Charging circuit, system and vehicle

Abstract

The utility model relates to a charging circuit, a system and a vehicle. The charging circuit comprises a first electric drive circuit, a first switch and a second electric drive circuit which are connected in sequence. The first electric drive circuit is connected with a charging pile, and the second electric drive circuit is connected with a power battery; the first electric drive circuit is used as a step-down BUCK to charge a power battery under the condition that the output voltage of the charging pile is greater than the rated voltage of the power battery; and the second electric drive circuit is used for charging the power battery as boost BOOST under the condition that the output voltage of the charging pile is smaller than the rated voltage of the power battery. According to the embodiment of the invention, the front-drive circuit and the rear-drive circuit of the electric vehicle can be utilized to self-adapt to the charging voltage of the charging pile to charge the power battery of the electric vehicle.

Description

Technical Field

[0001] This disclosure relates to the field of new energy vehicle technology, and in particular to a charging circuit, system and vehicle. Background Technology

[0002] Currently, with the development of new energy technologies, electric vehicles are being used more and more widely. Electric vehicles are equipped with power batteries, which can receive and store electrical energy provided by charging stations, and release the stored energy during the electric vehicle's operation to drive it.

[0003] To improve the charging speed of electric vehicles, an increasing number of electric vehicles are using 800V high-voltage power batteries. The maximum voltage of a power battery is 800V, but the required charging voltage may exceed 800V. However, most DC fast charging stations on the market currently have an output voltage of 500V or 750V. These charging stations cannot directly charge 800V high-voltage power batteries, causing charging difficulties for electric vehicles equipped with high-voltage power batteries and hindering the user experience. Utility Model Content

[0004] To overcome the problems existing in related technologies, this disclosure provides a charging circuit, system, and vehicle.

[0005] According to a first aspect of the present disclosure, a charging circuit is provided, comprising: a first electric drive circuit, a first switch, and a second electric drive circuit connected in sequence.

[0006] The first electric drive circuit is connected to the charging pile, and the second electric drive circuit is connected to the power battery;

[0007] The first electric drive circuit is used to charge the power battery as a step-down BUCK when the output voltage of the charging pile is greater than the rated voltage of the power battery.

[0008] The second electric drive circuit is used to charge the power battery as a booster when the output voltage of the charging pile is less than the rated voltage of the power battery.

[0009] Optionally, the first electric drive circuit includes: a first inverter circuit and a first energy storage circuit connected to each other;

[0010] The first inverter circuit is used as a switching circuit for the buck converter when the output voltage of the charging pile is greater than the rated voltage of the power battery.

[0011] The first energy storage circuit is used as the step-down BUCK inductor energy storage circuit when the output voltage of the charging pile is greater than the rated voltage of the power battery.

[0012] Optionally, the first inverter circuit includes: a first power transistor, a second power transistor, a third power transistor, a fourth power transistor, a fifth power transistor, and a sixth power transistor;

[0013] The source of the first power transistor is connected to the drain of the second power transistor;

[0014] The source of the third power transistor is connected to the drain of the fourth power transistor;

[0015] The source of the fifth power transistor is connected to the drain of the sixth power transistor;

[0016] The connection point where the drains of the first power transistor, the third power transistor, and the fifth power transistor are connected serves as the first terminal of the first inverter circuit.

[0017] The connection point where the sources of the second power transistor, the fourth power transistor, and the sixth power transistor are connected serves as the second terminal of the first inverter circuit.

[0018] The first terminal of the first inverter circuit is connected to the first terminal of the charging pile, and the second terminal of the first inverter circuit is connected to the second terminal of the charging pile.

[0019] Optionally, the first energy storage circuit includes: a first inductor, a second inductor, and a third inductor connected in parallel;

[0020] The first end of the first inductor is connected to the source of the first power transistor;

[0021] The first terminal of the second inductor is connected to the source of the third power transistor;

[0022] The first end of the third inductor is connected to the source of the fifth power transistor;

[0023] The connection point where the second ends of the first inductor, the second inductor, and the third inductor are connected serves as the output terminal of the first energy storage circuit.

