CN211089104U - Three-phase alternating current charging protection circuit - Google Patents
Three-phase alternating current charging protection circuit Download PDFInfo
- Publication number
- CN211089104U CN211089104U CN201922388265.4U CN201922388265U CN211089104U CN 211089104 U CN211089104 U CN 211089104U CN 201922388265 U CN201922388265 U CN 201922388265U CN 211089104 U CN211089104 U CN 211089104U
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- detection circuit
- phase
- circuit
- alternating current
- charging protection
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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
- Y02T90/14—Plug-in electric vehicles
Abstract
The utility model discloses a safe and reliable's three-phase AC charging protection circuit more, include: the device comprises a three-phase alternating current input end, an alternating current charging plug for charging a vehicle, an over-voltage and under-voltage detection circuit, a grounding detection circuit, a leakage detection circuit, an over-current detection circuit, a temperature detection circuit, a controller, a CP signal generation circuit, a CP signal detection circuit, a working power supply and an on-off driving circuit; a controllable electronic switch is arranged between the three-phase alternating current input end and the alternating current input end of the alternating current charging plug, and the output end of the over-voltage and under-voltage detection circuit, the output end of the grounding detection circuit, the output end of the leakage detection circuit, the output end of the over-current detection circuit, the output end of the temperature detection circuit, the control end of the on-off drive circuit, the control end of the CP signal generation circuit and the output end of the CP signal detection circuit are connected with the corresponding ends of the controller. Three-phase alternating current charging protection circuit can be arranged in filling electric pile for electric vehicle charges.
Description
Technical Field
The utility model relates to a charging protection circuit especially involves a three-phase alternating current charging protection circuit.
Background
At present, a three-phase ac charging protection circuit in a charging pile for charging a vehicle generally has a structure including: the vehicle charging device comprises a three-phase alternating current input end, an alternating current charging plug, an overvoltage and undervoltage detection circuit, an electric leakage detection circuit, an overcurrent detection circuit, a CP signal generation circuit, a CP signal detection circuit and a controller, wherein the alternating current charging plug, the overvoltage and undervoltage detection circuit, the CP signal generation circuit, the electric leakage detection circuit and the controller are used for charging a vehicle, the three-phase alternating current input end is usually connected with the alternating current charging plug through an MOS (metal oxide semiconductor) tube, and the output end of the overvoltage and undervoltage detection circuit, the output end of the electric leakage detection circuit, the output end of the overcurrent detection circuit, the control end (grid) of the MOS tube. In the actual use process, on one hand, because the grounding detection circuit is not arranged, the safety risk exists; on the other hand, once the overcurrent detection circuit is out of order, the MOS tube is likely to be burnt out by instantaneous overcurrent, and the normal use of the charging pile is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the three-phase alternating current charging protection circuit is safer and more reliable.
In order to solve the technical problem, the utility model discloses a technical scheme is: a three-phase ac charging protection circuit comprising: three-phase AC input end, be used for the vehicle charging AC charging plug, cross undervoltage detection circuit, ground connection detection circuit, electric leakage detection circuit, overcurrent detection circuit, temperature detection circuit, controller, CP (control pilot) signal production circuit, CP signal detection circuit and the working power supply who provides operating voltage and the on-off drive circuit that is used for controlling controllable electronic switch break-make, three-phase AC input end include: three phase line input ends and a zero line input end; a controllable electronic switch is arranged between the three-phase alternating current input end and the alternating current input end of the alternating current charging plug, and the output end of the over-voltage and under-voltage detection circuit, the output end of the grounding detection circuit, the output end of the leakage detection circuit, the output end of the over-current detection circuit, the output end of the temperature detection circuit, the control end of the on-off drive circuit, the control end of the CP signal generation circuit and the output end of the CP signal detection circuit are connected with the corresponding ends of the controller.
As a preferable scheme, the three-phase ac charging protection circuit further includes a display screen, and a data terminal of the display screen is connected to a corresponding terminal of the controller.
Preferably, in the three-phase ac charging protection circuit, the display screen is an O L ED screen.
As a preferable scheme, in the three-phase ac charging protection circuit, the display screen is a liquid crystal display.
