CN112810467B - Energy conversion device and vehicle - Google Patents
Energy conversion device and vehicle Download PDFInfo
- Publication number
- CN112810467B CN112810467B CN201911051235.2A CN201911051235A CN112810467B CN 112810467 B CN112810467 B CN 112810467B CN 201911051235 A CN201911051235 A CN 201911051235A CN 112810467 B CN112810467 B CN 112810467B
- Authority
- CN
- China
- Prior art keywords
- bridge arm
- windings
- group
- arm group
- charging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
- B60L53/122—Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
- H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/0003—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/60—Controlling or determining the temperature of the motor or of the drive
- H02P29/64—Controlling or determining the temperature of the winding
-
- 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
- Y02T10/64—Electric machine technologies in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The present disclosure relates to an energy conversion device and a vehicle, which can be compatible with various direct current charging and discharging modes and have low cost. An energy conversion device comprising an ac machine, a bi-directional PWM inverter, and a switch module, wherein: the alternating current motor comprises x sets of windings, the alternating current motor can run by controlling all the phase windings of each set of windings by adopting a motor vector, and a certain electrical angle theta is staggered among the sets of windings; the bidirectional PWM inverter comprises x groups of bridge arms, each group of bridge arms is connected with one set of windings, and the number of the bridge arms of each group of bridge arms is matched with the number of the phases of the windings connected with the bridge arms; the switch module comprises a first switch submodule and a second switch submodule, wherein the first switch submodule controls the electrical connection between a bus of one group of bridge arms and the direct-current charging and discharging port, and the second switch submodule controls the electrical connection between each group of bridge arms; at least two sets of windings in the x sets of windings and corresponding bridge arm groups form a circuit for charging and discharging the power battery together.
Description
Technical Field
The present disclosure relates to the field of vehicles, and in particular, to an energy conversion device and a vehicle.
Background
At present, the direct current charging of the power battery is generally divided into direct charging and boosting charging. The direct charging means that the positive and negative electrodes of the charging pile are directly connected with the positive and negative buses of the power battery through a contactor or a relay to directly charge the battery, and a voltage boosting or reducing circuit is not arranged in the middle of the charging pile. The boost charging refers to adding a DC/DC bridge circuit capable of boosting and reducing voltage between a charging pile and a positive bus and a negative bus of a power battery.
For direct charging, when the maximum output voltage of the charging pile is lower than the voltage of the power battery, the charging pile cannot charge the power battery. For boost charging, the cost is increased because a DC/DC bridge circuit and corresponding control and detection circuits are separately added. All in all, the compatibility of these dc charging methods is poor.
Disclosure of Invention
The purpose of the disclosure is to provide an energy conversion device and a vehicle, which can be compatible with various direct current charging and discharging modes, and have the advantages of good compatibility and low cost.
According to a first embodiment of the present disclosure, there is provided an energy conversion apparatus including an alternating current motor, a bidirectional PWM inverter, and a switch module, wherein: the alternating current motor comprises x sets of windings, the alternating current motor can run by controlling all the phase windings of each set of windings by adopting a motor vector, and a certain electrical angle theta is staggered among the sets of windings, wherein x is more than or equal to 2, and theta is more than or equal to 0 and less than 360; the bidirectional PWM inverter comprises x groups of bridge arms, each group of bridge arms is connected with one set of windings, and the number of the bridge arms of each group of bridge arms is matched with the number of the phases of the windings connected with the bridge arms; the switch module comprises a first switch submodule and a second switch submodule, wherein the first switch submodule is used for controlling the electrical connection between a bus of one group of bridge arms and a direct-current charging and discharging port, and the second switch submodule is used for controlling the electrical connection between each group of bridge arms; at least two sets of windings in the x sets of windings and corresponding bridge arm groups form a circuit for charging and discharging the power battery together.
Optionally, each phase winding of each set of windings comprises at least one branch coil.
Optionally, the energy conversion apparatus further includes x capacitors, wherein the x capacitors are respectively connected in parallel with the x sets of bridge arms in a one-to-one correspondence.
Optionally, the switch module further comprises a third switch submodule connected between the sets of windings to achieve electrical isolation between the sets of windings under motor drive conditions.
Optionally, the x-th set of windings has m phases x Phase, in the x-th set of windingsEach phase winding includes n x A coil branch of n for each phase winding x The coil branches are connected together to form a phase terminal, and n of each phase winding in the x set of windings x One of the coil branches is also respectively connected with n of other phase windings x One of the coil branches is connected to form n x A connection point, said n x A connection point forming T x A neutral point, said T x Neutral point educes N x A neutral line of which n is x ≥1，m x Not less than 2, and m x ，n x Is an integer, T x The range of (A):
N x the range of (A): t is x ≥N x Not less than 1, and T x 、N x Are all integers.
Optionally, the magnitude of the charging and discharging current is related to a PWM duty ratio of the bridge arm set in the loop.
