CN220022395U - Non-load active cut-off main loop power supply system - Google Patents
Non-load active cut-off main loop power supply system Download PDFInfo
- Publication number
- CN220022395U CN220022395U CN202321472867.8U CN202321472867U CN220022395U CN 220022395 U CN220022395 U CN 220022395U CN 202321472867 U CN202321472867 U CN 202321472867U CN 220022395 U CN220022395 U CN 220022395U
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- Prior art keywords
- load
- current
- power supply
- main loop
- electric vehicle
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- 238000007600 charging Methods 0.000 claims abstract description 50
- 230000005611 electricity Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000001012 protector Effects 0.000 description 23
- 238000010586 diagram Methods 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a no-load active cut-off main loop power supply system, which comprises a main loop and a control loop, wherein the main loop mainly comprises a single-phase 220V or three-phase 380V alternating current power supply, a breaker, a load and a main cable which is electrically connected in series in sequence, whether the control loop adopts a current transducer to monitor that the load current value is smaller than a preset threshold value to control an auxiliary release to open the breaker, or the main loop adopts an alternating current contactor which is connected in series on the main cable between the breaker and the load and enables the main loop to be automatically disconnected when the load current value of the current transducer is smaller than the preset threshold value; therefore, the electric energy loss of the electric equipment in a long-term electrified standby state is avoided, and the possibility of fire disaster of the electric equipment in an unmanned state is avoided. Particularly, the load is an electric vehicle charging pile and a charging battery thereof, an electric vehicle charging pile, an electric vehicle charger and a charging battery thereof, or an electric vehicle charger.
Description
Technical Field
The utility model belongs to the technical field of battery charging and electric power distribution, relates to a no-load active cut-off main loop power supply system, and particularly relates to a no-load active cut-off main loop power supply system for electric vehicles or electric vehicle battery charging pile power distribution.
Background
The existing charging process of the electric automobile or the battery charging pile or the charger of the electric automobile is generally divided into four charging stages: the first stage is pre-charging, the second stage is constant-current charging, the third stage is constant-voltage charging, and the fourth stage is floating charging; the existing electric automobile or electric automobile battery charging pile or charger is mostly arranged in an unattended area, and the charging pile or charger stands by for a long time after the night charging is finished, so that potential safety hazards of electricity consumption are brought, the battery is overcharged, and fire disaster is extremely easy to occur, and the service lives of the charging pile or charger, an electric automobile or electric automobile internal charging circuit board and the battery are greatly shortened.
Disclosure of Invention
In order to solve the above problems, an object of the present utility model is to provide a no-load active power-off main loop power system that only the charging pile or the charger itself is worn after the battery is charged by the electric vehicle or the battery charging pile or the charger of the electric vehicle, and that the main loop power is turned off when the battery itself is worn.
In order to achieve the above object, the non-load active cut-off main loop power supply system provided by the utility model comprises a main loop and a control loop, wherein the main loop mainly comprises a single-phase 220V or three-phase 380V alternating current power supply, a breaker, a load and a main cable which is connected with the single-phase 220V or three-phase 380V alternating current power supply in series in sequence, the control loop comprises a PLC controller, a current transmitter and a direct current power supply module which is respectively provided with a direct current output power supply, the direct current power supply module input power supply is electrically connected to the main cable between the single-phase 220V or three-phase 380V alternating current power supply and the breaker, the current transmitter is arranged outside the main cable between the breaker and the load, an analog output signal channel of the current transmitter is connected with an analog input signal channel of the PLC controller, and the control loop further comprises an auxiliary tripping device which drives the breaker to break through the current transmitter when the load current value of the current transmitter is smaller than a preset threshold value, or the main loop further comprises a direct current power supply module which is connected to the main cable between the breaker and the load in series, and the current transmitter is connected with the main cable when the load current value of the current transmitter is smaller than the preset threshold value to disconnect the main loop. The utility model can reduce the standby power consumption of the electrical equipment in a long-term electrified standby state of the electrical equipment such as an air conditioner, a television, a charging pile, a charger and the like, and can prevent the electrical equipment from generating electrical fire under an unmanned state.
