Power supply control device, power system, power supply control method and vehicle

Abstract

The invention relates to a power supply control device, a power system, a power supply control method and a vehicle. The power supply control device comprises a first three-phase inverter, a first three-phase motor, a second three-phase inverter, a second three-phase motor, a first switch module and a control module. The first switch module is electrically connected with the first three-phase motor, the second three-phase motor and the control module and is used for being electrically connected with a charging power supply; the control module is used for controlling the on-off state of the first switch module, so that at least one phase winding in the first three-phase motor and at least one phase winding in the second three-phase motor are connected in series based on the conduction state of the first three-phase inverter and the second three-phase inverter, and a boost charging loop between the charging power supply and the power battery is formed. The dual motors and the corresponding dual inverters of the vehicle are reused through the control module and the first switch module, so that the purpose of boosting when the power battery is charged is achieved, the integration of the vehicle is improved, and the cost and the size of the vehicle are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of power supply control, and particularly to a power supply control device, a power system, a power supply control method, and a vehicle. Background Art

[0002] In modern electric vehicles and energy storage systems, power batteries usually have relatively high voltage requirements to support their efficient operation and energy storage. However, the voltage provided by an external charging power supply may not match the voltage required by the power battery. Therefore, it is necessary to use a boost circuit.

[0003] The boost circuit ensures the effective utilization of energy by boosting a lower input voltage to a level suitable for battery charging. By processing the external power supply through the boost circuit, not only the problem of voltage mismatch is solved, but also the charging efficiency and safety are optimized. This enables the power battery to store energy efficiently and safely, supporting the high-performance operation of electric vehicles and other energy storage requirements.

[0004] However, existing solutions usually additionally set a corresponding boost circuit to achieve the purpose of boosting when charging the power battery, but this will increase the cost and volume of the electric vehicle. Summary of the Invention

[0005] Embodiments of the present application provide a power supply control device, a power system, a power supply control method, and a vehicle. By controlling a control module and a first switch module to reuse the dual motors and corresponding dual inverters of the vehicle, the purpose of boosting when charging the power battery is achieved, improving the integration of the vehicle to at least partially solve the above technical problems.

[0006] To achieve the above object, according to the first aspect of the present application, a power supply control device is provided, including a first three-phase inverter, a first three-phase motor, a second three-phase inverter, a second three-phase motor, a first switch module, and a control module;

[0007] The first three-phase motor is used to be electrically connected to the power battery through the first three-phase inverter, the second three-phase motor is used to be electrically connected to the power battery through the second three-phase inverter, and the first switch module is respectively electrically connected to the first three-phase motor, the second three-phase motor, and the control module and is used to be electrically connected to the charging power supply;

[0008] The control module is used to control the switch state of the first switch module to form a boost charging circuit between the charging power supply and the power battery by connecting at least one phase winding of the first three-phase motor and at least one phase winding of the second three-phase motor in series based on the conduction states of the first three-phase inverter and the second three-phase inverter.

[0009] Optionally, the first switch module includes a positive switch unit, a negative switch unit, and an intermediate switch unit that are respectively electrically connected to the control module;

[0010] The positive - pole switch unit is electrically connected to the first three - phase motor and the intermediate switch unit respectively and is used to be electrically connected to the positive pole of the charging power supply;

[0011] The negative - pole switch unit is electrically connected to the second three - phase motor and the intermediate switch unit respectively and is used to be electrically connected to the negative pole of the charging power supply;

[0012] The control module is used to control the switching states of the positive - pole switch unit and the negative - pole switch unit, so as to, based on the conduction states of the first three - phase inverter and the second three - phase inverter, connect at least one phase winding of the first three - phase motor in series between the positive pole of the charging power supply and the intermediate switch unit and connect at least one phase winding of the second three - phase motor in series between the negative pole of the charging power supply and the intermediate switch unit; and is used to control the switching state of the intermediate switch unit to connect at least one phase winding of the first three - phase motor and at least one phase winding of the second three - phase motor in series.

[0013] Optionally, the positive - pole switch unit includes a first switch, a second switch, a third switch, a fourth switch, a fifth switch and a sixth switch which are electrically connected to the control module respectively;

[0014] The first switch is connected in series between the Y - type connection end of the first - phase winding and the Y - type connection end of the second - phase winding of the first three - phase motor, and the Y - type connection end of the first - phase winding of the first three - phase motor is also used to be electrically connected to the positive pole of the charging power supply;

[0015] The second switch is connected in series between the Y - type connection end of the second - phase winding and the Y - type connection end of the third - phase winding of the first three - phase motor;

[0016] The third switch is connected in series between the output pole of the second - phase lower - arm power transistor of the first three - phase inverter and the Y - type connection end of the third - phase winding of the first three - phase motor;

[0017] The fourth switch is connected in series between the output pole of the third - phase lower - arm power transistor of the first three - phase inverter and the intermediate switch unit;

[0018] The fifth switch is connected in series between the output pole of the second - phase lower - arm power transistor of the first three - phase inverter and the Y - type connection end of the second - phase winding of the first three - phase motor;

[0019] The sixth switch is connected in series between the output pole of the third - phase lower - arm power transistor of the first three - phase inverter and the Y - type connection end of the second - phase winding of the first three - phase motor.

[0020] Optionally, the negative - pole switch unit includes a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch and a twelfth switch which are electrically connected to the control module respectively;

[0021] The seventh switch is connected in series between the Y-connection terminal of the first-phase winding and the Y-connection terminal of the second-phase winding of the second three-phase motor. The Y-connection terminal of the first-phase winding of the second three-phase motor is also electrically connected to the intermediate switch unit;

[0022] The eighth switch is connected in series between the Y-connection terminal of the second-phase winding and the Y-connection terminal of the third-phase winding of the second three-phase motor;

[0023] The ninth switch is connected in series between the output pole of the second-phase lower-arm power transistor of the second three-phase inverter and the Y-connection terminal of the third-phase winding of the second three-phase motor;

[0024] The tenth switch is connected in series between the output pole of the third-phase lower-arm power transistor of the second three-phase inverter and the negative pole of the charging power supply;

[0025] The eleventh switch is connected in series between the output pole of the second-phase lower-arm power transistor of the second three-phase inverter and the Y-connection terminal of the second-phase winding of the second three-phase motor;

[0026] The twelfth switch is connected in series between the output pole of the third-phase lower-arm power transistor of the second three-phase inverter and the Y-connection terminal of the second-phase winding of the second three-phase motor.