Optionally, during the step-up charging of the power battery by using the charging pile: the second switch sub-module is disconnected, the upper bridge arm of the first bridge arm group is connected, the lower bridge arm of the second bridge arm group is connected, the upper bridge arm of the second bridge arm group is disconnected, and the charging current flows through the upper bridge arm of the first bridge arm group electrically connected with the anode of the direct-current charging and discharging port from the anode of the direct-current charging and discharging port, the first set of windings electrically connected with the first bridge arm group, the second set of windings electrically connected with the first set of windings, and the lower bridge arm of the second bridge arm group electrically connected with the second set of windings, and then returns to the cathode of the direct-current charging and discharging port, so that energy can be stored in the first set of windings and the second set of windings; after energy storage is finished, the upper bridge arm of the first bridge arm group is switched on, the lower bridge arm of the second bridge arm group is switched off, the upper bridge arm of the second bridge arm group is switched on, and the charging current flows through the upper bridge arm of the first bridge arm group, the first set of windings, the second set of windings, the upper bridge arm of the second bridge arm group, the positive electrode of the power battery and the negative electrode of the power battery from the positive electrode of the direct-current charging and discharging port and then returns to the negative electrode of the direct-current charging and discharging port, so that the power battery is charged by utilizing the energy stored in the first set of windings and the second set of windings through the follow-current function of the windings.
Optionally, during the step-down charging of the power battery by the charging pile: the second switch sub-module is disconnected, the upper bridge arm of the first bridge arm group is connected, the lower bridge arm of the second bridge arm group is connected, the upper bridge arm of the second bridge arm group is disconnected, and the charging current flows through the upper bridge arm of the first bridge arm group electrically connected with the anode of the direct-current charging and discharging port from the anode of the direct-current charging and discharging port, the first set of windings electrically connected with the first bridge arm group, the second set of windings electrically connected with the first set of windings, and the lower bridge arm of the second bridge arm group electrically connected with the second set of windings, and then returns to the cathode of the direct-current charging and discharging port, so that energy can be stored in the first set of windings and the second set of windings; after energy storage is finished, the upper bridge arm of the first bridge arm group is turned off, the lower bridge arm of the second bridge arm group is turned off, the upper bridge arm of the second bridge arm group is turned on, the charging current returns to the first set of winding and the second set of winding from the first set of winding, the second set of winding, the upper bridge arm of the second bridge arm group, the positive electrode of the power battery, the negative electrode of the power battery and the lower bridge arm of the first bridge arm group connected with the negative electrode of the power battery, so that the power battery is charged by utilizing the energy stored in the first set of winding and the second set of winding by utilizing the follow current function of the windings.
Optionally, during the step-up discharge of the power battery to the external electric device: the second switch sub-module is disconnected, the upper bridge arm of the second bridge arm group is connected, the lower bridge arm of the first bridge arm group is connected, the upper bridge arm of the second bridge arm group is disconnected, and a discharging current flows through the upper bridge arm of the second bridge arm group electrically connected with the anode of the power battery, the second set of windings electrically connected with the second bridge arm group, the first set of windings electrically connected with the second set of windings, and the lower bridge arm of the first bridge arm group electrically connected with the first set of windings from the anode of the power battery and then returns to the cathode of the power battery, so that energy can be stored in the first set of windings and the second set of windings; after energy storage is finished, the upper bridge arm of the second bridge arm group is connected with the lower bridge arm and is disconnected, the lower bridge arm of the first bridge arm group is connected with the upper bridge arm in a disconnection mode, the discharging current flows through the upper bridge arm of the second bridge arm group, the second set of windings, the first set of windings, the upper bridge arm of the first bridge arm group and the direct-current charging and discharging port electrically connected with the first bridge arm group from the positive pole of the power battery and then returns to the negative pole of the power battery, and therefore energy stored in the first set of windings and the second set of windings is discharged to the direct-current charging and discharging port by means of the current function of the windings.
Optionally, during the step-down discharging of the external electrical device by the power cell: the second switch sub-module is disconnected, the upper bridge arm of the second bridge arm group is connected, the lower bridge arm of the first bridge arm group is connected, the upper bridge arm of the second bridge arm group is disconnected, and a discharging current flows through the upper bridge arm of the second bridge arm group electrically connected with the anode of the power battery, the second set of windings electrically connected with the second bridge arm group, the first set of windings electrically connected with the second set of windings, and the lower bridge arm of the first bridge arm group electrically connected with the first set of windings from the anode of the power battery and then returns to the cathode of the power battery, so that energy can be stored in the first set of windings and the second set of windings; after energy storage is finished, the upper bridge arm of the second bridge arm group is turned off, the lower bridge arm of the first bridge arm group is turned off, the upper bridge arm is turned on, the discharging current returns to the second winding and the first winding from the second winding, the first winding, the upper bridge arm of the first bridge arm group, the direct-current charging and discharging port electrically connected with the first bridge arm group and the lower bridge arm of the second bridge arm group connected with the negative electrode of the direct-current charging and discharging port, so that energy stored in the first winding and the second winding can be discharged to the direct-current charging and discharging port by utilizing the follow-current function of the windings.
According to a second embodiment of the present disclosure, there is provided a vehicle including the energy conversion apparatus according to the first embodiment of the present disclosure.
By adopting the technical scheme, at least two sets of windings in the x sets of windings and the corresponding bridge arm groups form a loop for charging and discharging the power battery together, so that charging and discharging can be realized by using winding inductance, a DC-DC buck-boost module is not required to be added, and boosting charging and discharging, voltage reduction charging and discharging, direct charging and discharging and wide-voltage-range charging and discharging can be realized only by using the existing motor and electronic control of the existing driving system, so that the compatibility is good, and the cost of the whole vehicle can be reduced.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 shows a schematic block diagram of an energy conversion device according to an embodiment of the present disclosure.
FIG. 2 illustrates yet another schematic block diagram of an energy conversion device according to an embodiment of the present disclosure.
FIG. 3 illustrates yet another schematic block diagram of an energy conversion device according to an embodiment of the present disclosure.