Preferably, the mechanical driving component of the auxiliary release is mechanically connected with the circuit breaker, the electromagnetic coil of the mechanical driving component is respectively connected with the positive electrode of the digital signal output channel of the PLC and the public electrode connecting terminal, one end of a normally open auxiliary contact of the mechanical driving component is connected with the digital quantity input channel connecting terminal of the PLC, and the other end of the normally open auxiliary contact is connected with the direct current output power supply negative electrode of the direct current power supply module.
Preferably, the rated voltage of the circuit breaker is single-phase alternating current 220V or three-phase alternating current 380V, and the rated current is 63A or less.
Preferably, the load is an electric vehicle charging pile and a charging battery thereof, an electric vehicle charging pile, an electric vehicle charger and a charging battery thereof, or an electric vehicle charger. According to the utility model, in the long-term electrified standby state of electrical equipment such as a charging pile and a charger, the standby electric energy loss of the electrical equipment can be reduced, the possibility of fire disaster of the electrical equipment in an unmanned state is eliminated, and the service life of a rechargeable battery can be prolonged.
Preferably, the preset threshold is at least one of the charging pile and the charging battery loss value thereof, at least one of the charging pile loss value, at least one of the charger and the battery loss value thereof, or at least one of the charger loss value when the PLC controller monitors the load current through the current transmitter to determine that the battery state is changed into the battery charge cut-off state.
Preferably, the auxiliary release automatically opens the circuit breaker after a predetermined time delay before automatically opening the circuit breaker when the load current value of the current transmitter is smaller than a preset threshold value.
Preferably, the predetermined time is 5 minutes.
Preferably, the electromagnetic coil of the ac contactor is respectively connected with the positive electrode of the digital signal output channel and the public electrode connecting terminal of the PLC controller, one end of a normally open auxiliary contact is connected with the digital quantity input channel connecting terminal of the PLC controller, and the other end is connected with the dc output power supply negative electrode of the dc power supply module.
Preferably, the load is an electric vehicle charging pile and a charging battery thereof, an electric vehicle charging pile, an electric vehicle charger and a charging battery thereof, or an electric vehicle charger.
Preferably, the preset threshold is at least one of the charging pile and the charging battery loss value thereof, at least one of the charging pile loss value, at least one of the charger and the battery loss value thereof, or at least one of the charger loss value when the PLC controller monitors the load current through the current transmitter to determine that the battery state is changed into the battery charge cut-off state.
According to the utility model, the PLC is used for monitoring the load current through the current transducer, and when the load current value of the current transducer is smaller than the preset threshold value, the auxiliary tripping device or the alternating current contactor is controlled to disconnect the main loop, so that the energy consumption is reduced, and the occurrence of electric appliance fire is avoided. Particularly, the load is an electric vehicle charging pile and a charging battery thereof, an electric vehicle charging pile, an electric vehicle charger and a charging battery thereof, or an electric vehicle charger.
Drawings
Fig. 1 is a schematic diagram of a non-load active power-off main loop power system according to a first embodiment.
Fig. 2 is a schematic diagram of a non-load active power-off main loop power system according to a second embodiment.
Detailed Description
The non-load active cut-off main loop power supply system provided by the utility model is described in detail below with reference to the accompanying drawings and specific embodiments.
The reference numerals in the drawings are collectively described:
q1- - -leakage protector, V1- - -24V DC power supply module, A1- - -PLC controller, PA1- - -current transducer, TK1- - -auxiliary trip, X1- - -load, L, N- - -phase and neutral wire connection terminals of 220V power supply input end respectively, L1, L2, L3, N1- - -three phase and neutral wire connection terminals of 380V power supply input end respectively.
