CN210101354U - New energy automobile and motor drive and battery charging device thereof - Google Patents
New energy automobile and motor drive and battery charging device thereof Download PDFInfo
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- CN210101354U CN210101354U CN201822241194.0U CN201822241194U CN210101354U CN 210101354 U CN210101354 U CN 210101354U CN 201822241194 U CN201822241194 U CN 201822241194U CN 210101354 U CN210101354 U CN 210101354U
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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
- Y02T90/14—Plug-in electric vehicles
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Abstract
The utility model provides a new energy automobile and motor drive and battery charging device thereof, the device includes motor drive circuit and battery charging circuit, wherein motor drive circuit includes first control module, first switch module, second switch module and three-phase inverter, battery charging circuit includes charging interface module, second control module, voltage conversion module, filtering boost module, charging switch module, third switch module and the three-phase inverter; in the driving mode, all modules in the motor driving circuit work cooperatively to complete the driving of the motor; in the charging mode, all modules in the battery charging circuit work cooperatively to complete charging of the battery, so that motor driving and battery charging are realized, the motor driving and the battery charging are separated, the structure is simple, and the motor driving and battery charging device is small in size and convenient to install.
Description
Technical Field
The utility model relates to an electric automobile technical field especially relates to a new energy automobile and motor drive and battery charging device thereof.
Background
In recent years, new energy vehicles are developed vigorously, and devices integrating driving and high-power alternating-current charging and discharging functions are widely applied. At present, devices integrating the driving and high-power alternating-current charging and discharging functions in the prior art are designed in an integrated mode, so that the devices integrating the driving and high-power alternating-current charging and discharging functions have the defects of large size, difficulty in installation and the like.
In summary, the device integrating the driving and high-power ac charging and discharging functions in the prior art has the problems of large size and difficult installation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a new energy automobile and motor drive and battery charging device thereof to there is the problem of installation difficulty in the device of integrated drive and the high-power alternating-current charging and discharging function among the solution prior art.
The utility model is realized like this, the utility model discloses the first aspect provides a new energy automobile's motor drive and battery charging device, with new energy automobile's power battery and motor are connected, motor drive and battery charging device include: the system comprises a motor driving circuit and a battery charging circuit, wherein the motor driving circuit comprises a first control module, a first switch module, a second switch module and a three-phase inverter; the battery charging circuit comprises a charging interface module, a second control module, a voltage conversion module, a filtering boosting module, a charging switch module, a third switch module and the three-phase inverter;
the first control module and the first switch module are both connected with the three-phase inverter, the three-phase inverter is connected with a second switch module, the first switch module is connected with the power battery and the second control module, and the second switch module is connected with the motor and the second control module; the charging interface module is connected with the charging switch module, the charging switch module is connected with the second control module and the filtering boosting module, the filtering boosting module is connected with the three-phase inverter, the three-phase inverter is connected with the voltage conversion module, the voltage conversion module is connected with the third switch module and the power battery, and the third switch module is connected with the power battery;
when the motor driving and battery charging device works in a driving mode, the second control module controls the first switch module to be conducted with the second switch module and controls the third switch module to be disconnected with the charging switch module, the first control module controls an upper bridge arm switch of the three-phase inverter to be conducted, and the power battery drives the motor through the first switch module, the three-phase inverter and the second switch module;
when the motor driving and battery charging device works in a charging mode, the second control module controls the third switch module and the charging switch module to be connected and controls the first switch module and the second switch module to be disconnected, the first control module controls the lower bridge arm switch of the three-phase inverter to be connected, and alternating current accessed by the charging interface module charges the power battery through the charging switch module, the filtering boosting module, the three-phase inverter, the voltage conversion module and the third switch module.
The utility model discloses the second aspect provides a new energy automobile, new energy automobile includes power battery, motor and first aspect motor drive and battery charging device.
