CN109378878B - Charging circuit, charging processing method, electronic device, and storage medium - Google Patents
Charging circuit, charging processing method, electronic device, and storage medium Download PDFInfo
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- CN109378878B CN109378878B CN201811348648.2A CN201811348648A CN109378878B CN 109378878 B CN109378878 B CN 109378878B CN 201811348648 A CN201811348648 A CN 201811348648A CN 109378878 B CN109378878 B CN 109378878B
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
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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
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- 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
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Abstract
The embodiment of the application provides a charging circuit, a charging processing method, electronic equipment and a storage medium. The charging interface is used for connecting an external charging device; the first switch tube comprises an input end, an output end and a control end, wherein the input end is connected with the charging interface, and the output end is grounded; the temperature detection element acquires first temperature information of the charging interface; the control chip is connected with the temperature detection element and acquires the first temperature information, the control chip is connected with the control end of the first switch tube, and when the first temperature information is larger than a safe temperature threshold value, the control chip controls the control end to conduct the input end and the output end so as to stop charging through the charging interface. The charging interface is prevented from being burnt out.
Description
Technical Field
The present disclosure relates to the field of electronic technologies, and in particular, to a charging circuit, a charging processing method, an electronic device, and a storage medium.
Background
At present, a charging interface of an electronic device such as a mobile phone can integrate data transmission and charging functions. When the electronic equipment is connected with an external charging device through the charging interface for charging, because the distance between pins of the charging interface is small, when foreign matters or liquid enters the charging interface, micro short circuit is easily caused.
Disclosure of Invention
The embodiment of the application provides an electronic device, which can effectively and accurately detect whether a charging interface is short-circuited or not and protect the charging interface.
The embodiment of the application provides a charging circuit, it includes:
the charging interface is used for connecting an external charging device;
the first switch tube comprises an input end, an output end and a control end, the input end is connected with the charging interface, and the output end is grounded;
the temperature detection element acquires first temperature information of the charging interface;
the control chip is connected with the temperature detection element and acquires the first temperature information, the control chip is connected with the control end of the first switch tube, and when the first temperature information is larger than a safe temperature threshold value, the control chip controls the control end to conduct the input end and the output end so as to stop charging through the charging interface.
The embodiment of the application also provides a charging processing method, which is applied to equipment to be charged, wherein the equipment to be charged comprises a charging interface and a first switch tube, the input end of the first switch tube is connected with the charging interface, and the output end of the first switch tube is grounded; the method comprises the following steps:
when charging is carried out through the charging interface, first temperature information of the charging interface is acquired;
when the first temperature information exceeds a safe temperature threshold value, the control end of the first switch tube is controlled to conduct the input end and the output end so as to stop charging through the charging interface.
The embodiment of the application also provides an electronic device, which comprises a charging circuit and a battery, wherein the charging circuit is connected with the battery, and the charging circuit is as described above.
Embodiments of the present application also provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the charging processing method as described above.
The charging circuit, the charging processing method, the electronic device and the storage medium provided by the embodiment of the application can judge whether the charging interface is slightly short-circuited according to the temperature of the charging interface, when the charging interface has foreign matters or enters liquid, the micro short-circuit can be caused, so that the temperature of the charging interface rises, and when the temperature of the charging interface exceeds a safe temperature threshold value, the charging interface is grounded to stop charging through the charging interface, so that the charging interface is prevented from being burnt out.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural diagram of a first state of an electronic device according to an embodiment of the present application.
Fig. 2 is another schematic structural diagram of the first state of the electronic device according to the embodiment of the present application.
Fig. 3 is a schematic structural diagram of a second state of an electronic device according to an embodiment of the present application.
Fig. 4 is another schematic structural diagram of a second state of the electronic device according to the embodiment of the present application.
Fig. 5 is a schematic structural diagram of a device to be charged and a charging apparatus according to an embodiment of the present disclosure.
Fig. 6 is another schematic structural diagram of a device to be charged and a charging apparatus according to an embodiment of the present disclosure.
Fig. 7 is a schematic structural diagram of a charging interface and a temperature detection element of a device to be charged according to an embodiment of the present disclosure.
Fig. 8 is a schematic structural diagram of a control chip and a temperature detection element of a device to be charged according to an embodiment of the present application.
Fig. 9 is a schematic flowchart of a charging processing method according to an embodiment of the present application.
Fig. 10 is a block diagram schematically illustrating an electronic device according to an embodiment of the present application.
Detailed Description
Referring to the drawings, wherein like reference numbers refer to like elements, the principles of the present application are illustrated as being implemented in a suitable computing environment. The following description is based on illustrated embodiments of the application and should not be taken as limiting the application with respect to other embodiments that are not detailed herein.
