CN205846816U - The charging device of Household electric motor car - Google Patents
The charging device of Household electric motor car Download PDFInfo
- Publication number
- CN205846816U CN205846816U CN201620821110.9U CN201620821110U CN205846816U CN 205846816 U CN205846816 U CN 205846816U CN 201620821110 U CN201620821110 U CN 201620821110U CN 205846816 U CN205846816 U CN 205846816U
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- electric motor
- accumulator
- motor car
- series
- charging device
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 42
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000002955 isolation Methods 0.000 claims description 17
- 230000002265 prevention Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 9
- 239000003990 capacitor Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010034133 Pathogen resistance Diseases 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
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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
- Y02T10/72—Electric energy management in electromobility
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The utility model discloses the charging device of a kind of Household electric motor car, including rectification module, filtration module, charging inlet, accumulator battery and series-parallel conversion module；Electrical network is charged to electric motor car by rectification module, filtration module and charging inlet output electric energy, and is connected with accumulator battery by series-parallel conversion module and is charged；Accumulator battery provides charge power supply to electric motor car；Series-parallel conversion module is by the accumulator charged in parallel in accumulator battery, or series connection is charged to electric motor car.This utility model makes accumulator in parallel when charging, it is achieved do not use boost module to charge accumulator, and allows accumulator series boosting during to electric vehicle quick charge, it is achieved the quick charge of electric motor car；This utility model have employed all kinds of protection module, it is ensured that the safe and stable operation of charging device；Use time block, it is achieved that the timing operation of charging device, use convenient；Electric motor car can quickly be charged by this utility model, and circuit is simple and reliable, and stability is high.
Description
Technical field
This utility model is specifically related to the charging device of a kind of Household electric motor car.
Background technology
Along with the development of China's economic technology, environmental problem also becomes increasingly conspicuous, and the environmental consciousness of people is the most increasingly
By force.
Electric energy is as the most important secondary energy sources in the world now, because it has cleaning, feature that is reliable and that easily obtain,
Become one of first-selected energy of future world development.Electric motor car is as the vehicles of purely use electric energy, and it has noise
The advantages such as little, zero-emission, the most widely available at world's every country.
At present, owing to resident's electrical network supply load limits, family's charging pile of electric motor car typically uses 220V to exchange at a slow speed
Charging modes, charging current is not more than 16A, and charge power is about 3.5kW.Owing to charging process exists unavoidable loss,
Electric motor car to a 30kWh is charged, and the charging interval is up to 10 hours.Therefore, the charging interval long has had become as system
About one of electric motor car or the widely available bottleneck of pure electrokinetic technique.
Utility model content
The purpose of this utility model is to provide filling of a kind of Household electric motor car quickly can being charged electric motor car
Electric installation.
The charging device of this Household electric motor car that this utility model provides, including rectification module, filtration module and charging
Interface, also includes accumulator battery and series-parallel conversion module；Electric network source by after rectification module and filtration module, output straight
Stream electric energy is divided into two-way, and series-parallel conversion module of leading up to is connected with accumulator battery and to battery charging, another a-road-through
Overcharge interface charges to electric motor car；Accumulator battery includes at least two accumulator, to electric motor car when being used for needing quick charge
Charge power supply is provided；Series-parallel conversion module when accumulator battery is in charged state by accumulator battery with parallel connection connect with
It is easy to accumulator charging, and when accumulator battery is in discharge condition, accumulator battery is connected so that accumulator with series connection
Charge to electric motor car.
The charging device of described Household electric motor car also includes isolation module；Before isolation module is serially connected in charging inlet,
Filtration module and series-parallel conversion module are all connected with charging inlet by isolation module；Isolation module is used for isolating electric network source
Part and accumulator battery power pack, it is ensured that electric network source and the safety of accumulator battery power supply；Isolation module is additionally operable to isolation electricity
Source part and electric motor car, for ensureing the safety that electric motor car charging uses.
Described isolation module is mechanical switch.
Described series-parallel conversion module includes tandem tap, paralleling switch and controller；Tandem tap is for by electric power storage
All accumulator of Chi Zuzhong are connected to concatenation state；Paralleling switch is for being connected to all accumulator in accumulator battery also
Connection state；Controller drives signal to control turning on and off of tandem tap and paralleling switch for producing.
Described series-parallel conversion module also includes temperature sensor；Temperature sensor is connected with controller, is used for measuring
The temperature of accumulator battery, and the incoming controller of temperature information that will measure.
