CN106505846A - A kind of soft starting circuit and soft-start method and direct-current charging post - Google Patents

A kind of soft starting circuit and soft-start method and direct-current charging post Download PDF

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Publication number
CN106505846A
CN106505846A CN201611015271.XA CN201611015271A CN106505846A CN 106505846 A CN106505846 A CN 106505846A CN 201611015271 A CN201611015271 A CN 201611015271A CN 106505846 A CN106505846 A CN 106505846A
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China
Prior art keywords
voltage
rectification module
switch
test point
controller
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CN201611015271.XA
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Chinese (zh)
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CN106505846B (en
Inventor
李智辉
闫寒明
胡超
孔德原
杨忠
吴展盛
李向民
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Shanghai Enneagon Energy Technology Co Ltd
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Shanghai Enneagon Energy Technology Co Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M1/36Means for starting or stopping converters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30Constructional details of charging stations
    • B60L53/31Charging columns specially adapted for electric vehicles
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M1/32Means for protecting converters other than automatic disconnection
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/72Electric energy management in electromobility
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/12Electric charging stations

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention provides a kind of soft starting circuit and soft-start method and direct-current charging post, including controller, rectification module, first switch, second switch, reverse-filling diode, the measured value of three test point of controller Real-time Collection, and the information of battery bag charging voltage and electric current is obtained from Vehicular battery management system BMS, first test point detects the voltage between the rectification module positive output end and negative output terminal, second test point detection detection charging pile exports the voltage at positive and negative end, and the 3rd test point is used for the output current for detecting charging pile and rectification module;The controller is by adjusting the output voltage and electric current of rectification module, and the break-make sequential of control first switch and second switch so that in charging process is started, it is to avoid the generation of surge current.The present invention effectively inhibits the surge current started when charging, it is to avoid the electrical part caused because of inrush current shock is damaged, by the control to switching device sequential, it is to avoid the situation that its contact is adhered.

