Charging circuit, charging device and vehicle

Abstract

The utility model discloses a charging circuit, a charging device and a vehicle. The charging circuit may include a power supply circuit, a master protocol chip, and at least one slave protocol chip. The power supply circuit is configured to be connected with external equipment. The main protocol chip is connected with the power supply circuit, and under the condition that the charging protocol of the external equipment is matched with the charging protocol of the main protocol chip, the main protocol chip controls the power supply circuit to output charging voltage corresponding to the main protocol chip to the external equipment. The main protocol chip is in communication connection with at least one slave protocol chip, and under the condition that the charging protocol of the external equipment is matched with the charging protocol of any slave protocol chip, the main protocol chip controls the power supply circuit to output charging voltage corresponding to the slave protocol chip to the external equipment. The charging circuit can be matched with the charging protocol of the master protocol chip and can also be matched with the charging protocol of any one or more slave protocol chips, and the charging circuit can meet the diversified high-power charging requirements of the charging protocols.

Description

Technical Field

[0001] The present application relates to the technical field of charging circuits, and more particularly, to a charging circuit, a charging device, and a vehicle. Background Art

[0002] On the one hand, there are more and more charging protocols. On the other hand, in the related art, the charging protocols matched by the charging circuit are relatively single, resulting in a relatively low charging power when the charging circuit uses other charging protocols, and the charging interface cannot meet the high-power charging requirements of diverse charging protocols. Summary of the Utility Model

[0003] Embodiments of the present application provide a charging circuit, a charging device, and a vehicle.

[0004] The charging circuit provided by the embodiments of the present application may include a power supply circuit, a main protocol chip, and at least one slave protocol chip. Among them, the power supply circuit is configured to connect to an external device. The main protocol chip is connected to the power supply circuit. When the charging protocol of the external device matches the charging protocol of the main protocol chip, the main protocol chip controls the power supply circuit to output a charging voltage corresponding to the main protocol chip to the external device. The main protocol chip is communicatively connected to at least one slave protocol chip. When the charging protocol of the external device matches the charging protocol of any one of the slave protocol chips, the main protocol chip controls the power supply circuit to output a charging voltage corresponding to the slave protocol chip to the external device.

[0005] In this way, the charging circuit provided by the embodiments of the present application can match the charging protocol of the main protocol chip, and can also match the charging protocol of any one or more slave protocol chips. The charging circuit can meet the high-power charging requirements of diverse charging protocols, ensuring the best charging rate while also ensuring the safety of charging.

[0006] In some embodiments, the power supply circuit includes a voltage conversion circuit, and the voltage conversion circuit is connected to the external device. The main protocol chip is connected to the voltage conversion circuit, and the main protocol chip is configured to control the voltage conversion circuit to convert the input voltage into the charging voltage of the external device according to the charging protocol matched by the external device.

[0007] In some embodiments, the voltage conversion circuit is configured to convert the input voltage into the power supply voltage of the main protocol chip, or the power supply voltage of at least one of the slave protocol chips.

[0008] In some embodiments, the power supply circuit includes a switch circuit, and the switch circuit is connected between the voltage conversion circuit and the charging port. When the charging port is connected to the external device, the main protocol chip controls the switch circuit to conduct.

[0009] In some embodiments, the power supply circuit includes a detection circuit configured to detect the charging current of the external device. When the charging current does not match the charging protocol of the external device, the main protocol chip controls the switching circuit to disconnect.

[0010] In some embodiments, the detection circuit includes a sampling resistor, and the output terminal of the power supply circuit is grounded through the sampling resistor.

[0011] In some embodiments, when the charging voltage does not match the charging protocol of the external device, at least one of the slave protocol chips controls the switching circuit to disconnect.

[0012] In some embodiments, the power supply circuit includes a battery and a protection circuit. The battery is connected to the voltage conversion circuit through the protection circuit, and the protection circuit is configured to disconnect when the battery is reversely connected.

[0013] In some embodiments, the power supply circuit includes a battery and a filtering circuit. The battery is connected to the voltage conversion circuit through the filtering circuit, and the filtering circuit is configured to filter the voltage of the battery and provide it to the voltage conversion circuit.

[0014] In some embodiments, the main protocol chip is configured to be a chip matching the Huawei charging protocol, and the slave protocol chip is configured to be a chip matching the Xiaomi charging protocol and the OPPO charging protocol.

