CN210212106U

CN210212106U - Electric vehicle charger

Info

Publication number: CN210212106U
Application number: CN201920690402.7U
Authority: CN
Inventors: Jian Ding; 丁剑; Yixue Sun; 孙义学; Lucheng Dai; 戴路成; Jiahu Huang; 黄加虎
Original assignee: SUZHOU INDUSTRIAL PARK HESHUN ELECTRICAL CO LTD
Current assignee: SUZHOU INDUSTRIAL PARK HESHUN ELECTRICAL CO LTD
Priority date: 2019-05-15
Filing date: 2019-05-15
Publication date: 2020-03-31
Anticipated expiration: 2029-05-15

Abstract

The utility model discloses an electric vehicle charging machine, 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, it has a detection device still to cross-over connection between positive bus and the negative pole bus, and this detection device is located between power supply unit and the direct current contactor, detection device further includes the power, relay, voltage sampler and the control unit of establishing ties with the power, the control unit is connected with the control end of relay for the break-make of control relay, voltage sampler is used for gathering the magnitude of voltage between positive bus and the negative pole bus, the control unit is according to the magnitude of voltage that comes from voltage sampler, the break-make of control relay. The utility model discloses the condenser of having avoided power module leads to the over-size and the condition of producing the trouble of impulse current with car battery is direct parallelly connected, has guaranteed the security and the stability of charging to the car.

Description

Electric vehicle charger

Technical Field

The utility model relates to an electric automobile charging device, in particular to electric vehicle charger 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 vehicle charging machine, this electric vehicle charging machine have avoided power module's condenser and car battery to connect in parallel directly to lead to the impulse current too big and the condition of producing the trouble, have guaranteed the security and the stability of charging to the car.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a charger for an electric vehicle 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;

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 above scheme, a fusible core is installed on the positive bus between the dc contactor and the charging positive terminal.

2. 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.

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 an electric vehicle charger, it adopts the mode that a plurality of power modules 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.

2. The utility model discloses electric motor car machine that charges, it has a detection device still to cross-over connection between its anodal bus and the negative bus, and this detection device is located between power supply unit and the direct current contactor, detection device further includes the power, with relay, voltage sampler and the control unit of power series connection, the control unit is connected with the control end of relay for the break-make of control relay, voltage sampler is used for gathering the magnitude of voltage between anodal bus and the negative bus, the control unit is according to the magnitude of voltage that comes from voltage sampler, the break-make of control relay, detection device's setting when charging machine charges, carries out reverse charge and detects its voltage to power supply unit to this judges whether power supply unit's power module kind backward diode damages, if damage stops charging promptly and carries out troubleshooting, has avoided power supply module's condenser and car battery direct parallelly connected to lead to the impulse current too big and the condition that produces the trouble And the safety and the stability of the charging of the automobile are ensured.

Drawings

FIG. 1 is a schematic diagram of the structure of the charger for the electric vehicle of the present invention;

fig. 2 is the utility model discloses detection device schematic structure in electric motor car machine that charges.

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; 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: an electric vehicle charger 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 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 fusible core is mounted on the positive bus 10 between the dc contactor 3 and the positive charging terminal 4.

Example 2: an electric vehicle charger 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;

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.

When the electric vehicle charger 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 grading adjustment of voltage during power supply is realized, and the electric vehicle charger is suitable for charging different types of vehicles; 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 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

1. The utility model provides an electric motor car machine that charges 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);

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 electric vehicle charger according to claim 1, characterized in that: and a fusible core is arranged on the positive bus (10) between the direct current contactor (3) and the charging positive terminal (4).

3. The electric vehicle charger 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.