CN209200735U - With earth leakage protective electric car charger - Google Patents

With earth leakage protective electric car charger Download PDF

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Publication number
CN209200735U
CN209200735U CN201821680798.9U CN201821680798U CN209200735U CN 209200735 U CN209200735 U CN 209200735U CN 201821680798 U CN201821680798 U CN 201821680798U CN 209200735 U CN209200735 U CN 209200735U
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CN
China
Prior art keywords
circuit
charging
chip microcontroller
current
resistance
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.)
Expired - Fee Related
Application number
CN201821680798.9U
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Chinese (zh)
Inventor
张应铭
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Zhongshan Pine Letter Electronics Co Ltd
Original Assignee
Zhongshan Pine Letter Electronics Co Ltd
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Priority to CN201821680798.9U priority Critical patent/CN209200735U/en
Application granted granted Critical
Publication of CN209200735U publication Critical patent/CN209200735U/en
Expired - Fee Related legal-status Critical Current
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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
    • 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
    • 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
    • Y02T10/72—Electric energy management in electromobility
    • 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
    • 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
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

Abstract

The utility model discloses with earth leakage protective electric car charger, including leakage protection circuit, power circuit, single-chip microcontroller, low current charge circuit, high-current charging circuit, bridge rectifier, and first be shorted resistance and second be shorted resistance, the power circuit is connect to provide operating voltage with single-chip microcontroller, single-chip microcontroller respectively with low current charge circuit, the control terminal of high-current charging circuit is connected to control its charging work or disconnection, low current charge circuit, the output end of high-current charging circuit exports electric current to the charging port of battery after rectifying by the bridge rectifier, first is shorted resistance, determine charging voltage specification to single-chip microcontroller whether second short circuit resistance connects with the input port of single-chip microcontroller and combines short circuit by the two.The leakage switch protection circuit added can reduce the danger to get an electric shock, and the country for the first time applies leakage protection circuit on charging circuit for electric vehicles.

