CN209948769U - Flexible charging system of electric automobile - Google Patents
Flexible charging system of electric automobile Download PDFInfo
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- CN209948769U CN209948769U CN201920691066.8U CN201920691066U CN209948769U CN 209948769 U CN209948769 U CN 209948769U CN 201920691066 U CN201920691066 U CN 201920691066U CN 209948769 U CN209948769 U CN 209948769U
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Abstract
The utility model discloses an electric automobile's flexible charging system, be connected to the A line of electric wire netting, B line, C line and the circuit breaker of N line, power supply unit, direct current contactor, be used for connecting the positive terminal that charges and the negative pole end that charges of rifle, the cross-over connection has a control circuit between A1 line and N1 line, and this control circuit is connected with power supply unit's control end for control power supply unit opens and stops, the chronogenesis and the size of power supply unit output voltage electric current that charge, it has a detection device still to cross-over connection between positive bus and the negative pole bus, detection device further includes the power, with relay, voltage sampler and the control unit of power series connection, the control unit is according to the voltage value who comes from voltage sampler, the break-make of control relay. The utility model discloses a hierarchical adjustable of voltage during the power supply to be applicable to different types of car and charge, still guaranteed the dynamic monitoring among the charging process, thereby guarantee the security of charging, stability and the precision of charging.
Description
Technical Field
The utility model relates to an electric automobile charging device, in particular to electric automobile's flexible charging system belongs to the electric automobile field of charging.
Background
The automobile industry is the second largest industry in the world, which is second to petrochemical industry, at present, most automobiles use gasoline and diesel oil as fuels, not only a large amount of petroleum resources are consumed, but also nitrogen oxides, hydrocarbons, carbon monoxide and the like contained in automobile exhaust cause serious pollution to the atmosphere. In order to maintain the sustainable development of national economy, protect human living environment and guarantee energy supply, governments of various countries in the world invest a great deal of manpower and material resources to find various ways for solving the problems.
Because the battery of the electric automobile is a voltage source, the charger is another voltage for charging the battery, and 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 utility model aims at providing an electric automobile's flexible charging system, this electric automobile's flexible charging system voltage when having realized the power supply hierarchical adjustable to be applicable to different types of car and charge, still guaranteed the dynamic monitoring in the charging process, thereby guarantee the security of charging, stability and the precision of charging.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a flexible charging system of an electric automobile comprises a circuit breaker, a power supply device, a direct current contactor, a charging positive terminal and a charging negative terminal, 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 power supply device comprises a plurality of power supply modules which are connected in parallel, wherein the positive output end of each power supply module is connected with a positive bus, the negative output end of each power supply module is connected with a negative 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, the direct current output module is connected with a capacitor in parallel, and a reverse diode is connected between the positive end of the direct current output module and the positive bus;
a control loop is connected between the A1 line and the N1 line in a crossing manner, the control loop is connected with a control end of the power supply device and is used for controlling the starting and stopping of the power supply device, the charging time sequence and the magnitude of voltage and current output by the power supply device, a voltage sampling unit and a current sampling unit are connected between the positive electrode bus and the negative electrode bus in a crossing manner, 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 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 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 controls 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 scheme, the lightning arrester also comprises four lightning arresters, one ends of the four lightning arresters are sequentially connected to the A1 line, the B1 line, the C1 line and the N1 line, and the other ends of the four lightning arresters are all grounded.
2. In the above scheme, a front-end sampling module is installed between the power supply device and the dc contactor, and the front-end sampling module is bridged between the positive bus and the negative bus.
3. In the scheme, a rear end sampling module is arranged between the direct current contactor and the charging gun, and the rear end sampling module is bridged between the positive bus and the negative bus.
