CN104143847A - Protection circuit of electric vehicle charging controller - Google Patents
Protection circuit of electric vehicle charging controller Download PDFInfo
- Publication number
- CN104143847A CN104143847A CN201410349023.3A CN201410349023A CN104143847A CN 104143847 A CN104143847 A CN 104143847A CN 201410349023 A CN201410349023 A CN 201410349023A CN 104143847 A CN104143847 A CN 104143847A
- Authority
- CN
- China
- Prior art keywords
- circuit
- signal
- overcurrent
- output
- signals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention discloses a protection circuit of an electric vehicle charging controller. The charging process can be safe and stable by means of the protection circuit. The protection circuit comprises the alternating current input end, the alternating current output end, an on-off device, an overvoltage and undervoltage sampling circuit, an overvoltage comparison circuit, an undervoltage comparison circuit, an overvoltage and undervoltage time delay restoring circuit, an electric leakage sampling circuit, an electric leakage comparison circuit, an electric leakage trigger retaining circuit, an overcurrent comparison circuit, an overcurrent time delay trigger circuit, an overcurrent time delay restoring circuit, a short circuit comparison circuit, a clock pulse signal producing circuit, a clock pulse signal sampling circuit, a clock pulse signal first comparison circuit and an on-off driving circuit. The on-off driving circuit drives the on-off device according to signals output by the overvoltage and undervoltage time delay restoring circuit, the electric leakage trigger retaining circuit, the overcurrent time delay trigger circuit and the clock pulse signal first comparison circuit to connect or disconnect the alternating current input end with the alternating current output end. The protection circuit is particularly suitable for being used in cooperation with an automobile charging controller.
Description
Technical field
The present invention relates to circuit structure, refer more particularly to pure hardware circuit structure, be specifically related to a kind of protective circuit for electric vehicle charging controller.
Background technology
At present, electric moving aid vehicle is in the ascendant, and electric automobile is more and more prosperous especially.Along with various motor vehicles constantly enter into ordinary other, the incomplete problem of electrically-charging equipment more and more highlights, and seriously restricted especially electric automobile universal of motor vehicle.So-called electrically-charging equipment imperfection, one refers to charging station into charging electric vehicle, charging pile also very little, and Regional Distribution is extremely unbalanced; Two refer to that charging device is that the design of charge controller is unreasonable.At this, the problem of charge controller is only discussed, and current charge controller, conventionally only with some simple protective circuits such as overcurrent, overvoltages, in the course of work of charge controller, can not monitor the degree of electric leakage, overcurrent etc. many abnormal conditions comprehensively; And once break down, whole charge controller must be restarted, it is very inconvenient to use.
Summary of the invention
Technical problem to be solved by this invention is: a kind of charging process protective circuit of the electric vehicle charging controller of safety and stability more that makes is provided.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of protective circuit of electric vehicle charging controller, comprising: ac input end, ac output end and the direct current regulation circuit of operating voltage is provided, and described protective circuit also includes:
String is located at the break-make device between ac input end and ac output end, and its effect is to control switching on and off of ac input end and ac output end;
Overvoltage/undervoltage sample circuit, its effect is that the real-time alternating voltage on ac circuit is scaled and converts overvoltage/undervoltage sampling direct voltage to;
Overvoltage comparison circuit, its effect is by overvoltage/undervoltage sample direct voltage and the comparison of overvoltage reference voltage, when overvoltage/undervoltage sampling direct voltage is greater than overvoltage reference voltage, output overvoltage alarm signal;
Under-voltage comparison circuit, its effect is by overvoltage/undervoltage sample direct voltage and under-voltage reference voltage comparison, when overvoltage/undervoltage sampling direct voltage is less than under-voltage reference voltage, output undervoltage warning signal;
Overvoltage/undervoltage delayed recovery circuit, it is triggered by over voltage alarm signal and undervoltage warning signal, output overvoltage/undervoltage cut-off signals, and recover after keeping setting-up time;
Electric leakage sample circuit, its effect is the leakage current on induction ac circuit, and converts the leakage current sensing to electric leakage sampling direct voltage;
Electric leakage comparison circuit, its effect is that electric leakage sampling direct voltage is compared with electric leakage reference voltage, when electric leakage sampling direct voltage is greater than electric leakage reference voltage, output leakage-current alarm signal;
Leakage trigger holding circuit, is triggered by leakage-current alarm signal, export and keep electric leakage cut-off signals;
Overcurrent sample circuit, its effect is that induction exchanges the alternating current in phase line, and converts this alternating current to overcurrent sampling direct voltage;
Overcurrent comparison circuit, its effect is that the overcurrent direct voltage of sampling is compared with overcurrent reference voltage, when overcurrent sampling direct voltage is greater than overcurrent reference voltage, output overcurrent signal;
Overcurrent delay circuits for triggering, its effect is when in setting-up time, over-current signal continues, output overcurrent alarm signal;
Overcurrent delay restore circuit, it is triggered by overcurrent alarm signal, output overcurrent cut-off signals, and recover after keeping setting-up time;
Short circuit comparison circuit, its effect is that the overcurrent direct voltage of sampling is compared with short circuit reference voltage, when overcurrent sampling direct voltage is greater than short circuit reference voltage, output short-circuit cut-off signals;
Clock pulse signal produces circuit, and its effect is to produce the clock pulse signal of a fixed frequency to clock pulse signal sample circuit;
Clock pulse signal sample circuit, its effect is to convert the clock pulse signal of charge controller feedback to charging feedback direct voltage;
Clock pulse signal the first comparison circuit, its effect is charging feedback direct voltage and charging to be completed to reference voltage compare, and when charging feedback direct voltage is greater than while having charged reference voltage, exports and is full of cut-off signals;
Break-make drive circuit, it is triggered by described overvoltage/undervoltage cut-off signals, overcurrent turn-off function signal, electric leakage cut-off signals, short circuit cut-off signals and arbitrary cut-off signals of being full of in cut-off signals, controls break-make device and disconnects being connected between ac output end and ac input end; Described overvoltage/undervoltage cut-off signals, overcurrent turn-off function signal, electric leakage cut-off signals, short circuit cut-off signals and the concrete connected mode that is full of cut-off signals are: overvoltage/undervoltage cut-off signals, overcurrent turn-off function signal, electric leakage cut-off signals, short circuit cut-off signals also connect, then, by an one way conducting device, isolate, and with by one way conducting device, isolate equally be full of cut-off signals and connect, as the triggering signal of break-make drive circuit.
