Vehicle charging control method and device, vehicle and storage medium

Abstract

The invention relates to a vehicle charging control method and device, a vehicle and a storage medium. The method comprises the steps that when a charging instruction is received, external charging equipment is controlled to charge a motor system and a power battery; when it is detected that charging of the motor system is completed, the motor system is controlled to charge the power battery. According to the scheme provided by the invention, the problem that the vehicle charging power improvement is limited when the voltage of the power battery is lower than the voltage capability of the external charging equipment can be effectively solved.

Description

Technical Field

[0001] The present application relates to the field of new energy vehicle technology, and in particular to a vehicle charging control method, device, vehicle and storage medium. Background Art

[0002] At present, the charging capacity of new energy vehicles is usually limited by the battery voltage, the maximum allowable current of the battery, the charging pile voltage and the maximum current of the charging pile. According to the definition of the national standard GBT-2015, there are three voltage platforms for public charging piles, namely, the maximum voltage U 充电桩 : 500V, 750V, 1000V; the maximum charging current of public charging pile is I 充电桩 ≤250A. Among them, the charging capacity of the charging pile: P 充电桩 =U 充电桩 I 充电桩 ; Vehicle charging capacity: P 车辆 =U 车辆 I 充电桩 .

[0003] In the related art, the vehicle voltage capability depends only on the battery voltage, that is, U 车辆 =U 电池 When the battery voltage is lower than the voltage capacity of the charging pile, the maximum charging capacity of the charging pile cannot be exerted, resulting in limited increase in vehicle charging power and low vehicle charging efficiency, affecting the user's charging experience. Summary of the invention

[0004] In order to solve or partially solve the problems existing in the related art, the present application provides a vehicle charging control method, device, vehicle and storage medium, which can effectively solve the problem of limited vehicle charging power increase when the power battery voltage is lower than the voltage capacity of the external charging equipment.

[0005] A first aspect of the present application provides a vehicle charging control method, wherein the vehicle includes a power battery and a motor system, and the method includes:

[0006] When a charging instruction is received, controlling an external charging device to charge the motor system and the power battery;

[0007] When it is detected that the motor system has completed charging, the motor system is controlled to charge the power battery.

[0008] In one embodiment, the vehicle further includes a motor controller system, the motor controller system includes N-phase bridge arms, the motor system includes N inductors, the N-phase bridge arms are respectively connected to the N inductors, N is a positive integer, any one of the N-phase bridge arms is a first bridge arm, and the first bridge arm includes a first switch tube and a second switch tube connected in series;

[0009] When receiving a charging instruction, controlling an external charging device to charge the motor system and the power battery comprises:

[0010] When a charging instruction is received, establishing a connection between the vehicle and an external charging device;

[0011] The first switch tube is controlled to be turned on and the second switch tube is controlled to be turned off, so as to transmit the input current of the external charging device to the first inductor connected to the first bridge arm, and then the input current is boosted by the first inductor to charge the power battery.

[0012] In one embodiment, when it is detected that the motor system has completed charging, controlling the motor system to charge the power battery includes:

[0013] When it is detected that charging of the motor system is completed, disconnecting the vehicle from the external charging device;

[0014] The second switch tube is controlled to be turned on and the first switch tube is controlled to be turned off, so as to transmit the current stored in the first inductor to the power battery.

[0015] In one embodiment, the motor controller system includes a first motor controller and a second motor controller connected in parallel to each other, and the motor system includes a first motor and a second motor connected in parallel to each other;

[0016] The first motor controller includes M-phase bridge arms, the first motor includes M inductors, the M-phase bridge arms are respectively connected to the M inductors, M is a positive integer, any one of the M-phase bridge arms is a second bridge arm, and the second bridge arm includes a third switch tube and a fourth switch tube connected in series;

[0017] The second motor controller includes a P-phase bridge arm, the second motor includes P inductors, the P-phase bridge arms are respectively connected to the P inductors, P is a positive integer, and N=P+M, wherein any one of the P-phase bridge arms is a third bridge arm, and the third bridge arm includes a fifth switch tube and a sixth switch tube connected in series;

[0018] The controlling the first switch tube to be turned on and the second switch tube to be turned off to transmit the input current of the external charging device to the first inductor connected to the first bridge arm, and then charging the power battery after boosting the input current through the first inductor, includes:

[0019] Respectively detecting whether the first motor and the second motor meet preset current rising conditions;

[0020] If neither the first motor nor the second motor meets the preset current boosting condition, the third switch tube and the fifth switch tube are controlled to be turned on, and the fourth switch tube and the sixth switch tube are turned off, so as to transmit the input current of the external charging device to the second inductor connected to the second bridge arm and the third inductor connected to the third bridge arm respectively, and then the input current is boosted through the second inductor and the third inductor to charge the power battery.

[0021] In one embodiment, the method further comprises:

[0022] If the first motor meets the preset current boost condition, the third switch tube is controlled to be turned on and the fourth switch tube is controlled to be turned off, so as to transmit the input current of the external charging device to the second inductor connected to the second bridge arm, and then the input current is boosted through the second inductor to charge the power battery.

[0023] In another embodiment, the method further comprises:

[0024] If the second motor meets the preset current boost condition, the fifth switch tube is controlled to be turned on and the sixth switch tube is turned off to transmit the input current of the external charging device to the third inductor connected to the third bridge arm, and then the input current is boosted by the third inductor to charge the power battery.

[0025] In one embodiment, controlling the second switch tube to be turned on and the first switch tube to be turned off to transmit the current stored in the first inductor to the power battery includes:

[0026] The fourth switch tube and the sixth switch tube are controlled to be turned on, and the third switch tube and the fifth switch tube are turned off, so as to transmit the current stored in the second inductor and the third inductor to the power battery.

[0027] In another embodiment, controlling the second switch tube to be turned on and the first switch tube to be turned off to transmit the current stored in the first inductor to the power battery includes:

[0028] The fourth switch tube is controlled to be turned on and the third switch tube is controlled to be turned off, so as to transmit the current stored in the second inductor to the power battery.

[0029] In yet another embodiment, controlling the second switch tube to be turned on and the first switch tube to be turned off to transmit the current stored in the first inductor to the power battery includes:

[0030] The sixth switch tube is controlled to be turned on and the fifth switch tube is controlled to be turned off, so as to transmit the current stored in the third inductor to the power battery.

[0031] In one embodiment, the completion of charging of the motor system is detected by:

[0032] Calculating the series voltage between the power battery and the motor system;

[0033] If the series voltage reaches the maximum voltage of the external charging device, it is detected that the motor system is fully charged.

[0034] A second aspect of the present application provides a vehicle charging control device, the vehicle comprising a power battery and a motor system, the device comprising:

[0035] A first charging control module, configured to control an external charging device to charge the motor system and the power battery when a charging instruction is received;

[0036] The second charging control module is used to control the motor system to charge the power battery when it is detected that the motor system has been fully charged.

[0037] A third aspect of the present application provides a vehicle, comprising:

[0038] Processor; and

[0039] The memory stores executable codes thereon, and when the executable codes are executed by the processor, the processor is caused to execute the method as described above.

[0040] A fourth aspect of the present application provides a computer-readable storage medium having executable code stored thereon. When the executable code is executed by a processor of a vehicle, the processor is caused to execute the method as described above.