[0015] In some embodiments, the main protocol chip includes a Huawei charging protocol chip with the model number SPSQ8841, and the slave protocol chip includes a Xiaomi private protocol chip with the model number SC2021QQDER.

[0016] An embodiment of the present application further provides a charging device, which includes the charging circuit of the above embodiment.

[0017] An embodiment of the present application further provides a vehicle, which includes the charging device or the charging circuit of the above embodiment.

[0018] In the charging circuit, charging device, and vehicle provided by the embodiments of the present application, the charging circuit may include a power supply circuit, a main protocol chip, and at least one slave protocol chip. Among them, the power supply circuit is configured to connect to an external device. The main protocol chip is connected to the power supply circuit. When the charging protocol of the external device matches the charging protocol of the main protocol chip, the main protocol chip controls the power supply circuit to output a corresponding charging voltage to the external device. The main protocol chip is communicatively connected to at least one slave protocol chip. When the charging protocol of the external device matches the charging protocol of any one of the slave protocol chips, the main protocol chip controls the power supply circuit to output a corresponding charging voltage to the external device.

[0019] In this way, the charging circuit provided by the embodiments of the present application can match the charging protocol of the main protocol chip or the charging protocol of any one or more slave protocol chips. The charging circuit can meet the high-power charging requirements with diverse charging protocols, ensuring the best charging rate while also ensuring charging safety.

[0020] Additional aspects and advantages of the embodiments of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0022] Figure 1 is a schematic diagram of the charging circuit according to an embodiment of the present application;

[0023] Figure 2 is a schematic diagram of the charging device according to some embodiments of the present application;

[0024] Figure 3 is a schematic diagram of the charging port of the charging device according to some embodiments of the present application;

[0025] Figure 4-1 is a first schematic diagram of the main protocol chip and its peripheral circuit according to some embodiments of the present application;

[0026] Figure 4-2 is a second schematic diagram of the main protocol chip and its peripheral circuit according to some embodiments of the present application;

[0027] Figure 4-3 is a third schematic diagram of the main protocol chip and its peripheral circuit according to some embodiments of the present application;

[0028] Figure 5-1 is a first schematic diagram of the slave protocol chip and its peripheral circuit according to some embodiments of the present application;

[0029] Figure 5-2 It is the second schematic diagram of the slave protocol chip and its peripheral circuit of some embodiments of the present application;

[0030] Figure 6 It is the schematic diagram of the power supply circuit of the embodiment of the present application;

[0031] Figure 7-1 It is the first schematic diagram of the voltage conversion circuit of some embodiments of the present application;

[0032] Figure 7-2 It is the second schematic diagram of the voltage conversion circuit of some embodiments of the present application;

[0033] Figure 8 It is the schematic diagram of the protection circuit and the filter circuit of some embodiments of the present application;

[0034] Figure 9 It is the schematic diagram of the vehicle of the embodiment of the present application.

[0035] Description of main component symbols:

[0036] Power supply circuit 100, main protocol chip 200, slave protocol chip 300, voltage conversion circuit 110, switch circuit 120, detection circuit 130, sampling resistor 131, protection circuit 141, filter circuit 142, battery 150, charging circuit 1000, external device 2000, charging device 1100, charging port 1200, vehicle 1300. Specific embodiments

[0037] The following details the embodiments of the present application. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are optional and are only used to explain the embodiments of the present application and should not be construed as a limitation to the embodiments of the present application.

[0038] On the one hand, there are more and more charging protocols. On the other hand, in the related art, the charging protocol matched by the charging circuit is relatively single, resulting in a low charging power when the charging circuit charges with other charging protocols, and the charging interface cannot meet the high-power charging requirements of diverse charging protocols.

[0039] Please refer to Figure 1, an embodiment of the present application provides a charging circuit 1000. The charging circuit 1000 may include a power supply circuit 100, a main protocol chip 200, and at least one slave protocol chip 300. Among them, the power supply circuit 100 is configured to be connected to an external device 2000. The main protocol chip 200 is connected to the power supply circuit 100. When the charging protocol of the external device 2000 matches the charging protocol of the main protocol chip 200, the main protocol chip 200 controls the power supply circuit 100 to output a charging voltage corresponding to the main protocol chip 200 to the external device 2000. The main protocol chip 200 is communicatively connected to at least one slave protocol chip 300. When the charging protocol of the external device 2000 matches the charging protocol of any one of the slave protocol chips 300, the main protocol chip 200 controls the power supply circuit 100 to output a charging voltage corresponding to the slave protocol chip 300 to the external device 2000.

[0040] Referring to Figure 2 , an embodiment of the present application further provides a charging device 1100. The charging device 1100 includes the charging circuit 1000 of the embodiment of the present application and a charging port 1200. The charging circuit 1000 can be connected to the external device 2000 through the charging port 1200.

[0041] The charging device 1100 can be an in-vehicle charging device, such as a charging pile, a starting power supply of a vehicle, etc. The charging device 1100 can charge the vehicle according to different charging protocols.

[0042] Specifically, the power supply circuit 100 may include an energy storage group and a voltage output terminal. The energy storage group may include an energy storage capacitor or a storage battery. The voltage output terminal can be used to connect to the external device 2000. When the voltage output terminal is connected to the external device 2000, the energy storage group can provide a charging voltage to the external device 2000 through the voltage output terminal.

[0043] Both the main protocol chip 200 and the slave protocol chip 300 can be charging protocol chips. Both the main protocol chip 200 and the slave protocol chip 300 can support common charging protocols such as the PD charging protocol and the USB charging protocol, and can also support private charging protocols of Huawei, Xiaomi, OPPO, etc.

[0044] When the charging port is connected to the external device 2000, the main protocol chip 200 can obtain the charging protocol of the external device 2000.

[0045] Take Figure 3 as an example. The charging port may include a signal terminal CC1 and a signal terminal CC2. Take Figure 4-1For example, the main protocol chip 200 can be set as a Huawei charging protocol chip with the model number SPSQ8841. The main protocol chip 200 can be communicatively connected to the signal terminal CC1 and the signal terminal CC2. When the charging port is connected to an external device 2000, the main protocol chip 200 can obtain the charging protocol of the external device 2000 based on the signal terminal CC1 and the signal terminal CC2.

[0046] When the charging port is connected to an external device 2000, the slave protocol chip 300 can also obtain the charging protocol of the external device 2000.

[0047] Take Figure 5-1 For example, the slave protocol chip 300 can be set as a Xiaomi private protocol chip with the model number SC2021QQDER. The slave protocol chip 300 can be communicatively connected to the signal terminal CC1 and the signal terminal CC2. When the charging port is connected to an external device 2000, the slave protocol chip 300 can obtain the charging protocol of the external device 2000 based on the signal terminal CC1 and the signal terminal CC2.

[0048] When the charging protocol supported by the main protocol chip 200 can match the charging protocol of the external device 2000, the main protocol chip 200 can adjust the charging voltage for the external device 2000 based on the charging protocol supported by the main protocol chip 200, achieving precise control of the charging process to meet the fast charging requirements of the device.

[0049] Take Figure 3 For example, the charging port can include a signal terminal USBD1+ and a signal terminal USBD1-. Take Figure 4-1 For example, the main protocol chip 200 can include a signal terminal DP1 and a signal terminal DM1. When the charging protocol supported by the main protocol chip 200 can match the charging protocol of the external device 2000, the signal terminal DP1 and the signal terminal DM1 can respond, and the main protocol chip 200 can provide a charging voltage to the external device 2000 through the signal terminal USBD1+ and the signal terminal USBD1-.

[0050] When the charging protocol supported by the slave protocol chip 300 can match the charging protocol of the external device 2000, the slave protocol chip 300 can report to the main protocol chip 200, enabling the main protocol chip 200 to adjust the charging voltage for the external device 2000 based on the charging protocol supported by the slave protocol chip 300, achieving precise control of the charging process to meet the fast charging requirements of the device.

[0051] Take Figure 3 For example, the charging port can include a signal terminal USBD2+ and a signal terminal USBD2-. Take Figure 5-1For example, the slave protocol chip 300 may include a signal terminal DP2 and a signal terminal DM2. When the charging protocol supported by the slave protocol chip 300 can match the charging protocol of the external device 2000, the signal terminal DP2 and the signal terminal DM2 can respond, and the slave protocol chip 300 can provide a charging voltage to the external device 2000 through the signal terminal USBD2+ and the signal terminal USBD2-.

[0052] The number of the slave protocol chips 300 can be set to one, and the master protocol chip 200 can be communicatively connected to one slave protocol chip 300.

[0053] The protocol chips can also be set to multiple, and the master protocol chip 200 can be communicatively connected to multiple slave protocol chips 300. When the charging protocol supported by any one of the slave protocol chips 300 can match the charging protocol of the external device 2000, the master protocol chip 200 can adjust the charging voltage for the external device 2000 based on the charging protocol supported by the slave protocol chip 300.

[0054] It can be understood that the charging circuit 1000 can match the charging protocol of the master protocol chip 200, or can also match the charging protocol of any one or more of the slave protocol chips 300. The charging circuit 1000 can meet the high-power charging requirements with diverse charging protocols, ensuring both the best charging rate and charging safety.

[0055] In some embodiments, the charging protocol of the slave protocol chip 300 matches multiple charging protocols.

[0056] Specifically, the charging protocol of the slave protocol chip 300 can match multiple charging protocols, enabling the charging circuit 1000 to meet the high-power charging requirements with diverse charging protocols.

[0057] For example, the slave protocol chip 300 can match the Xiaomi charging protocol and the OPPO charging protocol. When the charging protocol not supported by the master protocol chip 200 can match the charging protocol of the external device 2000, it can first be determined whether the external device 2000 supports the Xiaomi charging protocol. If it does, the slave protocol chip 300 can inform the master protocol chip 200, causing the master protocol chip 200 to control the power supply circuit 100 to provide the corresponding charging voltage. If not, it can then be determined whether the external device 2000 supports the OPPO charging protocol. If it does, the slave protocol chip 300 can inform the master protocol chip 200, causing the master protocol chip 200 to control the power supply circuit 100 to provide the corresponding charging voltage.

[0058] Refer to Figure 6, in some embodiments, the power supply circuit 100 includes a voltage conversion circuit 110. The voltage conversion circuit 110 is connected to an external device 2000, and the main protocol chip 200 is connected to the voltage conversion circuit 110. The main protocol chip 200 is configured to control the voltage conversion circuit 110 to convert the accessed voltage into the charging voltage of the external device 2000 according to the charging protocol matched with the external device 2000.

[0059] Specifically, when the charging protocol supported by the main protocol chip 200 can match the charging protocol of the external device 2000, the main protocol chip 200 can control the output voltage of the voltage conversion circuit 110 based on the charging protocol supported by the main protocol chip 200. When the charging protocol supported by the slave protocol chip 300 can match the charging protocol of the external device 2000, the slave protocol chip 300 can report to the main protocol chip 200, so that the main protocol chip 200 can control the output voltage of the voltage conversion circuit 110 based on the charging protocol supported by the slave protocol chip 300.

[0060] The main protocol chip 200 can provide the charging voltage through the control signal terminal Vout. Figure 4-1 For example, the main protocol chip 200 may include a signal terminal SCL and a signal terminal SDA. Figure 5-2 For example, the slave protocol chip 300 may include a signal terminal SDA_S / P4 and a signal terminal SCL_S / P3. The signal terminal SCL can be communicatively connected to the signal terminal SCL_S / P3, and the signal terminal SDA can be communicatively connected to the signal terminal SDA_S / P4, so that the main protocol chip 200 and the slave protocol chip 300 can be connected based on the I2C communication protocol.

[0061] For example, Figure 4-2 For example, the signal terminal OPTO can be connected to the base of the triode Q1 through a resistor element, and the signal terminal OPTO can also be connected to the emitter of the triode Q1 through a resistor element. The collector of the triode Q1 can be connected to the signal terminal FB. The main protocol chip 200 can control the output current of the signal terminal OPTO to control the current flowing through the emitter and the base of the triode Q1, and further control the output current of the collector of the triode, that is, control the current flowing through the signal terminal FB.

[0062] For example, Figure 7-1 For example, the signal terminal FB can be grounded through a resistor element, and the signal terminal OPTO can control the voltage accessed by the signal terminal FB by controlling the current flowing through the signal terminal FB.

[0063] The voltage conversion circuit 110 may include a power chip with the model SC8701QQDER. The power chip can obtain the voltage accessed by the signal terminal FB and provide a charging voltage to the signal terminal VOUT according to the voltage accessed by the signal terminal FB to charge the external device 2000.

[0064] In this way, the main protocol chip 200 can control the output voltage of the voltage conversion current based on the charging protocol matched by the external device 2000, so as to control the charging voltage of the external device 2000.

[0065] In some embodiments, the voltage conversion circuit 110 is configured to convert the accessed voltage into the power supply voltage of the main protocol chip 200 or the power supply voltage of at least one slave protocol chip 300.

[0066] Specifically, the voltage conversion circuit 110 can also convert the accessed voltage into the power supply voltage of the main protocol chip 200 or the slave protocol chip 300, without the need to additionally set the power supply for the main protocol chip 200 or the slave protocol chip 300.

[0067] Take Figure 7-2 as an example. The power supply chip can access the input voltage through the VIN1 signal terminal. When the input voltage VIN is accessed at the VIN1 signal terminal, the enable signal of the power supply chip can be pulled high, so that the power supply chip can provide a 5V power supply voltage to the main protocol chip 200 and the slave protocol chip 300 through the signal terminal VOUT.

[0068] In some embodiments, the power supply circuit 100 includes a switch circuit 120, and the switch circuit 120 is connected between the voltage conversion circuit 110 and the charging port. When the charging port is connected to the external device 2000, the main protocol chip 200 controls the switch circuit 120 to conduct.

[0069] Specifically, when the charging port is not connected to the external device 2000, the switch circuit 120 can be in an off state. When the charging port is connected to the external device 2000, the main protocol chip 200 can control the switch circuit 120 to conduct, so that the voltage conversion circuit 110 provides a charging voltage through the charging port.

[0070] Take Figure 3 as an example. The charging port can include a signal terminal VBUS1 and a signal terminal VBUS3, and the signal terminal VBUS1 and the signal terminal VBUS3 can access the voltage provided by the signal terminal USB_QC. Take Figure 7-1 as an example. The voltage conversion circuit 110 can provide the charging voltage to the signal terminal USB_QC_OUT through the signal terminal VOUT.

[0071] The switch circuit 120 can be connected between the signal terminal USB_QC and the signal terminal USB_QC_OUT. Take Figure 4-3 as an example. The main protocol chip 200 can be connected to the control electrode of the switch circuit 120 through the signal terminal GATE, and control the conduction and disconnection of the switch circuit 120 through the signal terminal GATE.

[0072] The switching circuit 120 may include electronic switching devices such as triodes and MOS transistors. For example, the gate of the MOS transistor may be connected to the signal terminal GATE, the source of the MOS transistor may be connected to the signal terminal USB_QC, and the drain of the MOS transistor may be connected to the signal terminal USB_QC_OUT.

[0073] In this way, when the charging port is connected to the external device 2000, the main protocol chip 200 can control the switching circuit 120 to conduct, so that the voltage conversion circuit 110 provides a charging voltage through the charging port.

[0074] In some embodiments, the power supply circuit 100 includes a detection circuit 130 configured to detect the charging current of the external device 2000. When the charging current does not match the charging protocol of the external device 2000, the main protocol chip 200 controls the switching circuit 120 to disconnect.

[0075] Specifically, the main protocol chip 200 can obtain the current value detected by the detection circuit 130 and control the switching circuit 120 to disconnect when the charging current does not match the charging protocol of the external device 2000, which can avoid damage to the circuit caused by abnormal charging of the charging circuit 1000.

[0076] For example, the main protocol chip 200 can match the Huawei charging protocol, and the slave protocol chip 300 can match the Xiaomi charging protocol.

[0077] When the external device 2000 supports the Huawei charging protocol, the main protocol chip 200 can control the power supply circuit 100 to provide a charging current to the external device 2000 based on the Huawei charging protocol. If the actual charging current of the external device 2000 is outside the range specified by the Huawei charging protocol, the main protocol chip 200 can control the switching circuit 120 to disconnect.

[0078] When the external device 2000 supports the Xiaomi charging protocol, the main protocol chip 200 can control the power supply circuit 100 to provide a charging current to the external device 2000 based on the Xiaomi charging protocol. If the actual charging current of the external device 2000 is outside the range specified by the Xiaomi charging protocol, the main protocol chip 200 can control the switching circuit 120 to disconnect.

