CN208046264U - Electric vehicle charging device - Google Patents
Electric vehicle charging device Download PDFInfo
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- CN208046264U CN208046264U CN201820303046.4U CN201820303046U CN208046264U CN 208046264 U CN208046264 U CN 208046264U CN 201820303046 U CN201820303046 U CN 201820303046U CN 208046264 U CN208046264 U CN 208046264U
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- 238000007600 charging Methods 0.000 title claims abstract description 108
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- 230000005611 electricity Effects 0.000 claims description 18
- 230000010412 perfusion Effects 0.000 claims description 15
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Abstract
The utility model provides a kind of electric vehicle charging device, wherein the output end of the first signal processing module and the start end of modulation module connect；The output end of modulation module and the primary side of main transformer connect, and the peak point current setting end of modulation module and the infrared light receiver part of photoelectrical coupler connect；The secondary side of the first of main transformer is connect with the input terminal of second signal processing module, and the output end of second signal processing module is connect with the input terminal of battery voltage sampling module；The cathode power supply input terminal of battery voltage sampling module is connect with the anode of the storage battery charging interface for being inserted into electric vehicle charging device, the negative power supply input terminal of battery voltage sampling module is connect with the cathode of storage battery charging interface, the both ends of the output end of battery voltage sampling module and the infrared light emission device of photoelectrical coupler connect, the voltage of electric vehicle accumulator can be detected automatically by reaching, and adjust automatically charging voltage, improve the technique effect of the safety of electric vehicle charging process.
Description
Technical field
The utility model is related to electric vehicle Voltage Technique fields, more particularly, to a kind of electric vehicle charging device.
Background technology
In the prior art, electric vehicle is, by components such as controller, motors, electric energy to be turned using accumulator as energy source
Mechanical energy movement is turned to, to control the vehicle that size of current changes speed.The battery case of difference electric vehicle is of different sizes at present, and
And the electric system voltage of different electric vehicles may also be different, such as：It is the electricity of 12V that the electric system of 48V, which needs 4 voltages,
Pond, the electric system of 60V need the battery etc. of 5 12V.
Currently, the charger of electric vehicle generally has fixed charging voltage, such as：Charging voltage is the charger of 48V,
It should be the electric vehicle charging with 4 batteries；Charging voltage is the charger of 60V, should be the electric vehicle with 5 batteries
Charging etc..
In practical applications, user generally can not accurately determine the quantity of battery in battery case, if user accidentally will charging
Voltage charges with unmatched battery case, it would be possible to since overvoltage leads to cell damage in battery case, cause unnecessary warp
Ji loss.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of electric vehicle charging device, to alleviate in the prior art
Existing that charging voltage and unmatched battery case charge since user misses, caused overvoltage makes battery in battery case damage
It is bad, the technical issues of causing unnecessary economic loss.
In a first aspect, the utility model embodiment provides a kind of electric vehicle charging device, including：First signal processing mould
Block, photoelectrical coupler, modulation module, main transformer, second signal processing module and battery voltage detection module；
The output end of first signal processing module is connect with the start end of the modulation module, for being the modulation
Module, which provides, starts voltage；
The output end of the modulation module is connect with the primary side of the main transformer, for modulate input voltage signal
The high-frequency voltage signal to match at the primary side with the main transformer, the modulation module peak point current setting end with it is described
The infrared light receiver part of photoelectrical coupler connects；
The secondary side of the first of the main transformer is connect with the input terminal of the second signal processing module, the second signal
The output end of processing module is connect with the input terminal of the battery voltage sampling module；
The cathode power supply input terminal of the battery voltage sampling module and the electricity for being inserted into the electric vehicle charging device
The anode connection of bottle charging interface, the negative power supply input terminal of the battery voltage sampling module with for being inserted into the electric vehicle
The cathode of the storage battery charging interface of charging unit connects, the output end of the battery voltage sampling module and photoelectrical coupler it is red
The both ends of outer light emitting devices connect.
With reference to first aspect, the utility model embodiment provides the first possible embodiment of first aspect,
In, first signal processing module includes：Fuse, the first decoupling unit, the first rectification unit and filter unit；
The first input end of one end connection alternating current of the fuse, the other end of the fuse are moved back with described first
The first input end of coupling unit connects, the second input terminal of the alternating current with it is described second defeated with the first decoupling unit
Enter end connection, the output end of the first decoupling unit is connect with the input terminal of first rectification unit, first rectification
The output end of unit is connect with the input terminal of the filter unit, and the output end of the filter unit is opened with the modulation module
Moved end connects.
With reference to first aspect, the utility model embodiment provides second of possible embodiment of first aspect,
In, the modulation module includes：Power supply control chip, buffer cell, isolating transformer, the first perfusion unit and the second perfusion list
Member；
The start end of the power supply control chip is the start end of the modulation module, the output of the power supply control chip
End is connect with the input terminal of the buffer cell, and the output end of the buffer cell is connect with the primary side of the isolating transformer,
The secondary side of the first of the isolating transformer is connect with the input terminal of the first perfusion unit, and the second of the isolating transformer is secondary
Side is connect with the input terminal of the second perfusion power supply.