Description

With earth leakage protective electric car charger
Technical field
The utility model relates to electric car chargers, especially with earth leakage protective electric car charger.
Background technique
The battery of traditional electric car has 36V, 48V, 64V, and 72V etc. different voltage specifications is corresponding just to have different rule The electric car charger of lattice, and the circuit board of electric car charger can only specially plate it is dedicated, such as 36V 36V special purpose relay And respective element, 48V 48V special purpose relay and respective element, if to realize different voltage parameters, it is necessary to increase Or element is reduced or changes, it greatly affected production efficiency and unnecessary waste, reduce loss.In addition, traditional electric car Lack earth leakage protective, frequent occurrence electric shock accidents.
Utility model content
In order to solve the above technical problems, the purpose of the utility model is to provide one kind to be suitable for 36V, 48V, 64V, 72V etc. Different voltages size battery cell with earth leakage protective electric car charger.
The technical solution adopted in the utility model is:
Circuit, power circuit, single-chip microcontroller, low current are protected with earth leakage protective electric car charger, including leakage switch Charging circuit, high-current charging circuit, bridge rectifier and dismountable first are shorted resistance and second and are shorted resistance, Leakage switch protects circuit to be arranged between alternating current output end and low current charge circuit, high-current charging circuit, the power supply Circuit is connect to provide operating voltage, the single-chip microcontroller control with low current charge circuit, high-current charging circuit respectively with single-chip microcontroller End processed connection to control its charging work or disconnection, low current charge circuit, high-current charging circuit output end pass through it is described Electric current is exported to the charging port of battery, the low current charge circuit, high-current charging circuit after bridge rectifier rectification All using mechanical relay and triode as switching device, first is shorted the input of resistance, the second short circuit resistance and single-chip microcontroller Port is detachably connected, and described first is shorted input whether connection as charging voltage specification of resistance, the second short circuit resistance Signal is to single-chip microcontroller.
The earth leakage protective electric car charger of band further includes overcharge protection circuit, which is serially connected in bridge Between formula rectification circuit and the charging port of battery, overcharge protection circuit is using mechanical relay and triode as switching device And its control terminal is connect with the single-chip microcontroller
The earth leakage protective electric car charger of band further includes battery voltage detection circuit, the battery voltage detection circuit It is connect with the single-chip microcontroller to ensure that single-chip microcontroller works normally again after charging port access battery.
The earth leakage protective electric car charger of band further includes the temperature protection control circuit connecting with single-chip microcontroller, the temperature Degree protection control circuit stops working for detecting the control single chip computer when temperature is spent higher than+80.
The earth leakage protective electric car charger of band further includes the LED indicating circuit connecting with single-chip microcontroller, the LED indication Circuit is used to indicate the working condition of charger.
The leakage switch protection circuit includes zero sequence current mutual inductor, controller, silicon-controlled, magnetictrip, this zero Sequence current transformer is arranged in outside alternating current inlet wire and the contact of the magnetictrip is serially connected in alternating current inlet wire, zero sequence current mutual inductance Device is connect to feed back electric leakage signal with the controller, and controller leads through and off by the coil of SCR control magnetictrip It opens.
The utility model has the beneficial effects that the utility model charger can pass through resistance on same circuit board R43, R42 short circuit over the ground disconnect, and realize the input signal of different combinations to single-chip microcontroller, combining form is respectively (R42 Connection, R43 connection), (R42 connection, R43 disconnect), (R42 disconnect, R43 connection), (R42 disconnection, R43 disconnection), four kinds are combined The input signal of four kinds of specification charging voltages such as 36V, 48V, 64V, 72V is respectively represented, then when single-chip microcontroller receives input letter Number and identify that user wants that specification charging voltage, that is, may be selected the corresponding charge mode prestored implement charging to battery Group, and then realize different voltage parameter, without increasing or decreasing or changing element, thus greatly facilitate production efficiency and Unnecessary waste reduces loss.Leakage switch protection circuit can reduce the danger to get an electric shock, and domestic for the first time by electric leakage guarantor Protection circuit is applied on charging circuit for electric vehicles.
Detailed description of the invention
Specific embodiment of the present utility model is described further with reference to the accompanying drawing.
Fig. 1 is the leakage switch protection circuit diagram of the utility model charger；
Fig. 2 is the live part circuit diagram of the utility model charger；
Fig. 3 is control and the detection part circuit diagram of the utility model charger；
Fig. 4 is the specification figure that the utility model resistance combination is shorted；
Fig. 5 is the power circuit diagram of the utility model charger.
Specific embodiment
As Figure 1-Figure 5, protecting with earth leakage protective electric car charger, including leakage switch for the utility model Circuit, power circuit (see Fig. 5), single-chip microcontroller U1, low current charge circuit 10, high-current charging circuit 20, bridge rectifier 30 and first be shorted resistance R42 and second be shorted resistance R43, leakage switch protect circuit setting alternating current output end with it is small Between current charging circuit 10, high-current charging circuit 20.Above-mentioned Multifunctional electric vehicle charger of filling is unencapsulated charger electricity Road plate, towards charger manufacturer rather than ordinary consumer, the first short circuit resistance R42 and the second short circuit resistance R43 are charging Device circuit board can be disconnected or be connected to manually by technical staff.
Such as Fig. 1, it includes zero sequence current mutual inductor L1, controller U4, silicon-controlled T3, electromagnetic trip that leakage switch, which protects circuit, Device, zero sequence current mutual inductor L1 is arranged in outside alternating current inlet wire and the contact of the magnetictrip (K1-SW1, K1-SW2) goes here and there Connect on alternating current inlet wire, zero sequence current mutual inductor L1 is connect to feed back electric leakage signal with the controller U4, controller U4 according to Whether there is electric leakage signal and the coil K1-L conducting of magnetictrip is controlled by silicon-controlled T3 and is disconnected, leakage switch protection electricity Road can reduce the danger to get an electric shock, and the country for the first time applies leakage protection circuit on charging circuit for electric vehicles.