As a kind of preferred version, in the protective circuit for electric vehicle charging controller, also include overcurrent number of times counting circuit, its effect is that overcurrent alarm signal is counted, when overcurrent alarm signal arrives set point number, output overcurrent is counted to alarm signal;
Overcurrent triggers holding circuit, and it is counted to alarm signal by overcurrent and triggers, and output overcurrent keeps triggering cut-off signals, connects together with described overvoltage/undervoltage cut-off signals, overcurrent turn-off function signal, electric leakage cut-off signals, short circuit cut-off signals.
As a kind of preferred version; in the protective circuit for electric vehicle charging controller, described overvoltage/undervoltage cut-off signals, overcurrent turn-off function signal, electric leakage cut-off signals, short circuit cut-off signals and overcurrent keep triggering cut-off signals and connect after by current-limiting resistance, light abnormal indicator light.
As a kind of preferred version; in the protective circuit for electric vehicle charging controller; also include lightning protection circuit; this lightning protection circuit comprises: the second piezo-resistance and the ceramic gas discharge tube that are arranged on the phase line of ac input end and the first piezo-resistance between the neutral line and are cascaded; the other end of the second piezo-resistance is connected with phase line, the other end ground connection of ceramic gas discharge tube.
As a kind of preferred version, in the protective circuit for electric vehicle charging controller, also include between the described neutral line and the second piezo-resistance and the tie point of ceramic gas discharge tube and be also provided with the 3rd piezo-resistance.
As a kind of preferred version, in the protective circuit for electric vehicle charging controller, described clock pulse signal sample circuit comprises: sampling resistor and sampling rectification circuit, described charging feedback direct voltage is exported by the rectification circuit of sampling.
As a kind of preferred version; in the protective circuit for electric vehicle charging controller; also include clock pulse signal the 4th comparison circuit; its effect be by charging feedback direct voltage with disconnect reference voltage and compare; when charging, feed back direct voltage and be greater than while disconnecting reference voltage, output power-off signal.
As a kind of preferred version, in the protective circuit for electric vehicle charging controller, also include clock pulse signal the second comparison circuit, its effect be by charging feedback direct voltage be full of reference voltage and compare, when charging, feed back direct voltage and be less than while being full of reference voltage, output flicker control signal;
Clock pulse signal the 3rd comparison circuit, its effect is charging feedback direct voltage to be completed to reference voltage with charging compare, and feeds back direct voltage be greater than while having charged reference voltage when charging, and blocks flash signal;
Rechargeable lamp control circuit, its effect is: when receiving power-off signal, close output; When receiving flicker control signal, export and keep flicker to drive signal;
Rechargeable lamp flicker control circuit; When charging control circuit is closed output, output black out signal; When receiving that flicker drives signal, and do not receive while blocking flash signal output scintillation pulse signal; When receiving that flicker drives signal and blocks flash signal, export normal bright level signal;
Rechargeable lamp drive circuit, its black out signal, scintillation pulse signal or normal bright level signal by the output of rechargeable lamp flicker control circuit triggers, and controls the state of charging indicator light.
As a kind of preferred version, in the protective circuit for electric vehicle charging controller, also include clock pulse signal the second comparison circuit, its effect be by charging feedback direct voltage be full of reference voltage and compare, when charging, feed back direct voltage and be less than while being full of reference voltage, output flicker control signal;
Clock pulse signal the first comparison circuit is when output is full of cut-off signals, and flash signal is blocked in output;
Rechargeable lamp control circuit, its effect is: when receiving power-off signal, close output; When receiving flicker control signal, export and keep flicker to drive signal;
Rechargeable lamp flicker control circuit; When charging control circuit is closed output, output black out signal; When receiving that flicker drives signal, and do not receive while blocking flash signal output scintillation pulse signal; When receiving that flicker drives signal and blocks flash signal, export normal bright level signal;
Rechargeable lamp drive circuit, its black out signal, scintillation pulse signal or normal bright level signal by the output of rechargeable lamp flicker control circuit triggers, and controls the state of charging indicator light.
The invention has the beneficial effects as follows: the present invention by monitor all sidedly overvoltage on alternating current circuit, under-voltage, electric leakage, overcurrent and overcurrent degree and charge controller its in the feedback signal of clock pulse, for charge controller has been built the running environment of a stability and safety, thereby make charge controller obtain effective protection; Also have, because this protective circuit has also increased overcurrent delay circuits for triggering, avoided well the phenomenon that causes charging to be interrupted due to instantaneous time current fluctuation; Owing to having increased leakage trigger holding circuit and overcurrent, trigger holding circuit, once make electric leakage or long-time overcurrent repeatedly, just cut off the electricity supply, make charging process safer; Owing to having increased overcurrent delay restore circuit, overvoltage/undervoltage delayed recovery circuit, when overcurrent once in a while and over voltage, can recover voluntarily, thereby guarantee the continuity of charging process.In addition, also increased charging indicator light, abnormal indicator light and driven accordingly and control circuit, having made user very clear to charge condition, having used convenient.