Preferably, in the three-phase ac charging protection circuit, the controller is further connected with at least one L ED indicator light.
As a preferred scheme, the three-phase ac charging protection circuit further includes a key adjustment circuit, and an output terminal of the key adjustment circuit is connected to a corresponding terminal of the controller.
Preferably, in the three-phase ac charging protection circuit, the controllable electronic switch is a relay.
As a preferred scheme, in the three-phase ac charging protection circuit, the three-phase ac input terminal is connected to three phase lines and one zero line of three-phase ac through an ac power plug in a one-to-one correspondence manner.
Preferably, in the three-phase ac charging protection circuit, the ac power plug further includes a ground line PE connected to the working power supply and the ac charging plug.
The utility model has the advantages that: the utility model discloses owing to increased temperature detect circuit and ground connection detection circuitry, guaranteed reliable ground connection, moreover, can detect through the temperature, before detecting overflowing or overflow and detect when malfunctioning, all can the perception unusual, in time turn-offs alternating current charging plug's power, improved the security that fills electric pile greatly. In addition, through adopting the relay as controllable electronic switch, increased the overload capacity of filling electric pile, even there is little overcurrent also can not damage the device to make whole operation that makes to fill electric pile safe and reliable more.
Drawings
Fig. 1 is an electrical schematic structural diagram of the three-phase ac charging protection circuit of the present invention.
The reference numbers in figure 1 are 1, an alternating current power supply plug, 2, an alternating current charging plug, 3, a working power supply, 4, a relay, 5, an over-voltage and under-voltage detection circuit, 6, a grounding detection circuit, 7, a leakage detection circuit, 8, an over-current detection circuit, 9, a temperature detection circuit, 10, an on-off driving circuit, 11, a CP signal generation circuit, 12, a CP signal detection circuit, 13, a microprocessor, 14, an O L ED display screen, 15, L ED indicator lamps, 16 and a key adjusting circuit.
Detailed Description
The following describes a specific embodiment of a three-phase ac charging protection circuit according to the present invention in detail with reference to fig. 1:
as shown in FIG. 1, the utility model discloses a three-phase AC charging protection circuit, including AC power plug 1, AC charging plug 2 for charging the vehicle, cross undervoltage detection circuit 5, ground fault detection circuit 6, electric leakage detection circuit 7, overcurrent detection circuit 8, temperature detection circuit 9, the controller, CP signal generating circuit 11 (for converting the PWM signal that the controller sent into the electric automobile CP signal that satisfies national standard), CP signal detection circuit 12 (for detecting the actual high-low level voltage value of CP signal, in order to realize the effective communication with the charging stake), working power supply 3 that provides the operating voltage, on-off drive circuit 10 for controlling relay 4 as controllable electronic switch, O L ED display 14, L ED display 15 and key adjustment circuit 16, three-phase AC input end (including three phase lines L, L2 and L, a zero line N), and a ground line PE through AC power socket (not shown in the figure in the field), connect to AC power plug 1, three-phase lines 4831, L2 and 863, a zero line N, and a ground line PE through AC power plug, a microprocessor 357, a microprocessor, a power supply, a microprocessor, a power supply.
In practical use, the rated current can be adjusted in a non-charging state, the specific process is that the rated current adjustment is started when a setting key (belonging to the conventional technology in the field and not shown in the figure) is pressed for more than three seconds, at the moment, the rated current on an O L ED display screen is selected, the setting key is pressed for a short time for adjustment, the selectable range of the rated current is 10A/16A/20A/24A/28A/32A, and the adjustment state can be exited when the setting key is pressed for more than 3 seconds after the adjustment is finished, and the normal working state is started.
In the charging process, when the effective value of the leakage current exceeds a certain set value (such as 22mA), the power supply is cut off within 100ms, the self-recovery is not carried out, and the alternating current power plug 1 needs to be manually plugged and pulled to restart; when the current effective value continuously exceeds 1.1 times of the rated current by 10S, carrying out overload protection, recovering at intervals of 5 minutes, wherein the self-recovery times are usually three times, and after the fourth overload protection, the power supply is not recovered, and the alternating current power supply plug 1 needs to be manually plugged and unplugged for restarting; when the voltage exceeds 1.25 times of the rated voltage of the rated value, the protection is carried out after the voltage of the power grid is stabilized for 5S, when the voltage is lower than 85% of the rated voltage, the protection is carried out, and the protection is carried out after the voltage of the power grid is stabilized for 5S; when the effective value of the current exceeds 1.5 times of the rated current, the control box judges that the current is short-circuited, the action is protected within 500ms, and the alternating-current power plug 1 needs to be manually plugged and unplugged for restarting; the overtemperature protection is started when the temperature of the AC power plug 1 or the temperature inside the control box exceeds 85 ℃, and the overtemperature protection is recovered when the temperature of the AC power plug 1 and the temperature inside the control box are both lower than 65 ℃.
In summary, the present invention is only a preferred embodiment, and is not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the shapes, structures, features and spirit of the claims of the present invention should be included in the scope of the claims of the present invention.
Claims (9)
1. A three-phase ac charging protection circuit comprising: three-phase AC input and be used for giving the AC charging plug that the vehicle charges, three-phase AC input include: three phase line input ends and a zero line input end; the three-phase AC input end and AC charging plug's AC input end between be provided with controllable electronic switch, its characterized in that, three-phase AC charging protection circuit still include: the power supply comprises an overvoltage and undervoltage detection circuit, a grounding detection circuit, an electric leakage detection circuit, an overcurrent detection circuit, a temperature detection circuit, a controller, a CP signal generation circuit, a CP signal detection circuit, a working power supply for providing working voltage and an on-off driving circuit for controlling the on-off of a controllable electronic switch, wherein the output end of the overvoltage and undervoltage detection circuit, the output end of the grounding detection circuit, the output end of the electric leakage detection circuit, the output end of the overcurrent detection circuit, the output end of the temperature detection circuit, the control end of the on-off driving circuit, the control end of the CP signal generation circuit and the output end of the CP signal detection circuit are connected with the corresponding ends of the controller.
2. The three-phase alternating current charging protection circuit of claim 1, further comprising a display screen, wherein a data terminal of the display screen is connected to a corresponding terminal of the controller.
3. The three-phase ac charging protection circuit of claim 2, wherein the display screen is an O L ED screen.
4. The three-phase ac charging protection circuit of claim 2, wherein the display screen is a liquid crystal display screen.
5. The three-phase ac charging protection circuit of claim 1, wherein said controller is further connected to at least one L ED indicator light.
6. The three-phase ac charging protection circuit of claim 1, further comprising a key adjustment circuit, wherein an output terminal of the key adjustment circuit is connected to a corresponding terminal of the controller.
7. The three-phase ac charging protection circuit of claim 1, wherein the controllable electronic switch is a relay.
8. The three-phase alternating current charging protection circuit according to any one of claims 1 to 7, wherein the three-phase alternating current input terminal is connected with three phase lines and a zero line of three-phase alternating current in a one-to-one correspondence manner through an alternating current power plug.
9. The three-phase ac charging protection circuit of claim 8, wherein the ac power plug further comprises a ground line, the ground line being connected to the operating power source and the ac charging plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922388265.4U CN211089104U (en) | 2019-12-26 | 2019-12-26 | Three-phase alternating current charging protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922388265.4U CN211089104U (en) | 2019-12-26 | 2019-12-26 | Three-phase alternating current charging protection circuit |
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| Publication Number | Publication Date |
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| CN211089104U true CN211089104U (en) | 2020-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922388265.4U Active CN211089104U (en) | 2019-12-26 | 2019-12-26 | Three-phase alternating current charging protection circuit |
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| CN (1) | CN211089104U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113809715A (en) * | 2021-09-25 | 2021-12-17 | 浙江巨磁智能技术有限公司 | High-integration-level multifunctional protection method for IC-CPD |
-
2019
- 2019-12-26 CN CN201922388265.4U patent/CN211089104U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113809715A (en) * | 2021-09-25 | 2021-12-17 | 浙江巨磁智能技术有限公司 | High-integration-level multifunctional protection method for IC-CPD |
| CN113809715B (en) * | 2021-09-25 | 2023-12-08 | 浙江巨磁智能技术有限公司 | High-integration multifunctional protection method for IC-CPD |
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