FIG. 4 illustrates yet another schematic block diagram of an energy conversion device according to an embodiment of the present disclosure.
Fig. 5 shows a current flow diagram of a motor inductance energy storage process of direct current boost charging.
Fig. 6 shows a current flow diagram of a motor inductance freewheeling process of dc boost charging.
Fig. 7 shows a current flow diagram of the motor inductance energy storage process of direct current boost discharge.
Fig. 8 shows a current flow diagram of a motor inductance freewheeling process of dc boost discharge.
Fig. 9 shows a power cell cooling and heating circuit schematic according to an embodiment of the present disclosure.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
Fig. 1 shows a schematic block diagram of an energy conversion device according to an embodiment of the present disclosure. As shown in fig. 1, the energy conversion apparatus includes an alternating current motor 11, a bidirectional PWM inverter 12, and a switching module, wherein: the alternating current motor 11 comprises x sets of windings, the alternating current motor can run by controlling all the phase windings of each set of windings by adopting a motor vector, and a certain electrical angle theta is staggered among the sets of windings, wherein x is more than or equal to 2, and theta is more than or equal to 0 and less than 360; the bidirectional PWM inverter 12 comprises x groups of bridge arms, each group of bridge arms is connected with one set of windings, and the number of the bridge arms of each group of bridge arms is matched with the number of the phases of the windings connected with the bridge arms; the switch module comprises a first switch submodule and a second switch submodule, wherein the first switch submodule is used for controlling the electrical connection between a bus of one group of bridge arms and a direct-current charging and discharging port, and the second switch submodule is used for controlling the electrical connection between each group of bridge arms; at least two sets of windings in the x sets of windings and corresponding bridge arm groups form a circuit for charging and discharging the power battery together.
Fig. 1 schematically illustrates that the ac motor 11 includes a first set of windings and a second set of windings, each phase winding of each set of windings including 2 branch coils; the bidirectional PWM inverter 12 includes a first bridge arm group and a second bridge arm group, which are 2 bridge arms in total. The power battery module comprises a power battery E, a switch K1, a switch K2, a resistor R, a switch K3 and a capacitor C1, wherein the positive electrode of the power battery is connected with the first end of a switch K1 and the first end of a switch K2, the second end of the switch K2 is connected with the first end of the resistor R, the second end of the switch K1 and the second end of the resistor R are connected with the first end of the capacitor C1, the negative electrode of the power battery is connected with the first end of the switch K3, the second end of the switch K3 is connected with the second end of the capacitor C1, the first bridge arm group and the second bridge arm group respectively comprise three-phase bridge arms, the first phase of the first bridge arm group comprises a first power switch unit and a second power switch unit which are connected in series, the second phase of the first bridge arm group comprises a third power switch unit and a fourth power switch unit which are connected in series, the third bridge arm of the first bridge arm group comprises a fifth power switch unit and a sixth power switch unit which are connected in series, the input end of the first power switch unit, the input end of the third power switch unit and the input end of the fifth power switch unit are connected to the first end of the switch K7 in common and form a first junction end of the first bridge arm group, the output end of the second power switch unit, the output end of the fourth power switch unit and the output end of the sixth power switch unit are connected to the second end of the capacitor C1 in common and form a second current sink end of the first bridge arm group, the first power switch unit comprises a first upper bridge arm VT1 and a first upper bridge diode VD1, the second power switch unit comprises a second lower bridge arm VT2 and a second lower bridge diode VD2, the third power switch unit comprises a third upper bridge arm VT3 and a third upper bridge diode VD3, the fourth power switch unit comprises a fourth lower bridge arm VT4 and a fourth lower bridge diode VD4, the fifth power switch unit comprises a fifth upper bridge arm VT5 and a fifth upper bridge diode VD5, and the sixth power switch unit comprises a sixth lower bridge arm VT6 and a sixth lower bridge diode VD 6. The power switch unit in this embodiment may also be composed of other power transistors, which is not limited herein.