Accompanying drawing explanation
Fig. 1 is electric theory diagram of the present invention.
Fig. 2 is the electric theory structure schematic diagram of the annexation of clock pulse signal sample circuit of the present invention, clock pulse signal feedback circuit and charge controller.
Fig. 3 is the electric theory structure schematic diagram of lightning protection circuit.
Reference numeral in Fig. 1 to Fig. 3 is: 1, ac input end, 2, relay, 3, ac output end, 4, lightning protection circuit, 5, direct current regulation circuit, 6, overvoltage/undervoltage sample circuit, 7, overvoltage comparison circuit, 8, under-voltage comparison circuit, 9, electric leakage sample circuit, 10, electric leakage comparison circuit, 11, overcurrent sample circuit, 12, overcurrent comparison circuit, 13, short circuit comparison circuit, 14, CP signal generating circuit, 15, CP signal sample circuit, 151, sampling rectification circuit, 16, CP signal feedback circuit, 17, CP signal the first comparison circuit, 18, CP signal the second comparison circuit, 19, CP signal the 3rd comparison circuit, 20, rechargeable lamp control circuit, 21, rechargeable lamp flicker control circuit, 22, rechargeable lamp drive circuit, 23, overvoltage/undervoltage delayed recovery circuit, 24, leakage trigger holding circuit, 25, overcurrent delay circuits for triggering, 26, overcurrent delay restore circuit, 27, overcurrent number of times counting circuit, 28, overcurrent triggers holding circuit, 29, abnormal indicator light, 30, relay drive circuit, 31, vehicle interface, 32, charge controller, 33, charging indicator light, 34, CP signal the 4th comparison circuit, 35, CP signal switching circuit, 41, zero sequence current mutual inductor, 42, current transformer, 43, diode, 44, diode, 45, current-limiting resistance.
Embodiment
Below in conjunction with accompanying drawing, describe the specific embodiments of the protective circuit of a kind of electric vehicle charging controller of the present invention in detail:
As shown in Figure 1, the protection circuit of a kind of electric vehicle charging controller of the present invention, comprises ac input end 1, as the relay 2 of break-make device, ac output end 3, lightning protection circuit 4, for the direct current regulation circuit 5 of 12V operating voltage is provided, overvoltage/undervoltage sample circuit 6, overvoltage comparison circuit 7, under-voltage comparison circuit 8, electric leakage sample circuit 9, electric leakage comparison circuit 10, overcurrent sample circuit 11, overcurrent comparison circuit 12, short circuit comparison circuit 13, pulse signal generating circuit i.e. CP signal generating circuit 14, pulse signal sampling circuit i.e. CP signal sample circuit 15, pulse signal feedback circuit i.e. CP signal feedback circuit 16, pulse signal first comparison circuit i.e. CP signal first comparison circuit 17, pulse signal second comparison circuit i.e. CP signal second comparison circuit 18, pulse signal the 3rd comparison circuit i.e. CP signal the 3rd comparison circuit 19, rechargeable lamp control circuit 20, rechargeable lamp flashing control circuitry 21, rechargeable lamp drive circuit 22, charging indicator light 33, hour hands pulse signal the 4th comparison circuit i.e. CP signal the 4th comparison circuit 34, CP signal switching circuit 35, overvoltage/undervoltage delayed recovery circuit 23, leakage trigger holding circuit 24, overcurrent delay circuits for triggering 25, overcurrent delay restoring circuit 26, overcurrent counting how many times circuit 27, overcurrent triggers holding circuit 28, abnormal indicator lamp 29, as the relay drive circuit 30 of on-off control circuit, as the diode 43 and 44 of one way conducting device, current-limiting resistance 45, described relay 2 comprises two normally opened contact groups, phase line (also claiming live wire L) and the neutral conductor (also claiming zero line N) between this two normally opened contact groups corresponding connection ac input end 1 and ac output end 3, described overvoltage/undervoltage sample circuit 6, its a pair of input is connected with zero line N with live wire L respectively, overvoltage/undervoltage sample circuit 6 by this to input namely by ac circuit, the real-time alternating voltage between live wire L and zero line N is scaled and convert the overvoltage/undervoltage DC voltage of sampling to, output by overvoltage/undervoltage sample circuit 6 exports, described overvoltage comparison circuit 7, its reverse input end is connected with the output of overvoltage/undervoltage sample circuit 6, its positive input is connected with the output of the circuit that produces overvoltage reference voltage, overvoltage/undervoltage is sampled DC voltage compared with overvoltage reference voltage by overvoltage comparison circuit 7, when overvoltage/undervoltage sampling DC voltage is greater than overvoltage reference voltage, by its output output overvoltage alarm signal, described under-voltage comparison circuit 8, its reverse input end is connected with the output of overvoltage/undervoltage sample circuit 6, its positive input is connected with the output of the circuit that produces under-voltage reference voltage, overvoltage/undervoltage is sampled DC voltage compared with under-voltage reference voltage by under-voltage comparison circuit 8, when overvoltage/undervoltage sampling DC voltage is less than under-voltage reference voltage, export undervoltage warning signal by its output, described overvoltage/undervoltage delayed recovery circuit 23, its input is connected with the output of under-voltage comparison circuit 8 with overvoltage comparison circuit 7, overvoltage/undervoltage delayed recovery circuit 23 is triggered by over voltage alarm signal and undervoltage warning signal, exported overvoltage/undervoltage cut-off signals by its output, and recover after keeping setting-up time (being generally 5 seconds),Described electric leakage sample circuit 9, is responded to the leakage current on ac circuit by it for the zero sequence current mutual inductor 41 of sampling, and converts the leakage current sensing to electric leakage sampling DC voltage and exported by its output; Described electric leakage comparison circuit 10, its reverse input end is connected with the input of electric leakage sample circuit 9, its positive input is connected with the output of the circuit that produces electric leakage reference voltage, electric leakage sampling DC voltage is compared with electric leakage reference voltage by electric leakage comparison circuit 10, when electric leakage sampling DC voltage is greater than electric leakage reference voltage, exported