Described series-parallel conversion module also includes overcharging/Cross prevention chip；Overcharge/Cross prevention chip and accumulator
Group connects, for detecting the charge/discharge state of accumulator battery, it is ensured that accumulator battery will not overcharge/cross and put.
Described series-parallel conversion module also includes input/output circuitry；Input/output circuitry is connected with controller, uses
In the state parameter of the charging device externally showing described Household electric motor car, or for receiving, described Household electric motor car is filled
Electric installation carries out parameter setting.
Described tandem tap and paralleling switch and the connection of accumulator in accumulator battery, specially tandem tap has N-1
Individual, it is connected between the negative pole of the i-th-1 accumulator and the positive pole of i-th accumulator, paralleling switch has 2N-2, respectively
It is connected between the positive pole of the i-th-1 accumulator and the positive pole of i-th accumulator；During wherein N is accumulator battery, accumulator is individual
Number；The value of i is the natural number between 2 ~ N.
Described series-parallel conversion module also includes series-parallel conversion interlock protection circuit；Series-parallel conversion interlock protection electricity
Road is connected between controller and tandem tap, paralleling switch, and series-parallel conversion interlock protection circuit is used for passing through logical interlock
Mode ensure that tandem tap and paralleling switch cannot be also turned on.
Described series-parallel conversion interlock protection circuit includes NAND gate and photoelectrical coupler；The series connection that controller sends is left
Close control signal by NAND gate reversely after, directly driven tandem tap action by photoelectrical coupler；Reverse by NAND gate
After series switching control signals be simultaneously connected to the first input end of NAND gate of paralleling switch control signal, paralleling switch control
Second input of the NAND gate of signal processed connects the paralleling switch control signal that sends of controller, paralleling switch control signal with
By NAND gate series switching control signals after reverse by NAND gate, more directly drive paralleling switch by photoelectrical coupler
Action.
Described series-parallel conversion module also includes timing circuit；Timing circuit is connected with controller, is used for arranging described
Automatically starting and the self-braking time of the charging device of Household electric motor car, and the time incoming controller that will arrange, control
Device controls described charging device according to the time arranged and automatically starts or stops.
Described timing circuit is to include RTC clock chip DS1302 and the timing circuit of eeprom chip 24LC64；RTC
Clock chip DS1302 is for safeguarding the time of system, and eeprom chip 24LC64 is for preserving the timing of setting.
The model of described controller is MC9S08AW32.
Described overcharge/model of Cross prevention chip is S-8241.
The model of described temperature sensor is LM35.
The charging device of this Household electric motor car that this utility model provides, achieves accumulator by series parallel switch
Series-parallel conversion, allows accumulator in parallel when accumulator is charged, it is achieved do not use boost module to charge accumulator, and at needs
Accumulator is allowed to be connected in series during to electric vehicle quick charge, it is achieved accumulator battery boost charge, it is ensured that quickly filling of electric motor car
Electricity；Additionally, this utility model have employed all kinds of protection module, it is ensured that the safety and stability fortune of the charging device of Household electric motor car
OK；Use time block, it is achieved that the timing operation of charging device, use convenient；This utility model achieves the most right
The function that electric motor car is charged, and circuit is simple and reliable, and stability is high.
Accompanying drawing explanation
Fig. 1 is functional block diagram of the present utility model.
Fig. 2 is the functional block diagram of a kind of embodiment of the present utility model.
Fig. 3 is the connection diagram that accumulator battery of the present utility model is connected with series parallel switch.
Fig. 4 is the circuit theory diagrams of a kind of embodiment of series-parallel conversion interlock protection circuit of the present utility model.
Fig. 5 is the circuit theory diagrams of a kind of embodiment of timing circuit of the present utility model.
Detailed description of the invention
It it is functional block diagram of the present utility model as depicted in figs. 1 and 2: this Household electric motor car that this utility model provides
Charging device, including rectification module, filtration module, accumulator battery, series-parallel conversion module and isolation module；Electric network source leads to
After over commutation module and filtration module, filled to electric motor car by isolation module (preferably employing mechanical switch) DC power output
Electricity, is connected with accumulator battery, to battery charging also by isolation module, series-parallel conversion module simultaneously；Accumulator battery bag
Include at least two accumulator, be used for needing during quick charge providing charge power supply to electric motor car；Series-parallel conversion module is in electric power storage
When pond group is in charged state, accumulator battery is connected with parallel connection so that accumulator is charged, and be in accumulator battery and put
During electricity condition, accumulator battery is connected with series connection so that accumulator is charged to electric motor car；Isolation module is serially connected in filtering mould
Between block and series-parallel conversion module, it is used for isolating electric network source part and accumulator battery power pack, it is ensured that two power supplys are each
From safety.