[0024] Optionally, the first energy storage circuit includes the three-phase coils of the first drive motor.

[0025] Optionally, the second electric drive circuit includes: a second inverter circuit and a second energy storage circuit connected to each other;

[0026] The second inverter circuit is used as a switching circuit for the boost converter when the output voltage of the charging pile is less than the rated voltage of the power battery.

[0027] The second energy storage circuit is used as an inductive energy storage circuit for the boost BOOST when the output voltage of the charging pile is less than the rated voltage of the power battery.

[0028] Optionally, the second inverter circuit includes: a seventh power transistor, an eighth power transistor, a ninth power transistor, a tenth power transistor, an eleventh power transistor, and a twelfth power transistor;

[0029] The source of the seventh power transistor is connected to the drain of the eighth power transistor;

[0030] The source of the ninth power transistor is connected to the drain of the tenth power transistor;

[0031] The source of the eleventh power transistor is connected to the drain of the twelfth power transistor;

[0032] The connection point where the drains of the seventh power transistor, the ninth power transistor, and the eleventh power transistor are connected serves as the first terminal of the second inverter circuit.

[0033] The connection point where the sources of the eighth power transistor, the tenth power transistor, and the twelfth power transistor are connected serves as the second terminal of the second inverter circuit, and the second terminal of the second inverter circuit is connected to the second terminal of the first inverter of the first electric drive circuit.

[0034] The first terminal of the second inverter circuit is connected to the positive terminal of the power battery, and the second terminal of the second inverter circuit is connected to the negative terminal of the power battery.

[0035] Optionally, the second energy storage circuit includes: a fourth inductor, a fifth inductor, and a sixth inductor connected in parallel;

[0036] The first end of the fourth inductor is connected to the source of the seventh power transistor;

[0037] The first terminal of the fifth inductor is connected to the source of the ninth power transistor;

[0038] The first terminal of the sixth inductor is connected to the source of the eleventh power transistor;

[0039] The connection point where the second ends of the fourth, fifth, and sixth inductors are connected serves as the input terminal of the second energy storage circuit.

[0040] Optionally, the second energy storage circuit includes the three-phase coils of the second drive motor.

[0041] Optionally, the charging circuit further includes: a second switch and a third switch;

[0042] The first end of the second switch is connected to the first end of the charging pile, and the second end of the second switch is connected to the positive terminal of the power battery;

[0043] The first end of the third switch is connected to the second end of the charging pile, and the second end of the second switch is connected to the negative terminal of the power battery.

[0044] The second switch and the third switch are used as direct charging channels for the power battery to be directly charged by the charging pile.

[0045] Optionally, the charging circuit further includes: a fourth switch, a fifth switch, a sixth switch, a seventh switch, and a first resistor;

[0046] The first end of the fourth switch is connected to the first end of the charging pile, and the second end of the fourth switch is connected to the first end of the first electric drive circuit.

[0047] The first end of the fifth switch is connected to the positive terminal of the power battery, and the second end of the fifth switch is connected to the first end of the second electric drive circuit.

[0048] The first end of the sixth switch is connected to the negative terminal of the power battery, and the second end of the sixth switch is connected to the second end of the second electric drive circuit.

[0049] The first end of the seventh switch is connected to the first end of the second electric drive circuit, the second end of the seventh switch is connected to the first end of the first resistor, and the second end of the first resistor is connected to the positive terminal of the power battery.

[0050] Optionally, the charging circuit further includes: a first filter capacitor and a second filter capacitor;

[0051] The first end of the first filter capacitor is connected to the first end of the first electric drive circuit, and the second end of the first filter capacitor is connected to the second end of the first electric drive circuit.

[0052] The first end of the second filter capacitor is connected to the first end of the second electric drive circuit, and the second end of the second filter capacitor is connected to the second end of the second electric drive circuit.

[0053] According to a second aspect of the present disclosure, a charging system is provided, including the charging circuit and charging pile described in any of the first aspects.

[0054] According to a third aspect of the present disclosure, a vehicle is provided, including any of the charging circuits described in the first aspect.

