CN-121984247-A - Control circuit and control method of charging device and vehicle

Abstract

The application discloses a control circuit and a control method of a charging device and a vehicle. The control circuit of the charging device comprises a first current conversion circuit, a second current conversion circuit, a load circuit and a switch circuit, wherein the input end of the first current conversion circuit is used for being connected with the charging device, the input end of the second current conversion circuit is used for being connected with the charging device, the first input end of the load circuit is connected with the first output end of the first current conversion circuit and the second output end of the second current conversion circuit, the second input end of the load circuit is connected with the first output end of the first current conversion circuit and the second output end of the second current conversion circuit, the output end of the load circuit is connected with a target battery, and the control end of the switch circuit is connected with the first input end of the load circuit and the second input end of the load circuit. The application solves the technical problem of lower charging efficiency of the target battery in the related technology.

Inventors

• WANG RUIQI
• WEN WEI
• GU JIE
• CHEN HAO

Assignees

• 广州小鹏汽车科技有限公司

Dates

Publication Date

20260505

Application Date

20260105

Claims (13)

1. 1. A control circuit of a charging device, comprising: the charging device comprises a first current conversion circuit, a second current conversion circuit and a first voltage conversion circuit, wherein the input end of the first current conversion circuit is used for being connected with the charging device and used for obtaining first alternating current by electrically isolating initial alternating current input by the charging device, and the first alternating current is used for representing alternating current suitable for a wired charging mode; The input end of the second current conversion circuit is used for being connected with the charging device and carrying out wireless power transmission isolation on the initial alternating current input by the charging device to obtain second alternating current, wherein the second alternating current is used for representing alternating current which is adapted to a wireless charging mode; The first input end of the load circuit is connected with the first output end of the first current conversion circuit and the second output end of the second current conversion circuit, the second input end of the load circuit is connected with the first output end of the first current conversion circuit and the second output end of the second current conversion circuit, the output end of the load circuit is connected with a target battery, and the load circuit is used for carrying out resonance conversion on the first alternating current or the second alternating current to obtain a target direct current and charging the target battery according to the target direct current; The control end of the switching circuit is connected with the first input end of the load circuit and the second input end of the load circuit, the switching circuit is used for controlling the first input end of the load circuit to be conducted with the output end of the first current conversion circuit under the condition that a first charging instruction is received, and controlling the second input end of the load circuit to be conducted with the output end of the second current conversion circuit under the condition that a second charging instruction is received, wherein the first charging instruction is used for representing a charging instruction of a wired charging mode, and the second charging instruction is used for representing a charging instruction of a wireless charging mode.
2. 2. The control circuit of a charging device according to claim 1, wherein the first current conversion circuit includes: The input end of the first filtering device is connected with the charging device, and the first filtering device is used for filtering the initial alternating current to obtain first filtering alternating current; The input end of the first correction circuit is connected with the output end of the first filtering device, and the first correction circuit is used for performing current conversion on the first filtering alternating current based on the target voltage of the charging device to obtain a first filtering direct current; The input end of the first inverter circuit is connected with the output end of the first correction circuit, the output end of the first inverter circuit is connected with the first output end and the second output end of the first current conversion circuit, and the first inverter circuit is used for carrying out voltage conversion on the first filtering direct current through the first switch controller to obtain the first alternating current.
3. 3. The control circuit of a charging device according to claim 1, wherein the second current conversion circuit includes: the input end of the second filtering device is connected with the charging device, and the second filtering device is used for filtering the initial alternating current to obtain second filtering alternating current; The input end of the second correction circuit is connected with the output end of the second filtering device, and the second correction circuit is used for performing current conversion on the second filtering alternating current based on the target voltage of the charging device to obtain second filtering direct current; The input end of the second inverter circuit is connected with the output end of the second correction circuit, the first output end of the second inverter circuit is connected with the first output end of the second current conversion circuit, the second output end of the second inverter circuit is connected with the second output end of the second current conversion circuit, and the second inverter circuit is used for carrying out voltage conversion transmission on the second filtering direct current by utilizing a second switch controller and a magnetic field energy transmission coupler to obtain second alternating current and transmitting the second alternating current through a magnetic field.
4. 4. The control circuit of a charging device according to claim 3, wherein the second inverter circuit includes: The input end of the second switch controller is connected with the output end of the second correction circuit, and the second switch controller is used for performing voltage conversion on the second filtering direct current to obtain the second alternating current circuit; The magnetic field energy transfer coupler is characterized in that a first input end of the magnetic field energy transfer coupler is connected with a first output end of the second switch controller, a second input end of the magnetic field energy transfer coupler is connected with a second output end of the second switch controller, a first output end of the magnetic field energy transfer coupler is connected with a first output end of the second inverter circuit, a second output end of the magnetic field energy transfer coupler is connected with a second output end of the second inverter circuit, and the magnetic field energy transfer coupler is used for transmitting the second alternating current through a magnetic field.
5. 5. The control circuit of a charging device according to claim 4, wherein the magnetic field energy transfer coupler comprises: the first end of the first resonant inductor is connected with the first input end of the magnetic field energy-transfer coupler; the first end of the first resonance capacitor is connected with the second end of the first resonance inductor, and the second end of the first resonance capacitor is connected with the second input end of the magnetic field energy transmission coupler; The first end of the first compensation capacitor is connected with the second end of the first resonance inductor; the first end of the first coil self-inductance is connected with the second end of the first compensation capacitor, and the second end of the first coil self-inductance is connected with the second end of the first resonance inductor; a second coil self-inductance, the second coil self-inductance being mutually inductive with the first coil self-inductance; the first end of the second compensation capacitor is connected with the first end of the second coil self-inductance; The first end of the second resonance capacitor is connected with the second end of the second compensation capacitor and the first output end of the magnetic field energy transfer coupler, and the second end of the second resonance capacitor is connected with the second end of the second coil self-inductance and the second output end of the magnetic field energy transfer coupler.
6. 6. The control circuit of a charging device according to claim 1, wherein the load circuit comprises: the input end of the resonance conversion circuit is connected with the output end of the first current conversion circuit and the output end of the second current conversion circuit, and is used for carrying out resonance voltage reduction filtering on the first alternating current or the second alternating current to obtain resonance filtering alternating current, wherein the resonance voltage reduction filtering is used for carrying out voltage reduction and filtering on the first alternating current or the second alternating current in a resonance mode; And the input end of the rectifying circuit is connected with the output end of the resonant conversion circuit, and the output end of the rectifying circuit is connected with the output end of the load circuit and is used for carrying out current conversion on the resonant filtering alternating current to obtain the target direct current.
7. 7. The control circuit of a charging device according to claim 6, wherein the resonance converting circuit includes: The first end of the resonant inductor is connected with the first output end of the first current conversion circuit and is used for constructing a first resonant network, or the first end of the resonant inductor is connected with the first output end of the second current conversion circuit and is used for constructing a second resonant network, wherein the first resonant network is used for carrying out resonant buck filtering on the first alternating current so as to obtain resonant filtering alternating current, and the second resonant network is used for carrying out resonant buck filtering on the second alternating current so as to obtain resonant filtering alternating current; The first end of the excitation inductor is connected with the second end of the resonance inductor, the second end of the excitation inductor is connected with the second output end of the first current conversion circuit, or the second end of the excitation inductor is connected with the second output end of the second current conversion circuit, and the excitation inductor is used for realizing electrical isolation of the first resonance network or the second resonance network.
8. 8. A control method of a charging device, characterized by being applied to the control circuit of a charging device according to any one of claims 1 to 5, comprising: In response to receiving a first charging instruction, controlling a first input end in a control circuit of the charging device to be conducted with an output end of a first current conversion circuit, and electrically isolating an initial alternating current input by the charging device to obtain a first alternating current, wherein the first charging instruction is used for representing a charging instruction of a wired charging mode; In response to receiving a second charging instruction, controlling a second input end in a control circuit of the charging device to be conducted with an output end of a second current conversion circuit, and performing wireless power transmission isolation on an initial alternating current input by the charging device to obtain a second alternating current, wherein the first charging instruction is used for representing a charging instruction of a wireless charging mode; carrying out resonance conversion on the first alternating current or the second alternating current to obtain a target direct current; and charging the target battery according to the target direct current.
9. 9. The method of claim 8, wherein electrically isolating the initial ac current input to the charging device to obtain the first ac current, comprises: Filtering the initial alternating current to obtain a first filtered alternating current; Performing current conversion on the first filtering alternating current based on the target voltage of the charging device to obtain a first filtering direct current; and performing voltage conversion on the first filtering direct current by using a switch controller to obtain the first alternating current.
10. 10. The method of claim 8, wherein electrically isolating the initial ac current input to the charging device to obtain the second ac current, comprises: filtering the initial alternating current to obtain a second filtered alternating current; Performing current conversion on the second filtering alternating current based on the target voltage of the charging device to obtain a second filtering direct current; and performing voltage conversion on the second filtering direct current by using a magnetic field energy-transfer coupler to obtain the second alternating current.
11. 11. A vehicle, characterized by comprising: a memory storing an executable program; a processor for executing the program, wherein the program when run performs the method of any of claims 8 to 10.
12. 12. A computer readable storage medium, characterized in that the computer readable storage medium comprises a stored executable program, wherein the executable program when run controls a device in which the storage medium is located to perform the method of any one of claims 8 to 10.
13. 13. A computer program product comprising a computer program which, when executed by a processor, implements the method according to any one of claims 8 to 10.

Description

Control circuit and control method of charging device and vehicle Technical Field The application relates to the field of charging, in particular to a control circuit and a control method of a charging device and a vehicle. Background In the current electric automobile field, the charging system of the target battery faces the problems of complex structure, high cost and poor efficiency. Especially when the vehicle needs to support both wired and wireless charging, the conventional approach is to design two independent charging architectures, which not only increases the burden of the vehicle space and the hardware cost, but also means additional energy loss, thereby resulting in lower charging efficiency of the battery. In view of the above problems, no effective solution has been proposed at present. Disclosure of Invention The embodiment of the application provides a control circuit and a control method of a charging device and a vehicle, which are used for at least solving the technical problem of low charging efficiency of a target battery in the related art. According to one aspect of the embodiment of the application, a control circuit of a charging device is provided, which comprises a first current conversion circuit, a second current conversion circuit and a control circuit, wherein an input end of the first current conversion circuit is used for being connected with the charging device and is used for obtaining a first alternating current by electrically isolating an initial alternating current input by the charging device, and the first alternating current is used for representing alternating current which is suitable for a wired charging mode; the charging device comprises a charging device, a first current conversion circuit, a second current conversion circuit, a switch circuit, a switching circuit and a control circuit, wherein the input end of the first current conversion circuit is used for being connected with the charging device and carrying out wireless electric energy transmission isolation on initial alternating current input by the charging device to obtain second alternating current, the second alternating current is used for representing alternating current which is adaptive to a wireless charging mode, the first input end of the load circuit is connected with the first output end of the first current conversion circuit and the second output end of the second current conversion circuit, the second input end of the load circuit is connected with the first output end of the first current conversion circuit and the second output end of the second current conversion circuit, the output end of the load circuit is connected with a target battery, the load circuit is used for carrying out resonance conversion on the first alternating current or the second alternating current to obtain target direct current, and charging the target battery according to the target direct current, the switch circuit is used for controlling the first input end of the load circuit and the second input end of the load circuit to be connected with the first input end of the first current conversion circuit under the condition that a first charging command is received, the second input end of the first current conversion circuit is controlled to be conducted under the condition that the first charging command is received, the second input end of the second current conversion circuit is controlled to be conducted under the condition that the second input end of the first charging command is conducted, the first charging instruction is used for indicating a charging instruction of a wired charging mode, and the second charging instruction is used for indicating a charging instruction of a wireless charging mode. According to another aspect of the embodiment of the application, a control method of a charging device is provided, which is applied to a control circuit of the charging device, and comprises the steps of responding to a first charging instruction, controlling a first input end of the control circuit of the charging device to be conducted with an output end of a first current conversion circuit, electrically isolating an initial alternating current input by the charging device to obtain a first alternating current, wherein the first charging instruction is used for indicating a charging instruction of a wired charging mode, responding to a second charging instruction, controlling a second input end of the control circuit of the charging device to be conducted with an output end of a second current conversion circuit, conducting wireless power transmission isolation on the initial alternating current input by the charging device to obtain a second alternating current, wherein the first charging instruction is used for indicating a charging instruction of a wireless charging mode, conducting resonance conversion on the first alternating current or the second alternating current to obtain a target direct curr