Description

A kind of soft starting circuit and soft-start method and direct-current charging post
Technical field
The present invention relates to new-energy automobile charging technique field, in particular it relates to a kind of soft starting circuit, corresponding soft open Dynamic method, and using the soft starting circuit and the direct-current charging post of method.
Background technology
The startup charging scheme that commonly uses in the middle of direct-current charging post, mainly by controller and battery bag management system (BMS) communicate, and obtain battery bag current voltage, highest and allow charging voltage and initial charge current (usually battery bag is most Big charging current), voltage and current desired value when controller starts in this, as rectification module.When rectification module starts, Output voltage rises rapidly, when output voltage exceed battery bag voltage when, due to charge circuit current-limiting resistance very little, electric current Rapid rising, before cut-off current is reached, rectification module output voltage continues rapid increase, causes to produce surge current;If Switch-closed time is improper, will aggravate this surge current.It can be seen that this method merely by rectification module current limliting speed and Precision, it is difficult to effectively suppress or eliminate surge current, easily causes each component life of charge circuit and shortens or damage.
Content of the invention
For defect of the prior art, it is an object of the invention to provide a kind of soft starting circuit and soft-start method and straight Current charge stake, can suppress to start the surge current in charging process, it is to avoid surge current impacts electrical part damage, lead to Cross the control to switching device sequential, it is to avoid the situation that its contact is adhered.
For realizing that object above, the present invention are realized by below scheme:
According to an aspect of the present invention, there is provided a kind of soft starting circuit, including:Controller, rectification module, first open Pass, second switch, reverse-filling diode, the first switch and the second switch include control end and a contact, institute Stating rectification module includes positive and negative output end and control end, wherein:
The control end of the first switch, the control end of the second switch, the rectification module control end respectively with The controller electrical connection, the positive output end of the rectification module is connected with the anode of the reverse-filling diode, described anti-down The negative electrode for filling diode is connected with the contact of the first switch, the negative output terminal of the rectification module and the second switch Contact is connected;
First test point of controller Real-time Collection, the second test point, the measured value of the 3rd test point, and from vehicle electrical Pond management system BMS obtains the information of battery bag charging voltage and electric current, and first test point is just detecting the rectification module Voltage between output end and negative output terminal, the second test point detection detection charging pile export the voltage at positive and negative end, described 3rd test point be located between rectification module negative output terminal and the contact of second switch, the 3rd test point be used for detect charging pile and The output current of rectification module;In order to provide charging voltage and the electric current of battery demand packet, the controller is by adjusting rectification The output voltage and electric current of module, and the break-make sequential of control first switch and second switch so that starting charging process In, it is to avoid the generation of surge current.
According to the second aspect of the invention, there is provided a kind of soft-start method of employing foregoing circuit, methods described include as Lower step:
Step 1:The first test point of controller real-time monitoring and the voltage of the second test point, the first test point and the second detection The voltage measurement error precision of point is respectively ± M1%, ± M2%, the electric current of the 3rd test point of real-time monitoring, measures second this moment The voltage of test point is V2
Step 2:Controller sets rectification module output voltage desired value as zero, set rectification module output current limit value as Zero;Controller starts the output of rectification module, while controlling rectification module output voltage desired value by zero with normal speed C1Rise For
Step 3:When the voltage of the first test point reaches the voltage-target in step 2When, keep voltage target ValueOutput current limit value in constant, step 2 is constant, and controller control first switch and second switch are closed;
Step 4:After controller detects first switch and second switch is closed, voltage-target is basic in step 2 On, with speed C2Increase the output voltage of rectification module, while it is I rectification module output current limit value to be controlled by zero saltus step1
