Charging method, controller, vehicle, storage medium and product

Abstract

The invention relates to a charging method, a controller, a vehicle, a storage medium and a product. The method is applied to the vehicle, a first electric drive system and a second electric drive system of the vehicle are connected through a first switch to form a charging circuit, the first electric drive system is used for being connected with a charging pile, and the second electric drive system is used for being connected with a power battery. Acquiring the voltage grade of the charging pile; and according to the voltage grade of the charging pile, the working mode of the charging circuit is adjusted, and the working mode comprises a boost charging mode or a buck charging mode. According to the embodiment of the invention, the front-drive system and the rear-drive system of the electric vehicle can be used for charging the power battery of the electric vehicle by self-adapting to the charging voltage of the charging pile.

Description

Technical Field

[0001] The present disclosure relates to the technical field of new energy vehicles, and in particular to a charging method, a controller, a vehicle, a storage medium and a product. Background Art

[0002] At present, with the development of new energy technology, electric vehicles have been increasingly widely used. Electric vehicles are equipped with power batteries, which can receive and store the power provided by the charging pile, and release the stored power during the driving of the electric vehicle, thereby driving the electric vehicle.

[0003] In order to increase the charging speed of electric vehicles, more and more electric vehicles use 800V high-voltage power batteries. The maximum battery voltage of the power battery is 800V, and the required charging voltage may exceed 800V. However, the output voltage of most DC fast charging piles on the market is 500V or 750V. These charging piles cannot directly charge 800V high-voltage power batteries, causing electric vehicles equipped with high-voltage power batteries to face charging difficulties, which is not conducive to improving user experience. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a charging method, a controller, a vehicle, a storage medium and a product.

[0005] According to a first aspect of an embodiment of the present disclosure, a charging method is provided, which is applied to a vehicle, wherein a first electric drive system and a second electric drive system of the vehicle are connected via a first switch to form a charging circuit, the first electric drive system is used to connect to a charging pile, and the second electric drive system is used to connect to a power battery, and the method includes:

[0006] When the vehicle is connected to the charging pile, obtaining a voltage level of the charging pile;

[0007] According to the voltage level of the charging pile, the working mode of the charging circuit is adjusted, and the working mode includes a boost charging mode or a buck charging mode.

[0008] Optionally, adjusting the working mode of the charging circuit according to the voltage level of the charging pile includes:

[0009] When the voltage of the charging pile is less than the maximum charging voltage of the power battery, controlling the charging circuit to enter a boost charging mode;

[0010] In the boost charging mode, charging is performed according to the maximum output voltage and maximum output current of the charging pile.

[0011] Optionally, the first electric drive system includes a first inverter and a first motor, the first inverter is connected to the three-phase coil of the first motor, and the second electric drive system includes a second inverter and a second motor, the second inverter is connected to the three-phase coil of the second motor;

[0012] The controlling the charging circuit to enter a boost charging mode comprises:

[0013] Controlling the first switch to close;

[0014] Controlling the first half bridge of the first inverter to be turned on and the second half bridge to be turned off, and controlling the first half bridge of the second inverter to be turned off and the second half bridge to be turned on, so as to charge the three-phase coil of the first motor and the three-phase coil of the second motor through the charging pile;

[0015] After the three-phase coil of the first motor and the three-phase coil of the second motor are fully charged, the first half-bridge of the first inverter is controlled to be turned on and the second half-bridge is turned off, and the first half-bridge of the second inverter is controlled to be turned on and the second half-bridge is turned off, so as to charge the power battery through the charging pile, the three-phase coil of the first motor and the three-phase coil of the second motor;

[0016] The first half bridge and the second half bridge of the second inverter are controlled to be alternately turned on at a set frequency to achieve boost charging.

[0017] Optionally, adjusting the working mode of the charging circuit according to the voltage level of the charging pile further includes:

[0018] When the voltage of the charging pile is greater than the maximum charging voltage of the power battery, controlling the charging circuit to enter a step-down charging mode;

[0019] In the step-down charging mode, the charging method is determined according to the acceptable power of the power battery.

[0020] Optionally, in the step-down charging mode, determining a charging method according to the acceptable power of the power battery includes:

[0021] When the acceptable power of the power battery is greater than the maximum output power of the charging pile, the charging pile is requested to output at the maximum power, and the charging circuit is controlled to enter the buck-and-current boost charging mode.

[0022] Optionally, the first electric drive system includes a first inverter and a first motor, the first inverter is connected to the three-phase coil of the first motor, the second electric drive system includes a second inverter and a second motor, the second inverter is connected to the three-phase coil of the second motor, and the buck-and-current-boost charging method includes:

[0023] Controlling the first switch to close;

[0024] Controlling the first half bridge of the first inverter to be turned on and the second half bridge to be turned off, and controlling the first half bridge of the second inverter to be turned on and the second half bridge to be turned off, so as to charge the three-phase coils of the first motor and the three-phase coils of the second motor through the charging pile, and to charge the power battery by reducing the voltage and increasing the current;

[0025] After the three-phase coils of the first motor and the three-phase coils of the second motor are fully charged, the first half-bridge of the first inverter is controlled to be turned off and the second half-bridge is turned on, and the first half-bridge of the second inverter is controlled to be turned on and the second half-bridge is turned off, so as to charge the power battery through the three-phase coils of the first motor and the three-phase coils of the second motor;

[0026] The first half bridge and the second half bridge of the first inverter are controlled to be turned on alternately at a set frequency to achieve voltage reduction and current increase charging.