Series-parallel conversion module includes tandem tap, paralleling switch, controller, temperature sensor, overcharges/Cross prevention core
Sheet, input/output circuitry, series-parallel conversion interlock protection circuit and timing circuit；Tandem tap is for by accumulator battery
All accumulator are connected to concatenation state；Paralleling switch is for being connected to parallel connection by all accumulator in accumulator battery；
Controller drives signal to control turning on and off of tandem tap and paralleling switch for producing；Temperature sensor is with controller even
Connect, for measuring the temperature of accumulator battery, and the incoming controller of temperature information that will measure；Overcharge/Cross prevention chip and storage
Set of cells connects, for detecting the charge/discharge state of accumulator battery, it is ensured that accumulator battery will not overcharge/cross and put；Input/defeated
Go out circuit to be connected with controller, for externally showing the state parameter of the charging device of described Household electric motor car, or be used for connecing
Receive the charging device to described Household electric motor car and carry out parameter setting；Series-parallel conversion interlock protection circuit be connected to controller with
Between tandem tap, paralleling switch, series-parallel conversion interlock protection circuit is for ensureing that by the way of logical interlock series connection is opened
Close and paralleling switch cannot be also turned on；Timing circuit is connected with controller, for arranging the charging dress of described Household electric motor car
That puts starts and the self-braking time automatically, and the time incoming controller that will arrange, and controller is according to the time control arranged
Make described charging device automatically to start or stop.
The model of controller is MC9S08AW32.Overcharge/model of Cross prevention chip is S-8241.Temperature sensor
Model is LM35.Tandem tap and paralleling switch can use relay, IGBT, audion or MOSFET etc. to have and open and close
The switch of disconnected function.
It is illustrated in figure 3 the connection diagram that accumulator battery of the present utility model is connected with series parallel switch: electric power storage in figure
Pond group has N platform accumulator, and in figure, label is divided into other B-1, B-2, B-3 ..., B-N；Figure breaker in middle K1 is disconnecting switch；Figure
In be numbered S-2, the switch of S-4 ... S-(2N-2) is tandem tap, is numbered S-1, S-3, S-5, S-7 ... S-in figure
(4N-7) switch with S-(4N-5) is paralleling switch.As can be seen: when paralleling switch all closes and tandem tap is complete
When portion disconnects, the N platform accumulator in figure is parallel connection, and now N platform accumulator is in charged state, and electrical network fills to accumulator
Electricity, owing to N platform accumulator is in parallel connection, therefore the electric network source after over commutation need not boost module can be to N platform
Accumulator is charged simultaneously；When tandem tap all closes and paralleling switch is all off, the N platform accumulator in figure all concatenates
Together, the accumulator battery that now N platform accumulator is constituted is in discharge condition, for charging to electric motor car, due to N platform accumulator
Being in series connection, therefore the port voltage of accumulator battery is higher, it is possible to realize the high-voltage high-speed charging of electric motor car.
It is illustrated in figure 4 the circuit theory of a kind of embodiment of series-parallel conversion interlock protection circuit of the present utility model
Figure: series-parallel conversion interlock protection circuit includes NAND gate and photoelectrical coupler；In figure, U2, U4, U6 are NAND gate；S2_MCU is
The series switching control signals that controller sends, S1_MCU and S3_MCU is the paralleling switch control signal that controller sends；Control
The series switching control signals S2_MCU that device processed sends is simultaneously connected with two inputs of NAND gate U4, reverse by NAND gate U4
After, by photoelectrical coupler (indicating U3 in figure), (switch that the present embodiment uses is relay, in figure directly to drive tandem tap
Indicate RL2) action；By NAND gate reversely after series switching control signals be simultaneously connected to paralleling switch control signal with
The first input end of not gate U2 and U6, the second input of the NAND gate of paralleling switch control signal connects controller and sends also
Connection switch controlling signal S1_MCU and S3_MCU, paralleling switch control signal with by NAND gate reversely after tandem tap control
Signal passes through NAND gate, more directly drives paralleling switch action by photoelectrical coupler U1 and U5；Figure indicates D1, D2, D3
Diode is fly-wheel diode, and effect is when relay control coil is become cut-off by conducting, provides afterflow for control coil
Loop, prevents coil-induced electromotive force from raising, punctures loop；Optocoupler can select Darlington transistor to export optocoupler 4N35.
