CN214412588U - Auxiliary switching power supply of direct-current charger of electric automobile - Google Patents
Auxiliary switching power supply of direct-current charger of electric automobile Download PDFInfo
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- CN214412588U CN214412588U CN202120863261.1U CN202120863261U CN214412588U CN 214412588 U CN214412588 U CN 214412588U CN 202120863261 U CN202120863261 U CN 202120863261U CN 214412588 U CN214412588 U CN 214412588U
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- 230000006641 stabilisation Effects 0.000 claims description 5
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- 238000001514 detection method Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 23
- 238000004519 manufacturing process Methods 0.000 abstract description 4
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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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
- Y02T90/12—Electric charging stations
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Abstract
The utility model relates to a multichannel isolation output switching power supply, in particular to an auxiliary switching power supply of an electric automobile direct current charger, which shares an alternating current-direct current conversion unit, a switching power supply control unit, a direct current-alternating current conversion unit and a resonance unit and respectively forms a circuit which is output by a main rectification filter unit and a circuit which is output by a plurality of transformers and outputs different voltages by an auxiliary rectification filter unit and an output voltage stabilizing unit; therefore, the utility model discloses an electric automobile direct current charger auxiliary switch power has not only realized the capacity sharing of multiplexed output, makes power cost and power supply volume reduce by a wide margin, has high integrated level, can adapt the demand of present electric automobile direct current charger to different electric automobile BMS power moreover, and then simplified electric automobile direct current charger production technology.
Description
Technical Field
The utility model relates to a multichannel isolation output switching power supply, in particular to electric automobile direct current charger auxiliary switch power supply.
Background
Along with the continuous popularization of electric vehicles, the demand of charging piles is increasing, especially high-power double-gun direct current charger. The direct current charger has less auxiliary switch power supply, on one hand, the direct current charger provides power supply for a control system of the charger, on the other hand, the direct current charger provides auxiliary power supply for a vehicle end, and for the older electric vehicle, the auxiliary power supply needs to be 24V, while the current electric vehicle generally needs to be 12V.
In the prior art, in order to meet the power consumption requirements of all electric vehicles on the market, a charging pile manufacturer has to provide two auxiliary switch power supplies with output voltages for selection, so that a double-gun direct-current charger is generally provided with 5 auxiliary switch power supplies, and at least 3 direct-current chargers only providing 12V auxiliary switch power supplies are required.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the auxiliary switch power supply of the electric automobile direct-current charger integrates multi-path isolated output, and solves the problems that the conventional electric automobile direct-current charger needs a large number of auxiliary switch power supplies, the system is complex, the space occupation is large, the production process is complex and the cost is high.
In order to achieve the above object, the present invention provides the following technical solutions:
an auxiliary switch power supply of a direct current charger of an electric automobile comprises a direct current-alternating current conversion unit, an alternating current-direct current conversion unit and a switch power supply control unit, wherein the alternating current-direct current conversion unit is used for providing direct current for the direct current-alternating current conversion unit, the switch power supply control unit is used for controlling and driving the direct current-alternating current conversion unit, and the auxiliary switch power supply also comprises: the device comprises a resonance unit, a transformer unit, a main rectifying and filtering unit, at least one auxiliary rectifying and filtering unit and at least one output voltage stabilizing unit;
the direct current-alternating current conversion unit is used for providing alternating current with adjustable frequency for the resonance unit; the transformer unit comprises at least two transformers, the primary side of each transformer and the resonance unit form an equivalent LLC resonance circuit, the secondary side of one transformer is connected with the main rectification filter unit to form one output, and the secondary sides of the rest transformers are respectively connected with one auxiliary rectification filter unit and one output voltage stabilizing unit in sequence to form the other output or multi-path output.