[0027] Optionally, determining the charging mode further includes:

[0028] During the step-down and step-up charging process, obtaining the current acceptable power of the power battery;

[0029] When the current acceptable power of the power battery is less than the maximum output power of the charging pile, the charging circuit is controlled to enter a direct charging mode, and the charging pile is requested to output a charging voltage according to the current charging voltage of the power battery.

[0030] Optionally, in the step-down charging mode, determining the charging method according to the acceptable power of the power battery further includes:

[0031] In the step-down charging mode, when the acceptable power of the power battery is less than the maximum output power of the charging pile, the charging circuit is controlled to enter the direct charging mode, and the charging pile is requested to output the charging voltage according to the rated voltage of the power battery.

[0032] Optionally, the charging circuit further includes a second switch and a third switch, the second switch is used to connect the positive electrode of the charging pile and the positive electrode of the power battery, and the third switch is used to connect the negative electrode of the charging pile and the negative electrode of the power battery, and the controlling the charging circuit to enter the direct charging mode includes:

[0033] Controlling all switch tubes of the first electric drive system and the second electric drive system to be cut off;

[0034] The second switch and the third switch are controlled to be closed, and the charging pile directly charges the power battery through the second switch and the third switch.

[0035] Optionally, the first electric drive system includes: a first inverter and a first motor, and the second electric drive system includes: a second inverter and a second motor;

[0036] The first ends of the three-phase coils of the first motor are respectively connected to the three-phase bridge arms of the first inverter, the second ends of the three-phase coils of the first motor are connected to the first end of the first switch, the first ends of the three-phase coils of the second motor are respectively connected to the three-phase bridge arms of the second inverter, the second ends of the three-phase coils of the second motor are connected to the second end of the first switch, the first end of the first inverter is connected to the positive electrode of the charging pile, the second end of the first inverter is connected to the negative electrode of the charging pile, the first end of the second inverter is connected to the positive electrode of the power battery, the second end of the second inverter is connected to the negative electrode of the power battery, and the second end of the first inverter is connected to the second end of the second inverter;

[0037] The first half bridge of the first inverter includes a switch tube connected to the positive electrode of the charging pile, and the second half bridge of the first inverter includes a switch tube connected to the negative electrode of the charging pile;

[0038] The first half bridge of the second inverter includes a switch tube connected to the positive electrode of the power battery, and the second half bridge of the second inverter includes a switch tube connected to the negative electrode of the power battery.

[0039] According to a second aspect of an embodiment of the present disclosure, there is provided a charging controller, including:

[0040] processor;

[0041] a memory for storing processor-executable instructions;

[0042] The processor is configured to: execute the executable instructions to implement any one of the methods in the first aspect.

[0043] According to a third aspect of an embodiment of the present disclosure, a vehicle is provided, comprising the charging circuit described in any one of the first aspect and the charging controller described in the second aspect.

[0044] According to a fourth aspect of an embodiment of the present disclosure, there is provided a computer-readable storage medium having computer program instructions stored thereon, wherein the program instructions, when executed by a processor, implement the steps of any one of the methods described in the first aspect.

[0045] According to a fifth aspect of an embodiment of the present disclosure, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps of any one of the methods in the first aspect are implemented.

[0046] In summary, the embodiment of the present disclosure provides a charging method, which is applied to a vehicle, wherein the first electric drive system and the second electric drive system of the vehicle are connected through a first switch to form a charging circuit, wherein the first electric drive system is used to connect to a charging pile, and the second electric drive system is used to connect to a power battery, and the method comprises: when the vehicle is connected to the charging pile, obtaining the voltage level of the charging pile; and adjusting the working mode of the charging circuit according to the voltage level of the charging pile, wherein the working mode comprises a boost charging mode or a buck charging mode. The embodiment of the present disclosure can realize charging the power battery of the electric vehicle by using the charging voltage of the adaptive charging pile of the front drive system and the rear drive system of the electric vehicle.

[0047] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0049] Figure 1 is a schematic diagram of a charging circuit according to an exemplary embodiment.

[0050] Figure 2 The figure is a flow chart of a charging method according to an exemplary embodiment.

[0051] Figure 3 is a schematic diagram of a charging circuit according to an exemplary embodiment.

[0052] Figure 4 The figure is a flow chart of a charging method according to an exemplary embodiment.

[0053] Figure 5 The figure is a flow chart of a charging method according to an exemplary embodiment.

[0054] Figure 6 The figure is a flow chart of a charging method according to an exemplary embodiment.