Can obtain final switching signal S1 by circuit diagram, S2 and S3 is: S2=S2_MCU, S1=S1_MCU& (-S2_
MCU), S3=S3_MCU& (-S2_MCU)；If it can therefore be appreciated that S2_MCU is high level, the most no matter S1_MCU and S3_MCU is
High level or low level, the switch controlling signal finally given is S1=S3=0, S2=1, it is achieved thereby that series parallel switch pipe
Driving conversion signal interlocking.
It is illustrated in figure 5 the circuit theory diagrams of a kind of embodiment of the timing circuit of utility model: timing circuit is for including
RTC clock chip DS1302 and the timing circuit of eeprom chip 24LC64；RTC clock chip DS1302 is for safeguarding system
Time, eeprom chip 24LC64 is for preserving the timing of setting.
Concrete, controller uses model to be the controller of MC9S08AW32, and the 22 of chip, 44 and 54 pins connect electricity
Source；21,59,45 and 55 pins are directly grounded；57 and 58 pins of chip connect by resistance R10, crystal oscillator Y2, resistance R14 and filter
The benchmark crystal oscillating circuit of ripple electric capacity C3, C4 composition；3 feet of chip, for restarting pin, connect power supply by pull-up resistor R15, simultaneously
By filter capacitor C5 ground connection；33,34 and 35 pins are connected with 5,6 and 7 feet of eeprom chip 24LC64 respectively, also lead to simultaneously
Cross respective pull-up resistor (R11, R12 and R13) to be connected with power supply；39 feet and the I/O pin (No. 6 of RTC clock chip DS1302
Pin) connect, 42,43 pins are connected, simultaneously also by respective pull-up resistor with 5 feet, 7 feet of RTC clock chip DS1302
(R7 and R8) is connected with power supply；1 ~ 4 foot of eeprom chip 24LC64 is all connected to ground, and 8 feet are connected with power supply, simultaneously also by
Filter capacitor C2 is connected to ground；1 foot of RTC clock chip DS1302 is connected with power supply, also by filter capacitor C1 ground connection, the most logical
Cross resistance R9 and 6 feet connect；8 feet are connected by battery BT1；Crystal oscillator Y1 is connected between 2 feet and 3 feet.
Claims (15)
1. a charging device for Household electric motor car, including rectification module, filtration module and charging inlet, it is characterised in that also wrap
Include accumulator battery and series-parallel conversion module；After electric network source is by rectification module and filtration module, DC power output is divided into
Two-way, series-parallel conversion module of leading up to is connected with accumulator battery and to battery charging, separately leads up to charging inlet
Charge to electric motor car；Accumulator battery includes at least two accumulator, is used for needing during quick charge providing charged electrical to electric motor car
Source；Accumulator battery is connected so that accumulator with parallel connection by series-parallel conversion module when accumulator battery is in charged state
Charging, and when accumulator battery is in discharge condition, accumulator battery is connected so that accumulator is filled to electric motor car with series connection
Electricity.
The charging device of Household electric motor car the most according to claim 1, it is characterised in that filling of described Household electric motor car
Electric installation also includes isolation module；Before isolation module is serially connected in charging inlet, filtration module and series-parallel conversion module are the most logical
Cross isolation module to be connected with charging inlet；Isolation module is used for isolating electric network source part and accumulator battery power pack, it is ensured that
Electric network source and the safety of accumulator battery power supply；Isolation module is additionally operable to insulating power supply part and electric motor car, it is ensured that electric motor car and
Make the safety of employment.
The charging device of Household electric motor car the most according to claim 2, it is characterised in that described isolation module is machinery
Switch.
4. according to the charging device of the Household electric motor car one of claim 1 ~ 3 Suo Shu, it is characterised in that described connection in series-parallel turns
Die change block includes tandem tap, paralleling switch and controller；Tandem tap is for connecting all accumulator in accumulator battery
In concatenation state；Paralleling switch is for being connected to parallel connection by all accumulator in accumulator battery；Controller is used for producing
Signal is driven to control turning on and off of tandem tap and paralleling switch.
The charging device of Household electric motor car the most according to claim 4, it is characterised in that described series-parallel conversion module
Also include temperature sensor；Temperature sensor is connected with controller, for measuring the temperature of accumulator battery, and the temperature that will measure
The incoming controller of information.
