CN106451709A - General charger for electric automobile - Google Patents
General charger for electric automobile Download PDFInfo
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- CN106451709A CN106451709A CN201610784764.3A CN201610784764A CN106451709A CN 106451709 A CN106451709 A CN 106451709A CN 201610784764 A CN201610784764 A CN 201610784764A CN 106451709 A CN106451709 A CN 106451709A
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- Prior art keywords
- voltage
- circuit
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- module
- output
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION 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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/11—DC charging controlled by the charging station, e.g. mode 4
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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
- H02J7/04—Regulation of charging current or voltage
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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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 embodiment provides a general charger for a stabilized power supply stacked general electric automobile charging station. The generation charger comprises an input circuit, a transformation circuit, an output circuit, a voltage superposition module, a detection module, a control circuit and a communication module, wherein the transformation circuit is used for adjusting a voltage and a current inputted by the input circuit according to an instruction of the control circuit and then sending the voltage and the current after adjustment to the output circuit, the voltage superposition module is used for carrying out series superposition of the voltages inputted by the output circuit and an external DC stabilized power supply input module, the detection module is connected with the voltage superposition module and is used for sampling the voltage and/or the current, and the control circuit is used for controlling the output switch and the transformation circuit according to a detection result of the detection module and the information received by the communication module. The general charger is advantaged in that the general charger has the self-contained power supply and can be in series connection with the external stabilized power supply, voltage output is carried out after voltage superposition, so the output voltage can be flexibly changed through the charger, and adaptation to different electric automobiles is realized.
Description
Technical field
The invention belongs to charger field, more particularly to a kind of general charging of the electric automobile that can stack with regulated power supply
Device.
Background technology
New-energy electric vehicle, is surrounded by the requirement of voltage and capacity to the battery as power resources, battery bag often by
Thousands of cells, consist of connection in series-parallel.System voltage from tens volts to several hectovolts, battery capacity from tens KWH to
Hundreds of KWH, different.
Present charging station (stake) is an independent special equipment, according to the battery bag voltage of electric automobile, provides and fills
Piezoelectric voltage, according to the battery capacity of electric automobile, provides charging current.Charging station or charging pile substantially are for a certain
Specific electric automobile special equipment, bad adaptability, it is difficult to meet the charging requirement of panoramic electric automobile.
And for electric automobile, load-carrying and speed are different, the voltage of the battery bag of needs is different with capacity, it is difficult to unified.
Therefore, now a lot of electric automobiles can not find suitable charger, and not solve the charging problems of electric automobile, electronic vapour
Car is difficult to promote.
Content of the invention
It is an object of the invention to provide a kind of universal charger of electric automobile, to solve electric automobile in prior art
Charger just for a certain type electric automobile, cause charging electric vehicle inconvenience problem.
The invention discloses a kind of universal charger of electric automobile, the charger includes：
Input circuit, translation circuit, output circuit, voltage superposition module, detection module, control circuit and communication mould
Block；
The translation circuit is connected with the input circuit, defeated to input circuit for instruction according to the control circuit
The voltage x current for entering is sent after being adjusted to the output circuit；
The voltage superposition module, the voltage for the output circuit is input into D.C. regulated power supply input module enters
Row overlapped in series；
The detection module is connected with the voltage superposition module, for sampling to voltage and/or electric current；
The control circuit, for the information for being received according to the testing result of the detection module and the communication module
Output switch and the translation circuit are controlled.
Preferably, the communication module is for receiving the information and electric automobile electricity that the charging network for sending connection is completed
The current voltage of Chi Bao；
The control circuit, for improving constantly its voltage after the information that charging network connection is completed is received
Until when the voltage after superposition is equal with the current voltage of the batteries of electric automobile bag, controlling the output switch closure.
Preferably, the communication module, for receiving the initial charge current for sending；
The control circuit, for being controlled to the translation circuit according to the initial charge current, with according to institute
State initial charge current to be charged electric automobile.
Preferably, the control circuit, the output voltage for being additionally operable to detect itself in the detection module reaches first
During given threshold, the instruction for reducing output current is sent to the translation circuit, until when the electric current of output is zero, control is described
Output switch disconnects and sends the instruction of coupling charging network again to the communication module.
Preferably, the communication module, is additionally operable to receive the reduction electric current first for sending and instructs；
The control circuit, is controlled to the translation circuit for being instructed according to the reduction electric current first to reduce
Electric current；
The reduction electric current first is instructed and is generated when arbitrary single-unit voltage of the battery bag reaches the second given threshold,
Second given threshold is not more than the end of charge voltage of the cell.
Preferably, the communication module, is additionally operable to receive the reduction electric current second for sending and instructs；
The control circuit, is controlled to the translation circuit for being instructed according to the reduction electric current second to reduce
Electric current；
The reduction electric current second is instructed and is generated when the temperature of any point of the battery bag reaches three given thresholds.
Preferably, the communication module, is additionally operable to receive the charging termination instruction for sending；
The control circuit, for instructing according to the charging termination or when detecting charging current and being zero, controlling institute
State output switch disconnection.
Preferably, the translation circuit includes phase shift bridge soft switch circuit and high frequency transformer.
Preferably,
The input circuit includes three-phase alternating current input block and current rectifying and wave filtering circuit；
The output circuit includes synchronous rectification filter unit and DC output unit.
Preferably, the communication module is communicated by CAN.
The present invention is by providing a kind of universal charger of electric automobile, and the charger includes the power supply of itself can be by
The extraneous regulated power supply series connection of varying number, will export after voltage superposition.Such charger flexibly can change output voltage,
To adapt to different electric automobiles.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for technology description is had to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments described in application, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structure chart of electric automobile universal charger；
Fig. 2 is a kind of concrete structure of universal charger of the present invention；
Fig. 3 is single-unit V diagram of the present invention.
Specific embodiment
In order that those skilled in the art more fully understand the technical scheme in the application, below in conjunction with the application reality
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described enforcement
Example is only some embodiments of the present application, rather than whole embodiments.Based on the embodiment in the application, this area is common
The every other embodiment obtained under the premise of creative work is not made by technical staff, should all belong to the application protection
Scope.
For making the present invention clearer, first following term is described：
BMS：Present electric automobile, as the battery bag of power resources, has thousands of lithium ion single batteries, by string
Compose in parallel, the charging requirement of lithium ion battery is strict, overcharges and crosses and has put potential safety hazard, it is necessary to strict control.So, electricity
The standard configuration of electrical automobile, has a battery management system BMS.BMS is responsible for detecting battery voltage, the temperature inside battery bag
The battery parameter such as degree and monomer (saving) voltage.
End of charge voltage：Now to charging electric vehicle, it is that BMS is manually set end of charge voltage in advance, this electricity
The product of the battery number equal to battery bag series connection and the theoretical end of charge voltage of cell is pressed, in order to prevent overcharging, is led to
Certain surplus can be often left, such as battery producer specifies that the end of charge voltage of cell is that 4.2V, BMS factory sets charging
During voltage, 4.1V is manually set into, prevents from overcharging.Assume that battery bag is in series by 100 single batteries, the charging electricity of setting
Press and be：100*4.1V=410V, when battery is charged to terminal voltage to 410V, cuts off charge circuit, prevents over-charging of battery.
Charging current：It is capacity of the BMS according to specific battery bag that charging current sets, and is manually set a maximum current
Value, is normally set up 1C, completes the time theory value 1 hour for charging, more than the upper limit of this electric current, cut-out charge circuit.
The present invention is intended to provide a kind of universal charger of electric automobile, can be with the extraneous regulated power supply mould of varying number
Block is connected, and will export, to meet the charge requirement of different electric automobiles after its voltage and power module of voltage regulation voltage superposition.
As shown in figure 1, a kind of structure chart of the electric automobile universal charger for providing for the present invention, including：
Input circuit 11, translation circuit 12, output circuit 13, voltage superposition module 15, detection module 16, control circuit
17th, communication module 18.Its mutual annexation is as shown in the figure.
The translation circuit 12 is connected with the input circuit 11, for according to the instruction of the control circuit 17 to input
The voltage x current that circuit 11 is input into is sent to the output circuit 13 after being adjusted.
The voltage superposition module 15, for will be defeated with extraneous D.C. regulated power supply input module 14 for the output circuit 13
The voltage for entering carries out overlapped in series.
The detection module 16 is connected with the voltage superposition module 15, for sampling to voltage and/or electric current.
The control circuit 17, for receiving according to the testing result of the detection module 16 and the communication module 18
Information the output switch 19 in charging network and the translation circuit 12 are controlled.Specific control strategy will under
Text is introduced.
It can be seen that, the universal charger of the present invention includes voltage superposition module 15, can connect with extraneous regulated power supply, by electricity
Laminated is exported after adding, meanwhile, can also adjust the voltage of itself as needed, it is thus possible to the last output voltage of flexible,
Required with the charging electric vehicle that adapts to different.
As shown in Fig. 2 for a kind of concrete structure of universal charger of the present invention, using switch power supply topological structure.
Wherein input circuit includes three-phase alternating current input block 111 and rectification filtering unit 112；Translation circuit includes power supply
Management module 121 and high frequency transformer 122；Output circuit includes synchronous rectification filter unit 131 and DC output unit 132,
Control circuit is single-chip microcomputer 171, and communication module is CAN communication module 181.Also include D.C. regulated power supply input module in addition
141, voltage superposition module 151 and detection module 161.Wherein, above-mentioned power management module 121 is from phase shift bridge Sofe Switch electricity
Road.
In conjunction with the charging scenarios of electric automobile, communication module mainly with battery bag in BMS and charging station control in
The heart carries out data exchange.Below as example, describe the present invention.
The present invention is connected with D.C. regulated power supply to the universal charger of charging electric vehicle, and VD is 40V
The output current of～100V, electric current and regulated power supply is consistent, it is ensured that system possesses same power supply capacity.
Universal charger adopts switch power supply topological structure, output voltage and regulated power supply voltage superposition, and detection module is examined
Survey the total voltage of superposition and batteries of electric automobile bag current voltage is contrasted, when two polygonal voltages are equal, control circuit is closed
Output switch, it is to avoid instantaneous large-current, the impact to lithium ion battery of electric automobile and Switching Power Supply, realize the steady mistake of 0 electric current
Degree.
After the charging network of power module of voltage regulation and universal charger composition is connected with electric automobile, batteries of electric automobile
The BMS of bag sends the specifications and models of battery bag first by CAN, mainly includes battery capacity, battery end of charge voltage,
Battery current voltage, maximum temperature etc. in battery bag.Message is broadcasted on CAN controller local net network.
Charging station control centre receives these information, according to current voltage, selects quantity and the specification of power module of voltage regulation,
Coupling serves as front electric network.According to the capacity of battery bag, determine the charging current of universal charger (with reference to regulated power supply and general
The rated current of charger), according to the end of charge voltage of battery bag, determine the charging network of charging final stage, be last
Complete charging to prepare.
After charging network accesses universal charger, the detection module detection batteries of electric automobile bag of universal charger is current
Voltage, and its voltage is lifted, total voltage after charging network and the voltage superposition of itself and batteries of electric automobile bag are current
Voltage equal moment, the control circuit of universal charger is single-chip microcomputer closure output switch, realizes 0 electric current smooth transition.With
Start the PWM aperture of power switching device is increased, according to the current order of electric automobile BMS, export satisfactory electric current
To charging electric vehicle.
In charging process, the single-unit voltage that in battery bag, cell parallel is formed and temperature are all rising, and single-unit voltage is more than
The end of charge voltage of cell, then for overcharging, lithium ion battery is not allowed to be occurred overcharging.When single-unit voltage in battery bag
When maximum is close to the cell end of charge voltage of lithium ion battery, BMS sends the first instruction of current step-down, general fills
Electrical equipment receives the order by communication module, and control circuit sends the order for reducing current step-down 5%～10% at once to conversion
Circuit carries out the regulation of electric current.
As shown in figure 3, BMS is constantly detected to battery bag, and 40 cell parallel connections, two nodes are formed, this two
Voltage between individual node, is approximately equal to the monomer voltage (hereinafter referred to as single-unit voltage) of lithium ion battery.39 single-unit voltages
Series connection, superposition forms 144V platform voltage.