The embodiment of the application provides a charging circuit, a charging processing method, an electronic device and a storage medium. The details will be described below separately. The electronic device may be a smart phone, a tablet computer, or other devices, and may also be a game device, an AR (Augmented Reality) device, an audio playing device, a video playing device, or other devices.
Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of a first state of an electronic device according to an embodiment of the present disclosure, fig. 2 is another schematic structural diagram of the first state of the electronic device according to the embodiment of the present disclosure, fig. 3 is a schematic structural diagram of a second state of the electronic device according to the embodiment of the present disclosure, and fig. 4 is another schematic structural diagram of the second state of the electronic device according to the embodiment of the present disclosure. The first state may be a state in which the electronic device 100 does not turn on the camera function, such as a standby state and a state in which the camera is not turned on when the screen is bright. The second state is a state when the electronic device 100 turns on the image capturing function.
In some embodiments, the electronic device 100 may include a display 12, an electronics board 13, a battery 14, a housing 15, a front-facing camera 161, and a rear-facing camera 162. Note that the electronic apparatus 100 is not limited to the above.
In some embodiments, the electronic device 100 may further include a sliding device coupled to the housing 15, the sliding device being slidable relative to the housing. The front camera 161 and the rear camera 162 are provided on the slide device, and are located on opposite sides, respectively.
When the electronic device 100 is in the first state, the sliding mechanism 18 is in the initial state, i.e., the sliding mechanism 18 is located in the housing.
When the electronic device 100 is in the second state, i.e. when the camera function is turned on, the sliding mechanism 18 slides out of the housing 15, and the front camera 161 and the rear camera 162 are disposed on the sliding mechanism 18. When the sliding mechanism 18 does not slide out of the casing 15, the front camera 161 and the rear camera 162 are hidden in the casing, and when the electronic device 100 is in the second state, the sliding mechanism 18 slides out of the casing 15, so that photographing, shooting and the like can be performed by using the front camera 161 and the rear camera 162.
Wherein the display screen 12 is mounted in the housing 15. The display 12 is electrically connected to the electronic circuit board 13 to form a display surface of the electronic apparatus 100. The display 12 may be in a regular shape, such as a rectangular parallelepiped structure, and the display 12 may cover the entire display surface of the electronic device 100, that is, a full screen display of the electronic device 100 is realized.
In some embodiments, the Display 12 may be a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) Display.
The electronic circuit board 13 is mounted in the housing 15, the electronic circuit board 13 may be a main board of the electronic device 100, and one, two or more functional components of a motor, a microphone, a speaker, an earphone interface, a universal serial bus interface, a front camera 161, a rear camera 162, a receiver 171, a distance sensor, an ambient light sensor, a processor, and the like may be integrated on the electronic circuit board 13. It is noted that, in the description of the present application, "a plurality" means two or more unless specifically defined otherwise.
In some embodiments, the electronic circuit board 13 may be screwed into the housing 15 by screws, or may be snap-fit into the housing 15. It should be noted that the way of specifically fixing the electronic circuit board 13 in the housing 15 according to the embodiment of the present application is not limited to this, and other ways, such as a way of fixing by a snap and a screw together, are also possible.
The electronic device 100 may further include a cover plate mounted to the display 12 to cover the display 12. The cover may be a clear glass cover so that the display 12 is transparent to the cover for display. In some embodiments, the cover plate may be a glass cover plate made of a material such as sapphire.
Wherein the housing 15 may form an outer contour of the electronic device 100. In some embodiments, the housing 15 may be a metal housing component, such as a metal such as magnesium alloy, stainless steel, and the like. It should be noted that the material of the housing 15 in the embodiment of the present application is not limited to this, for example: the housing 15 may be a plastic housing, a ceramic housing, a glass housing, or the like.
The electronic device of the present application may have only the first state, that is, the electronic device does not have a sliding device, and the electronic device may have a non-display area, and the front camera 161, the receiver 171, the distance sensor, the ambient light sensor, and the like may be provided in the non-display area.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a device to be charged and a charging apparatus according to an embodiment of the present disclosure. The device to be charged 300 includes a charging circuit including a charging interface 310, a first switch tube 360, a temperature detection element 350, and a control chip 340. The device to be charged 300 may be an electronic device in the above-described embodiment.
The charging interface 310 is used to connect the external charging device 200 to the charging cable 210. The charging interface 310 may be a Universal Serial Bus (USB) interface. Specifically, the charging interface 310 may be a Micro USB interface or a Type-C interface, and of course, the charging interface 310 may also be other interfaces. The charging interface 310 is connected to the external charging device 200 through a charging cable line, and obtains power from the external charging device 200. The external charging device 200 may be an adapter or the like.