24V, 0V- - -are the positive pole and negative pole connecting terminals of the DC power supply of the PLC controller respectively, E0- - -the digital input channel connecting terminal of the PLC controller, used for sensing the opening and closing positions of the Q1 leakage protector, Y0, COM- - -the positive pole and the common pole connecting terminals of the digital signal output channel of the PLC controller respectively, providing auxiliary tripping device TK1 driving signals, AD0, AD1, AD2, GND- - -the three analog input signal channel connecting terminals and the input common connecting terminals of the PLC controller respectively, used for collecting the current measurement value of the current transmitter PA 1;
+24V, GND-positive and negative terminals of the current transducer PA1 dc power supply, respectively; the IO1+, IO2+, IO3+ and IO-are respectively the anodes and the output common pole of the three analog output signal channels of the current transmitter PA 1.
Example 1
FIG. 1 is a schematic diagram of a non-load active cut-off main loop power system; the non-load active cut-off main loop power supply system comprises a main loop and a control loop, wherein the main loop mainly comprises a single-phase 220V alternating current power supply, a leakage protector Q1, a load and a main cable which is electrically connected with the main loop in series in sequence, the control loop comprises a PLC controller, a current transmitter and a direct current power supply module which respectively provides 24V direct current output power supply, the input power supply of the direct current power supply module is electrically connected to the main cable between the single-phase 220V alternating current power supply and the leakage protector Q1, the current transmitter is arranged outside the single-phase main cable between the leakage protector Q1 and the load, an analog output signal channel of the current transmitter is connected with an analog input signal channel of the PLC controller, and the control loop further comprises an auxiliary release TK1 which enables the leakage protector Q1 to be automatically switched off when the load current value of the current transmitter is smaller than a preset threshold value. The load is an electric vehicle charging pile and a rechargeable battery thereof, an electric vehicle charging pile, an electric vehicle charger and a rechargeable battery thereof, or an electric vehicle charger.
The mechanical driving component of the auxiliary release TK1 is mechanically connected with the leakage protector Q1, the electromagnetic coil of the mechanical driving component is respectively connected with the positive electrode of the digital signal output channel of the PLC and the wiring terminal of the public electrode, one end of a normally open auxiliary contact is connected with the wiring terminal of the digital quantity input channel of the PLC, and the other end of the normally open auxiliary contact is connected with the negative electrode of the direct current output power supply.
According to the prior art, the leakage protector Q1 with rated current larger than 63A is provided with no auxiliary tripping device TK1, the leakage protector Q1 is a leakage protector with voltage of single-phase alternating current 220V and rated current of 63A and below.
The working principle is as follows: after the manual switch-on of the leakage protector Q1, the normally open auxiliary contact of the auxiliary release TK1 is closed, the PLC controller A1 monitors that the leakage protector Q1 is in the switch-on position through monitoring the normally open auxiliary contact state of the auxiliary release TK1, and meanwhile, the PLC controller A1 monitors the load current value in real time through the current transducer PA 1: when the monitored load current value is larger than a preset threshold value, the PLC A1 does not output a driving signal to the auxiliary release TK1, the leakage protector Q1 in the main loop keeps in the closed position, and power is continuously supplied to the load X1; when the monitored load current value is smaller than the preset threshold value and lasts for a period of time (taking the normal leaving time of personnel into consideration, such as 5-10 minutes), the PLC controller A1 outputs a driving signal to the auxiliary release TK1, so that the leakage protector Q1 is automatically switched off, and the main loop is cut off from supplying power to the load. The preset threshold is determined according to the loss of the charging pile or the charger and the loss of the battery.
The purpose of the present utility model can also be achieved by using a circuit breaker that does not have the leakage protection function as the leakage protector Q1 in the present embodiment.