In the embodiment, a path of voltage output by the main rectifying and filtering unit and a plurality of paths of voltage output by the auxiliary rectifying and filtering unit and the output voltage stabilizing unit are respectively formed by a plurality of transformers; therefore, the auxiliary switch power supply for the direct current charger of the electric automobile provided by the embodiment not only realizes the capacity sharing of multi-path output, greatly reduces the power supply cost and the power supply volume, has high integration level, but also can adapt to the requirements of the current direct current charger of the electric automobile, and further simplifies the production process of the direct current charger of the electric automobile.
According to a specific embodiment, the utility model discloses an among the electric automobile direct current charger auxiliary switch power, output voltage stabilizing unit includes: the BUCK synchronous voltage reduction control unit, the BUCK power switch unit, the BUCK low-pass filtering unit, the BUCK feedback unit and the BUCK output overvoltage and overcurrent protection unit;
the BUCK power switch comprises a BUCK feedback unit, a BUCK power switch unit and a BUCK output unit, wherein the BUCK feedback unit input end is connected with the BUCK low-pass filtering unit output end, the BUCK feedback unit output end is connected with the BUCK synchronous BUCK control unit input end, the BUCK synchronous BUCK control unit output end is connected with the BUCK power switch unit input end and used for controlling the switching time of the BUCK power switch unit, the BUCK power switch unit output end is connected with the BUCK low-pass filtering unit input end, and the BUCK output overvoltage and overcurrent protection unit is used for outputting overvoltage and overcurrent protection of a voltage stabilizing unit.
According to a specific embodiment, the utility model discloses an electric automobile direct current charger auxiliary switch power still includes: a voltage switching control unit electrically connected to the output voltage stabilizing unit and switching an output voltage by control of receiving an external control signal.
According to a specific implementation mode, the utility model discloses an among the electric automobile direct current charger auxiliary switch power, voltage switch control unit is arranged in controlling output voltage stabilizing unit and switches in two kinds of output voltage.
According to a specific embodiment, the utility model discloses an among the electric automobile direct current charger auxiliary switch power, voltage switching control unit is arranged in the overvoltage protection value and the overcurrent protection value that control switches its output voltage stabilizing unit that corresponds.
According to a specific implementation mode, the utility model discloses an electric automobile direct current charger auxiliary switch power still includes the feedback unit; and the input end of the feedback unit is connected with the output end of the main rectifying and filtering unit, and the output end of the feedback unit is connected with the input end of the switching power supply control unit and is used for feeding back the output voltage of the main rectifying and filtering unit to the switching power supply control unit.
According to a specific implementation mode, the utility model discloses an electric automobile direct current charger auxiliary switch power still includes the protection unit; and the protection unit is respectively connected with the resonance unit, the main rectification filter unit and the switching power supply temperature detection unit, and outputs corresponding signals to the switching power supply control unit according to the resonance current, the output current of the main rectification filter unit and the system temperature signal.
In another specific embodiment, in the auxiliary switching power supply of the electric vehicle dc charger of the present invention, the transformer unit includes three transformers, two auxiliary rectification filter units, and two output voltage stabilization units; the secondary side of one of the transformers is connected with the main rectifying and filtering unit to form one output, and the secondary sides of the other two transformers are respectively connected with the auxiliary rectifying and filtering unit and the output voltage stabilizing unit in sequence to form two paths of independent outputs; two ways independent outputs can correspond and be connected to two electric automobile, can satisfy the demand that the electric pile charges that fills of double gun.
The main rectifying and filtering unit is mainly used for providing a control panel power supply, a touch screen power supply and the like for an electric vehicle charger; the auxiliary rectification filtering unit mainly provides a BMS power supply for the electric automobile after passing through the output voltage stabilizing unit.
The main rectifying and filtering unit output voltage includes, but is not limited to, 5V, 12V, 24V, and preferably 12V.
The voltage output by the auxiliary rectifying and filtering unit through the output voltage stabilizing unit includes but is not limited to 12V and 24V, and the output voltage can be selected between 12V and 24V after being controlled by the voltage switching control unit.