In the present invention, by adopting the motor driving circuit including the one composed of the first control module, the first switch module, the second switch module and the three-phase inverter, and the motor driving and battery charging device of the battery charging circuit composed of the charging interface module, the second control module, the voltage conversion module, the filtering and boosting module, the charging switch module, the third switch module, so that in the driving mode, the second control module controls the conduction of the first switch module and the second switch module, and controls the turn-off of the third switch module and the charging switch module, the first control module controls the conduction of the upper bridge arm switch of the three-phase inverter, and the power battery drives the motor through the first switch module, the three-phase inverter and the second switch module; in a charging mode, the second control module controls the third switch module and the charging switch module to be connected and controls the first switch module and the second switch module to be disconnected, the first control module controls the lower bridge arm switch of the three-phase inverter to be connected, alternating current accessed by the charging interface module charges the power battery through the charging switch module, the filtering boosting module, the three-phase inverter, the voltage conversion module and the third switch module, so that motor driving and battery charging are realized, motor driving and battery charging are separated, the structure is simple, and the motor driving and battery charging device is small in size and convenient to install.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a motor driving and battery charging device of a new energy vehicle according to an embodiment of the present invention;
fig. 2 is another schematic structural diagram of a motor driving and battery charging device of a new energy vehicle according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a motor driving and battery charging device for a new energy vehicle according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
An embodiment of the utility model provides a motor drive and battery charging device, as shown in fig. 1, this motor drive and battery charging device include: a motor driving circuit 1 and a battery charging circuit 2. The motor driving circuit 1 includes a first control module 10, a first switch module 11, a second switch module 12 and a three-phase inverter 13, and the battery charging circuit 2 includes a charging interface module 20, a second control module 21, a voltage conversion module 22, a filtering and boosting module 23, a charging switch module 24, a third switch module 25 and the three-phase inverter 13.
The first control module 10 and the first switch module 11 are both connected with a three-phase inverter 13, the three-phase inverter 13 is connected with a second switch module 12, the first switch module 11 is connected with the power battery 3 and the second control module 21, and the second switch module 12 is connected with the motor 4 and the second control module 21; the charging interface module 20 is connected with the charging switch module 24, the charging switch module 24 is connected with the second control module 21 and the filtering boost module 23, the filtering boost module 23 is connected with the three-phase inverter 13, the three-phase inverter 13 is connected with the voltage conversion module 22, the voltage conversion module 22 is connected with the third switch module 25 and the power battery 3, and the third switch module 25 is connected with the power battery 3.
Specifically, when the motor driving and battery charging device works in a driving mode, the second control module 21 controls the first switch module 11 and the second switch module 12 to be connected, and controls the third switch module 25 and the charging switch module 24 to be disconnected, the first control module 10 controls the upper bridge arm switch of the three-phase inverter 13 to be connected, and the power battery 3 drives the motor 4 through the first switch module 11, the three-phase inverter 13 and the second switch module 12;
when the motor driving and battery charging device works in the charging mode, the second control module 21 controls the third switch module 25 and the charging switch module 24 to be connected, and controls the first switch module 11 and the second switch module to be disconnected 12, the first control module 10 controls the lower bridge arm switch of the three-phase inverter 13 to be connected, and the alternating current accessed by the charging interface module 20 charges the power battery 3 through the charging switch module 24, the filtering and boosting module 23, the three-phase inverter 13, the voltage conversion module 22 and the third switch module 25.
In specific implementation, when the motor driving and battery charging device works in the driving mode, the second control module 21 controls the first switch module 11 and the second switch module 12 to be connected, and controls the third switch module 25 and the charging switch module 24 to be disconnected, the first control module 10 controls the upper bridge arm switch of the three-phase inverter 13 to be connected, at this time, the electric quantity of the power battery 1 is output to the three-phase inverter 13 through the connected first switch module 11, and is output to the motor 4 through the connected second switch module 12 after being processed by the three-phase inverter 13, so as to drive the motor 4 to work.
When the motor driving and charging device works in the charging mode, the second control module 21 controls the third switch module 25 and the charging switch module 24 to be connected, and controls the first switch module 11 and the second switch module 12 to be disconnected, the first control module 10 controls the lower bridge arm switch of the three-phase inverter 13 to be connected, the charging interface module 20 accesses alternating current, the alternating current is output to the filtering and boosting module 23 through the connected charging switch module 24 to be boosted and then output to the three-phase inverter 13, the alternating current is processed by the three-phase inverter 13 and then is subjected to voltage conversion through the voltage conversion module 22, and then the power battery 3 is charged through the connected third switch module 25.
Further, the embodiment of the utility model provides a motor drive and battery charging device still can work and be leaving net belt-load mode, should leave net belt-load mode and discharge the mode promptly, and its specific course of work is the alternating current of the voltage level and the frequency of load demand after changing the electric quantity of power battery 3 via a series of, carries this alternating current to the load via the interface module 20 that charges through the route opposite with the mode of charging, for the load provides the electric energy.
Furthermore, the embodiment of the utility model provides a motor drive and battery charging device still have the vehicle to the function of filling, realize when the vehicle is to filling when this motor drive and battery charging device, all install this motor drive and battery charging device on two vehicles that fill. Specifically, the motor driving and battery charging device on one vehicle converts the electric quantity of the power battery 3 into the alternating current through the discharging process described above, and outputs the alternating current to the charging interface module 20 of the motor driving and battery charging device on the other vehicle through the charging interface module 20, and the motor driving and battery charging device on the other vehicle charges the power battery 3 of the vehicle through the charging process described above after receiving the alternating current, so as to realize the vehicle charging.
In this embodiment, the embodiment of the utility model provides a motor drive and battery charging device is when the drive mode, and each module collaborative work in the motor drive circuit is in order to accomplish the drive of motor, and when the charge mode, the charging of battery is accomplished in each module collaborative work in the battery charging circuit to this realizes motor drive and battery charging, and with the motor drive and the battery separation of charging, and simple structure, make this motor drive small, simple to operate with battery charging device.
In addition, the motor drive and battery charging device can also work in a vehicle charging mode and an off-grid loading mode, so that the motor drive and battery charging device can provide electric energy for a load and charge the vehicle, the functions of the motor drive and battery charging device are enriched, and the applicability of the motor drive and battery charging device is greatly improved.
Further, as a preferred embodiment of the present invention, as shown in fig. 2, the charging switch module 24 includes a first switch unit 240, a second switch unit 241, and a current detection unit 242.
The first switch unit 240 is connected to the charging interface module 20, the second switch unit 241, the current detection unit 242, and the second control module 21, the second switch unit 241 is connected to the current detection unit 242, the charging interface module 20, and the second control module 21, and the current detection unit 242 is connected to the filtering and boosting module 23, the second control module 21, and the charging interface module 20.
Specifically, when the motor driving and battery charging apparatus operates in the charging mode, the current detection unit detects 242 the ac power received by the charging interface module 20, and feeds back the detection result to the second control module 21;
when the ac power accessed by the charging interface module 20 is single-phase ac power, the second control module 21 controls the first switching unit 240 to be in a first conduction state, and controls the second switching unit 241 to be conducted, the single-phase ac power is boosted by the filter boosting module 23 and then output to the three-phase inverter 13, the three-phase inverter 13 rectifies the boosted single-phase ac power into first dc power and outputs the first dc power to the voltage conversion module 22, and the voltage conversion module 22 performs voltage conversion on the first dc power and then charges the power battery 3 through the third switching module 25;
when the ac power accessed by the charging interface module 20 is a three-phase ac power, the second control module 21 controls the first switch unit 240 to be in the second on state, and controls the second switch unit 241 to be turned off, the three-phase ac power is boosted by the filtering boosting module 23 and then output to the three-phase inverter 13, the three-phase inverter 13 rectifies the boosted three-phase ac power into a second dc power and outputs the second dc power to the voltage conversion module 22, and the voltage conversion module 22 performs voltage conversion on the second dc power and then charges the power battery 3 through the third switch module 25.
In the present embodiment, the current detection unit 242 detects the ac power received by the charging interface module 20, so that the second control module 21 performs different on/off controls on the first switch unit 240 and the second switch unit 242 when the ac power is single-phase or three-phase, thereby realizing the switching between single-phase ac power charging and three-phase ac power charging, and enriching the charging mode of the battery charging circuit 2.
Further, as a preferred embodiment of the present invention, as shown in fig. 2, the battery charging circuit 2 further includes a pre-charging module 26, and the pre-charging module 26 is connected to the charging interface module 20, the first switch unit 240, the second switch unit 241, the current detection unit 242, and the second control module 21.
When the motor driving and battery charging apparatus operates in the charging mode, the second control module 21 controls the pre-charging module 26 to pre-charge according to the single-phase alternating current or the three-phase alternating current, so as to prevent the filter boosting module 23 or the first switching unit 240 from being damaged when the single-phase alternating current or the three-phase alternating current is too large.
In the present embodiment, the pre-charging module 26 is disposed in the battery charging circuit 2 of the motor driving and battery charging apparatus, so that the pre-charging module 26 protects the filter boosting module 23 or the first switch unit 240, and the filter boosting module 23 or the first switch unit 240 is prevented from being damaged when the ac power received by the charging interface module 20 is too large, thereby improving the reliability of the circuit, i.e., energy-saving pre-charging before high voltage, and effectively protecting the reliable operation of the whole circuit.
Further, as a preferred embodiment of the present invention, as shown in fig. 2, the battery charging circuit 2 further includes an electric leakage detection module 27, the electric leakage detection module 27 is connected to the charging interface module 20 and the first switch unit with 240 and the pre-charging module 26, and the electric leakage detection module 27 is used for performing electric leakage detection on the single-phase ac power or the three-phase ac power accessed by the charging interface module 20.
Further, as the utility model discloses a preferred embodiment, electric leakage detection module 27 adopts electric leakage hall to realize during concrete implementation.
In the present embodiment, the leakage detecting module 27 is provided in the battery charging circuit 2 of the motor drive and battery charging apparatus, so that the leakage detecting module 27 performs leakage detection on the ac power received by the charging interface module 20, thereby preventing a leakage fault from occurring in the circuit and further improving the reliability of the circuit.
Further, as a preferred embodiment of the present invention, as shown in fig. 2, the battery charging circuit 2 further includes a filtering module 28, the filtering module 28 is connected to the current detection unit 242 and the filtering voltage boosting module 23, and the filtering module 28 is used for filtering the single-phase ac power or the three-phase ac power.
In the present embodiment, the filter module 28 is provided in the battery charging circuit 2 of the motor driving and battery charging apparatus, so that the filter module 28 performs filtering processing on the single-phase alternating current or the three-phase alternating current to prevent noise in the single-phase alternating current or the three-phase alternating current from affecting the single-phase alternating current or the three-phase alternating current.
Further, as a preferred embodiment of the present invention, as shown in fig. 3, the first switch module 11 includes a first switch element K1, a first end of the first switch element K1 is connected to the first positive electrode of the power battery 3, and a second end of the first switch element K1 is connected to the three-phase inverter 13.
In specific implementation, the first switch element K1 is implemented by a single-pole single-throw switch, a first terminal of the single-pole single-throw switch is a first terminal of the first switch element K1, and a second terminal of the single-pole single-throw switch is a second terminal of the first switch element K1; it should be noted that, in the embodiment of the present invention, the first switch element K1 may also be implemented by other devices having a switch function, such as a relay, a switch tube, etc., and is not limited herein.
Further, as a preferred embodiment of the present invention, as shown in fig. 3, the second switch module 12 includes a second switch element K2, a third switch element K3 and a fourth switch element K4.
The first end of the second switching element is connected with the three-phase inverter, and the second end of the second switching element is connected with the motor; a first end of the third switching element is connected with the three-phase inverter, and a second end of the third switching element is connected with the motor; a first end of the fourth switching element is connected to the three-phase inverter, and a second end of the fourth switching element is connected to the motor.
In specific implementation, the second switch element K2, the third switch element K3, and the fourth switch element K4 are implemented by single-pole single-throw switches, a first end of each of the single-pole single-throw switches is a first end of the second switch element K2, the third switch element K3, and the fourth switch element K4, and a second end of each of the single-pole single-throw switches is a second end of the second switch element K2, the third switch element K3, and the fourth switch element K4; it should be noted that, in the embodiment of the present invention, the second switching element K2, the third switching element K3, and the fourth switching element K4 may also be implemented by other devices having a switching function, such as a relay, a switch tube, and the like, and are not limited herein.
Further, as a preferred embodiment of the present invention, as shown in fig. 3, the third switch module 25 includes a fifth switch element K5, a first end of the fifth switch element K5 is connected to the second positive electrode of the power battery 3, and a second end of the fifth switch element K5 is connected to the voltage conversion module 22.
In a specific implementation, the fifth switch element K5 is implemented by a single-pole single-throw switch, a first end of the single-pole single-throw switch is a first end of the fifth switch element K5, and a second end of the single-pole single-throw switch is a second end of the fifth switch element K5; it should be noted that, in the embodiment of the present invention, the fifth switch element K5 may also be implemented by other devices having a switch function, such as a relay, a switch tube, etc., and is not limited herein.
Further, as a preferred embodiment of the present invention, as shown in fig. 3, the first switch unit 240 includes a sixth switch element K6, a seventh switch element K7, and an eighth switch element K8.
A first end of the sixth switching element K6 is connected to the charging interface module 20, and a second end of the sixth switching element K6 is connected to the current detection unit 242; a first end of the seventh switching element K7 is connected to the charging interface module 20, and a second end of the seventh switching element K7 is connected to the current detection unit 242; a first terminal of the eighth switching element K8 is connected to the charging interface module 20, and a second terminal of the eighth switching element K8 is connected to the voltage detection unit 242.
In specific implementation, the sixth switching element K6, the seventh switching element K7, and the eighth switching element K8 are implemented by single-pole single-throw switches, a first end of each of the single-pole single-throw switches is a first end of the sixth switching element K6, the seventh switching element K7, and the eighth switching element K8, and a second end of each of the single-pole single-throw switches is a second end of each of the sixth switching element K6, the seventh switching element K7, and the eighth switching element K8; it should be noted that, in the embodiment of the present invention, the sixth switching element K6, the seventh switching element K7, and the eighth switching element K8 may also be implemented by other devices having a switching function, such as a relay, a switch tube, and the like, which are not limited herein.
Further, as a preferred embodiment of the present invention, as shown in fig. 3, the second switch unit 241 includes a ninth switch element K9, a first end of the ninth switch element K9 is connected to the N-line terminal of the charging interface module 20, and a second end of the ninth switch element K9 is connected to a second end of the seventh switch element K7.
In a specific implementation, the ninth switch element K9 is implemented by a single-pole single-throw switch, a first end of the single-pole single-throw switch is a first end of the ninth switch element K9, and a second end of the single-pole single-throw switch is a second end of the ninth switch element K9; it should be noted that, in the embodiment of the present invention, the ninth switching element K9 may also be implemented by other devices having a switching function, such as a relay, a switch tube, etc., and is not limited herein.
Further, as a preferred embodiment of the present invention, in the specific implementation, the current detection unit 242 is implemented by using a hall device having a voltage detection function.
Further, as a preferred embodiment of the present invention, as shown in fig. 3, the pre-charge module 26 includes a tenth switching element K10, an eleventh switching element K11, a twelfth switching element K12, a first resistor R1, a second resistor R2 and a third resistor R3.
A first end of the tenth switching element K10 is connected to a first end of the eighth switching element K8, a second end of the tenth switching element K10 is connected to a first end of the first resistor R1, and a second end of the first resistor R1 is connected to a second end of the eighth switching element K8; a first terminal of the eleventh switching element K11 is connected to a first terminal of the seventh switching element K7, a second terminal of the eleventh switching element K11 is connected to a first terminal of the second resistor R2, and a second terminal of the second resistor R2 is connected to a second terminal of the seventh switching element K7; a first terminal of the twelfth switching element K12 is connected to a first terminal of the sixth switching element K6, a second terminal of the twelfth switching element K12 is connected to a first terminal of the third resistor R3, and a second terminal of the third resistor R3 is connected to a second terminal of the sixth switching element K6.
In specific implementation, the tenth switching element K10, the eleventh switching element K11, and the twelfth switching element K12 are implemented by single-pole single-throw switches, a first end of each single-pole single-throw switch is a first end of the tenth switching element K10, the eleventh switching element K11, and the twelfth switching element K12, and a second end of each single-pole single-throw switch is a second end of the tenth switching element K10, the eleventh switching element K11, and the twelfth switching element K12; it should be noted that, in the embodiment of the present invention, the tenth switching element K10, the eleventh switching element K11, and the twelfth switching element K12 may also be implemented by other devices having a switching function, such as a relay, a switch tube, and the like, and are not limited herein.
Further, as a preferred embodiment of the present invention, as shown in fig. 3, the filtering module 28 includes a thirteenth switching element K13, a fourteenth switching element K14, a fifteenth switching element K15, a first capacitor C1, a second capacitor C2 and a third capacitor C3.
A first end of the first capacitor C1 is connected to the current detection unit 242, a second end of the first capacitor C1 is connected to a first end of the thirteenth switching element K13, a second end of the thirteenth switching element K13 is connected to the fourteenth switching element K14, the fifteenth switching element K15 and the voltage conversion module 22, a first end of the second capacitor C2 is connected to the current detection unit 242, a second end of the second capacitor C2 is connected to a first end of the fourteenth switching element K14, a first end of the third capacitor C3 is connected to the current detection unit 242, a first end of the third capacitor C3 is connected to the current detection unit 242, and a second end of the third capacitor C3 is connected to a first end of the fifteenth switching element K15.
In a specific implementation, the thirteenth switching element K13, the fourteenth switching element K14, and the fifteenth switching element K15 are implemented by single-pole single-throw switches, a first end of each of the single-pole single-throw switches is a first end of the thirteenth switching element K13, the fourteenth switching element K14, and the fifteenth switching element K15, and a second end of each of the single-pole single-throw switches is a second end of each of the thirteenth switching element K13, the fourteenth switching element K14, and the fifteenth switching element K15; it should be noted that, in the embodiment of the present invention, the thirteenth switching element K13, the fourteenth switching element K14, and the fifteenth switching element K15 may also be implemented by using other devices having a switching function, such as a relay, a switch tube, and the like, and are not limited herein.
Further, as a preferred embodiment of the present invention, as shown in fig. 3, the filtering and voltage boosting module 23 includes a first inductor L1, a second inductor L2 and a third inductor L3, the first end of the first inductor L1 is connected to the first end of the first capacitor C1, the first end of the second inductor L2 is connected to the first end of the second capacitor C2, the first end of the third inductor L3 is connected to the first end of the third capacitor C3, and the second end of the first inductor L1, the second end of the second inductor L2 and the second end of the third inductor L3 are all connected to the voltage conversion module 22.
Further, as a preferred embodiment of the present invention, as shown in fig. 3, the voltage conversion module 22 includes a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a fourth inductor L4, a sixteenth switching element K16 and a seventeenth switching element K17.
Wherein a first terminal of the fourth capacitor C4 is connected to a first terminal of the sixteenth switching element K16, a second terminal of the fourth capacitor C4 is connected to a second terminal of the fifth capacitor C5, and is connected to a second terminal of the thirteenth switching element K13, a second terminal of the fourteenth switching element K14, and a second terminal of the fifteenth switching element K15, a second terminal of the fifth capacitor C5 is connected to a second terminal of the seventeenth switching element K17 and a second terminal of the sixth capacitor, a second terminal of the sixteenth switching element K16 is connected to a first terminal of the seventeenth switching element K17, a first end of the fourth inductor L4 is connected, a second end of the fourth inductor L4 is connected to a second end of the fifth switching element K5 and a first end of the sixth capacitor C6, and control ends of the sixteenth switching element K16 and the seventeenth switching element K17 are both connected to the second control module 21 (the connections are indicated by dashed boxes in the drawing).
In specific implementation, the sixteenth switching element K16 and the seventeenth switching element K17 are implemented by a structure in which a switching tube is connected with a diode in parallel, and the switching tube includes, but is not limited to, a transistor, and other switching devices.
The technical scheme of the utility model is explained through specific circuit structure below:
fig. 3 is a circuit diagram illustrating an example of the motor driving and battery charging apparatus according to the present invention, and for convenience of explaining the motor driving and battery charging apparatus, the connection relationship between the first control module and each switch in the three-phase inverter 13 in fig. 3, and the connection relationship between the second control switch 21 and the switch elements K1 to K17 are not connected one by one, and are only indicated by dotted lines.
Specifically, when the motor driving and battery charging apparatus operates in the motor driving mode, the first control module 10 controls the upper arm switch of the three-phase inverter 13 to be turned on, the second control module 21 controls the first switching element K1 to the fourth switching element K4 to be turned on, and at this time, other switching elements in the circuit are all turned off. The direct current output by the power battery 3 is output to the three-phase inverter 13 through the conductive first switching element K1, and the three-phase inverter 13 converts the direct current into three-phase alternating current and outputs the three-phase alternating current to the motor 4 through the conductive second switching element K2, third switching element K3 and fourth switching element K4, so as to drive the motor 4 to operate.
When the motor driving and battery charging apparatus operates in the charging mode, the first control module 10 controls the lower arm switches of the three-phase inverter 13 to be turned on, and the second control module 21 controls the first switching element K1 to the fourth switching element K4 to be turned off, and controls the fifth switching element K5 to be turned on. In this mode, the charging interface module 20, which is an ac charging interface, receives external ac power, the current detection unit 242 detects the received ac power, and if the ac power is single-phase ac power, the second control module 21 controls the sixth switching element K6, the seventh switching element K7, and the ninth switching element K9 to be closed, the single-phase ac power is output to the boost inductors L1, L2, and L3 through the closed sixth switching element K6 and seventh switching element K7, and is output to the three-phase inverter 13 after being boosted, the three-phase inverter 13 converts the single-phase ac power and outputs the converted single-phase ac power to the voltage conversion circuit including the capacitor C4, the capacitor C5, the capacitor C6, the switching element K16, the switching element K17, and the inductor L4, and the converted voltage is charged to the power battery 3 through the conductive fifth switching element K5.
If the alternating current is a three-phase alternating current, the second control module 21 controls the sixth switching element K6, the seventh switching element K7, and the eighth switching element K8 to be closed, the ninth switching element K9 to be opened, the three-phase alternating current is output to the boosting inductors L1, L2, and L3 through the closed sixth switching element K6, seventh switching element K7, and the floor switching element K8, is boosted by the boosting inductors and output to the three-phase inverter 13, the three-phase inverter 13 converts the three-phase alternating current and outputs the converted three-phase alternating current to the voltage conversion circuit composed of the capacitor C4, the capacitor C5, the capacitor C6, the switching element K16, the switching element K17, and the inductor L4, and the converted voltage is charged to the power battery 3 through the conductive fifth switching element K5.
It should be noted that, in the charging mode, the second control module 21 further controls the tenth switching element K10 to the fifteenth switching element K15 to be in a closed state, so as to pre-charge the circuit composed of the tenth switching element K10, the eleventh switching element K11, the twelfth switching element K12, the first resistor R1, the second resistor R2 and the third resistor R3, and prevent the sixth switching element K6 to the eighth switching element K8 from being damaged by the ac power introduced from the ac charging port; in addition, the filtering and interference rejection circuit composed of the thirteenth switching element K13, the fourteenth switching element K14, the fifteenth switching element K15, the first capacitor C1, the second capacitor C2 and the third capacitor C3 is facilitated to perform filtering and interference rejection processing on the accessed alternating current.
Further, the motor driving and battery charging device also has an offline loading mode and a vehicle opposite charging mode. The off-line loading mode is a discharging mode, the specific working principle of the off-line loading mode is the reverse process of the charging mode, and the working process of the charging mode can be specifically referred to, which is not described herein again; in addition, the vehicle charging mode is substantially that the motor driving and battery charging device disposed on one vehicle operates in the discharging mode, and the motor driving and battery charging device on the other vehicle operates in the charging mode.
In the present invention, by adopting the motor driving circuit including the one composed of the first control module, the first switch module, the second switch module and the three-phase inverter, and the motor driving and battery charging device of the battery charging circuit composed of the charging interface module, the second control module, the voltage conversion module, the filtering and boosting module, the charging switch module, the third switch module, so that in the driving mode, the second control module controls the conduction of the first switch module and the second switch module, and controls the turn-off of the third switch module and the charging switch module, the first control module controls the conduction of the upper bridge arm switch of the three-phase inverter, and the power battery drives the motor through the first switch module, the three-phase inverter and the second switch module; in a charging mode, the second control module controls the third switch module and the charging switch module to be connected and controls the first switch module and the second switch module to be disconnected, the first control module controls the lower bridge arm switch of the three-phase inverter to be connected, alternating current accessed by the charging interface module charges the power battery through the charging switch module, the filtering boosting module, the three-phase inverter, the voltage conversion module and the third switch module, so that motor driving and battery charging are realized, motor driving and battery charging are separated, the structure is simple, and the motor driving and battery charging device is small in size and convenient to install.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a new energy automobile's motor drive and battery charging device, with new energy automobile's power battery and motor are connected, its characterized in that, motor drive and battery charging device include: the system comprises a motor driving circuit and a battery charging circuit, wherein the motor driving circuit comprises a first control module, a first switch module, a second switch module and a three-phase inverter; the battery charging circuit comprises a charging interface module, a second control module, a voltage conversion module, a filtering boosting module, a charging switch module, a third switch module and the three-phase inverter;
the first control module and the first switch module are both connected with the three-phase inverter, the three-phase inverter is connected with a second switch module, the first switch module is connected with the power battery and the second control module, and the second switch module is connected with the motor and the second control module; the charging interface module is connected with the charging switch module, the charging switch module is connected with the second control module and the filtering boosting module, the filtering boosting module is connected with the three-phase inverter, the three-phase inverter is connected with the voltage conversion module, the voltage conversion module is connected with the third switch module and the power battery, and the third switch module is connected with the power battery;
when the motor driving and battery charging device works in a driving mode, the second control module controls the first switch module to be conducted with the second switch module and controls the third switch module to be disconnected with the charging switch module, the first control module controls an upper bridge arm switch of the three-phase inverter to be conducted, and the power battery drives the motor through the first switch module, the three-phase inverter and the second switch module;
when the motor driving and battery charging device works in a charging mode, the second control module controls the third switch module and the charging switch module to be connected and controls the first switch module and the second switch module to be disconnected, the first control module controls the lower bridge arm switch of the three-phase inverter to be connected, and alternating current accessed by the charging interface module charges the power battery through the charging switch module, the filtering boosting module, the three-phase inverter, the voltage conversion module and the third switch module.
2. The motor driving and battery charging apparatus as claimed in claim 1, wherein the charging switch module comprises a first switch unit, a second switch unit, and a current detection unit;
the first switch unit is connected with the charging interface module, the second switch unit, the current detection unit and the second control module, the second switch unit is connected with the current detection unit, the charging interface module and the second control module, and the current detection unit is connected with the filtering boosting module, the second control module and the charging interface module;
when the motor driving and battery charging device works in a charging mode, the current detection unit detects the alternating current accessed by the charging interface module and feeds back a detection result to the second control module;
when the alternating current accessed by the charging interface module is single-phase alternating current, the second control module controls the first switch unit to be in a first conduction state and controls the second switch unit to be conducted, the single-phase alternating current is boosted by the filtering and boosting module and then output to the three-phase inverter, the three-phase inverter rectifies the boosted single-phase alternating current into first direct current and outputs the first direct current to the voltage conversion module, and the voltage conversion module performs voltage conversion on the first direct current and then charges the power battery through the third switch module;
when the alternating current accessed by the charging interface module is three-phase alternating current, the second control module controls the first switch unit to be in a second conduction state and controls the second switch unit to be disconnected, the three-phase alternating current is boosted by the filtering boosting module and then output to the three-phase inverter, the three-phase inverter rectifies the boosted three-phase alternating current into second direct current and outputs the second direct current to the voltage conversion module, and the voltage conversion module performs voltage conversion on the second direct current and then charges the power battery through the third switch module.
3. The motor driving and battery charging apparatus of claim 2, wherein the battery charging circuit further comprises a pre-charging module, the pre-charging module is connected to the charging interface module, the first switch unit, the second switch unit, the current detection unit, and the second control module;
when the motor driving and battery charging device works in a charging mode, the second control module controls the pre-charging module to pre-charge according to the single-phase alternating current or the three-phase alternating current so as to prevent the filtering and boosting module or the first switch unit from being damaged when the single-phase alternating current or the three-phase alternating current is too large.
4. The motor driving and battery charging apparatus as claimed in claim 3, wherein the battery charging circuit further comprises a leakage detection module, the leakage detection module is connected to the charging interface module, the first switch unit and the pre-charging module, and the leakage detection module is configured to perform leakage detection on the single-phase ac power or the three-phase ac power received by the charging interface module.
5. The motor driving and battery charging apparatus according to any one of claims 2 to 4, wherein the battery charging circuit further comprises a filtering module, the filtering module is connected to the current detecting unit and the filtering and boosting module, and the filtering module is configured to filter the single-phase alternating current or the three-phase alternating current.
6. The motor driving and battery charging apparatus of claim 1, wherein the first switching module comprises a first switching element, a first end of the first switching element is connected to the first positive electrode of the power battery, and a second end of the first switching element is connected to the three-phase inverter.
7. The motor driving and battery charging apparatus of claim 1, wherein the second switching module comprises a second switching element, a third switching element, and a fourth switching element;
a first end of the second switching element is connected to the three-phase inverter, and a second end of the second switching element is connected to the motor; a first end of the third switching element is connected to the three-phase inverter, and a second end of the third switching element is connected to the motor; a first end of the fourth switching element is connected to the three-phase inverter, and a second end of the fourth switching element is connected to the motor.
8. The motor driving and battery charging apparatus of claim 1, wherein the third switching module comprises a fifth switching element, a first end of the fifth switching element is connected to the second positive electrode of the power battery, and a second end of the fifth switching element is connected to the voltage conversion module.
9. The motor driving and battery charging apparatus as claimed in claim 2, wherein the first switching unit includes a sixth switching element, a seventh switching element, and an eighth switching element;
a first end of the sixth switching element is connected with the charging interface module, and a second end of the sixth switching element is connected with the current detection unit; a first end of the seventh switching element is connected with the charging interface module, and a second end of the seventh switching element is connected with the current detection unit; the first end of the eighth switch element is connected with the charging interface module, and the second end of the eighth switch element is connected with the current detection unit.
10. A new energy automobile, characterized in that the new energy automobile comprises a power battery, an electric motor and the motor driving and battery charging device of any one of claims 1 to 9.
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| CN201822241194.0U CN210101354U (en) | 2018-12-28 | 2018-12-28 | New energy automobile and motor drive and battery charging device thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109606156A (en) * | 2018-12-28 | 2019-04-12 | 深圳电擎科技有限公司 | A kind of new-energy automobile and its motor driven and battery charger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109606156A (en) * | 2018-12-28 | 2019-04-12 | 深圳电擎科技有限公司 | A kind of new-energy automobile and its motor driven and battery charger |
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Address after: A1002, Plant 2, Longgang Tian'an Digital Innovation Park, No. 449, Huangge North Road, Huanggekeng Community, Longcheng Street, Longgang District, Shenzhen, Guangdong 518000 Patentee after: Shenzhen Zhongding Intellectual Property Innovation Development Co.,Ltd. Address before: 518000 4th Floor, Chengtou Business Center, Qinglin West Road, Longgang District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Zhongding Technology Service Co.,Ltd. |