CN105846521A - Electric automobile intelligent charging pile system control method - Google Patents
Electric automobile intelligent charging pile system control method Download PDFInfo
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- CN105846521A CN105846521A CN201610316364.XA CN201610316364A CN105846521A CN 105846521 A CN105846521 A CN 105846521A CN 201610316364 A CN201610316364 A CN 201610316364A CN 105846521 A CN105846521 A CN 105846521A
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- 238000007600 charging Methods 0.000 title claims abstract description 155
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000001514 detection method Methods 0.000 claims description 7
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- BNOODXBBXFZASF-UHFFFAOYSA-N [Na].[S] Chemical compound [Na].[S] BNOODXBBXFZASF-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
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- 239000000446 fuel Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- H02J7/0077—
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- H02J7/0091—
Abstract
The invention discloses an electric automobile intelligent charging pile system control method. An electric automobile intelligent charging pile system comprises 4 AC/DC units and 4 charging cases, wherein an input end of each AC/DC unit is connected with a power grid, and output ends of the AC/DC units are connected with input ends of the charging cases; the electric automobile intelligent charging pile system also comprises a plurality of switch units, a direct current bus, a temperature sensor, a current sensor, a voltage sensor and a controller unit. The whole system disclosed in the invention is easy to control and is low in electric energy consumption, and energy saving efficiency can be improved.
Description
The application is filing date 2015-10-10, Application No. 201510662015.9, invention entitled one
Plant the divisional application of the patent application of electric automobile Intelligent charging spot system.
Technical field
The present invention relates to electric vehicle engineering field, particularly to a kind of a kind of electric automobile Intelligent charging spot system
System.
Background technology
Electric automobile is with vehicle power as power, novel green as the one of power drive wheels travel with motor
The vehicles that colour circle is protected.The vehicle power of electric automobile is typically carried out serial or parallel connection arrangement by plurality of groups of storage batteries
Combine, improve the power supply capacity of battery with this.Electric automobile is due to the relatively conventional vapour of effect on environment
Car is less, and its prospect is extensively had an optimistic view of.The most widely used power supply of electric automobile is lead-acid accumulator, but along with
The development of electric vehicle engineering, lead-acid accumulator is low due to energy, and charging rate is slow, and the life-span is short, gradually by it
He is replaced by battery.The power supply developed mainly has sodium-sulphur battery, nickel-cadmium cell, lithium battery, fuel electricity
Ponds etc., the application of these novel power supplies, the development for electric automobile opens wide prospect.Drive motor
Effect be the electric energy of power supply to be converted into mechanical energy, by transmission device or direct drive of wheel and work clothes
Put.
Electric automobile charging pile (station) refers to the website into charging electric vehicle, similar to present gas station.
Along with low-carbon economy becomes the theme of China's economic development, electric automobile charging station is as new forms of energy strategy and intelligence
Can the important component part of electrical network, and one of the emerging strategic industries that determines of State Council, will become from now on
Chinese Automobile Industry ' and the emphasis of energy industry development.
As it is shown in figure 1, existing electric automobile charging station major part gives charging by AC/DC convert charging device
Battery is powered, and is controlled the charging voltage size of each AC/DC convert charging device by control system, due to one
Individual charging station typically has tens charge position, and therefore control system controls extremely complex.
Battery is in charging process, in order to shorten the charging interval, and charging current and charged electrical time incipient
Pressing the biggest, at any time the prolongation in charging interval, the temperature of battery can constantly rise, and opens if continuing employing
If the charging voltage begun and charging current, the life-span of battery will be substantially reduced；Then charging voltage is occurred in that
The charging system for electric automobile being continually changing, it is single that the technical scheme gathered is exactly constantly regulation AC/DC conversion
The output voltage size of unit, needs control system constantly to control multiple AC/DC converting unit, the most whole control
The complexity of system is higher, owing to needing constantly to change the conducting turn-off time of IGCT so that whole system
Power consumption is bigger.