[0055] Figure 7 The figure is a flow chart of a charging method according to an exemplary embodiment.

[0056] Figure 8 The figure is a flow chart of a charging method according to an exemplary embodiment.

[0057] Fig. 9 is a schematic diagram of a charging circuit according to an exemplary embodiment.

[0058] Fig.10is a block diagram of a charging controller according to an exemplary embodiment.

[0059] Fig.11 is a block diagram of a vehicle according to an exemplary embodiment. DETAILED DESCRIPTION

[0060] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0061] It should be understood that the term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0062] It should be noted that the concepts of "first", "second", etc. mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units. The modifications of "one" and "multiple" mentioned in the present disclosure are illustrative and not restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more". In the description of the present disclosure, unless otherwise specified, "multiple" refers to two or more than two, and other quantifiers are similar; "at least one item", "one item or multiple items" or similar expressions refer to any combination of these items, including any combination of single items or plural items.

[0063] Although operations or steps are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood that it is required to perform these operations or steps in the specific order shown or in a serial order, or to perform all the operations or steps shown to obtain the desired results. In the embodiments of the present disclosure, these operations or steps can be performed in series; these operations or steps can also be performed in parallel; or some of these operations or steps can be performed.

[0064] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only for illustrative purposes and are not used to limit the scope of these messages or information. It is understandable that before using the technical solutions disclosed in the embodiments of the present disclosure, the type, scope of use, and usage scenarios of the personal information involved in the present disclosure should be informed to the user in an appropriate manner in accordance with relevant laws and regulations and the user's authorization should be obtained.

[0065] First, the application scenario of the present disclosure is explained. There are currently three mainstream voltage platforms for charging piles on the market: 500V platform, 750V platform and 1000V platform. Among them, charging piles with a 750v voltage platform occupy the mainstream of the market, and charging piles with a 1000v voltage platform have become a future growth point. The number of old 500V charging piles is slowly decreasing, but there is still a certain stock. Based on the development trend of public charging piles, some vehicle manufacturers design the battery voltage to be less than the maximum 750V platform voltage, making how to be compatible with low-voltage charging piles (500V old charging piles) a mainstream issue. In addition, how to fully utilize the power of the high-voltage charging pile, shorten the charging time, and improve the charging efficiency is also a problem that needs to be solved urgently. The present disclosure is explained below in conjunction with specific embodiments.

[0066] Figure 1 FIG. 1 is a schematic diagram of a charging circuit according to an exemplary embodiment. Figure 1 As shown, the embodiment of the present disclosure provides a charging circuit 100, wherein the first electric drive system 101 and the second electric drive system 102 of the vehicle are connected through a first switch K1 to form the charging circuit 100, wherein the first electric drive system 101 is used to connect to a charging pile 200, and the second electric drive system 102 is used to connect to a power battery 300. In this way, the existing hardware resources of the electric vehicle can be fully utilized, and a charging circuit can be formed by adding only one switch, thereby reducing the solution cost.

[0067] Figure 2 FIG. 1 is a flow chart of a charging method according to an exemplary embodiment. Figure 2 As shown, the embodiment of the present disclosure provides a charging method, which is applied to a charging circuit 100. The method may include the following steps:

[0068] In step S10, when the vehicle is connected to the charging pile, the voltage level of the charging pile is obtained.

[0069] In this step, when the vehicle is connected to the charging pile 200 , the voltage level of the charging pile 200 is obtained.

[0070] In step S20, the operating mode of the charging circuit is adjusted according to the voltage level of the charging pile, and the operating mode includes a boost charging mode or a buck charging mode.

[0071] In this step, the working mode of the charging circuit 100 is adjusted according to the voltage level of the charging pile 200, and the working mode includes a boost charging mode or a buck charging mode. In this way, the charging voltage of the front drive system and the rear drive system of the electric vehicle can be used to charge the power battery of the electric vehicle.

[0072] For example, when the voltage of the charging pile 200 is less than the rated voltage of the power battery 300, the charging circuit 100 can be controlled to enter the boost charging mode; in the boost charging mode, charging is performed according to the maximum output voltage and maximum output current of the charging pile 200; when the voltage of the charging pile 200 is greater than the rated voltage of the power battery 300, the charging circuit 100 is controlled to enter the buck charging mode, and in the buck charging mode, the charging method is determined according to the acceptable power of the power battery 300; the charging method may include a buck-boost charging method and a direct charging method. Among them, the buck-boost charging method can reduce the charging voltage and increase the charging current to fully utilize the power of the charging pile, shorten the charging time, and thus improve the charging efficiency.

[0073] In summary, the embodiment of the present disclosure provides a charging method, which is applied to a vehicle, wherein the first electric drive system and the second electric drive system of the vehicle are connected through a first switch to form a charging circuit, wherein the first electric drive system is used to connect to a charging pile, and the second electric drive system is used to connect to a power battery, and the method comprises: when the vehicle is connected to the charging pile, obtaining the voltage level of the charging pile; and adjusting the working mode of the charging circuit according to the voltage level of the charging pile, wherein the working mode comprises a boost charging mode or a buck charging mode. The embodiment of the present disclosure can realize charging the power battery of the electric vehicle by using the charging voltage of the adaptive charging pile of the front drive system and the rear drive system of the electric vehicle.