leakage-current alarm signal by its output; Described leakage trigger holding circuit 24, its input with electric leakage comparison circuit 10 output be connected, leakage trigger holding circuit 24 is triggered by leakage-current alarm signal, by its output export and keep leak electricity cut-off signals; Described overcurrent sample circuit 11, is responded to the alternating current on live wire L by it for the current transformer 42 of sampling, and converts this alternating current to the overcurrent DC voltage of sampling and exported by its output; Described overcurrent comparison circuit 12, its reverse input end is connected with the output of overcurrent sample circuit 11, its positive input is connected with the output of the circuit that produces overcurrent reference voltage, the overcurrent DC voltage of sampling is compared with overcurrent reference voltage, when overcurrent sampling DC voltage is greater than overcurrent reference voltage, by its output output overcurrent signal; Described overcurrent delay circuits for triggering 25, its input is connected with the output of overcurrent comparison circuit 12, when over-current signal in setting-up time (being generally 10 seconds) is lasting, by its output output overcurrent alarm signal; Described overcurrent delay restoring circuit 26, its input is connected with the output of described overcurrent delay circuits for triggering 25, when its input receives overcurrent alarm signal, by its output output overcurrent cut-off signals, this refers to output-feedback stabilization, after keeping setting-up time (being generally 10 ~ 20 minutes), return to low level; Described short circuit comparison circuit 13, its reverse input end is connected with the output of described overcurrent sample circuit 11, its positive input is connected with the output of the circuit that produces short reference voltage, short reference voltage is conventionally high 0.3 ~ 0.5 volt than above-mentioned overcurrent reference voltage, the overcurrent DC voltage of sampling is compared with short reference voltage by short circuit comparison circuit 13, when overcurrent sampling DC voltage is greater than short reference voltage, by its output output short-circuit cut-off signals; Described CP signal generating circuit 14, its effect is the clock pulse signal that produces a fixed frequency, is exported by its output; Described CP signal switching circuit 35 is the relay S2 as gate-controlled switch in Fig. 2, this relay S2 has a normally-open normally-close contact sets, as shown in Figure 2, the central contact of the normally-open normally-close contact sets of relay S2 is as the output of CP signal switching circuit 35, the normally opened contact of this normally-open normally-close contact sets is connected with the 12V output of direct current regulation circuit 5, the normally-closed contact of this normally-open normally-close contact sets is connected with the output of CP signal generating circuit 14, and relay S2 is controlled by described CP signal the 4th comparison circuit 34; Described CP signal sample circuit 15 comprises:Sampling resistor R1 and sampling rectification circuit 151, one end of sampling resistor R1 is connected with the central contact of the normally-open normally-close contact sets of the output of CP signal switching circuit 35 i.e. relay S2, the other end of sampling resistor R1 is connected with the input of sampling rectification circuit 151 and is connected to charge controller 32 by vehicle interface 31 as sampled point CP1 together with live wire L, zero line N, earth connection PE, sampling rectification circuit 151 converts the clock pulse signal that controls feedback by charge controller 32 to charging feedback DC voltage, is exported by its output, described CP signal the 4th comparison circuit 34, its reverse input end is connected with the output of the sampling rectification circuit 151 of CP signal sample circuit 15, the output of circuit that its positive input and generation disconnect reference voltage (being conventionally set as 9.8V) is connected, when charging feedback DC voltage is greater than when disconnecting reference voltage, the output of CP signal the 4th comparison circuit 34, in control relay S2, exports power-off signal, described CP signal first comparison circuit 17, its reverse input end is connected with the output of CP signal sample circuit 15, its positive input is connected with the output that produces the circuit that charging completes reference voltage, charging feedback DC voltage and charging are completed reference voltage (being generally 7V) and compare by CP signal first comparison circuit 17, when charging feedback DC voltage is greater than charging when completing reference voltage, its output exports and is full of cut-off signals, the output of CP signal first comparison circuit 17 is connected to the control end of relay drive circuit 30 after a diode 44 isolation, described overcurrent counting how many times circuit 27, its input is connected with the output of overcurrent delay circuits for triggering 25, overcurrent counting how many times circuit 27 is counted overcurrent alarm signal, when arriving set point number (being generally 3 times), counts to alarm signal by its output output overcurrent, described overcurrent triggers holding circuit 28, and its input is connected with the output of overcurrent counting how many times circuit 27, when its input is received overcurrent when counting to alarm signal, is exported by its output and is kept overcurrent to keep triggering cut-off signals, the output of the output of the overvoltage/undervoltage delayed recovery circuit 23 of output overvoltage/undervoltage cut-off signals, the overcurrent delay restoring circuit 26 of output overcurrent cut-off signals, the output of leakage trigger holding circuit 24 that exports electric leakage cut-off signals and the output of the inferior overcurrent triggering holding circuit 28 of counting to cut-off signals of output overcurrent connect together, then two-way is divided into, one tunnel is connected with abnormal indicator lamp 29 through a current-limiting resistance 45, another road is connected to the control end of relay drive circuit 30 through diode 43, and then by the break-make of relay drive circuit 30 control relay 2, as shown in Figure 3, described lightning protection circuit 4 comprises: be arranged on the first piezo-resistance RV1 and the second piezo-resistance RV2 being cascaded and the ceramic gas discharge tube G1 between live wire L and the zero line N of ac input end 1, the other end of the second piezo-resistance RV2 is connected with live wire L, the other end