With reference to first aspect, the utility model embodiment provides the third possible embodiment of first aspect,
In, further include：Soft start unit, filter capacitor, integrating capacitor and feedback resistance；
Two output ends of the soft start unit are connect with the both ends of the filter capacitor；
The both ends of the filter capacitor are connect with the both ends of the infrared light receiver part of the photoelectrical coupler respectively, described
One end of integrating capacitor is connect with one end of the infrared light receiver part, the other end of the integrating capacitor and the power supply control
The current sense input of coremaking piece connects, the current sense input of the power supply control chip also with one end of feedback resistance
Connection, the other end of the feedback resistance are connect with the output end of the perfusion unit.
With reference to first aspect, the utility model embodiment provides the 4th kind of possible embodiment of first aspect,
In, the second signal processing module includes：Second decoupling unit, the second rectification unit, inductance and filter unit；
The input terminal of the second decoupling unit is connect with the first secondary side of the main transformer, the second decoupling unit
Output end connect with the input terminal of second rectification unit, the output end of second rectification unit and the one of the inductance
End connection, the other end of the inductance are with described, the input terminal connection of the filter unit, the output end of the filter unit
The output end of the second signal processing module.
With reference to first aspect, the utility model embodiment provides the 5th kind of possible embodiment of first aspect,
In, the battery voltage detection module includes：First diode, first resistor, first comparator, the second comparator, sampling electricity
Resistance, upper comparison resistance, triode, second resistance, 3rd resistor, the 4th resistance, lower comparison resistance, the 5th resistance and the 6th electricity
Resistance；
The cathode connecting pin of first diode and one end of first resistor connect, the other end of the first resistor with
The anode connection terminal of the infrared light emission device of the photoelectrical coupler connects, the output end of the first comparator with it is described red
The cathode connecting pin of outer light emitting devices connects, and the reference voltage input node of the first comparator, described first compares
The control terminal of device respectively with the positive input terminal of second comparator, one end of sample resistance, one end of the 3rd resistor,
One end connection of one end of four resistance, the 5th resistance, the other end ground connection of the 3rd resistor；
The positive input terminal of second comparator is connect with one end of upper comparison resistance, the upper comparison resistance it is another
The other end at end, the other end of the 4th resistance and the 5th resistance is connect with the anode of the storage battery charging interface, described to take
The collector of the other end of sample resistance and triode connects, the emitter ground connection of the triode, the base stage of the triode with
One end of the second resistance connects, and the other end of the second resistance is connect with the output end of second comparator, described
The negative connecting pin of second comparator is connect with one end of the lower comparison resistance, the other end ground connection of the lower comparison resistance, institute
The negative connecting pin of the second comparator is stated connect with power supply with after the 5th resistance and resistance series connection, the 5th resistance with
Reference voltage output end is provided between 6th resistance.
With reference to first aspect, the utility model embodiment provides the 6th kind of possible embodiment of first aspect,
In, further include：Current detecting control unit；
The first input end of the current detecting control unit and the electricity for being inserted into the electric vehicle charging device
The anode connection of bottle charging interface, the second input termination reference voltage input of the current detecting unit, the electric current
The output end of detection control unit is connect with the cathode of the infrared light emission device of the photoelectrical coupler.
With reference to first aspect, the utility model embodiment provides the 7th kind of possible embodiment of first aspect,
In, further include：Electric current indicating unit；
The first input end of the electric current indicating unit is connect with reference voltage input, and the electric current instruction is single
Second input terminal of member is connect with the anode for being inserted into the storage battery charging interface of the electric vehicle charging device.
With reference to first aspect, the utility model embodiment provides the 8th kind of possible embodiment of first aspect,
In, further include：Charging state detection circuit；
The first input end of the charging state detection circuit and the electricity for being inserted into the electric vehicle charging device
The anode connection of bottle charging interface, the first input end of the charging state detection circuit connect with reference voltage input
It connects.
With reference to first aspect, the utility model embodiment provides the 9th kind of possible embodiment of first aspect,
In, further include radiating module；
The input terminal of the radiating module is connect with the second secondary side of the main transformer, the output end of the radiating module
For connecting radiator fan, the radiating module is used to cool down for the circuit.
The utility model embodiment brings following advantageous effect：The utility model embodiment can detect electric vehicle automatically
The voltage of storage battery, and adjust automatically charging voltage improve the safety of electric vehicle charging process.
Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood by implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is realized and is obtained in book, claims and attached drawing.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment cited below particularly, and
The appended attached drawing of cooperation, is described in detail below.
Description of the drawings
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific implementation mode or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, other drawings may also be obtained based on these drawings.
Fig. 1 is the modular structure schematic diagram for the electric vehicle charging device that the utility model embodiment provides；
Fig. 2 is the partial enlargement structure chart of the first signal processing module in Fig. 1 that the utility model embodiment provides；
Fig. 3 is the partial enlargement structure chart of modulation module in Fig. 1 that the utility model embodiment provides；
Fig. 4 is the partial enlargement structure chart of second signal processing module in Fig. 1 that the utility model embodiment provides；
Fig. 5 is the partial enlargement structure chart of battery voltage detection module in Fig. 1 that the utility model embodiment provides；
Fig. 6 is soft start unit in Fig. 1 that the utility model embodiment provides, filter capacitor, integrating capacitor and feedback electricity
The partial enlargement structure chart of resistance；
Fig. 7 is the structure chart for the current detecting control unit that the utility model embodiment provides；
Fig. 8 is the structure chart for the electric current indicating unit that the utility model embodiment provides；
Fig. 9 is the structure chart for the charging state detection circuit that the utility model embodiment provides；
Figure 10 is the partial enlargement structure chart for the radiating module that the utility model embodiment provides；
Figure 11 is the partial enlargement structure chart for the protection circuit that the utility model embodiment provides；
Figure 12 is the partial enlargement structure chart for the power generation circuit that the utility model embodiment provides.
