Vehicle charging device and vehicle

Abstract

The utility model provides a vehicle charging device and a vehicle, and relates to the field of vehicle charging, the vehicle charging device multiplexes a rectification circuit and an isolation type converter in a vehicle wired charging device, the output end of the rectification circuit is connected with the input end of the isolation type converter, and the output end of the isolation type converter is connected with a vehicle battery. On the basis, a wireless charging receiver and a switching device are additionally arranged at the front end of the rectifying circuit, and specifically, the wireless charging receiver is connected with the input end of the rectifying circuit through the switching device. The vehicle can be wirelessly charged by controlling the switching device to be switched on. Due to the fact that the isolated converter in the wired charging device of the vehicle is reused, the voltage regulating function can be achieved, the voltage requirements of different vehicle batteries are met, and support is provided for wireless charging of the different vehicle batteries.

Description

Technical Field

[0001] The present application relates to the field of vehicle charging, and in particular to a vehicle charging device and a vehicle. Background Art

[0002] Wireless charging technology has been widely used in charging mobile phones, computers and other terminal devices. With the increase in the number of new energy vehicles, the wireless charging technology of new energy vehicles will also develop rapidly. The vehicle can wirelessly charge the vehicle's power battery through the wireless charging device installed on it, providing users with convenient vehicle charging.

[0003] Due to differences in manufacturers, models or power types, the rated voltage of batteries in new energy vehicles varies, for example, the rated voltage of battery packs is 400V or 800V, etc. Currently, existing wireless charging devices cannot adapt to batteries of different vehicles. Utility Model Content

[0004] The embodiments of the present application provide a vehicle charging device and a vehicle, which provide support for wireless charging of batteries adapted to different vehicles.

[0005] In a first aspect, an embodiment of the present application provides a vehicle charging device, comprising: a wired charging device and a first wireless charging device; the wired charging device comprises a first rectifier circuit and an isolation converter, and the first wireless charging device comprises a first rectifier circuit, an isolation converter, a wireless charging receiver and a switching device; the wireless charging receiver is connected to the input end of the first rectifier circuit through the switching device, the input end of the isolation converter is connected to the output end of the first rectifier circuit, and the output end of the isolation converter is connected to the vehicle battery.

[0006] The wireless charging receiver is used to generate a first alternating current in response to changes in the magnetic field; the first rectifier circuit is used to convert the first alternating current into a first direct current; the isolated converter is used to convert the first direct current into a second direct current, and the voltage value of the second direct current meets the voltage requirement of the battery.

[0007] The wired charging device may also be referred to as a vehicle-mounted charger. The wireless charging receiver includes a receiving coil, which senses a change in a magnetic field to generate a first alternating current.

[0008] The above-mentioned vehicle charging device can be applied to the vehicle side. The first wireless charging device in the vehicle charging device reuses the components in the wired charging device, such as the first rectifier circuit and the isolated converter, and adds a switch device and a wireless charging receiver at the front end of the first rectifier. By controlling the conduction of the switch device, the vehicle wireless charging function is realized. Since the existing components in the vehicle are reused, on the one hand, the cost of designing the vehicle wireless charging device can be reduced, and on the other hand, the space occupied by the wireless charging device in the vehicle can be reduced. In the wireless charging process, the rectification function is realized by reusing the rectification circuit in the wired charging device, and the voltage regulation function is realized by reusing the isolated converter in the wired charging device, so as to meet the voltage requirements of different batteries and provide support for wireless charging of batteries adapted to different vehicles.

[0009] In an optional embodiment of the first aspect, the isolated converter includes any one of the following: an LLC resonant converter, or a CLLC resonant converter, or a phase-shifted full-bridge converter. The isolated converter serves to isolate input and output circuits to achieve electrical isolation and power transmission.

[0010] In an optional embodiment of the first aspect, the isolated converter includes: a first inverter circuit, a transformer, and a second rectifier circuit; the input end of the first inverter circuit is connected to the output end of the first rectifier circuit, the output end of the first inverter circuit is connected to the input end of the transformer, and the output end of the transformer is connected to the input end of the second rectifier circuit.

[0011] In actual applications, the first controller of the vehicle controls the switching frequency of the first inverter circuit in the isolated converter so that the isolated converter converts the first direct current into the second direct current; the switching frequency is determined according to the voltage value of the battery. Exemplarily, the first controller adjusts the switching frequency of the thyristor device of the first inverter in the isolated converter according to the voltage value of the battery. When the voltage value of the battery is too high (such as the voltage value exceeds threshold 1), the first controller increases the switching frequency to reduce the voltage value of the battery; when the voltage value of the battery is too low (such as the voltage value is lower than threshold 2), the first controller reduces the switching frequency to increase the voltage value of the battery, thereby realizing the regulation of the battery charging voltage.

[0012] The first controller can adjust the battery voltage value by controlling the switching frequency of the thyristor device in the isolation converter to prevent the battery voltage value from being too low or too high.

[0013] In an optional embodiment of the first aspect, the vehicle charging device further includes: a first current detection device, which is arranged between the switch device and the first rectifier circuit, and is used to detect the current value of the first alternating current.

[0014] In actual applications, the first controller of the vehicle obtains the current value of the first alternating current from the first current detection device. When the current value of the first alternating current is greater than the first threshold value, the first controller can control the conduction or shutdown of the thyristor device in the first rectifier circuit to avoid the current value of the first alternating current flowing into the first rectifier circuit being too large and damaging the device, thereby realizing the overcurrent protection function.

[0015] Exemplarily, the first rectifier circuit is a two-phase bridge rectifier circuit, see the attached Figure 6 The first current detection device 23 detects the current value of the first alternating current flowing into the midpoint of the first bridge arm of the first rectifier 11, wherein the first bridge arm is connected in series with thyristor devices Q1 and Q3. When the current value of the first alternating current point is greater than the first threshold value, the first controller (not shown in the figure) controls the thyristor devices Q1 and Q4 in the first rectifier circuit 11 to turn on, and controls the thyristor devices Q2 and Q3 in the first rectifier circuit 11 to turn off, thereby realizing overcurrent protection.

[0016] In an optional embodiment of the first aspect, the vehicle charging device further includes: a second current detection device, which is arranged between the isolation converter and the battery, and is used to detect the current value of the battery.

[0017] In practical applications, the first controller of the vehicle obtains the current value of the battery from the second current detection device. When the current value of the battery is greater than the second threshold, the first controller can control the first inverter in the battery front-end isolation converter to shut down, so as to avoid excessive battery charging current and damage to the battery, thereby realizing the overcurrent protection function for the battery. Controlling the first inverter to shut down may refer to controlling all thyristor devices in the first inverter to shut down.

[0018] In an optional embodiment of the first aspect, the first rectifier circuit includes: a three-phase bridge rectifier circuit, or a two-phase bridge rectifier circuit.

[0019] In an optional embodiment of the first aspect, the switch device includes: a connector, a first switch, and a second switch; one end of the connector is connected to the wireless charging receiver, and the other end of the connector is connected to the input end of the first rectifier circuit through the first switch and the second switch. During wireless charging, the first switch and the second switch are turned on; during wired charging, the first switch and the second switch are turned off.

[0020] In some embodiments, the switch device may also be a control switch in other forms, such as a double-pole double-throw switch, etc., as long as it has the function of turning on or off the circuit connection between the wireless charging receiver and the first rectifier circuit.

[0021] In practical applications, the first controller of the vehicle can realize wireless charging of the vehicle by controlling the first switch and the second switch in the switch device to be turned on at the same time. The first controller can realize wired charging of the vehicle by controlling the first switch and the second switch in the switch device to be turned off at the same time.