Example two
As shown in fig. 2, a structural diagram of a non-load active power-off main loop power supply system according to the present embodiment is shown, and the present embodiment is an improvement based on the first embodiment, and the difference is that: the main loop is a three-phase alternating current 380V power supply loop, the leakage protector Q1 is correspondingly matched with a three-phase alternating current 380V leakage protector, the auxiliary tripping device TK1 is correspondingly matched with an auxiliary tripping device corresponding to the leakage protector, and the current transmitter PA1 is correspondingly matched with a three-phase alternating current 380V current transmitter.
The purpose of the present utility model can also be achieved by using a circuit breaker that does not have the leakage protection function as the leakage protector Q1 in the present embodiment.
Example III
Because of the state of the art, the rated current of the earth leakage protector Q1 is greater than 63A, whether it is a single-phase ac 220V or a three-phase ac 380V, without auxiliary release TK1. For this purpose, an embodiment is proposed which is modified on the basis of one or two embodiments, with the difference that: an alternating current contactor is connected in series on a main loop between the leakage protector and the current transducer to replace the auxiliary tripping device. The direct-current electromagnetic coil of the alternating-current contactor replaces an electromagnetic coil of the auxiliary release, and the normally open auxiliary contact of the alternating-current contactor replaces a normally open auxiliary contact of the auxiliary release. Therefore, the PLC controller A1 monitors the normally open auxiliary contact state of the alternating-current contactor, when the alternating-current contactor is in the on-position state, the PLC controller A1 monitors the load current value in real time through the current transmitter PA1 and judges and controls the alternating-current contactor to disconnect the main loop.
The leakage protector Q1 in this embodiment is a circuit breaker without leakage protection function, and the object of the present utility model can be achieved as well.
The main point of the utility model is that the PLC is utilized to monitor the load current through the current transducer, when the load current value of the current transducer is smaller than a preset threshold value, the auxiliary tripping device or the alternating current contactor is controlled to disconnect the main loop, thereby improving the electricity utilization safety of the electric equipment and being beneficial to saving energy. Although the embodiment uses the electric car battery charging pile or/and the electric car battery charger as an example and uses the electric leakage protector as an example in the main circuit, the protection scope of the utility model is not limited by the above, and the claims of the protection scope of the utility model are all inclusive of the gist of the utility model, and any variation scheme falls within the protection scope of the utility model.
Claims (10)
1. The utility model provides a no-load active cut-off main loop power supply system, includes main loop and control loop, wherein the main loop mainly comprises single-phase 220V or three-phase 380V alternating current power supply, circuit breaker, load and the main cable of establishing ties its electricity in proper order, control loop includes PLC controller, current transmitter and provides its direct current output power supply's direct current power module respectively, direct current power module input power supply electricity is connected on the main cable between single-phase 220V or three-phase 380V alternating current power supply and the circuit breaker, current transmitter establishes outside the main cable between circuit breaker and the load, the analog output signal path of current transmitter links to each other with the analog input signal path of PLC controller, its characterized in that, control loop still includes the load current value of current transmitter is less than the auxiliary trip that the PLC controller was through its drive circuit breaker break, perhaps the main loop still includes the load current value of current transmitter is less than the automatic contactor that makes main loop that opens when setting for the threshold value between circuit breaker and the load.
2. The no-load active cut-off main loop power supply system according to claim 1, wherein the auxiliary release mechanical driving component is mechanically connected with the circuit breaker, the electromagnetic coil of the auxiliary release mechanical driving component is respectively connected with the positive electrode of the digital signal output channel of the PLC controller and the common electrode connecting terminal, one end of a normally open auxiliary contact is connected with the digital input channel connecting terminal of the PLC controller, and the other end of the normally open auxiliary contact is connected with the direct current output power supply negative electrode of the direct current power supply module.
3. The no-load active disconnect primary loop power system of claim 2, wherein the circuit breaker has a rated voltage of 220V single phase ac or 380V three phase ac and a rated current of 63A and below.
4. The no-load active cut-off main loop power system of claim 3, wherein the load is an electric vehicle charging post and its rechargeable battery, an electric vehicle charging post, an electric vehicle charger and its rechargeable battery, or an electric vehicle charger.