Because of the application of the technical scheme, compared with the prior art, the utility model have following advantage and effect:
1. the utility model discloses flexible charging system of electric automobile, it adopts the mode that a plurality of power module connect in parallel as power supply unit, has realized the hierarchical adjustable of voltage when supplying power to be applicable to the car charging of different types; in addition, a reverse diode is connected between the positive end of the direct current output module and the positive bus, and the reverse diode is arranged, so that the reverse charging or the impact current can be effectively prevented from being generated, and the circuit is protected; in addition, the charger is also provided with four lightning arresters, one ends of the four lightning arresters are sequentially connected to the A1 line, the B1 line, the C1 line and the N1 line, the other ends of the four lightning arresters are all grounded, and the arrangement of the lightning arresters can prevent surge to a limited extent and ensure the safety of the charger; in addition, a front end sampling module is installed between a power supply device and the direct current contactor, the front end sampling module is bridged between the positive bus and the negative bus, a rear end sampling module is installed between the direct current contactor and the charging gun, the rear end sampling module is bridged between the positive bus and the negative bus, the front end sampling module and the rear end sampling module of the direct current contactor are arranged to sample current voltage in front of and behind the direct current contactor, when the direct current contactor is closed, the voltage in the front end is lower than the voltage in the rear end, damage to an automobile battery caused by hedging current is avoided, and charging stability and charging safety are guaranteed.
2. The utility model discloses electric automobile's flexible charging system, it has a control circuit to stride between A1 line and N1 line, and this control circuit is connected with power supply unit's control end for control power supply unit opens and stops, the chronogenesis of charging and the size of power supply unit output voltage electric current, it has a voltage sampling unit and a current sampling unit to stride between anodal bus and the negative pole bus, control circuit is according to the voltage and the current value that come from voltage sampling unit and current sampling unit, control power supply unit, and the combination setting of electric current, voltage sampling unit and control circuit makes control circuit according to electric current, the voltage value that samples in real time, adjusts the control to power supply unit, guarantees the dynamic monitoring in the charging process, thereby guarantees the security of charging, stability and the precision of charging; in addition, a detection device is connected between the positive electrode bus and the negative electrode bus in a bridging manner, the detection device is positioned between the power supply device and the 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 used for controlling the on-off of the relay, the voltage sampler is used for collecting the voltage value between the positive electrode bus and the negative electrode bus, the control unit controls the on-off of the relay according to the voltage value from the voltage sampler, the detection device is arranged, when the charger charges, the power supply device is charged reversely and detects the voltage of the power supply device, so that whether a reverse diode of a power module of the power supply device is damaged or not is judged, if the reverse diode is damaged, the charging is stopped for fault elimination, and the condition that the capacitor of the power supply module is directly connected with an automobile battery in parallel, the safety and the stability of charging the automobile are ensured.
Drawings
Fig. 1 is a schematic structural diagram of a flexible charging system of an electric vehicle according to the present invention;
fig. 2 is the utility model discloses power supply unit schematic structure among electric automobile's flexible charging system.
In the above drawings: 1. a circuit breaker; 2. a power supply device; 3. a DC contactor; 4. charging the positive terminal; 5. charging the negative terminal; 6. line A1; 7. line B1; 8. line C1; 9. a line N1; 10. a positive electrode bus; 11. a negative bus; 12. a power supply module; 101. an alternating current input module; 102. an AC/DC conversion module; 103. a DC output module; 104. a capacitor; 105. a reverse diode; 13. a lightning arrester; 16. a front-end sampling module; 17. a back-end sampling module; 18. a control loop; 19. a voltage sampling unit; 20. a current sampling unit; 21. a detection device; 22. a power source; 23. a relay; 24. a voltage sampler; 25. a control unit.