Step 5:When the current value of the 3rd test point is more than or equal to current limit I1When, controller is with speed B1Increase rectification Module output current limit value, until rectification module output current limit value increases to BMS request charging currents I0;Meanwhile, rectification mould The target voltage of group continues to increase;
Step 6:When the target voltage of rectification module increases toWhen, the output target electricity of controller control rectification module Pressure saltus step is that the battery bag highest of BMS requests allows charging voltage Vbat;
So far, soft start charging process terminates, and enters normal charging process.
Preferably, in step 1, the M1% < 1%, the M2% < 5%.
Preferably, in step 2 and step 4, speed C1>=5 times of speed C2.
Preferably, in step 5, current limit I1For 5~10A;Speed B1, it is recommended that 4A/S≤B1≤ 25A/S, Under conditions of starting time requirement is met, low rate is selected as far as possible.
According to the third aspect of the invention we, there is provided a kind of comprising above-mentioned soft starting circuit and using above-mentioned soft-start method Direct-current charging post.
Compared with prior art, the present invention has following beneficial effect:
The present invention adopts above-mentioned soft start-up scheme, in its applicable charge circuit, effectively inhibits and starts when charging Surge current, it is to avoid the electrical part caused because of inrush current shock is damaged, by the control to switching device sequential, it is to avoid The situation that its contact is adhered.
The present invention can be good at suitable for direct-current charging post using above-mentioned soft start-up scheme.
Description of the drawings
The detailed description that non-limiting example is made with reference to the following drawings by reading, the further feature of the present invention, Objects and advantages will become more apparent upon:
Soft start charging circuit block diagrams of the Fig. 1 for one embodiment of the invention;
Soft start charging flow figures of the Fig. 2 for one embodiment of the invention;
Soft start charging process each point waveform timing charts of the Fig. 3 for one embodiment of the invention.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this area For personnel, without departing from the inventive concept of the premise, some deformations and improvement can also be made.These belong to the present invention Protection domain.
As shown in figure 1, a kind of soft starting circuit, including controller, rectification module, first switch K1, second switch K2, anti- Pour in down a chimney diode D1, first switch K1, the second switch K2 respectively include control end and a contact, the rectification module Including positive-negative output end and control end;The controller connects the first test point, the second test point, the 3rd test point, wherein:
The control end of first switch K1, the control end of the second switch K2, the control end point of the rectification module Do not electrically connect with the controller, the positive pole of the rectification module is connected with the anode of the reverse-filling diode D1, described anti- The negative electrode for pouring in down a chimney diode D1 is connected with the contact of first switch K1;The negative pole of the rectification module and the second switch The contact of K2 is connected;
First test point detects that the voltage between the rectification module positive output end and negative output terminal, the second test point are detected Detection charging pile exports the voltage at positive and negative end, the 3rd test point be located at rectification module negative output terminal and second switch contact it Between, the 3rd test point is used for the output current for detecting charging pile and rectification module.The controller is from Vehicular battery management system BMS obtains the information of battery bag charging voltage and electric current, first test point of controller Real-time Collection, the second test point, the The measured value of three test points.
In order to provide charging voltage and the electric current of battery demand packet, the controller is electric by the output for adjusting rectification module Pressure and electric current, and the break-make sequential of control first switch and second switch so that in charging process is started, it is to avoid surge The generation of electric current.
In an alternative embodiment of the invention, soft start is carried out using foregoing circuit, its step is:
Step 1:The first test point of controller real-time monitoring and the voltage of the second test point, the first test point and the second detection The voltage measurement error precision of point is respectively ± M1%, ± M2%;The electric current of the 3rd test point of real-time monitoring, measures second this moment The voltage of test point is V2
Step 2:Controller sets rectification module output voltage desired value as zero, set rectification module output current limit value as Zero.Controller starts the output of rectification module, while control rectification module output voltage desired value being risen with normal speed C1 by zero For
Step 3:When the voltage of the first test point reaches the voltage-target in step 2, keep voltage-target constant, Output current limit value in step 2 is constant, and control first switch and second switch are closed;