5. The no-load active shutdown main loop power system of claim 4, wherein the predetermined threshold is at least one of the charging post and its battery loss magnitude value, at least one of the charging post loss magnitude value, at least one of the charger and its battery loss magnitude value, or at least one charger loss magnitude value when the PLC controller determines from a battery state of charge to a battery charge cutoff state by monitoring a load current through the current transmitter.
6. The no-load active disconnect primary loop power system of claim 4 or 5, wherein the auxiliary release automatically trips the circuit breaker after a predetermined time delay before the circuit breaker automatically trips when the load current value of the current transducer is less than a predetermined threshold.
7. The no-load active shut off main loop power system of claim 6, wherein the predetermined time is 5 minutes.
8. The no-load active cut-off main loop power supply system according to claim 1, wherein the electromagnetic coil of the ac contactor is respectively connected with the digital signal output channel positive electrode and the public electrode connecting terminal of the PLC controller, one end of a normally open auxiliary contact is connected with the digital quantity input channel connecting terminal of the PLC controller, and the other end is connected with the dc output power supply negative electrode of the dc power supply module.
9. The no-load active disconnect primary loop power system of claim 8, wherein the load is an electric vehicle charging post and its rechargeable battery, an electric vehicle charging post, an electric vehicle charger and its rechargeable battery, or an electric vehicle charger.
10. The no-load active shutdown main loop power system of claim 9, wherein the predetermined threshold is at least one of the charging post and its battery loss magnitude value, at least one of the charging post loss magnitude value, at least one of the charger and its battery loss magnitude value, or at least one of the charger loss magnitude value when the PLC controller determines from a battery state of charge to a battery charge cutoff state by monitoring a load current through the current transmitter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210756830.1A CN115065119A (en) | 2022-06-29 | 2022-06-29 | No-load active main loop power supply cutting-off system |
| CN2022107568301 | 2022-06-29 |
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| Publication Number | Publication Date |
|---|---|
| CN220022395U true CN220022395U (en) | 2023-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210756830.1A Pending CN115065119A (en) | 2022-06-29 | 2022-06-29 | No-load active main loop power supply cutting-off system |
| CN202321472867.8U Active CN220022395U (en) | 2022-06-29 | 2023-06-12 | Non-load active cut-off main loop power supply system |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210756830.1A Pending CN115065119A (en) | 2022-06-29 | 2022-06-29 | No-load active main loop power supply cutting-off system |
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| CN (2) | CN115065119A (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5082450B2 (en) * | 2007-01-12 | 2012-11-28 | 株式会社明電舎 | Power supply equipment |
| CN201854075U (en) * | 2010-11-30 | 2011-06-01 | 永济新时速电机电器有限责任公司 | Charging controller and charging system |
| CN202134943U (en) * | 2011-07-27 | 2012-02-01 | 南京中德保护控制系统有限公司 | Low-voltage protection measurement and control unit used for electric automobile AC charging post |
| CN103490484B (en) * | 2013-10-24 | 2015-10-14 | 肖国选 | Fuzzy controller for charger for electric vehicle |
| CN103560587A (en) * | 2013-11-15 | 2014-02-05 | 重庆瑞升康博电气有限公司 | Zero power consumption green power supply synthesized power distribution control box |
| CN208306388U (en) * | 2018-06-04 | 2019-01-01 | 南京能瑞电力科技有限公司 | A kind of reliable non-on-board charger of high safety |
| CN212180929U (en) * | 2020-03-18 | 2020-12-18 | 中汽研汽车检验中心(宁波)有限公司 | Automatic cut-off type electric automobile charging measuring device |
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2022
- 2022-06-29 CN CN202210756830.1A patent/CN115065119A/en active Pending
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- 2023-06-12 CN CN202321472867.8U patent/CN220022395U/en active Active
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| CN115065119A (en) | 2022-09-16 |
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