[0027] Optionally, the intermediate switch unit includes a thirteenth switch;

[0028] The thirteenth switch is connected in series between the positive-pole switch unit and the negative-pole switch unit.

[0029] Optionally, the power supply control device further includes a second switch module;

[0030] The second switch module is electrically connected to the control module and is used to be electrically connected to the power battery and the charging power supply respectively;

[0031] The control module is further used to control the switch states of the first switch module and the second switch module to short-circuit the first three-phase inverter, the first three-phase motor, the second three-phase inverter, and the second three-phase motor, thereby forming a direct charging loop between the charging power supply and the power battery.

[0032] Optionally, the second switch module includes a fourteenth switch and a fifteenth switch that are electrically connected to the control module respectively;

[0033] The first connection terminal of the fourteenth switch is used to be electrically connected to the positive pole of the power battery, and the second connection terminal of the fourteenth switch is used to be electrically connected to the positive pole of the charging power supply;

[0034] The first connection terminal of the fifteenth switch is used to be electrically connected to the negative pole of the power battery, and the second connection terminal of the fifteenth switch is used to be electrically connected to the negative pole of the charging power supply.

[0035] Optionally, the power supply control device further includes a third switch module;

[0036] The third switching module is electrically connected to the first three-phase inverter, the second three-phase inverter, and the control module respectively;

[0037] The control module is further configured to control the switching states of the first switching module and the third switching module, so as to form a discharge loop between the power battery and at least one of the first three-phase motor and the second three-phase motor based on the conduction states of the first three-phase inverter and the second three-phase inverter.

[0038] Optionally, the third switching module includes a sixteenth switch and a seventeenth switch that are respectively electrically connected to the control module;

[0039] The first access terminal of the sixteenth switch is electrically connected to the input pole of the upper bridge arm power tube of the first three-phase inverter and is used to be electrically connected to the positive pole of the power battery, and the second access terminal of the sixteenth switch is electrically connected to the input pole of the upper bridge arm power tube of the second three-phase inverter;

[0040] The first access terminal of the seventeenth switch is electrically connected to the output pole of the lower bridge arm power tube of the first three-phase inverter and is used to be electrically connected to the negative pole of the power battery, and the second access terminal of the seventeenth switch is electrically connected to the output pole of the lower bridge arm power tube of the second three-phase inverter.

[0041] According to a second aspect of the present application, a power system is provided, including a power battery and a power supply control device in any one of the above embodiments.

[0042] According to a third aspect of the present application, a power supply control method is provided, which is applied to the power system in any one of the above embodiments. The power supply control method includes the following steps executed by the control module:

[0043] After connecting to a charging power supply, obtain the output voltage of the charging power supply;

[0044] According to the required voltage and the output voltage of the power battery, control the switching state of the first switching module, so as to connect at least one phase winding of the first three-phase motor and at least one phase winding of the second three-phase motor in series based on the conduction states of the first three-phase inverter and the second three-phase inverter, and form a boost charging loop between the charging power supply and the power battery.

[0045] Optionally, according to the required voltage and the output voltage of the power battery, controlling the switching state of the first switching module, so as to connect at least one phase winding of the first three-phase motor and at least one phase winding of the second three-phase motor in series based on the conduction states of the first three-phase inverter and the second three-phase inverter, and forming a boost charging loop between the charging power supply and the power battery includes:

[0046] If the ratio of the required voltage to the output voltage is greater than 1 and within the first ratio range, control the switching state of the first switching module to connect in series two-phase windings of the first three-phase motor and two-phase windings of the second three-phase motor based on the conduction states of the first three-phase inverter and the second three-phase inverter, thereby forming a four-phase series boost charging circuit between the charging power source and the power battery.

[0047] Optionally, according to the required voltage and the output voltage of the power battery, control the switching state of the first switching module to connect in series at least one-phase winding of the first three-phase motor and at least one-phase winding of the second three-phase motor based on the conduction states of the first three-phase inverter and the second three-phase inverter, thereby forming a boost charging circuit between the charging power source and the power battery, including:

[0048] If the ratio of the required voltage to the output voltage is greater than 1 and within the second ratio range, control the switching state of the first switching module to connect in series three-phase windings of the first three-phase motor and two-phase windings of the second three-phase motor based on the conduction states of the first three-phase inverter and the second three-phase inverter, thereby forming a five-phase series boost charging circuit between the charging power source and the power battery.

[0049] Optionally, according to the required voltage and the output voltage of the power battery, control the switching state of the first switching module to connect in series at least one-phase winding of the first three-phase motor and at least one-phase winding of the second three-phase motor based on the conduction states of the first three-phase inverter and the second three-phase inverter, thereby forming a boost charging circuit between the charging power source and the power battery, including:

[0050] If the ratio of the required voltage to the output voltage is greater than 1 and within the third ratio range, control the switching state of the first switching module to connect in series three-phase windings of the first three-phase motor and three-phase windings of the second three-phase motor based on the conduction states of the first three-phase inverter and the second three-phase inverter, thereby forming a six-phase series boost charging circuit between the charging power source and the power battery.

[0051] Optionally, the power supply control device further includes a second switching module, which is electrically connected to the control module and the power battery respectively and is used to be electrically connected to the charging power source; after obtaining the output voltage of the charging power source, the power supply control method further includes:

[0052] If the ratio of the required voltage of the power battery to the output voltage is less than or equal to 1, control the switching states of the first switching module and the second switching module to short-circuit the first three-phase inverter, the first three-phase motor, the second three-phase inverter, and the second three-phase motor, thereby forming a direct charging circuit between the charging power source and the power battery.

[0053] According to a fourth aspect of the present application, a vehicle is provided, which includes the power supply control device in any of the above embodiments, or includes the power system in any of the above embodiments.

[0054] In the power supply control device of the present application, the dual motors and the corresponding dual inverters of the vehicle are multiplexed through a control module and a first switch module, so as to achieve the purpose of boosting voltage when charging the power battery, improving the integration of the vehicle, and reducing the cost and volume of the vehicle; in addition, since the present application multiplexes the dual motors and the dual inverters, more combinations of inductance values can be achieved, and then more boost charging schemes can be realized, ultimately improving the adaptability and compatibility between the power battery and the charging power supply.