Step 4:After first switch is detected and second switch is closed, in step 2 on the basis of voltage-target, with speed Rate C2 increases the output voltage of rectification module, while controlling rectification module output current limit value jumps I by zero1
Step 5:When the current value of the 3rd test point is greater than, equal to current limit I1When, rectification module is increased with speed B 1 Output current limit value, until rectification module output current limit value increases to BMS request charging currents I0;Meanwhile, rectification module Target voltage continues to increase;
Step 6:When the target voltage of rectification module increases toWhen, control the output target voltage saltus step of rectification module Battery bag highest for BMS requests allows charging voltage Vbat;
So far, soft start charging process terminates, and enters normal charging process.
In an alternative embodiment of the invention, using foregoing circuit and method, charge for direct-current charging post, charging pile is concrete The course of work as follows:
First, charging pile self-inspection is completed, and is shaken hands successfully with Vehicular battery management system (BMS), and charging pile is obtained from BMS Battery highest allows charging voltage Vbat, request charging current I0;Vehicle enters the ready state that charges.Soft open below is entered The dynamic charging stage:
Step 1:Controller real-time monitoring the first test point 1 and the voltage of the second test point 2, its measure error precision difference For ± M1%, ± M2%;The electric current of the 3rd test point 3 of real-time monitoring, the voltage for measuring the second test point 2 this moment are V2.
Step 2:Controller controls rectification module output voltage desired value by zero with speed C1Rise toAnd start Rectification module is exported, while it is zero to control rectification module output current limit value;If with this moment as t0At the moment, t is represented with t0Moment it Any time afterwards, then the voltage of the first test point 1 can be expressed as with the relation of time:vO(t)=C1×(t-t0).
Step 3:t1Moment, the voltage of the first test point 1 reach the target voltage in step 2When, keep target electricity Pressure value is constant, and current limit is constant, first switch K1, second switch K2 closures.
Step 4:After detecting first switch K1, second switch K2 and closing, in step 2 on the basis of target voltage, with Speed C2Increase output voltage, while controlled output current limit is I by zero saltus step1, with this moment as t2, then first test point 1 Voltage follow rectification module output voltage, the voltage of the first test point are can be expressed as with the relation of time:vO(t)=C1×(t1- t0)+C2×(t-t2).Current limit I1As far as possible little, such as I1Can be 5~10A.
Step 5:t3Moment, the current value of the 3rd test point 3 are equal to current limit I described in step 41, with low rate B1Increase Power-up restriction value, until current limit increases to BMS request charging currents I0, then the current value of the 3rd test point 3 and time Relation can be expressed as:iO(t)=B1×(t-t3)+I1;Meanwhile, the target voltage of rectification module continues with low rate C2Increase, But the voltage of the first test point 1 is in t3Do not increase followed by target voltage after moment, but be slowly increased with cell voltage.
t4Moment, the electric current of the 3rd test point 3 reach BMS request charging currents I0.
Step 6:t6Moment, rectification module target voltage increase toThe output target voltage of control rectification module is jumped The battery bag highest for being changed into BMS requests allows charging voltage Vbat;So far, soft start charging process terminates, and entrance is charged normal Process.
As one preferred embodiment, speed C1>=5C2, t0~t4 is controlled in 8~10S;4A/S≤B1≤25A/ S, under conditions of starting time requirement is met, selects low rate as far as possible.
As one preferred embodiment, in step 1, the measure error essence of first test point 1 and the second test point 2 Degree voltage M1、M2As far as possible little, M2% < 5%, M1% < 1%.
Can see from the expression formula of the electric current of the 3rd test point 3, whole start-up course effectively inhibits surge current, Avoid the electrical part that causes because of inrush current shock to damage, by the control to switching device sequential, it is to avoid its contact Situation about being adhered.
The waveform timing chart of above stage each point, with reference to Fig. 3.
The present invention effectively inhibits the surge current started when charging, it is to avoid because of wave in its applicable charge circuit The electrical part that gushes rush of current and cause is damaged, by the control to switching device sequential, it is to avoid the situation that its contact is adhered.
Above the specific embodiment of the present invention is described.It is to be appreciated that the invention is not limited in above-mentioned Particular implementation, those skilled in the art can make various modifications or modification within the scope of the claims, this not shadow Ring the flesh and blood of the present invention.