[0055] In summary, this disclosure provides a charging circuit, including: a first electric drive circuit, a first switch, and a second electric drive circuit connected in sequence; the first electric drive circuit is connected to a charging pile, and the second electric drive circuit is connected to a power battery; the first electric drive circuit is used to charge the power battery as a step-down BUCK when the output voltage of the charging pile is greater than the rated voltage of the power battery; the second electric drive circuit is used to charge the power battery as a boost BOOST when the output voltage of the charging pile is less than the rated voltage of the power battery. This disclosure enables the electric vehicle's power battery to be charged using the adaptive charging voltage of the charging pile through the front-drive and rear-drive circuits of the electric vehicle.

[0056] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0057] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0058] Figure 1 This is a schematic diagram of a charging circuit according to an exemplary embodiment.

[0059] Figure 2 This is a schematic diagram of a charging circuit according to an exemplary embodiment.

[0060] Figure 3 This is a block diagram illustrating a charging system according to an exemplary embodiment.

[0061] Figure 4 This is a block diagram illustrating a vehicle according to an exemplary embodiment. Detailed Implementation

[0062] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0063] It should be understood that the term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based 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". Definitions of other terms will be given in the following description.

[0064] It should be noted that the concepts of "first," "second," etc., mentioned in this disclosure are used only to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies. The modifiers "a" and "a plurality of" mentioned in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless explicitly stated in the context, they should be understood as "one or more." In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more, and other quantifiers are similar; "at least one," "one or more," or similar expressions refer to any combination of these items, including any combination of single or multiple items.

[0065] Although operations or steps are described in a specific order in the accompanying drawings in the embodiments of this disclosure, it should not be construed as requiring these operations or steps to be performed in the specific order or serial order shown, or requiring all of the shown operations or steps to be performed to obtain the desired result. In the embodiments of this disclosure, these operations or steps may be performed serially; they may be performed in parallel; or a portion of these operations or steps may be performed.

[0066] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of these messages or information. It is understood that before using the technical solutions disclosed in the embodiments of this disclosure, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in this disclosure in an appropriate manner in accordance with relevant laws and regulations, and user authorization should be obtained.

[0067] First, the application scenarios of this disclosure will be explained. Currently, there are three mainstream charging pile voltage platforms on the market: 500V, 750V, and 1000V. Among them, 750V charging piles dominate the market, 1000V charging piles are becoming the future growth point, and the number of older 500V charging piles is gradually decreasing, but there is still a certain amount in stock. Based on the development trend of public charging piles, some vehicle manufacturers design their battery voltage to be lower than the highest 750V platform voltage, making compatibility with low-voltage charging piles (older 500V charging piles) a major issue. The following will explain this disclosure with specific embodiments.

[0068] Figure 1 This is a schematic diagram illustrating a charging circuit according to an exemplary embodiment. For example... Figure 1 As shown, this embodiment of the present disclosure provides a charging circuit 100, including: a first electric drive circuit 101, a first switch K1, and a second electric drive circuit 102 connected in sequence.

[0069] The first electric drive circuit 101 is connected to the charging pile 200, and the second electric drive circuit 102 is connected to the power battery 300. The first electric drive circuit 101 is used to charge the power battery 300 as a step-down circuit when the output voltage of the charging pile 200 is greater than the rated voltage of the power battery 300. The second electric drive circuit 102 is used to charge the power battery 300 as a boost circuit when the output voltage of the charging pile 200 is less than the rated voltage of the power battery 300.

[0070] For example, when the output voltage of the charging pile 200 is greater than the rated voltage of the power battery 300, the voltage for charging the power battery 300 can be reduced through the energy storage circuit of the first electric drive circuit 101, thereby achieving step-down charging; when the output voltage of the charging pile 200 is less than the rated voltage of the power battery 300, the voltage for charging the power battery 300 can be increased through the energy storage circuit of the second electric drive circuit 102, thereby achieving step-up charging. The first electric drive circuit 101 can reuse the front-drive circuit of the electric vehicle, and the second electric drive circuit 102 can reuse the rear-drive circuit of the electric vehicle, thus reducing hardware costs.

