Charging control method, charging system, controller and vehicle

Abstract

The invention relates to a charging control method, a charging system, a controller and a vehicle, and relates to the technical field of vehicles, the method comprises the following steps: determining a target charging mode from preset charging modes according to the output voltage of a power supply device and the battery voltage of a power battery, the preset charging mode comprises at least one of a boost charging mode, a buck charging mode and a direct connection charging mode. And according to the target charging mode, controlling a switch assembly and an energy storage module so as to pre-charge a pre-charging capacitor through the power supply device and / or the energy storage module. And under the condition that pre-charging is completed, controlling the switch assembly and the energy storage module according to the target charging mode so as to charge the power battery through the power supply device and / or the energy storage module. According to the charging mode corresponding to the output voltage of the power supply device and the battery voltage of the power battery, the pre-charging capacitor is pre-charged and the power battery is charged, power supply devices with different voltages can be compatible, and the adaptability of the power supply device and the charging flexibility are improved.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular, to a charging control method, a charging system, a controller and a vehicle. Background Art

[0002] With the increase in the number of new energy vehicles, the voltage range of power batteries of different models is getting wider and wider, the power required for charging is also uneven, and the output capacity of charging piles from different manufacturers is different. It is necessary to charge the power battery by boosting or bucking, and before officially charging the power battery, it is necessary to pre-charge the pre-charge capacitor through the capacitor pre-charging circuit to protect the power battery from being damaged by large current. In the related technology, it is necessary to add an additional buck-boost circuit to achieve boost charging or buck charging, and to pre-charge the pre-charge capacitor through the power battery, it is also necessary to add an additional pre-charging branch and corresponding components, resulting in high circuit complexity and increased production costs. Summary of the invention

[0003] In order to solve the problems existing in the related art, the present disclosure provides a charging control method, a charging system, a controller and a vehicle.

[0004] According to a first aspect of an embodiment of the present disclosure, a charging control method is provided, the method comprising:

[0005] Determine a target charging mode from preset charging modes according to the output voltage of the power supply device and the battery voltage of the power battery, wherein the preset charging mode includes: at least one of a boost charging mode, a buck charging mode and a direct charging mode;

[0006] According to the target charging mode, controlling the switch assembly and the energy storage module to pre-charge the pre-charge capacitor through the power supply device and / or the energy storage module;

[0007] When the pre-charging is completed, the switch assembly and the energy storage module are controlled according to the target charging mode to charge the power battery through the power supply device and / or the energy storage module.

[0008] Optionally, the target charging mode includes the boost charging mode; and controlling the switch assembly and the energy storage module according to the target charging mode to pre-charge the pre-charge capacitor through the power supply device and / or the energy storage module includes:

[0009] Controlling the switch assembly and the energy storage module to charge the energy storage module through the power supply device;

[0010] The switch assembly and the energy storage module are controlled to pre-charge the pre-charge capacitor simultaneously through the power supply device and the energy storage module.

[0011] Optionally, controlling the switch assembly and the energy storage module according to the target charging mode to charge the power battery through the power supply device and / or the energy storage module includes:

[0012] Controlling the switch assembly and the energy storage module to charge the energy storage module through the power supply device;

[0013] The switch assembly and the energy storage module are controlled to charge the power battery simultaneously through the power supply device and the energy storage module.

[0014] Optionally, the target charging mode includes the buck charging mode; and controlling the switch assembly and the energy storage module according to the target charging mode to pre-charge the pre-charge capacitor through the power supply device and / or the energy storage module includes:

[0015] Controlling the switch assembly and the energy storage module to charge the energy storage module and / or the pre-charge capacitor through the power supply device;

[0016] The switch assembly and the energy storage module are controlled to pre-charge the pre-charge capacitor through the energy storage module.

[0017] Optionally, controlling the switch assembly and the energy storage module according to the target charging mode to charge the power battery through the power supply device and / or the energy storage module includes:

[0018] Controlling the switch assembly and the energy storage module to charge the energy storage module and / or the power battery through the power supply device;

[0019] The switch assembly and the energy storage module are controlled to charge the power battery through the energy storage module.

[0020] Optionally, the target charging mode includes the direct charging mode; and controlling the switch assembly and the energy storage module according to the target charging mode to pre-charge the pre-charge capacitor through the power supply device and / or the energy storage module includes:

[0021] Controlling the switch assembly and the energy storage module to pre-charge the pre-charge capacitor through the power supply device;

[0022] According to the target charging mode, controlling the switch assembly and the energy storage module to charge the power battery through the power supply device and / or the energy storage module includes:

[0023] According to the direct charging mode, the switch assembly and the energy storage module are controlled to charge the power battery through the power supply device.

[0024] According to a second aspect of an embodiment of the present disclosure, a charging system is provided, the charging system comprising a charging circuit, a power battery and a controller, the charging circuit comprising: a switch component, a pre-charge capacitor and an energy storage module, the switch component comprising a first switch component and a second switch component;

[0025] The power battery is suitable for being connected to the power supply device through the first switch assembly and the second switch assembly, the power battery is also suitable for being connected to one end of the energy storage module through the first switch assembly, the other end of the energy storage module is suitable for being connected to the power supply device through the second switch assembly, the pre-charge capacitor is suitable for being connected in parallel with the power battery through the first switch assembly, and the pre-charge capacitor is also connected to one end of the energy storage module;

[0026] The controller is used to determine a target charging mode from preset charging modes according to the output voltage of the power supply device and the battery voltage of the power battery, wherein the preset charging mode includes at least one of a boost charging mode, a buck charging mode and a direct charging mode;

[0027] According to the target charging mode, controlling the switch assembly and the energy storage module to pre-charge the pre-charge capacitor through the power supply device and / or the energy storage module;

[0028] When the pre-charging is completed, the switch assembly and the energy storage module are controlled according to the target charging mode to charge the power battery through the power supply device and / or the energy storage module.

[0029] Optionally, the charging circuit further includes: a charging port capacitor;

[0030] One end of the charging port capacitor is connected to one end of the energy storage module, and the other end of the charging port capacitor is connected to the other end of the energy storage module.

[0031] Optionally, the energy storage module includes: an inductor and a three-phase inverter circuit;

[0032] The first end of the pre-charge capacitor is connected to the upper bridge arm of the three-phase inverter circuit, the second end of the pre-charge capacitor is connected to the lower bridge arm of the three-phase inverter circuit, the midpoint of the bridge arm of the three-phase inverter circuit is connected to the first end of the inductor, and the second end of the inductor is connected to the second switch component; the upper bridge arm of the three-phase inverter circuit is also connected to the second switch component, and the lower bridge arm of the three-phase inverter circuit is also connected to the second switch component.

[0033] Optionally, the first switch assembly includes: a first switch, a second switch, and a third switch; the second switch assembly includes: a fourth switch, a fifth switch, and a sixth switch;

[0034] The first end of the first switch is suitable for connecting to the first end of the power battery, and the second end of the first switch is connected to the first end of the pre-charge capacitor;

[0035] The first end of the second switch is suitable for connecting to the second end of the power battery, and the second end of the second switch is connected to the second end of the pre-charge capacitor;

[0036] The first end of the third switch is suitable for being connected to the first end of the power battery, and the second end of the third switch is connected to the second end of the inductor;

[0037] The first end of the fourth switch is connected to the upper bridge arm of the three-phase inverter circuit, and the second end of the fourth switch is suitable for being connected to the first end of the power supply device;

[0038] The first end of the fifth switch is connected to the lower bridge arm of the three-phase inverter circuit, and the second end of the fifth switch is suitable for being connected to the second end of the power supply device;

[0039] The first end of the sixth switch is connected to the second end of the inductor, and the second end of the sixth switch is suitable for being connected to the first end of the power supply device.

[0040] Optionally, the controller is specifically used for:

[0041] closing the fifth switch, turning on the sixth switch, and opening the first switch, the second switch, the third switch, and the fourth switch;

[0042] The switch tube of the upper bridge arm and the switch tube of the lower bridge arm of the three-phase inverter circuit are periodically controlled to be alternately turned on, so as to boost and pre-charge the pre-charge capacitor according to the boost charging mode.

[0043] Optionally, the controller is specifically used for:

[0044] closing the first switch, the second switch, the fifth switch, and the sixth switch, and opening the third switch and the fourth switch;

[0045] The upper bridge and the lower bridge of the three-phase inverter circuit are periodically controlled to be alternately turned on, so as to perform boost charging for the power battery according to the boost charging mode.

[0046] Optionally, the controller is specifically used for:

[0047] Closing the fifth switch, turning on the switch tube of the upper bridge arm of the three-phase inverter circuit, and turning off the first switch, the second switch, the third switch, the fourth switch and the switch tube of the lower bridge arm of the three-phase inverter circuit;

[0048] The sixth switch is periodically turned on to perform buck pre-charging for the pre-charge capacitor according to the buck charging mode.

[0049] Optionally, the controller is specifically used for:

[0050] closing the second switch, the third switch, the fourth switch and the fifth switch, and opening the first switch and the sixth switch;

[0051] The switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit are periodically controlled to be alternately turned on, so as to perform buck charging for the power battery according to the buck charging mode.

[0052] Optionally, the controller is specifically used for:

[0053] Closing the fifth switch, and opening the first switch, the second switch, the third switch, the sixth switch, and the switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit;

[0054] The fourth switch is periodically turned on to perform direct pre-charging for the pre-charge capacitor according to the direct charging mode.

[0055] Optionally, the controller is specifically used for:

[0056] Closing the first switch, the second switch and the fifth switch, and opening the third switch, the sixth switch and the switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit;

[0057] The fourth switch is periodically turned on, and after the output voltage of the power supply device is maintained in a preset voltage interval, the fourth switch is kept turned on to directly charge the power battery according to the direct charging mode.

[0058] According to a third aspect of an embodiment of the present disclosure, a controller is provided, including:

[0059] a memory having a computer program stored thereon;

[0060] A processor is used to execute the computer program in the memory to implement the steps of the method described in the first aspect of the embodiment of the present disclosure.

[0061] According to a fourth aspect of an embodiment of the present disclosure, a vehicle is provided, wherein the vehicle includes the controller described in the third aspect of an embodiment of the present disclosure, or the charging system described in the second aspect of an embodiment of the present disclosure.

[0062] Through the above technical solution, the present disclosure first determines the target charging mode from the preset charging mode according to the output voltage of the power supply device and the battery voltage of the power battery, wherein the preset charging mode includes at least one of a boost charging mode, a buck charging mode and a direct charging mode. Then, according to the target charging mode, the switch assembly and the energy storage module are controlled to pre-charge the pre-charge capacitor through the power supply device and / or the energy storage module, and when the pre-charging is completed, the switch assembly and the energy storage module are controlled according to the target charging mode to charge the power battery through the power supply device and / or the energy storage module. The present disclosure reuses the original energy storage module of the vehicle, pre-charges the pre-charge capacitor according to the target charging mode and charges the power battery, and can be compatible with power supply devices of different voltages without adding additional circuit structures, and pre-charges the pre-charge capacitor through the power supply device without adding additional pre-charging branches, thereby simplifying the circuit structure and reducing production costs.

[0063] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0065] Figure 1 is a flow chart of a charging control method according to an exemplary embodiment;

[0066] Figure 2 is a flow chart showing another charging control method according to an exemplary embodiment;

[0067] Figure 3 is a flow chart showing another charging control method according to an exemplary embodiment;

[0068] Figure 4 is a flow chart showing another charging control method according to an exemplary embodiment;

[0069] Figure 5 is a flow chart of another charging control method according to an exemplary embodiment;

[0070] Figure 6 is a block diagram of a charging system according to an exemplary embodiment;

[0071] Figure 7 is a block diagram of another charging system according to an exemplary embodiment;

[0072] Figure 8 is a block diagram of another charging system according to an exemplary embodiment;

[0073] Fig. 9 is a block diagram of another charging system according to an exemplary embodiment;

[0074] Fig.10 is a schematic diagram showing a charging control according to an exemplary embodiment;

[0075] Fig.11 is a schematic diagram showing another charging control according to an exemplary embodiment;

[0076] Fig.12 is a schematic diagram showing another charging control according to an exemplary embodiment;

[0077] Fig.13 is a schematic diagram showing another charging control according to an exemplary embodiment;

[0078] Fig.14 is a schematic diagram showing another charging control according to an exemplary embodiment;

[0079] Fig.15 is a schematic diagram showing another charging control according to an exemplary embodiment;

[0080] Fig.16 is a schematic diagram showing another charging control according to an exemplary embodiment;

[0081] Fig.17 is a schematic diagram showing another charging control according to an exemplary embodiment;

[0082] Fig.18 is a schematic diagram showing another charging control according to an exemplary embodiment;

[0083] Fig.19 is a schematic diagram showing another charging control according to an exemplary embodiment;

[0084] Fig. 20 is a block diagram of a controller according to an exemplary embodiment;

[0085] Fig.21 is a block diagram of a vehicle according to an exemplary embodiment;

[0086] Fig. 22 is a block diagram of another vehicle according to an exemplary embodiment.

[0087] Description of Reference Numerals

[0088] Charging system 200; charging circuit 201; controller 202; energy storage module 2011; switch component 2012; pre-charge capacitor 2013; first switch component 2012a; second switch component 2012b; charging port capacitor 2015; inductor 2011a; three-phase inverter circuit 2011b; first switch K1; second switch K2; third switch K3; fourth switch K4; fifth switch K5; sixth switch K6; power battery 300; power supply device 400; vehicle 500. DETAILED DESCRIPTION

[0089] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0090] Figure 1 is a flow chart of a charging control method according to an exemplary embodiment. Figure 1 As shown, the method includes:

[0091] Step S101 : determining a target charging mode from preset charging modes according to the output voltage of the power supply device and the battery voltage of the power battery.

[0092] For example, the power supply device in the present disclosure can be a charging pile, or a DC power supply, such as a battery, and the present disclosure does not specifically limit this. The present disclosure can be applied to a charging circuit, wherein the charging circuit can include a pre-charge capacitor, a power battery, a switch assembly and an energy storage module, and the pre-charge capacitor and the power battery can be connected in parallel. The energy storage module can include any energy storage element capable of storing electrical energy, and a corresponding control switch. The energy storage module can include, for example, a three-phase inverter circuit and an inductor, wherein the three-phase inverter circuit can be a three-phase inverter circuit in a motor controller, and the inductor can be an inductor in a motor, thereby realizing functional reuse of the motor controller and the motor module, simplifying the circuit structure, and reducing production costs.

[0093] Since the output voltage of the power supply device and the battery voltage of the power battery are not necessarily matched, after the power supply device is connected to the charging circuit, the corresponding target charging mode can be determined from the preset charging modes according to the magnitude relationship between the output voltage of the power supply device and the battery voltage of the power battery. The preset charging mode may include at least one of a boost charging mode, a buck charging mode and a direct charging mode.

[0094] In some embodiments, when the output voltage of the power supply device is less than the battery voltage of the power battery, the boost charging mode can be used as the target charging mode; when the output voltage of the power supply device is greater than the battery voltage of the power battery, and the difference between the output voltage and the battery voltage is greater than a first preset voltage threshold and less than a second preset voltage threshold, the direct charging mode can be used as the target charging mode; when the output voltage of the power supply device is greater than the battery voltage of the power battery, and the difference between the output voltage and the battery voltage is greater than the second preset voltage threshold, the buck charging mode can be used as the target charging mode.

[0095] Step S102, according to the target charging mode, controlling the switch assembly and the energy storage module to pre-charge the pre-charge capacitor through the power supply device and / or the energy storage module.

[0096] For example, different charging modes correspond to different switch states in the charging circuit, wherein the switch state includes the states of various switches in the switch assembly and the states of various switches in the energy storage module. After determining the target charging mode, the states of various switches in the switch assembly and the states of various switches in the energy storage module can be controlled according to the target charging mode, so as to pre-charge the pre-charge capacitor through the power supply device and / or the energy storage module.

[0097] In other embodiments, when the target charging mode is the boost charging mode, the pre-charge capacitor can be pre-charged by the power supply device and the energy storage module together, thereby achieving boost pre-charging of the pre-charge capacitor; when the target charging mode is the buck charging mode, the pre-charge capacitor can be pre-charged by the energy storage module, thereby achieving buck pre-charging of the pre-charge capacitor; when the target charging mode is the direct charging mode, the pre-charge capacitor can be pre-charged by the power supply device, thereby achieving direct pre-charging of the pre-charge capacitor.

[0098] Step S103, when the pre-charging is completed, the switch assembly and the energy storage module are controlled according to the target charging mode to charge the power battery through the power supply device and / or the energy storage module.

[0099] For example, after the pre-charging of the pre-charge capacitor is completed, the states of various switches in the switch assembly and the states of various switches in the energy storage module can be controlled according to the target charging mode, so as to charge the power battery through the power supply device and / or the energy storage module.

[0100] In other embodiments, when the target charging mode is the boost charging mode, the power battery can be charged by the power supply device and the energy storage module together, thereby achieving boost charging of the power battery; when the target charging mode is the buck charging mode, the power battery can be charged by the energy storage module, thereby achieving buck charging of the power battery; when the target charging mode is the direct charging mode, the power battery can be charged by the power supply device, thereby achieving direct charging of the power battery.

[0101] In this way, when the output voltage of the power supply device is less than the charging voltage of the power battery, the power battery can be boosted and charged through the boost charging mode; when the output voltage of the power supply device is greater than the charging voltage of the power battery, the power battery can be bucked and charged through the buck charging mode, so that the power supply device can output as much power as possible, thereby reducing the charging time; when the output voltage of the power supply device meets the charging voltage of the power battery, the power battery can be directly charged through the direct charging mode, so that it can be compatible with power supply devices of different voltages, improving the charging flexibility and the compatibility of the power battery and the power supply device. In addition, by reusing the circuit structure of the vehicle's motor controller and motor, there is no need to add an additional boost or buck circuit structure, and the pre-charge capacitor is pre-charged through the power supply device, without adding an additional pre-charge branch, simplifying the circuit structure and reducing the production cost.

[0102] In summary, the present disclosure first determines the target charging mode from the preset charging modes according to the output voltage of the power supply device and the battery voltage of the power battery, wherein the preset charging mode includes at least one of a boost charging mode, a buck charging mode and a direct charging mode. Then, according to the target charging mode, the switch assembly and the energy storage module are controlled to pre-charge the pre-charge capacitor through the power supply device and / or the energy storage module, and when the pre-charging is completed, the switch assembly and the energy storage module are controlled according to the target charging mode to charge the power battery through the power supply device and / or the energy storage module. The present disclosure reuses the original energy storage module of the vehicle, pre-charges the pre-charge capacitor according to the target charging mode and charges the power battery, and can be compatible with power supply devices of different voltages without adding additional circuit structures, and pre-charges the pre-charge capacitor through the power supply device without adding additional pre-charging branches, thereby simplifying the circuit structure and reducing production costs.

[0103] Figure 2 is a flow chart of another charging control method according to an exemplary embodiment. Figure 2 As shown, the target charging mode may include a boost charging mode. Accordingly, step S102 may be implemented by the following steps:

[0104] Step S1021, controlling the switch assembly and the energy storage module to charge the energy storage module through the power supply device.

[0105] Step S1022, controlling the switch assembly and the energy storage module to pre-charge the pre-charge capacitor simultaneously through the power supply device and the energy storage module.

[0106] For example, when the target charging mode is the boost charging mode, the state of each switch in the switch assembly and the state of each switch in the energy storage module can be controlled according to the boost charging mode, so that the power supply device can charge the energy storage element in the energy storage module through the charging circuit. Then, the state of each switch in the switch assembly and the state of each switch in the energy storage module can be controlled so that the power supply device and the energy storage element in the energy storage module can pre-charge the pre-charge capacitor at the same time, thereby achieving boost pre-charging of the pre-charge capacitor.

[0107] In some embodiments, steps S1021 and S1022 may be repeatedly performed in sequence according to the target frequency to periodically charge the energy storage module, and the pre-charge capacitor may be pre-charged simultaneously through the power supply device and the energy storage module, thereby achieving continuous boost pre-charging of the pre-charge capacitor. The target frequency may be a preset fixed value, or may be calculated in real time during the pre-charging process. For example, the target frequency may be calculated based on a preset pre-charging time, energy storage parameters of the energy storage element, parameters of each switch in the energy storage module, and the actual output voltage of the power supply device. In one possible implementation, the duty cycle of the PWM (English: Pulse Width Modulation, Chinese: Pulse Width Modulation) wave may be determined according to the target frequency, and the PWM wave may be used to control the charging circuit to repeatedly perform steps S1021 and S1022 according to the target frequency.

[0108] Figure 3 is a flow chart of another charging control method according to an exemplary embodiment. Figure 3 As shown, when the target charging mode includes the boost charging mode, correspondingly, step S103 can be implemented by the following steps:

[0109] Step S1031, controlling the switch assembly and the energy storage module to charge the energy storage module through the power supply device.

[0110] Step S1032, controlling the switch assembly and the energy storage module to charge the power battery simultaneously through the power supply device and the energy storage module.

[0111] For example, when the target charging mode is the boost charging mode, the state of each switch in the switch assembly and the state of each switch in the energy storage module can be controlled according to the boost charging mode, so that the power supply device can charge the energy storage element in the energy storage module through the charging circuit. Then, the state of each switch in the switch assembly and the state of each switch in the energy storage module can be controlled, so that the power supply device and the energy storage element in the energy storage module can charge the power battery at the same time, thereby achieving boost charging of the power battery.

[0112] In some embodiments, step S1031 and step S1032 may be repeatedly executed in sequence according to the target frequency to periodically charge the energy storage module, and pre-charge the power battery simultaneously through the power supply device and the energy storage module, thereby achieving continuous boost charging of the power battery.

[0113] Figure 4 is a flow chart of another charging control method according to an exemplary embodiment. Figure 4 As shown, the target charging mode may include a buck charging mode. Accordingly, step S102 may be implemented by the following steps:

[0114] Step S1023, controlling the switch assembly and the energy storage module to charge the energy storage module and / or the pre-charge capacitor through the power supply device.

[0115] Step S1024, controlling the switch assembly and the energy storage module to pre-charge the pre-charge capacitor through the energy storage module.

[0116] For example, when the target charging mode is the buck charging mode, the state of each switch in the switch assembly and the state of each switch in the energy storage module can be controlled according to the buck charging mode, so that the power supply device can charge the energy storage element in the energy storage module through the charging circuit. The state of each switch in the switch assembly and the state of each switch in the energy storage module can also be controlled, so that the power supply device can charge the energy storage element and the pre-charge capacitor in the energy storage module in series through the charging circuit, and the pre-charge of the pre-charge capacitor can be reduced in voltage while charging the energy storage element. Then, the state of each switch in the switch assembly and the state of each switch in the energy storage module can be controlled, so that the energy storage element in the energy storage module charges the pre-charge capacitor, thereby achieving the pre-charge of the pre-charge capacitor at a reduced voltage.

[0117] In some embodiments, step S1023 and step S1024 may be repeatedly performed in sequence according to the target frequency to periodically charge the energy storage module, and pre-charge the pre-charge capacitor through the energy storage module, thereby achieving continuous voltage reduction pre-charging of the pre-charge capacitor.

[0118] Figure 5is a flow chart of another charging control method according to an exemplary embodiment. Figure 5 As shown, when the target charging mode includes the buck charging mode, correspondingly, step S103 can be implemented by the following steps:

[0119] Step S1033, controlling the switch assembly and the energy storage module to charge the energy storage module and / or the power battery through the power supply device.

[0120] Step S1034, controlling the switch assembly and the energy storage module to charge the power battery through the energy storage module.

[0121] For example, when the target charging mode is the buck charging mode, the state of each switch in the switch assembly and the state of each switch in the energy storage module can be controlled according to the buck charging mode, so that the power supply device can charge the energy storage element in the energy storage module through the charging circuit. The state of each switch in the switch assembly and the state of each switch in the energy storage module can also be controlled, so that the power supply device can charge the energy storage element and the power battery in the energy storage module in series through the charging circuit, and the power battery can be charged at a reduced voltage while charging the energy storage element. Then, the state of each switch in the switch assembly and the state of each switch in the energy storage module can be controlled, so that the energy storage element in the energy storage module charges the power battery, thereby realizing the buck charging of the power battery.

[0122] In some embodiments, step S1033 and step S1034 may be repeatedly executed in sequence according to the target frequency to periodically charge the energy storage module, and charge the power battery through the energy storage module, thereby achieving continuous voltage reduction charging of the power battery.

[0123] According to some other embodiments shown in the present disclosure, the target charging mode may include a direct charging mode. According to the target charging mode, step S102 may be implemented in the following manner:

[0124] The switch assembly and the energy storage module are controlled to pre-charge the pre-charge capacitor through the power supply device.

[0125] When the target charging mode includes the direct charging mode, correspondingly, step S103 may be implemented in the following manner:

[0126] Control the switch assembly and the energy storage module to charge the power battery through the power supply device.

[0127] For example, when the target charging mode is the direct charging mode, the state of each switch in the switch assembly and the state of each switch in the energy storage module can be controlled according to the target direct charging mode, so that the pre-charge capacitor can be pre-charged directly through the power supply device.

[0128] After the pre-charging is completed, the state of each switch in the switch assembly and the state of each switch in the energy storage module can be controlled according to the direct charging mode, so as to directly charge the power battery through the power supply device.

[0129] In summary, the present disclosure first determines the target charging mode from the preset charging modes according to the output voltage of the power supply device and the battery voltage of the power battery, wherein the preset charging mode includes at least one of a boost charging mode, a buck charging mode and a direct charging mode. Then, according to the target charging mode, the switch assembly and the energy storage module are controlled to pre-charge the pre-charge capacitor through the power supply device and / or the energy storage module, and when the pre-charging is completed, the switch assembly and the energy storage module are controlled according to the target charging mode to charge the power battery through the power supply device and / or the energy storage module. The present disclosure reuses the original energy storage module of the vehicle, pre-charges the pre-charge capacitor according to the target charging mode and charges the power battery, and can be compatible with power supply devices of different voltages without adding additional circuit structures, and pre-charges the pre-charge capacitor through the power supply device without adding additional pre-charging branches, thereby simplifying the circuit structure and reducing production costs.

[0130] Figure 6 is a block diagram of a charging system according to an exemplary embodiment. Figure 6 As shown, the charging system 200 includes a charging circuit 201 and a controller 202, and the controller 202 is connected to the charging circuit 201. The charging circuit 201 includes: an energy storage module 2011, a switch component 2012, a pre-charge capacitor 2013 and a power battery 300, and the switch component 2012 includes a first switch component 2012a and a second switch component 2012b. The power battery 300 is suitable for connecting to the power supply device 400 through the first switch component 2012a and the second switch component 2012b, and the power battery 300 is also suitable for connecting to one end of the energy storage module 2011 through the first switch component 2012a, and the other end of the energy storage module 2011 is suitable for connecting to the power supply device 400 through the second switch component 2012b, and the pre-charge capacitor 2013 is suitable for being connected in parallel with the power battery 300 through the first switch component 2012a, and the pre-charge capacitor 2013 is also connected to one end of the energy storage module 2011.

[0131] The controller 202 is used to:

[0132] According to the output voltage of the power supply device 400 and the battery voltage of the power battery 300 , a target charging mode is determined from preset charging modes, and the preset charging modes include: at least one of a boost charging mode, a buck charging mode and a direct charging mode.

[0133] According to the target charging mode, the switch assembly 2012 and the energy storage module 2011 are controlled to pre-charge the pre-charge capacitor 2013 through the power supply device 400 and / or the energy storage module 2011 .

[0134] According to the target charging mode, the switch assembly 2012 and the energy storage module 2011 are controlled to charge the power battery 300 through the power supply device 400 and / or the energy storage module 2011 .

[0135] For example, the power supply device 400 in the present disclosure may be a charging pile or a mobile power source, which is not specifically limited in the present disclosure. The energy storage module 2011 may include any element capable of storing and releasing electrical energy, and a corresponding control switch. The energy storage module 2011 may include, for example, a three-phase inverter circuit and an inductor. The charging circuit 201 in the embodiment of the present disclosure can avoid the risk of a short circuit between the power battery 300 and the power supply device 400 due to the presence of the switch component 2012 and the energy storage module 2011.

[0136] Since the output voltage of the power supply device 400 and the battery voltage of the power battery 300 are not necessarily matched, after the power supply device 400 is connected to the charging circuit 201, the corresponding target charging mode can be determined from the preset charging modes according to the magnitude relationship between the output voltage of the power supply device 400 and the battery voltage of the power battery 300. The preset charging mode may include at least one of a boost charging mode, a buck charging mode, and a direct charging mode.

[0137] In some embodiments, when the output voltage of the power supply device 400 is less than the battery voltage of the power battery 300, or when the output voltage of the power supply device 400 is greater than the battery voltage of the power battery 300, but the difference between the battery voltage and the output voltage is less than a first preset voltage threshold, the boost charging mode may be used as the target charging mode; when the output voltage of the power supply device 400 is greater than the battery voltage of the power battery 300, and the difference between the output voltage and the battery voltage is greater than the first preset voltage threshold and less than the second preset voltage threshold, the direct charging mode may be used as the target charging mode; when the output voltage of the power supply device 400 is greater than the battery voltage of the power battery 300, and the difference between the output voltage and the battery voltage is greater than the second preset voltage threshold, the buck charging mode may be used as the target charging mode.

[0138] For example, different charging modes correspond to different switch states in the charging circuit, wherein the switch state includes the states of various switches in the switch assembly 2012 and the states of various switches in the energy storage module 2011. After determining the target charging mode, the states of various switches in the switch assembly 2012 and the states of various switches in the energy storage module 2011 can be controlled according to the target charging mode, so that the pre-charge capacitor 2013 is pre-charged through the power supply device 400 and / or the energy storage module 2011.

[0139] In other embodiments, when the target charging mode is the boost charging mode, the pre-charge capacitor 2013 can be pre-charged by the power supply device 400 and the energy storage module 2011 together, thereby achieving boost pre-charging of the pre-charge capacitor 2013; when the target charging mode is the buck charging mode, the pre-charge capacitor 2013 can be pre-charged by the energy storage module 2011, thereby achieving buck pre-charging of the pre-charge capacitor 2013; when the target charging mode is the direct charging mode, the pre-charge capacitor 2013 can be pre-charged by the power supply device 400, thereby achieving direct pre-charging of the pre-charge capacitor 2013.

[0140] For example, after the pre-charging of the pre-charge capacitor 2013 is completed, the states of various switches in the switch assembly 2012 and the states of various switches in the energy storage module 2011 can be controlled according to the target charging mode, so that the power battery 300 is charged through the power supply device 400 and / or the energy storage module 2011.

[0141] In other embodiments, when the target charging mode is the boost charging mode, the power battery 300 can be charged by the power supply device 400 and the energy storage module 2011 together, thereby achieving boost charging of the power battery 300; when the target charging mode is the buck charging mode, the power battery 300 can be charged by the energy storage module 2011, thereby achieving buck charging of the power battery 300; when the target charging mode is the direct charging mode, the power battery 300 can be charged by the power supply device 400, thereby achieving direct charging of the power battery 300.

[0142] In this way, when the output voltage of the power supply device 400 is less than the charging voltage of the power battery 300, the power battery 300 can be boosted and charged in the boost charging mode; when the output voltage of the power supply device 400 is greater than the charging voltage of the power battery 300, the power battery 300 can be bucked and charged in the buck charging mode, so that the power supply device 400 can output as much power as possible, thereby reducing the charging time; when the output voltage of the power supply device 400 meets the charging voltage of the power battery 300, the power battery 300 can be directly charged in the direct charging mode, so that the power supply device 400 with different voltages can be compatible, thereby improving the charging flexibility and the compatibility of the power battery 300 and the power supply device 400. In addition, by reusing the circuit structure of the motor controller and the motor of the vehicle, there is no need to add an additional boost or buck circuit structure, and the pre-charge capacitor 2013 is pre-charged by the power supply device 400, without adding an additional pre-charge branch, simplifying the circuit structure and reducing the production cost.

[0143] In summary, the present disclosure first determines the target charging mode from the preset charging modes according to the output voltage of the power supply device and the battery voltage of the power battery, wherein the preset charging mode includes at least one of a boost charging mode, a buck charging mode and a direct charging mode. Then, according to the target charging mode, the switch assembly and the energy storage module are controlled to pre-charge the pre-charge capacitor through the power supply device and / or the energy storage module, and when the pre-charging is completed, the switch assembly and the energy storage module are controlled according to the target charging mode to charge the power battery through the power supply device and / or the energy storage module. The present disclosure reuses the original energy storage module of the vehicle, pre-charges the pre-charge capacitor according to the target charging mode and charges the power battery, and can be compatible with power supply devices of different voltages without adding additional circuit structures, and pre-charges the pre-charge capacitor through the power supply device without adding additional pre-charging branches, thereby simplifying the circuit structure and reducing production costs.

[0144] Figure 7 is a block diagram of another charging system according to an exemplary embodiment. Figure 7 As shown, the charging circuit 201 also includes: a charging port capacitor 2015.

[0145] One end of the charging port capacitor 2015 is connected to the other end of the energy storage module 2011 , and one end of the charging port capacitor 2015 is connected to the other end of the energy storage module 2011 .

[0146] Among them, the charging port capacitor 2015 can reduce the ripple voltage output by the power supply device 400 and play a role in voltage stabilization.

[0147] Figure 8 is a block diagram of another charging system according to an exemplary embodiment. Figure 8As shown, the energy storage module 2011 includes: an inductor 2011a and a three-phase inverter circuit 2011b.

[0148] The first end of the pre-charge capacitor 2013 is also connected to the upper bridge arm of the three-phase inverter circuit 2011b, the second end of the pre-charge capacitor 2013 is connected to the lower bridge arm of the three-phase inverter circuit 2011b, the midpoint of the bridge arm of the three-phase inverter circuit 2011b is connected to the first end of the inductor 2011a, and the second end of the inductor 2011a is connected to the second switch component 2012b. The upper bridge arm of the three-phase inverter circuit 2011b is also connected to the second switch component 2012b, and the lower bridge arm of the three-phase inverter circuit 2011b is also connected to the second switch component 2012b.

[0149] For example, the midpoint of the bridge arm can be understood as the position of the connection line between the switch tube of the upper bridge arm and the switch tube of the lower bridge arm. The three-phase inverter circuit 2011b can be a circuit in the motor controller, and the inductor 2011a can be the inductor 2011a of the motor, thereby realizing the functional reuse of the motor controller and the motor module, simplifying the circuit structure and reducing the production cost.

[0150] Fig. 9 is a block diagram of another charging system according to an exemplary embodiment. Fig. 9 As shown, taking the power supply device 400 as a charging pile as an example, the first switch component 2012a includes: a first switch K1, a second switch K2, and a third switch K3. The second switch component 2012b includes: a fourth switch K4, a fifth switch K5, and a sixth switch K6.

[0151] The first end of the first switch K1 is suitable for being connected to the first end of the power battery 300 , and the second end of the first switch K1 is connected to the first end of the pre-charge capacitor 2013 .

[0152] The first end of the second switch K2 is suitable for being connected to the second end of the power battery 300 , and the second end of the second switch K2 is connected to the second end of the pre-charge capacitor 2013 .

[0153] A first end of the third switch K3 is suitable for being connected to a first end of the power battery 300 , and a second end of the third switch K3 is connected to a second end of the inductor 2011 a .

[0154] A first end of the fourth switch K4 is connected to the upper bridge arm of the three-phase inverter circuit 2011 b , and a second end of the fourth switch K4 is suitable for being connected to a first end of the power supply device 400 .

[0155] A first end of the fifth switch K5 is connected to the lower bridge arm of the three-phase inverter circuit 2011 b , and a second end of the fifth switch K5 is suitable for being connected to a second end of the power supply device 400 .

[0156] A first end of the sixth switch K6 is connected to the second end of the inductor 2011 a , and a second end of the sixth switch K6 is suitable for being connected to a first end of the power supply device 400 .

[0157] For example, the first switch K1 , the second switch K2 , the third switch K3 and the fifth switch K5 may be contactors, and the fourth switch K4 and the sixth switch K6 may be switch tubes, so that high-frequency control of the fourth switch K4 and the sixth switch K6 can be achieved.

[0158] The pre-charge resistor and contactor in the related art are connected in parallel with the first switch K1, and the power battery pre-charges the pre-charge capacitor through the branch where the pre-charge resistor and contactor are located. The embodiment of the present disclosure can replace the pre-charge capacitor in the related art with the pre-charge capacitor 2013 to simplify the circuit and reduce the cost, or retain the pre-charge capacitor in the related art as a redundant circuit design to improve the reliability of the charging system.

[0159] According to some embodiments of the present disclosure, the controller 202 is specifically configured to:

[0160] The fifth switch K5 is closed, the sixth switch K6 is turned on, and the first switch K1, the second switch K2, the third switch K3 and the fourth switch K4 are turned off.

[0161] The switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit 2011b are periodically controlled to be turned on alternately, so as to perform boost pre-charging for the pre-charge capacitor 2013 according to the boost charging mode.

[0162] For example, when the target charging mode is the boost charging mode, Fig.10 As shown, in step 1, the fifth switch K5 can be closed, the sixth switch K6 and the switch tube of the lower bridge arm of the three-phase inverter circuit 2011b can be turned on, and the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the switch tube of the upper bridge arm of the three-phase inverter circuit 2011b can be turned off to charge the inductor 2011a through the power supply device 400. Fig.11 As shown, in step 2, the fifth switch K5 can be kept closed, the sixth switch K6 can be turned on, and the first switch K1, the second switch K2, the third switch K3 and the fourth switch K4 can be turned off, and the switch tube of the lower bridge arm of the three-phase inverter circuit 2011b can be turned off, and the switch tube of the upper bridge arm of the three-phase inverter circuit 2011b can be turned on to utilize the freewheeling effect of the inductor 2011a to charge the pre-charge capacitor 2013 simultaneously through the power supply device 400 and the inductor 2011a, thereby achieving boost pre-charging of the pre-charge capacitor 2013.

[0163] In some embodiments, step one and step two can be repeated periodically, that is, the fifth switch K5 is kept closed, the sixth switch K6 is turned on, and the first switch K1, the second switch K2, the third switch K3 and the fourth switch K4 are disconnected, and the switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit 2011b are periodically controlled to be alternately turned on to continuously boost and pre-charge the pre-charge capacitor 2013 according to the boost charging mode.

[0164] According to some other embodiments of the present disclosure, the controller 202 is specifically configured to:

[0165] The first switch K1 , the second switch K2 , the fifth switch K5 , and the sixth switch K6 are closed, and the third switch K3 and the fourth switch K4 are opened.

[0166] The upper bridge and the lower bridge of the three-phase inverter circuit 2011b are periodically controlled to be alternately turned on, so as to perform boost charging for the power battery 300 according to the boost charging mode.

[0167] For example, when the target charging mode is the boost charging mode, Fig.10 As shown, in step 1, the first switch K1, the second switch K2 and the fifth switch K5 can be closed, the sixth switch K6 and the switch tube of the lower bridge arm of the three-phase inverter circuit 2011b are turned on, and the third switch K3, the fourth switch K4 and the switch tube of the upper bridge arm of the three-phase inverter circuit 2011b are turned off, so as to charge the inductor 2011a through the power supply device 400. Fig.12 As shown, in step 2, the first switch K1, the second switch K2, and the fifth switch K5 can be kept closed, and the sixth switch K6 can be turned on, while the third switch K3 and the fourth switch K4 can be turned off, and the switch tube of the lower bridge arm of the three-phase inverter circuit 2011b can be turned off, and the switch tube of the upper bridge arm of the three-phase inverter circuit 2011b can be turned on to utilize the freewheeling effect of the inductor 2011a to charge the power battery 300 simultaneously through the power supply device 400 and the inductor 2011a, thereby achieving boost charging of the power battery 300.

[0168] In some embodiments, step one and step two can be repeated periodically, that is, the first switch K1, the second switch K2, the fifth switch K5 are kept closed, the sixth switch K6 is turned on, and the third switch K3 and the fourth switch K4 are turned off, and the switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit 2011b are periodically controlled to be alternately turned on, so as to continuously boost charge the power battery 300 in the boost charging mode.

[0169] According to some other embodiments of the present disclosure, the controller 202 is specifically configured to:

[0170] The fifth switch K5 is closed to turn on the switch tube of the upper bridge arm of the three-phase inverter circuit 2011b, and the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the switch tube of the lower bridge arm of the three-phase inverter circuit 2011b are turned off.

[0171] The sixth switch K6 is periodically turned on to perform buck pre-charging for the pre-charge capacitor 2013 in buck charging mode.

[0172] For example, when the target charging mode is the buck charging mode, Fig.13 As shown, in step 1, the fifth switch K5 and the sixth switch K6 are closed to turn on the switch tube of the upper bridge arm of the three-phase inverter circuit 2011b, and the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the switch tube of the lower bridge arm of the three-phase inverter circuit 2011b are turned off to charge the inductor 2011a and the pre-charge capacitor 2013 in series through the power supply device 400. Fig.10 As shown, step one may also be: closing the fifth switch K5 and the sixth switch K6, turning on the switch tube of the lower bridge arm of the three-phase inverter circuit 2011b, and turning off the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the switch tube of the upper bridge arm of the three-phase inverter circuit 2011b, so as to charge the inductor 2011a through the power supply device 400. Fig.14 As shown, in step two, the fifth switch K5 can be kept closed, the switch tube of the upper bridge arm of the three-phase inverter circuit 2011b is turned on, and the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the switch tube of the lower bridge arm of the three-phase inverter circuit 2011b are disconnected, and the sixth switch K6 is disconnected, so as to utilize the freewheeling effect of the inductor 2011a to charge the pre-charge capacitor 2013 through the inductor 2011a, thereby realizing the step-down pre-charging of the pre-charge capacitor 2013.

[0173] In some embodiments, step 1 and step 2 may be repeated periodically, with step 1 being the Fig.13 Taking the circuit shown as an example, the fifth switch K5 can be kept closed, the switch tube of the upper bridge arm of the three-phase inverter circuit 2011b can be turned on, and the first switch K1, the second switch K2, the third switch K3, the fourth switch K4 and the switch tube of the lower bridge arm of the three-phase inverter circuit 2011b can be disconnected, and the sixth switch K6 can be periodically turned on to continuously perform buck pre-charging for the pre-charge capacitor 2013 in accordance with the buck charging mode.

[0174] According to some other embodiments of the present disclosure, the controller 202 is specifically configured to:

[0175] The second switch K2 , the third switch K3 , the fourth switch K4 and the fifth switch K5 are closed, and the first switch K1 and the sixth switch K6 are opened.

[0176] The switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit 2011b are periodically controlled to be turned on alternately, so as to perform step-down charging for the power battery 300 according to the step-down charging mode.

[0177] For example, when the target charging mode is the buck charging mode, Fig.15 As shown, in step 1, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5 can be closed to turn on the switch tube of the upper bridge arm of the three-phase inverter circuit 2011b, and the first switch K1 and the sixth switch K6 and the switch tube of the lower bridge arm of the three-phase inverter circuit 2011b are turned off to charge the inductor 2011a and the power battery 300 in series through the power supply device 400. Fig.16 As shown, step 1 may also be: closing the fourth switch K4 and the fifth switch K5, turning on the switch tube of the upper bridge arm of the three-phase inverter circuit 2011b, and turning off the first switch K1, the second switch K2, the third switch K3, the sixth switch K6 and the switch tube of the lower bridge arm of the three-phase inverter circuit 2011b, so as to charge the inductor 2011a through the power supply device 400. Fig.17 As shown, in step 2, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5 can be kept closed, and the first switch K1 and the sixth switch K6 can be opened, and the switch tube of the upper bridge arm of the three-phase inverter circuit 2011b is disconnected, and the switch tube of the lower bridge arm of the three-phase inverter circuit 2011b is turned on, so as to utilize the freewheeling effect of the inductor 2011a to charge the power battery 300 through the inductor 2011a, thereby realizing the step-down charging of the power battery 300.

[0178] In some embodiments, step 1 and step 2 may be repeated periodically, with step 1 being the Fig.15 Taking the circuit shown as an example, the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5 can be kept closed, and the first switch K1 and the sixth switch K6 can be opened, and the switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit 2011b can be periodically controlled to be alternately turned on, so as to continuously perform buck charging for the power battery 300 in a buck charging mode.

[0179] According to some other embodiments of the present disclosure, the controller 202 is specifically configured to:

[0180] The fifth switch K5 is closed, and the first switch K1, the second switch K2, the third switch K3, the sixth switch K6, and the switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit 2011b are opened.

[0181] The fourth switch K4 is periodically turned on to directly pre-charge the pre-charge capacitor 2013 according to the direct charging mode.

[0182] For example, when the target charging mode is the direct charging mode, Fig.18 As shown, in step 1, the fifth switch K5 can be closed, and the first switch K1, the second switch K2, the third switch K3, the fourth switch K4, the sixth switch K6, and the switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit 2011b are disconnected. In step 2, the fifth switch K5 can be kept closed, and the first switch K1, the second switch K2, the third switch K3, the sixth switch K6, and the switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit 2011b are disconnected, and the fourth switch K4 is turned on.

[0183] In some embodiments, step one and step two can be repeated periodically, that is, the fifth switch K5 is kept closed, and the first switch K1, the second switch K2, the third switch K3, the sixth switch K6 and the switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit 2011b are disconnected, and the fourth switch K4 is periodically turned on, wherein the preset voltage interval can be a smaller voltage interval, and the output voltage floating within the preset voltage interval can be considered to be stable, so that the pre-charge capacitor 2013 is directly pre-charged in accordance with the direct charging mode to avoid excessive current output by the power supply device 400 and damage to the pre-charge capacitor 2013.

[0184] According to some other embodiments of the present disclosure, the controller 202 is specifically configured to:

[0185] The first switch K1, the second switch K2 and the fifth switch K5 are closed, and the third switch K3, the sixth switch K6 and the switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit 2011b are opened.

[0186] The fourth switch K4 is periodically turned on, and after the output voltage of the power supply device is maintained in a preset voltage interval, the fourth switch K4 is kept turned on to directly charge the power battery 300 in a direct charging mode.

[0187] For example, when the target charging mode is the direct charging mode, Fig.19 As shown, in step 1, the first switch K1, the second switch K2 and the fifth switch K5 can be closed, and the third switch K3, the fourth switch K4, the sixth switch K6 and the switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit 2011b can be turned off. In step 2, the first switch K1, the second switch K2 and the fifth switch K5 can be kept closed, and the third switch K3, the sixth switch K6 and the switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit 2011b can be turned off, and the fourth switch K4 can be turned on.

[0188] In some embodiments, step one and step two can be repeated periodically, that is, the first switch K1, the second switch K2 and the fifth switch K5 are kept closed, and the third switch K3, the sixth switch K6 and the switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit 2011b are disconnected, and the fourth switch K4 is periodically turned on until the output voltage of the power supply device 400 stabilizes in a preset voltage range, and the fourth switch K4 is controlled to be continuously turned on, so as to directly charge the power battery 300 in a direct charging mode, and to avoid excessive current output by the power supply device 400 and damage to the power battery 300.

[0189] In summary, the present disclosure first determines the target charging mode from the preset charging modes according to the output voltage of the power supply device and the battery voltage of the power battery, wherein the preset charging mode includes at least one of a boost charging mode, a buck charging mode and a direct charging mode. Then, according to the target charging mode, the switch assembly and the energy storage module are controlled to pre-charge the pre-charge capacitor through the power supply device and / or the energy storage module, and when the pre-charging is completed, the switch assembly and the energy storage module are controlled according to the target charging mode to charge the power battery through the power supply device and / or the energy storage module. The present disclosure reuses the original energy storage module of the vehicle, pre-charges the pre-charge capacitor according to the target charging mode and charges the power battery, and can be compatible with power supply devices of different voltages without adding additional circuit structures, and pre-charges the pre-charge capacitor through the power supply device without adding additional pre-charging branches, thereby simplifying the circuit structure and reducing production costs.

[0190] Fig. 20 FIG. 1 is a block diagram of a controller according to an exemplary embodiment. Fig. 20 As shown, the controller 202 may include: a processor 2021 and a memory 2022. The controller 202 may also include one or more of a multimedia component 2023, an input / output (I / O) interface 2024, and a communication component 2025.

[0191] The processor 2021 is used to control the overall operation of the controller 202 to complete all or part of the steps in the above-mentioned charging control method. The memory 2022 is used to store various types of data to support the operation of the controller 202. For example, these data may include instructions for any application or method used to operate on the controller 202, and application-related data, such as contact data, sent and received messages, pictures, audio, video, etc. The memory 2022 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, disk or optical disk. The multimedia component 2023 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 2022 or sent through the communication component 2025. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 2024 provides an interface between the processor 2021 and other interface modules, and the above-mentioned other interface modules may be keyboards, mice, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 2025 is used for wired or wireless communication between the controller 202 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, is not limited here. Therefore, the corresponding communication component 2025 may include: Wi-Fi module, Bluetooth module, NFC module, etc.

[0192] In an exemplary embodiment, the controller 202 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned charging control method.

[0193] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the above-mentioned charging control method are implemented. For example, the computer-readable storage medium can be the above-mentioned memory 2022 including program instructions, and the above-mentioned program instructions can be executed by the processor 2021 of the controller 202 to complete the above-mentioned charging control method.

[0194] Fig.21 is a block diagram of a vehicle according to an exemplary embodiment, such as Fig.21 As shown, the vehicle 500 is provided with a controller 202 .

[0195] Fig. 22 is a block diagram of another vehicle according to an exemplary embodiment. Fig. 22 As shown, the vehicle 500 is provided with a charging system 200 .

[0196] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0197] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0198] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A charging control method, characterized in that: The method comprises: Determine a target charging mode from preset charging modes according to the output voltage of the power supply device and the battery voltage of the power battery, wherein the preset charging mode includes: at least one of a boost charging mode, a buck charging mode and a direct charging mode; According to the target charging mode, controlling the switch assembly and the energy storage module to pre-charge the pre-charge capacitor through the power supply device and / or the energy storage module; When the pre-charging is completed, the switch assembly and the energy storage module are controlled according to the target charging mode to charge the power battery through the power supply device and / or the energy storage module.

2. The method according to claim 1, characterized in that The target charging mode includes the boost charging mode; and according to the target charging mode, controlling the switch assembly and the energy storage module to pre-charge the pre-charge capacitor through the power supply device and / or the energy storage module includes: Controlling the switch assembly and the energy storage module to charge the energy storage module through the power supply device; The switch assembly and the energy storage module are controlled to pre-charge the pre-charge capacitor simultaneously through the power supply device and the energy storage module.

3. The method according to claim 2, characterized in that According to the target charging mode, controlling the switch assembly and the energy storage module to charge the power battery through the power supply device and / or the energy storage module includes: Controlling the switch assembly and the energy storage module to charge the energy storage module through the power supply device; The switch assembly and the energy storage module are controlled to charge the power battery simultaneously through the power supply device and the energy storage module.

4. The method according to claim 1, characterized in that The target charging mode includes the buck charging mode; and according to the target charging mode, controlling the switch assembly and the energy storage module to pre-charge the pre-charge capacitor through the power supply device and / or the energy storage module includes: Controlling the switch assembly and the energy storage module to charge the energy storage module and / or the pre-charge capacitor through the power supply device; The switch assembly and the energy storage module are controlled to pre-charge the pre-charge capacitor through the energy storage module.

5. The method according to claim 4, characterized in that According to the target charging mode, controlling the switch assembly and the energy storage module to charge the power battery through the power supply device and / or the energy storage module includes: Controlling the switch assembly and the energy storage module to charge the energy storage module and / or the power battery through the power supply device; The switch assembly and the energy storage module are controlled to charge the power battery through the energy storage module.

6. The method according to claim 1, characterized in that The target charging mode includes the direct charging mode; and according to the target charging mode, controlling the switch assembly and the energy storage module to pre-charge the pre-charge capacitor through the power supply device and / or the energy storage module includes: Controlling the switch assembly and the energy storage module to pre-charge the pre-charge capacitor through the power supply device; According to the target charging mode, controlling the switch assembly and the energy storage module to charge the power battery through the power supply device and / or the energy storage module includes: The switch assembly and the energy storage module are controlled to charge the power battery through the power supply device.

7. A charging system, characterized in that: The charging system comprises a charging circuit and a controller, wherein the charging circuit is connected to the controller, and the charging circuit comprises: a switch component, a pre-charge capacitor and an energy storage module, wherein the switch component comprises a first switch component and a second switch component; The power battery is suitable for being connected to the power supply device through the first switch assembly and the second switch assembly, the power battery is also suitable for being connected to one end of the energy storage module through the first switch assembly, the other end of the energy storage module is suitable for being connected to the power supply device through the second switch assembly, the pre-charge capacitor is suitable for being connected in parallel with the power battery through the first switch assembly, and the pre-charge capacitor is also connected to one end of the energy storage module; The controller is used to determine a target charging mode from preset charging modes according to the output voltage of the power supply device and the battery voltage of the power battery, wherein the preset charging mode includes at least one of a boost charging mode, a buck charging mode and a direct charging mode; According to the target charging mode, controlling the switch assembly and the energy storage module to pre-charge the pre-charge capacitor through the power supply device and / or the energy storage module; When the pre-charging is completed, the switch assembly and the energy storage module are controlled according to the target charging mode to charge the power battery through the power supply device and / or the energy storage module.

8. The system according to claim 7, characterized in that The charging circuit also includes: a charging port capacitor; One end of the charging port capacitor is connected to one end of the energy storage module, and the other end of the charging port capacitor is connected to the other end of the energy storage module.

9. The system according to claim 8, characterized in that The energy storage module includes: an inductor and a three-phase inverter circuit; The first end of the pre-charge capacitor is connected to the upper bridge arm of the three-phase inverter circuit, the second end of the pre-charge capacitor is connected to the lower bridge arm of the three-phase inverter circuit, the midpoint of the bridge arm of the three-phase inverter circuit is connected to the first end of the inductor, and the second end of the inductor is connected to the second switch component; the upper bridge arm of the three-phase inverter circuit is also connected to the second switch component, and the lower bridge arm of the three-phase inverter circuit is also connected to the second switch component.

10. The system according to claim 9, characterized in that The first switch assembly includes: a first switch, a second switch, and a third switch; the second switch assembly includes: a fourth switch, a fifth switch, and a sixth switch; The first end of the first switch is suitable for connecting to the first end of the power battery, and the second end of the first switch is connected to the first end of the pre-charge capacitor; The first end of the second switch is suitable for connecting to the second end of the power battery, and the second end of the second switch is connected to the second end of the pre-charge capacitor; The first end of the third switch is suitable for being connected to the first end of the power battery, and the second end of the third switch is connected to the second end of the inductor; The first end of the fourth switch is connected to the upper bridge arm of the three-phase inverter circuit, and the second end of the fourth switch is suitable for being connected to the first end of the power supply device; The first end of the fifth switch is connected to the lower bridge arm of the three-phase inverter circuit, and the second end of the fifth switch is suitable for being connected to the second end of the power supply device; The first end of the sixth switch is connected to the second end of the inductor, and the second end of the sixth switch is suitable for being connected to the first end of the power supply device.

11. The system according to claim 10, characterized in that The controller is specifically used for: closing the fifth switch, turning on the sixth switch, and opening the first switch, the second switch, the third switch, and the fourth switch; The switch tube of the upper bridge arm and the switch tube of the lower bridge arm of the three-phase inverter circuit are periodically controlled to be alternately turned on, so as to boost and pre-charge the pre-charge capacitor according to the boost charging mode.

12. The system according to claim 11, characterized in that The controller is specifically used for: closing the first switch, the second switch, the fifth switch, and the sixth switch, and opening the third switch and the fourth switch; The upper bridge and the lower bridge of the three-phase inverter circuit are periodically controlled to be alternately turned on, so as to perform boost charging for the power battery according to the boost charging mode.

13. The system according to claim 10, characterized in that The controller is specifically used for: Closing the fifth switch, turning on the switch tube of the upper bridge arm of the three-phase inverter circuit, and turning off the first switch, the second switch, the third switch, the fourth switch and the switch tube of the lower bridge arm of the three-phase inverter circuit; The sixth switch is periodically turned on to perform buck pre-charging for the pre-charge capacitor according to the buck charging mode.

14. The system according to claim 13, characterized in that The controller is specifically used for: closing the second switch, the third switch, the fourth switch and the fifth switch, and opening the first switch and the sixth switch; The switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit are periodically controlled to be alternately turned on, so as to perform buck charging for the power battery according to the buck charging mode.

15. The system according to claim 10, characterized in that The controller is specifically used for: Closing the fifth switch, and opening the first switch, the second switch, the third switch, the sixth switch, and the switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit; The fourth switch is periodically turned on to perform direct pre-charging for the pre-charge capacitor according to the direct charging mode.

16. The system according to claim 15, characterized in that The controller is specifically used for: Closing the first switch, the second switch and the fifth switch, and opening the third switch, the sixth switch and the switch tubes of the upper bridge arm and the lower bridge arm of the three-phase inverter circuit; The fourth switch is periodically turned on, and after the output voltage of the power supply device is maintained in a preset voltage interval, the fourth switch is kept turned on to directly charge the power battery according to the direct charging mode.

17. A controller, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 6.

18. A vehicle, characterized in that: The vehicle comprises the controller of claim 17 or the charging system of any one of claims 7-16.

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