Charging system for vehicle

Abstract

The utility model discloses a charging system of a vehicle. The utility model relates to the field of vehicles, which comprises a driving motor, a first end of the driving motor is connected with a positive electrode of a battery pack in the vehicle, and a second end of the driving motor is connected with a negative electrode of the battery pack; the first end of the charging interface is connected with the first end of the driving motor, and the second end of the charging interface is connected with the third end of the driving motor; and the controller is connected with the driving motor, and is used for determining the boost voltage of the driving motor according to the first voltage of the battery pack and the second voltage of the charging pile under the condition that the charging interface is connected with the charging pile, and charging the battery pack based on the boost voltage and the second voltage. According to the utility model, the technical problem that the compatibility between the charging pile and the vehicle is low because the output voltage of the charging pile is not matched with the voltage required by the vehicle battery pack is solved.

Description

Technical Field

[0001] The utility model relates to the field of vehicles, and in particular to a charging system for a vehicle. Background Art

[0002] With the rapid development of new energy vehicles, charging piles for replenishing vehicle power have appeared in more and more parking lots or parking spaces. As the demand for charging piles increases, different brands of charging piles have appeared on the market, and the voltages of charging piles of different brands vary. However, as vehicles gradually move towards higher voltages, more and more charging piles with lower voltages are unable to meet the charging voltage requirements of vehicles with higher charging voltages. Therefore, improving the compatibility between vehicles and charging piles has become a problem that the automotive industry must face. However, the output voltage of the charging pile in related technologies does not match the voltage required by the vehicle battery pack, resulting in low compatibility between the charging pile and the vehicle.

[0003] To address the above-mentioned problems, no effective solutions have been proposed so far. Utility Model Content

[0004] An embodiment of the present utility model provides a vehicle charging system to at least solve the technical problem of low compatibility between the charging pile and the vehicle caused by the mismatch between the output voltage of the charging pile and the voltage required by the vehicle battery pack.

[0005] According to one aspect of an embodiment of the present utility model, a charging system for a vehicle is provided, comprising: a drive motor, wherein a first end of the drive motor is connected to a positive electrode of a battery pack in the vehicle, and a second end of the drive motor is connected to a negative electrode of the battery pack; a charging interface, wherein a first end of the charging interface is connected to a first end of the drive motor, and a second end of the charging interface is connected to a third end of the drive motor; and a controller connected to the drive motor, for determining a boost voltage of the drive motor according to a first voltage of the battery pack and a second voltage of the charging pile when the charging interface is connected to a charging pile, and charging the battery pack based on the boost voltage and the second voltage.

[0006] Furthermore, the vehicle's charging system also includes: a first inductor, a first end of the first inductor is connected to the third end of the drive motor, and a second end of the first inductor is connected to the second end of the charging interface; a controller is connected to the drive motor, and is used to determine the boost voltage of the drive motor according to the first voltage of the battery pack and the second voltage of the charging pile when the charging interface is connected to the charging pile, boost the first inductor based on the boost voltage to obtain the third voltage of the first inductor, and charge the battery pack based on the boost voltage, the third voltage and the second voltage.

[0007] Furthermore, the driving motor includes: a driver, a first end of the driver is connected to the first end of the driving motor, and a second end of the driver is connected to the second end of the driving motor; a motor, a first end of the motor is connected to the third end of the driver, and a second end of the motor is connected to the third end of the driving motor; a controller, connected to the driver, for determining control parameters of the driver according to the boost voltage, and controlling the driver to boost to the boost voltage based on the control parameters.

[0008] Furthermore, the driver includes: at least one field effect transistor group, the field effect transistor group includes a first field effect transistor and a second field effect transistor, the first end of the first field effect transistor is connected to the first end of the driver, the second end of the second field effect transistor is connected to the second end of the driver, and the second end of the first field effect transistor and the first end of the second field effect transistor are connected to the third end of the driver.

[0009] Furthermore, the above-mentioned motor includes: at least one second inductor, the first end of the second inductor is connected to the first interface in the third end of the driver, the first interface is the interface in the third end of the driver to which the field effect transistor group corresponding to the second inductor is connected, and the second end of the second inductor is connected to the third end of the drive motor; the controller is connected to the at least one field effect transistor group, and is used to control the switching state of the at least one field effect transistor group according to the control parameters, so that the driver boosts the inductor voltage of the at least one second inductor to the boost voltage, so as to charge the battery pack through the first inductor based on the boost voltage and the second voltage.

[0010] Furthermore, the charging system of the above-mentioned vehicle also includes: a first switch, arranged between the drive motor and the battery pack; a second switch, arranged between the drive motor and the charging interface; a third switch, arranged between the third end of the drive motor and the second switch; a fourth switch, arranged between the second end of the drive motor and the second switch; a controller, connected to the first switch, the second switch, the third switch and the fourth switch, in response to the boost voltage being a preset value, closing the first switch, the second switch and the fourth switch, opening the third switch, and charging the battery pack based on the second voltage.

[0011] Furthermore, the controller is also used to close the first switch, the second switch and the third switch in response to a non-preset value of the boost voltage, open the fourth switch, boost the first inductor based on the boost voltage to obtain a third voltage, and charge the battery pack based on the third voltage and the second voltage.