To sum up, compare with prior art, the beneficial effects of the utility model are that:
1. the utility model discloses an electric automobile direct current charger auxiliary switch power supply, sharing AC-DC conversion unit, switching power supply control unit, DC-AC conversion unit and resonance unit to through a plurality of transformers, form the voltage of output through main rectification filter unit all the way and the voltage of multichannel through auxiliary rectification filter unit and output voltage stabilization unit output respectively; therefore, the utility model discloses an electric automobile direct current charger auxiliary switch power has not only realized the capacity sharing of multiplexed output, makes power cost and power supply volume reduce by a wide margin, has high integrated level, can the present electric automobile direct current charger's of adaptation demand moreover, and then simplified electric automobile direct current charger production technology.
2. The utility model discloses an electric automobile direct current charger auxiliary switch power supply, resonance unit and transformer unit adopt the soft switching technique of LLC, and output voltage stabilizing unit and the synchronous step-down technique of BUCK, and whole efficient.
Description of the drawings:
fig. 1 is a block diagram of an auxiliary switching power supply of an electric vehicle dc charger according to embodiment 1 of the present invention.
Fig. 2 is a block diagram of an output voltage stabilization unit according to the present invention.
The labels in the figure are: the device comprises a 1-alternating current-direct current conversion unit, a 2-switching power supply control unit, a 3-direct current-alternating current conversion unit, a 4-LLC resonant circuit, a 41-resonant unit, a 5-transformer unit, a 6-auxiliary rectification filtering unit, a 61-main rectification filtering unit, a 7-feedback unit, an 8-protection unit, a 9-output voltage stabilizing unit, a 10-voltage switching control unit and an 11-external control signal.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter is limited to the following embodiments, and all the technologies realized based on the present invention are within the scope of the present invention.
As shown in fig. 1, the utility model discloses an electric automobile dc charger auxiliary switch power supply contains alternating current-direct current conversion unit 1, switching power supply control unit 2, direct current-alternating current conversion unit 3, resonance unit 41 and transformer unit 5, still contains main rectification filter unit 61, feedback unit 7, protection unit 8, output voltage stabilization unit 9 and voltage switching control unit 10, the input of feedback unit 7 is connected with main rectification filter unit 61 output, the output of feedback unit 7 is connected with switching power supply control unit 2 input; the output end of the alternating current-direct current conversion unit 1 is connected with the input end of the direct current-alternating current conversion unit 3, the direct current-alternating current conversion unit 3 is connected with the switching power supply control unit 2, the input end of the resonance unit 41 is connected with the output end of the direct current-alternating current conversion unit 3, the primary side of the transformer unit 5 is connected with the resonance unit 41, the input end of the auxiliary rectification filter unit 6 is connected with the corresponding secondary side output end of the transformer unit 5, the input end of the output voltage stabilizing unit 9 is connected with the output end of the auxiliary rectification filter unit 6, the voltage switching control unit 10 controls the output voltage of the output voltage stabilizing unit 9, and the voltage switching control unit 10 is controlled by an external control signal 11 according to the required voltage.
The ac-dc conversion unit 1 is configured to provide a dc voltage source for the dc-ac conversion unit 3, and the dc-ac conversion unit 3 is configured to provide an ac voltage source with adjustable frequency for the resonance unit 41.
The output voltage of the main rectifying and filtering unit 61 is a constant voltage, the feedback unit 7 feeds back the output voltage of the main rectifying and filtering unit 61 to the switching power supply control unit, and the switching power supply control unit 2 is used for controlling and driving the dc-ac conversion unit 3.
The transformer unit 5 and the resonance unit 41 form the LLC resonant circuit 4 after being connected in parallel by using the primary exciting inductors of the transformers, the output windings of each transformer of the transformer unit 5 are isolated from each other, and the resonance unit 41 is used for determining the resonant frequency fr of the LLC resonant circuit 4.
Further, the protection unit 8 is respectively connected to the resonance unit 4, the main rectification filter unit 61 and the switching power supply temperature detection unit, and outputs a corresponding signal to the switching power supply control unit according to the resonance current, the output current of the main rectification filter unit and the system temperature signal. The protection unit 8 mainly realizes the functions of over-current protection of resonant current, over-temperature protection of a system and over-current protection of output current of the main rectification filter unit 61.
When the protection unit 8 detects that the resonant current is over-current, or the system temperature is too high, or the main rectification filter unit 61 outputs over-current, the switching power supply control unit 2 turns off the output drive, the direct current-alternating current 3 conversion unit stops working, and the auxiliary switching power supply of the electric vehicle direct current charger stops outputting.
In specific implementation, the transformer unit 5 includes three transformers, the number of the auxiliary rectification filtering units 6 is two, and the number of the output voltage stabilizing units 9 is two; the secondary side of one of the transformers is connected to the main rectifying and filtering unit 61 to form an output circuit, and the secondary sides of the remaining two transformers are respectively connected to the auxiliary rectifying and filtering unit 6 and the output voltage stabilizing unit 9 in sequence to form two independent outputs.
The main rectifying and filtering unit 61 is mainly used for providing a control panel power supply, a touch screen power supply and the like for an electric vehicle charger; the auxiliary rectifying and filtering unit 6 mainly provides a BMS power supply for the electric automobile after passing through the output voltage stabilizing unit 9.
The output voltage of the main rectifying and filtering unit 61 includes, but is not limited to, 5V, 12V, 24V, and preferably 12V. The voltage output by the auxiliary rectifying and filtering unit 6 through the output voltage stabilizing unit 9 includes, but is not limited to, 12V and 24V.
As shown in fig. 2, the output voltage stabilizing unit 9 includes a BUCK synchronous BUCK control unit 91, a BUCK power switch unit 92, a BUCK low-pass filter unit 93, a BUCK feedback unit 94, and a BUCK output overvoltage/overcurrent protection unit 95.
The input end of the BUCK feedback unit 94 is connected with the output end of the BUCK low-pass filtering unit 93, the output end of the BUCK feedback unit 94 is connected with the input end of the BUCK synchronous voltage reduction control unit 91, the output end of the BUCK synchronous voltage reduction control unit 91 is connected with the input end of the BUCK power switch unit 92 and used for controlling the switching time of the BUCK power switch unit 92, the output end of the BUCK power switch unit 92 is connected with the input end of the BUCK low-pass filtering unit 93, and the BUCK output overvoltage and overcurrent protection unit 95 is used for outputting overvoltage and overcurrent protection of the voltage stabilizing unit 9.
The voltage switching control unit 10 is used for controlling the output voltage switching of the output voltage stabilizing unit 9, and the voltage switching control unit 10 is controlled by an external control signal 11 according to the required voltage. For example, after being controlled by the voltage switching control unit 10, the output voltage can be selected between 12V and 24V; when the BMS power of the electric vehicle is selected or detected to be 12V, the output regulator unit 9 outputs the power of 12V; similarly, when the BMS power supply of the electric automobile is selected or detected to be 24V, the output voltage stabilizing unit 9 outputs 24V power supply, and then the demands of different electric automobiles on the BMS power supply are met.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides an electric automobile direct current charger auxiliary switch power supply, includes direct current-alternating current converting unit (3), exchanges-direct current converting unit (1) to and switching power supply control unit (2), its characterized in that still includes: the transformer comprises a resonance unit (41), a transformer unit (5), a main rectifying and filtering unit (61), at least one auxiliary rectifying and filtering unit (6) and at least one output voltage stabilizing unit (9);
the transformer unit (5) comprises at least two transformers, the primary side of each transformer and the resonance unit (41) form an equivalent LLC resonance circuit (4), the secondary side of one transformer is connected with the main rectifying and filtering unit (61) to form one output, and the secondary sides of the rest transformers are respectively connected with the auxiliary rectifying and filtering unit (6) and the output voltage stabilizing unit (9) in sequence to form the other output or multi-path output.