Summary of the invention
The technical problem to be solved in the present invention is: background section describe in order to extend the rechargeable battery life-span
Need the control program complexity constantly regulating AC/DC switching cell output voltages size higher, and frequently
Change IGCT conducting control the time more consume energy.
In order to solve above technical problem, technical scheme is as follows: a kind of electric automobile intelligent charge
Stake system, including 4 AC/DC unit, 4 charging cases；The input of each AC/DC unit connects electricity
Net；The output of AC/DC unit connects the input of charging case；Also include multiple switch element, dc bus,
Temperature sensor, current sensor, voltage sensor, controller unit；
4 AC/DC unit by the most named left-to-right AC/DC unit, the 2nd AC/DC unit,
Three AC/DC unit, the 4th AC/DC unit；
4 charging cases by the most named left-to-right first charging case, the second charging case, the 3rd charging case,
Four charging cases；
The output voltage of the oneth AC/DC unit is 1200V；
2nd AC/DC unit, the output voltage of the 3rd AC/DC unit are 800V；
The output voltage of the 4th AC/DC unit is 600V；
Two switch elements of series connection between output and the input of the first charging case of the oneth AC/DC unit, these are two years old
Connection node between individual switch element is defined as first node；
Two switch elements of series connection between output and the input of the second charging case of the 2nd AC/DC unit, these are two years old
Connection node between individual switch element is defined as Section Point；
Two switch elements of series connection between output and the input of the 3rd charging case of the 3rd AC/DC unit, these are two years old
Connection node between individual switch element is defined as the 3rd node；
Two switch elements of series connection between output and the input of the 4th charging case of the 4th AC/DC unit, these are two years old
Connection node between individual switch element is defined as fourth node；
Another branch road is also set up between output and the input of the first charging case of the oneth AC/DC unit, this
One switch element of series connection on road；
Another branch road is also set up, this branch road between output and the input of the second charging case of the 2nd AC/DC unit
One switch element of upper series connection；
Another branch road is also set up, this branch road between output and the input of the 3rd charging case of the 3rd AC/DC unit
One switch element of upper series connection；
Another branch road is also set up, this branch road between output and the input of the 4th charging case of the 4th AC/DC unit
One switch element of upper series connection；
A switch element it is connected between first node with Section Point；
A switch element is connected between Section Point and the 3rd node；
A switch element it is connected between 3rd node and fourth node；
A switch element it is connected between first node with fourth node；
The temperature of temperature sensor detection rechargeable battery；
Current sensor, voltage sensor may be contained within the input port of charging case；
Current sensor, voltage sensor detect charging current and the charging voltage of each rechargeable battery respectively；
Temperature sensor, current sensor, voltage sensor electrically connect with controller unit；
The end that controls of each switch element electrically connects with the I/O port of controller unit respectively；
Controller unit controls disconnection and the Guan Bi of each switch element by controlling the end that controls of switch element.
When the i-th AC/DC unit gives the i-th charging case charging, controller unit controls when the i-th AC/DC is mono-
Unit and the switch element Guan Bi connected between the i-th charging case, controller unit controls the i-th node with adjacent simultaneously
The switch element connected between node disconnects；
When the i-th AC/DC unit charges to jth charging case, controller unit controls the i-th node and i-th
Between charging case, that switch element of series connection disconnects, and controller unit controls the i-th node and the i-th AC/DC
That switch element Guan Bi of series connection between unit, controller unit controls the i-th AC/DC unit and the i-th charging
That branch road not comprising the i-th node between case disconnects；Controller unit controls jth node and charges with jth
That switch element Guan Bi of series connection between case, controller unit control jth node and jth AC/DC unit it
Between that switch element of series connection disconnect, controller unit controls between jth AC/DC unit and jth charging case
Do not comprise jth node that branch road disconnect；All nodes between i-th node and jth node mutually it
Between switch element by controller unit control Guan Bi；All nodes between i-th node and jth node with
Switch element between AC/DC unit is controlled to disconnect, between the i-th node and jth node by controller unit
Switch element between all nodes and charging case is controlled to disconnect by controller unit；
Wherein, 1≤i≤4；1≤j≤4；i≠j.