Above-mentioned power circuit is connect to provide operating voltage with single-chip microcontroller U1, single-chip microcontroller U1 respectively with low current charge circuit 10, the control terminal of high-current charging circuit 20 is connected to control its charging work or disconnection, low current charge circuit 10, high current The output end of charging circuit 20 by the bridge rectifier 30 rectify after export electric current to battery charging port (VO+, VO-)；
Above-mentioned low current charge circuit 10, high-current charging circuit 20 all using mechanical relay and triode (K1, Q1, K2, Q2) it is used as switching device, first is shorted input port (9 feet, 8 of resistance R42, the second short circuit resistance R43 and single-chip microcontroller U1 Foot) connection and combine and be shorted by the two whether determine that charging voltage specification gives single-chip microcontroller U1, specification figure is as shown in Figure 4.
It further include overcharge protection circuit with earth leakage protective electric car charger as the further perfect of the technical program 40, which is serially connected between bridge rectifier 30 and the charging port of battery, and overcharge protection circuit 40 is adopted It uses mechanical relay K3 with triode Q4 as switching device and its control terminal is connect with the single-chip microcontroller U1, due to K2, K1 electricity If when road cannot turn off on time when or out of control, voltage can be more than after upper limit voltage 15.5V five seconds, and single-chip microcontroller can close by force K3 It is disconnected, so that playing battery is not filled bad effect.
It further include battery voltage detection with earth leakage protective electric car charger as the further improvement of the technical program Circuit 50, V-BATTERY battery voltage detection circuit: being made of D10, R38, D14, R39, C35, the battery voltage detection circuit 50 connect to ensure that single-chip microcontroller U1 is worked normally again after charging port access battery with the single-chip microcontroller U1.In addition, being additionally provided with Vdd voltage detection circuit: it is made of R7, D13, R6, C4.
It further include connecting with single-chip microcontroller U1 with earth leakage protective electric car charger as the further improvement of the technical program The temperature protection control circuit connect, is made of R7/R4, R5, C5, and when temperature, which is higher than+80, to be spent, single-chip microcontroller stops working, at this time Green LED, red LED flash alarm simultaneously.
It further include connecting with single-chip microcontroller U1 with earth leakage protective electric car charger as the further improvement of the technical program The LED indicating circuit connect, by green LED, red LED composition, which is used to indicate the working condition of charger.
This charger is that one kind to switch working principle reaches charging purpose, that is to say, that single group battery is in low-voltage Circuit is connected when 13.5V, is disconnected in high voltage 15.5V, is judged whether battery fills by the charging time of several sections of open and close It is full.
Battery of electric vehicle is currently used 36V, 48V, 64V, and tetra- kinds of voltages of 72V, 36V is by the battery strings of three 12V Join, 48V is by four, and 60V is by five, and for 72V by 6 battery compositions, the lower voltage limit of single group battery is set as small by we It is connected when 13.5V, disconnection when upper limit voltage is set greater than 15.5V, if constantly open voltage will continue to rise damage battery.
The charging principle and process of the technical program are as follows: if first connect 220V power supply, charger be it is idle, at this time Red LED flashing alarm, VO+, VO- do not have voltage output, K1, K2, and K3 is in an off state, and are primarily due to security consideration, because It is charger voltage considerably beyond human body 36V safe voltage.VO must first connect battery, then connect 220V power supply, and charger is It can work normally, at this time U1,10 feet obtain a positive high-voltage level, and U1 starts to work, and 5 feet export high level, and Q4, K3 are led Lead to, 6,7 feet, 3 seconds output high level of delay, Q1, K1, Q2, K2 conducting, electric current passes through C14, R16, R17, C11, R13, R12 charge and discharge Electricity is changed into DC voltage after the bridge rectifier of D3, D4, D5, D6 composition and charges the battery, i.e. starting large current charge.Its In, work as VO+, VO- output access battery pack positive and negative anodes, voltage will lower, and (battery pack is equivalent to the work of voltage-stablizer or load With), as charging progresses, battery voltage is gradually increasing, and capacitance-resistance voltage reduction circuit only serves the effect of current limliting.
It is large current charge first by taking single group battery as an example, when single group cell voltage reaches 15.5V, the delay of 6,7 feet is defeated Low level out, Q1, K1, Q2, K2 are disconnected, and complete to charge for the first time, although single group cell voltage reaches 15.5V at this time, due to It is large current charge, there is the effect of " inertia ", leads to actual voltage virtual height and underfill, virtual voltage only reaches after tested To the 60% of voltage rating, therefore, Q1, K1, voltage can decline after Q2, K2 are disconnected；
When voltage drops to 13.5V, 7 feet export again, and Q1, K1 conducting, this electric current only pass through C11, and R13, R12 carry out small Electric current charging, i.e. floating charging, also referred to as trickle charge；Capacity is bigger, and the required charging time is longer, otherwise shorter, so anti- Low current switch charging is carried out again, and when being less than or equal to 180 seconds in the charging time from 13.5V to 15.5V, green LED is red LED is lighted simultaneously, indicate at this time battery have been filled with 70% electricity, when charging between be less than or equal to 60 seconds when, indicate at this time Battery has been filled with 90% electricity, when charging between be less than or equal to 20 seconds when, indicate at this time battery have been filled with 100% electricity Amount, green LED are gone out, and K3, K1 are disconnected, charging complete.
The utility model charger by resistance R43, R42 short circuit over the ground, can disconnect on same circuit board, Realize the input signal of different combinations to single-chip microcontroller, combining form be respectively (R42 connection, R43 connection), (R42 connection, R43 is disconnected), (R42 disconnect, R43 connection), (R42 disconnect, R43 disconnection), four kinds of combinations respectively represent 36V, 48V, 64V, 72V Deng the input signal of four kinds of specification charging voltages, then when single-chip microcontroller receives the input signal and identifies that user wants that rule Lattice charging voltage may be selected the corresponding charge mode prestored and implement charging to battery pack.Leakage switch protection circuit can reduce The danger to get an electric shock, and the country for the first time apply leakage protection circuit on charging circuit for electric vehicles.
The foregoing is merely the preferred embodiments of the utility model, the utility model is not limited to above-mentioned embodiment party Formula, if with essentially identical means realize the utility model aim technical solution belong to the protection scope of the utility model it It is interior.