[0071] In summary, this disclosure provides a charging circuit, including: a first electric drive circuit, a first switch, and a second electric drive circuit connected in sequence; the first electric drive circuit is connected to a charging pile, and the second electric drive circuit is connected to a power battery; the first electric drive circuit is used to charge the power battery as a step-down BUCK when the output voltage of the charging pile is greater than the rated voltage of the power battery; the second electric drive circuit is used to charge the power battery as a boost BOOST when the output voltage of the charging pile is less than the rated voltage of the power battery. This disclosure enables the electric vehicle's power battery to be charged using the adaptive charging voltage of the charging pile through the front-drive and rear-drive circuits of the electric vehicle.

[0072] Figure 2 This is a schematic diagram illustrating a charging circuit according to an exemplary embodiment. For example... Figure 2 As shown, the first electric drive circuit 101 includes a first inverter circuit 1011 and a first energy storage circuit 1012 that are interconnected.

[0073] The first inverter circuit 1011 is used as a switching circuit for step-down BUCK when the output voltage of the charging pile 200 is greater than the rated voltage of the power battery 300.

[0074] The first energy storage circuit 1012 is used as a step-down BUCK inductor energy storage circuit when the output voltage of the charging pile 200 is greater than the rated voltage of the power battery 300.

[0075] In some embodiments, the first inverter circuit 1011 includes: a first power transistor Q11, a second power transistor Q12, a third power transistor Q13, a fourth power transistor Q14, a fifth power transistor Q15, and a sixth power transistor Q16.

[0076] The source of the first power transistor Q11 is connected to the drain of the second power transistor Q12. The source of the third power transistor Q13 is connected to the drain of the fourth power transistor Q14. The source of the fifth power transistor Q15 is connected to the drain of the sixth power transistor Q16.

[0077] The connection point where the drains of the first power transistor Q11, the third power transistor Q13, and the fifth power transistor Q15 are connected serves as the first terminal of the first inverter circuit 1011. The connection point where the sources of the second power transistor Q12, the fourth power transistor Q14, and the sixth power transistor Q16 are connected serves as the second terminal of the first inverter circuit 1011. The first terminal of the first inverter circuit 1011 is connected to the first terminal of the charging pile 200, and the second terminal of the first inverter circuit 1011 is connected to the second terminal of the charging pile 200.

[0078] In some embodiments, the power transistor can be a MOSFET or an IGBT, and this disclosure does not limit the application.

[0079] In some embodiments, the first energy storage circuit 1012 includes: a first inductor L11, a second inductor L12, and a third inductor L13 connected in parallel.

[0080] The first terminal of the first inductor L11 is connected to the source of the first power transistor Q11. The first terminal of the second inductor L12 is connected to the source of the third power transistor Q13. The first terminal of the third inductor L13 is connected to the source of the fifth power transistor Q15.

[0081] The connection point where the second ends of the first inductor L11, the second inductor L12 and the third inductor L13 are connected serves as the output terminal of the first energy storage circuit 1012.

[0082] In some embodiments, the first energy storage circuit 1012 includes the three-phase coils of the first drive motor. This allows the three-phase coils of the electric vehicle's drive motor to be reused for energy storage, helping to reduce costs.

[0083] In some embodiments, the second electric drive circuit 102 includes: a second inverter circuit 1021 and a second energy storage circuit 1022 connected to each other.

[0084] The second inverter circuit 1021 is used as a switching circuit for boosting when the output voltage of the charging pile 200 is less than the rated voltage of the power battery 300.

[0085] The second energy storage circuit 1022 is used as an inductive energy storage circuit for boosting when the output voltage of the charging pile 200 is less than the rated voltage of the power battery 300.

[0086] In some embodiments, the second inverter circuit 1021 includes: a seventh power transistor Q21, an eighth power transistor Q22, a ninth power transistor Q23, a tenth power transistor Q24, an eleventh power transistor Q25, and a twelfth power transistor Q26.

[0087] The source of the seventh power transistor Q21 is connected to the drain of the eighth power transistor Q22. The source of the ninth power transistor Q23 is connected to the drain of the tenth power transistor Q24. The source of the eleventh power transistor Q25 is connected to the drain of the twelfth power transistor Q26.