[0012] Furthermore, the first field effect transistor includes a first sub-field effect transistor, a second sub-field effect transistor, and a third sub-field effect transistor, the second field effect transistor includes a fourth sub-field effect transistor, a fifth sub-field effect transistor, and a sixth sub-field effect transistor, and at least one field effect transistor group includes: a first field effect transistor group including a first sub-field effect transistor and a fourth sub-field effect transistor, a first end of the first sub-field effect transistor being connected to a first end of the driver, a second end of the fourth sub-field effect transistor being connected to a second end of the driver, and the second end of the first sub-field effect transistor and the first end of the fourth sub-field effect transistor being connected to a third end of the driver; a second field effect transistor group , including a second sub-field effect transistor and a fifth sub-field effect transistor, the first end of the second sub-field effect transistor is connected to the first end of the driver, the second end of the fifth sub-field effect transistor is connected to the second end of the driver, and the second end of the second sub-field effect transistor and the first end of the fifth sub-field effect transistor are connected to the third end of the driver; the third field effect transistor group includes a third sub-field effect transistor and a sixth sub-field effect transistor, the first end of the third sub-field effect transistor is connected to the first end of the driver, the second end of the sixth sub-field effect transistor is connected to the second end of the driver, and the second end of the third sub-field effect transistor and the first end of the sixth sub-field effect transistor are connected to the third end of the driver.

[0013] Furthermore, the at least one second inductor includes: a first sub-inductor, wherein the first end of the first sub-inductor is connected to the second end of the first sub-field effect transistor, or the first end of the first sub-inductor is connected to the first end of the fourth sub-field effect transistor, and the second end of the first sub-inductor is connected to the third end of the drive motor; a second sub-inductor, wherein the first end of the second sub-inductor is connected to the second end of the second sub-field effect transistor, or the first end of the second sub-inductor is connected to the first end of the fifth sub-field effect transistor, and the second end of the second sub-inductor is connected to the third end of the drive motor; and a third sub-inductor, wherein the first end of the third sub-inductor is connected to the second end of the third sub-field effect transistor, or the first end of the third sub-inductor is connected to the first end of the sixth sub-field effect transistor, and the second end of the second sub-inductor is connected to the third end of the drive motor.

[0014] According to another aspect of an embodiment of the present invention, a vehicle is provided, including: the charging system of the above-mentioned vehicle.

[0015] In an embodiment of the present invention, the charging system provided by the present invention includes: a drive motor, a first end of the drive motor is connected to the positive pole of the battery pack in the vehicle, and a second end of the drive motor is connected to the negative pole of the battery pack; a charging interface, a first end of the charging interface is connected to the first end of the drive motor, and a second end of the charging interface is connected to the third end of the drive motor; and a controller is connected to the drive motor. The utility model controls the voltage on the vehicle battery pack by changing the voltage on the inductor inside the motor, so that the sum of the boost voltage on the drive motor and the second voltage of the charging pile meets the voltage requirement of the vehicle battery pack, and thus there is no need to additionally set up a boost and buck module to adjust the voltage of the charging pile, which effectively reduces the cost of the vehicle charging system and reduces the volume of the vehicle charging system; the utility model also sets a drive motor and a controller between the vehicle battery pack and the charging interface, so that the battery pack can be charged based on the boost voltage and the second voltage of the charging pile, that is, the drive motor can be controlled by the controller to boost the voltage of the charging pile to the voltage required by the vehicle battery pack, thereby achieving the purpose of matching the output voltage with the voltage required by the vehicle battery pack, thereby realizing the technical effect of improving the compatibility of the charging pile and the vehicle, and thus solving the technical problem of low compatibility between the charging pile and the vehicle caused by the mismatch between the output voltage of the charging pile and the voltage required by the vehicle battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 is a schematic structural diagram of an optional vehicle charging system according to an embodiment of the present utility model;

[0018] Figure 2 It is a structural schematic diagram of a preferred vehicle charging system according to an embodiment of the present utility model.

[0019] Among them, the above-mentioned drawings include the following figure marks: 1. battery pack; 2. drive motor; 3. charging interface; 4. controller; 5. first inductor; 11. positive switch; 12. negative switch; 21. first sub-field effect transistor; 22. second sub-field effect transistor; 23. third sub-field effect transistor; 24. fourth sub-field effect transistor; 25. fifth sub-field effect transistor; 26. sixth sub-field effect transistor; 27. first capacitor; 28. motor; 281. first sub-inductor; 282. second sub-inductor; 283. third sub-inductor; 31. first sub-switch; 32. second sub-switch; 33. third sub-switch; 34. fourth sub-switch; 35. fifth sub-switch; 36. second capacitor. DETAILED DESCRIPTION

[0020] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0021] It should be noted that the terms "first," "second," and the like in the specification and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the numbers used in this manner are interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a system, product, or device comprising a series of units is not necessarily limited to those units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these products or devices.

[0022] According to an embodiment of the present invention, a vehicle charging system is provided. Figure 1 is a schematic structural diagram of an optional vehicle charging system according to an embodiment of the present utility model, such as Figure 1 As shown, the system includes:

[0023] A driving motor 2, wherein the first end of the driving motor 2 is connected to the positive electrode of the battery pack 1 in the vehicle, and the second end of the driving motor 2 is connected to the negative electrode of the battery pack 1; a charging interface, wherein the first end of the charging interface is connected to the first end of the driving motor, and the second end of the charging interface 3 is connected to the third end of the driving motor 2; a controller 4, connected to the driving motor 2, for determining the boost voltage of the driving motor 2 according to the first voltage of the battery pack 1 and the second voltage of the charging pile when the charging interface 3 is connected to the charging pile, and charging the battery pack 1 based on the boost voltage and the second voltage.