A first end of a capacitor C3 is connected with a first end of a switch K7, a second end of a capacitor C3 is connected with a second end of a capacitor C1, a second end of a switch K7 is connected with a first end of a capacitor C1, a first phase bridge arm of a second bridge arm group comprises a seventh power switch unit and an eighth power switch unit which are connected in series, a second phase bridge arm of the second bridge arm group comprises a ninth power switch unit and a tenth power switch unit which are connected in series, a third phase bridge arm of the second bridge arm group comprises an eleventh power switch unit and a twelfth power switch unit which are connected in series, an input end of the seventh power switch unit, an input end of the ninth power switch unit and an input end of the eleventh power switch unit are connected with the first end of the capacitor C1 in common and form a first current collection end of the second bridge arm group, an output end of the eighth power switch unit, an output end of the tenth power switch unit and an output end of the twelfth power switch unit are connected with the second end of the capacitor C1 in common and form a second current collection end of the second bridge arm group, the seventh power switch unit comprises a seventh upper bridge arm VT7 and a seventh upper bridge diode VD7, the eighth power switch unit comprises an eighth lower bridge arm VT8 and an eighth lower bridge diode VD8, the ninth power switch unit comprises a ninth upper bridge arm VT9 and a ninth upper bridge diode VD9, the tenth power switch unit comprises a tenth lower bridge arm VT10 and a tenth lower bridge diode VD10, the eleventh power switch unit comprises an eleventh upper bridge arm VT11 and an eleventh upper bridge diode VD11, and the twelfth power switch unit comprises a twelfth lower bridge arm VT12 and a twelfth lower bridge diode VD 12; the first set of windings comprises 2 branch coils, wherein one branch coil comprises coils A1, B1 and C1, and the other branch coil comprises coils A2, B2 and C2, wherein the coil A1 and the coil A2 are connected to the middle point of a first phase bridge arm of the first bridge arm group, the coil B1 and the coil B2 are connected to the middle point of a second phase bridge arm of the first bridge arm group, the coil C1 and the coil C2 are connected to the middle point of a third phase bridge arm of the first bridge arm group, the coil A1, the coil B1 and the coil C1 are connected to form a first connection point n1, and the coil A2, the coil B2 and the coil C2 are connected to form a second connection point n 2; the second set of windings comprises 2 branch coils, wherein one branch coil comprises coils U1, V1 and W1, and the other branch coil comprises coils U2, V2 and W2, wherein the coils U1 and U2 are connected to the middle point of the first phase bridge arm of the second bridge arm group, the coils V1 and V2 are connected to the middle point of the second phase bridge arm of the second bridge arm group, the coils W1 and W2 are connected to the middle point of the third phase bridge arm of the second bridge arm group, the coils U1, V1 and W1 are connected to form a third connection point n3, the coils U2, V2 and W2 are connected to form a fourth connection point n4, and the first connection point n1, the second connection point n2, the third connection point n3 and the fourth connection point n4 are connected to form a neutral point; the DC charging and discharging port is connected with a first end of the switch K9 and a first end of the switch K10, a second end of the switch K9 is connected with a first end of the capacitor C3, and a second end of the switch K10 is connected with a second end of the capacitor C1.
In fig. 1, the first switching submodule includes switches K9 and K10, where switch K9 is connected only to the first bus bar of the first set of legs and switch K10 is connected to the second bus bar of each set of legs.
In fig. 1, the second switch submodule comprises a switch K7, wherein the switch K7 is used to control the electrical connection between the first busbar of the first set of arms and the first busbar of the second set of arms.
In the present disclosure, the number of phases of the x-th set of windings is m x Each phase winding of the x-th set of windings comprises n x A coil branch of n for each phase winding x The coil branches are connected together to form a phase terminal, and n of each phase winding in the x set of windings x One of the coil branches is also respectively connected with n of other phase windings x One of the coil branches is connected to form n x A connection point, said n x A connection point forming T x A neutral point, said T x Neutral point educes N x A neutral line for leading out the neutral line and for connecting the electric machine to the remaining modules, wherein n x ≥1，m x Not less than 2, and m x ，n x Is an integer, T x The range of (A):
N x the range of (A): t is x ≥N x Not less than 1, and T x 、N x Are all integers. For example, as shown in fig. 1, three coil branches a1, B1 and C1 are connected to form a connection point n1, three coil branches a2, B2 and C2 are connected to form a connection point n2, three coil branches U1, V1 and W1 are connected to form a connection point n3, three coil branches U2, V2 and W2 are connected to form a connection point n4, and connection points n1, n2, n3 and n4 are connected together.
In the present disclosure, the ac motor 11 may be a synchronous motor (including a brushless synchronous motor) or an asynchronous motor. The number of phases of the motor is 2 or more, and for example, a three-phase motor, a four-phase motor, a six-phase motor, a nine-phase motor, a fifteen-phase motor, or the like may be used.
By adopting the technical scheme, at least two sets of windings in the x sets of windings and the corresponding bridge arm groups form a loop for charging and discharging the power battery together, so that charging and discharging can be realized by using winding inductance, a DC-DC voltage boosting and reducing module is not required to be added, and charging and discharging in a wide voltage range can be realized only by using the existing motor and electric control of the existing driving system, namely, the charging of the power battery by boosting the external power supply equipment, the charging of the power battery by reducing the voltage of the external power supply equipment, the discharging of the external power equipment by boosting the power battery, the discharging of the external power equipment by reducing the voltage of the power battery, the direct charging and discharging between the power battery and the external equipment and the like, so that the compatibility is good, and the cost of the whole vehicle can be reduced.
In one embodiment, each phase winding of each set of windings includes at least one branch coil, which allows for more flexibility in adjusting the equivalent series inductance of the ac machine.
With continued reference to fig. 1, the energy conversion device further includes x capacitors, wherein the x capacitors are connected in parallel with the x sets of bridge arms, respectively, in a one-to-one correspondence. In fig. 1, a capacitor C3 in parallel with the ABC arm set and a capacitor C1 in parallel with the UVW arm set are exemplarily shown. Capacitors C1 and C3 can be used for energy storage and filtering, and capacitor C3 is also used for interaction with external devices during charging and discharging.
FIG. 2 illustrates yet another schematic block diagram of an energy conversion device according to an embodiment of the present disclosure. Fig. 2 differs from fig. 1 in that connection point n1 is connected to n4 and connection point n2 is connected to n 3. By changing the connection relation between the connection points, the equivalent series inductance of the motor can be changed.
In one embodiment, the switch module further comprises a third switch submodule for electrically isolating the sets of windings under motor drive conditions. As shown in fig. 3, the connection points n1 and n2 of the first set of windings are connected, the connection points n3 and n4 of the second set of windings are connected, and the switch K8 electrically isolates the connection points of the two sets of windings.