of ceramic gas discharge tube G1 is connected with earth connection PE, in order to prevent live wire L and zero line N from connecing insteadThe 3rd piezo-resistance RV3 is also provided with between zero line N and the second piezo-resistance RV2 and the tie point of ceramic gas discharge tube G1, described CP signal second comparison circuit 18, its reverse input end is connected with the output of CP signal sample circuit 15, the output of circuit that its positive input and generation are full of reference voltage (being generally 6.8V) is connected, CP signal second comparison circuit 18 by charging feedback DC voltage be full of reference voltage and compare, when charging feedback DC voltage is less than when being full of reference voltage, export flicker control signal by its output, in the present embodiment, the power output of considering CP signal first comparison circuit 17 is limited, block flash signal to be exported by described CP signal the 3rd comparison circuit 19, its reverse input end is connected with the output of the sampling rectification circuit 151 in CP signal sample circuit 15, its positive input is connected with the output that produces the circuit that charging completes reference voltage, charging feedback DC voltage and charging are completed reference voltage and compare by CP signal the 3rd comparison circuit 19, when charging feedback DC voltage is greater than charging when completing reference voltage, export block flash signal by its output, described rechargeable lamp control circuit 20, its input is connected with the output of described CP signal second comparison circuit 18, when the input of rechargeable lamp control circuit 20 receives flicker control signal, exports flicker drive singal by its output, described rechargeable lamp flashing control circuitry 21, its input is connected with the output of rechargeable lamp control circuit 20, control the control end that produces flicker oscillating impulse circuit to be connected with the output of CP signal the 3rd comparison circuit 19, the output of rechargeable lamp flashing control circuitry 21 is connected with the input of described rechargeable lamp drive circuit 22, the output of rechargeable lamp drive circuit 22 is connected with the positive pole of charging indicator light 33, the minus earth (the direct current ground of direct current regulation circuit 5) of charging indicator light 33, when the power-off signal being exported by CP signal the 4th comparison circuit 34 when the reset terminal of rechargeable lamp control circuit 20 controls, the output of rechargeable lamp control circuit 20 is inoperative, rechargeable lamp control flashing circuit 21 is quit work, charging indicator light 33 extinguishes, in actual charging process, when there is no power-off signal and block flash signal, rechargeable lamp control circuit 20 exports flicker control signal to rechargeable lamp flashing control circuitry 21, rechargeable lamp flashing control circuitry 21 exports flicker driving pulse to rechargeable lamp drive circuit 22, charging indicator light 33 is glimmered, and after being full of, producing blockade flash signal by CP signal the 3rd comparison circuit 19, flicker oscillating impulse circuit is stopped oscillation, and rechargeable lamp flashing control circuitry 21 exports normal bright level signal to rechargeable lamp drive circuit 22, makes charging indicator light 33 Chang Liang.
As shown in Figure 2, when practical application, also be provided with CP signal feedback circuit 16, between CP signal feedback circuit 16 and described sampled point CP1, be provided with isolating diode D1, this CP signal feedback circuit 16 comprises: divider resistance R2, R3 and as the relay S1 of gate-controlled switch, this relay S1 is controlled by charge controller 32, one end of divider resistance R2 and R3 and connect after be connected with the negative pole of diode D1, the other end ground connection of divider resistance R3, ground connection after the other end of divider resistance R2 is connected in series with a normally opened contact group of relay S1, the positive pole of described diode D1 is connected with sampled point CP1.Like this, divider resistance R3 or and connect after divider resistance R2 and the sampling resistor R1 in R3 and CP signal sample circuit 15 just form a bleeder circuit.Charge controller 32 can allow sampled point CP1 export the clock pulse signal of different amplitudes according to its residing different charged states, and different charged states refer to: just in charged state and full state.
In charging normal process, relay S1 is in closure state, make divider resistance R2 and R3 and connect rear and sampling resistor R1 dividing potential drop, the charging feedback direct voltage obtaining after 151 rectifications of over-sampling rectification circuit is conventionally in 6V left and right, and CP signal the second comparison circuit 18 positive inputs be full of reference voltage conventionally in about 6.8V, CP signal the second comparison circuit 18 output flicker control signals, after being full of, relay S1 disconnects, like this, divider resistance R3 and sampling resistor R1 carry out dividing potential drop, the charging feedback direct voltage obtaining after 151 rectifications of over-sampling rectification circuit is conventionally in 9V left and right, and the charging of CP signal the 3rd comparison circuit 19 positive inputs completes reference voltage and is conventionally arranged on 7V, at this moment, CP signal the 3rd comparison circuit 19 output flicker locking signals, after vehicle interface 31 disconnects, the clock pulse signal that CP signal generating circuit 14 produces is by sampling resistor R1 and sampling rectification circuit 151 rear be directly connected with the reverse input end of CP signal the 4th comparison circuit 34 (CP signal feedback circuit 16 is inoperative), like this, the charging feedback direct voltage obtaining is more than 10 volts, and the voltage of the positive input of CP signal the 4th comparison circuit 34 is set in 9.8V conventionally, at this moment, CP signal the 4th comparison circuit 34 is in output power-off signal, the normally opened contact of relay S1 is connected, normally-closed contact disconnects, sampled point CP1 exports 12 volts of DC level.
In sum, it is only preferred embodiment of the present invention, not be used for limiting scope of the invention process, all equalizations of doing according to the shape described in the claims in the present invention scope, structure, feature and spirit change and modify, and all should be included within the scope of claim of the present invention.
