CN108767951A - A kind of DC charging system for electromobile battery - Google Patents
A kind of DC charging system for electromobile battery Download PDFInfo
- Publication number
- CN108767951A CN108767951A CN201810558304.8A CN201810558304A CN108767951A CN 108767951 A CN108767951 A CN 108767951A CN 201810558304 A CN201810558304 A CN 201810558304A CN 108767951 A CN108767951 A CN 108767951A
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- China
- Prior art keywords
- voltage
- charging
- dropping type
- output end
- filter
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Links
- 238000009826 distribution Methods 0.000 claims abstract description 20
- 238000001914 filtration Methods 0.000 claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims abstract description 14
- 238000004146 energy storage Methods 0.000 claims abstract description 11
- 238000004804 winding Methods 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 4
- 230000002459 sustained effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
-
- H02J7/022—
-
- 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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
Abstract
The invention discloses a kind of DC charging system for electromobile battery, which includes：Distribution transformer and direct-current charging post；Direct-current charging post includes charging pile controller and voltage-dropping type high-frequency PWM current rectifying and wave filtering circuit；Public medium voltage distribution network is accessed in high-pressure side of distribution transformer, and secondary low-voltage side is connected with voltage-dropping type (Buck) high-frequency PWM current rectifying and wave filtering circuit input terminal, and voltage-dropping type high-frequency PWM rectification filter circuit output end is connect with direct-current charging post charging interface；Rectifier bridge positive output end is connected with fly-wheel diode cathode and energy storage inductor one end, and the energy storage inductor other end is connected with filter capacitor anode；Rectifier bridge negative output terminal is connected with fly-wheel diode anode and filter capacitor cathode；Charging pile controller output end is connect with switching tube.The invention can reduce the complexity of charging pilework and circuit, device own loss be reduced, to reduce cost.
Description
Technical field
The present invention relates to boost battery charge technical fields, especially a kind of DC charging for electromobile battery
System.
Background technology
To meet electromobile battery quick charge requirement, need to use DC charging device.Currently, direct-current charging post is adopted
It is realized with Switching Power Supply, influenced by the performance of electronic device, the capacity of single switch power supply is relatively small, cannot be satisfied large capacity
The quick charge requirement of accumulator, therefore existing direct-current charging post is formed by multiple switch power sources in parallel, control device according to
The charge requirement of accumulator carries out power distribution to the Switching Power Supply of each parallel connection.Switching Power Supply passes through height using Boost rectifications
Frequency power transformer carries out electrical isolation to input and output, and the power electronic devices that above-mentioned apparatus uses is more, and wiring is complicated, itself dress
It is larger to set loss, it is higher so as to cause cost.
Invention content
The object of the present invention is to provide a kind of DC charging systems for electromobile battery, can reduce charging pile
The complexity of structure and circuit reduces device own loss, to reduce cost.
To achieve the above object, the present invention provides following schemes：
A kind of DC charging system for electromobile battery, including distribution transformer and direct-current charging post；
The distribution transformer includes a high-pressure side and secondary low-voltage side, and the direct-current charging post includes charging pile control
Device and voltage-dropping type high-frequency PWM current rectifying and wave filtering circuit；
The voltage-dropping type high-frequency PWM current rectifying and wave filtering circuit includes filter, rectifier bridge and filter circuit, the filter packet
Filter inductance and storage capacitor are included, the rectifier bridge includes six rectifying bridge arms, and each rectifying bridge arm is switched by one
Pipe and a Diode series form；The filter circuit includes fly-wheel diode, energy storage inductor and filter capacitor；
Public medium voltage distribution network is accessed in high-pressure side, and the secondary low-voltage side and the voltage-dropping type high-frequency PWM are whole
The input terminal for flowing filter circuit is connected, and is powered to the voltage-dropping type high-frequency PWM rectification circuit；The voltage-dropping type high-frequency PWM
The output end of current rectifying and wave filtering circuit is connect with the charging interface of the direct-current charging post；
The positive output end of the rectifier bridge is connected with one end of the cathode of the fly-wheel diode and the energy storage inductor,
The other end of the energy storage inductor is connected with the anode of the filter capacitor；The negative output terminal of the rectifier bridge and the afterflow two
The cathode of the positive and described filter capacitor of pole pipe is connected；
The output end of the charging pile controller is connect through isolation drive with the switching tube, for controlling the voltage-dropping type
The conducting and cut-off of switching tube in high-frequency PWM current rectifying and wave filtering circuit.
Optionally, the output end of the charging pile controller is connected with the grid of the switching tube.
Optionally, the secondary low-voltage side is at least one three-phase secondary winding.
Optionally, the three-phase secondary winding low-pressure side voltage is non-nominal voltage.