Detailed Description
The invention will be further described with reference to the following examples:
example 1: a flexible charging system of an electric automobile comprises a circuit breaker 1, a power supply device 2, a direct current contactor 3, a charging positive terminal 4 and a charging negative 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 charging positive terminal 4 and the charging negative terminal 5 are used for being connected with a charging gun, 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 output end of the power supply device 2 is connected with the charging positive terminal 4 through a positive bus 10, a negative output end of the power supply device 2 is connected with the charging negative terminal 5 through a negative bus 11, and the positive bus;
the power supply device 2 comprises a plurality of power supply modules 12 connected in parallel, wherein 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 positioned between the alternating current input module 101 and the direct current output module 103, the direct current output module 103 is connected with a capacitor 104 in parallel, and a backward diode 105 is connected between the positive electrode end of the direct current output module 103 and the positive electrode bus 10;
a control loop 18 is connected between the a1 line 6 and the N1 line 9 in a crossing manner, the control loop 18 is connected with a control end of the power supply device 2 and is used for controlling the start-stop and charging time sequence of the power supply device 2 and the magnitude of the voltage and current output by the power supply device 2, a voltage sampling unit 19 and a current sampling unit 20 are connected between the positive electrode bus 10 and the negative electrode bus 11 in a crossing 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;
a detection device 21 is further connected between the positive bus and the negative bus in a bridging manner, 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 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 controls the on-off of the relay 23 according to the voltage value from the voltage sampler 24.
There are also four arresters 13, one ends of the four arresters 13 are connected to the above-mentioned a1 line 6, B1 line 7, C1 line 8 and N1 line 9 in this order, and the other ends of the above-mentioned arresters 13 are all grounded.
Example 2: a flexible charging system of an electric automobile comprises a circuit breaker 1, a power supply device 2, a direct current contactor 3, a charging positive terminal 4 and a charging negative 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 charging positive terminal 4 and the charging negative terminal 5 are used for being connected with a charging gun, 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 output end of the power supply device 2 is connected with the charging positive terminal 4 through a positive bus 10, a negative output end of the power supply device 2 is connected with the charging negative terminal 5 through a negative bus 11, and the positive bus;
the power supply device 2 comprises a plurality of power supply modules 12 connected in parallel, wherein 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 positioned between the alternating current input module 101 and the direct current output module 103, the direct current output module 103 is connected with a capacitor 104 in parallel, and a backward diode 105 is connected between the positive electrode end of the direct current output module 103 and the positive electrode bus 10;
a control loop 18 is connected between the a1 line 6 and the N1 line 9 in a crossing manner, the control loop 18 is connected with a control end of the power supply device 2 and is used for controlling the start-stop and charging time sequence of the power supply device 2 and the magnitude of the voltage and current output by the power supply device 2, a voltage sampling unit 19 and a current sampling unit 20 are connected between the positive electrode bus 10 and the negative electrode bus 11 in a crossing 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;
a detection device 21 is further connected between the positive bus and the negative bus in a bridging manner, 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 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 controls the on-off of the relay 23 according to the voltage value from the voltage sampler 24.
A front end sampling module 16 is arranged between the power supply device 2 and the direct current contactor 3, and the front end sampling module 16 is bridged between the positive electrode bus 10 and the negative electrode bus 11; a rear end sampling module 17 is installed between the direct current contactor 3 and the charging gun, and the rear end sampling module 17 is bridged between the positive bus 10 and the negative bus 11.
When the flexible charging system of the electric automobile is adopted, the mode that a plurality of power modules are connected in parallel to form a power supply device is adopted, so that the voltage can be regulated in a grading manner during power supply, and the flexible charging system is suitable for charging different types of automobiles; in addition, the reverse diode can effectively prevent the generation of reverse charging or impact current and protect the circuit; in addition, the lightning arrester can prevent surge to a limited extent, and the safety of the charger is ensured; in addition, the front and rear end sampling modules of the direct current contactor are arranged to sample the front and rear current voltages of the direct current contactor, when the direct current contactor is closed, the voltage at the front end is lower than the voltage at the rear end, the damage of the opposite current to the automobile battery is avoided, and the charging stability and safety are ensured;
in addition, the current and voltage sampling units 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 the dynamic monitoring in the charging process is ensured, thereby ensuring the charging safety, stability and charging precision; in addition, the detection device is arranged to reversely charge the power supply device and detect the voltage of the power supply device when the charger charges, so that whether a reverse diode of a power supply module of the power supply device is damaged or not is judged, if the reverse diode is damaged, the charging is stopped for troubleshooting, the condition that the capacitor of the power supply module is directly connected with the automobile battery in parallel to cause overlarge impact current to cause fault is avoided, and the safety and the stability of automobile charging are ensured.
