22) in series, a voltage sampler (24) and a control unit (25), the control unit (25) is connected with a control end of the relay (23) and used for controlling on-off of the relay (23), the voltage sampler (24) is used for collecting voltage values between the positive bus (10) and the negative bus (11), and the control unit (25) is used for controlling on-off of the relay (23) according to the voltage values from the voltage sampler (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910401547.5A CN110481379B (en) | 2019-05-15 | 2019-05-15 | Stable intelligent charger |
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