[0024] The above-mentioned vehicles refer to vehicles that need to be charged through charging piles, especially new energy vehicles, including but not limited to: electric cars, electric trucks, electric vans, hybrid cars, hybrid trucks, hybrid vans, etc.

[0025] The above-mentioned drive motor refers to a device used to provide power to the vehicle. In this application, the drive motor can not only provide power to the vehicle, but also control the voltage across the vehicle battery pack through the motor voltage in the drive motor and the charging pile voltage, so that the voltage across the vehicle battery pack meets the charging voltage requirement of the vehicle battery pack.

[0026] The above-mentioned vehicle battery pack refers to a battery pack in a vehicle used to supply power to the vehicle, especially a battery pack in a new energy vehicle, wherein the vehicle battery pack is used to provide power to the vehicle, and the vehicle battery pack is composed of multiple battery cells. In the present utility model, the vehicle battery pack refers to a battery pack used to provide power to the vehicle.

[0027] The above-mentioned charging interface refers to the interface that connects the vehicle to the charging gun in the charging pile, wherein the charging interface is usually set on the vehicle casing. In this application, the charging interface is connected to the drive motor and is used to transmit the voltage in the charging pile to the two ends of the battery pack via the drive motor.

[0028] The above-mentioned controller is used to control the duty cycle of the field-effect transistor inside the drive motor, so that the inductor voltage in the motor inside the drive motor changes, and the voltage across the vehicle battery pack is controlled by changing the inductor voltage. The above-mentioned controller is also used to control the opening and closing of the switch in the vehicle charging system.

[0029] In an optional embodiment, the vehicle's charging system includes a drive motor, a charging interface, and a controller, wherein the first end of the drive motor is connected to the positive electrode of the battery pack in the vehicle, and the second end of the drive motor is connected to the negative electrode of the battery pack in the vehicle, for charging the battery pack in the vehicle, the first end of the charging interface is connected to the first end of the drive motor and is connected to the positive electrode of the vehicle's battery pack, and the controller is connected to the drive motor for controlling the voltage of the drive motor. In response to the charging interface being connected to the charging pile, the boost voltage of the drive motor is determined based on the first voltage of the battery pack and the second voltage of the charging pile, and the boost voltage and the second voltage are summed to charge the battery pack. In the present utility model, the drive motor is controlled by the controller to control the total voltage on the drive motor to be the boost voltage, and the vehicle battery pack is charged by the sum of the boost voltage and the second voltage of the charging pile.

[0030] In the present utility model, the driving motor is controlled by a controller so that the sum of the boost voltage and the second voltage of the driving motor meets the charging voltage requirements at both ends of the battery pack. The battery pack is charged based on the boost voltage and the second voltage, which effectively improves the applicability of the vehicle charging system.

[0031] Through the above system, the charging system provided by the utility model includes: a drive motor, the first end of the drive motor is connected to the positive pole of the battery pack in the vehicle, and the second end of the drive motor is connected to the negative pole of the battery pack; a charging interface, the first end of the charging interface is connected to the first end of the drive motor, and the second end of the charging interface is connected to the third end of the drive motor; a controller, connected to the drive motor. The utility model controls the voltage on the vehicle battery pack by changing the voltage on the inductor inside the motor, so that the sum of the boost voltage on the drive motor and the second voltage of the charging pile meets the voltage requirement of the vehicle battery pack, and thus there is no need to additionally set up a boost and buck module to adjust the voltage of the charging pile, which effectively reduces the cost of the vehicle charging system and reduces the volume of the vehicle charging system; the utility model also sets a drive motor and a controller between the vehicle battery pack and the charging interface, so that the battery pack can be charged based on the boost voltage and the second voltage of the charging pile, that is, the drive motor can be controlled by the controller to boost the voltage of the charging pile to the voltage required by the vehicle battery pack, thereby achieving the purpose of matching the output voltage with the voltage required by the vehicle battery pack, thereby realizing the technical effect of improving the compatibility of the charging pile and the vehicle, and thus solving the technical problem of low compatibility between the charging pile and the vehicle caused by the mismatch between the output voltage of the charging pile and the voltage required by the vehicle battery pack.

[0032] Optionally, the vehicle's charging system also includes: a first inductor, the first end of the first inductor is connected to the third end of the drive motor, and the second end of the first inductor is connected to the second end of the charging interface; a controller, connected to the drive motor, for determining the boost voltage of the drive motor based on the first voltage of the battery pack and the second voltage of the charging pile when the charging interface is connected to the charging pile, boosting the first inductor based on the boost voltage to obtain the third voltage of the first inductor, and charging the battery pack based on the boost voltage, the third voltage and the second voltage.

[0033] By setting a first inductor between the third end of the drive motor and the second end of the charging interface, the value range of the boost voltage can be increased. First, the first inductor is boosted based on the boost voltage. After obtaining the third voltage of the first inductor, the battery pack can be charged based on the sum of the boost voltage, the third voltage and the second voltage, so that the charging voltage can be consistent with the voltage of the battery pack. The battery pack can be charged under the condition of voltage adaptation, thereby achieving the purpose of charging the battery pack.