According to specific embodiment provided by the invention, the invention discloses following technique effects：
The present invention provides a kind of DC charging systems for electromobile battery, using distribution transformer and voltage-dropping type
High-frequency PWM current rectifying and wave filtering circuit combines, and avoids the use of switch power high-frequency transformer, reduces the use number of component
Amount, reduces the investment of charging unit.Voltage-dropping type high-frequency PWM rectification circuit input voltage is higher, makes switching tube, diode circuit
Electric current reduces, and reduces device own loss.And capacity can be expanded by multigroup (Buck) rectification circuit parallel connection.
Description of the drawings
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of principle assumption diagram of DC charging system for electromobile battery of the embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of DC charging systems for electromobile battery, can reduce charging pile
The complexity of structure and circuit reduces device own loss, to reduce cost.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
Fig. 1 is a kind of principle assumption diagram of DC charging system for electromobile battery of the embodiment of the present invention.Such as Fig. 1
It is shown, a kind of DC charging system for electromobile battery, including distribution transformer and direct-current charging post；
The distribution transformer 1 includes a high-pressure side 11 and secondary low-voltage side 12, and the direct-current charging post includes charging
Stake controller and voltage-dropping type high-frequency PWM current rectifying and wave filtering circuit；
The voltage-dropping type high-frequency PWM current rectifying and wave filtering circuit includes filter, rectifier bridge and filter circuit, the filter packet
Filter inductance L1, L2, L3 and storage capacitor C1, C2, C3 are included, the rectifier bridge includes six rectifying bridge arms, each rectification
Bridge arm is all connected in series by a switching tube and a rectifier diode；The filter circuit includes sustained diode 7, energy storage
Inductance L4 and filter capacitor C4；
Public medium voltage distribution network, the secondary low-voltage side 12 and the voltage-dropping type high frequency are accessed in high-pressure side 11
The input terminal of PWM current rectifying and wave filtering circuits is connected, and is powered to the voltage-dropping type high-frequency PWM rectification circuit；The voltage-dropping type is high
The output end of frequency PWM current rectifying and wave filtering circuits is connect with the charging interface of the direct-current charging post；
The positive output end of the rectifier bridge and the cathode of the sustained diode 7 and one end of the energy storage inductor L4
It is connected, the other end of the energy storage inductor L4 is connected with the anode of the filter capacitor C4；The negative output terminal of the rectifier bridge with
The cathode of the positive and described filter capacitor C4 of the sustained diode 7 is connected；
The output end of the charging pile controller is by isolation drive circuit and described switching tube V1, V2, V3, V4, V5, V6
Connection, for controlling the conducting of switching tube V1, V2, V3, V4, V5, V6 in the voltage-dropping type high-frequency PWM current rectifying and wave filtering circuit and cutting
Only.
Grid of the output end of the charging pile controller through isolation drive Yu described switching tube V1, V2, V3, V4, V5, V6
It is connected.
The secondary low-voltage side 12 is at least one three-phase secondary winding.
The three-phase secondary winding low-pressure side voltage is non-nominal voltage.
Specific implementation mode one：The secondary low-voltage side 12 that the distribution transformer is arranged is a three-phase secondary winding, directly
Current charge stake is multiple, and the non-nominal voltage that secondary low-voltage side 12 exports can meet battery charging requirement simultaneously, meet power
Factor control requires, and meets voltage ripple of power network 15% and requires, the modulating wave control switching tube V1 of charging pile controller output,
The grid of V2, V3, V4, V5, V6 complete the control to rectification circuit output current size and input power factor by PWM modulation
System, filter circuit make current ripples situation reach the demand that electromobile battery charges.Specifically, charging pile controller is according to storage
The charging strategy and power factor controlling of battery require modulation carrier wave pulsewidth, control switching tube V1, V2 in rectification circuit, V3, V4,
The conducting and cut-off of V5, V6, entire DC charging system device are charged by leading-out terminal U1 to electromobile battery.
Specific implementation two：The difference of present embodiment and specific implementation mode one is the secondary low-voltage of the distribution transformer
Side 12 is provided with multiple three-phase secondary windings, and the quantity of direct-current charging post is identical as the quantity of three-phase secondary winding.It is other with
Specific implementation mode one is identical.
The present invention is combined using voltage-dropping type (Buck) high-frequency PWM fairing with special distribution transformer 1, distribution transformer
The low-pressure side voltage of device is non-nominal voltage, and for powering to voltage-dropping type (Buck) high-frequency PWM fairing, voltage value is
Meet battery charging requirement simultaneously, meet power factor controlling requirement, meets the requirement of voltage ripple of power network 15%；Distribution transformer
The electric current of low-pressure side exports charging current after rectifying and wave-filtering, avoids the use of switch power high-frequency transformer, reduces
Component number reduces the investment of charging unit；(Buck) high-frequency PWM rectification circuit input voltage is higher, and equal-wattage makes
Switching tube, diode circuit electric current reduce, and reduce device own loss and can be by multigroup (Buck) rectification circuit simultaneously
Connection, which expands capacity, can reduce the complexity of charging pilework and circuit, and stake investment is built in reduction.
