CN113765165A - Charging interface, protection method and protection device for charging interface and storage medium - Google Patents
Charging interface, protection method and protection device for charging interface and storage medium Download PDFInfo
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- 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
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- 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
- H02J7/00304—Overcurrent protection
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- 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
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- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
Abstract
The disclosure relates to a charging interface, a protection method and a protection device for the charging interface, and a storage medium. This interface that charges includes: a charging circuit having a switching element; the detection module is used for detecting the charging parameters of the charging interface; the switch driving circuit is connected with the detection module, connected with the controlled end of the switch element and used for outputting a first control signal to the controlled end when the charging parameter represents that the charging voltage of the charging circuit is greater than a protection threshold value; outputting a second control signal to the controlled end when the charging parameter represents the short circuit of the charging interface; the switching element is used for conducting under the action of the first control signal and applying a clamping voltage within a preset range to the charging circuit; and the switch is conducted under the action of the second control signal and works in a preset state, and the impedance of the switch element is smaller than the preset impedance in the preset state. The charging interface of the present disclosure has overvoltage protection and short-circuit protection concurrently.
Description
Technical Field
The present disclosure relates to the field of electronic devices, and in particular, to a charging interface, a protection method for the charging interface, a protection device for the charging interface, and a storage medium.
Background
With the continuous development and maturation of electronic technology, electronic devices such as mobile phones, tablet computers, portable computers and the like also become essential tools for people to live and work. As the number of uses of the electronic device by the user increases, the electronic device needs to be charged frequently to ensure the electronic device can work normally due to the limited storage capacity of the battery in the electronic device.
However, when the electronic device is charged, a surge phenomenon may occur; in addition, the charging interface may be burnt out due to excessive temperature rise caused by short circuit in special situations (for example, impurities enter the charging interface). Therefore, the electronic device charging interface needs to be protected.
Disclosure of Invention
The disclosure provides a charging interface, a protection method and a protection device of the charging interface, and a storage medium.
According to a first aspect of the embodiments of the present disclosure, there is provided a charging interface, including: a charging circuit having a switching element;
the detection module is used for detecting the charging parameters of the charging interface;
the switch driving circuit is connected with the detection module, connected with the controlled end of the switch element and used for outputting a first control signal to the controlled end when the charging parameter represents that the charging voltage of the charging circuit is greater than a protection threshold value; when the charging parameters represent the short circuit of the charging interface, outputting a second control signal to the controlled end;
the switching element is used for conducting under the action of the first control signal and applying a clamping voltage within a preset range to the charging circuit; and the switching element is conducted under the action of the second control signal and works in a preset state, and the impedance of the switching element is smaller than the preset impedance in the preset state.
Optionally, the charging parameters include: charging voltage, the detection module includes: a voltage detection circuit;
the voltage detection circuit is connected with the switch element in parallel and is connected with the switch driving circuit; the control circuit is used for detecting the charging voltage of the charging circuit and controlling the switch driving circuit to output the first control signal to the controlled end when the charging voltage is determined to be larger than the protection threshold value.
Optionally, the charging parameters include: the charging temperature, detect the module, still include: the temperature detection assembly and the processing module;
the temperature detection component is at least used for detecting the charging temperature of the charging circuit;
the processing module is respectively connected with the temperature detection assembly and the switch driving circuit and used for receiving the charging temperature and controlling the switch driving circuit to output the second control signal when the charging temperature characterizes the short circuit of the charging interface.
Optionally, the temperature detecting assembly includes:
a first subassembly, disposed adjacent to the charging interface, for detecting a first temperature at the charging interface;
the second subassembly is positioned on the same circuit board with the processing module and is used for detecting a second temperature on the circuit board;
the processing module is respectively connected with the first subassembly and the second subassembly and used for determining whether the temperature difference between the first temperature and the second temperature is greater than a preset temperature difference or not, if the temperature difference between the first temperature and the second temperature is greater than the preset temperature difference, the charging temperature is determined to characterize the short circuit of the charging interface, and the switch driving circuit is controlled to output the second control signal.
Optionally, the processing module includes: a central processing unit;
and the central processing unit is connected with the switch driving circuit through a general purpose input/output (GPIO) pin.
According to a second aspect of the embodiments of the present disclosure, there is provided a protection method for a charging interface, which is applied to an electronic device, the method including:
determining a charging parameter of the electronic device;
when the charging parameter represents that the charging voltage is greater than the protection threshold value, outputting a first control signal; the first control signal is used for indicating the switching element in the charging interface to be conducted and applying a clamping voltage within a preset range to the switching element;
when the charging parameters represent the short circuit of the charging interface, outputting a second control signal; the second control signal is used for indicating the switching element to be conducted and work in a preset state, and the impedance of the switching element is smaller than the preset impedance in the preset state.