[0088] The connection point where the drains of the seventh power transistor Q21, the ninth power transistor Q23, and the eleventh power transistor Q25 are connected serves as the first terminal of the second inverter circuit 1021. The connection point where the sources of the eighth power transistor Q22, the tenth power transistor Q24, and the twelfth power transistor Q26 are connected serves as the second terminal of the second inverter circuit 1021, and the second terminal of the second inverter circuit 1021 is connected to the second terminal of the first inverter of the first electric drive circuit 101.

[0089] The first terminal of the second inverter circuit 1021 is connected to the positive terminal of the power battery 300, and the second terminal of the second inverter circuit 1021 is connected to the negative terminal of the power battery 300.

[0090] In some embodiments, the power transistor can be a MOSFET or an IGBT, and this disclosure does not limit the application.

[0091] In some embodiments, the second energy storage circuit 1022 includes a fourth inductor L21, a fifth inductor L22, and a sixth inductor L23 connected in parallel.

[0092] The first terminal of the fourth inductor L21 is connected to the source of the seventh power transistor Q21. The first terminal of the fifth inductor L22 is connected to the source of the ninth power transistor Q23. The first terminal of the sixth inductor L23 is connected to the source of the eleventh power transistor Q25. The connection point where the second terminals of the fourth inductor L21, the fifth inductor L22, and the sixth inductor L23 are connected serves as the input terminal of the second energy storage circuit 1022.

[0093] The working principle of charging circuit 100 is as follows:

[0094] When the output voltage of the charging pile 200 is greater than the rated voltage of the power battery 300, the first power transistor Q11, the third power transistor Q13, and the fifth power transistor Q15 of the first inverter circuit 1011 are in the on state, the second power transistor Q12, the fourth power transistor Q14, and the sixth power transistor Q16 are in the off state, the first switch K1 is in the closed state, the seventh power transistor Q21, the ninth power transistor Q23, and the eleventh power transistor Q25 of the second inverter circuit 1021 are in the off state, and the eighth power transistor Q22, the tenth power transistor Q24, and the twelfth power transistor Q26 are in the on state. At this time, the charging pile 200 charges the first inductor L11, the second inductor L12, and the third inductor L13 connected in parallel with the first energy storage circuit 1012, and the fourth inductor L21, the fifth inductor L22, and the sixth inductor L23 connected in parallel with the second energy storage circuit 1022 through the upper half bridge of the first inverter circuit 1011 and the lower half bridge of the second inverter circuit 1021.

[0095] After charging is complete, the first power transistor Q11, the third power transistor Q13, and the fifth power transistor Q15 of the first inverter circuit 1011 are in the off state, the second power transistor Q12, the fourth power transistor Q14, and the sixth power transistor Q16 are in the on state, and the first switch K1 is in the closed state. The seventh power transistor Q21, the ninth power transistor Q23, and the eleventh power transistor Q25 of the second inverter circuit 1021 are in the on state, and the eighth power transistor Q22, the tenth power transistor Q24, and the twelfth power transistor Q26 are in the off state. At this time, the first energy storage circuit 1012 and the second energy storage circuit 1022 charge the power battery 300 through the upper half bridge of the second inverter circuit 1021 and the lower half bridge of the first inverter circuit 1011, thereby realizing step-down charging.

[0096] The above process can be repeated to reduce the charge of the 300 power battery.

[0097] When the output voltage of the charging pile 200 is less than the rated voltage of the power battery 300, the first power transistor Q11, the third power transistor Q13, and the fifth power transistor Q15 of the first inverter circuit 1011 are in the on state, the second power transistor Q12, the fourth power transistor Q14, and the sixth power transistor Q16 are in the off state, the first switch K1 is in the closed state, the seventh power transistor Q21, the ninth power transistor Q23, and the eleventh power transistor Q25 of the second inverter circuit 1021 are in the off state, and the eighth power transistor Q22, the tenth power transistor Q24, and the twelfth power transistor Q26 are in the on state. At this time, the charging pile 200 charges the first inductor L11, the second inductor L12, and the third inductor L13 connected in parallel with the first energy storage circuit 1012, and the fourth inductor L21, the fifth inductor L22, and the sixth inductor L23 connected in parallel with the second energy storage circuit 1022 through the upper half bridge of the first inverter circuit 1011 and the lower half bridge of the second inverter circuit 1021.