[0022] In a second aspect, an embodiment of the present application provides a vehicle charging device, comprising: a second wireless charging device; the second wireless charging device comprises a third rectifier circuit, a wireless charging receiver and a switching device; the third rectifier circuit is a rectifier circuit in an electric drive controller or an extended-range controller of the vehicle; the wireless charging receiver is connected to the third rectifier circuit through a switching device, and the output end of the third rectifier circuit is connected to a vehicle battery.

[0023] The wireless charging receiver is used to generate a first alternating current in response to a change in the magnetic field; the third rectifier circuit is used to convert the first alternating current into a second direct current, and the current value of the second direct current meets the current requirement of the vehicle battery.

[0024] The wireless charging receiver includes a receiving coil, which senses changes in the magnetic field to generate a first alternating current.

[0025] The above-mentioned vehicle charging device can be applied to the vehicle side. The second wireless charging device in the vehicle charging device reuses the rectifier circuit in the electric drive controller or the range extender controller, and adds a switch device and a wireless charging receiver at the front end of the rectifier circuit. By controlling the conduction of the switch device, the vehicle wireless charging function is realized. Reusing existing components in the vehicle can reduce the cost of designing the vehicle wireless charging device on the one hand, and on the other hand, it can also reduce the space occupied by the wireless charging device in the vehicle. The rectifier circuit in the electric drive controller or the range extender controller is reused to realize the rectification function. The second wireless charging device is suitable for high-power wireless charging scenarios and can achieve a wireless charging power of 60kW to 120kW.

[0026] In an optional embodiment of the second aspect, the third rectifier circuit is a three-phase bridge rectifier circuit; the wireless charging receiver is connected to the midpoint of any two bridge arms of the third rectifier circuit through a switching device.

[0027] For example, see the attached Fig.10 The wireless charging receiver 21 is connected to the midpoint of the first bridge arm and the second bridge arm in the third rectifier circuit 41 through the switch device 22. Q1 and Q2 are connected in series on the first bridge arm, and Q3 and Q4 are connected in series on the second bridge arm.

[0028] The three-phase bridge rectifier circuit is superior to the two-phase bridge rectifier circuit in electrical performance, especially in rectification effect. The three-phase bridge rectifier circuit has higher rectification efficiency and more stable output.

[0029] In an optional embodiment of the second aspect, the vehicle charging device further includes: a third current detection device, which is arranged between the switching device and the third rectifier circuit, and is used to detect the current value of the first alternating current.

[0030] In an optional embodiment of the second aspect, the two bridge arms connected to the switch device in the third rectifier circuit include a first bridge arm and a second bridge arm; the first bridge arm is connected in series with a first thyristor device and a second thyristor device, the second bridge arm is connected in series with a third thyristor device and a fourth thyristor device, the first thyristor device and the third thyristor device share a common anode, and the second thyristor device and the fourth thyristor device share a common cathode. The third current detection device is used to detect the current value of the first alternating current flowing into the midpoint of the first bridge arm.

[0031] In actual applications, the second controller of the vehicle obtains the current value of the first alternating current from the third current detection device. When the current value of the first alternating current is greater than the third threshold, the second controller controls the second thyristor device and the third thyristor device to be turned on, and controls the first thyristor device and the fourth thyristor device to be turned off; or, when the current value of the first alternating current is less than the fourth threshold, the second controller controls the first thyristor device and the fourth thyristor device to be turned on, and controls the second thyristor device and the fourth thyristor device to be turned off; wherein the third threshold is greater than the fourth threshold.

[0032] Exemplarily, the third threshold is i1, the fourth threshold is -i1, i1 is a positive number, see the attached Fig.10 The first bridge arm of the third rectifier circuit 41 includes a first thyristor device Q1 and a second thyristor device Q2 connected in series, and the second bridge arm of the third rectifier circuit 41 includes a third thyristor device Q3 and a fourth thyristor device Q4 connected in series. When the current value of the first alternating current flowing into the midpoint of the first bridge arm is greater than i1, the second controller (not shown in the figure) controls Q2 and Q3 to be turned on, and Q1 and Q4 to be turned off; when the current value of the first alternating current flowing into the midpoint of the first bridge arm is less than -i1, the second controller controls Q1 and Q4 to be turned on, and Q2 and Q4 to be turned off.

[0033] The vehicle's second controller monitors the current value of the first alternating current flowing into the third rectifier circuit, and can adjust the size of the second direct current output by the third rectifier circuit by controlling the conduction or shutdown of some thyristor devices in the third rectifier circuit, thereby realizing the current regulation function and protecting the battery.

[0034] In an optional embodiment of the second aspect, the switch device includes: a connector, a first switch, and a second switch; one end of the connector is connected to the wireless charging receiver, and the other end of the connector is connected to the input end of the third rectifier circuit through the first switch and the second switch. During wireless charging, the first switch and the second switch are turned on; during wired charging, the first switch and the second switch are turned off.

[0035] In some embodiments, the switch device may also be a control switch in other forms, such as a double-pole double-throw switch, etc., as long as it has the function of turning on or off the circuit connection between the wireless charging receiver and the third rectifier circuit.

[0036] In practical applications, the second controller of the vehicle can realize wireless charging of the vehicle by controlling the first switch and the second switch in the switch device to be turned on at the same time. The second controller can realize wired charging of the vehicle by controlling the first switch and the second switch in the switch device to be turned off at the same time.

[0037] In a third aspect, an embodiment of the present application provides a vehicle charging device, comprising: a fourth rectifier circuit, a second inverter circuit, N switches and N transmitting coils, where N is a positive integer greater than 1; the input end of the fourth rectifier circuit is connected to the power grid, the output end of the fourth rectifier circuit is connected to the input end of the second inverter circuit, the output end of the second inverter circuit is respectively connected to the N transmitting coils, and a switch is provided between each transmitting coil and the second inverter circuit. The fourth rectifier circuit is used to convert the second alternating current of the power grid into a third direct current; the second inverter circuit is used to convert the third direct current into a third alternating current; and the transmitting coil is used to generate a magnetic field change based on the third alternating current.

[0038] In actual application, the third controller at the pile end controls the switch corresponding to the target transmitting coil to be turned on according to the position of the target vehicle, wherein the target vehicle is a vehicle to be wirelessly charged, and the target transmitting coil is a transmitting coil corresponding to the position of the target vehicle.

[0039] The number of turns of the coils of the N transmitting collars may be the same.

[0040] In some embodiments, the fourth rectifier circuit is a two-phase bridge rectifier circuit, or a three-phase bridge rectifier circuit.

[0041] The above-mentioned vehicle charging device can be applied to the charging pile end, and multiple parking spaces reuse a set of rectifier circuits (i.e., the fourth rectifier circuit) and inverter circuits (i.e., the second inverter circuit), which can reduce the cost of the vehicle charging device at the charging pile end. When vehicles in multiple parking spaces all need wireless charging, the third controller at the charging pile end can control the corresponding multiple switches to turn on, so that the transmitting coils on the corresponding parking spaces generate magnetic field changes, thereby realizing wireless charging for multiple vehicles at the same time.

[0042] In a fourth aspect, an embodiment of the present application provides a vehicle, comprising: a vehicle charging device as described in any one of the first aspect or the second aspect.

[0043] The fourth aspect of the present application corresponds to the technical solution of the first aspect or the second aspect of the present application, and the beneficial effects achieved are similar, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A schematic diagram of the structure of a wired charging device provided in an embodiment of the present application;

[0045] Figure 2 for Figure 1 A specific structural schematic diagram of the wired charging device shown;

[0046] Figure 3 A schematic diagram of a vehicle wireless charging scenario provided in an embodiment of the present application;

[0047] Figure 4 A schematic diagram of the structure of a vehicle charging device applied to a vehicle end provided in an embodiment of the present application;

[0048] Figure 5 A schematic diagram of the structure of an isolated converter provided in an embodiment of the present application;

[0049] Figure 6 for Figure 4 A specific structural schematic diagram of the vehicle charging device shown;

[0050] Figure 7 A schematic diagram of the structure of a vehicle charging device applied to a vehicle end provided in an embodiment of the present application;

[0051] Figure 8 A flow chart of a charging control method provided in an embodiment of the present application;

[0052] Fig. 9 A schematic diagram of the structure of a vehicle charging device applied to a vehicle end provided in an embodiment of the present application;

[0053] Fig.10 for Fig. 9 A specific structural schematic diagram of the vehicle charging device shown;

[0054] Fig.11 A schematic diagram of the structure of a vehicle charging device applied to a vehicle end provided in an embodiment of the present application;

[0055] Fig.12 A flow chart of a charging control method provided in an embodiment of the present application;

[0056] Fig.13 A schematic diagram of the structure of a vehicle charging device applied to a charging pile end provided in an embodiment of the present application;

[0057] Fig.14 A schematic diagram of a vehicle wireless charging scenario provided in an embodiment of the present application;

[0058] Fig.15 An interactive schematic diagram of wireless charging of a vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0059] With the popularity of new energy vehicles, more and more users are buying electric vehicles or hybrid electric vehicles. At present, the common charging method for new energy vehicles is wired charging. Users can find a power interface at a dedicated charging pile or charging station, connect the car to the charging pile and charge it.

[0060] In the wired charging mode, the vehicle can charge the vehicle's power battery through a wired charging device installed thereon. In some embodiments, the wired charging device may also be referred to as an on-board charger (OBC, On-Board Charger).

[0061] Figure 1 This is a schematic diagram of the structure of a wired charging device provided in an embodiment of the present application. Figure 1 As shown, the wired charging device includes: a front-stage power factor correction (PFC) rectifier circuit and a rear-stage isolated converter. The PFC rectifier circuit is used to convert the AC power of the power grid into DC power. The isolated converter is used to convert the DC power output by the PFC rectifier circuit into the DC power required by the vehicle battery, while realizing the constant current / constant voltage charging function and ensuring the electrical insulation between the AC high-voltage side and the DC high-voltage side. Among them, the isolated converter can be an LLC resonant converter, a CLLC resonant converter or a phase-shifted full-bridge converter.

[0062] Figure 2 for Figure 1 A specific structural schematic diagram of a wired charging device is shown. Figure 2 The PFC rectifier circuit shown is a two-phase bridge rectifier circuit, which may include: a capacitor L1, a first bridge arm and a second bridge arm, wherein two thyristor devices (such as Figure 2 Q1 and Q2 in the figure), the second bridge arm has two thyristor devices connected in series (such as Figure 2 Q3 and Q4 in the circuit), capacitor L1 is connected to the midpoint of the first bridge arm. The thyristor device may be a field effect transistor (MOSFET) with a damping diode.

[0063] Figure 2 The isolated converter shown is a CLLC resonant converter, which may include: a filter capacitor C bus1 , inverter bridge arm, resonant capacitor C1, transformer T r , resonant capacitor C2, rectifier bridge arm, filter capacitor C bus2 Among them, the inverter bridge arm includes four thyristor devices (such as Figure 2 The inverter bridge arm is used to convert DC power into AC power. The rectifier bridge arm includes four thyristor devices (such as Figure 2 Q9 to Q 12 ), the rectifier bridge arm is used to convert AC power into DC power. Transformer T r The turns ratio of the primary coil and the secondary coil is m:n, and the transformer is used to change the AC voltage. Based on the above structure, the CLLC resonant converter converts the bus voltage V0 obtained after rectification by the PFC rectifier circuit into a charging voltage V1 that meets the requirements of the vehicle battery.

[0064] With the development of wireless charging technology, wireless charging technology can be applied not only to charging terminal devices such as mobile phones and watches, but also to charging new energy vehicles. Wireless charging technology charges the device to be charged based on the principle of electromagnetic induction. Among them, a primary coil (also called a transmitting coil) can be set in the charging device, and a secondary coil (also called a receiving coil) can be set in the device to be charged. When current passes through the primary coil, the primary coil will produce a magnetic field change. The magnetic field change causes the nearby secondary coil to generate an induced voltage, which can then generate an induced current to charge the device to be charged.

[0065] Figure 3 A schematic diagram of a vehicle wireless charging scenario provided in an embodiment of the present application. Figure 3 As shown, the charging equipment may include a charging pile and a transmitting coil set on the ground or in a parking space. The device to be charged is a vehicle. A receiving coil is installed at the bottom of the vehicle, and the receiving coil is connected to the vehicle battery through a rectifier circuit. During wireless charging, the charging pile transmits alternating current to the transmitting coil to cause the transmitting coil to generate a magnetic field change. The receiving coil at the bottom of the vehicle generates an induced current in response to the magnetic field change, which is then rectified by the rectifier circuit to charge the vehicle battery and realize power transmission.

[0066] Taking into account that existing vehicles are already equipped with the aforementioned wired charging device, when designing a wireless charging device for use on the vehicle side, it is possible to consider reusing the circuit components in the existing wired charging device to realize the wireless charging function. In this way, not only can the cost of the vehicle charging device be reduced, but also the space occupied by the vehicle charging device can be reduced.

[0067] The following is combined with Figure 4 A vehicle charging device provided in an embodiment of the present application is introduced in detail.

[0068] Figure 4 This is a schematic diagram of the structure of a vehicle charging device applied to a vehicle end provided in an embodiment of the present application. Figure 4As shown, the vehicle charging device includes: a wired charging device 10 and a first wireless charging device 20; the wired charging device 10 includes a first rectifier circuit 11 and an isolated converter 12, and the first wireless charging device includes a first rectifier circuit 11, an isolated converter 12, a wireless charging receiver 21 and a switching device 22.

[0069] The wireless charging receiver 21 is connected to the input end of the first rectifier circuit 11 through the switch device 22, the input end of the isolation converter 12 is connected to the output end of the first rectifier circuit 11, and the output end of the isolation converter 12 is connected to the vehicle battery.

[0070] The wireless charging receiver 21 is used to generate a first alternating current in response to changes in the magnetic field; the first rectifier circuit 11 is used to convert the first alternating current into a first direct current; the isolated converter 12 is used to convert the first direct current into a second direct current, and the voltage value of the second direct current meets the voltage requirement of the battery.

[0071] In practical applications, during wireless charging, the first controller of the vehicle controls the switch device to turn on, and during wired charging, the first controller controls the switch device to turn off.

[0072] In the vehicle charging device shown in this embodiment, the wireless charging device reuses the first rectifier circuit and the isolation converter in the wired charging device, and at the same time, the input end of the first rectifier circuit is connected to the wireless charging receiver through a switch device, so that the wireless or wired charging function of the vehicle can be realized by controlling the on or off of the switch device. By reusing the circuit components in the vehicle wired charging device, the cost of designing the vehicle wireless charging device can be reduced. Since only the wireless charging receiver and the switch device need to be added on the basis of the wired charging device, the space occupied by the vehicle charging device can also be reduced.

[0073] In addition, the wireless charging device of this embodiment realizes rectification by reusing the first rectifier circuit in the wired charging device, and realizes voltage regulation by reusing the isolated converter in the wired charging device. It can be understood that, according to the voltage requirements of different batteries, the first controller in the vehicle charging device can control the isolated converter so that the voltage value output by the isolated converter meets the voltage requirements of different batteries, thereby providing support for wireless charging of batteries adapted to different vehicles.

[0074] Combine the following Figure 5 and Figure 6 The structure and function of the isolated converter in the vehicle charging device are introduced in detail.

[0075] Figure 5 Schematic diagram of the structure of an isolated converter provided in an embodiment of the present application. Figure 5As shown, the isolation converter 12 may include: a first inverter circuit 121 , a transformer 122 and a second rectifier circuit 123 .

[0076] The input end of the first inverter circuit 121 is connected to the output end of the first rectifier circuit 11 , the output end of the first inverter circuit 121 is connected to the input end of the transformer 122 , and the output end of the transformer 122 is connected to the input end of the second rectifier circuit 123 .

[0077] Specifically, the first rectifier circuit 11 outputs a first direct current, the first inverter circuit 121 converts the first direct current into alternating current, and after being transformed by the transformer 122, the transformed alternating current is output to the second rectifier circuit 123, and the second rectifier circuit 123 then converts the transformed alternating current into a second direct current to achieve a voltage regulation function.

[0078] In practical applications, the first controller of the vehicle controls the switching frequency of the first inverter circuit in the isolation converter so that the isolation converter converts the first direct current into the second direct current.

[0079] Specifically, the first controller can adjust the switching frequency of the first inverter in the isolated converter according to the voltage value of the battery, and control the conduction or shutdown of the thyristor device in the first inverter according to the switching frequency. That is, the switching frequency is determined according to the voltage value of the battery. When the voltage value of the battery is too high (such as the voltage value exceeds threshold 1), the first controller increases the switching frequency to reduce the voltage value of the battery; when the voltage value of the battery is too low (such as the voltage value is lower than threshold 2), the first controller reduces the switching frequency to increase the voltage value of the battery, thereby regulating the battery charging voltage. The first controller can adjust the battery voltage value by controlling the switching frequency of the thyristor device in the isolated converter to avoid the battery voltage value being too low or too high.

[0080] It can be understood that the transformer coil turns ratio is equal to the ratio of the transformer input voltage to the output voltage (ie, the voltage ratio). Therefore, when the number of transformer coil turns is constant, the transformer voltage ratio is also constant.

[0081] Figure 6 for Figure 4 A specific structural schematic diagram of a vehicle charging device is shown in FIG. Figure 6 As shown, in the vehicle charging device, the first rectifier circuit 11 is a two-phase bridge rectifier circuit, and the isolated converter 12 is a CLLC resonant converter. These two devices reuse the wired charging device. The specific structure can be referred to Figure 2 The embodiments are not expanded here.

[0082] Figure 6In the embodiment, the switch device 22 includes: a connector, a first switch K1 and a second switch K2. One end of the connector is connected to the wireless charging receiver 21, and the other end of the connector is connected to the input end of the first rectifier circuit 11 through the first switch K1 and the second switch K2. The connector includes a plug and a socket, which are used to connect two active devices to transmit current or signals.

[0083] Figure 6 In the embodiment, the wireless charging receiver 21 includes a receiving coil and a capacitor C3. The receiving coil is installed at the bottom of the vehicle. Figure 3 As shown, the receiving coil generates a first AC value in response to the change of the magnetic field. Capacitor C3 is a resonant capacitor.

[0084] It should be pointed out that Figure 6 The first controller is not shown. The first controller is used to control the wireless charging. Figure 6 In the case of wired charging, the first switch K1 and the second switch K2 are turned on, or, in the case of wired charging, the first switch K1 and the second switch K2 are turned off. In addition, in the case of wireless charging, the first controller is also used to control Figure 6 The multiple thyristor devices (such as Figure 6 The switching frequency of Q5 to Q8 in the circuit is adjusted to adjust the voltage value at the output end of the CLLC resonant converter 12 to adapt to the voltage requirements of different batteries.

[0085] Optionally, the isolated converter 12 includes any one of the following: an LLC resonant converter, or a CLLC resonant converter, or a phase-shifted full-bridge converter. Among them, the LLC resonant converter and the CLLC resonant converter are both isolated resonant converters, and the CLLC resonant converter can refer to the attached Figure 2 Compared with the CLLC resonant converter, the LLC resonant converter has one less capacitor (such as Figure 2 The capacitor C1 is removed from the circuit). The phase-shifted full-bridge converter is a DC-DC (direct current-to-direct current) converter based on a phase-shift control strategy and is a non-resonant converter.

[0086] Optionally, the first rectifier circuit 11 includes: a three-phase bridge rectifier circuit, or a two-phase bridge rectifier circuit.

[0087] based on Figure 4In the vehicle charging device shown, in some embodiments, the first rectifier circuit 11 is a three-phase bridge rectifier circuit, and the isolated converter 12 can be an LLC resonant converter. In some embodiments, the first rectifier circuit 11 is a three-phase bridge rectifier circuit, and the isolated converter 12 is a phase-shifted full-bridge converter. In some embodiments, the first rectifier circuit 11 is a two-phase bridge rectifier circuit, and the isolated converter 12 is a CLLC resonant converter. In some embodiments, the first rectifier circuit 11 is a two-phase bridge rectifier circuit, and the isolated converter 12 is an LLC resonant converter. In some embodiments, the first rectifier circuit 11 is a two-phase bridge rectifier circuit, and the isolated converter 12 is a phase-shifted full-bridge converter.

[0088] The aforementioned embodiments show several possible configurations of the wired charging device in the vehicle charging device. The embodiments of the present application do not limit the specific structure of the wired charging device. As long as the wired charging device includes components with rectification and voltage regulation functions, it can meet the functional requirements of wireless charging.

[0089] based on Figure 4 The vehicle charging device shown, in some embodiments, further includes: a first current detection device. Figure 7 A schematic diagram of the structure of a vehicle charging device applied to a vehicle end provided in an embodiment of the present application is shown in FIG. Figure 7 As shown, a first current detection device 23 is provided between the switch device 22 and the first rectifier circuit 11, and the first current detection device 23 is used to detect the current value of the first alternating current.

[0090] In practical applications, when the current value of the first alternating current is greater than the first threshold value, the first controller of the vehicle controls the conduction or shutoff of the thyristor device in the first rectifier circuit. Figure 6 The first current detection device 23 detects the current value of the first alternating current flowing into the midpoint of the first bridge arm of the first rectifier 11 ( Figure 6 The current direction is positive), the first bridge arm is connected in series with thyristor devices Q1 and Q3. When the current value of the first alternating current is greater than the first threshold value, the first controller (not shown in the figure) controls the thyristor devices Q1 and Q4 in the first rectifier circuit 11 to turn on, and controls the thyristor devices Q2 and Q3 in the first rectifier circuit 11 to turn off, so as to achieve overcurrent protection.

[0091] Optionally, the first current detection device 23 may be a Hall device.

[0092] In this embodiment, the current value of the input first rectifier circuit (i.e., the current value of the first alternating current) is detected by a first current detection device. When the current value is greater than a preset first threshold value, the thyristor device in the first rectifier circuit can be controlled to shut down to avoid damage to the device due to excessive current, thereby realizing the overcurrent protection function.

[0093] based on Figure 4 In some embodiments, the vehicle charging device further comprises: a second current detection device. Figure 7 A second current detection device 24 is provided between the isolation converter 12 and the battery. The second current detection device 24 is used to detect the current value of the battery.

[0094] Optionally, the second current detection device 24 may be a Hall device.

[0095] In practical applications, when the current value of the battery is greater than the second threshold, the first controller of the vehicle controls the first inverter circuit in the isolation converter to shut down to avoid damaging the battery.

[0096] In this embodiment, the current value of the input battery (i.e., the charging current of the battery) is detected by the second current detection device. When the current value is greater than a preset second threshold value, the first inverter circuit in the isolated converter at the front end of the battery can be controlled to be shut down, such as shutting down all the thyristor devices in the first inverter circuit, so as to avoid excessive charging current of the battery and damage to the battery, thereby realizing the overcurrent protection function at the battery end.

[0097] In summary of the above-mentioned embodiments, the first wireless charging device in the vehicle charging device reuses the components of the existing wired charging device in the vehicle, such as the first cascaded rectifier circuit and the isolated converter in the wired charging device, and switches to wired charging or wireless charging by adding a switch device and a wireless charging receiver at the input end of the first rectifier circuit and controlling the switch state of the switch device. During wireless charging, the wireless charging receiver generates a first alternating current by receiving the magnetic field emitted by the transmitting coil at the end of the pile, and obtains a first direct current after being processed by the first rectifier circuit, and then obtains a second direct current that meets the requirements of the vehicle battery after being processed by the isolated converter, thereby realizing the wireless charging function.

[0098] In the new energy vehicle market, different vehicle manufacturers may use different battery specifications. For example, the charging voltage (or rated voltage) of the battery in vehicle 1 is 400 V, and the charging voltage of the battery in vehicle 2 is 800 V. Based on the above embodiment, the switching frequency of the thyristor device of the first inverter circuit in the isolated converter can be controlled to adjust the vehicle battery voltage to meet the battery voltage requirements of different vehicle manufacturers. The first wireless charging device can be extended to different vehicle manufacturers.

[0099] Figure 8 Flow chart of a charging control method provided in an embodiment of the present application. The charging control method of this embodiment can be applied to a first controller in a vehicle, such as Figure 8 As shown, the method comprises:

[0100] S110. During wireless charging, control the switch device to be turned on.

[0101] In some embodiments, reference Figure 6 , the switch device includes a first switch and a second switch, and during wireless charging, the first controller controls the first switch and the second switch to be turned on. In some embodiments, during wired charging, the first controller controls the switch device to be turned off. For example, referring to Figure 6 During wired charging, the first controller controls the first switch and the second switch to be turned off.

[0102] For example, see Fig.15 When a communication link has been established between the vehicle and the charging pile, in response to a user triggering a wireless charging operation, the vehicle sends a second request to the charging pile, and the second request includes relevant parameters of the vehicle-side charging device. After receiving a second response from the charging pile (indicating that wireless charging is allowed on the vehicle side), the first controller of the vehicle controls the switch device to conduct, and the vehicle performs wireless charging.

[0103] S120. After the switch device is turned on, the switching frequency of the first inverter circuit in the isolated converter is controlled so that the isolated converter converts the first alternating current into the second direct current.

[0104] The first alternating current is generated by the vehicle's wireless charging receiver in response to changes in the magnetic field, and the second direct current is the direct current input into the vehicle's battery, and the voltage value of the second direct current meets the voltage requirement of the vehicle's battery.

[0105] During the wireless charging process, the first controller can detect the voltage value input to the vehicle battery through a voltage detection device, and based on the detected voltage value, adjust the switching frequency of the thyristor device of the first inverter circuit in the isolated converter in real time so that the voltage value input to the vehicle battery meets the voltage requirement of the battery.

[0106] The switching frequency of the thyristor device of the first inverter circuit is determined according to the voltage value of the battery. The first controller can reduce the voltage value of the battery by increasing the switching frequency of the thyristor device of the first inverter circuit, or increase the voltage value of the battery by reducing the switching frequency of the thyristor device of the first inverter circuit, thereby realizing the voltage regulation function.

[0107] In some embodiments, the charging control method further includes:

[0108] S130. When the current value of the first alternating current is greater than the first threshold, control the first rectifier circuit to be turned off.

[0109] For example, refer to Figure 7The first controller obtains the current value of the first alternating current input into the first rectifier circuit through the first current detection device. When the current value of the first alternating current is greater than the first threshold value, the first controller controls the thyristor device in the first rectifier circuit to turn off to avoid damage to circuit devices due to excessive current, thereby realizing the overcurrent protection function.

[0110] In some embodiments, the charging control method further includes:

[0111] S140. When the current value of the battery is greater than the second threshold, control the first inverter circuit in the isolation converter to be turned off.

[0112] For example, refer to Figure 7 The first controller obtains the current value of the input battery through the second current detection device. When the current value of the battery is greater than the second threshold, the first controller controls all the thyristor devices of the first inverter circuit in the isolated converter to turn off, so as to avoid the battery being damaged by excessive charging current, thereby realizing the overcurrent protection function of the battery end.

[0113] The charging control method shown in the above embodiment, on the one hand, detects the current value of the first alternating current input to the first rectifier circuit, and adjusts the conduction or shutdown of the thyristor device in the first rectifier circuit according to the current value, thereby avoiding damage to the circuit device due to overcurrent. On the other hand, by detecting the current value of the battery, and adjusting the conduction or shutdown of the first inverter circuit in the isolated converter according to the current value, it is possible to avoid excessive battery charging current and damage to the battery.

[0114] At present, existing vehicles include electric drive controllers and / or range extender controllers. Among them, the electric drive controller is responsible for controlling the operation of the drive motor. According to the gear position, throttle, brake and other instructions, it converts the electric energy of the vehicle battery into the electric energy required by the drive motor to achieve the acceleration, deceleration, braking and other functions of the vehicle. The range extender controller is commonly found in extended-range electric vehicles and is responsible for controlling the start-up, operation and output power of the range extender to extend the vehicle's cruising range.

[0115] Since the power of wired charging devices is relatively low, if you want to achieve a higher-power wireless charging function and integrate the vehicle-side hardware, you can consider reusing the circuit components in the electric drive controller or extended-range controller in the existing vehicle to achieve the wireless charging function. This can not only reduce the cost of the wireless charging device, but also reduce the space occupied by the wireless charging device in the vehicle.

[0116] The following is combined with Fig. 9 Another vehicle charging device provided in an embodiment of the present application is introduced in detail.

[0117] Fig. 9 This is a schematic diagram of the structure of a vehicle charging device applied to a vehicle end provided in an embodiment of the present application. Fig. 9As shown, the vehicle charging device includes: a second wireless charging device 40. The second wireless charging device 40 includes a third rectifier circuit 41, a wireless charging receiver 21 and a switch device 22. The third rectifier circuit 41 is a rectifier circuit in the electric drive controller or the range extender controller of the vehicle. The wireless charging receiver 21 is connected to the third rectifier circuit 41 through the switch device 22, and the output end of the third rectifier circuit 41 is connected to the vehicle battery.

[0118] The wireless charging receiver 21 is used to generate a first alternating current in response to a change in the magnetic field. The third rectifier circuit 41 is used to convert the first alternating current into a second direct current, the current value of which meets the current requirement of the vehicle battery.

[0119] In practical applications, during wireless charging, the second controller of the vehicle controls the switch device to turn on, or, during wired charging, the second controller controls the switch device to turn off.

[0120] In the vehicle charging device shown in this embodiment, the wireless charging device (i.e., the second wireless charging device) reuses the rectifier circuit in the vehicle's electric drive controller or range extender controller, i.e., the third rectifier circuit, and at the same time, the input end of the third rectifier circuit is connected to the wireless charging receiver through a switch device. In this way, during wireless charging, the wireless charging function of the vehicle can be realized by controlling the switch device to be turned on. By reusing the circuit components in the vehicle's electric drive controller or range extender controller, the cost of designing the vehicle's wireless charging device can be reduced. Since only a wireless charging receiver and a switch device need to be added to the electric drive controller or range extender controller, the space occupied by the vehicle's wireless charging device can also be reduced. The wireless charging device of this embodiment is suitable for high-power wireless charging scenarios and can achieve a wireless charging power of 60kW to 120kW.

[0121] based on Fig. 9 In the vehicle charging device shown in FIG. 1 , in some embodiments, the third rectifier circuit 41 is a three-phase bridge rectifier circuit. The wireless charging receiver 21 is connected to the midpoint of any two bridge arms of the third rectifier circuit 41 through the switch device 22. Fig.10 .

[0122] It should be noted that the three-phase bridge rectifier circuit is superior to the two-phase bridge rectifier circuit in electrical performance, especially in rectification effect. The three-phase bridge rectifier circuit has higher rectification efficiency and more stable output. Therefore, the rectifier circuit in the electric drive controller or range extender controller in the current vehicle usually adopts a three-phase bridge type.

[0123] Fig.10 for Fig. 9 A specific structural schematic diagram of a vehicle charging device is shown in FIG. Fig.10As shown, the third rectifier circuit 41 may include: inductors L1 to L3, a first bridge arm, a second bridge arm, a third bridge arm and a capacitor C0, and two thyristor devices (such as Fig.10 Q1 and Q2 in the figure), the second bridge arm has two thyristor devices connected in series (such as Fig.10 Q3 and Q4 in the figure), the third bridge arm is connected in series with two thyristor devices (such as Fig.10 Q5 and Q6 in the figure), inductors L1 and L2 are connected in series between the midpoint of the second bridge arm and the midpoint of the third bridge arm, inductors L3 and L2 are connected in series between the midpoint of the first bridge arm and the midpoint of the second bridge arm, and capacitor C0 is connected in parallel with the three bridge arms. The thyristor device can be a field effect transistor (MOSFET) with a damping diode.

[0124] Fig.10 In the embodiment, the switch device 22 includes: a connector, a first switch K1 and a second switch K2. One end of the connector is connected to the wireless charging receiver 21, and the other end of the connector is connected to the midpoints of the two bridge arms of the third rectifier circuit 41 through the first switch K1 and the second switch K2. For example, the first switch K1 is connected to the midpoint of the second bridge arm, and the first switch K2 is connected to the midpoint of the first bridge arm. It should be noted that the midpoints of the two bridge arms of the third rectifier circuit 41 can be regarded as the input end of the third rectifier circuit 41.

[0125] Fig.10 In the wireless charging receiver 21, there are: a receiving coil, an inductor L4 and a capacitor C1. The inductor L4 and the capacitor C1 are connected in series at one end of the receiving coil to filter out harmonics and improve circuit performance.

[0126] It should be pointed out that Fig.10 The second controller is not shown. The second controller is used to control the wireless charging. Fig.10 In the case of wired charging, the first switch K1 and the second switch K2 are turned on, or, in the case of wired charging, the first switch K1 and the second switch K2 are turned off. In addition, in the case of wireless charging, the second controller is also used to control Fig.10 The plurality of thyristor devices (such as Fig.10 The third rectifier circuit 41 is used to adjust the current value at the output end of the third rectifier circuit 41 to avoid excessive charging current of the battery.

[0127] based on Fig. 9 The vehicle charging device shown, in some embodiments, further includes: a third current detection device. Fig.11 This is a schematic diagram of the structure of a vehicle charging device applied to a vehicle end provided in an embodiment of the present application. Fig.11As shown, a third current detection device 42 is provided between the switch device 22 and the third rectifier circuit 41. The third current detection device 42 is used to detect the current value of the first alternating current.

[0128] Optionally, the third current detection device 42 may be a Hall device.

[0129] In actual applications, the vehicle's second controller obtains the current value of the first alternating current from the third current detection device, and controls the conduction or shutdown of the thyristor devices on the two bridge arms connected to the switching device in the third rectifier circuit according to the current value of the first alternating current, so that the current value of the second direct current meets the current requirement of the vehicle battery.

[0130] In this embodiment, the third current detection device detects the current value (i.e., the current value of the first alternating current) input into the third rectifier circuit. The second controller can control the on or off of some thyristor devices in the third rectifier circuit according to the current value, thereby regulating the battery charging current and avoiding excessive charging current of the battery.

[0131] For example, continue to refer to Fig.10 , the third current detection device 42 is arranged between the first switch K1 and the midpoint of the second bridge arm of the third rectifier circuit 41. Based on this connection mode, the second controller ( Fig.10 (not shown) obtains the current value of the first alternating current flowing into the middle point of the second bridge arm of the third rectifier circuit through the third current detection device 42 ( Fig.10 The current direction is positive, when the current value of the first alternating current is greater than the third threshold value, the second controller controls the thyristor devices Q3 and Q2 in the third rectifier circuit to turn on; when the current value of the first alternating current is less than the fourth threshold value, the second controller controls the thyristor devices Q1 and Q4 in the third rectifier circuit 41 to turn on. The third threshold value is greater than the fourth threshold value.

[0132] Exemplarily, the third threshold is i1, the fourth threshold is -i1, and i1 is a positive number.

[0133] For example, if the third current detection device is set at Fig.10 The second switch K2 shown in FIG. 1 and the midpoint of the first bridge arm of the third rectifier circuit 41 ( Fig.10 Based on this connection mode, the second controller obtains the current value of the first alternating current flowing into the midpoint of the first bridge arm of the third rectifier circuit through the third current detection device ( Fig.10 The current direction from the middle switch K2 to the midpoint of the first bridge arm of the third rectifier circuit is positive), when the current value of the first alternating current is greater than the third threshold value, the second controller controls the thyristor devices Q1 and Q4 in the third rectifier circuit to be turned on; when the current value of the first alternating current is less than the fourth threshold value, the second controller controls the thyristor devices Q3 and Q2 in the third rectifier circuit to be turned on.

[0134] Based on the above two examples, the third current detection device is arranged at different positions, and the second controller controls the thyristor device in the third rectifier circuit differently.

[0135] In some embodiments, the wireless charging receiver is connected to the midpoint of the first bridge arm and the second bridge arm of the third rectifier circuit through a switch device, wherein the first bridge arm is connected in series with the first thyristor device and the second thyristor device, the second bridge arm is connected in series with the third thyristor device and the fourth thyristor device, the first thyristor device and the third thyristor device share a common anode, and the second thyristor device and the fourth thyristor device share a common cathode. The third current detection device is used to detect the current value of the first alternating current flowing into the midpoint of the first bridge arm.

[0136] Reference Fig.10 , the first thyristor device can correspond to Fig.10 Q3 in the third thyristor device can correspond to Fig.10 Q1, Q1 and Q3 share anode; the second thyristor device can correspond to Fig.10 Q4, the fourth thyristor device can correspond to Fig.10 Q2, Q2 and Q4 share a common cathode. The first bridge arm corresponds to Fig.10 The bridge arm where Q3 and Q4 are located, the second bridge arm can correspond to Fig.10 The bridge arm where Q1 and Q2 are located.

[0137] In actual applications, when the current value of the first alternating current is greater than the third threshold, the second controller of the vehicle controls the second thyristor device and the third thyristor device to be turned on; or, when the current value of the first alternating current is less than the fourth threshold, the second controller controls the first thyristor device and the fourth thyristor device to be turned on.

[0138] Through the above control, on the one hand, the loss of circuit components can be reduced, and on the other hand, the current value of the second direct current output by the third rectifier circuit can be prevented from being too large, thereby protecting the battery.

[0139] It should be noted that when the current value of the first alternating current is between the third threshold value and the fourth threshold value, the second controller does not need to perform device control, and at this time the thyristor device in the third rectifier circuit is naturally turned on or off.

[0140] In some embodiments, if an abnormality occurs in a thyristor device, such as the case where both the thyristor devices on the first bridge arm and the second bridge arm are turned on, the second controller controls all the thyristor devices on the first bridge arm and the second bridge arm (including the first thyristor device, the second thyristor device, the third thyristor device and the fourth thyristor device) to be turned off to prevent the bridge arm from being turned on directly and damaging the device.

[0141] Fig.12Flow chart of a charging control method provided in an embodiment of the present application. The charging control method of this embodiment can be applied to a second controller in a vehicle, such as Fig.12 As shown, the method comprises:

[0142] S210. During wireless charging, control the switch device to be turned on.

[0143] In some embodiments, reference Fig.10 The switch device includes a first switch and a second switch. During wireless charging, the second controller controls the first switch and the second switch to be turned on.

[0144] In some embodiments, during wired charging, the second controller controls the switch device to turn off. Fig.10 During wired charging, the second controller controls the first switch and the second switch to be turned off.

[0145] S220. After the switch device is turned on, the thyristor devices on the two bridge arms connected to the switch device in the third rectifier circuit are controlled to be turned on or off according to the current value of the first alternating current, so that the current value of the second direct current meets the current requirement of the vehicle battery.

[0146] The first alternating current is generated by a wireless charging receiver of the vehicle in response to a change in a magnetic field.

[0147] In some embodiments, the two bridge arms connected to the switch device in the third rectifier circuit include a first bridge arm and a second bridge arm; the first bridge arm is connected in series with a first thyristor device and a second thyristor device, and the second bridge arm is connected in series with a third thyristor device and a fourth thyristor device, the first thyristor device and the third thyristor device share a common anode, and the second thyristor device and the fourth thyristor device share a common cathode. S220, including:

[0148] When the current value of the first alternating current input to the midpoint of the first bridge arm is greater than the third threshold, the second thyristor device and the third thyristor device are controlled to be turned on; or, when the current value of the first alternating current input to the midpoint of the first bridge arm is less than the fourth threshold, the first thyristor device and the fourth thyristor device are controlled to be turned on. The third threshold is greater than the fourth threshold.

[0149] The charging control method shown in the above embodiment detects the current value of the first alternating current input into the third rectifier circuit, and adjusts the conduction or shutdown of the thyristor device in the third rectifier circuit according to the current value, so as to adjust the current value of the battery, thereby avoiding damage to the battery due to excessive charging current.

[0150] The above embodiments show two types of vehicle charging devices, one of which can realize wireless charging function by reusing the circuit components of the on-board charger OBC, and can realize voltage and current regulation control, and can adapt to multiple vehicle voltage platforms (such as low-voltage platform 400V, high-voltage platform 800V). The other can realize wireless charging function by reusing the circuit components of the electric drive controller or the range extender controller, which is suitable for high-power wireless charging scenarios.

[0151] Since the first vehicle charging device can adjust the battery voltage by controlling the isolated converter, a 1-to-N integrated wireless charging solution can be designed based on the first vehicle charging device, which is suitable for wireless charging of vehicles from different manufacturers. Where N is a positive integer greater than 1.

[0152] In this regard, the embodiment of the present application shows a vehicle charging device applied to a charging pile, including a front-stage rectifier circuit and a rear-stage inverter circuit. By adding N switches at the output end of the inverter circuit, each switch is connected to a transmitting coil, and the transmitting coils can be arranged on N parking spaces respectively. In this way, by controlling the closing or opening of the N switches, wireless charging can be achieved for different vehicles in multiple parking spaces at the same time.

[0153] It should be pointed out that in order to realize wireless charging of different vehicles, the vehicle end can use the aforementioned Figures 4 to 7 In the first vehicle charging device shown, the vehicle end itself performs voltage and current regulation control.

[0154] The following is combined with Fig.13 A vehicle charging device applied to a charging pile end is described.

[0155] Fig.13 This is a schematic diagram of the structure of a vehicle charging device applied to a charging pile provided in an embodiment of the present application. Fig.13 The vehicle charging device of this embodiment includes: a fourth rectifier circuit 60, a second inverter circuit 70, N switches (such as Fig.13 K1, K2…K N ), N transmitting coils. The input end of the fourth rectifier circuit 60 is connected to the power grid, the output end of the fourth rectifier circuit 60 is connected to the input end of the second inverter circuit 70, the output end of the second inverter circuit 70 is respectively connected to the N transmitting coils, and a switch is provided between each transmitting coil and the second inverter circuit 70.

[0156] The fourth rectifier circuit 60 is used to convert the second alternating current of the power grid into a third direct current; the second inverter circuit 70 is used to convert the third direct current into a third alternating current; and the transmitting coil is used to generate a magnetic field change based on the third alternating current.

[0157] Optionally, the fourth rectifier circuit 60 may be a three-phase bridge rectifier circuit, or a two-phase bridge rectifier circuit.

[0158] Optionally, the N transmitting coils have the same number of turns.

[0159] In actual application, the third controller at the pile end controls the switch corresponding to the target transmitting coil to be turned on according to the position of the target vehicle, wherein the target vehicle is a vehicle to be wirelessly charged, and the target transmitting coil is a transmitting coil corresponding to the position of the target vehicle.

[0160] The vehicle charging device shown in this embodiment reuses a set of rectifier circuits and inverter circuits for multiple parking spaces, which can reduce the cost of the vehicle charging device at the charging station. When vehicles in multiple parking spaces all need wireless charging, the corresponding multiple switches can be controlled to be turned on so that the corresponding multiple transmitting coils generate magnetic field changes, thereby realizing wireless charging for multiple vehicles at the same time.

[0161] Correspondingly, vehicles in different parking spaces can adjust the battery voltage or current by controlling the switching frequency of the thyristor device on the isolated converter in the vehicle charging device to meet the charging needs of different vehicle batteries.

[0162] based on Fig.13 The vehicle charging device shown in the embodiment of the present application provides a charging control method, which can be applied to the third controller of the charging pile end. The method includes: controlling the switch corresponding to the target transmitting coil to be turned on according to the position of the target vehicle.

[0163] The target vehicle is a vehicle that is being wirelessly charged, and the target transmitting coil is a transmitting coil corresponding to the position of the target vehicle.

[0164] In some embodiments, after the target vehicle establishes a connection with the pile end, the target vehicle sends the target vehicle position to the pile end, so that the third controller of the pile end controls the switch of the transmitting coil corresponding to the target vehicle position based on the target vehicle position. Fig.15 Example.

[0165] The charging control method shown in the above embodiment can realize wireless charging for multiple vehicles at the same time.

[0166] Fig.14 A schematic diagram of a vehicle wireless charging scenario provided in an embodiment of the present application. Fig.14 As shown, the scene includes a charging pile and N parking spaces. The charging pile includes a fourth rectifier circuit 60, a second inverter circuit 70, a third controller 80 and N switches. A transmitting coil is set on the ground of each parking space, and each transmitting coil is connected to a switch in the charging pile.

[0167] In one possible scenario, Fig.14As shown, vehicle 1 and vehicle 2 are parked in two parking spaces respectively, and both vehicle 1 and vehicle 2 need wireless charging. At this time, the third controller 80 controls the K1 switch corresponding to the transmitting coil 1 and the K2 switch corresponding to the transmitting coil 2 to be turned on, so that the transmitting coil 1 and the transmitting coil 2 respectively generate magnetic field changes, thereby realizing wireless charging for the two vehicles at the same time.

[0168] Accordingly, the receiving coil in the charging device of vehicle 1 responds to the change of the magnetic field to generate alternating current, which is rectified by the rectifier circuit at the rear end of the receiving coil, and then regulated by the isolated converter to charge the vehicle battery (or supply power to the high-voltage components of the whole vehicle). The charging device of vehicle 2 can refer to vehicle 1.

[0169] In this embodiment, the charging devices of vehicle 1 and vehicle 2 are the aforementioned Figures 4 to 7 The vehicle charging device shown.