Claims (9)
1. a protective circuit for electric vehicle charging controller, comprising: ac input end, ac output end and the direct current regulation circuit of operating voltage is provided, it is characterized in that, and described protective circuit also includes:
String is located at the break-make device between ac input end and ac output end, and its effect is to control switching on and off of ac input end and ac output end;
Overvoltage/undervoltage sample circuit, its effect is that the real-time alternating voltage on ac circuit is scaled and converts overvoltage/undervoltage sampling direct voltage to;
Overvoltage comparison circuit, its effect is by overvoltage/undervoltage sample direct voltage and the comparison of overvoltage reference voltage, when overvoltage/undervoltage sampling direct voltage is greater than overvoltage reference voltage, output overvoltage alarm signal;
Under-voltage comparison circuit, its effect is by overvoltage/undervoltage sample direct voltage and under-voltage reference voltage comparison, when overvoltage/undervoltage sampling direct voltage is less than under-voltage reference voltage, output undervoltage warning signal;
Overvoltage/undervoltage delayed recovery circuit, it is triggered by over voltage alarm signal and undervoltage warning signal, output overvoltage/undervoltage cut-off signals, and recover after keeping setting-up time;
Electric leakage sample circuit, its effect is that induction exchanges the leakage current on loop line, and converts the leakage current sensing to electric leakage sampling direct voltage;
Electric leakage comparison circuit, its effect is that electric leakage sampling direct voltage is compared with electric leakage reference voltage, when electric leakage sampling direct voltage is greater than electric leakage reference voltage, output leakage-current alarm signal;
Leakage trigger holding circuit, is triggered by leakage-current alarm signal, export and keep electric leakage cut-off signals;
Overcurrent sample circuit, its effect is that induction exchanges the alternating current in phase line, and converts this alternating current to overcurrent sampling direct voltage;
Overcurrent comparison circuit, its effect is that the overcurrent direct voltage of sampling is compared with overcurrent reference voltage, when overcurrent sampling direct voltage is greater than overcurrent reference voltage, output overcurrent signal;
Overcurrent delay circuits for triggering, its effect is when in setting-up time, over-current signal continues, output overcurrent alarm signal;
Overcurrent delay restore circuit, it is triggered by overcurrent alarm signal, output overcurrent cut-off signals, and recover after keeping setting-up time;
Short circuit comparison circuit, its effect is that the overcurrent direct voltage of sampling is compared with short circuit reference voltage, when overcurrent sampling direct voltage is greater than short circuit reference voltage, output short-circuit cut-off signals;
Clock pulse signal produces circuit, and its effect is to produce the clock pulse signal of a fixed frequency to clock pulse signal sample circuit;
Clock pulse signal sample circuit, its effect is to convert the clock pulse signal of charge controller feedback to charging feedback direct voltage;
Clock pulse signal the first comparison circuit, its effect is charging feedback direct voltage and charging to be completed to reference voltage compare, and when charging feedback direct voltage is greater than while having charged reference voltage, exports and is full of cut-off signals;
Break-make drive circuit, it is triggered by described overvoltage/undervoltage cut-off signals, overcurrent turn-off function signal, electric leakage cut-off signals, short circuit cut-off signals and arbitrary cut-off signals of being full of in cut-off signals, controls break-make device and disconnects being connected between ac output end and ac input end; Described overvoltage/undervoltage cut-off signals, overcurrent turn-off function signal, electric leakage cut-off signals, short circuit cut-off signals and the concrete connected mode that is full of cut-off signals are: overvoltage/undervoltage cut-off signals, overcurrent turn-off function signal, electric leakage cut-off signals, short circuit cut-off signals also connect, then, by an one way conducting device, isolate, and with by one way conducting device, isolate equally be full of cut-off signals and connect, as the triggering signal of break-make drive circuit.
2. the protective circuit for electric vehicle charging controller according to claim 1, is characterized in that, described protective circuit also includes:
Overcurrent number of times counting circuit, its effect is that overcurrent alarm signal is counted, when arriving set point number, output overcurrent is counted to alarm signal;
Overcurrent triggers holding circuit, and it is counted to alarm signal by overcurrent and triggers, and output overcurrent keeps triggering cut-off signals, connects together with described overvoltage/undervoltage cut-off signals, overcurrent turn-off function signal, electric leakage cut-off signals, short circuit cut-off signals.
3. according to the protective circuit for electric vehicle charging controller described in claim 2; it is characterized in that, described overvoltage/undervoltage cut-off signals, overcurrent turn-off function signal, electric leakage cut-off signals, short circuit cut-off signals and overcurrent keep triggering cut-off signals and connect after by current-limiting resistance, light abnormal indicator light.
4. the protective circuit for electric vehicle charging controller according to claim 1; it is characterized in that; described protective circuit also includes: lightning protection circuit; this lightning protection circuit comprises the second piezo-resistance and the ceramic gas discharge tube that is arranged on the phase line of ac input end and the first piezo-resistance between the neutral line and is cascaded; the other end of the second piezo-resistance is connected with phase line, the other end ground connection of ceramic gas discharge tube.
5. the protective circuit for electric vehicle charging controller according to claim 4, is characterized in that, is also provided with the 3rd piezo-resistance between the described neutral line and the second piezo-resistance and the tie point of ceramic gas discharge tube.
6. according to the protective circuit for electric vehicle charging controller described in any one in claim 1 to 5; it is characterized in that; described clock pulse signal sample circuit comprises: sampling resistor and sampling rectification circuit, described charging feedback direct voltage is exported by the rectification circuit of sampling.
7. according to the protective circuit for electric vehicle charging controller described in any one in claim 1 to 5; it is characterized in that; also include clock pulse signal the 4th comparison circuit; its effect be by charging feedback direct voltage with disconnect reference voltage and compare; when charging, feed back direct voltage and be greater than while disconnecting reference voltage, output power-off signal.