Claims (7)

1. a kind of soft starting circuit, it is characterised in that include:Controller, rectification module, first switch, second switch, reverse-filling Diode, the first switch and the second switch include that control end and a contact, the rectification module include positive and negative Output end and control end, wherein:
The control end of the first switch, the control end of the second switch, the rectification module control end respectively with described Controller is electrically connected, and the positive output end of the rectification module is connected with the anode of the reverse-filling diode, the reverse-filling two The negative electrode of pole pipe is connected with the contact of the first switch, the negative output terminal of the rectification module and the contact of the second switch It is connected;
First test point of controller Real-time Collection, the second test point, the measured value of the 3rd test point, and from Vehicular battery pipe Reason system BMS obtains the information of battery bag charging voltage and electric current, the first test point detect the rectification module positive output end with Voltage between negative output terminal, the second test point detection detection charging pile export the voltage at positive and negative end, and the 3rd test point is located at whole Between stream module negative output terminal and the contact of second switch, the 3rd test point is used for the output electricity for detecting charging pile and rectification module Stream;In order to provide charging voltage and the electric current of battery demand packet, the controller by adjust rectification module output voltage and Electric current, and the break-make sequential of control first switch and second switch so that in charging process is started, it is to avoid surge current Generation.
2. the soft-start method of circuit described in a kind of employing claim 1, it is characterised in that methods described comprises the steps:
Step 1:The first test point of controller real-time monitoring and the voltage of the second test point, the first test point and the second test point Voltage measurement error precision is respectively ± M1%, ± M2%, the electric current of the 3rd test point of real-time monitoring, measures the second detection this moment The voltage of point is V2
Step 2:Controller sets rectification module output voltage desired value as zero, sets rectification module output current limit value as zero; Controller starts the output of rectification module, while controlling rectification module output voltage desired value by zero with normal speed C1Rise to
Step 3:When the voltage of the first test point reaches the voltage-target in step 2When, keep voltage-targetOutput current limit value in constant, step 2 is constant, and controller control first switch and second switch are closed;
Step 4:After controller detects first switch and second switch is closed, in step 2 on the basis of voltage-target, with Speed C2Increase the output voltage of rectification module, while it is I rectification module output current limit value to be controlled by zero saltus step1
Step 5:When the current value of the 3rd test point is more than or equal to current limit I1When, controller is with speed B1Increase rectification module Output current limit value, until rectification module output current limit value increases to BMS request charging currents I0;Meanwhile, rectification module Target voltage continues to increase;
Step 6:When the target voltage of rectification module increases toWhen, the output target voltage of controller control rectification module is jumped The battery bag highest for being changed into BMS requests allows charging voltage Vbat;
So far, soft start charging process terminates, and enters normal charging process.
3. a kind of soft-start method according to claim 2, it is characterised in that in step 1, the M1% < 1%, described M2% < 5%.
4. a kind of soft-start method according to claim 2, it is characterised in that in step 2 and step 4, the positive constant speed Rate C1>=5 times of speed C2.
5. a kind of soft-start method according to any one of claim 2-4, it is characterised in that in step 5, the electric current limit Value I1For 5~10A.
6. a kind of soft-start method according to claim 5, it is characterised in that in step 5, speed B1, value is: 4A/S≤B1≤ 25A/S, under conditions of starting time requirement is met, selects low rate as far as possible.
7. a kind of direct-current charging post comprising circuit described in the claims 1 and using claim 2 methods described.
CN201611015271.XA 2016-11-15 2016-11-15 A kind of soft starting circuit and soft-start method and direct-current charging post Active CN106505846B (en)

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CN110103737A (en) * 2018-01-19 2019-08-09 郑州宇通客车股份有限公司 A kind of electric car mobile charging control method and device
CN110588436A (en) * 2019-10-23 2019-12-20 清远市昭元电力科技有限公司 Charging pile control module
CN110979080A (en) * 2019-12-20 2020-04-10 北京理工大学 BMS self-adaptive control method and system for charging voltage
EP4283316A4 (en) * 2021-03-04 2024-05-15 Huawei Digital Power Technologies Co., Ltd. Detection circuit, backflow prevention system, and charging pile

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CN105730265A (en) * 2016-01-21 2016-07-06 易事特集团股份有限公司 Charging starting device for DC charging pile for electric automobile
CN205429808U (en) * 2016-03-16 2016-08-03 广州冠廷机电设备有限公司 Electric automobile removes on -vehicle machine that charges of quick direct current of pocket non -
CN105871000A (en) * 2016-04-08 2016-08-17 深圳市清友能源技术有限公司 Current control method for direct current charger

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CN110103737A (en) * 2018-01-19 2019-08-09 郑州宇通客车股份有限公司 A kind of electric car mobile charging control method and device
CN110103737B (en) * 2018-01-19 2021-05-14 郑州宇通客车股份有限公司 Mobile charging control method and device for electric automobile
CN108839581A (en) * 2018-06-29 2018-11-20 北京新能源汽车股份有限公司 Electric car method for controlling power supply, device and equipment
CN110588436A (en) * 2019-10-23 2019-12-20 清远市昭元电力科技有限公司 Charging pile control module
CN110979080A (en) * 2019-12-20 2020-04-10 北京理工大学 BMS self-adaptive control method and system for charging voltage
EP4283316A4 (en) * 2021-03-04 2024-05-15 Huawei Digital Power Technologies Co., Ltd. Detection circuit, backflow prevention system, and charging pile

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