[0055] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application, and those skilled in the art can obtain other drawings without creative efforts based on these drawings.

[0057] In order to more fully understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, where the same reference numerals represent the same parts in the following description.

[0058] Figure 1 It is a schematic structural diagram of a power system including a power supply control device provided in an exemplary embodiment of the present application;

[0059] Figure 2 It is a schematic structural diagram of an exemplary embodiment of the present application with a second switch module added;

[0060] Figure 3 It is a schematic structural diagram of an exemplary embodiment of the present application with a third switch module added;

[0061] Figure 4 It is a specific circuit schematic diagram of a power system provided in an exemplary embodiment of the present application;

[0062] Figure 5 It is a schematic diagram of the current path in the direct charging mode provided in an exemplary embodiment of the present application;

[0063] Figure 6 It is a schematic diagram of the current path in the energy storage stage of the four-phase boost mode provided in an exemplary embodiment of the present application;

[0064] Figure 7It is a schematic diagram of the current path in the energy release stage of the four-phase boost mode provided in the exemplary embodiment of the present application;

[0065] Figure 8 It is a schematic diagram of the current path in the energy storage stage of the five-phase boost mode provided in the exemplary embodiment of the present application;

[0066] Figure 9 It is a schematic diagram of the current path in the energy release stage of the five-phase boost mode provided in the exemplary embodiment of the present application;

[0067] Figure 10 It is a schematic diagram of the current path in the energy storage stage of the six-phase boost mode provided in the exemplary embodiment of the present application;

[0068] Figure 11 It is a schematic diagram of the current path in the energy release stage of the six-phase boost mode provided in the exemplary embodiment of the present application;

[0069] Figure 12 It is a schematic flowchart of the power supply control method provided in the exemplary embodiment of the present application. Specific embodiments

[0070] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0071] According to the first aspect of the present application, as Figure 1 shown, a power supply control device is provided, including a first three-phase inverter 1011, a first three-phase motor 1021, a second three-phase inverter 1012, a second three-phase motor 1022, a first switch module 103, and a control module 104.

[0072] The first three-phase motor 1021 is used to be electrically connected to the power battery 106 through the first three-phase inverter 1011, and the second three-phase motor 1022 is used to be electrically connected to the power battery 106 through the second three-phase inverter 1012.

[0073] Among them, in the dual-motor drive scenario, the first three-phase inverter 1011 can be used to invert the DC power output by the power battery 106 under the control of the electronic control module 105 to drive the first three-phase motor 1021. Similarly, the second three-phase inverter 1012 can be used to invert the DC power output by the power battery 106 under the control of the electronic control module 105 to drive the second three-phase motor 1022. The specific process of the electronic control module 105 controlling the conduction states of the first three-phase inverter 1011 and the second three-phase inverter 1012 to enable the power battery 106 to drive the first three-phase motor 1021 and the second three-phase motor 1022 can refer to the relevant existing technologies and will not be elaborated here.

[0074] The first switch module 103 is electrically connected to the first three-phase motor 1021, the second three-phase motor 1022, and the control module 104 respectively and is used to be electrically connected to the charging power supply 107.

[0075] The control module 104 is used to control the switching state of the first switch module 103 to connect at least one phase winding of the first three-phase motor 1021 and at least one phase winding of the second three-phase motor 1022 in series based on the conduction states of the first three-phase inverter 1011 and the second three-phase inverter 1012, so as to form a boost charging circuit between the charging power supply 107 and the power battery 106.

[0076] Among them, the conduction states of the first three-phase inverter 1011 and the second three-phase inverter 1012 are controlled by the electronic control module 105, and the control module 104 and the electronic control module 105 can perform signal interaction to realize the construction of the boost charging circuit.

[0077] Among them, the first three-phase motor 1021 and the second three-phase motor 1022 each include three-phase windings. If the inductance of each phase winding of the first three-phase motor 1021 and the second three-phase motor 1022 is the same, then by connecting at least one phase winding of the first three-phase motor 1021 and at least one phase winding of the second three-phase motor 1022 in series, five inductance combinations of two-phase, three-phase, four-phase, five-phase, and six-phase can be obtained, thereby realizing five boost charging schemes. In addition, if the inductance of each phase winding of the first three-phase motor 1021 and the second three-phase motor 1022 is different, more boost charging schemes can be realized.

[0078] The power supply control device in this application uses the control module and the first switch module to reuse the dual motors and the corresponding dual inverters of the vehicle, thereby achieving the purpose of boosting when charging the power battery, improving the integration of the vehicle, and reducing the cost and volume of the vehicle; in addition, since this application reuses the dual motors and the dual inverters, more inductance combinations can be realized, and then more boost charging schemes can be realized, ultimately improving the adaptability and compatibility between the power battery and the charging power supply.

[0079] As shown Figure 2 in the figure, optionally, the power supply control device further includes a second switch module 108.

[0080] The second switch module 108 is electrically connected to the control module 104 and is used to be electrically connected to the power battery 106 and the charging power supply 107 respectively.

[0081] The control module 104 is further used to control the switch states of the first switch module 103 and the second switch module 108 to short-circuit the first three-phase inverter 1011, the first three-phase motor 1021, the second three-phase inverter 1012 and the second three-phase motor 1022, so as to form a direct charging circuit between the charging power supply 107 and the power battery 106.

[0082] Among them, through the switch combination of the first switch module 103 and the second switch module 108, the power battery 106 and the charging power supply 107 can be directly connected, so that the charging current does not pass through the first three-phase inverter 1011, the first three-phase motor 1021, the second three-phase inverter 1012 and the second three-phase motor 1022, and further a direct charging solution for the charging power supply 107 to the power battery 106 is realized.

[0083] As shown Figure 3 in the figure, optionally, the power supply control device further includes a third switch module 109.

[0084] The third switch module 109 is electrically connected to the first three-phase inverter 1011, the second three-phase inverter 1012 and the control module 104 respectively.

[0085] The control module 104 is further used to control the switch states of the first switch module 103 and the third switch module 109 to form a discharge circuit between the power battery 106 and at least one of the first three-phase motor 1021 and the second three-phase motor 1022 based on the conduction states of the first three-phase inverter 1011 and the second three-phase inverter 1012.