[0041] The technical solution provided by this application may have the following beneficial effects:

[0042] The solution provided by this application controls the external charging device to charge the motor system and power battery of the vehicle when a charging instruction is received; when the motor system is detected to be fully charged, the motor system is controlled to charge the power battery. This application can achieve the function of voltage reduction and current increase by means of the motor system, so as to give full play to the maximum charging capacity of the external charging device, thereby increasing the vehicle charging power, improving the vehicle charging efficiency, and improving the user charging experience.

[0043] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail the exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0045] Figure 1 is a flow chart of a vehicle charging control method shown in an embodiment of the present application;

[0046] Figure 2 is another flow chart of the vehicle charging control method shown in the embodiment of the present application;

[0047] Figure 3 is a diagram showing the charging relationship between an external charging device and a vehicle according to an embodiment of the present application;

[0048] Figure 4 is a schematic diagram of a current path for charging a first motor, a second motor and a power battery using an external charging device according to an embodiment of the present application;

[0049] Figure 5 is a schematic diagram of a current path for charging a first motor and a power battery using an external charging device according to an embodiment of the present application;

[0050] Figure 6 is a schematic diagram of a current path for charging a second motor and a power battery using an external charging device according to an embodiment of the present application;

[0051] Figure 7 is a schematic diagram of a current path for charging a power battery by a first motor and a second motor shown in an embodiment of the present application;

[0052] Figure 8 is a schematic diagram of a current path for a first motor to charge a power battery as shown in an embodiment of the present application;

[0053] Fig. 9 is a schematic diagram of a current path for a second motor to charge a power battery as shown in an embodiment of the present application;

[0054] Fig.10 is a schematic structural diagram of a vehicle charging control device shown in an embodiment of the present application;

[0055] Fig.11 It is a schematic diagram of the structure of a vehicle shown in an embodiment of the present application. DETAILED DESCRIPTION

[0056] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0057] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0058] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0059] In the related art, the vehicle voltage capability depends only on the battery voltage, that is, U 车辆 =U 电池 , so the vehicle charging capacity: P 车辆 =U 车辆 I 充电桩 , becomes: P 车辆 =U 电池 I 充电桩 When the battery voltage is lower than the voltage capacity of the charging pile, especially when there is a large voltage difference between the battery voltage and the charging pile voltage, the maximum charging capacity of the charging pile cannot be exerted, that is, the upper limit capacity of the maximum voltage and maximum current of the charging pile cannot be exerted, resulting in limited increase in vehicle charging power and low vehicle charging efficiency, affecting the user's charging experience.

[0060] In response to the above problems, an embodiment of the present application provides a vehicle charging control method. By using the motor system, the voltage reduction and current increase function can be realized, so that the maximum charging capacity of the external charging device can be fully utilized, that is, the upper limit capacity of the maximum voltage and maximum current of the external charging device can be utilized, thereby increasing the vehicle charging power, improving the vehicle charging efficiency, and improving the user charging experience.

[0061] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0062] Figure 1 It is a flow chart of a vehicle charging control method shown in an embodiment of the present application.

[0063] See also Figure 1 , the vehicle charging control method of the present application comprises:

[0064] S110, when a charging instruction is received, controlling an external charging device to charge the motor system and the power battery.

[0065] Among them, the executor of the vehicle charging control can be any one of the vehicle control unit (VCU), motor controller (IPU, Intelligent Power Unit), and battery management system (BMS, Battery Management System) mounted on the vehicle. Among them, the vehicle controller is the assembly controller of the power system of the electric vehicle, which is mainly responsible for coordinating the work of various components such as the engine, drive motor, gearbox, power battery, etc. The motor controller is an integrated circuit that actively controls the motor to work in a set direction, speed, angle and response time. The battery management system is an important part of the power battery system of the electric vehicle, mainly for intelligent management and maintenance of each battery unit to prevent overcharging and over-discharging of the battery. The embodiment of the present application is illustrated by taking the vehicle controller as the executor.

[0066] The vehicle may be configured with a power battery and a motor system, and the power battery and the motor system may be connected in series, wherein the motor system may be configured between the power battery and an external charging device.

[0067] In actual applications, when a user wants to charge a vehicle, he can connect an external charging device to the vehicle through the vehicle's DC charging port to trigger a charging command. The external charging device can be a charging pile or another vehicle. After receiving the charging command, the vehicle controller can control the external charging device to charge the motor system and the power battery. At this time, the vehicle voltage capacity depends on both the motor system and the power battery, that is, U 车辆 =U 电机系统 +U 动力电池 Therefore, when the power battery voltage is lower than the voltage capacity of the external charging device, the embodiment of the present application can realize the function of voltage reduction and current increase by means of the motor system, so as to give full play to the upper limit capacity of the maximum voltage and maximum current of the external charging device, so that the external charging device can output at full load in a high voltage and high current state, and the motor system can reduce the voltage and increase the current of the power battery, thereby greatly improving the charging power of the vehicle. For example, the vehicle charging capacity: P 车辆=U 车辆 I 外部充电设备 , becomes: P 车辆 =(U 电机系统 +U 动力电池 )·I' 外部充电设备 , where (U 电机系统 +U 动力电池 ) can reach the maximum voltage of the external charging device, I' 外部充电设备 The maximum current of the external charging device can be reached.

[0068] S120, when it is detected that the motor system has been fully charged, controlling the motor system to charge the power battery.

[0069] The motor system may include an inductor, wherein the inductor itself does not consume electrical energy and is a kind of energy storage element. Therefore, the embodiment of the present application can store the input current of the external charging device through the inductor of the motor system. When it is detected that the current stored in the inductor of the motor system reaches the limit, it means that the charging of the motor system is completed. Therefore, the vehicle controller can control the motor system to charge the power battery so that the current stored in the inductor of the motor system can flow into the power battery.

[0070] As can be seen from this example, the solution provided by this application controls the external charging device to charge the motor system and the power battery when a charging instruction is received; and controls the motor system to charge the power battery when the motor system is detected to be fully charged. This application can achieve the function of voltage reduction and current increase by means of the motor system, so as to give full play to the maximum charging capacity of the external charging device, thereby increasing the vehicle charging power, improving the vehicle charging efficiency, and improving the user charging experience.

[0071] Figure 2 It is another flow chart of the vehicle charging control method shown in the present application.

[0072] See also Figure 2 , the vehicle charging control method of the present application comprises:

[0073] S210: When a charging instruction is received, a connection is established between the vehicle and an external charging device.

[0074] Among them, the vehicle can be configured with a power battery, a motor system, a motor controller system, and a switching circuit, and the motor system and the motor controller system can be connected in series with the power battery through the switching circuit. Among them, the embodiment of the present application can realize the reuse of the IGBT (Insulated Gate Bipolar Transistor) of the motor controller and the inductance of the motor through the motor controller system and the motor system, wherein the motor controller system may include an N-phase bridge arm, the motor system may include N inductors, and the N-phase bridge arms are respectively connected to the N inductors, where N is a positive integer. Any phase bridge arm in the N-phase bridge arm can be a first bridge arm, and the first bridge arm may include a first switch tube and a second switch tube connected in series.