[0079] In some embodiments, the detection circuit 130 includes a sampling resistor 131, and the output terminal of the power supply circuit 100 is grounded through the sampling resistor 131.

[0080] Specifically, the signal terminal USB_QC_OUT can be grounded through the sampling resistor 131. The main protocol chip 200 can be connected to both ends of the sampling resistor 131 through the signal terminal CSP+ and the signal terminal CSN- to detect the voltage across the sampling resistor 131, and further determine the current flowing through the sampling resistor 131, that is, the charging current of the external device 2000.

[0081] In this way, the main protocol chip 200 can determine the charging current of the external device 2000 according to the voltage across the sampling resistor 131.

[0082] In some embodiments, when the charging voltage does not match the charging protocol of the external device 2000, at least one slave protocol chip 300 controls the switch circuit 120 to disconnect.

[0083] Specifically, the slave protocol chip 300 can obtain the current value detected by the detection circuit 130 and control the switch circuit 120 to disconnect when the charging current does not match the charging protocol of the external device 2000, which can avoid damage to the circuit caused by abnormal charging of the charging circuit 1000.

[0084] The slave protocol chip 300 can match the Xiaomi charging protocol and the OPPO charging protocol.

[0085] When the external device 2000 supports the Xiaomi charging protocol, the slave protocol chip 300 can control the power supply circuit 100 to provide a charging current to the external device 2000 based on the Xiaomi charging protocol. If the actual charging current of the external device 2000 is outside the range specified by the Xiaomi charging protocol, the slave protocol chip 300 can control the switch circuit 120 to disconnect.

[0086] When the external device 2000 supports the OPPO charging protocol, the slave protocol chip 300 can control the power supply circuit 100 to provide a charging current to the external device 2000 based on the OPPO charging protocol. If the actual charging current of the external device 2000 is outside the range specified by the OPPO charging protocol, the slave protocol chip 300 can control the switch circuit 120 to disconnect.

[0087] Refer to Figure 8 In some embodiments, the power supply circuit 100 includes a battery 150 and a protection circuit 141. The battery 150 is connected to the voltage conversion circuit 110 through the protection circuit 141, and the protection circuit 141 is configured to disconnect when the battery 150 is reversely connected.

[0088] Specifically, the voltage provided by the battery 150 can be connected to the signal terminal VBAT_VCC, and the signal terminal VBAT_VCC can be connected to the input terminal VIN of the voltage conversion circuit 110 through the protection circuit 141.

[0089] The protection circuit 141 may include an anti-reverse connection diode Da and an anti-reverse connection MOS transistor Qa. The anode of the anti-reverse connection diode Da may be connected to the signal terminal VBAT_VCC, the cathode of the anti-reverse connection diode Da is connected to the base of the anti-reverse connection MOS transistor Qa, and the cathode of the anti-reverse connection diode Da may also be grounded through a resistive element.

[0090] In the case of reverse connection of the battery 150, the voltage accessed by the signal terminal VBAT_VCC is less than the voltage of the ground electrode, causing the anti-reverse connection diode Da to conduct forwardly. The gate voltage and the source voltage of the anti-reverse connection MOS transistor Qa are the same, and the anti-reverse connection MOS transistor is turned off, and the signal terminal VBAT_VCC cannot be connected to the signal terminal VIN.

[0091] In this way, the protection circuit 141 can ensure that the connection between the battery 150 and the voltage conversion circuit 110 is disconnected in the case of reverse connection of the battery 150, playing a role in protecting the battery 150.

[0092] Refer to Figure 8 , in some embodiments, the power supply circuit 100 includes a battery 150 and a filtering circuit 142. The battery 150 is connected to the voltage conversion circuit 110 through the filtering circuit 142, and the filtering circuit 142 is configured to filter the voltage of the battery 150 and then provide it to the voltage conversion circuit 110.

[0093] Specifically, the filtering circuit 142 may include a filtering capacitor Ca and a filtering inductor La. The signal terminal VBAT_VCC may be grounded through the filtering capacitor, the signal terminal VBAT_VCC may be connected to the signal terminal VIN through the filtering inductor La, and the filtering capacitor Ca and the filtering inductor La may filter the voltage provided by the signal terminal VBAT_VCC and then provide it to the signal terminal VIN.