8. the protective circuit for electric vehicle charging controller according to claim 7, is characterized in that described protective circuit also includes:
Clock pulse signal the second comparison circuit, its effect is that charging feedback direct voltage is compared with being full of reference voltage, feeds back direct voltage and is less than while being full of reference voltage, output flicker control signal when charging;
Clock pulse signal the 3rd comparison circuit, its effect is charging feedback direct voltage to be completed to reference voltage with charging compare, and feeds back direct voltage be greater than while having charged reference voltage when charging, flash signal is blocked in output;
Rechargeable lamp control circuit, its effect is: when receiving power-off signal, close output; When receiving flicker control signal, export and keep flicker to drive signal;
Rechargeable lamp flicker control circuit; When charging control circuit is closed output, output black out signal; When receiving that flicker drives signal, and do not receive while blocking flash signal output scintillation pulse signal; When receiving that flicker drives signal and blocks flash signal, export normal bright level signal;
Rechargeable lamp drive circuit, its black out signal, scintillation pulse signal or normal bright level signal by the output of rechargeable lamp flicker control circuit triggers, and controls the state of charging indicator light.
9. the protective circuit for electric vehicle charging controller according to claim 7, is characterized in that described protective circuit also includes:
Clock pulse signal the second comparison circuit, its effect is that charging feedback direct voltage is compared with being full of reference voltage, feeds back direct voltage and is less than while being full of reference voltage, output flicker control signal when charging;
Clock pulse signal the first comparison circuit is when output is full of cut-off signals, and flash signal is blocked in output;
Rechargeable lamp control circuit, its effect is: when receiving power-off signal, close output; When receiving flicker control signal, export and keep flicker to drive signal;
Rechargeable lamp flicker control circuit; When charging control circuit is closed output, output black out signal; When receiving that flicker drives signal, and do not receive while blocking flash signal output scintillation pulse signal; When receiving that flicker drives signal and blocks flash signal, export normal bright level signal;
Rechargeable lamp drive circuit, its black out signal, scintillation pulse signal or normal bright level signal by the output of rechargeable lamp flicker control circuit triggers, and controls the state of charging indicator light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410349023.3A CN104143847B (en) | 2014-07-22 | 2014-07-22 | A kind of holding circuit of electric vehicle charging controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410349023.3A CN104143847B (en) | 2014-07-22 | 2014-07-22 | A kind of holding circuit of electric vehicle charging controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104143847A true CN104143847A (en) | 2014-11-12 |
| CN104143847B CN104143847B (en) | 2016-05-25 |
Family
ID=51852955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410349023.3A Active CN104143847B (en) | 2014-07-22 | 2014-07-22 | A kind of holding circuit of electric vehicle charging controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104143847B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753033A (en) * | 2015-04-16 | 2015-07-01 | 重庆梅安森科技股份有限公司 | Power output overcurrent and overvoltage protector and anti-interference method thereof |
| CN105162074A (en) * | 2015-08-26 | 2015-12-16 | 南京康尼科技实业有限公司 | Portable electric leakage protection controller |
| CN106300559A (en) * | 2016-10-18 | 2017-01-04 | 惠州Tcl移动通信有限公司 | The recovery control method of a kind of charger based on mobile terminal protection and system |
| CN107492932A (en) * | 2017-09-08 | 2017-12-19 | 湖南长高思瑞自动化有限公司 | A kind of charge protection method and system of DC charging unit |
| CN110729698A (en) * | 2019-09-24 | 2020-01-24 | 珠海格力电器股份有限公司 | MCU overcurrent protection circuit and control method thereof |
| CN113193538A (en) * | 2021-06-11 | 2021-07-30 | 林蔓琦 | Bidirectional leakage protector |
| US11381076B2 (en) | 2018-08-13 | 2022-07-05 | The Vollrath Company, L.L.C. | AC controlled relay drive circuit |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5959437A (en) * | 1997-02-10 | 1999-09-28 | Seiko Instruments Inc. | Charge and discharge control circuit |
| JP2012090458A (en) * | 2010-10-20 | 2012-05-10 | Nippon Soken Inc | Power supply device |
| CN102496211A (en) * | 2011-12-15 | 2012-06-13 | 华立仪表集团股份有限公司 | Charge metering system and metering method for charging station |
| CN102723747A (en) * | 2011-03-30 | 2012-10-10 | 海洋王照明科技股份有限公司 | A battery charging circuit and an illuminating lamp |
| CN202586322U (en) * | 2012-05-10 | 2012-12-05 | 深圳茂硕电源科技股份有限公司 | Tripping type lightning protection circuit |
| CN202817688U (en) * | 2012-08-01 | 2013-03-20 | 华立仪表集团股份有限公司 | Power supply protection circuit of electric automobile charging pile and electric automobile charging pile |
| CN103138356A (en) * | 2011-11-29 | 2013-06-05 | 海洋王照明科技股份有限公司 | Lighting fitting and charging circuit of secondary battery |
| CN103921690A (en) * | 2014-05-09 | 2014-07-16 | 陈继业 | Electric vehicle charging pile |
| CN204012829U (en) * | 2014-07-22 | 2014-12-10 | 张家港友诚科技机电有限公司 | A kind of protective circuit of electric vehicle charging controller |
-
2014