[0075] like Figure 3 As shown, V1 is the power battery of the vehicle, J1 is the external charging device (charging pile or other vehicle), and the switching circuit may include a first contactor S1, a second contactor S2, a third contactor S3, a fourth contactor S4, a fifth contactor S5, a sixth contactor S6, a first capacitor C1, a second capacitor C2 and a third capacitor C3. Among them, one end of the first contactor S1 is connected to the positive pole of the external charging device, and the other end is connected to the first switch tube of the first bridge arm of the motor controller system, and connected to the positive pole of the power battery through the fifth contactor S5; one end of the second contactor S2 is connected to the negative pole of the external charging device, and the other end is connected to the negative pole of the power battery through the fourth contactor S4; one end of the third contactor S3 is connected to the positive pole of the power battery, and the other end is connected to the N inductors of the motor system; one end of the fourth contactor S4 is connected to the negative pole of the power battery, and the other end is connected to the second switch tube of the first bridge arm of the motor controller system, and connected to the negative pole of the external charging device through the second contactor S2; one end of the fifth contactor S5 is connected to the positive pole of the power battery, and the other end is connected to the first switch tube of the first bridge arm of the motor controller system, and connected to the positive pole of the external charging device through the first contactor S1; one end of the sixth contactor S6 is connected to the N inductors of the motor system, and the other end is connected to the positive pole of the power battery through the third contactor S3. Therefore, the embodiment of the present application can realize the connection or disconnection between the vehicle and the external charging device by controlling the conduction or disconnection of each contactor in the switch circuit.

[0076] In actual application, when the user wants to charge the vehicle, the external charging device can be connected to the vehicle through the DC charging port of the vehicle to trigger the charging instruction. Among them, the external charging device can be a charging pile or other vehicles. After receiving the charging instruction, the vehicle controller can establish a connection between the vehicle and the external charging device by controlling the first contactor S1, the second contactor S2, the third contactor S3, the fourth contactor S4, and the sixth contactor S6 in the switch circuit to close, and controlling the fifth contactor S5 to disconnect, so that the input current of the external charging device passes through the motor system and then flows into the power battery.

[0077] S220, controlling the first switch tube to be turned on and the second switch tube to be turned off, so as to transmit the input current of the external charging device to the first inductor connected to the first bridge arm, and then boosting the input current through the first inductor to charge the power battery.

[0078] The vehicle controller can control the external charging device to charge the motor system and the power battery. At this time, the vehicle voltage capacity depends on both the motor system and the power battery, that is, U 车辆 =U 电机系统 +U 动力电池 Therefore, when the power battery voltage is lower than the voltage capacity of the external charging device, the embodiment of the present application can realize the function of voltage reduction and current increase by means of the motor system, so as to give full play to the upper limit capacity of the maximum voltage and maximum current of the external charging device, so that the external charging device can output at full load in a high voltage and high current state, and the motor system can reduce the voltage and increase the current of the power battery, thereby greatly improving the charging power of the vehicle. For example, the vehicle charging capacity: P 车辆 =U 车辆 I 外部充电设备 , becomes: P 车辆 =(U 电机系统 +U 动力电池 )·I' 外部充电设备 , where (U 电机系统 +U 动力电池 ) can reach the maximum voltage of the external charging device, I' 外部充电设备 The maximum current of the external charging device can be reached.

[0079] In a specific implementation, the first switch tube of the first bridge arm of the motor controller system can be used to transmit the input current of the external charging device to the first inductor connected to the first bridge arm in the motor system. Therefore, when the vehicle is connected to the external charging device, the vehicle controller can control the first switch tube of the first bridge arm of the motor controller system to be turned on, so that the input current of the external charging device passes through the first switch tube and flows into the first inductor connected to the first bridge arm, so that the input current is boosted through the first inductor, and then the boosted current flows into the power battery, thereby realizing the function of reducing the voltage and increasing the current of the power battery.

[0080] In one embodiment, the motor controller system includes a first motor controller and a second motor controller connected in parallel to each other, and the motor system includes a first motor and a second motor connected in parallel to each other.

[0081] In one embodiment, the first motor controller includes M-phase bridge arms, the first motor includes M inductors, the M-phase bridge arms are respectively connected to the M inductors, M is a positive integer, wherein any phase bridge arm of the M-phase bridge arms is the second bridge arm, and the second bridge arm includes a third switch tube and a fourth switch tube connected in series.

[0082] In one embodiment, the second motor controller includes a P-phase bridge arm, the second motor includes P inductors, the P-phase bridge arms are respectively connected to the P inductors, P is a positive integer, and N=P+M, wherein any phase bridge arm in the P-phase bridge arm is the third bridge arm, and the third bridge arm includes a fifth switch tube and a sixth switch tube connected in series.

[0083] like Figure 3 As shown, M is 3, P is 3, and N is 6, wherein the first transistor Q1 to the sixth transistor Q6 can constitute a three-phase bridge arm of the first motor controller, and the seventh transistor Q7 to the twelfth transistor Q12 can constitute a three-phase bridge arm of the second motor controller. Specifically, the first transistor Q1 and the second transistor Q2 can constitute a one-phase bridge arm of the first motor controller, the third transistor Q3 and the fourth transistor Q4 can constitute a one-phase bridge arm of the first motor controller, the fifth transistor Q5 and the sixth transistor Q6 can constitute a one-phase bridge arm of the first motor controller, and any one of the three-phase bridge arms of the first motor controller can be used as the second bridge arm, and the second bridge arm can include a third switch tube and a fourth switch tube connected in series, wherein the first transistor Q1, the third transistor Q3 and the fifth transistor Q5 all belong to the third switch tube, and the second transistor Q2, the fourth transistor Q4 and the sixth transistor Q6 all belong to the fourth switch tube. Similarly, the seventh transistor Q7 and the eighth transistor Q8 can constitute a single-phase bridge arm of the second motor controller, the ninth transistor Q9 and the tenth transistor Q10 can constitute a single-phase bridge arm of the second motor controller, the eleventh transistor Q11 and the twelfth transistor Q12 can constitute a single-phase bridge arm of the second motor controller, any one of the three-phase bridge arms of the second motor controller can serve as the third bridge arm, and the third bridge arm can include a fifth switch tube and a sixth switch tube connected in series, wherein the seventh transistor Q7, the ninth transistor Q9 and the eleventh transistor Q11 all belong to the fifth switch tube, and the eighth transistor Q8, the tenth transistor Q10 and the twelfth transistor Q12 all belong to the sixth switch tube.

[0084] The motor system may include a first motor and a second motor connected in parallel, and the two motors may correspond to a dual-motor vehicle product. Figure 3As shown, the first motor may include an inductor Lc, an inductor Lb and an inductor La, wherein any one of the three inductors of the first motor may be a second inductor connected to the second bridge arm, that is, the second inductor may be inductor Lc / inductor Lb / inductor La. Wherein, the inductor Lc is connected to the midpoint between the first transistor Q1 and the second transistor Q2, the inductor Lb is connected to the midpoint between the third transistor Q3 and the fourth transistor Q4, and the inductor La is connected to the midpoint between the fifth transistor Q5 and the sixth transistor Q6. Similarly, the second motor may include an inductor Lf, an inductor Le and an inductor Ld, wherein any one of the three inductors of the second motor may be a third inductor connected to the third bridge arm, that is, the third inductor may be inductor Lf / inductor Le / inductor Ld. The inductor Lf is connected to the midpoint between the seventh transistor Q7 and the eighth transistor Q8 , the inductor Lb is connected to the midpoint between the ninth transistor Q9 and the tenth transistor Q10 , and the inductor Ld is connected to the midpoint between the eleventh transistor Q11 and the twelfth transistor Q12 .

[0085] In one embodiment, controlling the first switch tube to be turned on and the second switch tube to be turned off to transmit the input current of the external charging device to the first inductor connected to the first bridge arm, and then charging the power battery after the input current is boosted by the first inductor, may include:

[0086] Respectively detect whether the first motor and the second motor meet the preset current boosting conditions; if both the first motor and the second motor do not meet the preset current boosting conditions, control the third switch tube and the fifth switch tube to be turned on, and the fourth switch tube and the sixth switch tube to be turned off, so as to transmit the input current of the external charging device to the second inductor connected to the second bridge arm and the third inductor connected to the third bridge arm respectively, and then boost the input current through the second inductor and the third inductor to charge the power battery.

[0087] Both the first motor and the second motor have rated currents. For example, the rated currents of the first motor and the second motor are both 200A, and the maximum current of the external charging device can reach 250A. If a single motor is used to reduce the voltage and increase the current, the motor will have an overcurrent (overload) situation. In addition, both the first motor and the second motor have the function of reducing the voltage and increasing the current. Among them, since the two motors are in a parallel structure, the voltage reduction capacity of the two motors is the same as that of a single motor. Among them, since the first motor and the second motor are both in series with the power battery, the current increase capacity of the two motors is greater than the current increase capacity of a single motor.

[0088] In this regard, the embodiment of the present application can set a preset current increase condition based on the maximum charging power of the external charging device, and then can respectively detect whether the first motor and the second motor meet the preset current increase condition, so as to determine whether to use a single motor for voltage reduction and current increase or to use two motors for voltage reduction and current increase, so as to select the most suitable voltage reduction and current increase scheme to avoid overcurrent of the motor (the first motor or the second motor).

[0089] Specifically, the vehicle controller can calculate the current of the charging circuit based on the ratio between the maximum charging power of the external charging device and the voltage of the power battery. Then determine the current I of the charging circuit 充电回路 Is it greater than the rated current I of a single motor? 电机 , if I 电机 充电回路 , indicating that when a single motor is used to reduce voltage and increase current, the motor will not only have an overcurrent condition, but also the current increase capability of the motor cannot reach the maximum charging power of the external charging device. Therefore, it can be detected that the motor does not meet the preset current increase condition; if I 电机 ≥I 充电回路 , indicating that a single motor is used to reduce voltage and increase current. The motor will not have overcurrent, and the current increase capability of the motor can reach the maximum charging power of the external charging device. Therefore, it can be detected that the motor meets the preset current increase condition. 电机 It can be the current of the first motor or the second motor.

[0090] If the first motor does not meet the preset current increase condition, and the second motor does not meet the preset current increase condition, it means that using a single motor will cause overcurrent, and the maximum charging power of the external charging device cannot be reached, so two motors can be used to reduce voltage and increase current. Specifically, the vehicle controller can control the third switch tube of the second bridge arm of the first motor controller to be turned on and the fourth switch tube to be turned off, and can control the fifth switch tube of the third bridge arm of the second motor controller to be turned on and the sixth switch tube to be turned off, so that the input current of the external charging device passes through the third switch tube and flows into the second inductor connected to the second bridge arm in the first motor, and the input current of the external charging device passes through the fifth switch tube and flows into the third inductor connected to the third bridge arm in the second motor, so that the input current of the external charging device is increased by the second inductor and the third inductor together, and then the increased current flows into the power battery, thereby realizing the function of reducing voltage and increasing current for the power battery.

[0091] like Figure 3 ​As shown, the third switch tube may include at least one of the first transistor Q1, the third transistor Q3 and the fifth transistor Q5, the fourth switch tube may include at least one of the second transistor Q2, the fourth transistor Q4 and the sixth transistor Q6, the fifth switch tube may include at least one of the seventh transistor Q7, the ninth transistor Q9 and the eleventh transistor Q11, and the sixth switch tube may include at least one of the eighth transistor Q8, the tenth transistor Q10 and the twelfth transistor Q12.

[0092] It should be noted that, in the embodiment of the present application, according to actual charging requirements, the first preset number of bridge arms of the first motor controller can be used as the second bridge arm, and the second preset number of bridge arms of the second motor controller can be used as the third bridge arm. The range of the first preset number can be [1, M], and the range of the second preset number can be [1, P]. The embodiment of the present application does not limit this.

[0093] In one example, if Figure 4 As shown, the vehicle controller can control the first transistor Q1, the third transistor Q3 and the fifth transistor Q5 to be turned on, and the second transistor Q2, the fourth transistor Q4 and the sixth transistor Q6 to be turned off, so that the third switch tube of the second bridge arm of the first motor controller is turned on and the fourth switch tube is turned off, and at the same time, the seventh transistor Q7, the ninth transistor Q9 and the eleventh transistor Q11 are turned on, and the eighth transistor Q8, the tenth transistor Q10 and the twelfth transistor Q12 are turned off, so that the fifth switch tube of the third bridge arm of the second motor controller is turned on and the sixth switch tube is turned off. In this way, the input current of the external charging device can flow into the power battery through two paths (path 1 and path 2), where path 1 is: J1+→S1→Q1, Q3, Q5→Lc, Lb, La→O1→S3→V1+→V1-→S4→S2→J-. Path 2 is: J1+→S1→Q7, Q9, Q11→Lf, Le, Ld→O2→S6→S3→V1+→V1-→S4→S2→J-. It can be seen that through path 1 and path 2, the inductance of the two motors can jointly boost the input current of the external charging device to charge the power battery.

[0094] In one embodiment, the method may further include:

[0095] If the first motor meets the preset current boosting condition, the third switch tube is controlled to be turned on and the fourth switch tube is turned off to transmit the input current of the external charging device to the second inductor connected to the second bridge arm, and then the input current is boosted by the second inductor to charge the power battery.

[0096] If the first motor meets the preset current increase condition, and the second motor does not meet the preset current increase condition, it means that the first motor will not have an overcurrent condition, and the current increase capacity of the first motor can reach the maximum charging power of the external charging device. Therefore, the first motor can be used to reduce the voltage and increase the current.

[0097] In one example, if the first motor meets the preset boost condition, and the second motor does not meet the preset boost condition, the vehicle controller can control the third switch tube of the second bridge arm of the first motor controller to turn on and the fourth switch tube to turn off, so that the input current of the external charging device passes through the third switch tube and flows into the second inductor connected to the second bridge arm in the first motor, so that the input current of the external charging device is boosted through the second inductor, and then the boosted current flows into the power battery, thereby realizing the function of reducing the voltage and boosting the current of the power battery. For example, Figure 5 As shown, the vehicle controller can control the first transistor Q1, the third transistor Q3 and the fifth transistor Q5 to be turned on, and control the second transistor Q2, the fourth transistor Q4 and the sixth transistor Q6 to be turned off, so that the third switch tube of the second bridge arm of the first motor controller is turned on and the fourth switch tube is turned off. In this way, the input current of the external charging device can flow into the power battery through a path, wherein the path is: J1+→S1→Q1, Q3, Q5→Lc, Lb, La→O1→S3→V1+→V1-→S4→S2→J-. It can be seen that through this path, the inductance of the first motor can boost the input current of the external charging device to charge the power battery.