FIG. 4 illustrates yet another schematic block diagram of an energy conversion device according to an embodiment of the present disclosure. As shown in fig. 4, the energy conversion device further includes a circuit for realizing ac isolated charging and discharging and a low-voltage battery charging circuit for charging the low-voltage battery, and both circuits use a transformer to realize isolated charging. With the structure shown in fig. 4, the energy conversion device according to the embodiment of the present disclosure can realize both direct current charging and discharging and alternating current charging and discharging. For example, three-phase, single-phase ac boost charging and buck charging, three-phase, single-phase ac discharging, three-phase, single-phase ac charging and discharging, and cooperative control of heating, torque, and the like may be realized.
The principle of dc charging the power battery using the energy conversion apparatus according to the embodiment of the present disclosure will be described next with reference to fig. 5 and 6.
To realize dc charging, energy storage is first required in the motor windings. Fig. 5 shows a schematic diagram of current flow in the process of storing energy by an inductance of a motor by using a charging pile to perform direct-current boosting charging on a power battery. In the energy storage phase, the switch K7 is turned off, the power tubes VT1, VT3, VT5, VT8, VT10 and VT12 are turned on, and the rest of the power tubes are turned off. The flow direction of the energy storage current is as follows: the positive pole of the direct current charging and discharging port → the switch K9 → the power tube VT1, VT3, VT5 → the first set of winding ABC of the alternating current motor → the second set of winding UVW of the alternating current motor → the power tube VT8, VT10, VT12 → the switch K10 → the negative pole of the direct current charging and discharging port. Thus, energy storage of the alternating current motor winding is realized.
After the energy storage phase is finished, a freewheeling process of the motor inductance is performed in order to charge the power battery. Fig. 6 shows a schematic diagram of current flow in a motor inductance freewheeling process for performing dc boost charging on a power battery by using a charging pile. In the freewheeling stage, the power transistors VT1, VT3, VT5 continue to be turned on, and the remaining power transistors are turned off. The flow direction of the freewheeling current is: the positive pole of the direct current charging and discharging port → the switch K9 → the power tubes VT1, VT3 and VT5 → the first set of winding ABC of the alternating current motor → the second set of winding UVW of the alternating current motor → the diodes VD7, VD9, VD11 → the switch K1 → the power battery → the switch K3 → the switch K10 → the negative pole of the direct current charging and discharging port, so that the stored energy of the winding of the alternating current motor can be released to the power battery, and the charging of the power battery is realized.
During the direct current charging process, the magnitude of the charging current of the power battery can be controlled by controlling the magnitude of the PWM duty ratio of the conduction of the power tubes VT8, VT10 and VT 12.
During the period of utilizing the charging pile to carry out voltage reduction charging on the power battery: in the energy storage stage, the second switch submodule, namely the switch K7, is disconnected, the upper bridge arm of the first bridge arm group is switched on, the lower bridge arm of the second bridge arm group is switched on, the upper bridge arm of the first bridge arm group is switched off, the charging current flows through the upper bridge arm of the first bridge arm group electrically connected with the anode of the direct-current charging and discharging port from the anode of the direct-current charging and discharging port, the first set of windings electrically connected with the first bridge arm group, the second set of windings electrically connected with the first set of windings and the lower bridge arm of the second bridge arm group electrically connected with the second set of windings and then returns to the cathode of the direct-current charging and discharging port, so that energy can be stored in the first set of windings and the second set of windings; after the energy storage is finished, the upper bridge arm of the first bridge arm group is turned off, the lower bridge arm of the second bridge arm group is turned on, the lower bridge arm of the second bridge arm group is turned off, the upper bridge arm of the first bridge arm group is turned on, the charging current returns to the first set of winding and the second set of winding from the first set of winding, the second set of winding, the upper bridge arm of the second bridge arm group, the anode of the power battery, the cathode of the power battery and the lower bridge arm of the first bridge arm group connected with the cathode of the power battery, so that the power battery is charged by utilizing the energy stored in the first set of winding and the second set of winding by utilizing the follow current function of the windings.
The principle of dc discharging a power battery using an energy conversion apparatus according to an embodiment of the present disclosure is described next with reference to fig. 7 and 8.
In order to achieve a dc discharge, energy storage is also initially required in the motor windings. Fig. 7 shows a schematic diagram of current flow in the process of storing energy by an inductance of a motor in a manner that a power battery performs direct-current boosting discharge on external electric equipment. In the energy storage phase, the switch K7 is turned off, the power tubes VT7, VT9, VT11, VT2, VT4 and VT6 are turned on, the rest of the power tubes are turned off, and the flow direction of the energy storage current is: the positive pole of the power battery → the switch K1 → the power tubes VT7, VT9 and VT11 → the second set of winding UVW of the alternating current motor → the first set of winding ABC of the alternating current motor → the power tubes VT2, VT4 and VT6 → the switch K3 → the negative pole of the power battery, and the energy storage of the winding of the alternating current motor is realized.
After the energy storage phase is finished, the freewheeling process of the motor inductance is executed in order to discharge the power battery.
Fig. 8 is a schematic diagram showing the current flow in the process of freewheeling of the motor inductor by the power battery for dc boosting discharge of the external power consumption device. In the freewheeling stage, the power transistors VT7, VT9, VT11 continue to be turned on, the remaining power transistors are turned off, and the flow direction of the freewheeling current is: the positive pole of the power battery → the switch K1 → the power tubes VT7, VT9 and VT11 → the second set of winding UVW of the alternating current motor → the first set of winding ABC of the alternating current motor → the diodes VD1, VD3 and VD5 → the switch K9 → the direct current charging and discharging port → the switch K10 → the switch K3 → the negative pole of the power battery, and the stored energy of the winding of the alternating current motor is released to the outside of the direct current charging and discharging port.