Further, described controller unit uses MSP430 single-chip microcomputer.
Further, described switch element uses controlled thyristor.
Compared with prior art, beneficial effects of the present invention: first, the present invention is by detection rechargeable battery
Temperature, charging current, charging voltage, thus adjust charging voltage, charging current in time, due to controller
Unit is simply by the control end controlling switch element thus changes charging voltage and the charging current of rechargeable battery,
Rather than by constantly changing the output voltage of AC/DC converting unit, so whole system controls to get up very
Simply；Second, by then passing through the Guan Bi and shutoff controlling switch element, without being constantly changing brilliant lock
The conducting of pipe controls the time, so the power consumption of whole system is relatively low, more energy-conservation；3rd, the present invention's
The output voltage of AC/DC converting unit is changeless, therefore controls very simple, in order to extend battery
The present invention in service life of charging can realize below scheme, if such as giving the 4th charging case charging, beginning
Time the 3rd AC/DC unit and the 2nd AC/DC unit can be used in parallel, can use after charging a period of time
Oneth AC/DC unit charging, finally can using the 4th AC/DC unit charging, filling need not to move the 4th
Just can allow the AC/DC unit of other charge position in the case of battery within electronic box is that the 4th charging case fills
Electricity；4th, the circuit design of the present invention can be with simple realization charged in parallel；5th, the AC/DC of the present invention
Being provided with two branch roads between unit and charging case to be advantageous in that, such as, the 2nd AC/DC unit is the 4th to fill
Electronic box charging needs the switch element between Section Point and the 3rd node close, the 3rd node and fourth node it
Between switch element Guan Bi, if at this time the 3rd AC/DC unit needs to the 3rd charging case charging, can be by
Another article of branch road Guan Bi between 3rd AC/DC unit and the 3rd charging case.
Accompanying drawing explanation
Fig. 1 is existing a kind of charging system for electric automobile principle block diagram；
Fig. 2 is the principle block diagram of the present invention；
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
Illustrate: AC/DC unit is that AC-DC conversion device belongs to existing known technology and is not described in detail.MSP430
Series monolithic is the single-chip microcomputer of 16, have employed Reduced Instruction Set Computer Architecture, MSP430 single-chip microcomputer it
So there being ultralow power consumption, being because it and reducing the supply voltage of chip and flexible and controlled operation clock side
There is its distinctive feature in face.
For 4 AC/DC unit by the most named left-to-right AC/DC unit, the 2nd AC/DC unit,
3rd AC/DC unit, the 4th AC/DC unit；4 charging cases by the most named left-to-right first charging case,
Second charging case, the 3rd charging case, the 4th charging case；It is intended merely to description and gets up convenient, actual enforcement
During, do not exist so-called by left-to-right position relationship.