[0098] After charging is complete, the switching state of the first inverter circuit 1011 remains unchanged, the first switch K1 is in the closed state, the seventh power transistor Q21, the ninth power transistor Q23, and the eleventh power transistor Q25 of the second inverter circuit 1021 are in the conducting state, and the eighth power transistor Q22, the tenth power transistor Q24, and the twelfth power transistor Q26 are in the open state. At this time, the charging pile 200, the first energy storage circuit 1012, and the second energy storage circuit 1022 simultaneously charge the power battery 300 through the upper half bridge of the first inverter circuit 1011 and the upper half bridge of the second inverter circuit 1021, thereby realizing boost charging.

[0099] The above process can be repeated to achieve boost charging of the 300 power battery.

[0100] In some embodiments, the second energy storage circuit 1022 includes the three-phase coils of the second drive motor. This allows the three-phase coils of the electric vehicle's drive motor to be reused for energy storage, helping to reduce costs.

[0101] In some embodiments, the charging circuit 100 further includes a second switch K2 and a third switch K3.

[0102] The first end of the second switch K2 is connected to the first end of the charging pile 200, and the second end of the second switch K2 is connected to the positive terminal of the power battery 300. The first end of the third switch K3 is connected to the second end of the charging pile 200, and the second end of the second switch K2 is connected to the negative terminal of the power battery 300. The second switch K2 and the third switch K3 are used as a direct charging channel for the charging pile 200 to directly charge the power battery 300. For example, when the first switch K1 is in the open state and both the second switch K2 and the third switch K3 are in the closed state, the charging pile 200 can directly charge the power battery 300.

[0103] In some embodiments, the charging circuit 100 further includes: a fourth switch K4, a fifth switch K5, a sixth switch K6, a seventh switch K7, and a first resistor R1.

[0104] The first terminal of the fourth switch K4 is connected to the first terminal of the charging pile 200, and the second terminal of the fourth switch K4 is connected to the first terminal of the first electric drive circuit 101. The first terminal of the fifth switch K5 is connected to the positive terminal of the power battery 300, and the second terminal of the fifth switch K5 is connected to the first terminal of the second electric drive circuit 102. The first terminal of the sixth switch K6 is connected to the negative terminal of the power battery 300, and the second terminal of the sixth switch K6 is connected to the second terminal of the second electric drive circuit 102. The first terminal of the seventh switch K7 is connected to the first terminal of the second electric drive circuit 102, and the second terminal of the seventh switch K7 is connected to the first terminal of the first resistor R1. The second terminal of the first resistor R1 is connected to the positive terminal of the power battery 300.

[0105] For example, the seventh switch K7 and the first resistor R1 form a pre-charging circuit. When the first switch K1 and the fifth switch K5 are in the open state, and the second switch K2, the third switch K3, the sixth switch K6 and the seventh switch K7 are all in the closed state, the charging pile 200 can pre-charge the power battery 300 through the first resistor R1.

[0106] In some embodiments, the charging circuit 100 further includes a first filter capacitor C1 and a second filter capacitor C2.

[0107] The first terminal of the first filter capacitor C1 is connected to the first terminal of the first electric drive circuit 101, and the second terminal of the first filter capacitor C1 is connected to the second terminal of the first electric drive circuit 101. The first terminal of the second filter capacitor C2 is connected to the first terminal of the second electric drive circuit 102, and the second terminal of the second filter capacitor C2 is connected to the second terminal of the second electric drive circuit 102. This reduces power supply ripple and improves the stability of the charging voltage.

[0108] Figure 3 This is a block diagram illustrating a charging system according to an exemplary embodiment. Figure 3 As shown, this embodiment of the present disclosure provides a charging system 300, including a charging circuit 100 and a charging pile 200.