During the direct current discharge, the magnitude of the discharge current of the power battery can be controlled by controlling the magnitude of the PWM duty ratio of the conduction of the power tubes VT2, VT14, VT 6.
During the step-down discharge of the power battery to the external electric equipment: the second switch submodule, namely the switch K7, is disconnected, in the energy storage stage, the upper bridge arm of the second bridge arm group is switched on, the lower bridge arm of the first bridge arm group is switched on, the upper bridge arm of the second bridge arm group is switched off, and the discharging current flows from the positive pole of the power battery through the upper bridge arm of the second bridge arm group electrically connected with the positive pole of the power battery, the second set of windings electrically connected with the second bridge arm group, the first set of windings electrically connected with the second set of windings, and the lower bridge arm of the first bridge arm group electrically connected with the first set of windings, and then returns to the negative pole of the power battery, so that energy is stored in the first set of windings and the second set of windings; after the energy storage is finished, the upper bridge arm of the second bridge arm group is turned off, the lower bridge arm of the first bridge arm group is turned off, the upper bridge arm is turned on, the discharging current returns to the second winding and the first winding from the second winding, the first winding, the upper bridge arm of the first bridge arm group, the direct-current charging and discharging port electrically connected with the first bridge arm group and the lower bridge arm of the second bridge arm group connected with the negative electrode of the direct-current charging and discharging port, so that the energy stored in the first winding and the second winding can be discharged to the direct-current charging and discharging port by utilizing the follow-current function of the windings.
According to still another embodiment of the present disclosure, there is provided a vehicle including the energy conversion apparatus provided in the above embodiment.
Fig. 9 shows a power cell cooling and heating circuit schematic according to an embodiment of the present disclosure. As shown in fig. 9, the heating and cooling circuit of the battery pack includes the following circuits: a motor drive system cooling loop, a battery cooling system loop, and an air conditioning system cooling loop. A battery cooling system loop is fused with an air conditioner cooling system through a heat exchange plate; and the battery cooling system loop is communicated with the motor driving system cooling loop through the four-way valve. The motor drive system cooling circuit connects and disconnects the radiator by switching of the three-way valve. The motor driving system cooling loop and the battery cooling system loop are switched through the valve body, the flow direction of cooling liquid in the pipeline is changed, the flow direction of the cooling liquid heated by the motor driving system is enabled to flow to the battery cooling system, and heat is transferred from the motor driving system to the battery cooling; when the motor driving system is in a non-heating mode, the cooling liquid of the motor driving system flows through a loop A and the cooling liquid of the battery cooling system flows through a loop C by switching the three-way valve and the four-way valve; the motor is in a heating mode, the cooling liquid of the motor driving system is switched by the three-way valve and the four-way valve to flow through the loop B, and the purpose that the cooling liquid heated by the motor driving system flows to the battery pack cooling loop to heat the battery is achieved.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. An energy conversion device comprising an ac motor, a bi-directional PWM inverter, and a switch module, wherein:
the alternating current motor comprises x sets of windings, the alternating current motor can run by controlling all phase windings of each set of windings by adopting a motor vector, and a certain electrical angle theta is staggered among the sets of windings, wherein x is more than or equal to 2, and theta is more than or equal to 0 degree and less than 360 degrees;
the bidirectional PWM inverter comprises x groups of bridge arms, each group of bridge arms is connected with one set of windings, and the number of the bridge arms of each group of bridge arms is matched with the number of the phases of the windings connected with the bridge arms;
the switch module comprises a first switch submodule and a second switch submodule, wherein the first switch submodule is used for controlling the electrical connection between a bus of one group of bridge arms and a direct-current charging and discharging port, and the second switch submodule is used for controlling the electrical connection between each group of bridge arms;
at least two sets of windings in the x sets of windings and corresponding bridge arm groups thereof form a circuit for charging and discharging the power battery together;
during the charging period that the power battery is boosted by the charging pile:
the second switch sub-module is disconnected, the upper bridge arm of the first bridge arm group is connected, the lower bridge arm of the second bridge arm group is connected, the upper bridge arm of the second bridge arm group is disconnected, and the charging current flows through the upper bridge arm of the first bridge arm group electrically connected with the anode of the direct-current charging and discharging port from the anode of the direct-current charging and discharging port, the first set of windings electrically connected with the first bridge arm group, the second set of windings electrically connected with the first set of windings, and the lower bridge arm of the second bridge arm group electrically connected with the second set of windings, and then returns to the cathode of the direct-current charging and discharging port, so that energy can be stored in the first set of windings and the second set of windings;
after energy storage is finished, the upper bridge arm of the first bridge arm group is switched on, the lower bridge arm of the second bridge arm group is switched off, the upper bridge arm of the second bridge arm group is switched on, and the charging current flows through the upper bridge arm of the first bridge arm group, the first set of windings, the second set of windings, the upper bridge arm of the second bridge arm group, the positive electrode of the power battery and the negative electrode of the power battery from the positive electrode of the direct-current charging and discharging port and then returns to the negative electrode of the direct-current charging and discharging port, so that the power battery is charged by utilizing the energy stored in the first set of windings and the second set of windings through the follow-current function of the windings.
2. The apparatus of claim 1, wherein each phase winding of each set of windings comprises at least one branch coil.
3. The apparatus of claim 1, wherein the energy conversion apparatus further comprises x capacitors, wherein the x capacitors are connected in parallel with the x sets of bridge arms in a one-to-one correspondence, respectively.
4. The apparatus of claim 1, wherein the switch module further comprises a third switch sub-module connected between the sets of windings to effect electrical isolation between the sets of windings in the motoring operating condition.
5. The apparatus of claim 1, wherein the x-th set of windings has m phases x Each phase winding of the x-th set of windings comprises n x A coil branch of n for each phase winding x The coil branches are connected together to form a phase terminal, and n of each phase winding in the x set of windings x One of the coil branches is also respectively connected with n of other phase windings x One of the coil branches is connected to form n x A connection point, said n x A connection point forming T x A neutral point, said T x Neutral point educes N x A line of neutrality, wherein n x ≥1，m x Not less than 2, and m x ，n x Is an integer, T x The range of (A):
≥T x ≥1，N x the range of (A): t is a unit of x ≥N x Not less than 1, and T x 、N x Are all integers.
6. The apparatus of claim 1, wherein the magnitude of the charging and discharging current is related to a PWM duty cycle of conduction of the bridge arm set in the loop.
7. The apparatus of claim 1, wherein during the step-down charging of the power cell with a charging post:
the second switch sub-module is disconnected, the upper bridge arm of the first bridge arm group is connected, the lower bridge arm of the second bridge arm group is connected, the upper bridge arm of the second bridge arm group is disconnected, and the charging current flows through the upper bridge arm of the first bridge arm group electrically connected with the anode of the direct-current charging and discharging port from the anode of the direct-current charging and discharging port, the first set of windings electrically connected with the first bridge arm group, the second set of windings electrically connected with the first set of windings, and the lower bridge arm of the second bridge arm group electrically connected with the second set of windings, and then returns to the cathode of the direct-current charging and discharging port, so that energy can be stored in the first set of windings and the second set of windings;
after energy storage is finished, the upper bridge arm of the first bridge arm group is turned off, the lower bridge arm of the second bridge arm group is turned off, the upper bridge arm of the second bridge arm group is turned on, the charging current returns to the first set of winding and the second set of winding from the first set of winding, the second set of winding, the upper bridge arm of the second bridge arm group, the positive electrode of the power battery, the negative electrode of the power battery and the lower bridge arm of the first bridge arm group connected with the negative electrode of the power battery, so that the power battery is charged by utilizing the energy stored in the first set of winding and the second set of winding by utilizing the follow current function of the windings.
8. The apparatus of claim 1, wherein during the power cell's boost discharge of the external consumer:
the second switch sub-module is disconnected, the upper bridge arm of the second bridge arm group is connected, the lower bridge arm of the first bridge arm group is connected, the upper bridge arm of the second bridge arm group is disconnected, and a discharging current flows through the upper bridge arm of the second bridge arm group electrically connected with the anode of the power battery, the second set of windings electrically connected with the second bridge arm group, the first set of windings electrically connected with the second set of windings, and the lower bridge arm of the first bridge arm group electrically connected with the first set of windings from the anode of the power battery and then returns to the cathode of the power battery, so that energy can be stored in the first set of windings and the second set of windings;
after energy storage is finished, the upper bridge arm of the second bridge arm group is connected with the lower bridge arm and is disconnected, the lower bridge arm of the first bridge arm group is connected with the upper bridge arm in a disconnection mode, the discharging current flows through the upper bridge arm of the second bridge arm group, the second set of windings, the first set of windings, the upper bridge arm of the first bridge arm group and the direct-current charging and discharging port electrically connected with the first bridge arm group from the positive electrode of the power battery and then returns to the negative electrode of the power battery, and therefore the energy stored in the first set of windings and the second set of windings is discharged to the direct-current charging and discharging port by means of the follow-current function of the windings.
9. The apparatus of claim 1, wherein during the step-down discharge of the power cell to the external consumer:
the second switch sub-module is disconnected, the upper bridge arm of the second bridge arm group is connected, the lower bridge arm of the first bridge arm group is connected, the upper bridge arm of the second bridge arm group is disconnected, and a discharging current flows through the upper bridge arm of the second bridge arm group electrically connected with the anode of the power battery, the second set of windings electrically connected with the second bridge arm group, the first set of windings electrically connected with the second set of windings, and the lower bridge arm of the first bridge arm group electrically connected with the first set of windings from the anode of the power battery and then returns to the cathode of the power battery, so that energy can be stored in the first set of windings and the second set of windings;
after energy storage is finished, the upper bridge arm of the second bridge arm group is turned off, the lower bridge arm of the first bridge arm group is turned off, the upper bridge arm is turned on, the discharging current returns to the second winding and the first winding from the second winding, the first winding, the upper bridge arm of the first bridge arm group, the direct-current charging and discharging port electrically connected with the first bridge arm group and the lower bridge arm of the second bridge arm group connected with the negative electrode of the direct-current charging and discharging port, so that energy stored in the first winding and the second winding can be discharged to the direct-current charging and discharging port by utilizing the follow-current function of the windings.