2. The auxiliary switching power supply of the direct current charger of the electric automobile according to claim 1, wherein the output voltage stabilizing unit (9) comprises: the device comprises a BUCK synchronous voltage reduction control unit (91), a BUCK power switch unit (92), a BUCK low-pass filtering unit (93), a BUCK feedback unit (94) and a BUCK output overvoltage and overcurrent protection unit (95);
the input end of the BUCK feedback unit (94) is connected with the output end of the BUCK low-pass filtering unit (93), the output end of the BUCK feedback unit (94) is connected with the input end of the BUCK synchronous voltage reduction control unit (91), the output end of the BUCK synchronous voltage reduction control unit (91) is connected with the input end of the BUCK power switch unit (92) and used for controlling the switching time of the BUCK power switch unit (92), the output end of the BUCK power switch unit (92) is connected with the input end of the BUCK low-pass filtering unit (93), and the BUCK output overvoltage and overcurrent protection unit (95) is used for outputting overvoltage and overcurrent protection of the voltage stabilizing unit (9).
3. The auxiliary switching power supply of the electric vehicle direct-current charger according to claim 2, further comprising: a voltage switching control unit (10) electrically connected to the output voltage stabilizing unit (9) and switching the output voltage by control receiving an external control signal (11).
4. The auxiliary switching power supply of the direct current charger of the electric automobile according to claim 3, characterized in that the voltage switching control unit is used for controlling the output voltage stabilizing unit (9) to switch between two output voltages.
5. The auxiliary switching power supply of the direct current charger of the electric automobile according to claim 4, characterized in that the voltage switching control unit (10) is used for controlling and switching the overvoltage protection value and the overcurrent protection value of the corresponding output voltage stabilization unit (9).
6. The auxiliary switching power supply of the direct current charger of the electric automobile according to claim 1, characterized by further comprising a feedback unit; and the input end of the feedback unit is connected with the output end of the main rectifying and filtering unit (61), and the output end of the feedback unit is connected with the input end of the switching power supply control unit (2) and is used for feeding back the output voltage of the main rectifying and filtering unit (61) to the switching power supply control unit (2).
7. The auxiliary switching power supply of the direct current charger of the electric automobile according to claim 6, characterized by further comprising a protection unit (8); the protection unit (8) is respectively connected with the resonance unit (41), the main rectifying and filtering unit (61) and the switching power supply temperature detection unit, and outputs corresponding signals to the switching power supply control unit (2) according to the resonance current, the output current of the main rectifying and filtering unit and a system temperature signal.
8. The auxiliary switching power supply of the direct current charger of the electric automobile according to any one of claims 1 to 7, wherein the transformer unit comprises three transformers, two auxiliary rectifying and filtering units (6) and two output voltage stabilizing units (9); the secondary side of one transformer is connected with the main rectifying and filtering unit (61) to form one path of output, and the secondary sides of the other two transformers are respectively connected with the auxiliary rectifying and filtering unit (6) and the output voltage stabilizing unit (9) in sequence to form two paths of independent output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120863261.1U CN214412588U (en) | 2021-04-25 | 2021-04-25 | Auxiliary switching power supply of direct-current charger of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120863261.1U CN214412588U (en) | 2021-04-25 | 2021-04-25 | Auxiliary switching power supply of direct-current charger of electric automobile |
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| CN214412588U true CN214412588U (en) | 2021-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120863261.1U Active CN214412588U (en) | 2021-04-25 | 2021-04-25 | Auxiliary switching power supply of direct-current charger of electric automobile |
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- 2021-04-25 CN CN202120863261.1U patent/CN214412588U/en active Active
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Address after: 618000, No.19 Tumenjiang Road, Deyang City, Sichuan Province Patentee after: Sichuan Yingjie New Energy Co.,Ltd. Address before: 618000 northeast corner of Minshan road and Tumenjiang Road, economic development zone, Deyang City, Sichuan Province Patentee before: SICHUAN WEIYU ELECTRIC Co.,Ltd. |
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