The first switch tube 360 includes an input terminal 361, an output terminal 362 and a control terminal 363, the input terminal 361 is connected to the charging interface 310, and the output terminal 362 is grounded. The control terminal 363 can control the connection or disconnection between the input terminal 361 and the output terminal 362, so as to realize the connection or disconnection between the charging interface 310 and the ground. Charging interface 310 includes a plurality of pins including power pin VBUS. The connection between the charging interface 310 and the ground may be realized by that the power pin VBUS of the charging interface 310 is connected to the ground, and the power pin VBUS of the charging interface 310 is connected to the power pin of the external charging device 200, that is, the power pin is used to obtain the electric energy of the external charging device 200. The first switch tube 360 may be a triode, a field effect transistor, or a controllable switch.
In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The temperature detection element 350 acquires first temperature information of the charging interface 310. The temperature detecting element 350 may be a negative temperature coefficient resistor, a single thermistor, a temperature sensor, or the like. The temperature detection element 350 may acquire the first temperature information of the charging interface 310 in real time. For example, the charging interface 310 is a Type-C interface, and the temperature detection element 350 acquires first temperature information of the Type-C interface in real time. Because the pin of Type-C interface is more, and the width of Type-C interface is limited, consequently the interval between Type-C interface pin is less, when advancing liquid or dirty, causes little short circuit easily to lead to the temperature rise at Type-C interface. The temperature detection element 350 may change a corresponding resistance value according to a temperature change of the charging interface 310, so as to obtain the first temperature information of the current charging interface 310 according to the change of the resistance value of the temperature detection element 350.
The control chip 340 is connected to the temperature detecting element 350 and obtains the first temperature information, a General Purpose Input/Output (GPIO) pin of the control chip 340 is connected to the control terminal 363 of the first switch tube 360, and when the first temperature information is greater than the safety temperature threshold, the control chip 340 controls the control terminal 363 to connect the Input terminal 361 and the Output terminal 362, so as to stop charging through the charging interface 310.
When the device 300 to be charged is charged with the external charging device 200 through the charging interface 310, whether the charging interface 310 has a micro short circuit or not can be determined according to the temperature of the charging interface 310, and when the charging interface 310 has foreign matters or enters liquid, the micro short circuit can be caused, so that the temperature at the charging interface 310 is increased. When the temperature at the charging interface 310 exceeds the safe temperature threshold, the charging interface 310 is grounded, that is, the power pin of the charging interface 310 is grounded, so that the power pin of the external charging device 200 is grounded, the charging of the device 300 to be charged through the charging interface 310 is stopped, and the charging interface 310 and the device 300 to be charged are prevented from being burnt.
An analog-to-digital conversion (AC-DC) module is disposed in the charging device 200, and is used for converting an alternating current (for example, 220V alternating current) of a commercial power into a direct current (for example, 5V direct current) for charging the device 300 to be charged.
Referring to fig. 6, fig. 6 is another schematic structural diagram of a device to be charged and a charging apparatus according to an embodiment of the present disclosure. The device to be charged 300 further includes a battery management circuit 342 and a battery 330. The battery management circuit 342 may have a DC-DC voltage conversion module therein, and the battery management circuit 342 may adjust the voltage and/or current output to the battery 330 according to the needs of the battery 330. The battery management circuit 342 may be a battery management chip. The battery management chip and the control chip 340 may be two independent components, may also be the same component, may also be different modules in the same component, and the battery management circuit 342 may also be a partial circuit within the control chip 340.
In some embodiments, a resistor R1 may be connected in series with the charging cable 210 between the VBUS line and the CC line to indicate that an external charging device (e.g., a power adapter) is the source device. A resistor R1 may also be connected in series between the VOUT pin and the CC pin of the external charging device 200 to indicate that the external charging device (e.g., a power adapter) is a source device. A battery protection board may be disposed in the battery 330 of the device 300 to be charged, and the battery protection board may implement functions such as short circuit and overcurrent protection.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a charging interface and a temperature detection element of a device to be charged according to an embodiment of the present disclosure. The temperature detection element 350 is adjacent to the charging interface 310. The temperature detection element 350 and the charging interface 310 may be disposed in the same region, and the temperature detection element and the charging interface 310 are not directly connected, but are close to each other in distance, so that the first temperature information of the charging interface 310 can be timely and accurately acquired. A pin diagram of the charging interface 310 is shown. The Temperature detecting element 350 may be a Negative Temperature Coefficient thermistor, wherein a Negative Temperature Coefficient thermistor (NTC) is a material having a Negative Temperature Coefficient thermistor phenomenon in which resistance decreases exponentially with a Temperature rise. In some embodiments, the temperature sensing element 350 is attached to the charging interface 310. The temperature detecting element 350 may be directly connected to the charging interface 310 or connected to the charging interface 310 through a heat conducting element (e.g., a heat conducting fin), so as to timely and accurately obtain the first temperature information of the charging interface 310. Temperature detection element 350 may be disposed in charging interface 310, or may be disposed on the outer surface of the housing of charging interface 310.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a control chip and a temperature detection element of a device to be charged according to an embodiment of the present disclosure. The number of the temperature detecting elements 350 is at least 2, and each temperature detecting element 350 is connected to one detecting pin of the control chip 340.