Optionally, the charging parameters include: a charging voltage, the method further comprising:
detecting a charging voltage of the electronic device and determining whether the charging voltage is greater than the protection threshold.
Optionally, the charging parameters include: a charging temperature, the method further comprising:
detecting a charging temperature of the electronic device;
the outputting a second control signal when the charging parameter represents that the charging interface is short-circuited comprises:
and outputting the second control signal when the charging temperature characterizes the short circuit of the charging interface.
Optionally, the detecting the charging temperature of the electronic device includes:
detecting a first temperature at the charging interface;
detecting a second temperature of the position of a central processing unit of the electronic equipment;
the method further comprises the following steps:
determining whether a temperature difference between the first temperature minus the second temperature is greater than a preset temperature difference;
and if the temperature difference obtained by subtracting the second temperature from the first temperature is greater than the preset temperature difference, determining that the charging temperature characterizes the short circuit of the charging interface.
According to a third aspect of the embodiments of the present disclosure, there is provided a protection device for a charging interface, which is applied to an electronic device, the device including:
a first determination module configured to determine a charging parameter of the electronic device;
the first output module is configured to output a first control signal when the charging parameter represents that the charging voltage is greater than a protection threshold value; the first control signal is used for indicating the switching element in the charging interface to be conducted and applying a clamping voltage within a preset range to the switching element;
the second output module is configured to output a second control signal when the charging parameter represents that the charging interface is short-circuited; the second control signal is used for indicating the switching element to be conducted and work in a preset state, and the impedance of the switching element is smaller than the preset impedance in the preset state.
Optionally, the charging parameters include: a charging voltage, the apparatus further comprising:
a first detection module configured to detect a charging voltage of the electronic device and determine whether the charging voltage is greater than the protection threshold.
Optionally, the charging parameters include: a charging temperature, the apparatus further comprising:
a second detection module configured to detect a charging temperature of the electronic device;
the second output module is specifically configured to output the second control signal when the charging temperature characterizes that the charging interface is short-circuited.
Optionally, the second detection module is specifically configured to detect a first temperature at the charging interface; detecting a second temperature of the position of a central processing unit of the electronic equipment;
the device further comprises:
a second determination module configured to determine whether a temperature difference between the first temperature minus the second temperature is greater than a preset temperature difference;
and the third determining module is configured to determine that the charging temperature characterizes the short circuit of the charging interface if the temperature difference obtained by subtracting the second temperature from the first temperature is greater than the preset temperature difference.
According to a fourth aspect of the embodiments of the present disclosure, there is provided a protection device of a charging interface, including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to: the executable instructions, when executed, implement the steps in the method according to the second aspect of the embodiments of the present disclosure.
According to a fifth aspect of the embodiments of the present disclosure, there is provided a non-transitory computer readable storage medium, wherein instructions, when executed by a processor of a mobile terminal, enable the mobile terminal to perform the steps of the method according to the second aspect of the embodiments of the present disclosure.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
in the embodiment of the disclosure, the charging circuit on which the charging interface is located has a switching element; the circuit of the charging interface is also provided with a detection module and a switch driving circuit connected with the detection module, and the switch driving circuit is connected with the controlled end of the switch element and used for controlling the switch element. The detection module is used for detecting the charging parameters of the charging interface, and when the charging parameters represent that the charging voltage of the charging circuit is greater than a protection threshold value, the switch driving circuit is controlled to output a first control signal to the controlled end, so that the switch element is switched on and works at a clamping voltage within a preset range, the charging voltage for charging is reduced, and the charging overvoltage protection effect is achieved. When the charging parameter represents the short circuit of the charging interface, the control switch driving circuit outputs a second control signal to the controlled end so as to enable the switch element to be switched on and work in a preset state, and the impedance of the switch element is smaller than the preset impedance in the preset state, so that the charging interface is in a short-circuit protection state.
Therefore, the switch driving circuit applies different control signals to the switch element to control the switch element to work in different states, so that the charging interface has functions of overvoltage protection and short-circuit protection, product cost can be saved, and safety performance is improved; on the other hand, the area of the cloth plate can be reduced, so that the size of the electronic equipment is reduced, and the use experience of a user is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a diagram of a charging interface device according to an embodiment of the disclosure.
Fig. 2 is a diagram illustrating an example of a circuit structure inside a charging interface protection chip according to an embodiment of the disclosure.
Fig. 3 is a circuit structure example diagram of a charging interface protection system in an embodiment of the disclosure.
Fig. 4 is a flowchart illustrating a protection method for a charging interface according to an embodiment of the disclosure.
Fig. 5 is a diagram illustrating a protection device for a charging interface according to an exemplary embodiment.
FIG. 6 is a block diagram illustrating an electronic device apparatus in accordance with an example embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Fig. 1 is a diagram of a charging interface device according to an embodiment of the present disclosure, and as shown in fig. 1, the charging interface 100 includes:
a charging circuit 101 having a switching element 101 a;
the detection module 102 is configured to detect a charging parameter of the charging interface;
the switch driving circuit 103 is connected to the detection module 102, connected to the controlled terminal of the switch element 101a, and configured to output a first control signal to the controlled terminal when the charging parameter indicates that the charging voltage of the charging circuit is greater than a protection threshold; when the charging parameters represent the short circuit of the charging interface, outputting a second control signal to the controlled end;
the switching element 101a is used for conducting under the action of the first control signal and applying a clamping voltage within a preset range to the charging circuit; and the switching element is conducted under the action of the second control signal and works in a preset state, and the impedance of the switching element is smaller than the preset impedance in the preset state.
In the embodiment of the present disclosure, the charging interface 100 refers to a charging interface of an electronic device, such as a Lightning (Lightning Dock interface), a Micro USB interface based on a Universal Serial Bus (USB), a C-type USB interface, and the like, where the electronic device includes a mobile phone, a tablet computer, an intelligent wearable device, and the like. The electronic equipment is connected with an external power supply through the charging interface to charge the battery of the electronic equipment, so that the cruising ability is met.
Charging interface 100 includes a charging circuit 101, and charging circuit 101 is a charging circuit connected to charging interface 100, and includes a switching element 101 a. The switching element 101a may be a Metal-Oxide-Semiconductor Field-Effect Transistor (Mosfet), a triode, or the like. One end of the switching element 101a is grounded via a ground line of an external power supply based on a charging circuit, and the other end is connected to a charging interface. When the electronic device is normally charged, the switching element 101a is in an off state.
In the embodiment of the present disclosure, a detection module 102 and a switch driving circuit 103 are further disposed on a line to which the charging interface 100 is connected, wherein the detection module 102 is connected to the switch driving circuit 103, and the switch driving circuit 103 is connected to a controlled end of the switch element 101 a. If the switching element 101a is a field effect transistor, the controlled terminal is the gate of the field effect transistor, the source of the field effect transistor is connected to the charging interface, and the drain is connected to ground.
In an embodiment of the disclosure, the detecting module 102 is configured to detect a charging parameter of the charging interface, where the charging parameter includes at least one of a charging voltage, a charging current, and a charging temperature. The detection module 102 determines whether the charging parameter satisfies a preset condition based on the detected charging parameter, and controls the switch driving circuit 103 to send a control signal to the switching element 101 a. Wherein, whether the charging parameter satisfies the preset condition includes at least one of the following:
whether the charging voltage is greater than a voltage protection threshold;
whether the charging current is greater than a current protection threshold;
whether the charging temperature exceeds a preset temperature threshold.
For example, when the detection module 102 determines that the charging voltage is greater than the voltage protection threshold according to the detected charging voltage, the switch driving circuit 103 is controlled to output a first control signal to the controlled terminal of the switching element 101 a; when the charging parameter detected by the detection module 102 represents a short circuit of the charging interface, the control switch driving circuit 103 outputs a second control signal to the controlled terminal of the switch element 101 a. The charging voltage is greater than the voltage protection threshold value and is possibly surge overvoltage caused by plugging and unplugging a charging interface or lightning stroke; the short circuit of the charging interface may be a micro short circuit (an object with several tens of ohms exists between the power supply and the ground) caused by, for example, a Pin of the USB interface being connected by mistake after foreign objects enter the charging interface. When the charging interface 100 has a micro short circuit, the detection module 102 may detect a large charging current or an excessively high charging temperature, and both the excessively high charging current and the excessively high charging temperature may cause the charging interface 100 to be burned.
In this regard, the detection module 102 of the present disclosure controls the switch driving circuit 103 to send a control signal to the switch element 101a according to the detected charging parameter, so as to control the switch element 101a to perform a corresponding operation. Specifically, the method comprises the following steps:
the switching element 101a is turned on in response to the received first control signal and applies a clamping voltage within a preset range to the charging circuit. Taking the example where the switching element 101a is a field effect transistor, the switch driving circuit 103 applies a high voltage to the gate of the field effect transistor by the first control signal, and the field effect transistor is turned on to clamp the voltage at a set value. In the embodiment of the present disclosure, the switching element 101a (e.g., a field effect transistor) that is turned on is connected to ground, and the voltage across the switching element 101a is a clamp voltage in a predetermined range, so as to reduce the charging voltage allocated to charging the electronic device, thereby performing a charging overvoltage protection function.
It should be noted that, when a clamp voltage in a predetermined range is applied to the two ends of the switching element 101a, the clamp voltage in the predetermined range may be determined in real time according to the currently detected charging voltage of the charging interface and the standard charging voltage allowed when the electronic device is charged; the voltage across the switching element 101a may be set to a predetermined range according to the range of the clamp voltage determined by experiment. A clamping voltage within a predetermined range for the purpose of causing the charging voltage of the electronic device to be not higher than a voltage protection threshold.
The switch element 101a is connected to ground in response to the received second control signal, and the impedance of the switch element 101a is smaller than the preset impedance, so that the charging current passing through the charging interface 100 is introduced to the ground through the switch element 101a, the electronic device is not charged, and the charging interface 100 is in a short-circuit protection state.
It should be noted that when the switching element 101a is turned on based on the second control signal, the impedance of the switching element 101a being smaller than the preset impedance may mean that the impedance of the switching element 101a is only the internal resistance of itself. Taking the example that the switching element 101a is a field effect transistor, the field effect transistor operates in a saturation region (a preset state) when being turned on based on the second control signal, and at this time, the on-resistance between the source and the drain of the field effect transistor is only the internal resistance of the field effect transistor itself, for example, the internal resistance is in milliohm, so as to play a role of short circuit protection.
It can be understood that, in the embodiment of the present disclosure, according to the charging parameter detected by the detection module 102, different control signals are applied to the switch element 101a through the switch driving circuit 103 to enable the switch element 101a to operate in different states, so that the charging interface 100 has both functions of overvoltage protection and short-circuit protection, which can save product cost and improve the safety of the electronic device; on the other hand, the area of the cloth plate can be reduced, so that the size of the electronic equipment is reduced, and the use experience of a user is improved.
In one embodiment, the charging parameters include: a charging voltage, the detecting module 102 includes: a voltage detection circuit 102 a;
the voltage detection circuit 102a connected in parallel to the switching element 101a and connected to the switch drive circuit 103; the protection circuit is used for detecting the charging voltage of the charging circuit 101 and controlling the switch driving circuit 103 to output the first control signal to the controlled end when the charging voltage is determined to be greater than the protection threshold.
In this embodiment, a voltage detection circuit 102a is connected in parallel with the switching element 101a for detecting the charging voltage of the charging circuit 101. When the detected charging voltage is greater than the protection threshold, the switch driving circuit 103 is controlled to output the first control signal to the controlled terminal of the switching element 101 a.
In this embodiment, the protection threshold, i.e., the voltage protection threshold as described above, is realized by the voltage detection circuit 102a, thereby enabling overvoltage protection using the switch drive circuit 103 and the switching element 101 a. In addition, it should be noted that the voltage detection circuit 102a may be designed in a conventional manner, and the disclosure is not limited thereto.
In one embodiment, the charging parameters include: the charging temperature, the detection module 102, further includes: a temperature detection assembly 102b and a processing module 102 c;
the temperature detecting component 102b is at least used for detecting the charging temperature of the charging circuit 101;
the processing module 102c is connected to the temperature detecting component 102b and the switch driving circuit 103, and is configured to receive the charging temperature, and control the switch driving circuit 103 to output the second control signal when the charging temperature characterizes a short circuit of the charging interface.
In this embodiment, the charging parameter further includes a charging temperature, and the detection module 102 further includes a temperature detection component 102b and a processing module 102 c. The temperature detection component 102b detects at least the charging temperature of the charging circuit 101, so that the processing module 102c connected to the temperature detection component 102b and the switch driving circuit 103 can receive the charging temperature, and controls the switch driving circuit 103 to output a second control signal when the charging interface is short-circuited at the charging temperature.
It should be noted that, in the embodiment of the present disclosure, the charging temperature characteristic charging interface short circuit may be that the charging temperature is greater than a preset temperature value. In the embodiment of the disclosure, the processing module 102c may be a central processing unit in an electronic device, or an application specific integrated chip.
Further, in embodiments of the present disclosure, the Temperature detection assembly may include a thermistor, such as a Negative Temperature CoeffiCient (NTC) thermistor or a Positive Temperature CoeffiCient (PTC) thermistor. Since the local temperature may not be the same when the electronic device is operating, the detected temperature may be different based on the different placement positions of the thermistors. For example, when the electronic device is charged, the temperature at the charging interface may be relatively high, and thus the present disclosure may dispose the thermistor near the charging interface when at least the charging temperature of the charging circuit 101 is detected by the temperature detection component.
In one embodiment, the processing module 102c comprises: a central processing unit;
the central processing unit is connected with the switch driving circuit 103 through a general purpose input/output (GPIO) pin.
It should be noted that, in the embodiment of the present disclosure, the processing module 102c may be a central processing unit. Generally, a central processing unit (cpu) has General-purpose input/output (GPIO) pins. The central processing unit can be connected with the switch driving circuit 103 through the GPIO pin to control the switch driving circuit 103 to output the second control signal. For example, when the central processing unit determines that the charging temperature characterizes the short circuit of the charging interface, the central processing unit controls the GPIO pin to output a high level, and the switch driving circuit 103 outputs a second control signal to the switch element 101a based on the received high level signal, so that the charging interface 100 is in a short-circuit protection state, and the possibility of over-temperature burning of the charging interface 100 is reduced.
It can be understood that, since a central processing unit of an electronic device (e.g., a mobile phone) generally has a GPIO pin, the present disclosure utilizes the existing GPIO pin to connect with the switch driving circuit 103, so that the control of the switch driving circuit 103 is more direct and efficient.
Fig. 2 is an exemplary diagram of a circuit structure inside a charging interface protection chip according to an embodiment of the disclosure, and as shown in fig. 2, the circuit includes a voltage detection circuit, a Mosfet driving circuit, and a Mosfet. In addition, the voltage detection circuit is connected with the Mosfet driving circuit, a GPIO control pin is also connected with the Mosfet driving circuit, and the Mosfet driving circuit is connected with the Mosfet. The Mosfet driving circuit is the switch driving circuit 103 of the present disclosure, the Mosfet is the switch element 101a of the present disclosure, and the GPIO control pin is a GPIO pin included in a central processing unit of the electronic device. The Mosfet driving circuit is used for applying a control signal to the Mosfet according to a signal of the voltage detection circuit or the GPIO control pin, so that the Mosfet works in a corresponding state, and the charging interface has functions of overvoltage protection and short-circuit protection.
In one embodiment, the temperature detecting assembly 102b includes:
a first subassembly 102b1, disposed adjacent to the charging interface 100, for detecting a first temperature at the charging interface 100;
a second subassembly 102b2, located on the same circuit board as the processing module 102c, for detecting a second temperature on the circuit board;
the processing module 102c is connected to the first sub-assembly 102b1 and the second sub-assembly 102b2, and configured to determine whether the temperature difference between the first temperature and the second temperature is greater than a preset temperature difference, and if the temperature difference between the first temperature and the second temperature is greater than the preset temperature difference, determine that the charging temperature characterizes a short circuit of the charging interface 100, and control the switch driving circuit 103 to output the second control signal.
In this embodiment, the temperature sensing assembly 102b includes a first subassembly 102b1 and a second subassembly 102b2, e.g., the first subassembly 102b1 and the second subassembly 102b2 are both NTC thermistors. The first sub-assembly 102b1, which is disposed adjacent to the charging interface 100, may detect a first temperature at the charging interface 100; the second subassembly 102b2, located on the same circuit board as the process module 102c, detects a second temperature on the circuit board.
And the processing module 102c is connected with the first sub-assembly 102b1 and the second sub-assembly 102b2 respectively, after the first temperature and the second temperature are obtained, according to whether the temperature difference between the first temperature and the second temperature is greater than a preset temperature difference, and when the temperature difference is greater than the preset temperature difference, the charging temperature is determined to characterize that the charging interface 100 is short-circuited, and the switch driving circuit 103 is controlled to output a second control signal.
It should be noted that, in the embodiment of the present disclosure, when the battery is charged by using the charging interface 100, the charging temperature of the charging interface 100 is relatively high, and therefore the first sub-assembly 102b1 is located near the charging interface 100, and can detect the first temperature (i.e. the charging temperature) of the electronic device under the common environment of operation and charging, and the detected first temperature is also relatively high; the second subassembly 102b2 is located on the same circuit board as the processing module 102c, which is responsive to a second temperature (less affected by charging) at which the electronic device is operating. Wherein the second temperature at which the electronic device operates may be related to a temperature environment in which the electronic device is located.
In contrast, according to the present disclosure, when determining whether the charging interface 100 is short-circuited, a dual-temperature detection unit (the first sub-assembly 102b1 and the second sub-assembly 102b2) is provided, and the first temperature is used to subtract the second temperature, so that the influence of the second temperature (such as the influence caused by the ambient temperature) when the electronic device itself works can be reduced, the temperature rise of the charging interface 100 due to charging can be more accurately determined, whether the charging interface is short-circuited can be determined, and the false triggering of the switch driving circuit 103 on the switch element 101a can be reduced. It can be understood that, in the above manner of the present disclosure, the control accuracy of the switching element 101a can be effectively improved.
It should be noted that, in the embodiment of the present disclosure, the second sub-assembly 102b2 may be located at a position with a lower temperature on the circuit board (e.g., a position away from the battery) to reduce the influence of heat generated by the battery during charging, so that the detection of the second temperature is more accurate, thereby further improving the accuracy of determining whether the charging interface 100 is short-circuited.
In addition, in the embodiment of the disclosure, the first sub-assembly 102b1 and the second sub-assembly 102b2 are NTC thermistors, and the processing module 102c is a central processing unit. Typically, an Analog-to-digital converter (ADC) is also built in the cpu, so that the cpu can sample from the first sub-assembly 102b1 and the second sub-assembly 102b2 by using the ADC and convert the sampled electric signals (Analog signals) representing the charging temperature into digital signals, so that the cpu determines whether the charging temperature represents a short circuit of the charging interface 100 according to the digital signals. It will be appreciated that the use of an existing ADC in the central processing unit also makes the solution simple and convenient to integrate.
Fig. 3 is a circuit structure example diagram of a charging interface protection system in an embodiment of the present disclosure, and as shown in fig. 3, the circuit includes the chip circuit shown in fig. 2, and further includes a temperature detection unit 1, a temperature detection unit 2, and a central processing unit. The central processing unit is internally provided with an ADC which is connected with a Mosfet driving circuit through a GPIO pin. The temperature detection unit 1 is a first sub-assembly 102b1 of the disclosed embodiment, as shown in fig. 3, located near the charging interface; in addition, the temperature detecting unit 2 is a second sub-assembly 102b2, which is located near the central processing unit, and the central processing unit may be located on the same circuit board. The central processing unit receives the charging temperature through the ADC, determines whether the charging temperature represents short circuit of a charging interface, and controls the Mosfet driving circuit to apply a second control signal to the Mosfet through the GPIO pin when the charging interface is short-circuited so as to realize short-circuit protection. In addition, the Mosfet driving circuit is further used for applying a first control signal to the Mosfet according to the condition that the voltage detection circuit detects that the charging voltage is greater than the protection threshold value, so that overvoltage protection is realized.
Fig. 4 is a flowchart of a protection method for a charging interface according to an embodiment of the present disclosure, and as shown in fig. 4, the method is applied to an electronic device including the charging interface provided in the embodiment of the present disclosure, and the protection method for the charging interface includes:
s11, determining the charging parameters of the electronic equipment;
s12a, outputting a first control signal when the charging parameter represents that the charging voltage is greater than a protection threshold value; the first control signal is used for indicating the switching element in the charging interface to be conducted and applying a clamping voltage within a preset range to the switching element;
s12b, outputting a second control signal when the charging parameter represents that the charging interface is short-circuited; the second control signal is used for indicating the switching element to be conducted and work in a preset state, and the impedance of the switching element is smaller than the preset impedance in the preset state.
In this embodiment, the electronic device may determine the charging parameter of the electronic device according to the detection module. The detection module, for example, includes: a voltage detection circuit, a current detection circuit, a temperature detection circuit, and the like.
When the charging parameter represents that the charging voltage of the electronic equipment is greater than the protection threshold value, a first control signal is output, so that a switch element in a charging interface is conducted and works at a clamping voltage within a preset range, and overvoltage protection is achieved.
And when the charging parameter represents the short circuit of the charging interface, outputting a second control signal to enable the switch element to be conducted and work in a preset state that the impedance is smaller than the preset impedance, thereby realizing short-circuit protection.
Therefore, the electronic equipment disclosed by the invention controls the switch element to work in different states through different control signals, so that the charging interface has functions of overvoltage protection and short-circuit protection, on one hand, the product cost can be saved, and the safety of the electronic equipment is improved; on the other hand, the area of the cloth plate can be reduced, so that the size of the electronic equipment is reduced, and the use experience of a user is improved.
In one embodiment, the charging parameters include: a charging voltage, the method further comprising:
detecting a charging voltage of the electronic device and determining whether the charging voltage is greater than the protection threshold.
In this embodiment, the charging voltage may be detected by the voltage detection circuit shown in fig. 2. When the voltage detection circuit determines that the charging voltage is larger than the protection threshold value, the switch driving circuit is controlled to output a first control signal to the switching element so as to realize overvoltage protection.
In one embodiment, the charging parameters include: a charging temperature, the method further comprising:
detecting a charging temperature of the electronic device;
the outputting a second control signal when the charging parameter represents that the charging interface is short-circuited comprises:
and outputting the second control signal when the charging temperature characterizes the short circuit of the charging interface.
In this embodiment, when it is determined that the charging parameter represents a short circuit of the charging interface, the determination may be based on the temperature detection component and the processing module. And when the processing module determines that the charging temperature represents the short circuit of the charging interface according to the charging temperature detected by the temperature detection assembly, the processing module controls the switch driving circuit to output a second control signal to the switch element so as to realize short-circuit protection.
In one embodiment, the detecting the charging temperature of the electronic device includes: detecting a first temperature at the charging interface;
detecting a second temperature of the position of a central processing unit of the electronic equipment;
the method further comprises the following steps:
determining whether a temperature difference between the first temperature minus the second temperature is greater than a preset temperature difference;
and if the temperature difference obtained by subtracting the second temperature from the first temperature is greater than the preset temperature difference, determining that the charging temperature characterizes the short circuit of the charging interface.
In this embodiment, when determining whether charging interface 100 is short-circuited, a dual temperature detection unit (first sub-assembly 102b1 and second sub-assembly 102b2) is provided, and the influence of the second temperature (e.g., influence caused by ambient temperature) when the electronic device itself operates can be reduced by subtracting the second temperature from the first temperature, so that whether the charging interface is short-circuited can be determined more accurately. It can be understood that, the above manner of the present disclosure can effectively improve the control precision of the switching element.
In addition, in the embodiment of the present disclosure, the second sub-assembly 102b2 may be located at a position with a lower temperature (e.g., a position away from the battery) on the circuit board to reduce the influence of heat generated by the battery during charging, so that the detection of the second temperature is more accurate, thereby further improving the accuracy of determining whether the charging interface 100 is short-circuited.
Fig. 5 is a diagram illustrating a protection device for a charging interface according to an exemplary embodiment. Applied to an electronic device, referring to fig. 5, the information control apparatus includes:
a first determining module 201 configured to determine a charging parameter of the electronic device;
a first output module 202 configured to output a first control signal when the charging parameter indicates that the charging voltage is greater than a protection threshold; the first control signal is used for indicating the switching element in the charging interface to be conducted and applying a clamping voltage within a preset range to the switching element;
the second output module 203 is configured to output a second control signal when the charging parameter represents that the charging interface is short-circuited; the second control signal is used for indicating the switching element to be conducted and work in a preset state, and the impedance of the switching element is smaller than the preset impedance in the preset state.
Optionally, the charging parameters include: a charging voltage, the apparatus further comprising:
a first detection module 204 configured to detect a charging voltage of the electronic device and determine whether the charging voltage is greater than the protection threshold.
Optionally, the charging parameters include: a charging temperature, the apparatus further comprising:
a second detection module 205 configured to detect a charging temperature of the electronic device;
the second output module 203 is specifically configured to output the second control signal when the charging temperature characterizes that the charging interface is short-circuited.
Optionally, the second detecting module 205 is specifically configured to detect a first temperature at the charging interface; detecting a second temperature of the position of a central processing unit of the electronic equipment;
the device further comprises:
a second determination module 206 configured to determine whether a temperature difference between the first temperature minus the second temperature is greater than a preset temperature difference;
a third determining module 207, configured to determine that the charging temperature characterizes the short circuit of the charging interface if the temperature difference obtained by subtracting the second temperature from the first temperature is greater than the preset temperature difference. With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 6 is a block diagram illustrating an electronic device apparatus 800 in accordance with an example embodiment. For example, the device 800 may be a mobile phone, a mobile computer, etc.
Referring to fig. 6, the apparatus 800 may include one or more of the following components: processing component 802, memory 804, power component 806, multimedia component 808, audio component 810, input/output (I/O) interface 812, sensor component 814, and communication component 816.
The processing component 802 generally controls overall operation of the device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.
The memory 804 is configured to store various types of data to support operation at the device 800. Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The multimedia component 808 includes a screen that provides an output interface between the device 800 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the device 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the apparatus 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.
The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for the device 800. For example, the sensor assembly 814 may detect the open/closed state of the device 800, the relative positioning of the components, such as a display and keypad of the apparatus 800, the sensor assembly 814 may also detect a change in position of the apparatus 800 or a component of the apparatus 800, the presence or absence of user contact with the apparatus 800, orientation or acceleration/deceleration of the apparatus 800, and a change in temperature of the apparatus 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 816 is configured to facilitate communications between the apparatus 800 and other devices in a wired or wireless manner. The device 800 may access a wireless network based on a communication standard, such as Wi-Fi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.
In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 804 comprising instructions, executable by the processor 820 of the device 800 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (12)
1. A charging interface, comprising:
a charging circuit having a switching element;
the detection module is used for detecting the charging parameters of the charging interface;
the switch driving circuit is connected with the detection module, connected with the controlled end of the switch element and used for outputting a first control signal to the controlled end when the charging parameter represents that the charging voltage of the charging circuit is greater than a protection threshold value; when the charging parameters represent the short circuit of the charging interface, outputting a second control signal to the controlled end;
the switching element is used for conducting under the action of the first control signal and applying a clamping voltage within a preset range to the charging circuit; and the switching element is conducted under the action of the second control signal and works in a preset state, and the impedance of the switching element is smaller than the preset impedance in the preset state.
2. The charging interface of claim 1, wherein the charging parameters comprise: charging voltage, the detection module includes: a voltage detection circuit;
the voltage detection circuit is connected with the switch element in parallel and is connected with the switch driving circuit; the control circuit is used for detecting the charging voltage of the charging circuit and controlling the switch driving circuit to output the first control signal to the controlled end when the charging voltage is determined to be larger than the protection threshold value.
3. The charging interface according to claim 1 or 2, wherein the charging parameters comprise: the charging temperature, detect the module, still include: the temperature detection assembly and the processing module;
the temperature detection component is at least used for detecting the charging temperature of the charging circuit;
the processing module is respectively connected with the temperature detection assembly and the switch driving circuit and used for receiving the charging temperature and controlling the switch driving circuit to output the second control signal when the charging temperature characterizes the short circuit of the charging interface.
4. The charging interface of claim 3, wherein the temperature sensing assembly comprises:
a first subassembly, disposed adjacent to the charging interface, for detecting a first temperature at the charging interface;
the second subassembly is positioned on the same circuit board with the processing module and is used for detecting a second temperature on the circuit board;
the processing module is respectively connected with the first subassembly and the second subassembly and used for determining whether the temperature difference between the first temperature and the second temperature is greater than a preset temperature difference or not, if the temperature difference between the first temperature and the second temperature is greater than the preset temperature difference, the charging temperature is determined to characterize the short circuit of the charging interface, and the switch driving circuit is controlled to output the second control signal.
5. The charging interface of claim 3, wherein the processing module comprises: a central processing unit;
and the central processing unit is connected with the switch driving circuit through a general purpose input/output (GPIO) pin.
6. A protection method of a charging interface is applied to electronic equipment, and the method comprises the following steps:
determining a charging parameter of the electronic device;
when the charging parameter represents that the charging voltage is greater than the protection threshold value, outputting a first control signal; the first control signal is used for indicating the switching element in the charging interface to be conducted and applying a clamping voltage within a preset range to the switching element;
when the charging parameters represent the short circuit of the charging interface, outputting a second control signal; the second control signal is used for indicating the switching element to be conducted and work in a preset state, and the impedance of the switching element is smaller than the preset impedance in the preset state.
7. The method of claim 6, wherein the charging parameters comprise: a charging voltage, the method further comprising:
detecting a charging voltage of the electronic device and determining whether the charging voltage is greater than the protection threshold.
8. The method of claim 6 or 7, wherein the charging parameters comprise: a charging temperature, the method further comprising:
detecting a charging temperature of the electronic device;
the outputting a second control signal when the charging parameter represents that the charging interface is short-circuited comprises:
and outputting the second control signal when the charging temperature characterizes the short circuit of the charging interface.
9. The method of claim 8, wherein the detecting the charging temperature of the electronic device comprises:
detecting a first temperature at the charging interface;
detecting a second temperature of the position of a central processing unit of the electronic equipment;
the method further comprises the following steps:
determining whether a temperature difference between the first temperature minus the second temperature is greater than a preset temperature difference;
and if the temperature difference obtained by subtracting the second temperature from the first temperature is greater than the preset temperature difference, determining that the charging temperature characterizes the short circuit of the charging interface.
10. A protection device of a charging interface is applied to electronic equipment, and the protection device comprises:
a first determination module configured to determine a charging parameter of the electronic device;
the first output module is configured to output a first control signal when the charging parameter represents that the charging voltage is greater than a protection threshold value; the first control signal is used for indicating the switching element in the charging interface to be conducted and applying a clamping voltage within a preset range to the switching element;
the second output module is configured to output a second control signal when the charging parameter represents that the charging interface is short-circuited; the second control signal is used for indicating the switching element to be conducted and work in a preset state, and the impedance of the switching element is smaller than the preset impedance in the preset state.
11. A protection device of a charging interface is characterized by comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to: the executable instructions, when executed, implement the steps in the method of any one of claims 6 to 9.
12. A non-transitory computer readable storage medium having instructions which, when executed by a processor of an electronic device, enable the electronic device to perform the steps of the method of any of claims 6 to 9.
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