Principle and implementation of the present invention are described for specific case used herein, and above example is said
The bright method and its core concept for being merely used to help understand the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (5)
1. a kind of DC charging system for electromobile battery, which is characterized in that including distribution transformer and DC charging
Stake；
The distribution transformer include a high-pressure side and secondary low-voltage side, the direct-current charging post include charging pile controller and
Voltage-dropping type high-frequency PWM current rectifying and wave filtering circuit；
The voltage-dropping type high-frequency PWM current rectifying and wave filtering circuit includes filter, rectifier bridge and filter circuit, and the filter includes filter
Wave inductance and storage capacitor, the rectifier bridge include six rectifying bridge arms, each rectifying bridge arm by a switching tube and
One Diode series forms；The filter circuit includes fly-wheel diode, energy storage inductor and filter capacitor；
Public medium voltage distribution network, the secondary low-voltage side and the voltage-dropping type high frequency are accessed in high-pressure side of the distribution transformer
The input terminal of PWM current rectifying and wave filtering circuits is connected, and is powered to the voltage-dropping type high-frequency PWM rectification circuit；The voltage-dropping type is high
The output end of frequency PWM current rectifying and wave filtering circuits is connect with the charging interface of the direct-current charging post；
The output end of the charging pile controller is connect through isolation drive with the switching tube, for controlling the voltage-dropping type high frequency
The conducting and cut-off of switching tube in PWM current rectifying and wave filtering circuits.
2. a kind of DC charging system for electromobile battery according to claim 1, which is characterized in that described to fill
The output end of electric stake controller is connected through isolation drive with the grid of the switching tube.
3. a kind of DC charging system for electromobile battery according to claim 1, which is characterized in that described whole
The positive output end of stream bridge is connected with one end of the cathode of the fly-wheel diode and the energy storage inductor, the energy storage inductor
The other end is connected with the anode of the filter capacitor；The anode of the negative output terminal of the rectifier bridge and the fly-wheel diode and
The cathode of the filter capacitor is connected.
4. a kind of DC charging system for electromobile battery according to claim 1, which is characterized in that described two
Secondary low-pressure side is at least one three-phase secondary winding.
5. a kind of DC charging system for electromobile battery according to claim 4, which is characterized in that described three
Phase secondary winding low-pressure side voltage is while meeting battery charging requirement, power factor controlling requirement and voltage ripple of power network
15% desired non-nominal voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810558304.8A CN108767951A (en) | 2018-06-01 | 2018-06-01 | A kind of DC charging system for electromobile battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810558304.8A CN108767951A (en) | 2018-06-01 | 2018-06-01 | A kind of DC charging system for electromobile battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108767951A true CN108767951A (en) | 2018-11-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810558304.8A Pending CN108767951A (en) | 2018-06-01 | 2018-06-01 | A kind of DC charging system for electromobile battery |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111674275A (en) * | 2020-06-18 | 2020-09-18 | 薛洛良 | Electric vehicle direct current charging system adopting transformer to output 1250V voltage |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101582648A (en) * | 2009-06-15 | 2009-11-18 | 魏晓亮 | Rectifier circuit |
| US20130020989A1 (en) * | 2011-07-21 | 2013-01-24 | Delta Electronics (Shanghai) Co., Ltd. | Ac-dc power converter and dc charging station thereof |
| CN104852444A (en) * | 2015-05-05 | 2015-08-19 | 深圳晶福源科技股份有限公司 | DC charging device for electric automobiles |
| CN107839525A (en) * | 2017-10-25 | 2018-03-27 | 安徽中科海奥电气股份有限公司 | A kind of 10KV inputs multichannel rectification copped wave integration charging station |
| CN207173336U (en) * | 2017-09-07 | 2018-04-03 | 薛洛良 | A kind of DC charging device for electromobile battery |
-
2018
- 2018-06-01 CN CN201810558304.8A patent/CN108767951A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101582648A (en) * | 2009-06-15 | 2009-11-18 | 魏晓亮 | Rectifier circuit |
| US20130020989A1 (en) * | 2011-07-21 | 2013-01-24 | Delta Electronics (Shanghai) Co., Ltd. | Ac-dc power converter and dc charging station thereof |
| CN104852444A (en) * | 2015-05-05 | 2015-08-19 | 深圳晶福源科技股份有限公司 | DC charging device for electric automobiles |
| CN207173336U (en) * | 2017-09-07 | 2018-04-03 | 薛洛良 | A kind of DC charging device for electromobile battery |
| CN107839525A (en) * | 2017-10-25 | 2018-03-27 | 安徽中科海奥电气股份有限公司 | A kind of 10KV inputs multichannel rectification copped wave integration charging station |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111674275A (en) * | 2020-06-18 | 2020-09-18 | 薛洛良 | Electric vehicle direct current charging system adopting transformer to output 1250V voltage |
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Application publication date: 20181106 |
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| RJ01 | Rejection of invention patent application after publication |