Specific implementation mode
To keep the purpose, technical scheme and advantage of the utility model embodiment clearer, below in conjunction with attached drawing to this
The technical solution of utility model is clearly and completely described, it is clear that described embodiment is that the utility model part is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
The every other embodiment obtained under the premise of creative work, shall fall within the protection scope of the present invention.
Currently, in practical applications, user generally can not accurately determine the quantity of battery in battery case, if user accidentally will
Charging voltage charges with unmatched battery case, it would be possible to which, since overvoltage leads to cell damage in battery case, it is unnecessary to cause
Economic loss, be based on this, the utility model embodiment provide a kind of electric vehicle charging device, electric vehicle can be detected automatically
The voltage of storage battery, and adjust automatically charging voltage improve the safety of electric vehicle charging process.
For ease of understanding the present embodiment, charge first to a kind of electric vehicle disclosed in the utility model embodiment
Device describes in detail, as shown in Figure 1, the electric vehicle charging device includes：First signal processing module 11 (such as Fig. 2),
Photoelectrical coupler 12, modulation module 13, main transformer 14, second signal processing module 15 and battery voltage detection module 16；
The output end of first signal processing module 11 is connect with the start end of the modulation module, for being the tune
Molding block, which provides, starts voltage；
The output end of the modulation module 13 is connect with the primary side of the main transformer 14, for being by input voltage signal
Be modulated into the high-frequency voltage signal to match with the primary side of the main transformer, the peak point current setting end of the modulation module with
The infrared light receiver part of the photoelectrical coupler connects；
The secondary side of the first of the main transformer 14 is connect with the input terminal of the second signal processing module, second letter
The output end of number processing module is connect with the input terminal of the battery voltage sampling module；
The cathode power supply input terminal of the battery voltage sampling module 16 with for being inserted into the electric vehicle charging device
Storage battery charging interface anode connection, the negative power supply input terminal of the battery voltage sampling module be used for be inserted into it is described electronic
The cathode of the storage battery charging interface of vehicle charging unit connects, the output end of the battery voltage sampling module and photoelectrical coupler
The both ends of infrared light emission device connect.
As shown in Fig. 2, first signal processing module 11 includes：Fuse 11.1, the first decoupling unit 11.2, first
Rectification unit 11.3 and filter unit 11.4；
The first input end of one end connection alternating current of the fuse, the other end of the fuse are moved back with described first
The first input end of coupling unit connects, the second input terminal of the alternating current with it is described second defeated with the first decoupling unit
Enter end connection, the output end of the first decoupling unit is connect with the input terminal of first rectification unit, first rectification
The output end of unit is connect with the input terminal of the filter unit, and the output end of the filter unit is opened with the modulation module
Moved end connects.
Resistance R1 and R4 connect to form series arm in first decoupling unit 11.2, and series arm is in parallel with capacitance C1；The
Include a two phase commit bridge D1 in one rectification unit 11.3, capacitance C2, C3 and C4 are in parallel in filter unit 11.4.
As shown in figure 3, the modulation module 13 includes：Power supply control chip 13.1, buffer cell 13.2, perfusion unit
13.3 and switch unit 13.4；
The start end of the power supply control chip is the start end of the modulation module, the output of the power supply control chip
End is connect with the input terminal of the buffer cell, and the output end of the buffer cell is connect with the input terminal of the perfusion unit,
The output end of the perfusion unit is connect with the control terminal of the switch unit, and the output end of the switch unit is the modulation
The output end of module.
In practical applications, power supply control chip can be NCP1217, for the current duty cycle in control circuit, electricity
1st foot of source control chip is connect with E terminals, and the 2nd foot is connect with F terminals, and the 3rd foot is connect with G terminals, and the 4th foot connects with H terminals
It connecing, the 5th foot is connect with R8, and the 6th foot meets VCC+, and the 8th foot connects 300V driving voltages, in the first buffer cell, resistance R8 and three poles
Pipe Q1 is connected with the base stage of Q2, and the collector of Q1 connects VCC+, the emitter connection of emitter and Q2, collector and the I terminals of Q2
Connection, the cathode connection termination VCC+ of diode D4, the cathode connecting pin of diode D4 are also grounded after capacitance C8, and anode is even
It connects end to connect with the collector of triode Q1, the cathode connecting pin of diode D5 and the anode connection terminal of the diode Q4 connect
It connects, anode connection terminal ground connection, one end of resistance R9 is connect with the anode connection terminal of the diode D4, and the other end is with capacitance C9's
One end connects.
The primary side of transformer T1 is connect with the other end of capacitance C9 and ground wire respectively in perfusion unit, and transformer T1 is wherein
One secondary side is connected by resistance R12 and diode D6 in parallel with resistance R17, another secondary side is by resistance R13 in parallel
It is connect with diode D7 with resistance R18.