[0086] Among them, the conduction states of the first three-phase inverter 1011 and the second three-phase inverter 1012 are controlled by the electronic control module 105.

[0087] Among them, the first switch module 103 is mainly used to disconnect the charging circuit and keep the lines that need to be conducted between the first three-phase inverter 1011 and the first three-phase motor 1021 and between the second three-phase inverter 1012 and the second three-phase motor 1022 in the discharge circuit. It should be noted that when the second switch module 108 is provided, it is also necessary to keep the second switch module 108 disconnecting the line between the power battery 106 and the charging power supply 107.

[0088] Among them, the third switch module 109 is mainly used to implement the selection of single electric drive and dual electric drive. For example, in Figure 3 when the control module 104 controls the third switch module 109 to conduct, the power battery 106 is respectively kept conducting with the first three-phase inverter 1011 and the second three-phase inverter 1012. At this time, the first three-phase inverter 1011 and the second three-phase inverter 1012 can respectively access the DC power supply output by the power battery 106 to drive the first three-phase motor 1021 and the second three-phase motor 1022 respectively; similarly, when the control module 104 controls the third switch module 109 to disconnect, the power battery 106 is only kept conducting with the first three-phase inverter 1011. At this time, only the first three-phase inverter 1011 can access the DC power supply output by the power battery 106 to drive the first three-phase motor 1021.

[0089] Optionally, the first switch module includes a positive pole switch unit, a negative pole switch unit and an intermediate switch unit respectively electrically connected to the control module.

[0090] The positive pole switch unit is respectively electrically connected to the first three-phase motor and the intermediate switch unit and is used to be electrically connected to the positive pole of the charging power supply.

[0091] The negative pole switch unit is respectively electrically connected to the second three-phase motor and the intermediate switch unit and is used to be electrically connected to the negative pole of the charging power supply.

[0092] The control module is used to control the switch states of the positive pole switch unit and the negative pole switch unit, so as to connect at least one phase winding in the first three-phase motor in series between the positive pole of the charging power supply and the intermediate switch unit and connect at least one phase winding in the second three-phase motor in series between the negative pole of the charging power supply and the intermediate switch unit based on the conduction states of the first three-phase inverter and the second three-phase inverter; and is used to control the switch state of the intermediate switch unit to connect at least one phase winding in the first three-phase motor and at least one phase winding in the second three-phase motor in series.

[0093] Among them, in this embodiment, the first switch module respectively includes the switch control of the load positive pole, negative pole and the intermediate part between the positive and negative poles, so as to better realize the construction of the charging circuit of the whole power supply control device.

[0094] As Figure 4 shown, optionally, the positive pole switch unit includes a first switch K1, a second switch K2, a third switch K3, a fourth switch K4, a fifth switch K5 and a sixth switch K6 respectively electrically connected to the control module, the negative pole switch unit includes a seventh switch K7, an eighth switch K8, a ninth switch K9, a tenth switch K10, an eleventh switch K11 and a twelfth switch K12 respectively electrically connected to the control module, and the intermediate switch unit includes a thirteenth switch K13.

[0095] The first switch K1 is connected in series between the Y - type connection end of the first - phase winding L11 and the Y - type connection end of the second - phase winding L12 of the first three - phase motor. The Y - type connection end of the first - phase winding L11 of the first three - phase motor is also used for electrically connecting to the positive pole of the charging power supply.

[0096] The second switch K2 is connected in series between the Y - type connection end of the second - phase winding L12 and the Y - type connection end of the third - phase winding L13 of the first three - phase motor.

[0097] The third switch K3 is connected in series between the output pole of the second - phase lower - bridge - arm power transistor Q5 of the first three - phase inverter and the Y - type connection end of the third - phase winding L13 of the first three - phase motor.

[0098] The fourth switch K4 is connected in series between the output pole of the third - phase lower - bridge - arm power transistor Q6 of the first three - phase inverter and the first connection end of the thirteenth switch K13.

[0099] The fifth switch K5 is connected in series between the output pole of the second - phase lower - bridge - arm power transistor Q5 of the first three - phase inverter and the Y - type connection end of the second - phase winding L12 of the first three - phase motor.

[0100] The sixth switch K6 is connected in series between the output pole of the third - phase lower - bridge - arm power transistor Q6 of the first three - phase inverter and the Y - type connection end of the second - phase winding L12 of the first three - phase motor.

[0101] The seventh switch K7 is connected in series between the Y - type connection end of the first - phase winding L21 and the Y - type connection end of the second - phase winding L22 of the second three - phase motor. The Y - type connection end of the first - phase winding L21 of the second three - phase motor is also electrically connected to the second connection end of the thirteenth switch K13.

[0102] The eighth switch K8 is connected in series between the Y - type connection end of the second - phase winding L22 and the Y - type connection end of the third - phase winding L23 of the second three - phase motor.

[0103] The ninth switch K9 is connected in series between the output pole of the second - phase lower - bridge - arm power transistor Q11 of the second three - phase inverter and the Y - type connection end of the third - phase winding L23 of the second three - phase motor.

[0104] The tenth switch K10 is connected in series between the output pole of the third - phase lower - bridge - arm power transistor Q12 of the second three - phase inverter and the negative pole of the charging power supply.

[0105] The eleventh switch K11 is connected in series between the output pole of the second - phase lower - bridge - arm power transistor Q11 of the second three - phase inverter and the Y - type connection end of the second - phase winding L22 of the second three - phase motor.

[0106] The twelfth switch K12 is connected in series between the output pole of the third - phase lower - bridge - arm power transistor Q12 of the second three - phase inverter and the Y - type connection end of the second - phase winding L22 of the second three - phase motor.

[0107] Among them, in Figure 4 , the combination of the first switch K1, the second switch K2, the third switch K3, the fourth switch K4, the fifth switch K5, and the sixth switch K6 can achieve the series connection of the first-phase winding L11 and the third-phase winding L13 of the first three-phase motor or the series connection of the first-phase winding L11, the second-phase winding L12, and the third-phase winding L13 of the first three-phase motor; similarly, in Figure 4 , the combination of the seventh switch K7, the eighth switch K8, the ninth switch K9, the tenth switch K10, the eleventh switch K11, and the twelfth switch K12 can achieve the series connection of the first-phase winding L21 and the third-phase winding L23 of the second three-phase motor or the series connection of the first-phase winding L21, the second-phase winding L22, and the third-phase winding L23 of the second three-phase motor; thus, when the thirteenth switch K3 is turned on, three boost charging schemes corresponding to four-phase, five-phase, and six-phase for 2+2, 3+2, 2+3, and 3+3 can be achieved respectively.