[0074] Figure 3 FIG. 1 is a schematic diagram of a charging circuit according to an exemplary embodiment. Figure 3 As shown, the first electric drive system 101 includes a first inverter 1011 and a first motor 1012, the first inverter 1011 is connected to the three-phase coils L11, L12 and L13 of the first motor 1012, and the second electric drive system 102 includes a second inverter 1021 and a second motor 1022, the second inverter 1021 is connected to the three-phase coils L21, L22 and L23 of the second motor 1022.

[0075] Figure 4 FIG. 1 is a flow chart of a charging method according to an exemplary embodiment. Figure 4 As shown, adjusting the working mode of the charging circuit according to the voltage level of the charging pile may include the following steps:

[0076] In step S201, when the voltage of the charging pile is less than the maximum charging voltage of the power battery, the charging circuit is controlled to enter a boost charging mode.

[0077] In this step, when the voltage of the charging pile 200 is less than the maximum charging voltage of the power battery 300 , the charging circuit 100 is controlled to enter the boost charging mode.

[0078] Exemplarily, controlling the charging circuit 100 to enter the boost charging mode may include the following sub-steps:

[0079] In step S2011, the first switch K1 is controlled to be closed.

[0080] In step S2012, the first half bridge of the first inverter 1011 is controlled to be turned on and the second half bridge is turned off, and the first half bridge of the second inverter 1021 is controlled to be turned off and the second half bridge is turned on, so as to charge the three-phase coils L11, L12 and L13 of the first motor 1012 and the three-phase coils L21, L22 and L23 of the second motor 1022 through the charging pile 200.

[0081] In step S2013, after the three-phase coils L11, L12 and L13 of the first motor 1012 and the three-phase coils L21, L22 and L23 of the second motor 1022 are charged, the first half-bridge of the first inverter 1011 is controlled to be turned on and the second half-bridge is turned off, and the first half-bridge of the second inverter 1021 is controlled to be turned on and the second half-bridge is turned off, so as to charge the power battery 300 through the charging pile 200, the three-phase coils L11, L12 and L13 of the first motor 1012 and the three-phase coils L21, L22 and L23 of the second motor 1022.

[0082] In step S2014, the first half bridge and the second half bridge of the second inverter 1021 are controlled to be alternately turned on at a set frequency to achieve boost charging.

[0083] In the above steps, the first half bridge of the first inverter 1011 includes switch tubes Q11, Q13 and Q15 connected to the positive pole of the charging pile 200, and the second half bridge of the first inverter 1011 includes switch tubes Q12, Q14 and Q16 connected to the negative pole of the charging pile 200.

[0084] The first half bridge of the second inverter 1021 includes switch tubes Q21 , Q23 and Q25 connected to the positive electrode of the power battery 300 , and the second half bridge of the second inverter 1021 includes switch tubes Q22 , Q24 and Q26 connected to the negative electrode of the power battery 300 .

[0085] In step S202, in the boost charging mode, charging is performed according to the maximum output voltage and maximum output current of the charging pile.

[0086] In this step, in the boost charging mode, charging is performed according to the maximum output voltage and maximum output current of the charging pile 200. In this way, the power of the charging pile can be fully utilized, the charging time can be shortened, and the charging efficiency can be improved.

[0087] Figure 5 FIG. 1 is a flow chart of a charging method according to an exemplary embodiment. Figure 5 As shown, adjusting the working mode of the charging circuit according to the voltage level of the charging pile may also include the following steps:

[0088] In step S203, when the voltage of the charging pile is greater than the maximum charging voltage of the power battery, the charging circuit is controlled to enter a step-down charging mode.

[0089] In this step, when the voltage of the charging pile 200 is greater than the maximum charging voltage of the power battery 300 , the charging circuit 100 is controlled to enter the step-down charging mode.

[0090] In step S204, in the step-down charging mode, a charging method is determined according to the acceptable power of the power battery.

[0091] In this step, in the buck charging mode, the charging mode is determined according to the acceptable power of the power battery 300. For example, when the acceptable power of the power battery 300 is greater than the maximum output power of the charging pile 200, the charging pile 200 is requested to output at the maximum power, and the charging circuit 100 is controlled to enter the buck-boost charging mode. In this way, the power of the charging pile can be fully utilized, the charging time can be shortened, and the charging efficiency can be improved.

[0092] Figure 6 FIG. 1 is a flow chart of a charging method according to an exemplary embodiment. Figure 6 As shown, in the step-down charging mode, determining the charging method according to the acceptable power of the power battery may include the following steps:

[0093] In step S2041, when the acceptable power of the power battery is greater than the maximum output power of the charging pile, the charging pile is requested to output at the maximum power, and the charging circuit is controlled to enter the buck-and-boost charging mode.