The grid of metal-oxide-semiconductor Q3 is connect with resistance R17 in switch unit, and resistance is connected between the grid and source electrode of metal-oxide-semiconductor Q3
The drain electrode of R21, metal-oxide-semiconductor Q3 are followed by 300V by resistance R93 and start voltage, and the emitter of Q3 connects J terminals, J terminals and main transformer pressure
First foot of device connects；The grid of metal-oxide-semiconductor Q4 is connect with resistance R18, and resistance R22 is connected between the grid and source electrode of metal-oxide-semiconductor Q4,
The drain electrode of metal-oxide-semiconductor Q4 is followed by starting voltage by diode D9, and the drain electrode of Q4 also connect with K terminals, K terminals and main transformer
3rd foot connects, and the source electrode of metal-oxide-semiconductor Q4 connect with one end of two resistance R24 and R25 in parallel, one end of R24 and R25 also with
The 6th foot of T1 connects, and the other end of the 6th foot of T1, R24 and R25 is also connect with D terminals, the source electrode of Q3 and the 1st of main transformer the
Foot connects, and the drain electrode of Q4 and the 3rd foot of main transformer connect.
R7 not belongs in modulation module 13 in Fig. 3, and the explanation about resistance R7 is see Examples hereinafter.
As shown in figure 4, the second signal processing module 15 includes：Second decoupling unit 15.1, the second rectification unit
15.2, inductance 15.3 and filter unit 15.4；
The input terminal of the second decoupling unit is connect with the first secondary side of the main transformer, the second decoupling unit
Output end connect with the input terminal of second rectification unit, the output end of second rectification unit and the one of the inductance
End connection, the other end of the inductance are with described, the input terminal connection of the filter unit, the output end of the filter unit
The output end of the second signal processing module.
Capacitance C11 connects with resistance R26, R27, R28 and R29 parallel with one another in second decoupling unit；Second rectification list
Member includes four rectifier diodes D10, D11, D13 and D14；The point both ends energy storage inductor L1 are respectively at the second rectification unit and filter
Wave unit connects；Two filter capacitors are parallel with one another in filter unit, and the positive connecting pin of D10 and D11 are connect with L terminals, the ends M
7th foot of son ground connection, L terminals and main transformer connects, and the 9th foot of M terminals and main transformer connects, and L1 is connect with filter unit
One end also connect with N-terminal, the anode of N-terminal and storage battery charging interface is connect.
As shown in figure 5, the battery voltage detection module 16 includes：First diode D18, first resistor R32, comparator
D17, the second comparator IC2, sample resistance R39, upper comparison resistance R38, triode Q5, second resistance R77,3rd resistor R36,
4th resistance R35, lower comparison resistance R76, the 5th resistance R72 and the 6th resistance R67；
The cathode connecting pin of the first diode D18 is connect with one end of first resistor R32, the first resistor R32
The other end connect with the anode connection terminal of the infrared light emission device of the photoelectrical coupler, the output of the first comparator
End is connect with the cathode connecting pin of the infrared light emission device, and the reference voltage input node of the first comparator connects
Ground, the control terminal of the first comparator respectively with one end of capacitance C16, one end of resistance R35, one end of resistance R36, resistance
One end of R37 is connected with one end of sampling resistor R39, and the other end of capacitance C16 and one end of resistance R34 connect, resistance R34
The other end is connect with the cathode (i.e. A terminals in figure) of infrared light emission device, is also connect with one end of resistance R33, resistance R33's
The other end is connect with the cathode connecting pin of diode D19, the positive connection termination power of D19, and the cathode of diode D18 and D19 connect
Connect end connection, the anode connection terminal of D18, the other end of resistance R35, resistance R37 the other end respectively with storage battery charging interface
Anode connection, anode connection N-terminal of storage battery charging interface, the other end of the 3rd resistor R36 are connect with O terminals；
The positive input terminal of the second comparator IC2 is connect with one end of upper comparison resistance R38, the upper comparison resistance
The anode of the other end and the storage battery charging interface of the other end of R38, the other end of the 4th resistance R35 and the 5th resistance
Connection, the other end of the sample resistance R39 are connect with the collector of triode Q5, the emitter ground connection of the triode Q5,
The base stage of the triode Q5 is connect with one end of the second resistance R77, the other end of the second resistance R77 and described the
The output end of two comparator IC2 connects, one end of the negative connecting pin of the second comparator IC2 and the lower comparison resistance R76
Connection, the other end of the lower comparison resistance R76 connect with P terminals, the negative connecting pin of the second comparator IC2 and described the
It being connect with power supply (12V) after five resistance R72 and the 6th resistance R67 series connection, power supply (12V) is connect with Q terminals, and the described 5th
Reference voltage output end is provided between resistance R72 and the 6th resistance R67；
The positive input terminal of second comparator is connected with resistance R40 with output end, and one end of resistance R77 also connects with resistance R41
It is grounded after connecing, the other end of resistance R77 is connect with the anode connection terminal of Light-emitting diode LED 7, cathode connecting pin and the electricity of LED7
One end connection of R79, the other end ground connection of R79 are hindered, the other end of R77 also connects with the cathode connecting pin of Light-emitting diode LED 6
Connect, the anode connection terminal of LED6 is connect with resistance R78 is followed by power supply, the negative input end of the second comparator also with resistance R72 one
End connection, the other end of resistance R72 are connect with one end of capacitance C24 respectively, the other end ground connection of capacitance C24, third comparator
The control terminal of D24 is connect with the other end of resistance R72, the output end of third comparator D24 respectively with C terminal and resistance R67
One end connects, and the reference voltage ground connection of third comparator D24, the other end of R67 is connect with 12V power supplys.