[0108] As Figure 4 shown, optionally, the second switch module includes a fourteenth switch K14 and a fifteenth switch K15 that are respectively electrically connected to the control module.

[0109] The first connection end of the fourteenth switch K14 is used to be electrically connected to the positive electrode of the power battery, and the second connection end of the fourteenth switch K14 is used to be electrically connected to the positive electrode of the charging power supply.

[0110] The first connection end of the fifteenth switch K15 is used to be electrically connected to the negative electrode of the power battery, and the second connection end of the fifteenth switch K15 is used to be electrically connected to the negative electrode of the charging power supply.

[0111] Among them, it should be noted that in Figure 4 , only by controlling the fourteenth switch K14 and the fifteenth switch K15 to be turned on, the direct charging between the power battery and the charging power supply cannot be immediately achieved, and it is also necessary to further control the fourth switch K4 and the sixth switch K6 in the first switch module to be turned on.

[0112] As Figure 4 shown, optionally, the third switch module includes a sixteenth switch K16 and a seventeenth switch K17 that are respectively electrically connected to the control module.

[0113] The first connection end of the sixteenth switch K16 is electrically connected to the input poles of the first-phase upper-bridge power transistor Q1, the second-phase upper-bridge power transistor Q2, and the third-phase upper-bridge power transistor Q3 of the first three-phase inverter respectively, and is used to be electrically connected to the positive electrode of the power battery. The second connection end of the sixteenth switch K16 is electrically connected to the input poles of the first-phase upper-bridge power transistor Q7, the second-phase upper-bridge power transistor Q8, and the third-phase upper-bridge power transistor Q9 of the second three-phase inverter respectively.

[0114] The first connection end of the seventeenth switch K17 is electrically connected to the output poles of the first-phase lower-bridge power transistor Q4, the second-phase lower-bridge power transistor Q5, and the third-phase lower-bridge power transistor Q6 of the first three-phase inverter respectively, and is used to be electrically connected to the negative electrode of the power battery. The second connection end of the seventeenth switch K17 is electrically connected to the output poles of the first-phase lower-bridge power transistor Q10, the second-phase lower-bridge power transistor Q11, and the third-phase lower-bridge power transistor Q12 of the second three-phase inverter respectively.

[0115] Wherein, when the sixteenth switch K16 and the seventeenth switch K17 are disconnected, the power battery is only connected to the input pole and the output pole of the first three-phase inverter to realize single electric drive; when the sixteenth switch K16 and the seventeenth switch K17 are turned on, the power battery is connected to the input pole and the output pole of the first three-phase inverter and the input pole and the output pole of the second three-phase inverter respectively to realize double electric drive.

[0116] According to the second aspect of the present application, a power system is provided, including a power battery and the power supply control device in any one of the above embodiments.

[0117] The power supply control device included in the power system of the present application multiplexes the dual motors and the corresponding dual inverters of the vehicle through the control module and the first switch module, thereby achieving the purpose of boosting voltage when charging the power battery, improving the integration of the vehicle, and reducing the cost and volume of the vehicle; in addition, since the present application multiplexes the dual motors and the dual inverters, more combinations of inductance values can be realized, and then more boosting charging schemes can be realized, ultimately improving the adaptability and compatibility between the power battery and the charging power supply.

[0118] According to the third aspect of the present application, a power supply control method is provided, which is applied to the power system in any one of the above embodiments. Referring to Figures 1 to 3 any one of the drawings, the power supply control method includes the following steps executed by the control module 104:

[0119] After connecting to the charging power supply 107, obtain the output voltage of the charging power supply 107;

[0120] According to the required voltage and output voltage of the power battery 106, control the switching state of the first switching module 103, and based on the conduction states of the first three-phase inverter 1011 and the second three-phase inverter 1012, connect at least one winding of the first three-phase motor 1021 and at least one winding of the second three-phase motor 1022 in series to form a boost charging circuit between the charging power supply 107 and the power battery 106.

[0121] Among them, when the required voltage is greater than the output voltage, it indicates that the output voltage of the charging power supply 107 needs to be boosted, and then the boosted voltage is used to charge the power battery 106. Different combinations of inductance values correspond to different boosting degrees. Therefore, the different switching states of the first switching module 103 can be further controlled according to the difference degree between the required voltage and the output voltage to construct boost charging circuits with different boosting degrees.

[0122] Optionally, according to the required voltage and output voltage of the power battery 106, control the switching state of the first switching module 103, and based on the conduction states of the first three-phase inverter 1011 and the second three-phase inverter 1012, connect at least one winding of the first three-phase motor 1021 and at least one winding of the second three-phase motor 1022 in series to form a boost charging circuit between the charging power supply 107 and the power battery 106, including:

[0123] If the ratio of the required voltage to the output voltage is greater than 1 and within the first ratio range, control the switching state of the first switching module 103, and based on the conduction states of the first three-phase inverter 1011 and the second three-phase inverter 1012, connect two windings of the first three-phase motor 1021 and two windings of the second three-phase motor 1022 in series to form a four-phase series boost charging circuit between the charging power supply 107 and the power battery 106.

[0124] Among them, the difference degree between the required voltage and the output voltage can be determined by the ratio. When the required voltage is greater than the output voltage, the corresponding ratio is greater than 1. Further, multiple ratio ranges can be preset, such as including a first ratio range, a second ratio range, and a third ratio range that increase in sequence. If the corresponding ratio is within the first ratio range, it indicates that the corresponding boosting degree is relatively small. Therefore, two windings of the first three-phase motor 1021 and two windings of the second three-phase motor 1022 are connected in series to form a four-phase series boost charging circuit between the charging power supply 107 and the power battery 106.

[0125] Among them, the first ratio range can be 1.6 - 1.8.