As shown in Figure 2: a kind of electric automobile Intelligent charging spot system, including 4 AC/DC unit, 4 fill
Electronic box；The input of each AC/DC unit connects electrical network；The output of AC/DC unit connects charging case
Input；Also include multiple switch element, dc bus, temperature sensor, current sensor, voltage sensor
Device, controller unit；4 AC/DC unit by the most named left-to-right AC/DC unit, second
AC/DC unit, the 3rd AC/DC unit, the 4th AC/DC unit；
4 charging cases by the most named left-to-right first charging case, the second charging case, the 3rd charging case,
Four charging cases；
The output voltage of the oneth AC/DC unit is 1200V；
2nd AC/DC unit, the output voltage of the 3rd AC/DC unit are 800V；
The output voltage of the 4th AC/DC unit is 600V；
Two switch elements of series connection between output and the input of the first charging case of the oneth AC/DC unit, these are two years old
Connection node between individual switch element is defined as first node；
Two switch elements of series connection between output and the input of the second charging case of the 2nd AC/DC unit, these are two years old
Connection node between individual switch element is defined as Section Point；
Two switch elements of series connection between output and the input of the 3rd charging case of the 3rd AC/DC unit, these are two years old
Connection node between individual switch element is defined as the 3rd node；
Two switch elements of series connection between output and the input of the 4th charging case of the 4th AC/DC unit, these are two years old
Connection node between individual switch element is defined as fourth node；
Another branch road is also set up between output and the input of the first charging case of the oneth AC/DC unit, this
One switch element of series connection on road；
Another branch road is also set up, this branch road between output and the input of the second charging case of the 2nd AC/DC unit
One switch element of upper series connection；
Another branch road is also set up, this branch road between output and the input of the 3rd charging case of the 3rd AC/DC unit
One switch element of upper series connection；
Another branch road is also set up, this branch road between output and the input of the 4th charging case of the 4th AC/DC unit
One switch element of upper series connection；
A switch element it is connected between first node with Section Point；
A switch element is connected between Section Point and the 3rd node；
A switch element it is connected between 3rd node and fourth node；
A switch element it is connected between first node with fourth node；
The temperature of temperature sensor detection rechargeable battery；Current sensor, voltage sensor may be contained within charging case
At input port；Current sensor, voltage sensor detect charging current and the charging of each rechargeable battery respectively
Voltage；Temperature sensor, current sensor, voltage sensor electrically connect with controller unit；Each switch
The end that controls of unit electrically connects with the I/O port of controller unit respectively；Controller unit is by controlling switch element
The end that controls control the disconnection of each switch element and Guan Bi.
The following is the control algolithm that single AC/DC unit charges to charging case.
When the i-th AC/DC unit gives the i-th charging case charging, controller unit controls when the i-th AC/DC unit
The switch element Guan Bi connected with between the i-th charging case, controller unit controls the i-th node and adjacent segments simultaneously
The switch element connected between point disconnects；
When the i-th AC/DC unit charges to jth charging case, controller unit controls the i-th node and i-th
Between charging case, that switch element of series connection disconnects, and controller unit controls the i-th node and the i-th AC/DC
That switch element Guan Bi of series connection between unit, controller unit controls the i-th AC/DC unit and the i-th charging
That branch road not comprising the i-th node between case disconnects；Controller unit controls jth node and charges with jth
That switch element Guan Bi of series connection between case, controller unit control jth node and jth AC/DC unit it
Between that switch element of series connection disconnect, controller unit controls between jth AC/DC unit and jth charging case
Do not comprise jth node that branch road disconnect；All nodes between i-th node and jth node mutually it
Between switch element by controller unit control Guan Bi；All nodes between i-th node and jth node with
Switch element between AC/DC unit is controlled to disconnect, between the i-th node and jth node by controller unit
Switch element between all nodes and charging case is controlled to disconnect by controller unit；
Wherein, 1≤i≤4；1≤j≤4；i≠j.
Wherein, controller unit uses MSP430 single-chip microcomputer, and switch element uses controlled thyristor.
The concrete control method of embodiment (contains two AC/DC unit charged in parallel case chargings with single
AC/DC unit charges to charging case) principle:
The first step, if the 4th charging case will be i.e. a rechargeable battery charging, the current charging interval 0, inspection
Testing temperature 13 degree；At this moment can use high voltage, large current charge, use the AC/DC of output 1200V mono-
Unit is charged, and controller unit controls to disconnect the switch element above fourth node；Below Guan Bi fourth node
Switch element；Switch element between Guan Bi first node and fourth node；Simultaneously switch off below first node
Switch element, the switch element disconnected between Section Point and first node, disconnect the 3rd node and Section four
Switch between point；
Second step, it is assumed that charged 30 minutes, detection temperature is 30 degree；At this moment two can be used
The AC/DC unit parallel connection of output 800V is charged, and at this moment can close between the 3rd node and Section Point
Switch element, fourth node and the 3rd node between switch element, disconnect the switch list between other node
Unit；The control of other switch element is similar to the first step；
3rd step, it is assumed that charge 45 minutes, detection temperature is 30；At this time can be only with the 4th AC/DC
Unit is the rechargeable battery charging in the 6th charging case.