The battery voltage detection module that the utility model embodiment provides, which can recognize in electric motor vehicle cell box, includes
The quantity of battery, such as：It can recognize that in battery case to include 4 pieces of batteries (48V) or 5 pieces of batteries (60V), principle exists
In：Since first comparator provides the negative input end that reference voltage (2.5V) is input to the second comparator IC2, the comparison of battery is electric
Pressure is input to the positive input terminal of the second comparator IC2, and when including 4 pieces of batteries in battery case, the second comparator IC2 is just
The input voltage of input terminal is less than 2.5V, and the output end of the second comparator IC2 exports low level, triode Q5 cut-offs, sampling electricity
Resistance R39 is not turned on, and only 3rd resistor R36 is as lower comparison resistance R76；When including 5 pieces of batteries in battery case, second compares
The input voltage of the positive input terminal of device IC2 is higher than 2.5V, and the output end of the second comparator IC2 exports high level, and triode Q5 is led
Logical, sample resistance R39 conductings, being equivalent to lower comparison resistance R76 at this time is：3rd resistor R36+ sampling resistors；Upper comparison resistance
R38 is：The 5th resistance of 4th resistance R35+, in battery case include 4 pieces of batteries and 5 pieces of batteries when, lower comparison resistance R76 with it is upper
Ratio between comparison resistance R38 is different, therefore is capable of detecting when the quantity of the cell voltage in battery case and battery.
As shown in fig. 6, electric vehicle charging device further includes：Soft start unit 17.1, filter capacitor 17.2, integrating capacitor
17.3 and feedback resistance 17.4；
Two output ends of the soft start unit are connect with the both ends of the filter capacitor；
The both ends of the filter capacitor are connect with the both ends of the infrared light receiver part of the photoelectrical coupler respectively, described
One end of integrating capacitor is connect with one end of the infrared light receiver part, the other end of the integrating capacitor and the power supply control
The current sense input of coremaking piece connects, the current sense input of the power supply control chip also with one end of feedback resistance
Connection, the other end of the feedback resistance are connect with the output end of the perfusion unit.
Resistance R2 and resistance R3 series connection in soft start unit, capacitance C5 and resistance R3 are in parallel, the cathode connection of diode D2
End is connect with one end of capacitance C5, and anode connection terminal is intended to connect with filter capacitor C6 points one end, the other end of filter capacitor C6 with
And the other end ground connection of capacitance C5, the ends the E ground connection of infrared light receiver part, one end of C-terminal and C6 connect, C-terminal also with power supply control
2 feet of coremaking piece connect, the one end integrating capacitor C7 ground connection, the other end while 3 feet and feedback resistance with power supply control chip
One end of R7 connects, and the other end of R7 and the 6th foot of T1 connect, and one end of R6 is connect with E terminals, the other end ground connection of R6, D2
Positive connecting pin connect with F terminals, one end of C7 is connect with G terminals, and the other end of C7 is connect with H terminals and I terminals.
Current sampling information feeds back to the power supply control chip in modulation module by the receiving terminal of photoelectrical coupler, so as to
Power supply control chip adjusts duty ratio according to the current sampling information.
As shown in fig. 7, further including：Current detecting control unit 18；
The first input end of the current detecting control unit and the electricity for being inserted into the electric vehicle charging device
The anode connection of bottle charging interface, the second input termination reference voltage input of the current detecting unit, the electric current
The output end of detection control unit is connect with the cathode of the infrared light emission device of the photoelectrical coupler, in detection circuit
Electric current.
The first input end (i.e. B terminals in figure) of current detecting control unit is connect with resistance R45, and resistance R45 is compared with
The negative input end of device connects, and the positive input terminal of comparator is grounded after being connect with resistance R44, the positive input terminal of comparator also with resistance
Connect with the anode of storage battery charging interface after R47 connections, the negative input end of comparator also with concatenated capacitance C19 and resistance R50
It is connect with the output end of comparator after connection, the output end of comparator is connect with one end of resistance R53, the other end of resistance R53
It is connect with the cathode connecting pin of diode D20, the cathode of the anode connection terminal of D20 and infrared light emission device (ends A i.e. in figure
Son) connection.
R89, R90, R91 and R92 are current sampling resistor, this four resistance can also use an electricity in practical applications
Resistance substitutes, and when electric current passes through this four resistance in parallel, both end voltage is directly proportional to electric current, and voltage passes through B terminal (phases
When in detection current input terminal) it is transmitted to the negative input end of comparator in Fig. 6, C terminal connects reference voltage, and reference voltage passes through ratio
It is 10A to obtain current value compared with resistance R47, if current sampling resistor R89, R90, R91 and R92 detect that charging current is more than
10A, then the voltage reduction of the output end of comparator, duty ratio reduction, output power reduction, electric current reduce；If current sampling
Resistance R89, R90, R91 and R92 detect that charging current is less than 10A, then the voltage of the output end of comparator increases, and passes through the ends A
Son is exported to the light emitting diode of optical coupling isolator, and then passes to power supply control chip, and power supply control chip controls duty ratio
It increases, and then entire output power of circuit increases, charging current increases.
As shown in figure 8, further including：Electric current indicating unit 19；
The first input end of the electric current indicating unit is connect with reference voltage input, and the electric current instruction is single
Second input terminal of member is connect with the anode for being inserted into the storage battery charging interface of the electric vehicle charging device, for referring to
Show the charging current value detected.
The first input end (i.e. C terminal in figure) of electric current indicating unit is connect with one end of resistance R46, and resistance R46's is another
One end indicates that the positive input terminal of comparator is connect with the first electric current, and the other end of resistance R46 is connect with one end of capacitance C18, C18
The other end and the first electric current indicate that the negative input end of comparator connect, the other end of R46 and by resistance R82, R83, R84 and
The series circuit connection that R81 is constituted, the other end ground connection of series circuit, the anode (i.e. B terminals) and resistance of storage battery charging interface
One end of R80 connects, and the other end of resistance R80 indicates that the negative input end of comparator is connect with the 4th electric current, and resistance R80's is another
End is connect with one end of capacitance C25, and the other end ground connection of capacitance C25, the second electric current indicates the positive input terminal and resistance R82 of capacitance
Node connection between resistance R83, the first electric current indicate that the negative input end of comparator, the second electric current indicate the negative defeated of comparator
Enter the negative input end and the one of capacitance C25 that end, the negative input end of third electric current instruction comparator and the 4th electric current indicate comparator
The output end of end connection, the first electric current instruction comparator is connect with concatenated resistance R52 and Light-emitting diode LED 1, the second electric current
Indicate that the output end of comparator is connect with concatenated resistance R85 and Light-emitting diode LED 2, third electric current indicates the defeated of comparator
Outlet is connect with concatenated resistance R86 and Light-emitting diode LED 3, and the 4th electric current indicates the output end of comparator and concatenated electricity
Resistance R87 is connected with 4 light emitting diode of Light-emitting diode LED.
The a reference value of C terminal access, the charging that the access of B terminals is exported from R89, R90, R91 and R92 for current sampling resistor
Electric current, comparator are compared, and LED1, LED2, LED3 and LED4 are respectively used to show the different chargings detected from B terminals
Current value.
As shown in figure 9, further including：Charging state detection circuit 20；For whether determining storage battery according to charging current
It is full of；
The first input end of the charging state detection circuit and the electricity for being inserted into the electric vehicle charging device
The anode connection of bottle charging interface, the first input end of the charging state detection circuit connect with reference voltage input
It connects.
The first input end (the B terminals i.e. in figure) of charging state detection circuit is connect, resistance with one end of resistance R42
The other end of R42 and the positive input terminal of comparator connect, the second input terminal (C terminal i.e. in figure) of charging state detection circuit
It is connect with one end of resistance R43, capacitance C17, the other end of resistance R43 is connected between the other end and resistance R42 of resistance R43
It is also connect with one end of resistance R49, the other end of another end node of R49, resistance R42 is connect with one end of resistance R48, R48
The other end connect with one end of resistance R51, the other end of resistance R51 is connect with the cathode connecting pin of Light-emitting diode LED 5,
The anode connection terminal of LED5 connects power supply.
Since storage battery is in charging, charging current is gradually reduced, when charging current is reduced to predetermined threshold value, it is believed that electricity
Bottle is full of, and accesses charging current by B terminal input terminals, if charging current is less than predetermined threshold value, LED5 is lighted, for referring to
Show whether storage battery is full of.
As shown in Figure 10, further include radiating module 21, controlled for temperature；
The input terminal of the radiating module is connect with the second secondary side of the main transformer, the output end of the radiating module
For connecting radiator fan, the radiating module is used to cool down for the circuit.
The input terminal (C terminal i.e. in figure) of radiating module is connect with one end of resistance R59, the other end of resistance R58 with
The positive input terminal of comparator connects, and also connect with one end of resistance R59, and the other end of R59 is grounded, one end of R59 also with capacitance
One end of C23 connects, and the other end of C23 and the negative input end of comparator connect, and the input terminal of radiating module is also with resistance R61's
One end connects, and the other end of R61 is grounded after connecting with resistance R62 and thermistor R63, the other end of resistance R58 also with resistance
One end of R64 connects, and the other end of resistance R64 and the output end of comparator connect, and are also connect with one end of resistance R65, resistance
The other end of R65 is connect with the base stage of triode Q7, and the emitter of Q7 is connect with Q terminals, P terminals and U terminals with 12V power supplys
Connection, the collector of Q7 are connect with fan socket, and fan socket also connects with the cathode of one end of capacitance C12, diode D12 respectively
End connection is connect, the other end of capacitance C12 is connect with R terminals, and the cathode output end of diode D12 is connect with one end of resistance R30,
The other end of resistance R30 is connect with V terminals, the connection of the 11st foot of the V terminals and main transformer, the other end of R30 also with electricity
One end connection of R31 is hindered, the other end of R31 is connect with the anode connection terminal of diode D15, the cathode connecting pin of D15 and capacitance
One end of C13 connects, and the other end of C13 is connect with R terminals.
If thermistor R63 detects that temperature is less than preset temperature threshold (such as 45 degrees Celsius), Q7 is not turned on, and is used for
The interface 2P power-off of fan is accessed, fan does not work；If temperature is higher than preset temperature threshold, Q7 conductings, fan work.