[0126] Optionally, according to the required voltage and output voltage of the power battery 106, control the switching state of the first switch module 103, and based on the conduction states of the first three-phase inverter 1011 and the second three-phase inverter 1012, connect at least one phase winding of the first three-phase motor 1021 and at least one phase winding of the second three-phase motor 1022 in series to form a boost charging circuit between the charging power supply 107 and the power battery 106, including:

[0127] If the ratio of the required voltage to the output voltage is greater than 1 and within the second ratio range, control the switching state of the first switch module 103, and based on the conduction states of the first three-phase inverter 1011 and the second three-phase inverter 1012, connect the three-phase windings of the first three-phase motor 1021 and the two-phase windings of the second three-phase motor 1022 in series to form a five-phase series boost charging circuit between the charging power supply 107 and the power battery 106.

[0128] Among them, if the corresponding ratio is within the second ratio range, it indicates that the corresponding boost degree is relatively moderate. Therefore, connect the three-phase windings of the first three-phase motor 1021 and the two-phase windings of the second three-phase motor 1022 in series to form a five-phase series boost charging circuit between the charging power supply 107 and the power battery 106.

[0129] Among them, the second ratio range can be 1.8 - 2.

[0130] Optionally, according to the required voltage and output voltage of the power battery 106, control the switching state of the first switch module 103, and based on the conduction states of the first three-phase inverter 1011 and the second three-phase inverter 1012, connect at least one phase winding of the first three-phase motor 1021 and at least one phase winding of the second three-phase motor 1022 in series to form a boost charging circuit between the charging power supply 107 and the power battery 106, including:

[0131] If the ratio of the required voltage to the output voltage is greater than 1 and within the third ratio range, control the switching state of the first switch module 103, and based on the conduction states of the first three-phase inverter 1011 and the second three-phase inverter 1012, connect the three-phase windings of the first three-phase motor 1021 and the three-phase windings of the second three-phase motor 1022 in series to form a six-phase series boost charging circuit between the charging power supply 107 and the power battery 106.

[0132] Among them, if the corresponding ratio is within the third ratio range, it indicates that the corresponding boost degree is relatively high. Therefore, connect the three-phase windings of the first three-phase motor 1021 and the three-phase windings of the second three-phase motor 1022 in series to form a six-phase series boost charging circuit between the charging power supply 107 and the power battery 106.

[0133] Among them, the first ratio range can be 2 -.

[0134] Optionally, referring to Figure 2 or Figure 3 , the power supply control device further includes a second switch module 108. The second switch module 108 is electrically connected to the control module 104 and the power battery 106 respectively and is used to be electrically connected to the charging power supply 107. After obtaining the output voltage of the charging power supply 107, the power supply control method further includes:

[0135] If the ratio of the required voltage of the power battery 106 to the output voltage is less than or equal to 1, control the switch states of the first switch module 103 and the second switch module 108 to short-circuit the first three-phase inverter 1011, the first three-phase motor 1021, the second three-phase inverter 1012 and the second three-phase motor 1022, so as to form a direct charging circuit between the charging power supply 107 and the power battery 106.

[0136] Among them, if the corresponding ratio is less than or equal to 1, it means that the required voltage is less than or equal to the output voltage, and there is no need for boost charging. Therefore, the first three-phase inverter 1011, the first three-phase motor 1021, the second three-phase inverter 1012 and the second three-phase motor 1022 are short-circuited to form a direct charging circuit between the charging power supply 107 and the power battery 106.

[0137] To make the above method clearer, the above embodiments are now described in combination. As Figure 12 shown, a power supply control method is provided, including:

[0138] Step S101: The charging pile is connected to the vehicle to access the charging power supply provided by the charging pile.

[0139] Step S102: The control module obtains the output voltage of the charging power supply.

[0140] Step S103: The control module determines whether the required voltage of the power battery is greater than the output voltage of the charging power supply. If the condition is not met, jump to step S104; if the condition is met, jump to step S107.

[0141] Step S104: The control module sends a control signal to control the switch module to close K4, K6, K14, K15, and enter the direct charging mode. The current path at this time refers to Figure 5 .

[0142] Step S105: Charge the power battery.

[0143] Step S106: The control module determines whether the power battery is fully charged. If it is fully charged, jump to step S122; if it is not fully charged, jump to step S105.

[0144] Step S107: The control module determines whether the ratio of the required voltage of the power battery to the output voltage of the charging power supply is greater than 1.6 and less than 1.8. If the condition is met, it jumps to step S108; if the condition is not met, it jumps to step S112.

[0145] Step S108: The control module sends a control signal to control the switch module to close K2, K4, K13, K8, K10, forming a Boost boost DC / DC circuit with the three-phase inverter and the four-phase windings of the three-phase motor, entering the four-phase boost mode. The current path at this time refers to Figure 6 and Figure 7 .

[0146] Step S109: The electronic control module sends a control signal to control the three-phase inverter to conduct Q4, Q6, Q10, Q12, so that the three-phase motor coil stores energy.

[0147] Step S110: The electronic control module sends a control signal to control the three-phase inverter to disconnect Q4, Q10 and conduct Q6, Q12, so that the three-phase motor coil releases energy and raises the charging voltage.

[0148] Step S111: The control module determines whether the power battery is fully charged. If it is not fully charged, it jumps to step S109, and alternately controls the conduction or cutoff of Q4, Q6, Q10, Q12 of the three-phase inverter in a loop; if it is fully charged, it jumps to step S122.

[0149] Step S112: The control module determines whether the ratio of the required voltage of the power battery to the output voltage of the charging power supply is greater than 1.8 and less than 2.0. If the condition is met, it jumps to step S113; if the condition is not met, it jumps to step S117.

[0150] Step S113: The control module sends a control signal to control the switch module to close K3, K4, K13, K9, K10, forming a Boost boost DC / DC circuit with the three-phase inverter and the five-phase windings of the three-phase motor, entering the five-phase series boost mode. The current path at this time refers to Figure 8 and Figure 9 .

[0151] Step S114: The electronic control module sends a control signal to control the three-phase inverter to conduct Q4, Q5, Q6, Q10, Q12, so that the three-phase motor coil stores energy.

[0152] Step S115: The control module sends a control signal to control the three-phase inverter to disconnect Q4, Q10, and conduct Q6, Q5, Q12, so that the three-phase motor coil releases energy and raises the charging voltage.

[0153] Step S116: The control module determines whether the power battery is fully charged. If it is not fully charged, it jumps to step S114, and alternately controls the conduction or cutoff of Q4, Q5, Q6, Q10, and Q12 of the three-phase inverter in a cycle; if it is fully charged, it jumps to step S122.