The working flow of the detection device is as follows:
when the charger is charged, 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 a bus of the charger power supply device, meanwhile, the voltage sampler detects output voltage, when the voltage reaches a set voltage, the control unit controls the relay to be disconnected, at the moment, the voltage sampler detects bus voltage of a charger power supply module, if the bus voltage is more than half of the set voltage, the fact that a capacitor is reversely charged indicates that the reverse diode is damaged, and the fact that a system power supply module fails is prompted, otherwise, the system is normal and normal charging can be carried out.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (4)
1. The utility model provides an electric automobile's flexible charging system which characterized in that: the charging device comprises a circuit breaker (1) with one end connected to an A line, a B line, a C line and an N line of a power grid, a power supply device (2), a direct current contactor (3), a charging positive end (4) used for being connected with a charging gun and a charging negative end (5), wherein 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), the 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), the positive output end of the power supply device (2) is connected with the charging positive end (4) through a positive bus (10), the negative output end of the power supply device (2) is connected with the charging negative end (5) through a negative bus (11), and the positive bus (10) and the negative bus (11) are both provided with the direct current contactor (3);
the power supply device (2) comprises a plurality of power supply modules (12) which are connected in parallel, 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), each 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 in parallel on the direct current output module (103), and a reverse diode (105) is connected between the positive end of the direct current output module (103) and the positive bus (10);
a control loop (18) is connected between the A1 line (6) and the N1 line (9) in a crossing mode, the control loop (18) is connected with a control end of the power supply device (2) and used for controlling starting and stopping of the power supply device (2), charging time sequence and the magnitude of voltage and current output by the power supply device (2), a voltage sampling unit (19) and a current sampling unit (20) are connected between the positive electrode bus (10) and the negative electrode bus (11) in a crossing mode, 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 direct current contactor is characterized in that a detection device (21) is connected between the positive electrode bus and the negative electrode 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 the on-off of the relay (23), the voltage sampler (24) is used for collecting a voltage value between the positive electrode bus (10) and the negative electrode bus (11), and the control unit (25) controls the on-off of the relay (23) according to the voltage value from the voltage sampler (24).
2. The flexible charging system for electric vehicles according to claim 1, characterized in that: and four arresters (13), wherein one ends of the four arresters (13) are sequentially connected to the A1 line (6), the B1 line (7), the C1 line (8) and the N1 line (9), and the other ends of the arresters (13) are grounded.
3. The flexible charging system for electric vehicles according to claim 1, characterized in that: a front-end sampling module (16) is installed between the power supply device (2) and the direct current contactor (3), and the front-end sampling module (16) is bridged between the positive bus (10) and the negative bus (11).
4. The flexible charging system for electric vehicles according to claim 1 or 3, characterized in that: a rear end sampling module (17) is installed between the direct current contactor (3) and the charging gun, and the rear end sampling module (17) is bridged between the positive bus (10) and the negative bus (11).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920691066.8U CN209948769U (en) | 2019-05-15 | 2019-05-15 | Flexible charging system of electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920691066.8U CN209948769U (en) | 2019-05-15 | 2019-05-15 | Flexible charging system of electric automobile |
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| CN209948769U true CN209948769U (en) | 2020-01-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113733952A (en) * | 2021-10-10 | 2021-12-03 | 数源科技股份有限公司 | Multifunctional flexible charging pile charging terminal circuit system |
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2019
- 2019-05-15 CN CN201920691066.8U patent/CN209948769U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113733952A (en) * | 2021-10-10 | 2021-12-03 | 数源科技股份有限公司 | Multifunctional flexible charging pile charging terminal circuit system |
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