6. according to the charging device of the Household electric motor car one of claim 1 ~ 3 Suo Shu, it is characterised in that described connection in series-parallel turns
Die change block also includes overcharging/Cross prevention chip；Overcharge/Cross prevention chip is connected with accumulator battery, it is used for detecting accumulator
The charge/discharge state of group, it is ensured that accumulator battery will not overcharge/cross and put.
The charging device of Household electric motor car the most according to claim 4, it is characterised in that described series-parallel conversion module
Also include input/output circuitry；Input/output circuitry is connected with controller, for externally showing filling of described Household electric motor car
The state parameter of electric installation, or carry out parameter setting for receiving the charging device to described Household electric motor car.
The charging device of Household electric motor car the most according to claim 4, it is characterised in that described tandem tap and parallel connection
Switch has N-1 with the connection of accumulator, specially tandem tap in accumulator battery, is connected to the i-th-1 accumulator
Between the positive pole of negative pole and i-th accumulator, paralleling switch has 2N-2, is connected to the positive pole pole of the i-th-1 accumulator
And between the positive pole of i-th accumulator；The number of accumulator during wherein N is accumulator battery；The value of i is the nature between 2 ~ N
Number.
The charging device of Household electric motor car the most according to claim 4, it is characterised in that described series-parallel conversion module
Also include series-parallel conversion interlock protection circuit；Series-parallel conversion interlock protection circuit be connected to controller and tandem tap and
Between connection switch, series-parallel conversion interlock protection circuit is for ensureing tandem tap and paralleling switch by the way of logical interlock
Cannot be also turned on.
The charging device of Household electric motor car the most according to claim 9, it is characterised in that described series-parallel conversion interlocking
Protection circuit includes NAND gate and photoelectrical coupler；The series switching control signals that controller sends by NAND gate reversely after,
Tandem tap action is directly driven by photoelectrical coupler；It is simultaneously connected with by NAND gate series switching control signals after reverse
To the first input end of the NAND gate of paralleling switch control signal, the second input of the NAND gate of paralleling switch control signal is even
Connect the paralleling switch control signal that controller sends, paralleling switch control signal with by NAND gate reversely after tandem tap control
Signal processed passes through NAND gate, more directly drives paralleling switch action by photoelectrical coupler.
The charging device of 11. Household electric motor cars according to claim 4, it is characterised in that described series-parallel conversion module
Also include timing circuit；Timing circuit is connected with controller, for arranging automatically opening of the charging device of described Household electric motor car
Move and the self-braking time, and the time incoming controller that will arrange, controller controls described charging according to the time arranged
Device starts or stops automatically.
The charging device of 12. Household electric motor cars according to claim 11, it is characterised in that described timing circuit is bag
Include RTC clock chip DS1302 and the timing circuit of eeprom chip 24LC64；RTC clock chip DS1302 is used for safeguarding system
Time, eeprom chip 24LC64 is for preserving the timing of setting.
The charging device of 13. Household electric motor cars according to claim 4, it is characterised in that the model of described controller is
MC9S08AW32。
The charging device of 14. Household electric motor cars according to claim 5, it is characterised in that the type of described temperature sensor
Number it is LM35.
The charging device of 15. Household electric motor cars according to claim 6, it is characterised in that described overcharges/Cross prevention
The model of chip is S-8241.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620821110.9U CN205846816U (en) | 2016-08-01 | 2016-08-01 | The charging device of Household electric motor car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620821110.9U CN205846816U (en) | 2016-08-01 | 2016-08-01 | The charging device of Household electric motor car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205846816U true CN205846816U (en) | 2016-12-28 |
Family
ID=57617841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620821110.9U Active CN205846816U (en) | 2016-08-01 | 2016-08-01 | The charging device of Household electric motor car |
Country Status (1)
| Country | Link |
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| CN (1) | CN205846816U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160145A (en) * | 2016-08-01 | 2016-11-23 | 国家电网公司 | The charging device of Household electric motor car |
| CN107415731A (en) * | 2017-07-14 | 2017-12-01 | 烟台南山学院 | A kind of electric automobile multichannel quick charge device based on PLC controls |
-
2016
- 2016-08-01 CN CN201620821110.9U patent/CN205846816U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160145A (en) * | 2016-08-01 | 2016-11-23 | 国家电网公司 | The charging device of Household electric motor car |
| CN107415731A (en) * | 2017-07-14 | 2017-12-01 | 烟台南山学院 | A kind of electric automobile multichannel quick charge device based on PLC controls |
| CN107415731B (en) * | 2017-07-14 | 2020-02-04 | 烟台南山学院 | Electric automobile multi-path quick charging device based on programmable logic controller control |
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