[0154] Step S117: The control module determines whether the ratio of the required voltage of the power battery to the output voltage of the charging power supply is greater than 2. If the condition is met, it jumps to step S118; if the condition is not met, it jumps to step S103 to re-judge.

[0155] Step S118: The control module sends a control signal to control the closing of K3, K4, K13, K9, and K10 of the switch module, and forms a Boost boost DC / DC circuit with the three-phase inverter and the six-phase windings of the three-phase motor, and enters the six-phase series boost mode. The current path at this time refers to Figure 10 and Figure 11 .

[0156] Step S119: The electronic control module sends a control signal to control the conduction of Q4, Q5, Q6, Q10, Q11, and Q12 of the three-phase inverter to store energy in the three-phase AC motor coil.

[0157] Step S120: The electronic control module sends a control signal to control the disconnection of Q4 and Q10 and the conduction of Q5, Q6, Q11, and Q12 of the three-phase inverter to release the energy of the three-phase motor coil and raise the charging voltage.

[0158] Step S121: The control module determines whether the power battery is fully charged. If it is not fully charged, it jumps to step S119, and alternately controls the conduction or cutoff of Q4, Q5, Q6, Q10, Q11, and Q12 of the three-phase inverter in a cycle; if it is fully charged, it jumps to step S122.

[0159] Step S122: After the power battery is fully charged, the charging is completed.

[0160] It should be noted that step S103, step S107, step S112, and step S117 can be combined into one step executed simultaneously, that is, after obtaining the output voltage, directly determine the ratio range corresponding to the ratio of the required voltage and the output voltage, so as to directly jump to step S104, step S108, step S113, or step S118.

[0161] According to the fourth aspect of the present application, a vehicle is provided, including the power supply control device in any of the above embodiments, or including the power system in any of the above embodiments.

[0162] The power supply control device included in the vehicle in this application multiplexes the dual motors and the corresponding dual inverters of the vehicle through a control module and a first switch module, so as to achieve the purpose of boosting voltage when charging the power battery, improve the integration of the vehicle, and reduce the cost and volume of the vehicle. In addition, since this application multiplexes the dual motors and the dual inverters, more combinations of inductance values can be achieved, and thus more boost charging schemes can be realized, ultimately improving the adaptability and compatibility between the power battery and the charging power supply.

[0163] In the description of this application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0164] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0165] The embodiments, implementation manners and related technical features of this application can be combined and replaced with each other without conflict.

[0166] The above are only the preferred embodiments of this application and do not impose any form of limitation on this application. In the embodiments of this application, the descriptions of the respective embodiments have their own emphases. For parts not detailed in a certain embodiment, reference may be made to the relevant content of other embodiments. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application still fall within the scope of the technical solution of this application.

Claims

1. A power supply control device, characterized in that, It includes a first three-phase inverter, a first three-phase motor, a second three-phase inverter, a second three-phase motor, a first switch module and a control module; The first three-phase motor is used to be electrically connected to the power battery through the first three-phase inverter, the second three-phase motor is used to be electrically connected to the power battery through the second three-phase inverter, and the first switch module is electrically connected to the first three-phase motor, the second three-phase motor and the control module respectively and is used to be electrically connected to a charging power supply; The control module is used to control the switching state of the first switch module, so as to connect at least one phase winding of the first three-phase motor and at least one phase winding of the second three-phase motor in series based on the conduction states of the first three-phase inverter and the second three-phase inverter, and form a boost charging circuit between the charging power supply and the power battery.

2. The power supply control device according to claim 1, wherein The first switch module includes a positive electrode switch unit, a negative electrode switch unit and an intermediate switch unit that are electrically connected to the control module respectively; The positive electrode switch unit is electrically connected to the first three-phase motor and the intermediate switch unit respectively and is used to be electrically connected to the positive electrode of the charging power supply; The negative electrode switch unit is electrically connected to the second three-phase motor and the intermediate switch unit respectively and is used to be electrically connected to the negative electrode of the charging power supply; The control module is used to control the switching states of the positive electrode switch unit and the negative electrode switch unit, so as to connect at least one phase winding of the first three-phase motor in series between the positive electrode of the charging power supply and the intermediate switch unit and connect at least one phase winding of the second three-phase motor in series between the negative electrode of the charging power supply and the intermediate switch unit based on the conduction states of the first three-phase inverter and the second three-phase inverter; and is used to control the switching state of the intermediate switch unit to connect at least one phase winding of the first three-phase motor and at least one phase winding of the second three-phase motor in series.

3. The power supply control device according to claim 2, characterized in that, The positive electrode switch unit includes a first switch, a second switch, a third switch, a fourth switch, a fifth switch and a sixth switch that are electrically connected to the control module respectively; The first switch is connected in series between the Y-connected end of the first-phase winding and the Y-connected end of the second-phase winding of the first three-phase motor, and the Y-connected end of the first-phase winding of the first three-phase motor is also used to be electrically connected to the positive electrode of the charging power supply; The second switch is connected in series between the Y-connected end of the second-phase winding and the Y-connected end of the third-phase winding of the first three-phase motor; The third switch is connected in series between the output pole of the second-phase lower-bridge arm power tube of the first three-phase inverter and the Y-connected end of the third-phase winding of the first three-phase motor; The fourth switch is connected in series between the output pole of the third-phase lower-bridge arm power tube of the first three-phase inverter and the intermediate switch unit; The fifth switch is connected in series between the output pole of the second-phase lower-bridge arm power tube of the first three-phase inverter and the Y-connected end of the second-phase winding of the first three-phase motor; The sixth switch is connected in series between the output pole of the third-phase lower-bridge power transistor of the first three-phase inverter and the Y-connected end of the second-phase winding of the first three-phase motor.