10. A vehicle, characterized in that the vehicle comprises an energy conversion device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911051235.2A CN112810467B (en) | 2019-10-31 | 2019-10-31 | Energy conversion device and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911051235.2A CN112810467B (en) | 2019-10-31 | 2019-10-31 | Energy conversion device and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112810467A CN112810467A (en) | 2021-05-18 |
| CN112810467B true CN112810467B (en) | 2022-08-09 |
Family
ID=75851411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911051235.2A Active CN112810467B (en) | 2019-10-31 | 2019-10-31 | Energy conversion device and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112810467B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117616618A (en) | 2021-08-05 | 2024-02-27 | 宁德时代新能源科技股份有限公司 | Power battery heating system, control method and control circuit thereof |
| CN115956332A (en) * | 2021-11-22 | 2023-04-11 | 宁德时代新能源科技股份有限公司 | Charging and discharging circuit, system and control method thereof |
| CN117157849A (en) * | 2022-03-09 | 2023-12-01 | 宁德时代新能源科技股份有限公司 | Power battery voltage regulating system, control method and control device thereof |
| CN115378061B (en) * | 2022-05-10 | 2024-02-13 | 宁德时代新能源科技股份有限公司 | Power battery control circuit, system and control method thereof |
| CN115378063B (en) * | 2022-05-23 | 2024-04-09 | 宁德时代新能源科技股份有限公司 | Control method, device, equipment, system and storage medium for charge-discharge circuit |
| CN116587900B (en) * | 2023-07-14 | 2023-11-03 | 江苏速豹动力科技有限公司 | Charging and discharging system of double-motor framework and new energy vehicle |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007043500A1 (en) * | 2005-10-07 | 2007-04-19 | Toyota Jidosha Kabushiki Kaisha | Hybrid automobile and method of controlling the same |
| WO2009051014A1 (en) * | 2007-10-17 | 2009-04-23 | Toyota Jidosha Kabushiki Kaisha | Vehicle, and charging cable |
| JP2009095169A (en) * | 2007-10-10 | 2009-04-30 | Denso Corp | Rotary electric machine |
| JP2013093927A (en) * | 2011-10-24 | 2013-05-16 | Toyota Motor Corp | Relay contact welding detection circuit, vehicle, and relay contact welding detection method |
| WO2013077221A1 (en) * | 2011-11-24 | 2013-05-30 | 日産自動車株式会社 | Power conversion apparatus and charging system |
| CN105762952A (en) * | 2016-04-11 | 2016-07-13 | 天津大学 | Low rotational inertia permanent magnet synchronous servo motor adopting four layer and short pitch distributed windings |
| WO2019039268A1 (en) * | 2017-08-21 | 2019-02-28 | 株式会社デンソー | Dynamoelectric machine control device |
| CN109804552A (en) * | 2016-10-13 | 2019-05-24 | 三菱电机株式会社 | Motor drive, electric motor system and refrigerating circulatory device |
-
2019
- 2019-10-31 CN CN201911051235.2A patent/CN112810467B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007043500A1 (en) * | 2005-10-07 | 2007-04-19 | Toyota Jidosha Kabushiki Kaisha | Hybrid automobile and method of controlling the same |
| JP2009095169A (en) * | 2007-10-10 | 2009-04-30 | Denso Corp | Rotary electric machine |
| WO2009051014A1 (en) * | 2007-10-17 | 2009-04-23 | Toyota Jidosha Kabushiki Kaisha | Vehicle, and charging cable |
| JP2013093927A (en) * | 2011-10-24 | 2013-05-16 | Toyota Motor Corp | Relay contact welding detection circuit, vehicle, and relay contact welding detection method |
| WO2013077221A1 (en) * | 2011-11-24 | 2013-05-30 | 日産自動車株式会社 | Power conversion apparatus and charging system |
| CN105762952A (en) * | 2016-04-11 | 2016-07-13 | 天津大学 | Low rotational inertia permanent magnet synchronous servo motor adopting four layer and short pitch distributed windings |
| CN109804552A (en) * | 2016-10-13 | 2019-05-24 | 三菱电机株式会社 | Motor drive, electric motor system and refrigerating circulatory device |
| WO2019039268A1 (en) * | 2017-08-21 | 2019-02-28 | 株式会社デンソー | Dynamoelectric machine control device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112810467A (en) | 2021-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112810467B (en) | Energy conversion device and vehicle | |
| CN110971173B (en) | Charging method of power battery, motor control circuit and vehicle | |
| CN210225008U (en) | Energy conversion device and vehicle | |
| CN111347893B (en) | Motor control circuit, charging method and heating method of power battery | |
| CN111391719B (en) | Energy conversion device and vehicle | |
| CN111355430B (en) | Motor control circuit, charging and discharging method, heating method and vehicle | |
| CN112398183B (en) | Pre-charging circuit, energy conversion device and vehicle | |
| CN112389234B (en) | Energy conversion device and vehicle | |
| CN112398185B (en) | Energy conversion device and vehicle thereof | |
| CN112389232B (en) | Energy conversion device and vehicle | |
| CN112398184B (en) | Energy conversion device and vehicle | |
| CN112389228B (en) | Energy conversion device and vehicle | |
| CN112389231B (en) | Energy conversion device and vehicle | |
| CN112389214B (en) | Energy conversion device and vehicle | |
| CN112389235B (en) | Energy conversion device and vehicle | |
| CN112389230B (en) | Energy conversion device and vehicle | |
| WO2021027879A1 (en) | Energy conversion apparatus and vehicle | |
| CN112389229B (en) | Energy conversion device and vehicle | |
| CN112389227B (en) | Energy conversion device and vehicle | |
| CN112389209B (en) | Energy conversion device and vehicle | |
| CN112389233B (en) | Energy conversion device and vehicle | |
| CN112751396B (en) | Energy conversion device and vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |