Charging system, charging control method, electronic device, electric energy device and medium

Abstract

Disclosed is an electric energy device, comprising a charging system and an electronic device. Also disclosed are a charging control method and a computer-readable storage medium. The charging system comprises a motor driving circuit and a motor. The motor driving circuit comprises multi-phase bridge arms, the multi-phase bridge arms being connected in parallel; each phase bridge arm is connected to two ends, i.e., positive and negative electrodes, of a battery, and a first end of each phase bridge arm is further connected to a first end of a charging port. The motor comprises multi-phase windings, first ends of the multi-phase windings being correspondingly connected to midpoints of the multi-phase bridge arms, second ends of the multi-phase windings being connected together to form a neutral point, and the neutral point being connected to a second end of the charging port. The motor driving circuit is configured to adjust the on-off states of power devices in each phase bridge arm on the basis of current charging parameters.

Description

Charging systems, charging control methods, electronic devices, electrical energy devices and media

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent application filed on January 24, 2025, with application number 202510121200.0, entitled "Charging System, Charging Control Method, Electronic Device, Power Equipment and Medium", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of charging technology, and in particular to a charging system, charging control method, electronic device, power device and medium. Background Technology

[0004] With the continuous development of new energy technologies, users expect a faster and more efficient charging experience, making it imperative to improve charging speed.

[0005] In existing technologies, methods to reduce system losses and improve charging efficiency by switching the number of phases connected during charging usually require additional switching hardware, which is costly.

[0006] Public content

[0007] This disclosure aims to at least address one of the technical problems existing in the prior art. To this end, one object of this disclosure is to provide a charging system that can control the number of phases of the motor participating in charging by controlling the number of windings in operation, thereby achieving switching of charging modes without the need for additional switching hardware, and at low cost.

[0008] The second objective of this disclosure is to propose a charging control method.

[0009] The third objective of this disclosure is to provide an electronic device.

[0010] The fourth objective of this disclosure is to provide an electrical power device.

[0011] The fifth objective of this disclosure is to provide a non-transitory computer-readable storage medium.

[0012] To address the aforementioned problems, a first aspect of this disclosure provides a charging system comprising: a motor drive circuit including multi-phase bridge arms connected in parallel, each phase of the bridge arm being connected to the positive and negative terminals of a battery, and a first end of each phase of the bridge arm being connected to a first end of a charging port; and a motor including multi-phase windings, the first end of the multi-phase windings being connected to the midpoint of each phase of the bridge arm, the second ends of the multi-phase windings being connected to form a neutral pole, the neutral pole being connected to a second end of the charging port; the motor drive circuit is configured to adjust the on / off state of the power devices in each phase of the bridge arm according to current charging parameters.

[0013] According to the charging system of this disclosure embodiment, the charging circuit is composed of a motor drive circuit and a motor. The motor drive circuit adjusts the on / off state of the power devices in each phase bridge arm according to the current charging parameters to control the corresponding number of windings to participate in charging. By controlling the on / off state of the power devices in each phase bridge arm, the number of phases participating in charging is controlled, thereby realizing the switching of charging modes. This achieves the effect that the charging system can adaptively select the corresponding high-efficiency charging mode under all operating conditions.

[0014] In some embodiments, the current charging parameters include at least one of the output voltage of the charging pile and the current charging power.

[0015] In some embodiments, the current charging parameters are used to determine a target charging mode, and the on / off state of the power devices in the multiphase bridge arm is an on / off state that matches the target charging mode. The charging mode includes a first charging mode and / or a second charging mode. In the first charging mode, the charging pile uses at least one phase winding of the motor to boost charge the battery. In the second charging mode, the charging pile directly charges the battery.

[0016] In some embodiments, the charging system includes a motor, and the first charging mode includes a first boost charging sub-mode, in which the charging pile uses any phase winding of the motor to boost charge the battery.

[0017] In some embodiments, the charging system includes a motor, and the first charging mode includes a first boost charging sub-mode, in which the charging pile uses the first winding of the motor to boost the charging voltage of the battery; wherein the first winding is the winding of the motor that is closest to the current rotor position.

[0018] In some embodiments, the charging system includes a motor, and the first charging mode includes a second boost charging sub-mode, in which the charging pile uses the multiphase windings of the motor to boost the battery.

[0019] In some embodiments, the charging system includes multiple motors and multiple motor drive circuits, with each motor and motor drive circuit connected in a one-to-one correspondence; the multiple motor drive circuits are connected to the positive and negative terminals of the battery in parallel, with the first end of each phase of the bridge arm of the multiple motor drive circuits being shared, and the neutral pole of the multiple motors being shared.

[0020] In some embodiments, the first charging mode includes a first boost charging sub-mode, in which the charging pile uses any phase winding of each motor to boost charge the battery.

[0021] In some embodiments, the first charging mode includes a first boost charging sub-mode, in which the charging pile uses the first winding of each motor to boost charge the battery; wherein the first winding is the winding of the motor that is closest to the current rotor position.

[0022] In some embodiments, the first charging mode includes a second boost charging sub-mode, in which the charging pile uses the multiphase winding of any motor to boost charge the battery.

[0023] In some embodiments, in the first boost charging mode, the power devices of the multiphase bridge arm are in a first on / off state, the first on / off state including the lower bridge arm power devices of the target bridge arm connected to any phase winding of the motor operating alternately between on and off.

[0024] In some embodiments, in the first boost charging mode, the power devices of the multiphase bridge arm are in a second on / off state, the second on / off state including the lower bridge arm power devices of the target bridge arm connected to the first winding operating alternately between on and off.

[0025] In some embodiments, in the second boost charging mode, the power devices of the multiphase bridge arm are in a third on / off state, the third on / off state including the lower bridge arm power devices of each of the plurality of target bridge arms connected to the multiphase winding of the motor operating alternately between on and off.

[0026] In some embodiments, in the first boost charging mode, the power devices of the multiphase bridge arm are in a fourth on / off state, the fourth on / off state including the lower bridge arm power devices of the target bridge arm connected to any phase winding of each of the motors operating alternately between on and off.

[0027] In some embodiments, in the first boost charging mode, the power devices of the multiphase bridge arm are in a fifth on / off state, the fifth on / off state including the lower bridge arm power devices of the target bridge arm connected to the first winding of each motor operating alternately between on and off.

[0028] In some embodiments, in the second boost charging mode, the power devices in the multiphase bridge arm are in a sixth on / off state, which includes the lower bridge arm power devices of each of the plurality of target bridge arms connected to the multiphase winding of any motor operating alternately between on and off.

[0029] In some embodiments, the charging system further includes: a first capacitor, a first end of which is connected to a first end of the charging port, and a second end of which is connected to a second end of the charging port.

[0030] In some embodiments, the charging system further includes: a first switch, a first end of which is connected to a first end of the first capacitor and a first end of each phase of the bridge arm, a second end of which is connected to a first end of the charging port, the first switch being configured to close in a charging state; and / or a second switch, a first end of which is connected to the neutral pole, a second end of which is connected to a second end of the charging port and a second end of the first capacitor, the second switch being configured to close in a charging state.

[0031] In some embodiments, the charging system further includes: a positive main contactor disposed on the connection line between the first end of each phase bridge arm and the first end of the battery, for closing in the charging state; and a negative main contactor disposed on the connection line between the second end of each phase bridge arm and the second end of the battery, for closing in the charging state.

[0032] In some embodiments, the charging system further includes: a second capacitor, a first terminal of which is connected to a first terminal of each phase bridge arm and the positive main contactor, and a second terminal of which is connected to a second terminal of each phase bridge arm and the negative main contactor.

[0033] In some embodiments, the charging system further includes a controller connected to the motor drive circuit, the controller being used to acquire current charging parameters and adjust the on / off state of the power devices in each phase arm according to the current charging parameters.

[0034] A second aspect of this disclosure provides a charging control method for the charging system described in the above embodiments. The method includes: acquiring current charging parameters; and adjusting the on / off state of power devices in each phase arm according to the current charging parameters.

[0035] According to the charging control method of this disclosure, the on / off state of the power devices in each phase bridge arm is controlled by the current charging parameters, thereby controlling the number of phases in which the motor participates in charging and realizing the switching of charging modes. When the charging efficiency is low, the corresponding charging mode is selected according to different operating conditions, so as to achieve the effect that the charging system can adaptively select the corresponding high-efficiency charging mode under all operating conditions.

[0036] In some embodiments, the current charging parameters include at least one of the output voltage of the charging pile and the current charging power.

[0037] In some embodiments, the charging system includes a first charging mode and / or a second charging mode, adjusting the on / off state of the power devices in each phase arm according to the current charging parameters, including: determining a target charging mode according to the current charging parameters; and adjusting the on / off state of the power devices in each phase arm according to the target charging mode; wherein, in the first charging mode, the charging pile charges the battery using at least one phase winding of the motor; and in the second charging mode, the charging pile directly charges the battery.

[0038] In some embodiments, the charging system includes a motor, and the first charging mode includes a first boost charging sub-mode, in which the charging pile uses any phase winding of the motor to boost charge the battery.

[0039] In some embodiments, the charging system includes a motor, and the first charging mode includes a first boost charging sub-mode, in which the charging pile uses the first winding of the motor to boost the charging voltage of the battery; wherein the first winding is the winding of the motor that is closest to the current rotor position.

[0040] In some embodiments, the charging system includes a motor, and the first charging mode includes a second boost charging sub-mode, in which the charging pile uses the multiphase windings of the motor to boost the battery.

[0041] In some embodiments, the charging system includes a plurality of motors, and the first charging mode includes a first boost charging sub-mode, in which the charging pile uses any phase winding of each motor to boost charge the battery.

[0042] In some embodiments, the charging system includes multiple motors, and the first charging mode includes a first boost charging sub-mode, in which the charging pile uses a second winding to boost charge the battery; wherein the second winding includes the winding of each motor that is closest to the current rotor position.

[0043] In some embodiments, the charging system includes multiple motors, and the first charging mode includes a second boost charging sub-mode. In the second boost charging sub-mode, the charging pile uses the multiphase winding of any motor to boost charge the battery.

[0044] A third aspect of this disclosure provides an electronic device, comprising: at least one processor; a memory communicatively connected to the at least one processor; the memory storing a computer program executable by the at least one processor, wherein the at least one processor executes the computer program to implement the charging control method of the above embodiments.

[0045] According to the electronic device of the present disclosure, the processor executes the computer program stored in the memory to implement the charging control method of the above embodiment. The on / off state of the power device in each phase bridge arm is controlled by the current charging parameters, thereby controlling the number of phases of the motor participating in charging and realizing the switching of charging mode. When the charging efficiency is low, the corresponding charging mode is selected according to different working conditions, so as to achieve the effect that the charging system can adaptively select the corresponding high-efficiency charging mode under all working conditions.

[0046] The fourth aspect of this disclosure provides an electrical device, characterized in that it includes a battery, a charging port, an electronic device described in the above embodiments, and a charging system described in the above embodiments, wherein the charging system is connected to the battery and the charging port, and the electronic device is connected to the charging system.

[0047] According to the embodiments of the present disclosure, the power device is based on an architecture of battery, charging port, electronic device and charging system. During battery charging, the on / off state of power devices in each phase bridge arm is controlled by the current charging parameters, thereby controlling the number of phases of the motor participating in charging and realizing the switching of charging mode. When the charging efficiency is low, the corresponding charging mode is selected according to different working conditions, so as to achieve the effect that the charging system can adaptively select the corresponding high-efficiency charging mode under all working conditions.

[0048] A fourth aspect of this disclosure provides a non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that the computer program, when executed, implements the charging control method of the above embodiments.

[0049] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0050] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0051] Figure 1 is a circuit diagram of a charging system according to an embodiment of the present disclosure;

[0052] Figure 2 is a circuit diagram of a charging system according to another embodiment of the present disclosure;

[0053] Figure 3 is a block diagram of a charging system according to an embodiment of the present disclosure;

[0054] Figure 4 is a flowchart of a charging control method according to an embodiment of the present disclosure;

[0055] Figure 5 is a flowchart of a charging control method according to another embodiment of the present disclosure;

[0056] Figure 6 is a flowchart of a charging control method according to another embodiment of the present disclosure;

[0057] Figure 7 is a structural block diagram of an electronic device according to an embodiment of the present disclosure;

[0058] Figure 8 is a structural block diagram of an electrical power device according to an embodiment of the present disclosure.

[0059] Reference numerals: Electrical equipment 100; Charging system 10; Battery 20; Charging port 30; Electronic equipment 40; Motor drive circuit 1; Motor 2; Controller 3; Processor 4; Memory 5; First capacitor C1; Second capacitor C2; First switch K1; Second switch K2; Positive main contactor K+ and negative main contactor K-; First power device VT1; Second power device; VT2; Third power device VT3; Fourth power device VT4; Seventh power device VT7; Eighth power device VT8; Ninth power device VT9; Tenth power device VT10; Eleventh power device VT11; Twelfth power device VT12; Winding LA; Winding LB; Winding LC; Winding LU; Winding LV; Winding LW. Detailed Implementation

[0060] The embodiments of this disclosure are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary.

[0061] In the prior art, a charging control circuit compatible with single-phase and three-phase AC power can switch between three-phase charging and single-phase charging functions. However, this method uses two switch groups to switch between the two phases, requiring additional switching hardware and increasing costs. Another boost charging method determines the charging mode by detecting the output voltage of the charging port, but this method cannot guarantee the highest charging efficiency. Yet another method and device for single-phase charging port phase selection control requires an additional phase switching unit to switch to a specific target phase sequence to provide single-phase charging access. This method requires additional hardware and cannot arbitrarily select the phase sequence, resulting in poor adaptability.

[0062] To address the aforementioned issues, the first aspect of this disclosure proposes a charging system 10. This charging system 10 can control the number of windings in operation, thereby controlling the number of phases of the motor 2 participating in charging, enabling the switching of charging modes, and achieving the effect of adaptively selecting the appropriate high-efficiency charging method under all operating conditions.

[0063] The charging system 10 according to an embodiment of the present disclosure is described below with reference to FIG1. ​​FIG1 is a schematic diagram of a charging system 10 according to an embodiment of the present disclosure. The charging system 10 includes a motor drive circuit 1 and a motor 2.

[0064] The motor drive circuit 1 includes a multi-phase bridge arm connected in parallel. Each phase bridge arm is connected to the positive and negative terminals of the battery 20, and the first end of each phase bridge arm is also connected to the first end of the charging port 30. The motor 2 includes a multi-phase winding. The first end of the multi-phase winding is connected to the midpoint of the multi-phase bridge arm, and the second end of the multi-phase winding is connected to form a neutral pole, which is connected to the second end of the charging port 30. The motor drive circuit 1 is configured to adjust the on / off state of the power devices in each phase bridge arm according to the current charging parameters.

[0065] It should be noted that the number of phases of motor 2 can be three-phase, five-phase, or six-phase, etc., and no specific limitation is made here. The number of parallel-connected bridge arms of motor drive circuit 1 is configured according to the number of phases of motor 2.

[0066] Specifically, during the charging process, the charging efficiency may change due to different operating conditions. To avoid low charging efficiency, the charging system 10 obtains the current charging parameters to understand the charging status under the current operating conditions and adjusts the on / off state of the power devices in each phase arm based on the current charging parameters. If the power device in a certain phase arm is turned off, the corresponding winding of that phase arm is also turned off, i.e., charging is stopped. Thus, when the current charging efficiency is determined to be low based on the current charging parameters, the motor drive circuit 1 controls the corresponding number of windings to be turned on to control the number of windings participating in the operation. By switching the number of charging phases, the charging mode is switched, so that the charging system can adaptively select the appropriate high-efficiency charging mode under all operating conditions.

[0067] After the charging gun of the charging pile is connected to the charging port 30, the motor drive circuit 1 determines, based on the charging parameters, that the current output voltage of the charging pile is lower than the required voltage of the battery 20, which will result in low charging efficiency. In this case, the battery 20 should be charged by DC boost. The motor drive circuit 1 controls the on / off state of the power devices in each phase arm to connect the multi-phase windings in the circuit, increasing the inductance in the circuit, reducing current ripple, and reducing losses. Alternatively, if the V2H (Vehicle-to-Home) charging scheme is used, the charging efficiency is low when charging at low power. Since the power of this scheme is within the low power charging range, the motor drive circuit 1 determines, based on the charging parameters, that the charging system 10 is charging at low power and therefore has low charging efficiency. The motor drive circuit 1 controls the on / off state of the power devices in each phase arm to switch the number of charging phases, thereby reducing the number of windings involved in operation. The fewer the number of windings involved in operation, the larger the inductance value, and the lower the current ripple and losses, thus solving the problem of low charging efficiency of the charging system 10 at low power without increasing hardware costs. The charging parameters include information such as voltage, current, and charging power, which are not specifically limited here.

[0068] According to the charging system 10 of this disclosure embodiment, the charging circuit is composed of a motor drive circuit 1 and a motor 2. The motor drive circuit 1 adjusts the on / off state of the power devices in each phase arm according to the current charging parameters to control the corresponding number of windings to participate in charging. By controlling the on / off state of the power devices in each phase arm, the number of phases participating in charging is controlled, thereby realizing the switching of charging modes. This achieves the effect that the charging system 10 can adaptively select the corresponding high-efficiency charging mode under all operating conditions.

[0069] In some embodiments, the current charging parameters include at least one of the output voltage of the charging station and the current charging power.

[0070] Specifically, after acquiring the charging parameters, the motor drive circuit 1 determines whether it is necessary to switch the number of charging phases to improve charging efficiency by using the current charging power. It compares the charging power during normal charging with the current charging power to determine whether it is necessary to boost the output voltage of the charging pile. Alternatively, it determines whether it is necessary to switch the number of charging phases to improve charging efficiency by using the output voltage of the charging pile. It compares the output voltage of the charging pile with the charging voltage of the battery 20 to determine whether it is necessary to boost the output voltage of the charging pile. In order to select a suitable target charging mode, the circuit controls the on / off state of the power devices in each phase arm according to the requirements of the target charging mode.

[0071] Since the boost charging method is inefficient when connected to a low-power charging pile, the charging power of the current charging pile must be determined first, and then the output voltage of the current charging pile must be determined.

[0072] In some embodiments, the current charging parameters are used to determine the target charging mode, and the on / off state of the power devices in the multi-phase bridge arm is an on / off state that matches the target charging mode. The charging mode includes a first charging mode and / or a second charging mode. In the first charging mode, the charging pile uses at least one phase winding of the motor to boost charge the battery; in the second charging mode, the charging pile directly charges the battery.

[0073] Specifically, the motor drive circuit 1 determines, based on the charging parameters, that the current output voltage of the charging pile is lower than the required voltage of the battery 20, which will lead to low charging efficiency. In this case, the battery 20 should be charged by DC boost. The motor drive circuit 1 controls the on / off state of the power devices in each phase arm to match the on / off state of the first charging mode, so that the multi-phase winding is connected to the circuit, thereby increasing the inductance in the circuit, reducing current ripple, and reducing losses. Alternatively, the motor drive circuit 1 determines, based on the charging parameters, that the current output voltage of the charging pile is not lower than the required voltage of the battery 20, and the charging rate is normal, so there is no need for boost charging. In this case, the motor drive circuit 1 controls the on / off state of the power devices in each phase arm to match the on / off state of the second charging mode. In the second charging mode, the charging pile directly charges the battery 20 without boost operation, ensuring the charging rate while reducing the losses caused by boost operation.

[0074] In some embodiments, referring to Figure 2, each phase arm of the motor includes two half-bridges, namely an upper half-bridge and a lower half-bridge, wherein each half-bridge includes a power device and a diode. Based on this, during boost charging of the battery 20, i.e., in the first charging mode, two processes are included: First, an energy storage process is performed, where the charging pile current flows through the windings involved in charging, the power device of the lower half-bridge corresponding to the windings involved in charging, and then into the negative terminal of the charging pile, storing electrical energy in the windings involved in charging; then, a charging process is performed, where the charging pile current flows through the windings involved in charging, the upper half-bridge corresponding to the windings involved in charging, the positive terminal of the battery, the negative terminal of the battery, and then into the negative terminal of the charging pile, thereby charging the battery with the energy stored in the windings and the charging pile. Thus, by alternating between the above two processes throughout the first charging mode, boost charging of the battery is achieved.

[0075] Referring to Figure 2, when charging the battery 20, the power devices of the upper bridge arm corresponding to the winding participating in the charging can be selectively controlled to be turned on or off. Specifically, the power devices of the upper bridge arm corresponding to the winding participating in the charging can be controlled to be turned off, so that the charging pile current can flow into the negative terminal of the charging pile after passing through the winding participating in the charging, the diode of the upper bridge arm corresponding to the winding participating in the charging, the positive terminal of the battery, and the negative terminal of the battery; or, the power devices of the upper bridge arm corresponding to the winding participating in the charging can be controlled to be turned on, so that the charging pile current can flow into the negative terminal of the charging pile after passing through the winding participating in the charging, the power devices of the upper bridge arm corresponding to the winding participating in the charging, the positive terminal of the battery, and the negative terminal of the battery.

[0076] In some embodiments, the charging system includes a motor 2, and the first charging mode includes a first boost charging sub-mode, in which the charging pile uses any phase winding of the motor 2 to boost charge the battery.

[0077] Specifically, as shown in Figure 2, the charging system 10 includes a motor 21, which includes windings LA, LB, and LC. When boost charging is required, the winding participating in the charging in the charging system is the target winding. Under the same charging power condition, the inductance value is the largest at this time, so the current ripple is reduced and the loss is also reduced. The charging efficiency can be increased without adding additional hardware. The target winding can be any phase winding of LA, LB, or LC in the motor 21. Thus, in the first boost charging sub-mode, the charging pile can use any phase winding of the motor to boost charge the battery.

[0078] In some embodiments, the charging system 10 includes a motor 21, and the first charging mode includes a first boost charging sub-mode. In the first boost charging sub-mode, the charging pile uses the first winding of the motor to boost the battery, wherein the first winding is the winding of the motor that is closest to the current rotor position.

[0079] Specifically, as shown in Figure 2, the charging system 10 includes a motor 21. When boost charging is required, in order to avoid the phenomenon of rotor gear tooth knocking and torque output when the winding is connected to the charging circuit, this application selects the first winding closest to the current position of the rotor as the target winding. Thus, when the on / off state of the power device in the multi-phase bridge arm is controlled to match the on / off state of the first boost charging sub-mode, no torque fluctuation will be generated, solving the problem of micro-noise such as gear noise.

[0080] In some embodiments, the charging system 10 includes a motor 2, and the first charging mode includes a second boost charging sub-mode. In the second boost charging sub-mode, the charging pile uses the multiphase windings of the motor 2 to boost charge the battery 20.

[0081] Specifically, when the battery 20 is being charged, the charging rate is low when the state of charge (SOC) of the battery 20 is low or about to be saturated. In order to improve the charging rate, the motor drive circuit 1 controls the on / off state of the power devices in the multi-phase bridge arm to match the on / off state of the second boost charging sub-mode. At this time, the charging loss has a smaller impact on the charging efficiency under high power charging, thereby using the multi-phase winding to improve the current carrying capacity of the charging circuit and increasing the charging rate by increasing the current.

[0082] In some embodiments, the charging system 10 includes a plurality of motors 2 and a plurality of motor drive circuits 1, with each motor 2 and motor drive circuit 1 connected in a one-to-one correspondence; the plurality of motor drive circuits 1 are connected to the positive and negative terminals of the battery 20 in parallel, the first end of each phase bridge arm of the plurality of motor drive circuits 1 is shared, and the neutral pole of the plurality of motors 2 is shared.

[0083] Specifically, as shown in Figure 1, taking two motors 2 as an example, there are two corresponding motor drive circuits 1. Motor 2 includes motor 21 and motor 22, and motor drive circuit 1 includes motor drive circuit 11 and motor drive circuit 12.

[0084] Taking motors 21 and 22 as three-phase motors as examples, motor 21 includes windings LA, LB, and LC; motor 22 includes windings LU, LV, and LW; the first phase bridge arm includes a first power device VT1 and a second power device VT2; the second phase bridge arm includes a third power device VT3 and a fourth power device VT4; the third phase bridge arm includes a fifth power device VT5 and a sixth power device VT6; the fourth phase bridge arm includes a seventh power device VT7 and an eighth power device VT8; the fifth phase bridge arm includes a ninth power device VT9 and a tenth power device VT10; and the sixth phase bridge arm includes an eleventh power device VT11 and a twelfth power device VT12. The midpoint A of the first phase bridge arm is connected to the first end of winding LA; the midpoint B of the second phase bridge arm is connected to the first end of winding LB; the midpoint C of the third phase bridge arm is connected to the first end of winding LC; the midpoint U of the fourth phase bridge arm is connected to the first end of winding LU; the midpoint V of the fifth phase bridge arm is connected to the first end of winding V; and the midpoint W of the sixth phase bridge arm is connected to the first end of winding LW.

[0085] In some embodiments, the first charging mode includes a first boost charging sub-mode, in which the charging pile uses any phase winding of each motor 2 to boost charge the battery 20.

[0086] Specifically, the charging system 10 includes two motors 2. In the first boost charging sub-mode, the charging pile can use any one phase winding of motor 21 (LA, LB, LC) and any one phase winding of motor 22 (LU, LV, LW) as the target winding to achieve boost charging of battery 20. Therefore, connecting n windings to the charging circuit of battery 20 can increase the inductance in the connection circuit, reduce the current ripple during charging, and increase the carrier frequency can also reduce system losses and current ripple, comprehensively improving system efficiency during charging. The increased carrier frequency needs to be determined based on electromagnetic compatibility (EMC) and motor conditions, selecting a frequency point with higher efficiency and less impact on other modules.

[0087] In some embodiments, the first charging mode includes a first boost charging sub-mode, in which the charging pile uses the first winding of each motor to boost the battery; wherein, the first winding is the winding of motor 2 that is closest to the current rotor position.

[0088] Specifically, the charging system 10 includes two motors, as shown in Figure 1. The current rotor positions of motors 21 and 22 are obtained, and the first winding closest to the rotor of each motor is selected as the target winding. Thus, when the on / off state of the power device in the phase bridge arm corresponding to the target winding is controlled to match the on / off state of the first boost charging mode, torque fluctuation will not occur, thus solving the problem of micro-noise such as gear noise.

[0089] In some embodiments, the first charging mode includes a second boost charging sub-mode, in which the charging pile uses the multiphase winding of any motor to boost charge the battery 20.

[0090] Specifically, when battery 20 is being charged, the charging rate is low when the state of charge (SOC) of battery 20 is low or about to be saturated. To increase the charging rate, the multiphase windings of any motor are used to boost the voltage of battery 20. As shown in Figure 1, the charging system 10 includes two motors. In the second boost charging sub-mode, the charging pile can use the multiphase windings of motor 21 to boost the voltage of battery 20, or the charging pile can use the multiphase windings of motor 22 to boost the voltage of battery 20. In this second boost charging sub-mode, the multiphase windings of the motors participating in the charging can be all or part of the windings of motor 2. For example, if motor 2 includes three-phase windings, the charging pile can use the three-phase windings of motor 21 to boost the voltage of battery 20, or the charging pile can use two-phase windings of motor 21 to boost the voltage of battery 20. There are no restrictions on this.

[0091] In some embodiments, in the first boost charging sub-mode, the power devices of the multi-phase bridge arm are in a first on / off state. The first on / off state includes the lower bridge arm power devices of the target bridge arm connected to any phase winding of the motor 2 operating alternately between on and off, thereby realizing the energy storage charging of any phase winding of the motor 2 by controlling the on and off of the power devices in the lower bridge arm.

[0092] It should be understood that in this application, the alternating conduction of the upper and lower bridge arms is achieved by controlling the on and off of the power devices of the lower bridge arm, thereby realizing boost charging. As for the conduction of the upper bridge arm mentioned in this article, it can be achieved by using a diode of the upper bridge arm, or by turning on the power devices of the upper bridge arm; there is no limitation on this.

[0093] In some embodiments, the first on / off state includes the lower bridge arm power device of the target bridge arm connected to any phase winding of the motor 2 operating alternately between on and off, while the power devices of the other bridge arms besides the target bridge arm are in the off state; wherein, during energy storage charging, the lower bridge arm power device of the target bridge arm operates at a first switching frequency, and during boost charging, the upper bridge arm of the target bridge arm is on, wherein the upper bridge arm power device is a power device connected to the positive terminal of the battery 20, and the lower bridge arm power device is a power device connected to the negative terminal of the battery 20.

[0094] Specifically, taking the energy storage charging of any phase winding as the LA winding as an example, during the energy storage process, as shown in Figure 2, the lower bridge arm of the target bridge arm connected to the LA winding is turned on, that is, the power device VT2 is turned on, while other power devices are not turned on. The current flows back to the negative terminal of the charging pile through the charging port 30, K2, the LA winding, the power device VT2, and K1, completing the energy storage process. During the boost discharge process, the upper bridge arm of the target bridge arm of the LA winding is turned on. The current flows back to the negative terminal of the charging pile through the charging port 30, K2, the LA winding, the diode connected in parallel with the power device VT1, the positive main contactor K+, the battery 20, the negative main contactor K-, and K1, completing one boost charging operation for the battery 20. The first switching frequency is related to the current in the circuit and can be adjusted and controlled based on actual conditions or preset based on actual needs; there are no restrictions on this.

[0095] In some embodiments, in the first boost charging sub-mode, the power devices of the multi-phase bridge arm are in a second on / off state. The second on / off state includes the lower bridge arm power devices of the target bridge arm connected to the first winding operating alternately between on and off, thereby charging any phase winding of the motor 2. Thus, the energy storage charging of the first winding is achieved by controlling the on and off of the power devices in the lower bridge arm.

[0096] In some embodiments, the second on / off state includes the lower bridge arm power device of the target bridge arm connected to the first winding operating alternately between on and off, while the power devices of the bridge arms other than the target bridge arm are in the off state; wherein, during energy storage charging, the lower bridge arm power device of the target bridge arm operates at a third switching frequency, and during boost charging, the upper bridge arm of the target bridge arm is on, wherein the upper bridge arm power device is a power device connected to the positive terminal of the battery 20, and the lower bridge arm power device is a power device connected to the negative terminal of the battery 20.

[0097] Specifically, taking the energy storage and charging of the first winding, the LA winding, as an example, during the energy storage process, as shown in Figure 2, the lower bridge arm of the target bridge arm connected to the LA winding is turned on, that is, the power device VT2 is turned on, while other power devices are not turned on. The current flows back to the negative terminal of the charging pile through the charging port, K2, the LA winding, the power device VT2, and K1, completing the energy storage process. During the boost discharge process, the upper bridge arm of the target bridge arm of the LA winding is turned on. The current flows back to the negative terminal of the charging pile through the charging port 30, K2, the LA winding, the diode connected in parallel with the power device VT1, the positive main contactor K+, the battery 20, the negative main contactor K-, and K1, completing one boost charging operation for the battery 20. The third switching frequency is related to the current in the circuit and can be adjusted and controlled based on actual conditions or preset based on actual needs; there are no restrictions on this.

[0098] In some embodiments, in the second boost charging sub-mode, the power devices of the multiphase bridge arm are in a third on / off state. The third on / off state includes the lower bridge arm power devices of each of the multiple target bridge arms connected to the multiphase winding of the motor 2 operating alternately between on and off, thereby realizing the energy storage charging of the multiphase winding by controlling the on and off of the power devices in the lower bridge arm.

[0099] In some embodiments, the third on / off state includes the lower bridge arm power devices of each of the plurality of target bridge arms connected to the multiphase winding of the motor 2 operating alternately between on and off, while the power devices of the bridge arms other than the target bridge arms are in the off state; wherein, during energy storage charging, the lower bridge arm power devices of each target bridge arm operate at a fifth switching frequency, and during boost charging, the upper bridge arm of each target bridge arm is on, wherein the upper bridge arm power devices are power devices connected to the positive terminal of the battery 20, and the lower bridge arm power devices are power devices connected to the negative terminal of the battery 20.

[0100] Specifically, taking a three-phase winding as an example, in the second boost charging mode, during the energy storage process, as shown in Figure 2, the lower bridge arm of the three target bridge arms connected by the three-phase winding is turned on, that is, power devices VT2, VT4, and VT6 are turned on, while other power devices are not turned on. The current flows through the charging port 30 and K2 and then into the LA winding, LB winding, and LC winding. Then, it flows back to the negative terminal of the charging pile from K1 after passing through power devices VT2, VT4, and VT6, respectively, completing the energy storage process. During the boost discharge process, the upper bridge arm of the three target bridge arms of the three-phase winding is turned on. The current flows through the charging port and K2 and then into the LA winding, LB winding, and LC winding. Then, it flows back to the negative terminal of the charging pile from the diodes connected in parallel with power devices VT1, VT3, and VT5, respectively, after passing through the diodes connected in parallel with power devices VT1, VT3, and VT5, respectively, through the positive main contactor K+, battery 20, negative main contactor K-, and K1, completing one boost charging operation for battery 20. Among them, the fifth switching frequency is related to the current in the circuit. It can be adjusted and controlled based on the actual situation or preset based on actual needs, and there are no restrictions on this.

[0101] In some embodiments, in the first boost charging sub-mode, the power devices of the multi-phase bridge arm are in a fourth on / off state. The fourth on / off state includes the lower bridge arm power devices of the target bridge arm connected to any phase winding of each motor operating alternately between on and off, thereby realizing the energy storage charging of any phase winding of each motor 2 by controlling the on and off of the power devices in the lower bridge arm.

[0102] In some embodiments, the fourth on / off state includes the lower bridge arm power device of the target bridge arm connected to any phase winding of each motor 2 operating alternately between on and off, while the power devices of the other bridge arms besides the target bridge arm are in the off state; wherein, during energy storage charging, the lower bridge arm power device of the target bridge arm operates at a seventh switching frequency, and during boost charging, the upper bridge arm of the target bridge arm is on, wherein the upper bridge arm power device is a power device connected to the positive terminal of the battery 20, and the lower bridge arm power device is a power device connected to the negative terminal of the battery 20.

[0103] Specifically, referring to Figure 1, taking the charging system 10 including motor 21 and motor 22 as an example, where any phase winding selected in motor 21 is LA and any phase winding selected in motor 22 is LU for energy storage charging, during the energy storage process, the lower bridge arm in the target bridge arm connected to the LA winding is turned on, and the lower bridge arm in the target bridge arm connected to the LU winding is turned on, that is, power devices VT2 and VT8 are turned on, while other power devices are not turned on. The current is shunted into the LA winding and LU winding after passing through charging port 30 and K2, and then flows through power device VT2 respectively. After VT8, the current flows back to the negative terminal of the charging pile from K1, completing the energy storage process. During the boost discharge process, the upper bridge arm of the target bridge arm connected to the LA winding and the upper bridge arm of the target bridge arm connected to the LU winding are turned on. The current flows through charging port 30 and K2 and then into the LA winding and LU winding. After passing through the diode connected in parallel with power device VT1 and the diode connected in parallel with power device VT7, the current flows back to the negative terminal of the charging pile from the positive main contactor K+, battery 20, negative main contactor K-, and K1, completing one boost charging operation for battery 20. The seventh switching frequency is related to the current in the circuit and can be adjusted and controlled based on actual conditions or preset based on actual needs; there are no restrictions on this.

[0104] In some embodiments, in the first boost charging sub-mode, the power devices of the multi-phase bridge arm are in a fifth on / off state. The fifth on / off state includes the lower bridge arm power devices of the target bridge arm connected to the first winding of each motor 2 operating alternately between on and off, thereby realizing the energy storage charging of the first winding of each motor 2 by controlling the on and off of the power devices in the lower bridge arm.

[0105] In some embodiments, the fifth on / off state includes the lower bridge arm power device of the target bridge arm connected to the first winding of each motor 2 operating alternately between on and off, while the power devices of the other bridge arms besides the target bridge arm are all in the off state; wherein, during energy storage charging, the lower bridge arm power device of the target bridge arm operates at the ninth switching frequency, and during boost charging, the upper bridge arm of the target bridge arm is on, wherein the upper bridge arm power device is a power device connected to the positive terminal of the battery 20, and the lower bridge arm power device is a power device connected to the negative terminal of the battery 20.

[0106] Specifically, referring to Figure 1, taking the charging system 10 including motor 21 and motor 22, with the first winding of motor 21 being LA and the first winding of motor 22 being LU for energy storage charging as an example, during the energy storage process, the lower bridge arm of the target bridge arm connected to the LA winding is turned on, and the lower bridge arm of the target bridge arm connected to the LU winding is turned on, that is, power devices VT2 and VT8 are turned on, while other power devices are not turned on. The current is shunted into the LA winding and LU winding after passing through charging port 30 and K2, and then flows through power devices VT2 and VT8 respectively. After T8, the current flows back to the negative terminal of the charging pile from K1, completing the energy storage process. During the boost discharge process, the upper bridge arm of the target bridge arm connected to the LA winding and the upper bridge arm of the target bridge arm connected to the LU winding are turned on. The current flows through charging port 30 and K2 and then into the LA winding and LU winding. It then flows back to the negative terminal of the charging pile from the positive main contactor K+, battery 20, negative main contactor K-, and K1 after passing through the diode connected in parallel with power device VT1 and the diode connected in parallel with power device VT7, completing one boost charging operation for battery 20. The ninth switching frequency is related to the current in the circuit and can be adjusted and controlled based on actual conditions or preset based on actual needs; there are no restrictions on this.

[0107] In some embodiments, in the second boost charging mode, the power devices in the multiphase bridge arm are in the sixth on / off state. The sixth on / off state includes the lower bridge arm power devices of each of the multiple target bridge arms connected to the multiphase winding of any motor 2 operating alternately between on and off, thereby realizing the energy storage charging of the multiphase winding by controlling the on and off of the power devices in the lower bridge arm.

[0108] In actual use, any motor 2 can be the motor 2 inserted into the charging gun side, and then the multi-phase winding of the motor 2 can be used for energy storage and charging. That is, if the charging gun on the motor 21 side is inserted for charging, the multi-phase winding of the motor 21 is selected for energy storage and charging; if the charging gun on the motor 22 side is inserted for charging, the multi-phase winding of the motor 22 is selected for energy storage and charging.

[0109] In some embodiments, the sixth on / off state includes the lower bridge arm power devices of each of the plurality of target bridge arms connected to the multiphase winding of any motor 2 operating alternately between on and off, while the power devices of the bridge arms other than the target bridge arms are in the off state; wherein, during energy storage charging, the lower bridge arm power devices of the target bridge arms operate at an eleventh switching frequency, and during boost charging, the upper bridge arm of the target bridge arms is on, wherein the upper bridge arm power devices are power devices connected to the positive terminal of the battery, and the lower bridge arm power devices are power devices connected to the negative terminal of the battery.

[0110] Specifically, as shown in Figure 2, taking any motor 2 as motor 21 and the multi-phase winding as three-phase winding as an example, in the second boost charging mode, during the energy storage process, the lower bridge arm of the three target bridge arms connected by the three-phase winding is turned on, that is, power devices VT2, VT4 and VT6 are turned on, while other power devices are not turned on. The current flows through charging port 30 and K2 and then into the LA winding, LB winding and LC winding, and then flows back to the negative terminal of the charging pile from K1 through power devices VT2, VT4 and VT6 respectively. The energy storage process is completed. During the boost discharge process, the upper bridge arm of the three target bridge arms of the three-phase winding is turned on. The current flows through charging port 30 and K2 and then into the LA winding, LB winding, and LC winding. It then flows back to the negative terminal of the charging pile through the diodes connected in parallel with power devices VT1, VT3, and VT5, respectively, via the positive main contactor K+, battery 20, and the negative main contactors K- and K1, completing one boost charging operation for battery 20. The eleventh switching frequency is related to the current in the circuit and can be adjusted or preset based on actual conditions; there are no restrictions on this.

[0111] In some embodiments, in the second charging mode, the upper bridge arm of each phase bridge arm is turned on, and the lower bridge arm power devices of each phase bridge arm are turned off, and the charging pile directly charges the battery. The upper bridge arm power device is a power device connected to the positive terminal of the battery 20.

[0112] Specifically, as shown in Figure 2, the charging system 10 includes a motor 21. In the second charging mode, the upper arm of each phase bridge arm is turned on, and the power devices VT2, VT4 and VT6 are turned off. The current flows through the charging port 30 and K2 and then into the LA winding, LB winding and LC winding. After passing through the diode of the upper arm of each phase bridge arm, the current flows back to the negative terminal of the charging pile from the positive main contactor K+, the battery 20, the negative main contactor K- and K1, thus completing the direct charging operation of the battery 20.

[0113] If the charging system 10 includes multiple motors 2, as shown in Figure 1, the charging system 10 includes motors 21 and 22. In the second charging mode, the upper arm of each phase bridge arm is turned on, and the power devices VT2, VT4, VT6, VT8, VT10, and VT12 are turned off. The current flows through the charging port 30 and K2 and then into the LA winding, LB winding, LC winding, LU winding, LV winding, and LW winding. Then, it flows through the diodes of the upper arm of each phase bridge arm and back to the negative terminal of the charging pile from the positive main contactor K+, the battery 20, the negative main contactor K-, and K1, completing the direct charging operation of the battery 20. This process does not require energy storage charging operation.

[0114] In some embodiments, as shown in FIG1, the charging system 10 includes a first capacitor C1.

[0115] The first end of the first capacitor C1 is connected to the first end of the charging port 30, and the second end of the first capacitor C1 is connected to the second end of the charging port 30.

[0116] Specifically, the first capacitor C1 can also store energy. The charging pile can charge the first capacitor C1, and through the combined action of the first capacitor C1 and the winding, the battery 20 is boosted and charged. That is, the motor controller determines the charging mode by recognizing the current charging parameters, and controls the on / off state of the power devices, so that the first capacitor C1 and the inductor can store and release energy, allowing the energy to flow to the battery and realizing the boost charging function. When the charging pile is charging, the second switch K2 should be closed first, and the battery 20 charges the first capacitor. This ensures that the voltage of the first capacitor C1 matches the voltage of the charging pile, achieving a handshake between the charging pile and the charging port 30. It also avoids excessive voltage difference between the charging pile and the first capacitor C1 after the first switch K1 is closed, which could cause voltage surges and reduce unnecessary component damage.

[0117] In some embodiments, the charging system 10 further includes a first switch K1 and / or a second switch K2.

[0118] Wherein, the first end of the first switch K1 is connected to the first end of the first capacitor C1 and the first end of each phase bridge arm, and the second end of the first switch K1 is connected to the first end of the charging port 30. The first switch K1 is used to close in the charging state; the first end of the second switch K2 is connected to the neutral pole, and the second end of the second switch K2 is connected to the second end of the charging port 30 and the second end of the first capacitor C1. The second switch K2 is used to close in the charging state.

[0119] In some embodiments, as shown in FIG1, the charging system 10 includes a positive main contactor K+ and a negative main contactor K-.

[0120] The positive main contactor K+ is located on the connection line between the first end of each phase bridge arm and the first end of the battery 20, and is used to close in the charging state; the negative main contactor K- is located on the connection line between the second end of each phase bridge arm and the second end of the battery 20, and is used to close in the charging state.

[0121] Specifically, battery 20 is connected to motor drive circuit 1 through positive main contactor K+ and negative main contactor K-. When battery 20 is being charged, positive main contactor K+ and negative main contactor K- need to be closed. When charging battery 20, the charging operation of battery 20 is completed by closing the first switch K1, the second switch K2, the positive main contactor K+ and the negative main contactor K-, and controlling the on / off state of the power devices in each phase bridge arm.

[0122] In some embodiments, as shown in FIG1, the charging system 10 further includes a second capacitor C2.

[0123] The first end of the second capacitor C2 is connected to the first end of each phase bridge arm and the positive main contactor K+, and the second end of the second capacitor C2 is connected to the second end of each phase bridge arm and the negative main contactor K-.

[0124] Specifically, the second capacitor C2 is connected between the battery 20 and the motor drive circuit 1. The second capacitor C2 can stabilize the voltage of the battery 20 when the battery 20 is charging, and prevent excessive voltage difference during charging from causing an impact.

[0125] In some embodiments, as shown in FIG3, the charging system 10 further includes a controller 3.

[0126] The controller 3 is connected to the motor drive circuit 2. The controller 3 is used to obtain the current charging parameters and adjust the on / off state of the power devices in each phase arm according to the current charging parameters.

[0127] A second aspect of this disclosure provides a charging control method, as shown in FIG4, which includes steps S1-S2.

[0128] Step S1: Obtain the current charging parameters.

[0129] Specifically, the controller obtains various signals sent when the charging pile and battery are connected through the motor drive circuit, thereby obtaining current vehicle information and charging pile information. The current vehicle information may include vehicle operating condition information and vehicle environment information, while the charging pile information may include charging pile output voltage and output current, etc. No specific restrictions are imposed here.

[0130] Step S2: Adjust the on / off state of the power devices in each phase arm according to the current charging parameters.

[0131] Specifically, after acquiring the current charging parameters, the controller can determine the charging mode to be used based on the current charging parameters, thereby controlling the on / off state of the power devices in each phase arm to switch the charging mode and ensure that a high-efficiency charging mode is always used.

[0132] According to the charging control method of this disclosure, the on / off state of the power devices in each phase bridge arm is controlled by the current charging parameters, thereby controlling the number of phases of the motor participating in charging and realizing the switching of charging modes. At the same time, by controlling the on / off state of the power devices, the number of phases connected to the charging circuit is changed, increasing the circuit inductance and reducing the current ripple. When the charging efficiency is low, the corresponding charging mode can be selected according to different operating conditions, so as to achieve the effect that the charging system can adaptively select the corresponding high-efficiency charging mode under all operating conditions.

[0133] In some embodiments, the charging system includes a first charging mode and / or a second charging mode, adjusting the on / off state of the power devices in each phase arm according to the current charging parameters, including determining a target charging mode according to the current charging parameters; adjusting the on / off state of the power devices in each phase arm according to the target charging mode; wherein, in the first charging mode, the charging pile charges the battery using at least one phase winding of the motor; in the second charging mode, the charging pile directly charges the battery.

[0134] Specifically, the controller acquires the charging pile's output voltage and current charging power. Based on the current charging power, it determines whether switching the number of charging phases is necessary to improve charging efficiency. Furthermore, by comparing the charging pile's output voltage with the battery's charging voltage, it determines whether a boost operation of the charging pile's output voltage is needed to select the appropriate target charging mode. This allows the controller to adjust the on / off state of the power devices in each phase arm according to the requirements of the target charging mode. Thus, by selecting different charging modes based on the current charging parameters and changing the carrier frequency, the iron loss of the entire electric drive system can be reduced, improving the efficiency of low-power boost charging and enabling high-efficiency charging to cover all charging conditions.

[0135] For example, taking a motor with N-phase windings as an example, if it is determined that the current charging pile output voltage is lower than the preset charging voltage of the charging system, then the target charging mode is determined to be the first charging mode, i.e., boost charging. The first charging mode can ensure the charging speed of the battery. If it is determined that the output voltage is higher than the preset charging voltage, and the carrier frequency and connection circuit do not change, then the target charging mode is determined to be the second charging mode, i.e., normal direct charging is performed, reducing boost operation and thus reducing losses. The preset charging voltage can be set according to the actual situation, and no specific restrictions are made here.

[0136] Specifically, when a vehicle is charging, two charging conditions are first checked: "plugging in" and "charging permission signal." If the vehicle is not plugged in or does not receive a charging permission signal, the charging process cannot continue. When both conditions are met, the charging process continues. Because the second boost charging sub-mode, such as three-phase boost charging, is inefficient when connected to low-power charging piles, the current charging power of the charging pile is first checked to see if it is lower than a preset charging power threshold. If the current charging power is lower than the preset threshold, the output voltage of the charging pile is checked. If the output voltage is lower than the vehicle's charging voltage, the more efficient first boost charging sub-mode, i.e., the n-phase boost charging mode, is used; otherwise, the second charging mode, i.e., the direct-connect charging mode, is used. Even when the current charging power is higher than the preset threshold, the charging pile's output voltage is checked. If the output voltage is lower than the vehicle's charging voltage, the more efficient three-phase boost charging mode is used; otherwise, the direct-connect charging mode is used. Therefore, the above charging method makes up for the poor efficiency of boost charging when the charging power is low, realizes the switching of multi-phase charging mode without increasing hardware cost, improves the compatibility of charging mode, and achieves efficient charging covering all charging conditions.

[0137] In some embodiments, the charging system includes a motor, and the first charging mode includes a first boost charging sub-mode, in which the charging pile uses any phase winding of the motor to boost charge the battery.

[0138] In some embodiments, the charging system includes a motor, and the first charging mode includes a first boost charging sub-mode, in which the charging pile uses the first winding of the motor to boost the charging of the battery; wherein the first winding is the winding of the motor that is closest to the current rotor position.

[0139] In some embodiments, the charging system includes a motor, and the first charging mode includes a second boost charging sub-mode, in which the charging pile uses the multiphase windings of the motor to boost the battery.

[0140] In some embodiments, the charging system includes multiple motors, and the first charging mode includes a first boost charging sub-mode, in which the charging pile uses any phase winding of each motor to boost charge the battery.

[0141] In some embodiments, the charging system includes multiple motors, and the first charging mode includes a first boost charging sub-mode, in which the charging pile uses the first winding of each motor to boost charge the battery; wherein, the first winding is the winding of the motor that is closest to the current rotor position.

[0142] In some embodiments, the charging system includes multiple motors, and the first charging mode includes a second boost charging sub-mode, in which the charging pile uses the multiphase windings of any motor to boost charge the battery.

[0143] The charging control method of this disclosure embodiment is described below with reference to Figures 5 and 6. The specific steps are as follows, and Figure 4 includes steps S3-S14.

[0144] Step S3, Begin

[0145] Step S4: Determine if the charging gun is inserted. If yes, proceed to step S5; otherwise, proceed to step S14.

[0146] Step S5: Determine if there is a charging need. If yes, proceed to step S6; otherwise, proceed to step S14.

[0147] Step S6: Determine whether the current charging power is lower than the preset charging power threshold. If yes, proceed to step S7; otherwise, proceed to step S8.

[0148] Step S7: Determine whether the output voltage is lower than the preset charging voltage. If yes, proceed to step S9; otherwise, proceed to step S10.

[0149] Step S8: Determine whether the output voltage is lower than the preset charging voltage. If yes, proceed to step S11; otherwise, proceed to step S10.

[0150] Step S9: The target charging mode is the first boost charging sub-mode. Then, proceed to step S12.

[0151] Step S10: The target charging mode is the second charging mode. Then proceed to step S12.

[0152] Step S11: The target charging mode is the second boost charging sub-mode. Then proceed to step S12.

[0153] Step S12: Start charging.

[0154] Step S13, charging complete.

[0155] Step S14, End.

[0156] The process of the first charging mode of this embodiment of the present disclosure is described below with reference to FIG5. The specific steps are as follows, FIG5 includes steps S15-S23.

[0157] Step S15, Begin.

[0158] Step S16: Charge the first capacitor C1 so that the voltage of the first capacitor is equal to the voltage of the charging pile, so as to avoid large voltage difference during connection and damage to the device.

[0159] Step S17: Determine the current rotor position of the motor.

[0160] Step S18: Determine the winding closest to the rotor based on the current rotor position and increase the carrier frequency.

[0161] Step S19: Change the on / off state of the power device.

[0162] In step S20, the charging pile charges the windings and the first capacitor C1 that are involved in the charging process.

[0163] Step S21: Change the on / off state of the power device.

[0164] In step S22, since the inductor current has the characteristic that it cannot change abruptly, energy can flow into the battery terminal through the windings involved in charging and the first capacitor C1 to charge the battery.

[0165] Step S23, charging complete.

[0166] A third aspect of this disclosure provides an electronic device 40, as shown in FIG7, which includes at least one processor 4 and at least one memory 5 communicatively connected to the processor.

[0167] The memory 5 stores a computer program that can be executed by at least one processor 4. When the at least one processor 4 executes the computer program, it implements the charging control method of the above embodiment.

[0168] According to the embodiments of the present disclosure, the electronic device 40 executes the computer program stored in the memory 5 through the processor 4 to implement the charging control method of the above embodiments. By controlling the on / off state of the power devices in each phase bridge arm through the current charging parameters, the number of phases of the motor 2 participating in charging is controlled, and the charging mode is switched. When the charging efficiency is low, the corresponding charging mode is selected according to different working conditions, so as to achieve the effect that the charging system 10 can adaptively select the corresponding high-efficiency charging mode under all working conditions.

[0169] The fourth aspect of this disclosure provides an electrical device 100, as shown in FIG8, including a battery 20, a charging port 30, an electronic device 40, and a charging system 10.

[0170] The charging system 10 is connected to the battery 20 and the charging port 30, and the electronic device 40 is connected to the charging system 10.

[0171] According to the embodiments of the present disclosure, the power device 100 is based on the architecture of battery 20, charging port 30, electronic device 40 and charging system 10. During the charging process of battery 20, the on / off state of power devices in each phase bridge arm is controlled by the current charging parameters, thereby controlling the number of phases of motor 2 participating in charging and realizing the switching of charging mode. When the charging efficiency is low, the corresponding charging mode is selected according to different working conditions, so as to achieve the effect that the charging system can adaptively select the corresponding high-efficiency charging mode under all working conditions.

[0172] The fifth aspect of this disclosure provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed, implements the charging control method of the above embodiments.

[0173] In the description of this specification, any process or method described in the flowcharts or otherwise herein may be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order according to the functions involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0174] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from or in conjunction with such an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by or in conjunction with an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which programs can be printed, because programs can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0175] It should be understood that various parts of this disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0176] Those skilled in the art will understand that all or part of the steps of the methods described in the above embodiments can be implemented by a program instructing related hardware, and the program can be stored in a computer-readable storage medium. When executed, the program includes one or a combination of the steps of the method embodiments.

[0177] Furthermore, the functional units in the various embodiments of this disclosure can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0178] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure.

[0179] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0180] Although embodiments of this disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A charging system (10), characterized in that, include: The motor drive circuit (1) includes a multi-phase bridge arm connected in parallel. Each phase of the bridge arm is connected to the positive and negative terminals of the battery (20), and the first end of each phase of the bridge arm is also connected to the first end of the charging port (30). The motor (2) includes a multiphase winding, the first end of the multiphase winding is connected to the midpoint of the multiphase bridge arm, the second end of the multiphase winding is connected to form a neutral pole, and the neutral pole is connected to the second end of the charging port (30). The motor drive circuit (1) is configured to adjust the on / off state of the power devices in each phase arm according to the current charging parameters.

2. The charging system (10) according to claim 1, characterized in that, The current charging parameters include at least one of the charging pile's output voltage and the current charging power.

3. The charging system (10) according to claim 1 or 2, characterized in that, The current charging parameters are used to determine the target charging mode. The on / off state of the power devices in the multiphase bridge arm is the on / off state that matches the target charging mode. The charging mode includes a first charging mode and / or a second charging mode. In the first charging mode, the charging pile uses at least one phase winding of the motor (2) to boost the voltage of the battery (20); In the second charging mode, the charging pile directly charges the battery (20).

4. The charging system (10) according to claim 3, characterized in that, The charging system (10) includes a motor (2), and the first charging mode includes a first boost charging sub-mode. In the first boost charging sub-mode, the charging pile uses any phase winding of the motor (2) to boost charge the battery (20).

5. The charging system (10) according to claim 3, characterized in that, The charging system (10) includes a motor (2), and the first charging mode includes a first boost charging sub-mode. In the first boost charging sub-mode, the charging pile uses the first winding of the motor (2) to boost charge the battery (20). The first winding is the winding of the motor (2) that is closest to the current rotor position.

6. The charging system (10) according to claim 3, characterized in that, The charging system (10) includes a motor (2), and the first charging mode includes a second boost charging sub-mode. In the second boost charging sub-mode, the charging pile uses the multi-phase winding of the motor (2) to boost charge the battery (20).

7. The charging system (10) according to claim 3, characterized in that, The charging system (10) includes multiple motors (2) and multiple motor drive circuits (1), with each motor (2) and each motor drive circuit (1) connected in a one-to-one correspondence. The plurality of motor drive circuits (1) are connected to the positive and negative terminals of the battery (20) in parallel. The first end of each phase of the bridge arm in the plurality of motor drive circuits (1) is connected together, and the neutral poles of the plurality of motors (2) are connected together.

8. The charging system (10) according to claim 7, characterized in that, The first charging mode includes a first boost charging sub-mode, in which the charging pile uses any phase winding of each motor (2) to boost charge the battery (20).

9. The charging system (10) according to claim 7, characterized in that, The first charging mode includes a first boost charging sub-mode, in which the charging pile uses the first winding of each motor (2) to boost charge the battery (20); The first winding is the winding of the motor (2) that is closest to the current rotor position.

10. The charging system (10) according to claim 7, characterized in that, The first charging mode includes a second boost charging sub-mode, in which the charging pile uses the multiphase winding of any motor (2) to boost the charging of the battery (20).

11. The charging system (10) according to claim 4, characterized in that, In the first boost charging mode, the power devices of the multi-phase bridge arm are in a first on / off state, which includes the lower bridge arm power devices of the target bridge arm connected to any phase winding of the motor (2) alternating between on and off.

12. The charging system (10) according to claim 5, characterized in that, In the first boost charging mode, the power devices of the multiphase bridge arm are in a second on / off state, which includes the lower bridge arm power devices of the target bridge arm connected to the first winding alternating between being on and off.

13. The charging system (10) according to claim 6, characterized in that, In the second boost charging mode, the power devices of the multiphase bridge arm are in a third on / off state, which includes the lower bridge arm power devices of each of the multiple target bridge arms connected to the multiphase winding of the motor (2) alternating between on and off.

14. The charging system (10) according to claim 8, characterized in that, In the first boost charging mode, the power devices of the multi-phase bridge arm are in a fourth on / off state, which includes the lower bridge arm power devices of the target bridge arm connected to any phase winding of each of the motors (2) alternating between on and off.

15. The charging system (10) according to claim 9, characterized in that, In the first boost charging mode, the power devices of the multiphase bridge arm are in the fifth on / off state, which includes the lower bridge arm power devices of the target bridge arm connected to the first winding of each motor (2) alternating between on and off.

16. The charging system (10) according to claim 10, characterized in that, In the second boost charging mode, the power devices in the multiphase bridge arm are in the sixth on / off state. The sixth on / off state includes the lower bridge arm power devices of each of the multiple target bridge arms connected to the multiphase winding of any motor (2) alternating between on and off.

17. The charging system (10) according to any one of claims 1-16, characterized in that, The charging system (10) also includes: A first capacitor (C1) is connected at its first end to the first end of the charging port (30), and at its second end to the second end of the charging port (30).

18. The charging system (10) according to claim 17, characterized in that, The charging system (10) also includes: A first switch (K1) is configured such that its first end is connected to the first end of the first capacitor (C1) and the first end of each phase arm of the bridge, and its second end is connected to the first end of the charging port (30). The first switch (K1) is used to close in the charging state; and / or The second switch (K2) has its first end connected to the neutral pole and its second end connected to the second end of the charging port (30) and the second end of the first capacitor (C1). The second switch (K2) is used to close in the charging state.

19. The charging system (10) according to any one of claims 1-18, characterized in that, The charging system (10) also includes: A positive main contactor (K+) is disposed on the connection line between the first end of each phase bridge arm and the first end of the battery (20), for closing in the charging state; and The negative main contactor (K-) is disposed on the connection line between the second end of each phase bridge arm and the second end of the battery (20) for closing in the charging state.

20. The charging system (10) according to claim 19, characterized in that, The charging system (10) also includes: The second capacitor (C2) has its first end connected to the first end of each phase bridge arm and the positive main contactor (K+), and its second end connected to the second end of each phase bridge arm and the negative main contactor (K-).

21. The charging system (10) according to any one of claims 1-20, characterized in that, The charging system (10) also includes: The controller (3) is connected to the motor drive circuit (1). The controller (3) is used to obtain the current charging parameters and adjust the on / off state of the power devices in each phase arm according to the current charging parameters.

22. A charging control method, characterized in that, For a charging system according to any one of claims 1-21, the method comprises: Get the current charging parameters; and Adjust the on / off state of the power devices in each phase arm according to the current charging parameters.

23. The charging control method according to claim 22, characterized in that, The current charging parameters include at least one of the charging pile's output voltage and the current charging power.

24. The charging control method according to claim 22 or 23, characterized in that, The charging system includes a first charging mode and / or a second charging mode, and adjusts the on / off state of the power devices in each phase arm according to the current charging parameters, including: Determine the target charging mode based on the current charging parameters; and Adjust the on / off state of the power devices in each phase arm according to the target charging mode; In the first charging mode, the charging pile uses at least one phase winding of the motor to charge the battery. In the second charging mode, the charging pile directly charges the battery.

25. The charging control method according to claim 24, characterized in that, The charging system includes a motor, and the first charging mode includes a first boost charging sub-mode, in which the charging pile uses any phase winding of the motor to boost the battery; or. The charging system includes a motor, and the first charging mode includes a first boost charging sub-mode. In the first boost charging sub-mode, the charging pile uses the first winding of the motor to boost the voltage of the battery. Wherein, the first winding is the winding in the motor that is closest to the current rotor position; or The charging system includes a motor, and the first charging mode includes a second boost charging sub-mode. In the second boost charging sub-mode, the charging pile utilizes the multi-phase windings of the motor to boost the voltage of the battery; or The charging system includes multiple motors, and the first charging mode includes a first boost charging sub-mode. In the first boost charging sub-mode, the charging pile uses any phase winding of each motor to boost the battery's voltage; or The charging system includes multiple motors, and the first charging mode includes a first boost charging sub-mode. In the first boost charging sub-mode, the charging pile uses the first winding of each motor to boost the voltage of the battery. Wherein, the first winding is the winding in the motor that is closest to the current rotor position; or The charging system includes multiple motors, and the first charging mode includes a second boost charging sub-mode. In the second boost charging sub-mode, the charging pile uses the multiphase winding of any motor to boost the battery.

26. An electronic device (40), characterized in that, include: At least one processor (4); and The memory (5) is communicatively connected to the at least one processor (4); The memory (5) stores a computer program that can be executed by the at least one processor (4), which, when executing the computer program, implements the charging control method according to any one of claims 22-25.

27. An electrical energy device (100), characterized in that, include: Battery (20); Charging port (30); and The charging system (10) according to any one of claims 1-21, wherein the charging system (10) is connected to the battery (20) and the charging port (30); and The electronic device (40) according to claim 26 is connected to the charging system (10).

28. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed, it implements the charging control method according to any one of claims 22-25.

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