- 2014-07-22 CN CN201410349023.3A patent/CN104143847B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5959437A (en) * | 1997-02-10 | 1999-09-28 | Seiko Instruments Inc. | Charge and discharge control circuit |
| JP2012090458A (en) * | 2010-10-20 | 2012-05-10 | Nippon Soken Inc | Power supply device |
| CN102723747A (en) * | 2011-03-30 | 2012-10-10 | 海洋王照明科技股份有限公司 | A battery charging circuit and an illuminating lamp |
| CN103138356A (en) * | 2011-11-29 | 2013-06-05 | 海洋王照明科技股份有限公司 | Lighting fitting and charging circuit of secondary battery |
| CN102496211A (en) * | 2011-12-15 | 2012-06-13 | 华立仪表集团股份有限公司 | Charge metering system and metering method for charging station |
| CN202586322U (en) * | 2012-05-10 | 2012-12-05 | 深圳茂硕电源科技股份有限公司 | Tripping type lightning protection circuit |
| CN202817688U (en) * | 2012-08-01 | 2013-03-20 | 华立仪表集团股份有限公司 | Power supply protection circuit of electric automobile charging pile and electric automobile charging pile |
| CN103921690A (en) * | 2014-05-09 | 2014-07-16 | 陈继业 | Electric vehicle charging pile |
| CN204012829U (en) * | 2014-07-22 | 2014-12-10 | 张家港友诚科技机电有限公司 | A kind of protective circuit of electric vehicle charging controller |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753033A (en) * | 2015-04-16 | 2015-07-01 | 重庆梅安森科技股份有限公司 | Power output overcurrent and overvoltage protector and anti-interference method thereof |
| CN104753033B (en) * | 2015-04-16 | 2018-05-04 | 重庆梅安森科技股份有限公司 | A kind of power supply output overcurrent and overvoltage protective device and its anti-interference method |
| CN105162074A (en) * | 2015-08-26 | 2015-12-16 | 南京康尼科技实业有限公司 | Portable electric leakage protection controller |
| CN105162074B (en) * | 2015-08-26 | 2017-12-01 | 南京康尼环网开关设备有限公司 | A kind of portable earth-leakage protection controller |
| CN106300559A (en) * | 2016-10-18 | 2017-01-04 | 惠州Tcl移动通信有限公司 | The recovery control method of a kind of charger based on mobile terminal protection and system |
| CN106300559B (en) * | 2016-10-18 | 2020-07-14 | 惠州Tcl移动通信有限公司 | Mobile terminal-based charger protection recovery control method and system |
| CN107492932A (en) * | 2017-09-08 | 2017-12-19 | 湖南长高思瑞自动化有限公司 | A kind of charge protection method and system of DC charging unit |
| US11381076B2 (en) | 2018-08-13 | 2022-07-05 | The Vollrath Company, L.L.C. | AC controlled relay drive circuit |
| CN110729698A (en) * | 2019-09-24 | 2020-01-24 | 珠海格力电器股份有限公司 | MCU overcurrent protection circuit and control method thereof |
| CN110729698B (en) * | 2019-09-24 | 2020-12-25 | 珠海格力电器股份有限公司 | MCU overcurrent protection circuit and control method thereof |
| CN113193538A (en) * | 2021-06-11 | 2021-07-30 | 林蔓琦 | Bidirectional leakage protector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104143847B (en) | 2016-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104143847A (en) | Protection circuit of electric vehicle charging controller | |
| CN204012829U (en) | A kind of protective circuit of electric vehicle charging controller | |
| CN108599120B (en) | Direct current limiting circuit breaker | |
| CN103779828A (en) | Two-way direct-current on-off circuit based on artificial zero crossing and on-off method thereof | |
| CN205248148U (en) | Arc control device and do not have arc switch | |
| CN103022978B (en) | For the over under-voltage protection circuit of multiple pulse rectification circuit | |
| CN104158152B (en) | A kind of motor driver protection circuit and means of defence | |
| CN104935077A (en) | Anti-interference electricity device for series capacitance type AC contactor and control method thereof | |
| CN204156315U (en) | The anti-lockset of a kind of switch cubicle five | |
| CN102222874A (en) | Direct-current solid-state circuit breaker | |
| CN104505805A (en) | Breaker operating circuit for medium voltage system | |
| CN203859544U (en) | Battery device for preventing reverse installation of battery | |
| CN103366460A (en) | Circuit breaker for prepaid electric meter | |
| CN105807175A (en) | Signal injection method and signal injection device for searching for single-phase earth fault | |
| CN105655987A (en) | Cell protection circuit, cell and mobile terminal | |
| CN204012667U (en) | A kind of motor driver protection circuit | |
| CN203826922U (en) | An intelligent air switch device | |
| CN106166990A (en) | A kind of startup power circuit | |
| CN103618281A (en) | Hybrid type bidirectional full-load direct current cut-off device and cut-off method based on manual zero passage technology | |
| CN206975126U (en) | A kind of high-voltage large-capacity power capacitor short-circuit test device | |
| CN202150689U (en) | Active type power supply surge backup protection breaker | |
| CN217282209U (en) | Open circuit protection device for current transformer | |
| AU2019341286B2 (en) | Arc-extinguishing circuit and apparatus | |
| CN204760332U (en) | Circuit breaker operating device controlgear and control box thereof | |
| CN204314645U (en) | A kind of low-voltage distribution system by screen break-make automaton |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Jiangang Inventor before: Wang Youfeng Inventor before: Zheng Xiaobo Inventor before: Chen Jiangang |
|
| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Suzhou City, Jiangsu province 215611 Zhangjiagang City Tangqiao town bridge on the south side of Zhangjiagang Miao Yong Jin Youcheng Electromechanical Technology Co. Ltd. Patentee after: Zhangjiagang Yi Cheng new energy Polytron Technologies Inc Address before: Suzhou City, Jiangsu province 215611 Zhangjiagang City Tangqiao town bridge on the south side of Zhangjiagang Miao Yong Jin Youcheng Electromechanical Technology Co. Ltd. Patentee before: Zhangjiagang Uchen Technical Mechanical Electric Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder |