WO2023185229A1 - 充电保护电路、充电保护方法、终端设备及存储介质 - Google Patents

充电保护电路、充电保护方法、终端设备及存储介质 Download PDF

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Publication number
WO2023185229A1
WO2023185229A1 PCT/CN2023/073433 CN2023073433W WO2023185229A1 WO 2023185229 A1 WO2023185229 A1 WO 2023185229A1 CN 2023073433 W CN2023073433 W CN 2023073433W WO 2023185229 A1 WO2023185229 A1 WO 2023185229A1
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WIPO (PCT)
Prior art keywords
charging
interface
circuit
comparator
voltage
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PCT/CN2023/073433
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English (en)
French (fr)
Inventor
安斌
Original Assignee
中兴通讯股份有限公司
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Publication of WO2023185229A1 publication Critical patent/WO2023185229A1/zh

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00309—Overheat or overtemperature protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present disclosure relates to the technical field of charging protection, and in particular, to a charging protection circuit, a charging protection method, a terminal device and a storage medium.
  • USB Universal Serial Bus
  • the size of USB connectors must also be miniaturized. If water, iron filings or carbon powder enter the terminal device, the paths corresponding to the power pin, GND pin and CC pin of the USB connector will be short-circuited, which may cause the terminal device to malfunction. Burning may occur during charging, and may even cause accidents such as fire. Although disconnecting the bus (BUS) path or ground path when the charging port is abnormal can generally protect the terminal equipment, it cannot effectively protect the charging chip of the terminal equipment. There is a technical problem in this field that terminal equipment is less safe when charging.
  • the present disclosure provides a charging protection circuit, terminal equipment, charging protection method, and storage medium, aiming to solve the technical problem in the field of low safety when charging terminal equipment.
  • the present disclosure provides a charging protection circuit, which includes at least two switch circuits, a detection circuit and a control circuit; the two switch circuits are respectively connected to the charging path and the configuration path between the charging interface of the terminal device and the charging chip.
  • the detection circuit is used to detect the interface parameters of the charging interface
  • the control circuit is connected to the detection circuit and is used to generate a control signal according to the interface parameters; wherein, the control circuit is used to control the switch circuit to be turned on or off at the same time according to the control signal.
  • the present disclosure also provides a terminal device.
  • the terminal device includes a charging interface, a charging chip, and a charging protection circuit as provided in any one of the specifications of the present disclosure.
  • the present disclosure also provides a charging protection method.
  • the terminal device includes a charging protection circuit as provided in any of the disclosure specifications.
  • the charging protection method includes: obtaining the interface parameters of the charging interface; determining the charging interface based on the interface parameters. Working status; if the working status of the charging interface is abnormal, the control switch circuit is turned off at the same time; if the working status of the charging interface is normal, the control switch circuit is turned on at the same time.
  • the present disclosure also provides a storage medium for computer-readable storage.
  • the storage medium stores one or more programs.
  • the one or more programs can be executed by one or more processors to implement the present disclosure.
  • the instructions provide steps for any charging protection method.
  • Figure 1 is a schematic structural diagram of a terminal device provided by the present disclosure
  • Figure 2 is a schematic structural diagram 2 of a terminal device provided by the present disclosure
  • Figure 3 is a schematic structural block diagram of a detection circuit provided by the present disclosure.
  • Figure 4 is a schematic structural diagram 3 of a terminal device provided by the present disclosure.
  • FIG. 5 is a circuit schematic diagram of a charging protection circuit provided by the present disclosure.
  • Figure 6 is a circuit schematic diagram of a reference voltage generating circuit provided by the present disclosure.
  • Figure 7 is a schematic flow chart of a charging protection method provided by the present disclosure.
  • Figure 8 is a schematic structural block diagram of a terminal device provided by the present disclosure.
  • USB Universal Serial Bus
  • USB has become the interface used by a variety of peripherals because of its support for large-volume data transmission and hot-swap support. Standard interface.
  • various communication devices such as personal handheld phones, business phones, tablet computers and other terminal devices, are increasingly used by users.
  • USB Type-C connector includes configuration channel (CC) pins and bus channel (Vbus) pins. with other pins. If water, iron filings or carbon powder enter the terminal device, the paths corresponding to the power pin, GND pin and CC pin of the USB connector will be short-circuited, which may cause the terminal device to malfunction. Burning may occur during charging, and may even cause accidents such as fire. Although disconnecting the bus (BUS) path or ground path when the charging port is abnormal can generally protect the terminal equipment, it cannot effectively protect the charging chip of the terminal equipment.
  • BUS bus
  • Existing USB connectors generally include Micro-USB connectors and USB Type-C connectors.
  • Existing charging protection methods generally target Micro-USB connectors.
  • the Micro USB interface of the terminal device is connected to the Micro USB interface of the charger.
  • the Vbus pin, GND pin, Data+ pin and Data- pin of the Micro USB interface of the terminal device are respectively connected with the Vbus pin, GND pin, Data+ pin of the Micro USB interface of the charger. pin and Data-pin connections. Since the Vbus pin and GND pin of the Micro-USB connector are used for power transmission, and the Data+ pin and Data- pin are used for data transmission, for the Micro-USB connector, you can only disconnect the bus when the charging port is abnormal. (BUS) path or ground wire (GND) path can play a role in protecting mobile phone terminal products. There is no need to disconnect the Data+ pin and Data- pin and the terminal device will not be damaged.
  • the USB Type-C connector Compared with the Micro-USB connector, the USB Type-C connector has a new configuration channel, which can detect forward and reverse insertion, detect USB connections, identify how much voltage and current it can provide, and establish and manage data and VBUS between USB devices. connection functions. Therefore, the USB Type-C connector can achieve high-power charging through the newly added configuration channel. If the bus path or the ground path is only disconnected when the charging port is abnormal, the configuration path may reflow with other paths, resulting in the configuration path. A short circuit may cause damage to the charging chip of the terminal device.
  • the present disclosure provides a charging protection circuit, terminal equipment, charging protection method and storage medium.
  • the charging guarantee The protection circuit can be applied to terminal equipment. By disconnecting the charging path and the configuration path at the same time, it improves the safety of the terminal device when charging. It can also prevent backflow in the configuration path and can effectively protect the charging chip of the terminal device when the terminal device is charging. .
  • FIG. 1 is a schematic structural diagram of a charging protection circuit provided by the present disclosure.
  • the charging protection circuit 100 includes: at least two switch circuits 10 , a detection circuit 20 and a control circuit 30 .
  • the terminal device can be a smartphone, a tablet, a laptop, a desktop computer, a smart speaker, a smart watch, etc., but is not limited to this.
  • the charging interface 200 of the terminal device and the charging chip 300 can be connected through a charging path and a configuration path, so that the terminal device can be charged when the charging interface 200 is connected to an external charger.
  • the charging interface 200 may be an interface of a USB Type-C connector for connecting to an external charger.
  • the charging chip 300 of the terminal device can interact with the charging chip 300 of the charger when the charging interface 200 is connected to an external charger. If the charging path and configuration path between the charging interface 200 of the terminal device and the charging chip 300 are disconnected at the same time, When turned on, charging of the terminal device will be stopped.
  • the detection circuit 20 is used to detect the interface parameters of the charging interface 200, which can be obtained by detecting the status of the charging interface 200; the control circuit 30 is connected to the detection circuit 20 and the switch circuit 10, and is used to generate a control signal according to the received interface parameters. , in an exemplary embodiment, the control circuit 30 is used to determine whether the state of the charging interface 200 is an abnormal state according to the received interface parameters, and the control signal is used to feedback whether the state of the charging interface 200 is an abnormal state. It should be noted that Yes, the control signal can be a level signal, etc., and can be a signal that feeds back the status of the charging interface 200 .
  • the control circuit 30 is also used to control the switch circuits 10 to be turned on or off at the same time according to the control signal generated by the interface parameters. Specifically, the control circuit 30 is also used to control the switch circuit 10 on the charging path and the switch circuit 10 on the configuration path to be turned on at the same time based on the control signal generated by the interface parameters, or the control circuit 30 is also used to control the control signal generated based on the interface parameters. The signal controls the switch circuit 10 on the charging path and the switch circuit 10 on the configuration path to be turned off at the same time.
  • the control circuit 30 when the state of the control signal feedback charging interface 200 is an abnormal state, the control circuit 30 controls the switch circuit 10 on the charging path and the switch circuit 10 on the configuration path to be turned off at the same time, thereby stopping the charging of the terminal device. Charging is performed; when the state of the control signal feedback charging interface 200 is a normal state, the control circuit 30 controls the switch circuit 10 on the charging path and the switch circuit 10 on the configuration path to be turned on at the same time, thereby continuing to charge the terminal device.
  • the safety of the terminal device during high-power charging can be improved, and it can also prevent Backflow occurs in the configuration path, thereby effectively protecting the charging chip 300 of the terminal device when the terminal device is charging, improving The user’s experience of using the terminal device.
  • the charging path includes a bus path BUS and a ground path GND, and both the bus path and the ground path are provided with switch circuits 10 .
  • the control circuit 30 is used to control the switch circuits 10 to be turned on or off at the same time according to the control signal.
  • the control circuit 30 is used to control the switch circuit 10 on the bus path, the switch circuit 10 on the ground path, and the switch circuit 10 on the configuration path to be turned on or off at the same time according to the control signal generated by the interface parameter. disconnect.
  • control circuit 30 controls the corresponding switch circuits 10 on the bus path, the ground line and the configuration path to be turned on or off at the same time according to the control signal generated by the interface parameters, so that when the terminal device is charging with high power, the terminal equipment can be charged more comprehensively. Terminal equipment is charged for protection.
  • the control circuit 30 when the status of the control signal feedback charging interface 200 is an abnormal state, the control circuit 30 controls the corresponding switch circuits 10 on the bus path, the ground path, and the configuration path to open simultaneously, thereby stopping the charging of the terminal. The device is charged; when the control signal feedback charging interface 200 is in a normal state, the control circuit 30 controls the corresponding switch circuits 10 on the bus path, ground path and configuration path to be turned on at the same time, thereby continuing to charge the terminal device.
  • the interface parameters include at least one of interface temperature parameters, interface charging voltage, and interface charging current.
  • the interface temperature parameter can be obtained by detecting the temperature of the charging interface 200 or near the charging interface 200; the interface charging voltage can be obtained by detecting the voltage of the bus path; and the interface charging current can be obtained by detecting the current of the bus path or the ground path.
  • interface parameters may include but are not limited to interface temperature parameters, interface charging voltage and interface charging current, which are not specifically limited here. It can be understood that all parameters that can be used to detect the status of the charging interface 200 can be used as interface parameters.
  • the detection circuit 20 may include at least one of a temperature detection circuit 21 , a voltage detection circuit 22 and a current detection circuit 23 . It can be understood that when which interface parameter needs to be detected, the detection circuit 20 will include a corresponding circuit. In an exemplary embodiment, if it is necessary to adjust the interface temperature parameters and interface charging When the voltage is detected, the detection circuit 20 may include a temperature detection circuit 21 and a voltage detection circuit 22 . Therefore, the temperature, voltage, and current states of the charging interface 200 can be detected through the temperature detection circuit 21, the voltage detection circuit 22, and the current detection circuit 23 respectively, and whether there is an abnormality in the charging interface 200 can be more comprehensively detected.
  • the temperature detection circuit 21 is connected to the control circuit 30.
  • the temperature detection circuit 21 is used to obtain the interface temperature parameters and generate a temperature feedback voltage according to the interface temperature parameters;
  • the voltage detection circuit 22 is connected to the charging interface 200 and the control circuit 30.
  • the voltage detection circuit 22 is connected to the charging interface 200 and the control circuit 30. 22 is used to obtain the interface charging voltage.
  • the voltage detection circuit 22 can be connected to the bus path to detect the interface charging voltage;
  • the current detection circuit 23 is connected to the charging interface 200 and the control circuit 30, and the current detection circuit 23 is connected to the charging interface 200 and the control circuit 30. 23 is used to obtain the interface charging current.
  • the current detection circuit 23 can be connected to a bus path or a ground path to detect the interface charging current.
  • the control circuit 30 can determine whether the temperature status of the charging interface 200 is abnormal based on the temperature feedback voltage.
  • the control circuit 30 can determine whether the voltage status of the charging interface 200 is abnormal based on the interface charging voltage.
  • the control circuit 30 can determine whether the temperature status of the charging interface 200 is abnormal based on the interface charging voltage.
  • the charging current determines whether the current status of the charging interface 200 is abnormal; if the temperature status and/or voltage status and/or current status of the charging interface 200 are abnormal, the control circuit 30 controls the corresponding switch circuits 10 on the charging path and the configuration path simultaneously. Disconnected; if the temperature state, voltage state and current state of the charging interface 200 are all normal, the control circuit 30 controls the corresponding switch circuits 10 on the charging path and the configuration path to be turned on at the same time.
  • the control circuit 30 includes a comparator circuit 31 and a logic gate 32.
  • the comparator circuit 31 includes at least one comparator, one of the input terminals of the comparator is connected to the detection circuit 20; the logic gate The input terminal of the logic gate 32 is connected to the output terminal of the comparator, and the output terminal of the logic gate 32 is connected to the switch circuit 10 for outputting a control signal. Therefore, the comparator circuit 31 and the logic gate 32 can be used together to accurately determine whether there is an abnormality in the charging interface 200. At the same time, the cost of using the comparator circuit 31 and the logic gate 32 together is lower and the circuit implementation is simpler.
  • each input end of the logic gate 32 is connected to the output end of each comparator, and the output end of the logic gate 32 is connected to each switch circuit 10. It is used to control the corresponding switch circuits 10 on the charging path and the configuration path to be turned on or off at the same time according to the control signal.
  • the detection circuit 20 includes a temperature detection circuit 21 and a voltage detection circuit 22, the number of comparators is two, and one input terminal of the first comparator 310 is connected to the temperature detection circuit 21, and the first comparator 310 is connected to the temperature detection circuit 21.
  • One of the input terminals of the two comparators 311 is connected to the voltage detection circuit 22, and the output terminals of the first comparator 310 and the second comparator 311 are respectively connected to the input terminals of the logic gate 32, whereby the comparator circuit 31 and The logic gate 32 performs logical judgment to accurately determine whether there is an abnormality in the charging interface 200.
  • the cost of using the comparator circuit 31 and the logic gate 32 together is lower and the circuit implementation is simpler.
  • the detection circuit 20 includes a temperature detection circuit 21 and/or a voltage detection circuit 22 and/or a current detection circuit.
  • the measuring circuit 23; the comparator circuit 31 includes a first comparator 310 and/or a second comparator 311 and/or a third comparator.
  • the first input terminal of the first comparator 310 is connected to the temperature detection circuit 21, and the second input terminal of the first comparator 310 is connected to the first preset voltage;
  • the first input terminal of the second comparator 311 is connected to the voltage detection circuit. 22 is connected, the second input terminal of the second comparator 311 is connected to the second preset voltage;
  • the first input terminal of the third comparator is connected to the current detection circuit 23, and the second input terminal of the third comparator is connected to the preset current.
  • the first preset voltage is the reference voltage corresponding to the temperature feedback voltage
  • the second preset voltage is the reference voltage corresponding to the interface charging voltage
  • the preset current is the reference current corresponding to the interface charging current
  • the preset voltage and preset current can be used as the basis for judging the temperature feedback voltage, interface charging voltage and interface charging current respectively, and can be set according to user needs or operators.
  • the first comparator 310, the second comparator 311 and the third comparator can be forward comparators or reverse comparators, and can be set according to actual requirements.
  • the first input terminal of the first comparator 310 is connected to the temperature detection circuit 21 , and the second input terminal of the first comparator 310 is connected to the first preset voltage, which can be compared by the first comparator 310
  • the temperature feedback voltage and the first preset voltage are outputted through the output terminal of the first comparator 310 to determine whether there is an abnormality in the temperature state of the charging interface 200
  • the first input terminal of the second comparator 311 Connected to the voltage detection circuit 22, the second input end of the second comparator 311 is connected to the second preset voltage, and the interface charging voltage and the second preset voltage can be compared through the second comparator 311, and then the second comparator 311
  • the output end of the third comparator outputs a corresponding level signal to determine whether there is an abnormality in the voltage state of the charging interface 200
  • the first input end of the third comparator is connected to the current detection circuit 23, and the second input end of the third comparator is connected to the preset
  • the current can be compared with the interface charging current and the
  • the logic gate 32 outputs a control signal according to the level signals output by the first comparator 310, the second comparator 311 and the third comparator respectively. If any one of the temperature state, voltage state and current state of the charging interface 200 is abnormal, , controlling each switch circuit 10 to be turned off.
  • the logic gate 32 may include any one of an AND gate, an OR gate, a NAND gate, and a NOR gate.
  • the logic gate 32 can be comprehensively determined based on the actual judgment logic of the comparator. It can be understood that the control signal output by the logic gate 32 can correctly feedback whether the charging interface 200 is abnormal.
  • the logic gate 32 is an AND gate.
  • the first input terminal of the first comparator 310 is connected to the temperature detection circuit 21 to obtain the temperature feedback voltage.
  • the second input terminal of the first comparator 310 is connected to the first preset voltage. At this time, the first comparator 310 is a forward comparison.
  • the output terminal of the first comparator 310 outputs a high level at this time; when the temperature feedback voltage is less than the first preset voltage (i.e., VRTC ⁇ V1), at this time the first comparator The output terminal of 310 outputs low level.
  • Table 1 is the truth table corresponding to the first comparator.
  • the first input terminal of the second comparator 311 is connected to the voltage detection circuit 22 to obtain the interface charging voltage.
  • the second input terminal of the second comparator 311 is connected to the second preset voltage.
  • the second comparator 311 is in reverse comparison. device, so when the interface charging voltage is less than the second preset voltage (i.e. VBUS ⁇ V2), the output terminal of the second comparator 311 outputs a high level at this time; when the interface charging voltage is greater than the second preset voltage (i.e. VBUS> V2), at this time, the output terminal of the second comparator 311 outputs a low level.
  • Table 2 is the truth table corresponding to the second comparator.
  • the output terminal of the first comparator 310 is connected to the first input terminal of the AND gate
  • the output terminal of the second comparator 311 is connected to the second input terminal of the AND gate
  • logic calculation is performed through the AND gate
  • the control signal S is output.
  • Table 3 is the truth table corresponding to the AND gate.
  • the first comparator 310 Outputs a high level; the interface charging voltage is lower than the second preset voltage, that is, VBUS ⁇ V2, and the second comparator 311 outputs a high level; in this way, after passing through the AND gate, the control signal S is also at a high level, thereby switching each switch circuit 10 is turned on to charge the terminal device. That is to say, only when each detection state is normal, each switch circuit 10 is in a conductive state.
  • the first comparator 310 When the temperature of the charging interface 200 is in an abnormal state, and the interface temperature is higher than the preset temperature threshold, that is, the obtained temperature feedback voltage is lower than the first preset voltage, that is, VRTC ⁇ V1, the first comparator 310 outputs a low voltage. flat.
  • the second comparator 311 When the voltage of the charging interface 200 is in an abnormal state, and the interface charging voltage is higher than the second preset voltage, that is, VBUS>V2, the second comparator 311 outputs a low level. Since the logic gate 32 is an AND gate at this time, as long as one input terminal input is low level, the control signal S will be low level after passing through the AND gate, thereby disconnecting each switch circuit 10 to stop charging the terminal device. .
  • each switch circuit 10 will be disconnected, thereby disconnecting the charging path and the configuration path between the charging interface 200 and the charging chip 300 at the same time, thus protecting the terminal equipment.
  • the comparator will compare and output the normal control signal, thereby returning each path between the charging interface 200 and the charging chip 300 to the normal path state.
  • the logic gate 32 is an OR gate, a NAND gate or a NOR gate, it is only necessary to set the types of the first comparator 310 and the second comparator 311 (forward comparator or reverse comparator) accordingly. And/or correspondingly adjust the first input terminal and the second input terminal of the first comparator 310 and the second comparator 311 respectively.
  • the temperature detection circuit 21 includes a thermistor and a voltage dividing resistor.
  • the first terminal of the thermistor is connected to the first input terminal of the first comparator 310 .
  • Two ends are connected to ground; the first end of the voltage dividing resistor is connected to the first end of the thermistor, and the second end of the voltage dividing resistor is connected to the third preset voltage. Therefore, the temperature feedback voltage can be accurately generated by setting the thermistor and the voltage divider, thereby accurately controlling each switch circuit 10 to be turned on or off at the same time.
  • the thermistor RT can be set at or close to the charging interface 200.
  • the thermistor is sensitive to temperature and can show different resistance values at different temperatures.
  • Thermistors may include positive temperature coefficient thermistors (Positive Temperature Coefficient, PTC) and negative temperature coefficient thermistors (Negative Temperature Coefficient, NTC).
  • PTC Positive Temperature Coefficient
  • NTC Negative Temperature Coefficient
  • a positive temperature coefficient thermistor has a greater resistance value at higher temperatures
  • a negative temperature coefficient thermistor has a lower resistance value at higher temperatures.
  • the voltage dividing resistor is the first resistor R1.
  • the first resistor R1 Since the voltage of the third preset voltage, that is, the reference voltage (VREF), has a certain ratio to the first preset voltage V1, the first resistor R1 can be used to divide the voltage according to actual needs. And generates temperature feedback voltage with the thermistor.
  • the third preset voltage is the reference voltage (VREF), which is used to provide voltage to the voltage dividing resistor.
  • the temperature detection circuit 21 is configured to generate a temperature feedback voltage according to the resistance of the thermistor, the resistance of the voltage dividing resistor and the third preset voltage value.
  • a negative temperature coefficient thermistor if used, if the interface temperature continues to increase, the resistance of the thermistor will decrease, and the generated temperature feedback voltage will also decrease.
  • the first comparator 310 detects that the temperature feedback voltage is lower than the first preset voltage, that is, when VRTC ⁇ V1, it determines that the temperature status of the charging interface 200 is abnormal, and controls the corresponding switch circuits on the charging path and the configuration path. 10 are disconnected at the same time.
  • the voltage detection circuit 22 is also similar to the temperature detection circuit 21, including the second resistor R2 and the third resistor R3, which also play the role of voltage dividing.
  • the switch circuit 10 is used to connect or disconnect the charging path and the configuration path, and the switch circuit 10 can be a switch, a switching tube, or the like.
  • the switching circuit 10 is a MOS transistor, and the MOS transistor is used as a switch.
  • the gate of each MOS tube is connected to the output terminal of the logic gate 32
  • the source level of each MOS tube is connected to the BUS pin, GND pin and CC pin of the charging chip 300 respectively
  • the drain level of each MOS tube is connected to the BUS pin, GND pin and CC pin of the charging chip 300 respectively.
  • the BUS pin, GND pin and CC pin of the charging interface 200 are connected.
  • the detection circuit 20 also includes a reference voltage generation circuit 24; wherein the input terminal of the reference voltage generation circuit 24 is connected to the battery voltage; the first output terminal of the reference voltage generation circuit 24 is connected to the first comparison circuit 24.
  • the second input terminal of the reference voltage generating circuit 24 is connected to the second input terminal of the second comparator 311 for outputting a second preset voltage.
  • the existing charging protection circuit 100 is generally implemented by disconnecting the path between the terminal device and the charging line. Therefore, the reference voltage generating circuit 24 cannot be powered by the battery voltage, but can only be powered by VBUS.
  • VBUS may be unstable, so the first preset voltage, the second preset voltage and the third preset voltage generated by the reference voltage generation circuit 24 will also fluctuate. , thus causing the abnormal phenomenon of repeated charging and stopping of the terminal device in the shutdown state, thereby damaging the charging chip 300 of the terminal device.
  • the battery voltage (VBAT) of the present disclosure can power the charging protection circuit 100 of the present disclosure when the system is powered off or in low power consumption mode.
  • the voltage can be obtained from the VDD power supply of the terminal device or a special backup battery. Therefore, as long as the battery is in place, no matter whether the terminal device is turned on or off when charging, the battery voltage will exist. This ensures that regardless of whether it is on or off, it can be detected and controlled by the charging protection circuit 100 of the present disclosure. This avoids the abnormal phenomenon of repeated charging and stopping in the shutdown state by relying on software methods. Even in low battery conditions, as long as charging activates the terminal When the battery of the terminal device is removed, the charging protection circuit 100 of the present disclosure can enter the normal working state, thereby well protecting the terminal device.
  • the excess voltage is subtracted from the battery voltage through a low dropout regulator (LDO) or a switching transistor, and a regulated output voltage (ie, reference voltage VREF) is generated.
  • LDO low dropout regulator
  • VREF regulated output voltage
  • the voltage is divided by the fourth resistor R4, the fifth resistor R5 and the sixth resistor R6, so that the first preset voltage V1 is output at the first output terminal of the reference voltage generation circuit 24, and is output at the first output terminal of the reference voltage generation circuit 24.
  • the second output terminal outputs the second preset voltage V2.
  • the positions of the first output terminal and the second output terminal of the reference voltage generating circuit 24 and the output voltage value can be set according to actual needs, and are not specifically limited here.
  • the terminal device includes a charging interface 200, a charging chip 300, and the charging protection circuit 100 in the present disclosure.
  • the charging interface 200 of the terminal device and the charging chip 300 can be connected through a charging path and a configuration path, so that the terminal device can be charged when the charging interface 200 is connected to an external charger.
  • the charging interface 200 may be an interface of a USB Type-C connector for connecting to an external charger.
  • the charging chip 300 of the terminal device can interact with the charging chip 300 of the charger when the charging interface 200 is connected to an external charger. If the charging path and configuration path between the charging interface 200 of the terminal device and the charging chip 300 are disconnected, , stop charging the terminal device.
  • FIG. 7 is a schematic flow chart of a charging protection method provided by the present disclosure.
  • This charging protection method is applied to the charging protection circuit 100 in the present disclosure.
  • the control circuit of the charging protection circuit 100 is used to control the corresponding switch circuits 10 on the charging path and the configuration path to be turned on or off at the same time.
  • the charging protection method includes steps S101 to S103.
  • Step S101 Obtain the interface parameters of the charging interface.
  • the interface parameters of the charging interface 200 include at least one of interface temperature parameters, interface charging voltage, and interface charging current.
  • the interface temperature parameter can be obtained by detecting the temperature of the charging interface 200 or near the charging interface 200;
  • the interface charging voltage can be obtained by detecting the voltage of the bus path;
  • the interface charging current can be obtained by detecting the current of the bus path or the ground path.
  • interface parameters may include but are not limited to interface temperature parameters, interface charging voltage and interface charging current, which are not specifically limited here. It can be understood that all parameters that can be used to detect the status of the charging interface 200 can be used as interface parameters.
  • Step S102 Determine the working status of the charging interface according to the interface parameters.
  • the working state of the charging interface 200 may include at least one of a temperature state, a voltage state and a current state. It should be noted that the working state of the charging interface 200 corresponds to the interface parameters of the charging interface 200 .
  • the temperature status of the charging interface 200 is determined based on the temperature feedback voltage and the first preset voltage; the voltage status of the charging interface 200 is determined based on the interface charging voltage and the second preset voltage; and the temperature status of the charging interface 200 is determined based on the interface charging current and the preset voltage.
  • the current determines the current state of the charging interface 200; if the temperature state and/or voltage state and/or current state of the charging interface 200 is an abnormal state, then it is determined that the working state of the charging interface 200 is an abnormal state; if the temperature state of the charging interface 200 If both the voltage state and the current state are normal, it is determined that the working state of the charging interface 200 is a normal state.
  • Step S103a If the working state of the charging interface is an abnormal state, the control switch circuit is turned off at the same time.
  • the switch circuit 10 on the charging path and the switch circuit 10 on the configuration path are controlled to be disconnected at the same time, thereby stopping charging of the terminal device.
  • the switch circuit 10 on the bus path, the switch circuit 10 on the ground path, and the switch circuit 10 on the configuration path can also be controlled to be turned off at the same time. Turn on, thereby providing more comprehensive charging protection to the terminal device when the terminal device performs high-power charging.
  • Step S103b If the working state of the charging interface is normal, control the switch circuit to be turned on at the same time.
  • the switch circuit 10 on the charging path and the switch circuit 10 on the configuration path are controlled to be turned on at the same time, thereby continuing to charge the terminal device.
  • the switch circuit 10 on the bus path, the switch circuit 10 on the ground path, and the switch circuit 10 on the configuration path can also be controlled to conduct simultaneously. Therefore, when the terminal device is charging at high power, the terminal device can be charged more comprehensively and protected, and the terminal device can continue to be charged.
  • the charging protection method detects the interface parameters of the charging interface, generates a control signal based on the interface parameters, and finally controls the switch circuit on the charging path and the switch circuit on the configuration path to be turned on at the same time based on the control signal generated by the interface parameters. Or disconnected at the same time, which can improve the safety of the terminal device when charging, and at the same time prevent backflow in the configuration path, effectively protect the charging chip of the terminal device when the terminal device is charging, and improve the user's experience of using the terminal device.
  • FIG. 8 is a schematic structural block diagram of a terminal device provided by the present disclosure.
  • the terminal device 1000 includes a processor 400 and a memory 500.
  • the processor 400 and the memory 500 are connected through a bus 600, which is, for example, an I2C (Inter-integrated Circuit) bus.
  • I2C Inter-integrated Circuit
  • the processor 400 is used to provide computing and control capabilities to support the operation of the entire terminal device.
  • the processor 400 can be a central processing unit (Central Processing Unit, CPU).
  • the processor 400 can also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC). ), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • the general processor may be a microprocessor or the processor may be any conventional processor.
  • the memory 500 may be a Flash chip, a read-only memory (ROM, Read-Only Memory) disk, an optical disk, a USB disk, a mobile hard disk, or the like.
  • ROM read-only memory
  • the memory 500 may be a Flash chip, a read-only memory (ROM, Read-Only Memory) disk, an optical disk, a USB disk, a mobile hard disk, or the like.
  • FIG. 8 is only a block diagram of a partial structure related to the disclosed solution, and does not constitute a limitation on the terminal equipment to which the disclosed solution is applied.
  • a specific server may include There may be more or fewer parts than shown, or certain parts may be combined, or may have a different arrangement of parts.
  • the processor is used to run a computer program stored in the memory, and implement any charging protection method provided by the present disclosure when executing the computer program.
  • the processor is used to run a computer program stored in the memory, and implement the following steps when executing the computer program: obtain the interface parameters of the charging interface; determine the working status of the charging interface according to the interface parameters; if the charging interface is working If the state is an abnormal state, the control switch circuit is turned off at the same time; if the working state of the charging interface is a normal state, the control switch circuit is turned on at the same time.
  • the present disclosure also provides a storage medium for computer-readable storage.
  • the storage medium stores one or more programs.
  • the one or more programs can be executed by one or more processors to implement any of the tasks provided by the present disclosure.
  • the steps of a charge protection method are not limited to.
  • the storage medium may be an internal storage unit of the terminal device of the aforementioned embodiment, such as a hard disk or memory of the terminal device.
  • the storage medium can also be an external storage device of the terminal device, such as a plug-in hard drive equipped on the terminal device, a Smart Media Card (SMC), a Secure Digital (SD) card, or a Flash Card (Flash Card). wait.
  • SMC Smart Media Card
  • SD Secure Digital
  • Flash Card Flash Card
  • Such software may be distributed on computer-readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media).
  • computer storage media includes volatile and nonvolatile media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. removable, removable and non-removable media.
  • Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disk (DVD) or other optical disk storage, magnetic cassettes, tapes, disk storage or other magnetic storage devices, or may Any other medium used to store the desired information and that can be accessed by a computer.
  • communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .
  • the present disclosure provides a charging protection circuit, terminal equipment, charging protection method and storage medium.
  • the present disclosure detects the interface parameters of the charging interface, generates a control signal according to the interface parameters, and finally controls the switch circuit to simultaneously conduct the switching circuit according to the control signal generated by the interface parameters. On or off at the same time, this can improve the safety of the terminal equipment during high-power charging, and at the same time prevent backflow in the configuration path, effectively protect the charging chip of the terminal equipment when the terminal equipment is charging, and improve the user's safety for the terminal equipment. usage experience.
  • the present disclosure aims to improve the safety of terminal equipment when charging and to effectively protect the charging chip of the terminal equipment when charging.

Abstract

本公开提供一种充电保护电路、充电保护方法、终端设备及存储介质，属于充电保护技术领域。该充电保护电路包括至少两个开关电路、检测电路和控制电路；两个开关电路分别连接在终端设备的充电接口和充电芯片之间的充电通路和配置通路上；检测电路用于检测充电接口的接口参数；控制电路与检测电路和开关电路连接，用于根据接口参数生成控制信号；其中，控制电路用于根据接口参数生成的控制信号控制开关电路同时导通或同时断开。

Description

充电保护电路、充电保护方法、终端设备及存储介质
相关申请的交叉引用
本公开要求享有2022年03月29日提交的名称为“充电保护电路、充电保护方法、终端设备及存储介质”的中国专利申请CN202210319337.3的优先权，其全部内容通过引用并入本公开中。
技术领域
本公开涉及充电保护技术领域，尤其涉及一种充电保护电路、充电保护方法、终端设备及存储介质。
背景技术
通用串行总线(Universal Serial Bus，USB)是一种通用接口。基于终端设备小型化的需求，USB连接器的尺寸亦须小型化。若终端设备出现进水、进入铁屑或碳粉等情况，会导致USB连接器的电力引脚、GND引脚和CC引脚对应的通路均存在出现短路的情况，进而可能会导致终端设备在充电过程中出现烧毁现象，甚至引起火灾等意外。虽然在充电端口异常时断开总线(BUS)通路或地线通路一般可以起到保护终端设备的作用，但是却不能有效地保护终端设备的充电芯片。本领域存在终端设备充电时安全性较低的技术问题。
发明内容
本公开提供一种充电保护电路、终端设备、充电保护方法、及存储介质，旨在解决本领域存在终端设备充电时安全性较低的技术问题。
第一方面，本公开提供一种充电保护电路，电路包括至少两个开关电路、检测电路和控制电路；两个开关电路分别连接在终端设备的充电接口和充电芯片之间的充电通路和配置通路上；检测电路用于检测充电接口的接口参数；控制电路与检测电路连接，用于根据接口参数生成控制信号；其中，控制电路用于根据控制信号控制开关电路同时导通或同时断开。
第二方面，本公开还提供一种终端设备，终端设备包括充电接口、充电芯片和如本公开说明书提供的任一项的充电保护电路。
第三方面，本公开还提供一种充电保护方法，终端设备包括如本公开说明书提供的任一项的充电保护电路，充电保护方法包括：获取充电接口的接口参数；根据接口参数确定充电接口的工作状态；若充电接口的工作状态为异常状态，则控制开关电路同时断开；若充电接口的工作状态为正常状态，则控制开关电路同时导通。
第四方面，本公开还提供一种存储介质，用于计算机可读存储，存储介质存储有一个或者多个程序，一个或者多个程序可被一个或者多个处理器执行，以实现如本公开说明书提供的任一项的充电保护方法的步骤。
附图说明
为了更清楚地说明本公开技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本公开提供的一种终端设备的结构示意性图一；
图2为本公开提供的一种终端设备的结构示意性图二；
图3为本公开提供的一种检测电路的结构示意框图；
图4为本公开提供的一种终端设备的结构示意性图三；
图5为本公开提供的一种充电保护电路的电路示意图；
图6为本公开提供的一种参考电压生成电路的电路示意图；
图7为本公开提供的一种充电保护方法的流程示意图；
图8为本公开提供的一种终端设备的结构示意性框图。
具体实施方式
下面将结合本公开中的附图，对本公开中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
附图中所示的流程图仅是示例说明，不是必须包括所有的内容和操作/步骤，也不是必须按所描述的顺序执行。例如，有的操作/步骤还可以分解、组合或部分合并，因此实际执行的 顺序有可能根据实际情况改变。
应当理解，在此本公开说明书中所使用的术语仅仅是出于描述特定实施例的目的而并不意在限制本公开。如在本公开说明书和所附权利要求书中所使用的那样，除非上下文清楚地指明其它情况，否则单数形式的“一”、“一个”及“该”意在包括复数形式。
通用串行总线(Universal Serial Bus，USB)是一种数据交换的通用接口，USB作为一个标准协议接口，以其支持大批量数据传输和支持热插拔等特性，成为多种外设所采用的制式接口。目前，无线通信领域的迅猛发展，各种各样的通信设备，如个人手持电话、商务通、平板电脑类等终端设备，也越来越被用户所广泛使用。
基于终端设备小型化的需求，USB连接器的尺寸亦须小型化。例如，USB标准组织提出了新一代的USB Type-C连接器标准，以满足小型化的需求，USB Type-C连接器包括配置通路(configuration channel，CC)引脚、总线通路(Vbus)引脚与其它引脚。若终端设备出现进水、进入铁屑或碳粉等情况，会导致USB连接器的电力引脚、GND引脚和CC引脚对应的通路均存在出现短路的情况，进而可能会导致终端设备在充电过程中出现烧毁现象，甚至引起火灾等意外。虽然在充电端口异常时断开总线(BUS)通路或地线通路一般可以起到保护终端设备的作用，但是却不能有效地保护终端设备的充电芯片。
现有的USB连接器一般包括Micro-USB连接器和USB Type-C连接器。现有的充电保护方法一般针对于Micro-USB连接器，当使用Micro-USB连接器对终端设备进行充电时，终端设备的Micro USB接口与充电器的Micro USB接口连接。在一示例性实施例中，终端设备的Micro USB接口的分别Vbus引脚、GND引脚、Data+引脚和Data-引脚分别与充电器的Micro USB接口的Vbus引脚、GND引脚、Data+引脚和Data-引脚连接。由于Micro-USB连接器的Vbus引脚和GND引脚用于电力传输，Data+引脚、Data-引脚用于传输数据，因此对于Micro-USB连接器，可以在充电端口异常时仅断开总线(BUS)通路或地线(GND)通路即可起到保护手机终端产品的作用，无需断开Data+引脚和Data-引脚的通路也不会损害终端设备。
与Micro-USB连接器相比，USB Type-C连接器新增了配置通道，它有检测正反插、检测USB连接、识别可以提供多大的电压和电流以及建立与管理USB设备间数据与VBUS的连接等作用。因此USB Type-C连接器可以通过新增的配置通道实现大功率充电，若在充电端口异常时仅仅断开总线通路或地线通路，配置通路可能会与其它通路出现回流，从而导致出现配置通路短路的情况，从而对终端的设备的充电芯片造成损害。
本公开提供一种充电保护电路、终端设备、充电保护方法及存储介质。其中，该充电保 护电路可应用于终端设备中，通过同时断开充电通路和配置通路，提高终端设备充电时的安全性，同时能够防止配置通路出现回流，能够在终端设备充电时有效地保护终端设备的充电芯片。
请参照图1，图1为本公开提供的一种充电保护电路的结构示意图。
如图1所示，该充电保护电路100包括：至少两个开关电路10、检测电路20和控制电路30。
在一示例性实施例中，至少两个开关电路10分别连接在终端设备的充电接口200和充电芯片300之间的充电通路和配置通路上。其中，终端设备可以是智能手机、平板电脑、笔记本电脑、台式计算机、智能音箱、智能手表等，但并不局限于此。终端设备的充电接口200和充电芯片300之间可以通过充电通路和配置通路连接，从而可以在充电接口200与外接的充电器连接时，对终端设备进行充电。在本实施例中，充电接口200可以为USB Type-C连接器的接口，用于与外接的充电器连接。终端设备的充电芯片300可以在充电接口200与外接的充电器连接时，与充电器的充电芯片300进行交互，若终端设备的充电接口200和充电芯片300之间的充电通路和配置通路同时断开时，则停止对终端设备进行充电。
检测电路20用于检测充电接口200的接口参数，该接口参数可以通过检测充电接口200的状态得到；控制电路30与检测电路20和开关电路10连接，用于根据接收到的接口参数生成控制信号，在一示例性实施例中，控制电路30用于根据接收到的接口参数判断充电接口200的状态是否为异常状态，该控制信号用于反馈充电接口200的状态是否为异常状态，需要说明的是，控制信号可以为电平信号等，可以反馈充电接口200的状态的信号。控制电路30还用于根据接口参数生成的控制信号控制开关电路10同时导通或同时断开。具体是，控制电路30还用于根据接口参数生成的控制信号控制充电通路上的开关电路10和配置通路上的开关电路10同时导通，或者，控制电路30还用于根据接口参数生成的控制信号控制充电通路上的开关电路10和配置通路上的开关电路10同时断开。
在一示例性实施例中，当控制信号反馈充电接口200的状态为异常状态时，控制电路30控制充电通路上的开关电路10和配置通路上的开关电路10同时断开，从而停止对终端设备进行充电；当控制信号反馈充电接口200的状态为正常状态时，控制电路30控制充电通路上的开关电路10和配置通路上的开关电路10同时导通，从而继续对终端设备进行充电。
在检测到充电接口200的状态为异常状态时，通过同时断开充电接口200和充电芯片300之间的充电通路和配置通路，能够提高终端设备在大功率充电时的安全性，同时还能够防止配置通路出现回流，从而能够在终端设备充电时有效地保护终端设备的充电芯片300，提高 用户的对于终端设备的使用体验。
在一些实施例中，如图2所示，充电通路包括总线通路BUS和地线通路GND，总线通路和地线通路均设置有开关电路10。
其中，控制电路30用于根据控制信号控制开关电路10同时导通或同时断开。在一示例性实施例中，控制电路30用于根据接口参数生成的控制信号控制总线通路上的开关电路10、地线通路上的开关电路10以及配置通路上的开关电路10同时导通或同时断开。
在本实施例中，通过在检测到充电接口200的状态为异常状态时，通过同时断开充电接口200和充电芯片300之间的总线通路、地线通路以及配置通路，即可以提高终端设备在大功率充电时的安全性，也能够防止配置通路出现回流，从而能够在终端设备充电时有效地保护终端设备的充电芯片300。但是若仅仅断开总线通路和配置通路，也不能完全保证地线通路不会出现回流，因此可能仍存在对终端设备造成损害的风险，因此在总线通路和地线通路均设置有开关电路10，并通过控制电路30根据接口参数生成的控制信号控制总线通路、地线和配置通路上各自对应的开关电路10同时导通或同时断开，从而在终端设备进行大功率充电时，更全面地对终端设备进行充电保护。
在一示例性实施例中，当控制信号反馈充电接口200的状态为异常状态时，控制电路30控制总线通路、地线通路和配置通路上各自对应的开关电路10同时断开，从而停止对终端设备进行充电；当控制信号反馈充电接口200的状态为正常状态时，控制电路30控制总线通路、地线通路和配置通路上各自对应的开关电路10同时导通，从而继续对终端设备进行充电。
在一些实施例中，接口参数包括接口温度参数、接口充电电压和接口充电电流中的至少一种。
其中，接口温度参数可以通过检测充电接口200或充电接口200附近的温度得到；接口充电电压可以通过检测总线通路的电压得到；接口充电电流可以通过检测总线通路或地线通路的电流得到。
需要说明的是，接口参数可以包括但不限于接口温度参数、接口充电电压和接口充电电流，在此不做具体限定。可以理解的是，一切可以用于检测充电接口200状态的参数均可以作为接口参数。
在一些实施例中，如图3所示，检测电路20可以包括温度检测电路21、电压检测电路22和电流检测电路23中的至少一种。可以理解的是，即需要对哪种接口参数进行检测时，检测电路20就会包括对应的电路。在一示例性实施例中，若需要对接口温度参数和接口充电 电压进行检测时，此时检测电路20可以包括温度检测电路21和电压检测电路22。由此可以通过温度检测电路21、电压检测电路22和电流检测电路23分别检测充电接口200的温度状态、电压状态和电流状态，能够更全面检测充电接口200是否存在异常。
其中，温度检测电路21与控制电路30连接，温度检测电路21用于获取接口温度参数，并根据接口温度参数生成温度反馈电压；电压检测电路22与充电接口200和控制电路30连接，电压检测电路22用于获取接口充电电压，在一示例性实施例中，电压检测电路22可以与总线通路连接即可检测得到接口充电电压；电流检测电路23与充电接口200和控制电路30连接，电流检测电路23用于获取接口充电电流，在一示例性实施例中，电流检测电路23可以与总线通路或地线通路连接即可检测得到接口充电电流。
在一示例性实施例中，控制电路30可以根据温度反馈电压确定充电接口200的温度状态是否异常，控制电路30可以根据接口充电电压确定充电接口200的电压状态是否异常，控制电路30可以根据接口充电电流确定充电接口200的电流状态是否异常；若充电接口200的温度状态和/或电压状态和/或电流状态为异常，控制电路30则控制充电通路和配置通路上各自对应的开关电路10同时断开；若充电接口200的温度状态和电压状态和电流状态均为正常，控制电路30则控制充电通路和配置通路上各自对应的开关电路10同时导通。
在一些实施例中，如图4所示，控制电路30包括比较器电路31和逻辑门32，比较器电路31包括至少一个比较器，比较器的其中一个输入端与检测电路20连接；逻辑门32的输入端与比较器的输出端连接，逻辑门32的输出端与开关电路10连接，用于输出控制信号。由此可以通过比较器电路31和逻辑门32配合使用，准确地判断充电接口200是否存在异常，同时比较器电路31和逻辑门32配合使用的成本更低，电路实现更简单。
其中，比较器的数量可以根据检测电路20确定，若有多个比较器，逻辑门32的各个输入端分别与各个比较器的输出端连接，逻辑门32的输出端与各个开关电路10连接，用于根据控制信号控制充电通路和配置通路上各自对应的开关电路10同时导通或同时断开。
在一示例性实施例中，若检测电路20包括温度检测电路21和电压检测电路22，比较器的数量则为2个，第一比较器310的其中一个输入端与温度检测电路21连接，第二比较器311的其中一个输入端与电压检测电路22连接，且第一比较器310和第二比较器311的输出端分别与逻辑门32的输入端连接，由此可以通过比较器电路31和逻辑门32进行逻辑判断，准确地判断充电接口200是否存在异常，同时比较器电路31和逻辑门32配合使用的成本更低，电路实现更简单。
在一些实施例中，检测电路20包括温度检测电路21和/或电压检测电路22和/或电流检 测电路23；比较器电路31包括第一比较器310和/或第二比较器311和/或第三比较器。其中，第一比较器310的第一输入端与温度检测电路21连接，第一比较器310的第二输入端连接第一预设电压；第二比较器311的第一输入端与电压检测电路22连接，第二比较器311的第二输入端连接第二预设电压；第三比较器的第一输入端与电流检测电路23连接，第三比较器的第二输入端连接预设电流。
其中，第一预设电压为温度反馈电压对应的基准电压，第二预设电压为接口充电电压对应的基准电压，预设电流为接口充电电流对应的基准电流，第一预设电压、第二预设电压和预设电流可以分别作为温度反馈电压、接口充电电压和接口充电电流对应的判断基础，均可以根据用户需求或运营商进行具体设置。第一比较器310、第二比较器311和第三比较器可以为正向比较器或反向比较器，具体可以根据实际需求设置。
在一示例性实施例中，第一比较器310的第一输入端与温度检测电路21连接，第一比较器310的第二输入端连接第一预设电压，可以通过第一比较器310比较温度反馈电压与第一预设电压，并在通过第一比较器310的输出端输出对应的电平信号，从而确定充电接口200的温度状态是否存在异常；第二比较器311的第一输入端与电压检测电路22连接，第二比较器311的第二输入端连接第二预设电压，可以通过第二比较器311比较接口充电电压与第二预设电压，并在通过第二比较器311的输出端输出对应的电平信号，从而确定充电接口200的电压状态是否存在异常；第三比较器的第一输入端与电流检测电路23连接，第三比较器的第二输入端连接预设电流，可以通过第三比较器比较接口充电电流与预设电流，并在通过第三比较器的输出端输出对应的电平信号，从而确定充电接口200的电流状态是否存在异常。最后逻辑门32根据第一比较器310、第二比较器311和第三比较器分别输出的电平信号输出控制信号，若充电接口200的温度状态、电压状态和电流状态中任一项出现异常，控制各开关电路10断开。
在一些实施例中，逻辑门32可以包括与门、或门、与非门、或非门任意一种。
其中，逻辑门32可以根据比较器的实际判断逻辑综合确定，可以理解的是，逻辑门32输出的控制信号能够正确反馈充电接口200是否异常。
在一示例性实施例中，如图5所示，若检测电路20包括温度检测电路21和电压检测电路22，逻辑门32为与门。第一比较器310的第一输入端与温度检测电路21连接，获取温度反馈电压，第一比较器310的第二输入端连接第一预设电压，此时第一比较器310为正向比较器，所以当温度反馈电压大于第一预设电压(即VRTC>V1)时，此时第一比较器310的输出端输出高电平；当温度反馈电压小于第一预设电压(即VRTC<V1)时，此时第一比较器 310的输出端输出低电平。
表1为第一比较器对应的真值表。
表1
第二比较器311的第一输入端与电压检测电路22连接，获取接口充电电压，第二比较器311的第二输入端连接第二预设电压，此时第二比较器311为反向比较器，所以当接口充电电压小于第二预设电压(即VBUS<V2)时，此时第二比较器311的输出端输出高电平；当接口充电电压大于第二预设电压(即VBUS>V2)时，此时第二比较器311的输出端输出低电平。
表2为第二比较器对应的真值表。
表2
最后第一比较器310的输出端与与门的第一输入端连接，第二比较器311的输出端与与门的第二输入端连接，通过与门进行逻辑计算，最后输出控制信号S。
表3为与门对应的真值表。
表3

当充电接口200的温度和电压均为正常状态时，此时接口温度低于预设温度阈值，即所得到的温度反馈电压高于第一预设电压，即VRTC>V1，第一比较器310输出高电平；接口充电电压低于第二预设电压，即VBUS<V2，第二比较器311输出高电平；这样经过与门后控制信号S也为高电平，从而将各开关电路10导通以对终端设备进行充电。也就是说，只有各个检测状态都是正常的，各开关电路10才是导通状态。
当充电接口200的温度为异常状态时，此时接口温度高于预设温度阈值，即所得到的温度反馈电压低于第一预设电压，即VRTC<V1，第一比较器310输出低电平。当充电接口200的电压为异常状态时，此时接口充电电压高于第二预设电压，即VBUS>V2，第二比较器311输出低电平。由于此时逻辑门32为与门，因此只要有一个输入端输入为低电平，则经过与门后控制信号S为低电平，从而将各开关电路10断开以停止对终端设备进行充电。也就是说，只要有一个检测状态是异常的，各开关电路10便会断开，从而将充电接口200和充电芯片300之间的充电通路和配置通路同时断开，起到保护终端设备的作用。当检测点都由异常状态恢复到正常状态时，比较器会进行比较输出正常控制信号，从而使充电接口200和充电芯片300之间的各通路回到正常通路状态。
需要说明的是，若逻辑门32为或门、与非门或或非门，只需要对应设置第一比较器310和第二比较器311的类型(正向比较器或反向比较器)，和/或对应调整第一比较器310和第二比较器311各自的第一输入端和第二输入端即可。
在一些实施例中，如图5所示，温度检测电路21包括热敏电阻和分压电阻，热敏电阻的第一端与第一比较器310的第一输入端连接，热敏电阻的第二端接地；分压电阻的第一端与热敏电阻的第一端连接，分压电阻的第二端连接第三预设电压。由此可以通过设置热敏电阻和分压电压准确地生成温度反馈电压，从而准确地控制各开关电路10同时导通或同时断开。
其中，热敏电阻RT可以设置在充电接口200处或靠近充电接口200设置，热敏电阻对温度敏感，能够在不同的温度下表现出不同的电阻值。热敏电阻可以包括正温度系数热敏电阻器(Positive Temperature Coefficient，PTC)和负温度系数热敏电阻器(Negative Temperature Coefficient，NTC)。正温度系数热敏电阻器在温度越高时电阻值越大，负温度系数热敏电阻器在温度越高时电阻值越低。分压电阻为第一电阻R1，由于第三预设电压即参考电压(VREF)的电压与第一预设电压V1存在一定比例，因此可以按照实际需求使用第一电阻R1进行分压， 并与热敏电阻生成温度反馈电压。第三预设电压为参考电压(VREF)，用于为分压电阻提供电压。
在一示例性实施例中，温度检测电路21用于根据热敏电阻的阻值、分压电阻的阻值和第三预设电压值生成温度反馈电压。在一示例性实施例中，若使用负温度系数热敏电阻器，若接口温度不断升高，热敏电阻的阻值降低，同时生成的温度反馈电压也会降低，当接口温度高于预设温度阈值时，第一比较器310检测到温度反馈电压低于第一预设电压，即VRTC<V1时，则确定充电接口200的温度状态异常，控制充电通路和配置通路上各自对应的开关电路10同时断开。
同理，接口充电电压VBUS与第二预设电压V2存在一定比例，电压检测电路22也与温度检测电路21类似，包括第二电阻R2和第三电阻R3，也起到分压的作用。
在一些实施例中，开关电路10用于使充电通路和配置通路导通或断开，开关电路10可以为开关、开关管等。
在一示例性实施例中，开关电路10为MOS管，此时MOS管用作开关。其中，各MOS管的栅极与逻辑门32的输出端连接，各MOS管的源级分别与充电芯片300的BUS引脚、GND引脚和CC引脚连接，各MOS管的漏级分别与充电接口200的BUS引脚、GND引脚和CC引脚连接。通过使用MOS管作开关可以将MOS管很好的集成在电路中。
在一些实施例中，如图6所示，检测电路20还包括参考电压生成电路24；其中参考电压生成电路24的输入端连接电池电压；参考电压生成电路24的第一输出端与第一比较器310的第二输入端连接，用于输出第一预设电压；参考电压生成电路24的第二输出端与第二比较器311的第二输入端连接，用于输出第二预设电压。
其中，现有的充电保护电路100一般是通过断开终端设备与充电线之间的通路实现的，因此参考电压生成电路24不能由电池电压供电，只能由VBUS供电。而在终端设备处于关机状态或低电情况下，可能会存在VBUS不稳定的情况，因此参考电压生成电路24生成的第一预设电压、第二预设电压和第三预设电压也会波动，从而导致终端设备在关机状态反复充电停充的异常现象发生，进而损害终端设备的充电芯片300。
而本公开的电池电压(VBAT)可以在系统掉电或低功耗模式的情况下为本公开的充电保护电路100供电，具体可以从终端设备的VDD电源或专门的备用电池获得电压。因此只要电池在位，不管终端设备进行充电的时候是开机还是关机，都是存在电池电压的，这就保证了不论开机状态还是关机状态，都可以通过本公开的充电保护电路100来检测控制，避免了靠软件方法在关机状态反复充电停充的异常现象发生。即使在低电情况下，只要充电激活终 端设备的电池，本公开的充电保护电路100即可进入正常工作状态，从而很好的保护终端设备。
在一示例性实施例中，电池电压通过低压差线性稳压器(low dropout regulator，LDO)或开关管减去超额的电压，并产生经过调节的输出电压(即基准电压VREF)。最后再通过第四电阻R4、第五电阻R5和第六电阻R6进行分压，从而在参考电压生成电路24的第一输出端输出第一预设电压V1，并在参考电压生成电路24的第二输出端输出第二预设电压V2。
需要说明的是，参考电压生成电路24的第一输出端和第二输出端的位置以及输出电压值可以根据实际需要设置，在此不做具体限定。
在一些实施例中，终端设备包括充电接口200、充电芯片300和本公开中的充电保护电路100。
其中，终端设备的充电接口200和充电芯片300之间可以通过充电通路和配置通路连接，从而可以在充电接口200与外接的充电器连接时，对终端设备进行充电。在本实施例中，充电接口200可以为USB Type-C连接器的接口，用于与外接的充电器连接。终端设备的充电芯片300可以在充电接口200与外接的充电器连接时，与充电器的充电芯片300进行交互，若终端设备的充电接口200和充电芯片300之间的充电通路和配置通路断开时，则停止对终端设备进行充电。
请参照图7，图7为本公开提供的一种充电保护方法的流程示意图。该充电保护方法应用于本公开中的充电保护电路100，具体应用充电保护电路100的控制电路，用于控制充电通路和配置通路上各自对应的开关电路10同时导通或同时断开。
如图7所示，该充电保护方法包括步骤S101至步骤S103。
步骤S101、获取充电接口的接口参数。
其中，充电接口200的接口参数包括接口温度参数、接口充电电压和接口充电电流中的至少一种。接口温度参数可以通过检测充电接口200或充电接口200附近的温度得到；接口充电电压可以通过检测总线通路的电压得到；接口充电电流可以通过检测总线通路或地线通路的电流得到。
需要说明的是，接口参数可以包括但不限于接口温度参数、接口充电电压和接口充电电流，在此不做具体限定。可以理解的是，一切可以用于检测充电接口200状态的参数均可以作为接口参数。
步骤S102、根据接口参数确定充电接口的工作状态。
其中，充电接口200的工作状态可以包括温度状态、电压状态和电流状态中的至少一种。需要说明的是，充电接口200的工作状态与充电接口200的接口参数相对应。
在一示例性实施例中，根据温度反馈电压和第一预设电压确定充电接口200的温度状态；根据接口充电电压和第二预设电压确定充电接口200的电压状态；根据接口充电电流和预设电流确定充电接口200的电流状态；若充电接口200的温度状态和/或电压状态和/或电流状态为异常状态，则确定充电接口200的工作状态为异常状态；若充电接口200的温度状态和电压状态和电流状态均为正常，则确定充电接口200的工作状态为正常状态。
步骤S103a、若充电接口的工作状态为异常状态，则控制开关电路同时断开。
其中，当确定充电接口200的工作状态为异常状态时，则控制充电通路上的开关电路10和配置通路上的开关电路10同时断开，从而停止为终端设备进行充电。
在一示例性实施例中，当确定充电接口200的工作状态为异常状态时，还可以控制总线通路上的开关电路10、地线通路上的开关电路10和配置通路上的开关电路10同时断开，从而在终端设备进行大功率充电时，更全面地对终端设备进行充电保护。
步骤S103b、若充电接口的工作状态为正常状态，则控制开关电路同时导通。
其中，当确定充电接口200的工作状态为正常状态时，则控制充电通路上的开关电路10和配置通路上的开关电路10同时导通，从而继续为终端设备进行充电。
在一示例性实施例中，当确定充电接口200的工作状态为正常状态时，还可以控制总线通路上的开关电路10、地线通路上的开关电路10和配置通路上的开关电路10同时导通，从而在终端设备进行大功率充电时，更全面地对终端设备进行充电保护，并继续为终端设备进行充电。
上述实施例提供的充电保护方法，通过检测充电接口的接口参数，并根据接口参数生成控制信号，最后根据接口参数生成的控制信号控制充电通路上的开关电路和配置通路上的开关电路同时导通或同时断开，由此可以提高终端设备充电时的安全性，同时能够防止配置通路出现回流，能够在终端设备充电时有效地保护终端设备的充电芯片，提高用户的对于终端设备的使用体验。
请参阅图8，图8为本公开提供的一种终端设备的结构示意性框图。
如图8所示，终端设备1000包括处理器400和存储器500，处理器400和存储器500通过总线600连接，该总线比如为I2C(Inter-integrated Circuit)总线。
在一示例性实施例中，处理器400用于提供计算和控制能力，支撑整个终端设备的运行。 处理器400可以是中央处理单元(Central Processing Unit，CPU)，该处理器400还可以是其他通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field-Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。其中，通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
在一示例性实施例中，存储器500可以是Flash芯片、只读存储器(ROM，Read-Only Memory)磁盘、光盘、U盘或移动硬盘等。
本领域技术人员可以理解，图8中示出的结构，仅仅是与本公开方案相关的部分结构的框图，并不构成对本公开方案所应用于其上的终端设备的限定，具体的服务器可以包括比图中所示更多或更少的部件，或者组合某些部件，或者具有不同的部件布置。
其中，处理器用于运行存储在存储器中的计算机程序，并在执行计算机程序时实现本公开提供的任意一种充电保护方法。
在一实施例中，处理器用于运行存储在存储器中的计算机程序，并在执行计算机程序时实现如下步骤：获取充电接口的接口参数；根据接口参数确定充电接口的工作状态；若充电接口的工作状态为异常状态，则控制开关电路同时断开；若充电接口的工作状态为正常状态，则控制开关电路同时导通。
需要说明的是，所属领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的终端设备的具体工作过程，可以参考前述充电保护方法实施例中的对应过程，在此不再赘述。
本公开还提供一种存储介质，用于计算机可读存储，存储介质存储有一个或者多个程序，一个或者多个程序可被一个或者多个处理器执行，以实现如本公开说明书提供的任一项充电保护方法的步骤。
其中，存储介质可以是前述实施例的终端设备的内部存储单元，例如终端设备的硬盘或内存。存储介质也可以是终端设备的外部存储设备，例如终端设备上配备的插接式硬盘，智能存储卡(Smart Media Card，SMC)，安全数字(Secure Digital，SD)卡，闪存卡(Flash Card)等。
本领域普通技术人员可以理解，上文中所公开方法中的全部或某些步骤、系统、装置中的功能模块/单元可以被实施为软件、固件、硬件及其适当的组合。在硬件实施例中，在以上描述中提及的功能模块/单元之间的划分不一定对应于物理组件的划分；例如，一个物理组件可以具有多个功能，或者一个功能或步骤可以由若干物理组件合作执行。某些物理组件或所 有物理组件可以被实施为由处理器，如中央处理器、数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。这样的软件可以分布在计算机可读介质上，计算机可读介质可以包括计算机存储介质(或非暂时性介质)和通信介质(或暂时性介质)。如本领域普通技术人员公知的，术语计算机存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、程序模块或其他数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可移除介质。计算机存储介质包括但不限于RAM、ROM、EEPROM、闪存或其他存储器技术、CD-ROM、数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。此外，本领域普通技术人员公知的是，通信介质通常包含计算机可读指令、数据结构、程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据，并且可包括任何信息递送介质。
本公开提供一种充电保护电路、终端设备、充电保护方法及存储介质，本公开通过检测充电接口的接口参数，并根据接口参数生成控制信号，最后根据接口参数生成的控制信号控制开关电路同时导通或同时断开，由此可以提高终端设备在大功率充电时的安全性，同时能够防止配置通路出现回流，能够在终端设备充电时有效地保护终端设备的充电芯片，提高用户的对于终端设备的使用体验。本公开旨在提高终端设备充电时的安全性以及在终端设备充电时有效地保护终端设备的充电芯片。
应当理解，在本公开说明书和所附权利要求书中使用的术语“和/或”是指相关联列出的项中的一个或多个的任何组合以及所有可能组合，并且包括这些组合。需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者系统不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者系统所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者系统中还存在另外的相同要素。
上述本公开序号仅仅为了描述，不代表实施例的优劣。以上所述，仅为本公开的具体实施例，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以权利要求的保护范围为准。

Claims (12)

  1. 一种充电保护电路，包括：
    至少两个开关电路，分别连接在终端设备的充电接口和充电芯片之间的充电通路和配置通路上；
    检测电路，用于检测所述充电接口的接口参数；
    控制电路，与所述检测电路连接，用于根据所述接口参数生成控制信号；
    其中，所述控制电路用于根据所述控制信号控制所述开关电路同时导通或同时断开。
  2. 根据权利要求1所述的充电保护电路，其中，所述充电通路包括总线通路和地线通路，所述总线通路和所述地线通路均设置有开关电路。
  3. 根据权利要求1所述的充电保护电路，其中，所述接口参数包括接口温度参数、接口充电电压和接口充电电流中的至少一种。
  4. 根据权利要求3所述的充电保护电路，其中，所述检测电路包括：
    温度检测电路，与所述控制电路连接，所述温度检测电路用于根据所述接口温度参数生成温度反馈电压；和/或，
    电压检测电路，与所述充电接口和所述控制电路连接，所述电压检测电路用于获取所述接口充电电压；和/或，
    电流检测电路，与所述充电接口和所述控制电路连接，所述电流检测电路用于获取所述接口充电电流。
  5. 根据权利要求1所述的充电保护电路，其中，所述控制电路包括：
    比较器电路，所述比较器电路包括至少一个比较器，所述比较器的其中一个输入端与所述检测电路连接；
    逻辑门，所述逻辑门的输入端与所述比较器的输出端连接，所述逻辑门的输出端与所述开关电路连接，用于输出控制信号。
  6. 根据权利要求5所述的充电保护电路，其中，所述逻辑门包括与门、或门、与非门、或非门任意一种。
  7. 根据权利要求5或6所述的充电保护电路，其中，所述检测电路包括温度检测电路和/或电压检测电路和/或电流检测电路，所述比较器电路包括：
    第一比较器，所述第一比较器的第一输入端与所述温度检测电路连接，所述第一比较器 的第二输入端连接第一预设电压；和/或，
    第二比较器，所述第二比较器的第一输入端与所述电压检测电路连接，所述第二比较器的第二输入端连接第二预设电压；和/或，
    第三比较器，所述第三比较器的第一输入端与所述电流检测电路连接，所述第三比较器的第二输入端连接预设电流。
  8. 根据权利要求7所述的充电保护电路，其中，所述检测电路还包括参考电压生成电路；
    其中，所述参考电压生成电路的输入端连接电池电压；所述参考电压生成电路的第一输出端与所述第一比较器的第二输入端连接，用于输出所述第一预设电压；所述参考电压生成电路的第二输出端与所述第二比较器的第二输入端连接，用于输出所述第二预设电压。
  9. 根据权利要求7所述的充电保护电路，其中，所述温度检测电路包括：
    热敏电阻，所述热敏电阻的第一端与所述第一比较器的第一输入端连接，所述热敏电阻的第二端接地；
    分压电阻，所述分压电阻的第一端与所述热敏电阻的第一端连接，所述分压电阻的第二端连接第三预设电压；
    其中，所述温度检测电路用于根据所述热敏电阻的阻值、所述分压电阻的阻值和所述第三预设电压值生成所述温度反馈电压。
  10. 一种终端设备，包括充电接口、充电芯片和如权利要求1至9中任一项所述的充电保护电路。
  11. 一种充电保护方法，应用于如权利要求1-9任一项所述的充电保护电路，所述方法包括：
    获取充电接口的接口参数；
    根据所述接口参数确定所述充电接口的工作状态；
    若所述充电接口的工作状态为异常状态，则控制开关电路同时断开；
    若所述充电接口的工作状态为正常状态，则控制开关电路同时导通。
  12. 一种存储介质，用于计算机可读存储，所述存储介质存储有一个或者多个程序，所述一个或者多个程序可被一个或者多个处理器执行，以实现如权利要求10所述的充电保护方法的步骤。
PCT/CN2023/073433 2022-03-29 2023-01-20 充电保护电路、充电保护方法、终端设备及存储介质 WO2023185229A1 (zh)

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