[0094] Refer to Figure 9 , the present application further provides a vehicle 1300. The vehicle 1300 may include the charging circuit 1000 and the charging device 1100 of the above embodiments, and the technical effects of the vehicle 1300 include all the technical effects of the charging circuit 1000 and the charging device 1100.

[0095] Specifically, the vehicle 1300 may also include an external charging port and the charging circuit 1000. In the case where an external device 2000 is connected to the charging port of the vehicle 1300, the power supply of the vehicle 1300 may also charge the external device 2000 through the charging circuit 1000.

[0096] In the description of this specification, the descriptions referring to the terms "certain embodiments", "in one example", "exemplarily", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0097] Any process or method description shown in the flowchart or described in other ways herein can be understood to represent a module, segment or part of code including one or more executable instructions for implementing a specific logical function or process, and the scope of the preferred embodiments of the present application includes additional implementations, where the functions can be executed in a substantially simultaneous manner or in a reverse order according to the functions involved, rather than in the order shown or discussed, which should be understood by those skilled in the art to which the embodiments of the present application pertain.

[0098] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are optional and should not be construed as limitations on the present application. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present application.

Claims

1. A charging circuit, characterized in that, Comprising: A power supply circuit configured to connect to an external device; A main protocol chip connected to the power supply circuit. When the charging protocol of the external device matches the charging protocol of the main protocol chip, the main protocol chip controls the power supply circuit to output a charging voltage corresponding to the main protocol chip to the external device; At least one slave protocol chip. The main protocol chip is communicatively connected to at least one of the slave protocol chips. When the charging protocol of the external device matches the charging protocol of any one of the slave protocol chips, the main protocol chip controls the power supply circuit to output a charging voltage corresponding to the slave protocol chip to the external device.

2. The charging circuit according to claim 1, wherein The power supply circuit includes a voltage conversion circuit connected to the external device, and the main protocol chip is connected to the voltage conversion circuit. The main protocol chip is configured to control the voltage conversion circuit to convert the input voltage into the charging voltage of the external device according to the charging protocol matched by the external device.

3. The charging circuit according to claim 2, wherein The voltage conversion circuit is configured to convert the input voltage into the power supply voltage of the main protocol chip or the power supply voltage of at least one of the slave protocol chips.

4. The charging circuit according to claim 2, wherein The power supply circuit includes a switch circuit connected between the voltage conversion circuit and the charging port. When the charging port is connected to the external device, the main protocol chip controls the switch circuit to conduct.

5. The charging circuit according to claim 4, wherein The power supply circuit includes a detection circuit configured to detect the charging current of the external device. When the charging current does not match the charging protocol of the external device, the main protocol chip controls the switch circuit to disconnect.

6. The charging circuit according to claim 5, wherein The detection circuit includes a sampling resistor, and the output terminal of the power supply circuit is grounded through the sampling resistor.

7. The charging circuit according to claim 5, wherein When the charging voltage does not match the charging protocol of the external device, at least one of the slave protocol chips controls the switch circuit to disconnect.

8. The charging circuit according to claim 2, wherein The power supply circuit includes a battery and a protection circuit. The battery is connected to the voltage conversion circuit through the protection circuit, and the protection circuit is configured to disconnect in the case of reverse connection of the battery.

9. The charging circuit according to claim 2, wherein The power supply circuit includes a battery and a filtering circuit. The battery is connected to the voltage conversion circuit through the filtering circuit, and the filtering circuit is configured to filter the voltage of the battery and provide it to the voltage conversion circuit.

10. The charging circuit according to claim 1, wherein The main protocol chip is configured as a chip matching the Huawei charging protocol, and the slave protocol chip is configured as a chip matching the Xiaomi charging protocol and the OPPO charging protocol.

11. The charging circuit according to claim 10, wherein The main protocol chip includes a Huawei charging protocol chip with the model number SPSQ8841, and the slave protocol chip includes a Xiaomi private protocol chip with the model number SC2021QQDER.

12. A charging device, characterized in that, The charging device includes the charging circuit according to any one of claims 1-10.

13. A vehicle, characterized in that, The vehicle includes the charging circuit according to any one of claims 1-11 or the charging device according to claim 12.

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