39 section single-unit voltage samples of the BMS to the batteries in parallel connection inside battery bag, 39 single-unit voltage sums, are batteries
The total voltage of bag, BMS is compared to the 39 single-unit voltages for collecting, and determines the maximum of 39 single-unit voltages, when wherein
One single-unit voltage, when being close to the fixed end of charge voltage of battery production factory rules and regulations, sends the life of current step-down to universal charger
Order.The form of order must be unified, and after universal charger receives the instruction of current step-down first that CAN transmission comes, it is right to stop
Charging electric vehicle, pauses and reduces charging current, then proceedes to charge.The amplitude that successively decreases and ratio, by universal charger control
System.As the charging interval elapses, single-unit voltage continues to rise, and when the maximum of single-unit voltage, is again close to end of charge voltage
When, BMS sends " current step-down " order again.So repeatedly.
Lithium ion battery, carries out charge and discharge cycles more than temperature 60 C, and capacity can be caused to decline, and the lost of life works as electricity
When temperature maximum in the bag of pond is close to 55 DEG C, BMS sends the second instruction of current step-down, and universal charger passes through communication module
After receiving the instruction, control circuit sends reduce electric current 20%～30% order at once and carries out the tune of electric current to translation circuit
Section.
First instruction is different with second two kinds of amplitudes that successively decreases of instruction, and it is to eliminate polarization to be because that the first successively decreases, and second
Planting successively decreases is affected by battery bag thermal capacity and temperature inertness, effect difference.
Supply voltage switch adjusting range, is limited by high frequency transformer, has certain scope, more than this scope, electricity
Pressure can not improve.So, after the cell voltage of electric automobile is increased to exceed the voltage regulation limits of universal charger, need
Charging network is mated again in charging station control centre.
First, control centre passes through CAN, sends the order for stopping to charge, and the control circuit of universal charger is immediately
Power switching device is turned off, is stopped power supply.When charging network output current is 0, the control circuit control of universal charger is cut
Disconnected output switch, control centre starts to switch the air switch of regulated power supply, mates again charging network.Every operation intelligence
Change, automatization, take and be less than 10 seconds.Charging network coupling is finished, and control centre sends " starting to charge up " order, general charging
After the communication module of device receives the order, start batteries of electric automobile bag current voltage and charging network voltage is detected, work as both sides
Voltage equal moment, charging main switch is closed, restart to charge.
Complete charge has two kinds of selections, the first：Battery typically need not be charged to 100% by charging station, when BMS is detected
When the electricity of battery bag reaches the ratio of needs, the communication module of the order of charging termination to universal charger, this time control are assigned
Circuit control output switch disconnection processed.Second：When electric current repeatedly successively decreases, it is whole less than charging that detection module detects charging current
Only during electric current, control circuit control output switch disconnection, complete charge, battery at this moment has filled full.
Lithium ion single battery end of charge voltage 4.2V, final discharging voltage 2.5V, 100 section cell series connection, electricity
Pressure window is 420V～250V, voltage window 170V, and more than the cell of bus series connection, window is bigger.It is appropriate to select
Regulated power supply stacking, with universal charger coordinate, the charging electric vehicle demand of any electric pressure can be met.
Although the application is depicted by embodiment, it will be appreciated by the skilled addressee that the application have many deformation and
Change is without deviating from spirit herein, it is desirable to which appended claim includes these deformation and change without deviating from the application's
Spirit.
Claims (10)
1. a kind of universal charger of electric automobile, it is characterised in that the charger is by switch power module and CAN communication module
Composition, specifically includes：
Input circuit, translation circuit, output circuit, voltage superposition module, detection module, single chip machine controlling circuit and communication mould
Block；
The translation circuit is connected with the input circuit, for be input into input circuit according to the instruction of the control circuit
Voltage x current is sent after being adjusted to the output circuit；
The voltage superposition module, the voltage for the output circuit is input into extraneous D.C. regulated power supply input module enters
Row overlapped in series；
The detection module is connected with the voltage superposition module, for sampling to voltage and/or electric current；
The control circuit, for according to the testing result of the detection module and the information of communication module reception to filling
Output switch and the translation circuit on electric network is controlled.