[0034] Optionally, the above-mentioned drive motor includes: a driver, a first end of the driver is connected to the first end of the drive motor, and a second end of the driver is connected to the second end of the drive motor; a motor, a first end of the motor is connected to the third end of the driver, and a second end of the motor is connected to the third end of the drive motor; a controller, connected to the driver, for determining the control parameters of the driver according to the boost voltage, and controlling the driver to boost to the boost voltage based on the control parameters.

[0035] The above-mentioned motor refers to a device for providing power to the vehicle. In the present utility model, in addition to providing power to the vehicle, the above-mentioned motor also boosts the voltage according to the charging pile voltage. The motor is provided with an inductor, and the sum of the inductor voltage and the charging pile voltage is the voltage value at both ends of the vehicle battery pack.

[0036] The above-mentioned driver refers to a device for controlling the above-mentioned inductor voltage. The driver includes a field-effect transistor. In the present utility model, the inductor voltage in the motor is controlled by controlling the duty cycle of the field-effect transistor, thereby controlling the voltage value at both ends of the vehicle battery pack.

[0037] The aforementioned control parameters may be parameters for controlling the field effect transistor group inside the driver.

[0038] In an optional embodiment, Figure 2 This is a schematic structural diagram of a preferred vehicle charging system according to an embodiment of the present utility model. Figure 2 As shown, the drive motor 2 includes: a driver and a motor 28, wherein the first end of the driver is connected to the first end of the drive motor 2, that is, the first end of the driver is connected to the positive pole of the battery pack 1, the second end of the driver is connected to the second end of the drive motor 2, that is, the second end of the driver is connected to the negative pole of the battery pack 1, the first end of the motor 28 is connected to the third end of the driver, and the second end of the motor 28 is connected to the third end of the drive motor, that is, the second end of the motor 28 is connected to the first end of the charging interface, wherein the driver is used to control the voltage of the motor 28, that is, the driver is controlled by the controller, and then the boost voltage of the motor 28 is adjusted.

[0039] In the present invention, the voltage in the charging pile is boosted by the driver and the motor to adjust the voltage at both ends of the vehicle battery pack so that the voltage at both ends of the vehicle battery pack meets the charging requirements of the vehicle battery pack, effectively improving the compatibility of the vehicle and enhancing the user experience.

[0040] Optionally, the above-mentioned driver includes: at least one field effect transistor group, the field effect transistor group includes a first field effect transistor and a second field effect transistor, the first end of the first field effect transistor is connected to the first end of the driver, the second end of the second field effect transistor is connected to the second end of the driver, and the second end of the first field effect transistor and the first end of the second field effect transistor are connected to the third end of the driver.

[0041] The above-mentioned field effect transistor is a semiconductor device that works on the principle of electric field effect. The current flow between the source and the drain is controlled by changing the voltage on the gate. In the present utility model, the on and off of the field effect transistor in the driver is controlled by a controller.

[0042] In an optional embodiment, the driver includes a field effect transistor group, which includes a first field effect transistor and a second field effect transistor. The first end of the first field effect transistor is connected to the first end of the driver, the second end of the second field effect transistor is connected to the second end of the driver, and the second end of the first field effect transistor and the first end of the second field effect transistor are connected to the third end of the driver. The controller controls the switch of the field effect transistor group to control the voltage in the motor, so that the voltage in the motor reaches the boost voltage.

[0043] In another optional embodiment, the driver includes multiple field effect transistor groups, each field effect transistor group includes a first field effect transistor and a second field effect transistor, the first end of the first field effect transistor is connected to the first end of the driver, the second end of the second field effect transistor is connected to the second end of the driver, the second end of the first field effect transistor and the first end of the second field effect transistor are connected to the third end of the driver, and the controller controls the switches of the field effect transistor group to control the voltage in the motor, so that the voltage in the motor reaches the boost voltage.

[0044] In the present invention, the first field effect transistor is turned on and the second field effect transistor is turned off to charge the inductor, thereby increasing the charging rate of the inductor voltage and improving the user experience.

[0045] Optionally, the above-mentioned motor includes: at least one second inductor, the first end of the second inductor is connected to the first interface in the third end of the driver, the first interface is the interface in the third end of the driver to which the field effect transistor group corresponding to the second inductor is connected, and the second end of the second inductor is connected to the third end of the drive motor; the controller is connected to the at least one field effect transistor group, and is used to control the switching state of the at least one field effect transistor group according to the control parameters, so that the driver boosts the inductor voltage of the at least one second inductor to the boost voltage, so as to charge the battery pack through the first inductor based on the boost voltage and the second voltage.

[0046] The boost voltage mentioned above refers to the difference between the voltage required for charging the vehicle battery pack and the second voltage. After the inductor voltage reaches the boost voltage, the sum of the inductor voltage and the second voltage is the voltage required for charging the vehicle battery pack.