Figure 11 is protection circuit 22；One end of resistance R68 is connect with U terminals in protection circuit, the other end of R68 respectively with
One end of charging resistor R69, one end of R70, one end of R71, triode Q11 collector and elegant diode DW2 cathode
Connecting pin connects, and the other end of charging resistor R69 connect with the grid of metal-oxide-semiconductor Q8, connected between the grid and drain electrode of metal-oxide-semiconductor Q8
There are resistance R73, the other end of charging resistor R70 to be connect with the grid of metal-oxide-semiconductor Q9, is connected between the grid and drain electrode of metal-oxide-semiconductor Q9
There are resistance R74, the other end of charging resistor R71 to be connect with the grid of metal-oxide-semiconductor Q10, connects between the grid and drain electrode of metal-oxide-semiconductor Q10
The source electrode for being connected to resistance R75, Q8, Q9 and Q10 is connect with the anode of storage battery charging interface (B terminals) respectively, Q8, Q9 and Q10's
Drain electrode is connect with the cathode of storage battery charging interface respectively, and one end of resistance R66 is connect with the cathode of storage battery charging interface, the other end
It is connect with one end of resistance R88, the other end ground connection of resistance R88, between the base stage and resistance R66 and resistance R88 of triode Q11
Node connection, and also connect with one end of capacitance C26, the other end of capacitance C26 is grounded, and the emitter of Q11, DW2 are just
Pole connecting pin is grounded respectively, one end of the parallel circuit of current sampling resistor R89, R90, R91 and R92 composition and storage battery charging
Anode (B terminals) connection of mouth, other end ground connection.
The source electrode of metal-oxide-semiconductor is fed back to by charging resistor R69, R70 and R71, the charging current of metal-oxide-semiconductor output is fed back to
Q11, if charging current is more than predetermined current secure threshold, voltage is more than the conduction value of the emitter junction of Q11, the then transmitting of Q11
Knot conducting, then disconnect circuit where the cathode of storage battery charging interface, stops charging.
Figure 12 is power generation circuit, and for generating VCC+, one end of resistance R60 is connect with Y terminals, Y terminals and main transformer
6th foot of depressor connects, and the other end of R60 is connect with the anode connection terminal of diode D23, the cathode connecting pin of D23 respectively with
One end of resistance R57 is connected with one end of capacitance C22, and the other end ground connection of capacitance C22, the other end of R57 is with triode Q6's
Collector connects, and the one end of the emitter of diode D22, Q6 also with resistance R56 is connected between the collector and emitter of Q6
Connection, another termination VCC+ of R56, be connected between the base stage and emitter of Q6 the base stage of diode D21, Q6 also with resistance
One end of R55 connects, and the other end of R55 connects with one end of resistance R54, zener diode DW1's and capacitance C20's one end respectively
Connect, the other end ground connection of the other end of C20 and DW1, the other end of R54 and one end of R57 connect, C21 be connected to GND ground wires and
Between VCC+.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
It with the specific work process of device, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In addition, in the description of the utility model embodiment unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, can also be electrical connection；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned term with concrete condition
Concrete meaning in the present invention.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer read/write memory medium.Based on this understanding, the technical solution of the utility model substantially or
Person says that the part of the part that contributes to existing technology or the technical solution can be expressed in the form of software products,
The computer software product is stored in a storage medium, including some instructions are used so that computer equipment (can be with
Personal computer, server or the network equipment etc.) execute each embodiment the method for the utility model whole or portion
Step by step.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), with
Machine accesses various Jie that can store program code such as memory (RAM, Random Access Memory), magnetic disc or CD
Matter.
It is in the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
The utility model and simplifying describes for ease of description, do not indicate or imply the indicated device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for description purposes only, and are not understood to indicate or imply relative importance.
Finally it should be noted that：Embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical solution of utility model, rather than its limitations, the scope of protection of the utility model is not limited thereto, although with reference to aforementioned
The utility model is described in detail in embodiment, it will be understood by those of ordinary skill in the art that：It is any to be familiar with this skill
The technical staff in art field within the technical scope disclosed by the utility model, still can be to the skill recorded in previous embodiment
Art scheme modify or can readily occur in variation or equivalent replacement of some of the technical features；And these modifications,
Variation is replaced, the spirit and model of the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
It encloses, should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model is answered described is wanted with right
Subject to the protection domain asked.
Claims (10)
1. a kind of electric vehicle charging device, which is characterized in that including：First signal processing module, photoelectrical coupler, modulation mould
Block, main transformer, second signal processing module and battery voltage detection module；
The output end of first signal processing module is connect with the start end of the modulation module, for being the modulation module
It provides and starts voltage；
The output end of the modulation module is connect with the primary side of the main transformer, for for by input voltage signal be modulated into
The high-frequency voltage signal that the primary side of the main transformer matches, peak point current setting end and the photoelectricity of the modulation module
The infrared light receiver part of coupler connects；
The secondary side of the first of the main transformer is connect with the input terminal of the second signal processing module, the second signal processing
The output end of module is connect with the input terminal of the battery voltage sampling module；
The cathode power supply input terminal of the battery voltage sampling module is filled with the storage battery for being inserted into the electric vehicle charging device
The anode connection of electrical interface, the negative power supply input terminal of the battery voltage sampling module charge with for being inserted into the electric vehicle
The cathode of the storage battery charging interface of device connects, the infrared light of the output end and photoelectrical coupler of the battery voltage sampling module
The both ends of ballistic device connect.
2. electric vehicle charging device according to claim 1, which is characterized in that first signal processing module includes：
Fuse, the first decoupling unit, the first rectification unit and filter unit；
The first input end of one end connection alternating current of the fuse, the other end of the fuse and the first decoupling list
The first input end connection of member, the second input terminal of the alternating current and second input terminal with the first decoupling unit
Connection, the output end of the first decoupling unit are connect with the input terminal of first rectification unit, first rectification unit
Output end connect with the input terminal of the filter unit, the start end of the output end of the filter unit and the modulation module
Connection.
3. electric vehicle charging device according to claim 2, which is characterized in that the modulation module includes：Power supply controls
Chip, buffer cell, isolating transformer, the first perfusion unit and the second perfusion unit；
The start end of the power supply control chip be the modulation module start end, the output end of the power supply control chip with
The input terminal of the buffer cell connects, and the output end of the buffer cell is connect with the primary side of the isolating transformer, described
First secondary side of isolating transformer connect with the input terminal of the first perfusion unit, the second pair side of the isolating transformer and
The input terminal of the second perfusion power supply connects.
4. electric vehicle charging device according to claim 3, which is characterized in that further include：Soft start unit, filtered electrical
Appearance, integrating capacitor and feedback resistance；
Two output ends of the soft start unit are connect with the both ends of the filter capacitor；
The both ends of the filter capacitor are connect with the both ends of the infrared light receiver part of the photoelectrical coupler respectively, the integral
One end of capacitance is connect with one end of the infrared light receiver part, and the other end of the integrating capacitor controls core with the power supply
The current sense input of piece connects, and the current sense input of the power supply control chip also connects with one end of feedback resistance
It connects, the other end of the feedback resistance is connect with the output end of the perfusion unit.
5. electric vehicle charging device according to claim 4, which is characterized in that the second signal processing module includes：
Second decoupling unit, the second rectification unit, inductance and filter unit；
The secondary side of the first of the input terminal of the second decoupling unit and the main transformer is connect, the second decoupling unit it is defeated
Outlet is connect with the input terminal of second rectification unit, and the output end of second rectification unit connects with one end of the inductance
Connect, the other end of the inductance with it is described, the input terminal of the filter unit connects, and the output end of the filter unit is described
The output end of second signal processing module.
6. electric vehicle charging device according to claim 5, which is characterized in that the battery voltage detection module includes：
First diode, first resistor, first comparator, the second comparator, sample resistance, upper comparison resistance, triode, the second electricity
Resistance, 3rd resistor, the 4th resistance, lower comparison resistance, the 5th resistance and the 6th resistance；
The cathode connecting pin of first diode and one end of first resistor connect, the other end of the first resistor with it is described
The anode connection terminal of the infrared light emission device of photoelectrical coupler connects, the output end of the first comparator and the infrared light
The cathode connecting pin of ballistic device connects, the reference voltage input node of the first comparator, the first comparator
Control terminal respectively with the positive input terminal of second comparator, one end of sample resistance, one end of the 3rd resistor, the 4th electricity
One end connection of one end of resistance, the 5th resistance, the other end ground connection of the 3rd resistor；
The positive input terminal of second comparator is connect with one end of upper comparison resistance, the other end of the upper comparison resistance, institute
It states the other end of the 4th resistance and the other end of the 5th resistance and the positive of the storage battery charging interface connect, the sample resistance
The other end and the collector of triode connect, the emitter of triode ground connection, the base stage of the triode and described the
One end of two resistance connects, and the other end of the second resistance is connect with the output end of second comparator, second ratio
It is connect with one end of the lower comparison resistance compared with the negative connecting pin of device, the other end ground connection of the lower comparison resistance, described second
It is connect with power supply after the negative connecting pin of comparator and the 5th resistance and the 6th resistance series connection, the 5th resistance and the
Reference voltage output end is provided between six resistance.
7. electric vehicle charging device according to claim 6, which is characterized in that further include：Current detecting control unit；
The first input end of the current detecting control unit is filled with the storage battery for being inserted into the electric vehicle charging device
The anode connection of electrical interface, the second input termination reference voltage input of the current detecting unit, the current detecting
The output end of control unit is connect with the cathode of the infrared light emission device of the photoelectrical coupler.
8. electric vehicle charging device according to claim 7, which is characterized in that further include：Electric current indicating unit；
The first input end of the electric current indicating unit is connect with reference voltage input, the electric current indicating unit
Second input terminal is connect with the anode for being inserted into the storage battery charging interface of the electric vehicle charging device.
9. electric vehicle charging device according to claim 8, which is characterized in that further include：Charging state detection circuit；
The first input end of the charging state detection circuit is filled with the storage battery for being inserted into the electric vehicle charging device
The anode connection of electrical interface, the first input end of the charging state detection circuit are connect with reference voltage input.
10. electric vehicle charging device according to claim 9, which is characterized in that further include radiating module；
The input terminal of the radiating module is connect with the second secondary side of the main transformer, and the output end of the radiating module is used for
Radiator fan is connected, the radiating module is used to cool down for the circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820303046.4U CN208046264U (en) | 2018-03-05 | 2018-03-05 | Electric vehicle charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820303046.4U CN208046264U (en) | 2018-03-05 | 2018-03-05 | Electric vehicle charging device |
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| Publication Number | Publication Date |
|---|---|
| CN208046264U true CN208046264U (en) | 2018-11-02 |
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ID=63950511
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820303046.4U Active CN208046264U (en) | 2018-03-05 | 2018-03-05 | Electric vehicle charging device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261253A (en) * | 2019-06-26 | 2019-09-20 | 濮阳市立圆汽车电器有限公司 | A kind of bending property testing device of automobile charger interface |
-
2018
- 2018-03-05 CN CN201820303046.4U patent/CN208046264U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261253A (en) * | 2019-06-26 | 2019-09-20 | 濮阳市立圆汽车电器有限公司 | A kind of bending property testing device of automobile charger interface |
| CN110261253B (en) * | 2019-06-26 | 2021-11-02 | 濮阳市立圆汽车电器有限公司 | Bending performance testing device of automobile charger interface |
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