2. a kind of universal charger of electric automobile as claimed in claim 1, it is characterised in that the communication module is used for connecing
The information that the charging network connection that transmitting-receiving is sent is completed；
The control circuit, for improving constantly its voltage after the charging network information that completes of connection is received until
When voltage after superposition is equal with the current voltage of batteries of electric automobile bag, control the output switch closure.
3. a kind of universal charger of electric automobile as claimed in claim 1, it is characterised in that the communication module, is used for
Receive the initial charge current for sending；
The control circuit, for being controlled to the translation circuit according to the initial charge current, with according to described first
Beginning charging current is charged to electric automobile.
4. a kind of universal charger of electric automobile as claimed in claim 1, it is characterised in that the control circuit, also uses
When the output voltage that itself is detected in the detection module reaches the first given threshold, send the instruction for reducing output current
To the translation circuit, until when the electric current of output is zero, controlling the output switch to disconnect and sending coupling charging net again
The instruction of network is to the communication module.
5. a kind of universal charger of electric automobile as claimed in claim 1, it is characterised in that the communication module, also uses
The reduction electric current first for sending in reception is instructed；
The control circuit, is controlled to reduce electricity to the translation circuit for being instructed according to the reduction electric current first
Stream；
The reduction electric current first is instructed and is generated when arbitrary single-unit voltage of the battery bag reaches the second given threshold, described
Second given threshold is not more than the end of charge voltage of the cell.
6. a kind of universal charger of electric automobile as claimed in claim 1, it is characterised in that the communication module, also uses
The reduction electric current second for sending in reception is instructed；
The control circuit, is controlled to reduce electricity to the translation circuit for being instructed according to the reduction electric current second
Stream；
The reduction electric current second is instructed and is generated when the temperature of any point of the battery bag reaches three given thresholds.
7. a kind of universal charger as claimed in claim 1, it is characterised in that the communication module, is additionally operable to receive and sends
The charging termination instruction for coming；
The control circuit, for instructing according to the charging termination or when detecting charging current and being zero, controlling described defeated
Go out to switch off.
8. a kind of universal charger of the electric automobile as described in any one of claim 1-7, it is characterised in that the change
Changing circuit includes phase shift bridge soft switch circuit and high frequency transformer.
9. the universal charger of a kind of electric automobile as described in any one of claim 1-7, it is characterised in that
The input circuit includes three-phase alternating current input block and current rectifying and wave filtering circuit；
The output circuit includes synchronous rectification filter unit and DC output unit.
10. a kind of universal charger of the electric automobile as described in any one of claim, it is characterised in that the communication
Module is communicated by CAN.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110457498.4A CN113306413B (en) | 2016-08-31 | 2016-08-31 | Direct current charger with communication function suitable for lithium battery |
| CN201610784764.3A CN106451709B (en) | 2016-08-31 | 2016-08-31 | General charger of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610784764.3A CN106451709B (en) | 2016-08-31 | 2016-08-31 | General charger of electric automobile |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110457498.4A Division CN113306413B (en) | 2016-08-31 | 2016-08-31 | Direct current charger with communication function suitable for lithium battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106451709A true CN106451709A (en) | 2017-02-22 |
| CN106451709B CN106451709B (en) | 2021-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610784764.3A Active CN106451709B (en) | 2016-08-31 | 2016-08-31 | General charger of electric automobile |
| CN202110457498.4A Active CN113306413B (en) | 2016-08-31 | 2016-08-31 | Direct current charger with communication function suitable for lithium battery |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110457498.4A Active CN113306413B (en) | 2016-08-31 | 2016-08-31 | Direct current charger with communication function suitable for lithium battery |
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Cited By (1)
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| CN106953384A (en) * | 2017-04-26 | 2017-07-14 | 深圳市得盛电子有限公司 | A kind of charger with communication function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109617199A (en) * | 2018-12-30 | 2019-04-12 | 上海广为美线电源电器有限公司 | Multifunctional charger |
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| Publication number | Publication date |
|---|---|
| CN113306413A (en) | 2021-08-27 |
| CN106451709B (en) | 2021-05-25 |
| CN113306413B (en) | 2022-07-26 |
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