[0047] In an optional embodiment, the motor includes an inductor, a first end of the inductor is connected to a first interface in the third end of the driver, the first interface is the interface at the connection between the first field effect transistor and the second field effect transistor in the driver, the second end of the inductor is connected to the third end of the drive motor, and the controller is connected to the field effect transistor group, and is used to control the switching state of the field effect transistor group according to the control parameters, so that the driver boosts the inductor voltage of at least one second inductor to the boost voltage, so as to charge the battery pack based on the boost voltage and the second voltage, wherein the controller controls the field effect transistor, thereby controlling the third voltage on the inductor in the motor, and the sum of the boost voltage, the third voltage and the second voltage is the voltage required to charge the vehicle battery pack.

[0048] In another optional embodiment, the motor includes multiple inductors, the first ends of the multiple inductors are connected to the first interface in the third end of the driver, the first interface is the interface in the third end of the driver to which the field effect transistor group corresponding to the inductor is connected, and the second end of the inductor is connected to the third end of the drive motor; the controller is connected to the multiple field effect transistor groups, and is used to control the multiple field effect transistor groups according to control parameters, so that the inductor voltage of the multiple inductors is a boost voltage, so as to charge the battery pack based on the boost voltage and the second voltage, wherein the controller controls the field effect transistor, thereby controlling the inductor voltage on the inductor in the motor to obtain the third voltage of the inductor, and the sum of the boost voltage, the third voltage and the second voltage is the voltage required to charge the vehicle battery pack.

[0049] In the present utility model, the field effect transistor is controlled by controlling parameters so that the inductor voltage is a boost voltage, and then the battery pack is charged based on the boost voltage and the second voltage, so that the voltage across the battery pack meets the battery pack charging voltage requirement, effectively improving the compatibility of the vehicle and enhancing the user experience.

[0050] Optionally, the vehicle's charging system also includes: a first switch, arranged between the drive motor and the battery pack; a second switch, arranged between the drive motor and the charging interface; a third switch, arranged between the third end of the drive motor and the second switch; a fourth switch, arranged between the second end of the drive motor and the second switch; a controller, connected to the first switch, the second switch, the third switch and the fourth switch, in response to the boost voltage being a preset value, closing the first switch, the second switch and the fourth switch, opening the third switch, and charging the battery pack based on the second voltage.

[0051] In an optional embodiment, as Figure 2As shown, the first switch includes a positive switch 11 and a negative switch 12. The positive switch 11 is connected between the positive terminal of the vehicle battery pack 1 and the first terminal of the drive motor 2, and the negative switch 12 is connected between the negative terminal of the battery pack 1 and the second terminal of the drive motor 2. The second switch includes a third sub-switch 33 and a second sub-switch 32, respectively provided at both ends of the charging port 3. These switches are used to control the charging pile to directly charge the vehicle battery pack 1, or to control the boost voltage on the drive motor 2 and the charging pile voltage to charge the vehicle battery pack 1. A controller is connected to the first and second switches, respectively. In response to the connection between the charging port 3 and the charging pile, the controller controls the first and second switches to close, thereby charging the vehicle battery pack 1 based on the boost voltage and the second voltage. By configuring the first and second switches, the controller closes the first and second switches after the charging port is connected to the charging pile, and then charges the battery pack, effectively improving the safety of the vehicle's charging system.

[0052] The third switch includes a fourth sub-switch 34 and a fifth sub-switch 35, which are disposed between the third terminal of the drive motor and the second switch. The fourth switch includes a first sub-switch 31, which is disposed between the second terminal of the drive motor and the second switch. The third and fourth switches protect the vehicle's charging system. When the vehicle's charging system meets requirements, the vehicle's battery pack is charged, thereby improving the safety of the vehicle's charging system.

[0053] The above preset value can be 0 and can be adjusted according to actual conditions.

[0054] When boosting is not required, that is, when the boost voltage is 0, the first, second, and fourth switches can be closed, the third switch can be opened, and the battery pack can be charged based on the second voltage. If the boost voltage is not at a preset value, the first, second, and third switches can be closed, the fourth switch can be opened, and the battery pack can be charged based on the third and second voltages of the inductor.

[0055] In the present utility model, by setting a third switch, the connection between the first inductor and the drive motor can be controlled. In response to when the voltage of the charging pile meets the first voltage requirement of the vehicle battery pack, the vehicle battery pack can be charged directly through the charging pile by disconnecting the third switch, thereby effectively improving the charging efficiency of the vehicle charging system and enhancing the user experience.

[0056] Optionally, the first field effect transistor includes a first sub-field effect transistor, a second sub-field effect transistor, and a third sub-field effect transistor, the second field effect transistor includes a fourth sub-field effect transistor, a fifth sub-field effect transistor, and a sixth sub-field effect transistor, and at least one field effect transistor group includes: a first field effect transistor group including a first sub-field effect transistor and a fourth sub-field effect transistor, the first end of the first sub-field effect transistor being connected to the first end of the driver, the second end of the fourth sub-field effect transistor being connected to the second end of the driver, and the second end of the first sub-field effect transistor and the first end of the fourth sub-field effect transistor being connected to the third end of the driver; and a second field effect transistor group, It includes a second sub-field effect transistor and a fifth sub-field effect transistor, the first end of the second sub-field effect transistor is connected to the first end of the driver, the second end of the fifth sub-field effect transistor is connected to the second end of the driver, and the second end of the second sub-field effect transistor and the first end of the fifth sub-field effect transistor are connected to the third end of the driver; the third field effect transistor group includes a third sub-field effect transistor and a sixth sub-field effect transistor, the first end of the third sub-field effect transistor is connected to the first end of the driver, the second end of the sixth sub-field effect transistor is connected to the second end of the driver, and the second end of the third sub-field effect transistor and the first end of the sixth sub-field effect transistor are connected to the third end of the driver.

[0057] In an optional embodiment, as Figure 2As shown, the first field effect transistor includes a first sub-field effect transistor 21, a second sub-field effect transistor 22 and a third sub-field effect transistor 23, the second field effect transistor includes a fourth sub-field effect transistor 24, a fifth sub-field effect transistor 25 and a sixth sub-field effect transistor 26, and at least one field effect transistor group includes: a first field effect transistor group, including the first sub-field effect transistor 21 and the fourth sub-field effect transistor 24, the first end of the first sub-field effect transistor 21 is connected to the first end of the driver, the second end of the fourth sub-field effect transistor 24 is connected to the second end of the driver, and the second end of the first sub-field effect transistor 21 and the first end of the fourth sub-field effect transistor 24 are connected to the third end of the driver; a second field effect transistor group, including the second sub-field effect transistor 22 and the fifth sub-field effect transistor 25, the first end of the second sub-field effect transistor 22 is connected to the first end of the driver, and the second end of the fifth sub-field effect transistor 25 is connected The first sub-inductor 281 is connected to the second end of the driver, the second end of the second sub-field effect transistor 22 and the first end of the fifth sub-field effect transistor 25 are connected to the third end of the driver; the third field effect transistor group includes a third sub-field effect transistor 23 and a sixth sub-field effect transistor 26, the first end of the third sub-field effect transistor 23 is connected to the first end of the driver, the second end of the sixth sub-field effect transistor 26 is connected to the second end of the driver, the second end of the third sub-field effect transistor 23 and the first end of the sixth sub-field effect transistor 26 are connected to the third end of the driver. In the present utility model, the inductor voltage on the first sub-inductor 281 is controlled by the first sub-field effect transistor 21 and the fourth sub-field effect transistor 24, the inductor voltage on the second sub-inductor 282 is controlled by the second sub-field effect transistor 22 and the fifth sub-field effect transistor 25, and the inductor voltage on the third sub-inductor 283 is controlled by the third sub-field effect transistor 23 and the sixth sub-field effect transistor 26.

[0058] In the present invention, different inductors are controlled respectively by different field effect transistor groups to control the inductor voltage to a boost voltage, thereby improving the stability of the vehicle charging system and enhancing the user experience.

[0059] Optionally, at least one second inductor includes: a first sub-inductor, wherein the first end of the first sub-inductor is connected to the second end of the first sub-field effect transistor, or the first end of the first sub-inductor is connected to the first end of the fourth sub-field effect transistor, and the second end of the first sub-inductor is connected to the third end of the drive motor; a second sub-inductor, wherein the first end of the second sub-inductor is connected to the second end of the second sub-field effect transistor, or the first end of the second sub-inductor is connected to the first end of the fifth sub-field effect transistor, and the second end of the second sub-inductor is connected to the third end of the drive motor; and a third sub-inductor, wherein the first end of the third sub-inductor is connected to the second end of the third sub-field effect transistor, or the first end of the third sub-inductor is connected to the first end of the sixth sub-field effect transistor, and the second end of the second sub-inductor is connected to the third end of the drive motor.

[0060] In an optional embodiment, as Figure 2 As shown, at least one second inductor includes a first sub-inductor 281, a second sub-inductor 282 and a third sub-inductor 283. The first end of the first sub-inductor 281 is connected to the second end of the first sub-field effect transistor 21, that is, the first end of the first sub-inductor 281 is connected to the first end of the fourth sub-field effect transistor 24, and the second end of the first sub-inductor 281 is connected to the third end of the drive motor 2; the first end of the second sub-inductor 282 is connected to the second end of the second sub-field effect transistor 22, that is, the first end of the second sub-inductor 282 is connected to the first end of the fifth sub-field effect transistor 25, and the second end of the second sub-inductor 282 is connected to the third end of the drive motor 2; The first end of the sub-inductor 283 is connected to the second end of the third sub-field effect transistor 23, that is, the first end of the third sub-inductor 283 is connected to the first end of the sixth sub-field effect transistor 26, and the second end of the third sub-inductor 283 is connected to the third end of the drive motor 2. In the present utility model, the inductor voltage on the first sub-inductor 281 is controlled by the first sub-field effect transistor 21 and the fourth sub-field effect transistor 24, the inductor voltage on the second sub-inductor 282 is controlled by the second sub-field effect transistor 22 and the fifth sub-field effect transistor 25, and the inductor voltage on the third sub-inductor 283 is controlled by the third sub-field effect transistor 23 and the sixth sub-field effect transistor 26.

[0061] The following combination Figure 2 A preferred embodiment of the present invention is described in detail, wherein: Figure 2 This is a schematic structural diagram of a preferred vehicle charging system according to an embodiment of the present utility model. Figure 2As shown, the system includes: a vehicle battery pack 1, a drive motor 2, a charging interface 3, and a first inductor 5; the drive motor 2 includes: a driver and a motor 28, the driver includes a first sub-field effect transistor 21, a second sub-field effect transistor 22, a third sub-field effect transistor 23, a fourth sub-field effect transistor 24, a fifth sub-field effect transistor 25, and a sixth sub-field effect transistor 26, wherein the first ends of the first sub-field effect transistor 21, the second sub-field effect transistor 22, and the third sub-field effect transistor 23 are all connected to the positive electrode of the vehicle battery pack 1 through the positive switch 11, and the second ends of the fourth sub-field effect transistor 24, the fifth sub-field effect transistor 25, and the sixth sub-field effect transistor 26 are all connected to the negative electrode of the vehicle battery pack 1 through the negative switch 12; the motor 28 includes: a first sub-inductor 281, the second sub-inductor 282, and the third sub-inductor 283. The second ends of the first sub-inductor 281, the second sub-inductor 282, and the third sub-inductor 283 are all connected to the first inductor 5 through the fourth sub-switch 34. The first end of the first sub-inductor 281 is connected to the second end of the first sub-field effect transistor 21 and the first end of the fourth sub-field effect transistor 24. The first end of the second sub-inductor 282 is connected to the second end of the second sub-field effect transistor 22 and the first end of the fifth sub-field effect transistor 25. The first end of the third sub-inductor 283 is connected to the second end of the third sub-field effect transistor 23 and the first end of the sixth sub-field effect transistor 26. In the present invention, the controller responds to the connection between the charging interface 3 and the charging pile, and closes the positive switch 11 and the negative switch 12 to charge the vehicle battery pack 1.

[0062] like Figure 2 As shown, a first capacitor 27 is provided between the positive switch 11 and the negative switch 12, a fifth sub-switch 35 is provided between the second sub-switch 32 and the third sub-switch 33, and a second capacitor 36 is provided. A second sub-switch 32 and a fourth sub-switch 34 are provided at both ends of the first inductor 5, respectively. A first sub-switch 31 is also provided between the second end of the first inductor 5 and the negative electrode of the vehicle battery pack 1. In the present utility model, in response to the vehicle charging port 3 being connected to the charging pile and the charging pile voltage meeting the vehicle battery pack voltage 1 requirement, the controller closes the positive switch 11, the negative switch 12, the first sub-switch 31, the second sub-switch 32, and the third sub-switch 33, and opens the fourth sub-switches 34 and the fifth sub-switches 35, so that the charging pile directly charges the vehicle battery pack.

[0063] For example, charging the battery pack based on the boost voltage and the second voltage is divided into a storage phase and a discharge phase, wherein the storage phase is used to charge the inductor in the motor, and the discharge phase is used to charge the battery pack based on the boost voltage and the second voltage. Figure 2As shown, in response to the vehicle charging interface 3 being connected to the charging pile and the charging pile voltage not meeting the voltage requirement of the vehicle battery pack 1, that is, when the charging pile voltage is lower than the vehicle battery pack voltage, the charging system of the vehicle described in this embodiment first enters the energy storage stage, and the positive switch 11, the negative switch 12, the second sub-switch 32, the third sub-switch 33, the fourth sub-switch 34 and the fifth sub-switch 35 are closed by the controller, and the first sub-switch 31 is disconnected; and the first sub-field effect transistor 21, the second sub-field effect transistor 22 and the third sub-field effect transistor 23 are controlled to be closed by the controller, and the fourth sub-field effect transistor 24, the fifth sub-field effect transistor 25 and the sixth sub-field effect transistor 26 are controlled to be disconnected, and the inductance values ​​of the first inductor 5, the first sub-inductor 281, the second sub-inductor 282 and the third sub-inductor 283 are increased by the charging pile. In response to the total voltage on the first inductor 5, the first sub-inductor 281, the second sub-inductor 282, and the third sub-inductor 283 meeting the boost voltage, the vehicle's charging system is in the discharge stage at this time, and the controller controls the fourth sub-field effect transistor 24, the fifth sub-field effect transistor 25, and the sixth sub-field effect transistor 26 to be closed, and controls the first sub-field effect transistor 21, the second sub-field effect transistor 22, and the third sub-field effect transistor 23 to be disconnected, so that the first inductor 5, the first sub-inductor 281, the second sub-inductor 282, the third sub-inductor 283, and the charging pile charge the vehicle battery pack 1 at the same time.

[0064] In the present invention, a first capacitor is connected between the first and second ends of the driver to protect the driver, thereby improving the safety of the vehicle's charging system; and a second capacitor is provided to protect the drive motor, thereby effectively improving the safety of the vehicle's charging system and enhancing the user experience.

[0065] In the present invention, different inductors are controlled respectively by different field effect transistor groups to control the inductor voltage to a boost voltage, thereby improving the stability of the vehicle charging system and enhancing the user experience.

[0066] In the above embodiments of the present invention, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0067] In the several embodiments provided by the present invention, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only exemplary. For example, the division of the units can be a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0068] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0069] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0070] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program code.

[0071] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A vehicle charging system, characterized in that: include: a drive motor, wherein a first end of the drive motor is connected to the positive electrode of a battery pack in the vehicle, and a second end of the drive motor is connected to the negative electrode of the battery pack; a charging interface, wherein a first end of the charging interface is connected to a first end of the drive motor, and a second end of the charging interface is connected to a third end of the drive motor; A controller is connected to the drive motor and is used to determine the boost voltage of the drive motor according to the first voltage of the battery pack and the second voltage of the charging pile when the charging interface is connected to the charging pile, and to charge the battery pack based on the boost voltage and the second voltage.

2. The vehicle charging system according to claim 1, wherein: The vehicle charging system further includes: a first inductor, wherein a first end of the first inductor is connected to the third end of the drive motor, and a second end of the first inductor is connected to the second end of the charging interface; A controller is connected to the drive motor and is used to determine the boost voltage of the drive motor according to the first voltage of the battery pack and the second voltage of the charging pile when the charging interface is connected to the charging pile, boost the first inductor based on the boost voltage to obtain a third voltage of the first inductor, and charge the battery pack based on the boost voltage, the third voltage and the second voltage.

3. The vehicle charging system according to claim 2, characterized in that: The driving motor comprises: a driver, wherein a first end of the driver is connected to a first end of the drive motor, and a second end of the driver is connected to a second end of the drive motor; a motor, wherein a first end of the motor is connected to a third end of the driver, and a second end of the motor is connected to a third end of the drive motor; The controller is connected to the driver, and is configured to determine a control parameter of the driver according to the boost voltage, and control the driver to boost the voltage to the boost voltage based on the control parameter.

4. The vehicle charging system according to claim 3, characterized in that: The driver includes: At least one field effect transistor group, the field effect transistor group including a first field effect transistor and a second field effect transistor, the first end of the first field effect transistor is connected to the first end of the driver, the second end of the second field effect transistor is connected to the second end of the driver, and the second end of the first field effect transistor and the first end of the second field effect transistor are connected to the third end of the driver.

5. The vehicle charging system according to claim 4, characterized in that: The motor comprises: at least one second inductor, wherein a first end of the second inductor is connected to a first interface in the third end of the driver, the first interface being an interface in the third end of the driver to which a field effect transistor group corresponding to the second inductor is connected, and a second end of the second inductor is connected to the third end of the drive motor; The controller is connected to the at least one field effect transistor group and is used to control the switching state of the at least one field effect transistor group according to the control parameters, so that the driver boosts the inductor voltage of the at least one second inductor to the boost voltage, so as to charge the battery pack through the first inductor based on the boost voltage and the second voltage.

6. The vehicle charging system according to claim 3, characterized in that: The vehicle charging system further includes: a first switch, disposed between the drive motor and the battery pack; a second switch, disposed between the drive motor and the charging port; a third switch, disposed between the third end of the drive motor and the second switch; a fourth switch, disposed between the second end of the drive motor and the second switch; A controller is connected to the first switch, the second switch, the third switch, and the fourth switch. In response to the boost voltage being a preset value, the controller closes the first switch, the second switch, and the fourth switch, opens the third switch, and charges the battery pack based on the second voltage.

7. The vehicle charging system according to claim 6, characterized in that: The controller is further configured to, in response to the boost voltage being different from the preset value, close the first switch, the second switch, and the third switch, open the fourth switch, boost the first inductor based on the boost voltage to obtain the third voltage, and charge the battery pack based on the third voltage and the second voltage.

8. The vehicle charging system according to claim 4, characterized in that: The first field effect transistor includes a first sub-field effect transistor, a second sub-field effect transistor, and a third sub-field effect transistor; the second field effect transistor includes a fourth sub-field effect transistor, a fifth sub-field effect transistor, and a sixth sub-field effect transistor; and the at least one field effect transistor group includes: a first field effect transistor group, comprising a first sub-field effect transistor and a fourth sub-field effect transistor, wherein a first end of the first sub-field effect transistor is connected to the first end of the driver, a second end of the fourth sub-field effect transistor is connected to the first end of the driver, and the second end of the first sub-field effect transistor and the first end of the fourth sub-field effect transistor are connected to the third end of the driver; a second field effect transistor group, comprising a second sub-field effect transistor and a fifth sub-field effect transistor, wherein a first terminal of the second sub-field effect transistor is connected to the first terminal of the driver, a second terminal of the fifth sub-field effect transistor is connected to the first terminal of the driver, and a second terminal of the second sub-field effect transistor and a first terminal of the fifth sub-field effect transistor are connected to the third terminal of the driver; The third field effect transistor group includes a third sub-field effect transistor and a sixth sub-field effect transistor, the first end of the third sub-field effect transistor is connected to the first end of the driver, the second end of the sixth sub-field effect transistor is connected to the first end of the driver, and the second end of the third sub-field effect transistor and the first end of the sixth sub-field effect transistor are connected to the third end of the driver.

9. The vehicle charging system according to claim 8, characterized in that: The at least one second inductor comprises: a first sub-inductor, wherein a first end of the first sub-inductor is connected to the second end of the first sub-field effect transistor, or a first end of the first sub-inductor is connected to the first end of the fourth sub-field effect transistor, and a second end of the first sub-inductor is connected to the third end of the drive motor; a second sub-inductor, wherein a first end of the second sub-inductor is connected to a second end of the second sub-field effect transistor, or a first end of the second sub-inductor is connected to a first end of the fifth sub-field effect transistor, and a second end of the second sub-inductor is connected to a third end of the drive motor; A third sub-inductor, wherein the first end of the third sub-inductor is connected to the second end of the third sub-field effect transistor, or the first end of the third sub-inductor is connected to the first end of the sixth sub-field effect transistor, and the second end of the second sub-inductor is connected to the third end of the drive motor.

10. A vehicle, characterized in that: include: A vehicle charging system according to any one of claims 1 to 9.

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