4. The power supply control device according to claim 2, wherein The negative switch unit includes a seventh switch, an eighth switch, a ninth switch, a tenth switch, an eleventh switch, and a twelfth switch, which are respectively electrically connected to the control module; The seventh switch is connected in series between the Y-connected end of the first-phase winding and the Y-connected end of the second-phase winding of the second three-phase motor, and the Y-connected end of the first-phase winding of the second three-phase motor is also electrically connected to the intermediate switch unit; The eighth switch is connected in series between the Y-connected end of the second-phase winding and the Y-connected end of the third-phase winding of the second three-phase motor; The ninth switch is connected in series between the output pole of the second-phase lower-bridge power transistor of the second three-phase inverter and the Y-connected end of the third-phase winding of the second three-phase motor; The tenth switch is connected in series between the output pole of the third-phase lower-bridge power transistor of the second three-phase inverter and the negative pole of the charging power supply; The eleventh switch is connected in series between the output pole of the second-phase lower-bridge power transistor of the second three-phase inverter and the Y-connected end of the second-phase winding of the second three-phase motor; The twelfth switch is connected in series between the output pole of the third-phase lower-bridge power transistor of the second three-phase inverter and the Y-connected end of the second-phase winding of the second three-phase motor.

5. The power supply control device according to claim 2, wherein The intermediate switch unit includes a thirteenth switch; The thirteenth switch is connected in series between the positive switch unit and the negative switch unit.

6. The power supply control device according to claim 1, characterized in that The power supply control device further includes a second switch module; The second switch module is electrically connected to the control module and is used to be respectively electrically connected to the power battery and the charging power supply; The control module is further used to control the switching states of the first switch module and the second switch module to short-circuit the first three-phase inverter, the first three-phase motor, the second three-phase inverter, and the second three-phase motor, so as to form a direct charging circuit between the charging power supply and the power battery.

7. The power supply control device according to claim 6, wherein The second switch module includes a fourteenth switch and a fifteenth switch, which are respectively electrically connected to the control module; The first connection end of the fourteenth switch is used to be electrically connected to the positive pole of the power battery, and the second connection end of the fourteenth switch is used to be electrically connected to the positive pole of the charging power supply; The first connection end of the fifteenth switch is used to be electrically connected to the negative pole of the power battery, and the second connection end of the fifteenth switch is used to be electrically connected to the negative pole of the charging power supply.

8. The power supply control device according to claim 1, characterized in that, The power supply control device further includes a third switch module; The third switch module is respectively electrically connected to the first three-phase inverter, the second three-phase inverter, and the control module; The control module is further used to control the switching states of the first switch module and the third switch module to form a discharge circuit between the power battery and at least one of the first three-phase motor and the second three-phase motor based on the conduction states of the first three-phase inverter and the second three-phase inverter.

9. The power supply control device according to claim 8, wherein The third switch module includes a sixteenth switch and a seventeenth switch, which are respectively electrically connected to the control module; The first connection terminal of the sixteenth switch is electrically connected to the input pole of the upper-bridge-arm power transistor of the first three-phase inverter and is used to be electrically connected to the positive pole of the power battery, and the second connection terminal of the sixteenth switch is electrically connected to the input pole of the upper-bridge-arm power transistor of the second three-phase inverter; The first connection terminal of the seventeenth switch is electrically connected to the output pole of the lower-bridge-arm power transistor of the first three-phase inverter and is used to be electrically connected to the negative pole of the power battery, and the second connection terminal of the seventeenth switch is electrically connected to the output pole of the lower-bridge-arm power transistor of the second three-phase inverter.

10. A power system, characterized in that, It includes a power battery and the power supply control device according to any one of claims 1 to 9.

11. A power supply control method, characterized in that Applied to the power system according to claim 10, the power supply control method includes the following steps executed by the control module: After connecting to the charging power supply, obtain the output voltage of the charging power supply; According to the required voltage of the power battery and the output voltage, control the switching state of the first switch module, so as to based on the conduction states of the first three-phase inverter and the second three-phase inverter, connect at least one phase winding of the first three-phase motor and at least one phase winding of the second three-phase motor in series to form a boost charging circuit between the charging power supply and the power battery.

12. The power supply control method according to claim 11, wherein, The step of according to the required voltage of the power battery and the output voltage, controlling the switching state of the first switch module, so as to based on the conduction states of the first three-phase inverter and the second three-phase inverter, connect at least one phase winding of the first three-phase motor and at least one phase winding of the second three-phase motor in series to form a boost charging circuit between the charging power supply and the power battery includes: If the ratio of the required voltage to the output voltage is greater than 1 and is within the first ratio range, control the switching state of the first switch module, so as to based on the conduction states of the first three-phase inverter and the second three-phase inverter, connect two-phase windings of the first three-phase motor and two-phase windings of the second three-phase motor in series to form a four-phase series boost charging circuit between the charging power supply and the power battery.

13. The power supply control method according to claim 11, characterized in that, The step of according to the required voltage of the power battery and the output voltage, controlling the switching state of the first switch module, so as to based on the conduction states of the first three-phase inverter and the second three-phase inverter, connect at least one phase winding of the first three-phase motor and at least one phase winding of the second three-phase motor in series to form a boost charging circuit between the charging power supply and the power battery includes: If the ratio of the required voltage to the output voltage is greater than 1 and is within the second ratio range, control the switching state of the first switch module, so as to based on the conduction states of the first three-phase inverter and the second three-phase inverter, connect three-phase windings of the first three-phase motor and two-phase windings of the second three-phase motor in series to form a five-phase series boost charging circuit between the charging power supply and the power battery.

14. The power supply control method according to claim 11, wherein Controlling the switching state of the first switching module according to the required voltage of the power battery and the output voltage, so as to form a boost charging circuit between the charging power supply and the power battery based on the conduction states of the first three-phase inverter and the second three-phase inverter, including: If the ratio of the required voltage to the output voltage is greater than 1 and within a third ratio range, control the switching state of the first switching module to connect the three-phase windings of the first three-phase motor and the three-phase windings of the second three-phase motor in series based on the conduction states of the first three-phase inverter and the second three-phase inverter, thereby forming a six-phase series boost charging circuit between the charging power supply and the power battery.

15. The power supply control method according to claim 11, wherein The power supply control device further includes a second switching module, which is electrically connected to the control module and the power battery respectively and is used to be electrically connected to the charging power supply; After obtaining the output voltage of the charging power supply, the power supply control method further includes: If the ratio of the required voltage of the power battery to the output voltage is less than or equal to 1, control the switching states of the first switching module and the second switching module to short-circuit the first three-phase inverter, the first three-phase motor, the second three-phase inverter, and the second three-phase motor, thereby forming a direct charging circuit between the charging power supply and the power battery.

16. A vehicle, characterized in that, Comprising the power supply control device according to any one of claims 1 to 9, or comprising the power system according to claim 10.

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