[0109] Figure 4 This is a block diagram illustrating a vehicle according to an exemplary embodiment. (Refer to...) Figure 4 The vehicle 400 may include a charging circuit 100 and various subsystems, such as an infotainment system 410, a perception system 420, a decision control system 430, a drive system 440, and a computing platform 450. The vehicle 400 may also include more or fewer subsystems, and each subsystem may include multiple components. Furthermore, each subsystem and component of the vehicle 400 can be interconnected via wired or wireless means.

[0110] In some embodiments, the infotainment system 410 may include a communication system, an entertainment system, and a navigation system, etc.

[0111] The perception system 420 may include several sensors for sensing information about the environment surrounding the vehicle 400. For example, the perception system 420 may include a global positioning system (which may be GPS, BeiDou, or other positioning systems), an inertial measurement unit (IMU), lidar, millimeter-wave radar, ultrasonic radar, and a camera device.

[0112] The decision control system 430 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0113] The drive system 440 may include components that provide powered motion to the vehicle 400. In one embodiment, the drive system 440 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of internal combustion engines, electric motors, and compressed air engines. The engine is capable of converting energy provided by the energy source into mechanical energy.

[0114] Some or all of the functions of the vehicle 400 are controlled by a computing platform 450. The computing platform 450 may include at least one processor 451 and a memory 452, the processor 451 being able to execute instructions 453 stored in the memory 452.

[0115] Processor 451 can be any conventional processor, such as a commercially available CPU. The processor may also include, for example, a Graphics Processing Unit (GPU), a Field Programmable Gate Array (FPGA), a System on Chip (SOC), an Application Specific Integrated Circuit (ASIC), or a combination thereof.

[0116] The memory 452 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.

[0117] In addition to instruction 453, memory 452 can also store data, such as road maps, route information, vehicle position, direction, speed, and other data. The data stored in memory 452 can be used by computing platform 450.

[0118] In this embodiment of the disclosure, processor 451 may execute instruction 453.

[0119] In another exemplary embodiment, a computer program product is also provided, the computer program product comprising a computer program executable by a programmable device, the computer program having characteristics when executed by the programmable device.

[0120] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0121] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A charging circuit, characterized in that, include: The first electric drive circuit, the first switch, and the second electric drive circuit are connected in sequence. The first electric drive circuit is connected to the charging pile, and the second electric drive circuit is connected to the power battery; The first electric drive circuit is used to charge the power battery as a step-down BUCK when the output voltage of the charging pile is greater than the rated voltage of the power battery. The second electric drive circuit is used to charge the power battery as a booster when the output voltage of the charging pile is less than the rated voltage of the power battery.

2. The charging circuit according to claim 1, characterized in that, The first electric drive circuit includes: a first inverter circuit and a first energy storage circuit connected to each other; The first inverter circuit is used as a switching circuit for the buck converter when the output voltage of the charging pile is greater than the rated voltage of the power battery. The first energy storage circuit is used as the step-down BUCK inductor energy storage circuit when the output voltage of the charging pile is greater than the rated voltage of the power battery.

3. The charging circuit according to claim 2, characterized in that, The first inverter circuit includes: a first power transistor, a second power transistor, a third power transistor, a fourth power transistor, a fifth power transistor, and a sixth power transistor; The source of the first power transistor is connected to the drain of the second power transistor; The source of the third power transistor is connected to the drain of the fourth power transistor; The source of the fifth power transistor is connected to the drain of the sixth power transistor; The connection point where the drains of the first power transistor, the third power transistor, and the fifth power transistor are connected serves as the first terminal of the first inverter circuit. The connection point where the sources of the second power transistor, the fourth power transistor, and the sixth power transistor are connected serves as the second terminal of the first inverter circuit. The first terminal of the first inverter circuit is connected to the first terminal of the charging pile, and the second terminal of the first inverter circuit is connected to the second terminal of the charging pile.

4. The charging circuit according to claim 3, characterized in that, The first energy storage circuit includes: a first inductor, a second inductor, and a third inductor connected in parallel; The first end of the first inductor is connected to the source of the first power transistor; The first end of the second inductor is connected to the source of the third power transistor; The first end of the third inductor is connected to the source of the fifth power transistor; The connection point where the second ends of the first inductor, the second inductor, and the third inductor are connected serves as the output terminal of the first energy storage circuit.

5. The charging circuit according to any one of claims 2-4, characterized in that, The first energy storage circuit includes the three-phase coils of the first drive motor.

6. The charging circuit according to claim 1, characterized in that, The second electric drive circuit includes: a second inverter circuit and a second energy storage circuit that are interconnected. The second inverter circuit is used as a switching circuit for the boost converter when the output voltage of the charging pile is less than the rated voltage of the power battery. The second energy storage circuit is used as an inductive energy storage circuit for the boost BOOST when the output voltage of the charging pile is less than the rated voltage of the power battery.

7. The charging circuit according to claim 6, characterized in that, The second inverter circuit includes: a seventh power transistor, an eighth power transistor, a ninth power transistor, a tenth power transistor, an eleventh power transistor, and a twelfth power transistor; The source of the seventh power transistor is connected to the drain of the eighth power transistor; The source of the ninth power transistor is connected to the drain of the tenth power transistor; The source of the eleventh power transistor is connected to the drain of the twelfth power transistor; The connection point where the drains of the seventh power transistor, the ninth power transistor, and the eleventh power transistor are connected serves as the first terminal of the second inverter circuit. The connection point where the sources of the eighth power transistor, the tenth power transistor, and the twelfth power transistor are connected serves as the second terminal of the second inverter circuit, and the second terminal of the second inverter circuit is connected to the second terminal of the first inverter of the first electric drive circuit. The first terminal of the second inverter circuit is connected to the positive terminal of the power battery, and the second terminal of the second inverter circuit is connected to the negative terminal of the power battery.

8. The charging circuit according to claim 7, characterized in that, The second energy storage circuit includes: a fourth inductor, a fifth inductor, and a sixth inductor connected in parallel; The first end of the fourth inductor is connected to the source of the seventh power transistor; The first terminal of the fifth inductor is connected to the source of the ninth power transistor; The first terminal of the sixth inductor is connected to the source of the eleventh power transistor; The connection point where the second ends of the fourth, fifth, and sixth inductors are connected serves as the input terminal of the second energy storage circuit.

9. The charging circuit according to any one of claims 6-8, characterized in that, The second energy storage circuit includes the three-phase coils of the second drive motor.

10. The charging circuit according to claim 1, characterized in that, The charging circuit also includes: a second switch and a third switch; The first end of the second switch is connected to the first end of the charging pile, and the second end of the second switch is connected to the positive terminal of the power battery; The first end of the third switch is connected to the second end of the charging pile, and the second end of the second switch is connected to the negative terminal of the power battery. The second switch and the third switch are used as direct charging channels for the power battery to be directly charged by the charging pile.

11. The charging circuit according to claim 1, characterized in that, The charging circuit also includes: a fourth switch, a fifth switch, a sixth switch, a seventh switch, and a first resistor; The first end of the fourth switch is connected to the first end of the charging pile, and the second end of the fourth switch is connected to the first end of the first electric drive circuit. The first end of the fifth switch is connected to the positive terminal of the power battery, and the second end of the fifth switch is connected to the first end of the second electric drive circuit. The first end of the sixth switch is connected to the negative terminal of the power battery, and the second end of the sixth switch is connected to the second end of the second electric drive circuit. The first end of the seventh switch is connected to the first end of the second electric drive circuit, the second end of the seventh switch is connected to the first end of the first resistor, and the second end of the first resistor is connected to the positive terminal of the power battery.

12. The charging circuit according to claim 1, characterized in that, The charging circuit further includes: a first filter capacitor and a second filter capacitor; The first end of the first filter capacitor is connected to the first end of the first electric drive circuit, and the second end of the first filter capacitor is connected to the second end of the first electric drive circuit. The first end of the second filter capacitor is connected to the first end of the second electric drive circuit, and the second end of the second filter capacitor is connected to the second end of the second electric drive circuit.

13. A charging system, characterized in that, Includes the charging circuit and charging pile as described in any one of claims 1-12.

14. A vehicle, characterized in that, Includes the charging circuit described in any one of claims 1-12.

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