Each temperature detection element 350 can operate independently and acquire first temperature information of the charging interface 310, respectively. Each of the temperature detecting elements 350 is connected to a detecting pin of the control chip 340, so that the control chip 340 can obtain at least 2 pieces of first temperature information, and then stop charging when any one piece of first temperature information exceeds a safe temperature threshold. Alternatively, when the at least one piece of first temperature information exceeds the safe temperature threshold, and the at least one piece of first temperature information does not exceed the safe temperature threshold, but the difference from the safe temperature threshold is small (for example, less than 10 degrees celsius or less than 5 degrees celsius), the charging is stopped. To prevent malfunction due to damage to the single temperature sensing element 350. The safe temperature threshold may be a default value, such as 50 degrees celsius, 60 degrees celsius, 70 degrees celsius, or the like.
One end of the temperature detection element 350 is connected to the detection pin of the control chip 340 and to the power supply VDD through the first resistor R2 or R3, and the other end of the temperature detection element 350 is grounded. Temperature sensing element 350 may be a temperature sensitive resistor RT1 or RT 2.
The power supply VDD may be a power supply raised inside the device 300 to be charged, such as 5V. It should be noted that the detection pin of the control chip 340 may be an Analog-to-Digital Converter (ADC) pin.
In some embodiments, the control chip 340 obtains the charging information of the external charging device 200 through the charging interface 310, selects one of the first charging power and the second charging power as the target charging power according to the charging information, and the control chip 340 sends the control information to the external charging device 200 according to the target charging power for controlling the external charging device 200 to perform charging according to the target charging power, wherein the first charging power is greater than the second charging power.
The device to be charged 300 supports both the normal charging mode and the fast charging mode, and the external charging apparatus 200 may also support both the normal charging mode and the fast charging mode. The external charging device 200 in the fast charging mode provides higher charging power, e.g., may provide higher voltage and/or current than normal charging. In the fast charging mode, the external charging device 200 provides the electric energy of the first charging power to the device 300 to be charged, and in the normal charging mode, the external charging device 200 provides the electric energy of the second charging power to the device 300 to be charged, and the second charging power is smaller than the first charging power. For example, in the normal charging mode, a charging current of 5V, 1A, and a charging power of 5W is supplied. In the fast charge mode, a charge current of 9V, 2A and 18W of charge power is supplied, or a charge current of 5V, 3A and 15W of charge power may be supplied. In the fast charging mode, the charging power can be increased only by increasing the voltage, only by increasing the current, by increasing the voltage and the current at the same time, and the increased charging power can reach 50W at most, or even higher.
The device 300 to be charged can be charged with the external charging apparatus 200 through the charging interface 310, and can also communicate through the communication pins (D +, D-) of the charging interface 310. The control chip 340 may obtain charging information of the external charging device 200 through the charging interface 310, and then obtain whether the external charging device 200 supports fast charging according to the charging information, and if the external charging device 200 supports fast charging, select the first charging power as the target charging power from the first charging power and the second charging power. If the external charging device 200 does not support the fast charging, the second charging power may be selected as the target charging power from the first charging power and the second charging power. After determining the target charging power, the control chip 340 generates control information according to the target charging power, and sends the control information to the external charging device 200, where the control information is used to control the external charging device 200 to perform charging according to the target charging power. That is, the control chip 340 controls the external charging device 200 to select the fast charging mode or the normal charging mode according to the communication content with the external charging device 200.
It should be noted that, in the fast charging mode, the external charging device 200 may obtain information about the state of the battery 330, such as the remaining capacity, the battery voltage, the battery conductance, and the like, and the external charging device 200 adjusts the output voltage and/or the output current according to the state of the battery 330. For example, the external charging device 200 outputs different output voltages and/or output currents in the trickle state, the constant current state, or the constant voltage state. In the normal charging mode, the battery management circuit 342 in the device to be charged 300 can change the voltage and current input by the external charging apparatus 200 to meet the requirements of the battery 330.
In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features.
Referring to fig. 6, in some embodiments, when the target charging power is the first charging power, the other end of the charging interface 310 is used to connect to the battery 330 directly or through the second switch 344; when the target charging power is the second charging power, the other end of the charging interface 310 is connected to the battery 330 through the battery management circuit 342.
When the external charging device 200 and the device 300 to be charged are in the normal charging mode, i.e. when the target charging power is the second charging power, the other end of the charging interface 310 is connected to the battery 330 through the battery management circuit 342. The battery management circuit 342 comprises a protection circuit, and can directly short-circuit the VBUS of the power pin of the Type-C interface to ground, stop charging and realize temperature reduction of the Type-C interface.
When the external charging device 200 and the device 300 to be charged are in the fast charging mode, i.e. when the target charging power is the first charging power, one end of the charging interface 310 is connected to the external charging device 200, and the other end of the charging interface 310 is used for being directly connected to or connected to the battery 330 through the second switch tube 344. The electric energy of the external charging device 200 directly charges the battery 330 of the device 300 to be charged, so that high-power quick charging can be realized. Meanwhile, the battery management circuit 342 is not arranged between the external charging device 200 and the battery 330 of the device 300 to be charged, when the charging interface 310 is provided with foreign matters or liquid inlet at the Type-C interface, a short circuit can occur between pins at the Type-C interface, because the pins of the charging interface 310 are directly electrically connected with the battery 330 in the direct charging mode, the battery management circuit 342 is not arranged between the charging interface 310 and the battery 330 for protection, and the short circuit at the Type-C interface can cause overlarge current in a short time and easily burn the Type-C interface and the device 300 to be charged. If the first temperature information of the Type-C interface exceeds a safe temperature threshold (such as 60 ℃), the Type-C interface and the battery 330 are disconnected and quit quick charging, then the power supply pin VBUS of the Type-C interface is grounded and short-circuited, charging is stopped, and temperature reduction of the Type-C interface is achieved. Therefore, the problem that the power supply pin of the battery is also grounded and short-circuited to cause the overall power failure of the system of the device 300 to be charged due to the fact that the power supply pin VBUS of the Type-C interface is grounded and short-circuited in the quick charging mode can be solved.
In some embodiments, the charging circuit further comprises a second temperature detection element for detecting the temperature inside the device to be charged 300. For example, the second temperature detection element may be used to detect the temperature of the battery of the device 300 to be charged, to detect the temperature of the main chip, to detect the temperature of the memory, etc., and may also be used to detect the temperatures of a plurality of locations inside the device 300 to be charged, and then determine the safe temperature threshold according to the temperature inside the device 300 to be charged. A higher safe temperature threshold (e.g., 70 degrees celsius) is set when the temperature inside the device to be charged 300 is higher, and a lower safe temperature threshold (e.g., degrees celsius) is set when the temperature inside the device to be charged 300 is lower. The influence of the internal temperature of the device to be charged 300 on the first temperature information of the charging interface 310 can be neutralized. Among them, the second temperature detecting element may be one, two or more. If the number of the second temperature detection elements is two or more, the average value of the temperatures obtained by the plurality of second temperature detection elements may be obtained, and then the safety temperature threshold value may be set according to the average value. The weight value may also be set according to the distance between the second temperature detection element and the charging interface 310, the closer the distance to the charging interface 310, the larger the weight value is, and then the average value is obtained by multiplying the temperature obtained by each second temperature detection element by the weight value.
Referring to fig. 9, fig. 9 is a schematic flowchart illustrating a charging processing method according to an embodiment of the present disclosure. The charging processing method is applied to the equipment to be charged, the equipment to be charged comprises a charging interface and a first switch tube, the input end of the first switch tube is connected with the charging interface, and the output end of the first switch tube is grounded. The device to be charged can be referred to any one of the above embodiments. The charging processing method may specifically include:
101, when charging is carried out through a charging interface, first temperature information of the electrical interface is acquired.
The charging interface is used for connecting an external charging device. The charging interface may be a Universal Serial Bus (USB) interface. Specifically, the interface that charges can be Micro USB interface or Type-C interface etc. certainly, the interface that charges also can be other interfaces. The charging interface is connected with an external charging device through a charging cable, and obtains electric energy from the external charging device. The external charging device may be an adapter or the like.
The first switch tube comprises an input end, an output end and a control end, the input end is connected with the charging interface, and the output end is grounded. The control end can control the input end and the output end to be connected or disconnected, and therefore the charging interface and the ground are connected or disconnected. The charging interface comprises a plurality of pins, wherein the pins comprise a power pin, and the connection between the charging interface and the ground can be understood as the connection between the power pin of the charging interface and the ground, and the power pin of the charging interface is connected with the power pin of the external charging device, namely, the electric energy of the external charging device is obtained through the power pin. The first switch tube may be a triode, a field effect transistor, or a controllable switch.
The device to be charged can further comprise a temperature detection element, and first temperature information of the charging interface is acquired through the temperature detection element. The temperature detecting element can be a negative temperature coefficient resistor, a single thermistor, a temperature sensor and other elements. The temperature detection element can acquire first temperature information of the charging interface in real time. For example, the charging interface is a Type-C interface, and the temperature detection element acquires first temperature information of the Type-C interface in real time. Because the pin of Type-C interface is more, and the width of Type-C interface is limited, consequently the interval between Type-C interface pin is less, when advancing liquid or dirty, causes little short circuit easily to lead to the temperature rise at Type-C interface.
102, when the first temperature information exceeds the safe temperature threshold, controlling the control end of the first switch tube to conduct the input end and the output end so as to stop charging through the charging interface.
The device to be charged further comprises a control chip, the control chip is connected with the temperature detection element and obtains first temperature information, and the control chip is connected with the control end of the first switch tube. When the equipment to be charged is charged through the charging interface and the external charging device, whether the charging interface has a micro short circuit or not can be judged according to the temperature of the charging interface, and the micro short circuit can be caused when the charging interface has foreign matters or liquid, so that the temperature of the charging interface rises. When the temperature at the interface that charges surpasss the safe temperature threshold value, control chip control end switches on input and output to the interface ground connection that will charge, the power pin ground connection that will charge the interface soon, thereby make outside charging device's power pin ground connection, charge through the interface that charges with the equipment that stops waiting to charge, prevent to burn out the interface that charges and wait to charge equipment.
In some embodiments, the charging interface is configured to perform charging through a first charging power or a second charging power, the first charging power is greater than the second charging power, and when the first temperature information exceeds the safety temperature threshold, the control terminal of the first switch tube is controlled to connect the input terminal and the output terminal, so as to stop the charging through the charging interface specifically includes:
when the first temperature information exceeds the safety temperature threshold value and the charging interface is charged through the first charging power, disconnecting a circuit between the charging interface and the battery; and then the control end of the first switch tube is controlled to conduct the input end and the output end so as to stop charging through the charging interface.
The device to be charged can support two modes of ordinary charging and quick charging, and the external charging device can also support two modes of ordinary charging and quick charging. When the external charging device and the equipment to be charged are in a quick charging mode, namely the charging interface is charged through first charging power, one end of the charging interface is connected with the external charging device, and the other end of the charging interface is used for being directly connected or connected with a battery through a second switch tube. The battery of the equipment to be charged is directly charged by the electric energy of the external charging device, so that high-power quick charging can be realized. Meanwhile, a battery management circuit is not arranged between the external charging device and the battery of the equipment to be charged, when the charging interface is provided with foreign matters or liquid inlet as the Type-C interface, short circuit can occur between pins at the Type-C interface, because under the direct charging mode, the pins of the charging interface are directly electrically connected with the battery, the charging interface and the battery are protected by the battery management circuit, and the Type-C interface is short-circuited to cause overlarge current in a short time and easily burn the Type-C interface and the equipment to be charged. If the first temperature information of the Type-C interface exceeds a safe temperature threshold (such as 60 degrees centigrade), the Type-C interface and the battery are disconnected and quit quick charging, then the power pin of the Type-C interface is grounded and short-circuited, charging is stopped, and temperature reduction of the Type-C interface is realized. Therefore, the problem that the whole system of the to-be-charged equipment is powered off due to the fact that the power pin of the battery is also in ground short circuit when the power pin of the Type-C interface is in ground short circuit in the quick charging mode can be solved.
In some embodiments, before the step of controlling the control terminal of the first switching tube to conduct the input terminal and the output terminal when the first temperature information exceeds the safe temperature threshold, the charging processing method may further include:
acquiring second temperature information in the equipment to be charged; when the second temperature information is smaller than the first temperature threshold, setting a first preset temperature value as a safe temperature threshold; and when the second temperature information is greater than the first temperature threshold, setting a second preset temperature value as a safe temperature threshold, wherein the second preset temperature is greater than the first preset temperature.
The device to be charged further includes a second temperature detection element for detecting the temperature inside the device to be charged. For example, the second temperature detection element may be used to detect the temperature of the battery of the device to be charged, to detect the temperature of the main chip, to detect the temperature of the memory, etc., or may be used to detect the temperatures of a plurality of locations inside the device to be charged, and then determine the safe temperature threshold according to the temperature inside the device to be charged. A higher safe temperature threshold (e.g., 70 degrees celsius) is set when the temperature inside the device to be charged is higher, and a lower safe temperature threshold (e.g., degrees celsius) is set when the temperature inside the device to be charged is lower. The influence of the internal temperature of the device to be charged on the first temperature information of the charging interface can be neutralized. Among them, the second temperature detecting element may be one, two or more. If the number of the second temperature detection elements is two or more, the average value of the temperatures obtained by the plurality of second temperature detection elements may be obtained, and then the safety temperature threshold value may be set according to the average value. The weight value can also be set according to the distance between the second temperature detection element and the charging interface, the closer the distance to the charging interface, the larger the weight value is, and then the average value is obtained after the temperature acquired by each second temperature detection element is multiplied by the weight value.
In some embodiments, before the step of controlling the control terminal of the first switching tube to conduct the input terminal and the output terminal when the first temperature information exceeds the safe temperature threshold, the charging processing method may further include:
acquiring second temperature information in the equipment to be charged; obtaining a corresponding third preset temperature value according to the mapping relation of the second temperature information in the mapping table; and setting the third preset temperature value as a safety temperature threshold value.
The method comprises the steps that a mapping table is prestored in the equipment to be charged, the mapping table at least comprises two groups of data, one group of data is second temperature information in the equipment to be charged, the other group of data is a third preset temperature value corresponding to a safety temperature threshold value, and a mapping relation is set between the two groups of data, so that after the second temperature information is obtained, the corresponding third preset temperature value is obtained according to the mapping table, and then the obtained third preset temperature value is used as the safety temperature threshold value. The mapping table may include a plurality of sets, one set of each set is a third preset temperature value, the other set is second temperature information at different positions, then each set of mapping table obtains a third preset temperature value, thereby obtaining a plurality of third preset temperature values, then averages and takes the average as the safe temperature threshold. After a plurality of third preset temperature values are obtained, each third preset temperature value is multiplied by a weight value corresponding to the corresponding mapping table to obtain an average value, and then the average value is obtained and is used as a safety temperature threshold value.
And the second temperature information is acquired according to a second temperature detection element in the equipment to be charged. The second temperature detection element may be used to detect the temperature inside the device to be charged. For example, the second temperature detection element may be used to detect the temperature of the battery of the device to be charged, to detect the temperature of the main chip, to detect the temperature of the memory, and so on, and may also be used to detect the temperatures of a plurality of locations inside the device to be charged, and then determine the second temperature information according to the temperature inside the device to be charged. Among them, the second temperature detecting element may be one, two or more. If the number of the second temperature detection elements is two or more, the average value may be obtained from the temperatures obtained by the plurality of second temperature detection elements, and then the average value may be used as the second temperature information. The weight value can also be set according to the distance between the second temperature detection elements and the charging interface, the closer the distance to the charging interface, the larger the weight value is, and then the average value is obtained after the temperature acquired by each second temperature detection element is multiplied by the weight value, so that the second temperature information is obtained.
In some embodiments, after the step of controlling the control terminal of the first switch tube to conduct the input terminal and the output terminal so as to stop charging through the charging interface, the charging processing method may further include:
acquiring third temperature information of the charging interface; when the third temperature information is lower than the charging temperature threshold, the control end of the first switch tube is controlled to disconnect the input end and the output end, charging is carried out through the charging interface, and the charging temperature threshold is smaller than the safety temperature threshold.
After the charging is stopped, the temperature of the charging interface naturally drops, when the temperature of the charging interface drops below a charging temperature threshold (such as 40 ℃), the input end and the output end of the control end of the first switch tube are disconnected, and then the charging is carried out through the charging interface. And when liquid enters the charging interface, the temperature of the charging interface rises in the charging process, the liquid can be evaporated, and the liquid can be recovered to be normal after one or more times of charging.
Referring to fig. 10, fig. 10 is a block diagram illustrating an electronic device according to an embodiment of the disclosure. The electronic device 100 may include control circuitry, which may include storage and processing circuitry 61. The storage and processing circuit 61 may be a memory, such as a hard disk drive memory, a non-volatile memory (e.g., a flash memory or other electronically programmable read-only memory used to form a solid state drive, etc.), a volatile memory (e.g., a static or dynamic random access memory, etc.), etc., and the embodiments of the present application are not limited thereto. The processing circuitry in the storage and processing circuitry 61 may be used to control the operation of the electronic device 100. The processing circuitry may be implemented based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application specific integrated circuits, display driver integrated circuits, and the like.
The storage and processing circuitry 61 may be used to run software in the electronic device 100, such as an Internet browsing application, a Voice Over Internet Protocol (VOIP) telephone call application, an email application, a media playing application, operating system functions, and so forth. Such software may be used to perform control operations such as, for example, camera-based image capture, ambient light measurement based on an ambient light sensor, proximity sensor measurement based on a proximity sensor, information display functionality based on status indicators such as status indicator lights of light emitting diodes, touch event detection based on a touch sensor, functionality associated with displaying information on multiple (e.g., layered) displays, operations associated with performing wireless communication functions, operations associated with collecting and generating audio signals, control operations associated with collecting and processing button press event data, and other functions in the electronic device 100, and the like, without limitation of embodiments of the present application.