[0094] In this step, when the acceptable power of the power battery 300 is greater than the maximum output power of the charging pile 200, the charging pile 200 is requested to output at the maximum power, and the charging circuit 100 is controlled to enter the buck-boost charging mode. Figure 3 , controlling the charging circuit 100 to enter the buck-current boost charging mode may include the following sub-steps:

[0095] In step S20411, the first switch K1 is controlled to be closed.

[0096] In step S20412, the first half bridge of the first inverter 1011 is controlled to be turned on and the second half bridge is controlled to be turned off, and the first half bridge of the second inverter 1021 is controlled to be turned on and the second half bridge is controlled to be turned off, so as to charge the three-phase coils L11, L12 and L13 of the first motor 1012 and the three-phase coils L21, L22 and L23 of the second motor 1022 through the charging pile 200, and to charge the power battery 300 by reducing the voltage and increasing the current.

[0097] In step S20413, after the three-phase coils L11, L12 and L13 of the first motor 1012 and the three-phase coils L21, L22 and L23 of the second motor 1022 are charged, the first half-bridge of the first inverter 1011 is controlled to be cut off and the second half-bridge is controlled to be turned on, and the first half-bridge of the second inverter 1021 is controlled to be turned on and the second half-bridge is controlled to be cut off, so as to charge the power battery 300 through the three-phase coils L11, L12 and L13 of the first motor 1012 and the three-phase coils L21, L22 and L23 of the second motor 1022.

[0098] In step S20414, the first half bridge and the second half bridge of the first inverter 1011 are controlled to be turned on alternately at a set frequency to achieve voltage reduction and current increase charging.

[0099] Figure 7 FIG. 1 is a flow chart of a charging method according to an exemplary embodiment. Figure 7 As shown, the determining of the charging mode may further include the following steps:

[0100] In step S2042, during the step of stepping down and stepping up charging, the currently acceptable power of the power battery is obtained.

[0101] In this step, during the step-down and step-up charging process, the currently acceptable power of the power battery 300 is obtained.

[0102] In step S2043, when the current acceptable power of the power battery is less than the maximum output power of the charging pile, the charging circuit is controlled to enter the direct charging mode, and the charging pile is requested to output a charging voltage according to the current charging voltage of the power battery.

[0103] In this step, when the current acceptable power of the power battery 300 is less than the maximum output power of the charging pile 200, the charging circuit 100 is controlled to enter the direct charging mode, and the charging pile 200 is requested to output the charging voltage according to the current charging voltage of the power battery 300. In this way, the charging pile 200 can charge the power battery 300 according to the power matching the power battery 300, preventing damage to the power battery 300.

[0104] Figure 8 FIG. 1 is a flow chart of a charging method according to an exemplary embodiment. Figure 8 As shown, in the step-down charging mode, determining the charging method according to the acceptable power of the power battery may further include the following steps:

[0105] In step S2044, in the step-down charging mode, when the acceptable power of the power battery is less than the maximum output power of the charging pile, the charging circuit is controlled to enter the direct charging mode, and the charging pile is requested to output the charging voltage according to the rated voltage of the power battery.

[0106] In this step, in the step-down charging mode, when the acceptable power of the power battery 300 is less than the maximum output power of the charging pile 200, the charging circuit 100 is controlled to enter the direct charging mode, and the charging pile 200 is requested to output the charging voltage according to the rated voltage of the power battery 300. Because as the power battery is charged, the power of the power battery increases, and the acceptable power of the power battery is gradually reduced, so when the acceptable power of the power battery 300 is less than the maximum output power of the charging pile 200, the charging circuit 100 is controlled to enter the direct charging mode, and the charging pile 200 is requested to output the charging voltage according to the rated voltage of the power battery 300, which can prevent damage to the power battery 300.

[0107] Fig. 9 FIG. 1 is a schematic diagram of a charging circuit according to an exemplary embodiment. Fig. 9 As shown, the charging circuit 100 further includes a second switch K2 and a third switch K3, wherein the second switch K2 is used to connect the positive electrode of the charging pile and the positive electrode of the power battery 300, and the third switch K3 is used to connect the negative electrode of the charging pile and the negative electrode of the power battery 300.

[0108] Reference Fig. 9 , the controlling the charging circuit to enter the direct charging mode may include the following sub-steps:

[0109] In sub-step 1, all switch tubes of the first electric drive system 101 and the second electric drive system 102 are controlled to be turned off.

[0110] In sub-step 2, the second switch K2 and the third switch K3 are controlled to be closed, and the charging pile 200 directly charges the power battery 300 through the second switch K2 and the third switch K3.

[0111] In some embodiments, after charging is completed, the vehicle can enter the driving mode by opening the first switch K1 and closing the second switch K2 and the third switch K3.

[0112] In some embodiments, reference Figure 3 The first electric drive system 101 includes: a first inverter 1011 and a first motor 1012 , and the second electric drive system 102 includes: a second inverter 1021 and a second motor 1022 .

[0113] The first ends of the three-phase coils L11, L12 and L13 of the first motor 1012 are respectively connected to the three-phase bridge arms of the first inverter 1011, the second ends of the three-phase coils L11, L12 and L13 of the first motor 1012 are connected to the first end of the first switch K1, the first ends of the three-phase coils L21, L22 and L23 of the second motor 1022 are respectively connected to the three-phase bridge arms of the second inverter 1021, the second ends of the three-phase coils L21, L22 and L23 of the second motor 1022 are connected to the second end of the first switch K1, the first end of the first inverter 1011 is connected to the positive pole of the charging pile 200, the second end of the first inverter 1011 is connected to the negative pole of the charging pile 200, the first end of the second inverter 1021 is connected to the positive pole of the power battery 300, the second end of the second inverter 1021 is connected to the negative pole of the power battery 300, and the second end of the first inverter 1011 is connected to the second end of the second inverter 1021.

[0114] The first half bridge of the first inverter 1011 includes switch tubes Q11 , Q13 and Q15 connected to the positive electrode of the charging pile 200 , and the second half bridge of the first inverter 1011 includes switch tubes Q12 , Q14 and Q16 connected to the negative electrode of the charging pile 200 .

[0115] The first half bridge of the second inverter 1021 includes switch tubes Q21 , Q23 and Q25 connected to the positive electrode of the power battery 300 , and the second half bridge of the second inverter 1021 includes switch tubes Q22 , Q24 and Q26 connected to the negative electrode of the power battery 300 .

[0116] In summary, the embodiment of the present disclosure provides a charging method, which is applied to a vehicle, wherein the first electric drive system and the second electric drive system of the vehicle are connected through a first switch to form a charging circuit, wherein the first electric drive system is used to connect to a charging pile, and the second electric drive system is used to connect to a power battery, and the method comprises: when the vehicle is connected to the charging pile, obtaining the voltage level of the charging pile; and adjusting the working mode of the charging circuit according to the voltage level of the charging pile, wherein the working mode comprises a boost charging mode or a buck charging mode. The embodiment of the present disclosure can realize charging the power battery of the electric vehicle by using the charging voltage of the adaptive charging pile of the front drive system and the rear drive system of the electric vehicle.

[0117] The present disclosure also provides a computer-readable storage medium having computer program instructions stored thereon, and the program instructions, when executed by a processor, implement the steps of the charging method provided by the present disclosure.

[0118] Fig.10 is a block diagram of a charging controller according to an exemplary embodiment. Fig.10 The charging controller 1000 may include one or more of the following components: a processing component 1002 , a memory 1004 , a power component 1006 , a multimedia component 1008 , an audio component 1010 , an input / output interface 1012 , a sensor component 1014 , and a communication component 1016 .

[0119] The processing component 1002 generally controls the overall operation of the charge controller 1000, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 1002 may include one or more processors 1020 to execute instructions to complete all or part of the steps of the above-described method. In addition, the processing component 1002 may include one or more modules to facilitate the interaction between the processing component 1002 and other components. For example, the processing component 1002 may include a multimedia module to facilitate the interaction between the multimedia component 1008 and the processing component 1002.

[0120] The memory 1004 is configured to store various types of data to support the operation of the charge controller 1000. Examples of such data include instructions for any application or method operating on the charge controller 1000, contact data, phone book data, messages, pictures, videos, etc. The memory 1004 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0121] The power supply assembly 1006 provides power to the various components of the charge controller 1000. The power supply assembly 1006 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the charge controller 1000.

[0122] The multimedia component 1008 includes a screen that provides an output interface between the charging controller 1000 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 1008 includes a front camera and / or a rear camera. When the charging controller 1000 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0123] The audio component 1010 is configured to output and / or input audio signals. For example, the audio component 1010 includes a microphone (MIC), and when the charging controller 1000 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive an external audio signal. The received audio signal may be further stored in the memory 1004 or sent via the communication component 1016. In some embodiments, the audio component 1010 also includes a speaker for outputting audio signals.

[0124] The input / output interface 1012 provides an interface between the processing component 1002 and the peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0125] The sensor assembly 1014 includes one or more sensors for providing various aspects of the status assessment of the charge controller 1000. For example, the sensor assembly 1014 can detect the on / off state of the charge controller 1000, the relative positioning of components, such as the display and keypad of the charge controller 1000, the sensor assembly 1014 can also detect the position change of the charge controller 1000 or a component of the charge controller 1000, the presence or absence of user contact with the charge controller 1000, the orientation or acceleration / deceleration of the charge controller 1000, and the temperature change of the charge controller 1000. The sensor assembly 1014 can include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 1014 can also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 1014 can also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0126] The communication component 1016 is configured to facilitate wired or wireless communication between the charging controller 1000 and other devices. The charging controller 1000 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 1016 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 1016 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0127] In an exemplary embodiment, the charging controller 1000 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above methods.

[0128] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 1004 including instructions, and the instructions can be executed by the processor 1020 of the charging controller 1000 to complete the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0129] In addition to being an independent electronic device, the above-mentioned device can also be a part of an independent electronic device. For example, in one embodiment, the device can be an integrated circuit (IC) or a chip, wherein the integrated circuit can be an IC or a collection of multiple ICs; the chip can include but is not limited to the following types: GPU (Graphics Processing Unit), CPU (Central Processing Unit), FPGA (Field Programmable Gate Array), DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), SOC (System on Chip, SoC, system on chip or system-level chip), etc. The above-mentioned integrated circuit or chip can be used to execute executable instructions (or codes) to implement the above-mentioned charging method. The executable instructions can be stored in the integrated circuit or chip, or can be obtained from other devices or equipment, such as the integrated circuit or chip including a processor, a memory, and an interface for communicating with other devices. The executable instruction may be stored in the memory, and when the executable instruction is executed by the processor, the above-mentioned charging method is implemented; alternatively, the integrated circuit or chip may receive the executable instruction through the interface and transmit it to the processor for execution, so as to implement the above-mentioned charging method.

[0130] In another exemplary embodiment, a computer program product is also provided. The computer program product includes a computer program executable by a programmable device, and the computer program has a code portion for executing the above-mentioned charging method when executed by the programmable device.

[0131] Fig.11 is a block diagram of a vehicle according to an exemplary embodiment. Fig.11 , the vehicle 1100 may include a charging circuit 100 and a charging controller 1000, as well as various subsystems, such as an infotainment system 1110, a perception system 1120, a decision control system 1130, a drive system 1140, and a computing platform 1150. The vehicle 1100 may also include more or fewer subsystems, and each subsystem may include multiple components. In addition, each subsystem and each component of the vehicle 1100 may be interconnected by wire or wirelessly.

[0132] In some embodiments, the infotainment system 1110 may include a communication system, an entertainment system, and a navigation system, etc.

[0133] The perception system 1120 may include several sensors for sensing information about the environment around the vehicle 1100. For example, the perception system 1120 may include a global positioning system (the global positioning system may be a GPS system, or a Beidou system or other positioning systems), an inertial measurement unit (IMU), a laser radar, a millimeter wave radar, an ultrasonic radar, and a camera.

[0134] The decision control system 1130 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0135] The drive system 1140 may include components that provide powered motion for the vehicle 1100. In one embodiment, the drive system 1140 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of an internal combustion engine, an electric motor, and an air compression engine. The engine is capable of converting energy provided by the energy source into mechanical energy.

[0136] Some or all functions of the vehicle 1100 are controlled by a computing platform 1150. The computing platform 1150 may include at least one processor 1151 and a memory 1152, and the processor 1151 may execute instructions 1153 stored in the memory 1152.

[0137] The processor 1151 may be any conventional processor, such as a commercially available CPU. The processor may also include a graphics processor (Graphic Process Unit, GPU), a field programmable gate array (Field Programmable Gate Array, FPGA), a system on chip (System on Chip, SOC), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC) or a combination thereof.

[0138] Memory 1152 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0139] In addition to instructions 1153 , memory 1152 may also store data, such as road maps, route information, and data such as the location, direction, and speed of the vehicle. The data stored in memory 1152 may be used by computing platform 1150 .

[0140] In the embodiment of the present disclosure, the processor 1151 may execute instruction 1153 to complete all or part of the steps of the above-mentioned charging method.

[0141] In another exemplary embodiment, a computer program product is also provided. The computer program product includes a computer program executable by a programmable device, and the computer program has a code portion for executing the above-mentioned charging method when executed by the programmable device.

[0142] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are to be considered as exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0143] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A charging method, characterized in that: Applied to a vehicle, a first electric drive system and a second electric drive system of the vehicle are connected through a first switch to form a charging circuit, the first electric drive system is used to connect to a charging pile, and the second electric drive system is used to connect to a power battery, and the method includes: When the vehicle is connected to the charging pile, obtaining a voltage level of the charging pile; According to the voltage level of the charging pile, the working mode of the charging circuit is adjusted, and the working mode includes a boost charging mode or a buck charging mode.

2. The method according to claim 1, characterized in that The step of adjusting the working mode of the charging circuit according to the voltage level of the charging pile includes: When the voltage of the charging pile is less than the maximum charging voltage of the power battery, controlling the charging circuit to enter a boost charging mode; In the boost charging mode, charging is performed according to the maximum output voltage and maximum output current of the charging pile.

3. The method according to claim 2, characterized in that The first electric drive system includes a first inverter and a first motor, the first inverter is connected to the three-phase coil of the first motor, and the second electric drive system includes a second inverter and a second motor, the second inverter is connected to the three-phase coil of the second motor; The controlling the charging circuit to enter a boost charging mode comprises: Controlling the first switch to close; Controlling the first half bridge of the first inverter to be turned on and the second half bridge to be turned off, and controlling the first half bridge of the second inverter to be turned off and the second half bridge to be turned on, so as to charge the three-phase coil of the first motor and the three-phase coil of the second motor through the charging pile; After the three-phase coil of the first motor and the three-phase coil of the second motor are fully charged, the first half-bridge of the first inverter is controlled to be turned on and the second half-bridge is turned off, and the first half-bridge of the second inverter is controlled to be turned on and the second half-bridge is turned off, so as to charge the power battery through the charging pile, the three-phase coil of the first motor and the three-phase coil of the second motor; The first half bridge and the second half bridge of the second inverter are controlled to be alternately turned on at a set frequency to achieve boost charging.

4. The method according to claim 1, characterized in that The step of adjusting the working mode of the charging circuit according to the voltage level of the charging pile further includes: When the voltage of the charging pile is greater than the maximum charging voltage of the power battery, controlling the charging circuit to enter a step-down charging mode; In the step-down charging mode, the charging method is determined according to the acceptable power of the power battery.

5. The method according to claim 4, characterized in that In the step-down charging mode, determining the charging method according to the acceptable power of the power battery includes: When the acceptable power of the power battery is greater than the maximum output power of the charging pile, the charging pile is requested to output at the maximum power, and the charging circuit is controlled to enter the buck-and-current boost charging mode.

6. The method according to claim 5, characterized in that The first electric drive system includes a first inverter and a first motor, the first inverter is connected to the three-phase coil of the first motor, the second electric drive system includes a second inverter and a second motor, the second inverter is connected to the three-phase coil of the second motor, and the buck-boost charging method includes: Controlling the first switch to close; Controlling the first half bridge of the first inverter to be turned on and the second half bridge to be turned off, and controlling the first half bridge of the second inverter to be turned on and the second half bridge to be turned off, so as to charge the three-phase coils of the first motor and the three-phase coils of the second motor through the charging pile, and to charge the power battery by reducing the voltage and increasing the current; After the three-phase coils of the first motor and the three-phase coils of the second motor are fully charged, the first half-bridge of the first inverter is controlled to be turned off and the second half-bridge is turned on, and the first half-bridge of the second inverter is controlled to be turned on and the second half-bridge is turned off, so as to charge the power battery through the three-phase coils of the first motor and the three-phase coils of the second motor; The first half bridge and the second half bridge of the first inverter are controlled to be turned on alternately at a set frequency to achieve voltage reduction and current increase charging.

7. The method according to claim 5, characterized in that The determining of the charging mode further includes: During the step-down and step-up charging process, obtaining the current acceptable power of the power battery; When the current acceptable power of the power battery is less than the maximum output power of the charging pile, the charging circuit is controlled to enter a direct charging mode, and the charging pile is requested to output a charging voltage according to the current charging voltage of the power battery.

8. The method according to claim 4, characterized in that The step of determining the charging method according to the acceptable power of the power battery in the step-down charging mode further includes: In the step-down charging mode, when the acceptable power of the power battery is less than the maximum output power of the charging pile, the charging circuit is controlled to enter the direct charging mode, and the charging pile is requested to output the charging voltage according to the rated voltage of the power battery.

9. The method according to claim 7 or 8, characterized in that: The charging circuit further includes a second switch and a third switch, wherein the second switch is used to connect the positive electrode of the charging pile and the positive electrode of the power battery, and the third switch is used to connect the negative electrode of the charging pile and the negative electrode of the power battery. The controlling the charging circuit to enter the direct charging mode includes: Controlling all switch tubes of the first electric drive system and the second electric drive system to be cut off; The second switch and the third switch are controlled to be closed, and the charging pile directly charges the power battery through the second switch and the third switch.

10. The method according to any one of claims 1 to 8, characterized in that: The first electric drive system includes: a first inverter and a first motor, and the second electric drive system includes: a second inverter and a second motor; The first ends of the three-phase coils of the first motor are respectively connected to the three-phase bridge arms of the first inverter, the second ends of the three-phase coils of the first motor are connected to the first end of the first switch, the first ends of the three-phase coils of the second motor are respectively connected to the three-phase bridge arms of the second inverter, the second ends of the three-phase coils of the second motor are connected to the second end of the first switch, the first end of the first inverter is connected to the positive electrode of the charging pile, the second end of the first inverter is connected to the negative electrode of the charging pile, the first end of the second inverter is connected to the positive electrode of the power battery, the second end of the second inverter is connected to the negative electrode of the power battery, and the second end of the first inverter is connected to the second end of the second inverter; The first half bridge of the first inverter includes a switch tube connected to the positive electrode of the charging pile, and the second half bridge of the first inverter includes a switch tube connected to the negative electrode of the charging pile; The first half bridge of the second inverter includes a switch tube connected to the positive electrode of the power battery, and the second half bridge of the second inverter includes a switch tube connected to the negative electrode of the power battery.

11. A charging controller, characterized in that: include: processor; a memory for storing processor-executable instructions; The processor is configured to: execute the executable instructions to implement the method according to any one of claims 1 to 10.

12. A vehicle, characterized in that: The charging circuit comprises the charging circuit according to any one of claims 1 to 10 and the charging controller according to claim 11.

13. A computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the program instructions are executed by a processor, the steps of the method according to any one of claims 1 to 10 are implemented.

14. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 10 are implemented.

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