Electrical connection between AC/DC unit and the charging case of the present invention can be very easy to realize following need
Ask: battery is in charging process, in order to shorten the charging interval, charging current and charged electrical time incipient
Pressure needs the biggest, the prolongation in charging interval at any time, and the temperature of battery can constantly rise, at this moment using
Deng voltage, electric current charging, the when of waiting the temperature of battery to rise to higher, use low voltage, electric current
Charging.Electrical connection between AC/DC unit and the charging case of the present invention can be easily achieved several
AC/DC unit charged in parallel, be truly realized that charging voltage is variable, charging current is variable but control simultaneously simple,
The target that system energy consumption is low.
Above control method is an example, present invention only provides a kind of electric automobile intelligent charge
Stake system, the control method that this system is concrete can be adjusted according to actual conditions.
Present system adjusts charged electrical in time by the detection temperature of rechargeable battery, charging current, charging voltage
Pressure, substantially prolongs the life-span of battery so that charge safer；Owing to controller unit is simply by control
Switch element processed thus change the charging voltage of rechargeable battery and charging current rather than by changing AC/DC
The output voltage size of unit changes charging voltage, so whole system of the present invention controls very simple, more
Add energy-conservation.
Claims (3)
1. a control method for electric automobile Intelligent charging spot system, including 4 AC/DC unit, 4
Charging case；The input of each AC/DC unit connects electrical network；The output of AC/DC unit connects charging case
Input；It is characterized in that, also include that multiple switch element, dc bus, temperature sensor, electric current pass
Sensor, voltage sensor, controller unit；
4 AC/DC unit by the most named left-to-right AC/DC unit, the 2nd AC/DC unit,
Three AC/DC unit, the 4th AC/DC unit；
4 charging cases by the most named left-to-right first charging case, the second charging case, the 3rd charging case,
Four charging cases；
The output voltage of the oneth AC/DC unit is 1200V；
2nd AC/DC unit, the output voltage of the 3rd AC/DC unit are 800V；
The output voltage of the 4th AC/DC unit is 600V；
Two switch elements of series connection between output and the input of the first charging case of the oneth AC/DC unit, these are two years old
Connection node between individual switch element is defined as first node；
Two switch elements of series connection between output and the input of the second charging case of the 2nd AC/DC unit, these are two years old
Connection node between individual switch element is defined as Section Point；
Two switch elements of series connection between output and the input of the 3rd charging case of the 3rd AC/DC unit, these are two years old
Connection node between individual switch element is defined as the 3rd node；
Two switch elements of series connection between output and the input of the 4th charging case of the 4th AC/DC unit, these are two years old
Connection node between individual switch element is defined as fourth node；
Another branch road is also set up between output and the input of the first charging case of the oneth AC/DC unit, this
One switch element of series connection on road；
Another branch road is also set up between output and the input of the second charging case of the 2nd AC/DC unit, this
One switch element of series connection on road；
Another branch road is also set up between output and the input of the 3rd charging case of the 3rd AC/DC unit, this
One switch element of series connection on road；
Another branch road is also set up between output and the input of the 4th charging case of the 4th AC/DC unit, this
One switch element of series connection on road；
A switch element it is connected between first node with Section Point；
A switch element is connected between Section Point and the 3rd node；
A switch element it is connected between 3rd node and fourth node；
A switch element it is connected between first node with fourth node；
The temperature of temperature sensor detection rechargeable battery；
Current sensor, voltage sensor may be contained within the input port of charging case；
Current sensor, voltage sensor detect charging current and the charging voltage of each rechargeable battery respectively；
Temperature sensor, current sensor, voltage sensor electrically connect with controller unit；
The end that controls of each switch element electrically connects with the I/O port of controller unit respectively；
Controller unit controls disconnection and the Guan Bi of each switch element by controlling the end that controls of switch element；
When the i-th AC/DC unit gives the i-th charging case charging, controller unit controls when the i-th AC/DC unit
The switch element Guan Bi connected with between the i-th charging case, controller unit controls the i-th node and adjacent segments simultaneously
The switch element connected between point disconnects；
When the i-th AC/DC unit charges to jth charging case, controller unit controls the i-th node and i-th
Between charging case, that switch element of series connection disconnects, and controller unit controls the i-th node and the i-th AC/DC
That switch element Guan Bi of series connection between unit, controller unit controls the i-th AC/DC unit and the i-th charging
That branch road not comprising the i-th node between case disconnects；Controller unit controls jth node and charges with jth
That switch element Guan Bi of series connection between case, controller unit control jth node and jth AC/DC unit it
Between that switch element of series connection disconnect, controller unit controls between jth AC/DC unit and jth charging case
Do not comprise jth node that branch road disconnect；All nodes between i-th node and jth node mutually it
Between switch element by controller unit control Guan Bi；All nodes between i-th node and jth node with
Switch element between AC/DC unit is controlled to disconnect, between the i-th node and jth node by controller unit
Switch element between all nodes and charging case is controlled to disconnect by controller unit；
Wherein, 1≤i≤4；1≤j≤4；i≠j.
The control method of a kind of electric automobile Intelligent charging spot system the most according to claim 1, it is special
Levy and be: described controller unit uses MSP430 single-chip microcomputer.
The control method of a kind of electric automobile Intelligent charging spot system the most according to claim 1, it is special
Levy and be: described switch element uses controlled thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610316364.XA CN105846521A (en) | 2015-10-10 | 2015-10-10 | Electric automobile intelligent charging pile system control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510662015.9A CN105244985A (en) | 2015-10-10 | 2015-10-10 | Intelligent charging pile system for electric automobile |
| CN201610316364.XA CN105846521A (en) | 2015-10-10 | 2015-10-10 | Electric automobile intelligent charging pile system control method |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510662015.9A Division CN105244985A (en) | 2015-10-10 | 2015-10-10 | Intelligent charging pile system for electric automobile |
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| CN201510662015.9A Pending CN105244985A (en) | 2015-10-10 | 2015-10-10 | Intelligent charging pile system for electric automobile |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202206160U (en) * | 2011-09-09 | 2012-04-25 | 南京泰春电子有限公司 | Charging device of electric automobiles |
| CN104079052A (en) * | 2014-07-04 | 2014-10-01 | 国家电网公司 | Direct-current charging system of electric automobile |
| CN203967811U (en) * | 2014-07-04 | 2014-11-26 | 国家电网公司 | Electric automobile DC charging system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969777A (en) * | 2012-11-27 | 2013-03-13 | 郭源生 | Intelligent charging pile for electric vehicle storage battery |
| CN204559175U (en) * | 2015-04-10 | 2015-08-12 | 江苏德和新能源科技有限公司 | A kind of electric automobile charging pile intelligent monitoring and controlling device |
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- 2015-10-10 CN CN201610316364.XA patent/CN105846521A/en active Pending
- 2015-10-10 CN CN201510662015.9A patent/CN105244985A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202206160U (en) * | 2011-09-09 | 2012-04-25 | 南京泰春电子有限公司 | Charging device of electric automobiles |
| CN104079052A (en) * | 2014-07-04 | 2014-10-01 | 国家电网公司 | Direct-current charging system of electric automobile |
| CN203967811U (en) * | 2014-07-04 | 2014-11-26 | 国家电网公司 | Electric automobile DC charging system |
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| CN105244985A (en) | 2016-01-13 |
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Application publication date: 20160810 |