Claims (6)

1. with earth leakage protective electric car charger, it is characterised in that: protect circuit, power circuit, monolithic including leakage switch Machine, low current charge circuit, high-current charging circuit, bridge rectifier and dismountable first are shorted resistance and second It is shorted resistance, leakage switch protects circuit to be arranged between alternating current output end and low current charge circuit, high-current charging circuit, The power circuit is connect to provide operating voltage with single-chip microcontroller, single-chip microcontroller respectively with low current charge circuit, large current charge The control terminal of circuit is connected to control its charging work or disconnection, the output end of low current charge circuit, high-current charging circuit Electric current is exported to the charging port of battery, the low current charge circuit, high current after rectifying by the bridge rectifier Charging circuit all uses mechanical relay and triode as switching device, and first is shorted resistance, the second short circuit resistance and monolithic The input port of machine is detachably connected, and the first short circuit resistance, second are used as charging voltage to advise whether being shorted the connection of resistance The input signal of lattice is to single-chip microcontroller.
2. the earth leakage protective electric car charger of band according to claim 1, it is characterised in that: further include overcharging protection electricity Road, the overcharge protection circuit are serially connected between bridge rectifier and the charging port of battery, and overcharge protection circuit is using mechanical Relay is with triode as switching device and its control terminal is connect with the single-chip microcontroller.
3. the earth leakage protective electric car charger of band according to claim 1 or 2, it is characterised in that: further include battery electricity Detection circuit is pressed, which connect to ensure that single-chip microcontroller is again after charging port accesses battery with the single-chip microcontroller It works normally.
4. the earth leakage protective electric car charger of band according to claim 1 or 2, it is characterised in that: further include and monolithic The temperature protection control circuit of machine connection, the temperature protection control circuit control monolithic when temperature is spent higher than+80 for detecting Machine stops working.
5. the earth leakage protective electric car charger of band according to claim 1 or 2, it is characterised in that: further include and monolithic The LED indicating circuit of machine connection, the LED indicating circuit are used to indicate the working condition of charger.
6. the earth leakage protective electric car charger of band according to claim 1, it is characterised in that: the leakage switch protection Circuit includes zero sequence current mutual inductor, controller, silicon-controlled, magnetictrip, zero sequence current mutual inductor setting alternating current into Outside the line and contact of the magnetictrip is serially connected in alternating current inlet wire, and zero sequence current mutual inductor is connect with the controller to feed back Electric leakage signal, the coil conducting and disconnection that controller passes through SCR control magnetictrip.
CN201821680798.9U 2018-10-16 2018-10-16 With earth leakage protective electric car charger Expired - Fee Related CN209200735U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821680798.9U CN209200735U (en) 2018-10-16 2018-10-16 With earth leakage protective electric car charger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821680798.9U CN209200735U (en) 2018-10-16 2018-10-16 With earth leakage protective electric car charger

Publications (1)

Publication Number Publication Date
CN209200735U true CN209200735U (en) 2019-08-02

Family

ID=67408235

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821680798.9U Expired - Fee Related CN209200735U (en) 2018-10-16 2018-10-16 With earth leakage protective electric car charger

Country Status (1)

Country Link
CN (1) CN209200735U (en)

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20190802

Termination date: 20191016

CF01 Termination of patent right due to non-payment of annual fee