[0170] The following is combined with Fig.15 The communication interaction process between the vehicle 1 and the charging pile is described.

[0171] Fig.14 This is a schematic diagram of an interaction of wireless charging of a vehicle provided in an embodiment of the present application. Fig.15 As shown, the interactive process of vehicle wireless charging includes:

[0172] S310. After the vehicle 1 is parked in the parking space 1, in response to the connection operation triggered by the user, the vehicle 1 sends a first request to the charging pile, where the first request is used to request to establish a communication link with the charging pile.

[0173] Exemplarily, the vehicle 1 can establish a communication link with the charging pile through near field communication means, such as Bluetooth, Wi-Fi (Wireless Fidelity) or Near Link and other communication technologies.

[0174] S320. The charging pile sends a first response to the vehicle 1 in response to the first request, where the first response is used to indicate that a communication link has been established.

[0175] S330 . In response to the wireless charging operation triggered by the user, the vehicle 1 sends a second request to the charging pile, where the second request includes relevant parameters of the charging device of the vehicle 1 .

[0176] Exemplarily, in response to a wireless charging operation triggered by a user on the display screen of vehicle 1, or in response to a wireless charging operation input by a user's voice, or in response to a user's air gesture operation within the range of the vehicle's camera (for example, the air gesture is spreading five fingers to trigger the vehicle's wireless charging function), vehicle 1 sends a second request to the charging pile.

[0177] The parameters related to the charging device of vehicle 1 include, but are not limited to: the charging parameters of the vehicle battery (such as voltage, current or power parameters), the type of the vehicle wireless charging device, etc. For example, the wireless charging device of vehicle 1 adopts Figures 4 to 7 The wireless charging device shown.

[0178] S340. Based on the second request, the charging pile confirms whether the charging device of vehicle 1 matches the charging pile.

[0179] In some examples, the charging pile determines whether it matches the charging pile based on the type of the wireless charging device of vehicle 1 in the second request. If the type of the wireless charging device of vehicle 1 is a preset type (such as Figures 4 to 7 If the type of the wireless charging device of vehicle 1 is not a preset type (such as Figures 9 to 11 If a wireless charging device is shown in FIG. 1 , it is determined that the charging device of vehicle 1 does not match the charging pile.

[0180] If the charging device of vehicle 1 matches the charging pile, execute:

[0181] S350a. The charging pile sends a second response to the vehicle 1, where the second response is used to indicate that the vehicle 1 is allowed to perform wireless charging.

[0182] Exemplarily, based on the second response, vehicle 1 may pop up a window on the display screen of vehicle 1, with “Allow vehicle wireless charging” displayed on the window, or vehicle 1 may announce “Allow vehicle wireless charging” through a speaker.

[0183] If the charging device of vehicle 1 does not match the charging pile, execute:

[0184] S350b. The charging pile sends a third response to the vehicle 1, where the third response is used to indicate that the vehicle 1 is not allowed to perform wireless charging.

[0185] Exemplarily, based on the third response, vehicle 1 may pop up a window on the display screen of vehicle 1, with the window displaying “Vehicle wireless charging is not allowed”, or vehicle 1 may announce “Vehicle wireless charging is not allowed” through a speaker.

[0186] After S350a, the following is also executed:

[0187] S360. Vehicle 1 sends vehicle location information to the charging pile.

[0188] After the vehicle 1 obtains the vehicle position information through the vehicle positioning system, it sends the vehicle position information to the charging pile. The vehicle position information may include, for example, the latitude and longitude information of the vehicle.

[0189] S370. Based on the vehicle position information, the charging pile controls the switch corresponding to the transmitting coil corresponding to the position of the vehicle 1 to turn on.

[0190] After the switch corresponding to the transmitting coil corresponding to the position of vehicle 1 is turned on, the charging pile can wirelessly charge vehicle 1. The charging principle can be referred to Fig.14 The embodiments shown will not be described in detail here.

[0191] When vehicles in other parking spaces need wireless charging, the above interaction process can be reused to communicate with the charging pile to trigger the charging pile to wirelessly charge the vehicle in the parking space.

[0192] An embodiment of the present application provides a vehicle, comprising: a vehicle charging device as shown in any one of the aforementioned embodiments.

[0193] An embodiment of the present application provides a charging control device, including: a memory and a processor; the processor is used to couple with the memory, read and execute instructions in the memory, so as to implement the steps of the charging control method in the above method embodiment. Its implementation principle and technical effect are similar to those of the above-mentioned related embodiments, and will not be repeated here.

[0194] An embodiment of the present application also provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are executed, the steps of the charging control method in the above method embodiment are implemented. The implementation principle and technical effects are similar to those of the above-mentioned related embodiments, and are not repeated here.

[0195] An embodiment of the present application also provides a computer program product, which includes a computer program. When the computer program is executed, the steps of the charging control method in the above method embodiment are implemented. The implementation principle and technical effects are similar to those of the above-mentioned related embodiments and are not repeated here.

[0196] The embodiment of the present application provides a chip. The chip includes a processor, which is used to call a computer program in a memory to execute the steps of the charging control method in the above method embodiment. Its implementation principle and technical effect are similar to those of the above related embodiments and will not be repeated here.

[0197] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive Solid State Disk (SSD)), etc.

[0198] The term "plurality" in this article refers to two or more than two. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship; in the formula, the character " / " indicates that the previous and next associated objects are in a "division" relationship. In addition, it should be understood that in the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0199] It is understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. It is understood that in the embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Claims

1. A vehicle charging device, characterized in that: include: A first wireless charging device; the first wireless charging device comprises a first rectifier circuit, an isolation converter, a wireless charging receiver and a switch device; The first rectifier circuit and the isolated converter are circuit components of a wired charging device in a vehicle; The wireless charging receiver is connected to the input end of the first rectifier circuit through the switch device, the input end of the isolation converter is connected to the output end of the first rectifier circuit, and the output end of the isolation converter is connected to the vehicle battery; The wireless charging receiver is used to generate a first alternating current in response to a change in a magnetic field; The first rectifier circuit is used to convert the first alternating current into a first direct current; The isolated converter is used to convert the first direct current into a second direct current, and the voltage value of the second direct current meets the voltage requirement of the battery.

2. The device according to claim 1, characterized in that The isolated converter includes any one of the following: LLC resonant converter, or CLLC resonant converter, or phase-shifted full-bridge converter.

3. The device according to claim 1, characterized in that The isolated converter comprises: a first inverter circuit, a transformer and a second rectifier circuit; The input end of the first inverter circuit is connected to the output end of the first rectifier circuit, the output end of the first inverter circuit is connected to the input end of the transformer, and the output end of the transformer is connected to the input end of the second rectifier circuit.

4. The device according to any one of claims 1 to 3, characterized in that The vehicle charging device further includes: a first current detection device, which is arranged between the switch device and the first rectifier circuit, and is used to detect the current value of the first alternating current.

5. The device according to any one of claims 1 to 3, characterized in that: The vehicle charging device further includes: a second current detection device, which is arranged between the isolation converter and the battery, and is used to detect the current value of the battery.

6. The device according to claim 1, characterized in that The first rectifier circuit includes: a three-phase bridge rectifier circuit, or a two-phase bridge rectifier circuit.

7. The device according to claim 1, characterized in that The switch device comprises: a plug-in component, a first switch and a second switch; one end of the plug-in component is connected to the wireless charging receiver, and the other end of the plug-in component is connected to the input end of the first rectifier circuit through the first switch and the second switch; During wireless charging, the first switch and the second switch are turned on; During wired charging, the first switch and the second switch are turned off.

8. A vehicle, characterized in that: include: A vehicle charging device as claimed in any one of claims 1 to 7.

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