[0098] In another embodiment, the method may further include:

[0099] If the second motor meets the preset current boosting condition, the fifth switch tube is controlled to be turned on and the sixth switch tube is turned off to transmit the input current of the external charging device to the third inductor connected to the third bridge arm, and then the input current is boosted by the third inductor to charge the power battery.

[0100] If the second motor meets the preset current increase conditions, and the first motor does not meet the preset current increase conditions, it means that the second motor will not have an overcurrent condition, and the current increase capacity of the second motor can reach the maximum charging power of the external charging device. Therefore, the second motor can be used to reduce the voltage and increase the current.

[0101] In another example, if the second motor meets the preset boost condition, but the first motor does not meet the preset boost condition, the vehicle controller can control the fifth switch tube of the third bridge arm of the second motor controller to turn on and the sixth switch tube to turn off, so that the input current of the external charging device passes through the fifth switch tube and flows into the third inductor connected to the third bridge arm in the second motor, so that the input current of the external charging device is boosted through the third inductor, and then the boosted current flows into the power battery, thereby realizing the function of reducing the voltage and boosting the current of the power battery. For example, Figure 6 As shown, the vehicle controller can control the seventh transistor Q7, the ninth transistor Q9 and the eleventh transistor Q11 to be turned on, and control the eighth transistor Q8, the tenth transistor Q10 and the twelfth transistor Q12 to be turned off, so that the fifth switch tube of the third bridge arm of the second motor controller is turned on and the sixth switch tube is turned off. In this way, the input current of the external charging device can flow into the power battery through a path, wherein the path is: J1+→S1→Q7, Q9, Q11→Lf, Le, Ld→O2→S6→S3→V1+→V1-→S4→S2→J-. It can be seen that through this path, the inductance of the second motor can boost the input current of the external charging device to charge the power battery.

[0102] In yet another embodiment, the method may further include:

[0103] If both the first motor and the second motor meet the preset current boosting conditions, the third switch tube or the fifth switch tube is controlled to be turned on, and the fourth switch tube or the sixth switch tube is turned off, so as to transmit the input current of the external charging device to the second inductor connected to the second bridge arm or the third inductor connected to the third bridge arm, and then the input current is boosted through the second inductor or the third inductor to charge the power battery.

[0104] If the first motor meets the preset current increase condition and the second motor also meets the preset current increase condition, it means that neither the first motor nor the second motor will have overcurrent, and the current increase capacity of the first motor or the current increase capacity of the second motor can reach the maximum charging capacity of the charging pile. Therefore, the first motor or the second motor can be used to reduce the voltage and increase the current.

[0105] In another example, if the first motor meets the preset current boosting condition, and the second motor also meets the preset current boosting condition, the vehicle controller can control the third switch tube of the second bridge arm of the first motor controller to be turned on and the fourth switch tube to be turned off, or can control the fifth switch tube of the third bridge arm of the second motor controller to be turned on and the sixth switch tube to be turned off, so that the input current of the external charging device passes through the third switch tube and flows into the second inductor connected to the second bridge arm in the first motor, or the input current of the external charging device passes through the fifth switch tube and flows into the third inductor connected to the third bridge arm in the second motor, so that the input current of the external charging device is boosted through the second inductor or the third inductor, and then the boosted current flows into the power battery, thereby realizing the function of reducing the voltage and boosting the current of the power battery. For example, Figure 4 As shown, the vehicle controller can control the first transistor Q1, the third transistor Q3 and the fifth transistor Q5 to be turned on, and the second transistor Q2, the fourth transistor Q4 and the sixth transistor Q6 to be turned off, so that the third switch tube of the second bridge arm of the first motor controller is turned on and the fourth switch tube is turned off, or control the seventh transistor Q7, the ninth transistor Q9 and the eleventh transistor Q11 to be turned on, and the eighth transistor Q8, the tenth transistor Q10 and the twelfth transistor Q12 to be turned off, so that the fifth switch tube of the third bridge arm of the second motor controller is turned on and the sixth switch tube is turned off. In this way, the input current of the external charging device can flow into the power battery through path 1 or path 2, wherein path 1 is: J1+→S1→Q1, Q3, Q5→Lc, Lb, La→O1→S3→V1+→V1-→S4→S2→J-. Path 2 is: J1+→S1→Q7, Q9, Q11→Lf, Le, Ld→O2→S6→S3→V1+→V1-→S4→S2→J-. It can be seen that through path 1 or path 2, the inductance of the first motor or the second motor can boost the input current of the external charging device to charge the power battery.

[0106] It should be noted that Figure 4 Path 1 is Figure 5 The current path, Figure 4 Path 2 is Figure 6 current path.

[0107] S230: When it is detected that the motor system is fully charged, the vehicle is disconnected from the external charging device.

[0108] The inductance of the motor system itself does not consume electrical energy, and it is a kind of energy storage element. Therefore, the embodiment of the present application can store the input current of the external charging device through the inductance of the motor system. When it is detected that the current stored in the inductance of the motor system reaches the limit, it means that the charging of the motor system is completed, so the vehicle controller can disconnect the vehicle from the external charging device.

[0109] In a specific implementation, when it is detected that the motor system is fully charged, the vehicle controller can disconnect the vehicle from the external charging device by controlling the third contactor S3, the fourth contactor S4, and the sixth contactor S6 in the switch circuit to close, and controlling the first contactor S1, the second contactor S2, and the fifth contactor S5 to open.

[0110] In one embodiment, the completion of charging of the motor system may be detected by:

[0111] The series voltage between the power battery and the motor system is calculated; if the series voltage reaches the maximum voltage of the external charging device, it is detected that the motor system is fully charged.

[0112] In the process of voltage reduction and current increase, the vehicle voltage capability depends on both the motor system and the power battery, that is, U 车辆 =U 电机系统 +U 动力电池 , making the vehicle charging capacity: P 车辆 =U 车辆 I 外部充电设备 , becomes: P 车辆 =(U 电机系统 +U 动力电池 )·I' 外部充电设备 .

[0113] Since the first motor and the second motor are in parallel structure, the voltage of the first motor is the same as the voltage of the second motor. Therefore, the voltage of the motor system can be either the voltage of the first motor or the voltage of the second motor, that is, U 电机系统 =U 第一电机 =U 第二电机 Therefore, the vehicle controller can calculate the series voltage between the power battery and the first motor: U 动力电池 +U 第一电机 , or calculate the series voltage of the power battery and the second motor: U 动力电池 +U 第二电机 .

[0114] If the series voltage of the power battery and the first motor (U 动力电池 +U 第一电机 ) reaches the maximum voltage of the external charging device, indicating that the current stored in the second inductor of the first motor has reached the limit, so it can be detected that the charging of the first motor is complete. Alternatively, if the series voltage (U 动力电池 +U 第二电机 ) reaches the maximum voltage of the external charging device, indicating that the current stored in the third inductor of the second motor has reached the limit, so the second motor can be detected to be fully charged. The first motor or the second motor is fully charged, which can indicate that the motor system is fully charged.

[0115] S240, controlling the second switch tube to be turned on and the first switch tube to be turned off, so as to transmit the current stored in the first inductor to the power battery.

[0116] The second switch tube of the first bridge arm of the motor controller system can be used to transmit the current stored in the first inductor of the motor system to the power battery. Therefore, after disconnecting the vehicle from the external charging device, the vehicle controller can control the second switch tube of the first bridge arm of the motor controller system to turn on and the first switch tube to turn off, so that the current stored in the first inductor of the motor system passes through the second switch tube and flows into the power battery.

[0117] In one embodiment, controlling the second switch tube to be turned on and the first switch tube to be turned off to transmit the current stored in the first inductor to the power battery may include:

[0118] The fourth switch tube and the sixth switch tube are controlled to be turned on, and the third switch tube and the fifth switch tube are turned off, so as to transmit the current stored in the second inductor and the third inductor to the power battery.

[0119] The vehicle controller can control the on or off of the corresponding motor controller according to the storage current of each motor.

[0120] In one example, if the first motor and the second motor jointly step down the voltage and increase the current of the power battery, the second inductor of the first motor and the third inductor of the second motor both store the input current of the external charging device. Therefore, the vehicle controller can control the fourth switch tube of the second bridge arm of the first motor controller to be turned on and the third switch tube to be turned off, and control the sixth switch tube of the third bridge arm of the second motor controller to be turned on and the fifth switch tube to be turned off, so that the current stored in the second inductor of the first motor and the third inductor of the second motor respectively flows into the power battery, and then flows back to the second inductor through the fourth switch tube, and flows back to the third inductor through the sixth switch tube.

[0121] In one example, if Figure 7As shown, the vehicle controller can control the second transistor Q2, the fourth transistor Q4 and the sixth transistor Q6 to be turned on, and the first transistor Q1, the third transistor Q3 and the fifth transistor Q5 to be turned off, so that the fourth switch tube of the second bridge arm of the first motor controller is turned on and the third switch tube is turned off, and at the same time, the eighth transistor Q8, the tenth transistor Q10 and the twelfth transistor Q12 are controlled to be turned on, and the seventh transistor Q7, the ninth transistor Q9 and the eleventh transistor Q11 are turned off, so that the sixth switch tube of the third bridge arm of the second motor controller is turned on and the fifth switch tube is turned off. In this way, the current stored in the second inductor of the first motor can flow into the power battery through path 3, and the current stored in the third inductor of the second motor can flow into the power battery through path 4, wherein path 3 is: Lc, Lb, La→O1→S3→V1+→V1-→S4→Q2, Q4, Q6→Lc, Lb, La. Path 4 is: Lf, Le, Ld→O2→S6→S3→V1+→V1-→S4→Q8, Q10, Q12→Lf, Le, Ld. It can be seen that through path 3 and path 4, the current stored in the inductance of the two motors can flow into the power battery together.

[0122] In another embodiment, controlling the second switch tube to be turned on and the first switch tube to be turned off to transmit the current stored in the first inductor to the power battery may include:

[0123] The fourth switch tube is controlled to be turned on and the third switch tube is controlled to be turned off, so as to transmit the current stored in the second inductor to the power battery.

[0124] In another example, if the first motor is used to step down the voltage of the power battery and increase the current, the second inductor of the first motor stores the input current of the external charging device, so the vehicle controller can control the fourth switch tube of the second bridge arm of the first motor controller to turn on and the third switch tube to turn off, so that the current stored in the second inductor of the first motor flows into the power battery, and then flows back to the second inductor through the fourth switch tube. For example, Figure 8 As shown, the vehicle controller can control the second transistor Q2, the fourth transistor Q4 and the sixth transistor Q6 to be turned on, and the first transistor Q1, the third transistor Q3 and the fifth transistor Q5 to be turned off, so that the fourth switch tube of the second bridge arm of the first motor controller is turned on and the third switch tube is turned off. In this way, the current stored in the second inductor of the first motor can flow into the power battery through the set path, wherein the set path is: Lc, Lb, La→O1→S3→V1+→V1-→S4→Q2, Q4, Q6→Lc, Lb, La. It can be seen that through this set path, the current stored in the second inductor of the first motor can flow into the power battery.

[0125] In yet another embodiment, controlling the second switch tube to be turned on and the first switch tube to be turned off to transmit the current stored in the first inductor to the power battery may include:

[0126] The sixth switch tube is controlled to be turned on and the fifth switch tube is controlled to be turned off, so as to transmit the current stored in the third inductor to the power battery.

[0127] In another example, if the second motor is used to step down the voltage of the power battery and increase the current, the third inductor of the second motor stores the input current of the external charging device, so the vehicle controller can control the sixth switch tube of the third bridge arm of the second motor controller to turn on and the fifth switch tube to turn off, so that the current stored in the third inductor of the second motor flows into the power battery, and then flows back to the third inductor through the sixth switch tube. For example, Fig. 9 As shown, the vehicle controller can control the eighth transistor Q8, the tenth transistor Q10 and the twelfth transistor Q12 to be turned on, and the seventh transistor Q7, the ninth transistor Q9 and the eleventh transistor Q11 to be turned off, so that the sixth switch tube of the third bridge arm of the second motor controller is turned on and the fifth switch tube is turned off. In this way, the current stored in the third inductor of the second motor can flow into the power battery through the set path, wherein the set path is: Lf, Le, Ld→O2→S6→S3→V1+→V1-→S4→Q8, Q10, Q12→Lf, Le, Ld. It can be seen that through this set path, the current stored in the third inductor of the second motor can flow into the power battery.

[0128] It should be noted that Figure 7 Path 3 is Figure 8 The current path, Figure 7 Path 4 is Fig. 9 current path.

[0129] It can be seen that the embodiment of the present application can achieve the following by setting a motor system between the external charging device and the power battery: 电机系统 +U 动力电池 =U' 外部充电设备 , so that: U 车辆 =U' 外部充电设备 , where U' 外部充电设备 is the maximum voltage of the external charging device, so the maximum voltage of the external charging device can be fully utilized. In addition, the two motors are in parallel structure and are in series relationship with the power battery, so the maximum current of the external charging device can be fully utilized. In this way, the embodiment of the present application can greatly improve the vehicle charging power by fully utilizing the upper limit capacity of the maximum voltage and maximum current of the external charging device, so as to achieve the purpose of fast charging. For example, the vehicle charging capacity: P 车辆 =U 车辆 I 外部充电设备 , becomes: P 车辆 =(U 电机系统 +U 动力电池 )·I' 外部充电设备 , where (U电机系统 +U 动力电池 ) can reach the maximum voltage of the external charging device, I' 外部充电设备 The maximum current of the external charging device can be reached, which can greatly increase the vehicle charging power and achieve the purpose of fast charging, as shown in Table 1 below:

[0130] 500V charging station 750v charging station 1000v charging pile Vehicle voltage platform 400V Charging power can be increased by 20% Charging power can be increased by 50% Charging power can be increased by 200% Vehicle voltage platform 800V Charging power increase is limited Limited improvement in charging power Charging power can be increased by 20%

[0131] Table 1

[0132] Among them, the voltage represented by the vehicle voltage platform is the power battery voltage. From Table 1, it can be seen that when U 动力电池 充电桩 In this embodiment of the present application, the motor system can realize the function of voltage reduction and current increase, thereby greatly improving the vehicle charging power and achieving the purpose of fast charging. Among them, the greater the voltage difference between the charging pile voltage and the power battery voltage, the greater the increase in the vehicle charging power. This is because the voltage difference between the charging pile voltage and the power battery voltage is given to the motor system, and the motor system itself does not consume electrical energy. Therefore, the greater the voltage difference between the charging pile voltage and the power battery voltage, the faster the motor system is charged. After the motor system is charged, the connection between the vehicle and the charging pile can be disconnected, and then the current stored in the motor system can be released to the power battery. Therefore, the vehicle charging power can be greatly improved, the vehicle charging efficiency can be improved, and the user charging experience can be improved.

[0133] As can be seen from this example, the solution provided by this application can achieve the function of step-down and step-up by means of the motor system, so that the maximum charging capacity of the external charging device can be fully utilized, and the vehicle charging power can be increased, the vehicle charging efficiency can be improved, and the user charging experience can be improved. Furthermore, this application can achieve the feasibility of increasing the charging current by fully utilizing the limits of the external charging device without changing the existing electric drive design by reusing the IGBT of the motor controller and the inductance of the motor. Furthermore, this application determines whether to use a single motor for step-down and step-up or to use two motors for step-down and step-up according to the maximum charging power of the external charging device, so as to select the most suitable step-down and step-up solution, thereby avoiding the occurrence of motor overcurrent.

[0134] Corresponding to the aforementioned application function implementation method embodiment, the present application also provides a vehicle charging control device, a vehicle, a computer-readable storage medium and corresponding embodiments.

[0135] Fig.10 It is a schematic diagram of the structure of a vehicle charging control device shown in an embodiment of the present application.

[0136] See also Fig.10 The present application provides a vehicle charging control device, the vehicle includes a power battery and a motor system, and the device may include:​

[0137] A first charging control module 1010 is used to control an external charging device to charge the motor system and the power battery when a charging instruction is received;

[0138] The second charging control module 1020 is used to control the motor system to charge the power battery when it is detected that the motor system has been charged.

[0139] In one embodiment, the vehicle further includes a motor controller system, the motor controller system includes N-phase bridge arms, the motor system includes N inductors, the N-phase bridge arms are respectively connected to the N inductors, N is a positive integer, any one of the N-phase bridge arms is a first bridge arm, and the first bridge arm includes a first switch tube and a second switch tube connected in series;

[0140] The first charging control module 1010 may include:

[0141] A connection establishment submodule, used to establish a connection between the vehicle and an external charging device when a charging instruction is received;

[0142] The current boost charging submodule is used to control the first switch tube to be turned on and the second switch tube to be turned off, so as to transmit the input current of the external charging device to the first inductor connected to the first bridge arm, and then charge the power battery after the input current is boosted by the first inductor.

[0143] In one implementation, the second charging control module 1020 may include:

[0144] A connection and disconnection submodule, used to disconnect the vehicle from the external charging device when it is detected that the motor system is fully charged;

[0145] The freewheeling charging submodule is used to control the second switch tube to be turned on and the first switch tube to be turned off, so as to transmit the current stored in the first inductor to the power battery.

[0146] In one embodiment, the motor controller system includes a first motor controller and a second motor controller connected in parallel to each other, and the motor system includes a first motor and a second motor connected in parallel to each other;

[0147] The first motor controller includes M-phase bridge arms, the first motor includes M inductors, the M-phase bridge arms are respectively connected to the M inductors, M is a positive integer, wherein any one of the M-phase bridge arms is the second bridge arm, and the second bridge arm includes a third switch tube and a fourth switch tube connected in series;

[0148] The second motor controller includes a P-phase bridge arm, the second motor includes P inductors, the P-phase bridge arms are respectively connected to the P inductors, P is a positive integer, and N=P+M, wherein any one of the P-phase bridge arms is a third bridge arm, and the third bridge arm includes a fifth switch tube and a sixth switch tube connected in series;

[0149] The boost charging submodule may include:

[0150] A preset upflow condition judgment unit, used to respectively detect whether the first motor and the second motor meet the preset upflow condition;

[0151] The first current boost charging unit is used to control the third switch tube and the fifth switch tube to be turned on and the fourth switch tube and the sixth switch tube to be turned off if the first motor and the second motor do not meet the preset current boost conditions, so as to transmit the input current of the external charging device to the second inductor connected to the second bridge arm and the third inductor connected to the third bridge arm respectively, and then boost the input current through the second inductor and the third inductor to charge the power battery.

[0152] In one embodiment, the boost charging submodule may further include:

[0153] The second current boost charging unit is used to control the third switch tube to be turned on and the fourth switch tube to be turned off if the first motor meets the preset current boost condition, so as to transmit the input current of the external charging device to the second inductor connected to the second bridge arm, and then boost the input current through the second inductor to charge the power battery.

[0154] In another embodiment, the boost charging submodule may further include:

[0155] The third current boost charging unit is used to control the fifth switch tube to be turned on and the sixth switch tube to be turned off if the second motor meets the preset current boost condition, so as to transmit the input current of the external charging device to the third inductor connected to the third bridge arm, and then boost the input current through the third inductor to charge the power battery.

[0156] In one embodiment, the freewheeling charging submodule may include:

[0157] The first freewheeling charging unit is used to control the fourth switch tube and the sixth switch tube to be turned on, and the third switch tube and the fifth switch tube to be turned off, so as to transmit the current stored in the second inductor and the third inductor to the power battery.

[0158] In another embodiment, the freewheeling charging submodule may include:

[0159] The fourth switch tube is controlled to be turned on and the third switch tube is controlled to be turned off, so as to transmit the current stored in the second inductor to the power battery.

[0160] In yet another embodiment, the freewheeling charging submodule may include:

[0161] The sixth switch tube is controlled to be turned on and the fifth switch tube is controlled to be turned off, so as to transmit the current stored in the third inductor to the power battery.

[0162] In one embodiment, the completion of charging of the motor system can be detected by the following modules:

[0163] A series voltage calculation module, used to calculate the series voltage between the power battery and the motor system;

[0164] The charging completion detection module is used to detect that the motor system is fully charged if the series voltage reaches the maximum voltage of the external charging device.

[0165] As can be seen from this example, the solution provided by this application controls the external charging device to charge the motor system and the power battery when a charging instruction is received; and controls the motor system to charge the power battery when the motor system is detected to be fully charged. This application can achieve the function of voltage reduction and current increase by means of the motor system, so as to give full play to the maximum charging capacity of the external charging device, thereby increasing the vehicle charging power, improving the vehicle charging efficiency, and improving the user charging experience.

[0166] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated again here.

[0167] Fig.11 It is a schematic diagram of the structure of a vehicle shown in an embodiment of the present application.

[0168] See also Fig.11 , the vehicle 1100 includes a memory 1110 and a processor 1120 .

[0169] The processor 1120 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0170] The memory 1110 may include various types of storage units, such as system memory, read-only memory (ROM), and permanent storage. Among them, ROM may store static data or instructions required by the processor 1120 or other modules of the computer. The permanent storage may be a readable and writable storage device. The permanent storage may be a non-volatile storage device that does not lose the stored instructions and data even after the computer is powered off. In some embodiments, the permanent storage device uses a large-capacity storage device (such as a magnetic or optical disk, flash memory) as a permanent storage device. In other embodiments, the permanent storage device may be a removable storage device (such as a floppy disk, optical drive). The system memory may be a readable and writable storage device or a volatile readable and writable storage device, such as a dynamic random access memory. The system memory may store some or all instructions and data required by the processor at run time. In addition, the memory 1110 may include any combination of computer-readable storage media, including various types of semiconductor memory chips (such as DRAM, SRAM, SDRAM, flash memory, programmable read-only memory), and disks and / or optical disks may also be used. In some embodiments, the memory 1110 may include a readable and / or writable removable storage device, such as a laser disc (CD), a read-only digital versatile disc (such as a DVD-ROM, a double-layer DVD-ROM), a read-only Blu-ray disc, an ultra-density optical disc, a flash memory card (such as an SD card, a mini SD card, a Micro-SD card, etc.), a magnetic floppy disk, etc. The computer-readable storage medium does not include carrier waves and transient electronic signals transmitted wirelessly or wired.

[0171] The memory 1110 stores executable codes, and when the executable codes are processed by the processor 1120 , the processor 1120 can execute part or all of the methods described above.

[0172] In addition, the method according to the present application may also be implemented as a computer program or a computer program product, which includes computer program code instructions for executing some or all of the steps in the above method of the present application.

[0173] Alternatively, the present application can also be implemented as a computer-readable storage medium (or non-temporary machine-readable storage medium or machine-readable storage medium) on which executable code (or computer program or computer instruction code) is stored. When the executable code (or computer program or computer instruction code) is executed by the vehicle's processor, the processor executes part or all of the steps of the above-mentioned method according to the present application.

[0174] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A vehicle charging control method, characterized in that: The vehicle includes a power battery and a motor system, and the method includes: When a charging instruction is received, controlling an external charging device to charge the motor system and the power battery; When it is detected that the motor system has completed charging, the motor system is controlled to charge the power battery.

2. The method according to claim 1, characterized in that The vehicle further includes a motor controller system, the motor controller system includes N-phase bridge arms, the motor system includes N inductors, the N-phase bridge arms are respectively connected to the N inductors, N is a positive integer, any one of the N-phase bridge arms is a first bridge arm, and the first bridge arm includes a first switch tube and a second switch tube connected in series; When receiving a charging instruction, controlling an external charging device to charge the motor system and the power battery comprises: When a charging instruction is received, establishing a connection between the vehicle and an external charging device; The first switch tube is controlled to be turned on and the second switch tube is controlled to be turned off, so as to transmit the input current of the external charging device to the first inductor connected to the first bridge arm, and then the input current is boosted by the first inductor to charge the power battery.

3. The method according to claim 2, characterized in that When it is detected that the motor system has been fully charged, controlling the motor system to charge the power battery comprises: When it is detected that charging of the motor system is completed, disconnecting the vehicle from the external charging device; The second switch tube is controlled to be turned on and the first switch tube is controlled to be turned off, so as to transmit the current stored in the first inductor to the power battery.

4. The method according to claim 3, characterized in that The motor controller system includes a first motor controller and a second motor controller connected in parallel to each other, and the motor system includes a first motor and a second motor connected in parallel to each other; The first motor controller includes M-phase bridge arms, the first motor includes M inductors, the M-phase bridge arms are respectively connected to the M inductors, M is a positive integer, any one of the M-phase bridge arms is a second bridge arm, and the second bridge arm includes a third switch tube and a fourth switch tube connected in series; The second motor controller includes a P-phase bridge arm, the second motor includes P inductors, the P-phase bridge arms are respectively connected to the P inductors, P is a positive integer, and N=P+M, wherein any one of the P-phase bridge arms is a third bridge arm, and the third bridge arm includes a fifth switch tube and a sixth switch tube connected in series; The controlling the first switch tube to be turned on and the second switch tube to be turned off to transmit the input current of the external charging device to the first inductor connected to the first bridge arm, and then charging the power battery after boosting the input current through the first inductor, includes: Respectively detecting whether the first motor and the second motor meet preset current rising conditions; If neither the first motor nor the second motor meets the preset current boosting condition, the third switch tube and the fifth switch tube are controlled to be turned on, and the fourth switch tube and the sixth switch tube are turned off, so as to transmit the input current of the external charging device to the second inductor connected to the second bridge arm and the third inductor connected to the third bridge arm respectively, and then the input current is boosted through the second inductor and the third inductor to charge the power battery.

5. The method according to claim 4, characterized in that The method further comprises: If the first motor meets the preset current boost condition, the third switch tube is controlled to be turned on and the fourth switch tube is controlled to be turned off, so as to transmit the input current of the external charging device to the second inductor connected to the second bridge arm, and then the input current is boosted through the second inductor to charge the power battery.

6. The method according to claim 4, characterized in that The method further comprises: If the second motor meets the preset current boost condition, the fifth switch tube is controlled to be turned on and the sixth switch tube is turned off to transmit the input current of the external charging device to the third inductor connected to the third bridge arm, and then the input current is boosted by the third inductor to charge the power battery.

7. The method according to claim 4, characterized in that The controlling the second switch tube to be turned on and the first switch tube to be turned off so as to transmit the current stored in the first inductor to the power battery includes: The fourth switch tube and the sixth switch tube are controlled to be turned on, and the third switch tube and the fifth switch tube are turned off, so as to transmit the current stored in the second inductor and the third inductor to the power battery.

8. The method according to claim 5, characterized in that The controlling the second switch tube to be turned on and the first switch tube to be turned off so as to transmit the current stored in the first inductor to the power battery includes: The fourth switch tube is controlled to be turned on and the third switch tube is controlled to be turned off, so as to transmit the current stored in the second inductor to the power battery.

9. The method according to claim 6, characterized in that The controlling the second switch tube to be turned on and the first switch tube to be turned off so as to transmit the current stored in the first inductor to the power battery includes: The sixth switch tube is controlled to be turned on and the fifth switch tube is controlled to be turned off, so as to transmit the current stored in the third inductor to the power battery.

10. The method according to claim 1, characterized in that The completion of charging of the motor system is detected by: Calculating the series voltage between the power battery and the motor system; If the series voltage reaches the maximum voltage of the external charging device, it is detected that the motor system is fully charged.

11. A vehicle charging control device, characterized in that: The vehicle includes a power battery and a motor system, and the device includes: A first charging control module, configured to control an external charging device to charge the motor system and the power battery when a charging instruction is received; The second charging control module is used to control the motor system to charge the power battery when it is detected that the motor system has been charged.

12. A vehicle, characterized in that: include: processor; as well as A memory having executable codes stored thereon, which, when executed by the processor, causes the processor to execute the method according to any one of claims 1 to 10.

13. A computer-readable storage medium having executable codes stored thereon, which, when executed by a processor of a vehicle, causes the processor to execute the method according to any one of claims 1 to 10.

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