The electronic device 100 may also include input-output circuitry 62. The input-output circuit 62 may be used to enable the electronic device 100 to input and output data, i.e., to allow the electronic device 100 to receive data from external devices and also to allow the electronic device 100 to output data from the electronic device 100 to external devices. The input-output circuit 62 may further include a sensor 63. The sensors 63 may include ambient light sensors, optical and capacitive based proximity sensors, touch sensors (e.g., optical based touch sensors and/or capacitive touch sensors, where the touch sensors may be part of a touch display screen or may be used independently as a touch sensor structure), acceleration sensors, and other sensors, among others.
Input-output circuitry 62 may also include one or more displays, such as display 64. The display 64 may include one or a combination of liquid crystal displays, organic light emitting diode displays, electronic ink displays, plasma displays, displays using other display technologies. The display 64 may include an array of touch sensors (i.e., the display 64 may be a touch display screen). The touch sensor may be a capacitive touch sensor formed by a transparent touch sensor electrode (e.g., an Indium Tin Oxide (ITO) electrode) array, or may be a touch sensor formed using other touch technologies, such as acoustic wave touch, pressure sensitive touch, resistive touch, optical touch, and the like, and the embodiments of the present application are not limited thereto.
The communication circuit 66 may be used to provide the electronic device 100 with the ability to communicate with external devices. The communication circuitry 66 may include analog and digital input-output interface circuitry, and wireless communication circuitry based on radio frequency signals and/or optical signals. The wireless communication circuitry in communication circuitry 66 may include radio-frequency transceiver circuitry, power amplifier circuitry, low noise amplifiers, switches, filters, and antennas. For example, the wireless Communication circuitry in Communication circuitry 66 may include circuitry to support Near Field Communication (NFC) by transmitting and receiving Near Field coupled electromagnetic signals. For example, the communication circuit 66 may include a near field communication antenna and a near field communication transceiver. The communications circuitry 66 may also include a cellular telephone transceiver and antenna, a wireless local area network transceiver circuit and antenna, and the like.
The electronic device 100 may further include a battery, power management circuitry, and other input-output units 67. The input-output unit 67 may include buttons, joysticks, click wheels, scroll wheels, touch pads, keypads, keyboards, cameras, light emitting diodes and other status indicators, etc.
A user may input commands through input-output circuitry 62 to control the operation of electronic device 100, and may use output data of input-output circuitry 62 to enable receipt of status information and other outputs from electronic device 100.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
An embodiment of the present application further provides a storage medium, where the storage medium stores a computer program, and when the computer program runs on a computer, the computer program causes the computer to execute the charging processing method in any one of the above embodiments, such as: when charging is carried out through the charging interface, first temperature information of the charging interface is acquired; when the first temperature information exceeds a safe temperature threshold value, the control end of the first switch tube is controlled to conduct the input end and the output end so as to stop charging through the charging interface.
In the embodiment of the present application, the storage medium may be a magnetic disk, an optical disk, a Read Only Memory (ROM), a Random Access Memory (RAM), or the like.
It should be noted that, for the charging processing method of the embodiment of the present application, it can be understood by a person skilled in the art that all or part of the process of implementing the charging processing method of the embodiment of the present application can be completed by controlling the relevant hardware through a computer program, where the computer program can be stored in a computer readable storage medium, such as a memory of an electronic device, and executed by at least one processor in the electronic device, and the process of executing the computer program can include the process of the embodiment of the charging processing method. The storage medium may be a magnetic disk, an optical disk, a read-only memory, a random access memory, etc.
The charging circuit, the charging processing method, the electronic device, and the storage medium provided in the embodiments of the present application are described in detail above, and specific examples are applied herein to illustrate the principles and implementations of the present application, and the description of the embodiments above is only used to help understand the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (8)
1. A charging circuit, wherein a device to be charged comprises the charging circuit, the charging circuit comprising:
the charging interface is used for connecting an external charging device;
the first switch tube comprises an input end, an output end and a control end, the input end is connected with the charging interface, and the output end is grounded;
the temperature detection element acquires first temperature information of the charging interface;
the control chip is connected with the temperature detection element and acquires the first temperature information, and the control chip is connected with the control end of the first switch tube;
the control chip acquires the charging information of the external charging device through the charging interface, and obtains whether the external charging device supports quick charging according to the charging information, and selects one of the first charging power and the second charging power as a target charging power according to the charging information, wherein, if the external charging device supports fast charging, the first charging power is selected from the first charging power and the second charging power, if the external charging device does not support fast charging, the second charging power is selected as the target charging power among the first charging power and the second charging power, the control chip transmits control information to the external charging device according to the target charging power, the external charging device is controlled to charge according to the target charging power, wherein the first charging power is larger than the second charging power;
when the target charging power is the first charging power, the other end of the charging interface is used for being directly connected with a battery or being connected with the battery through a second switch tube;
when the target charging power is the second charging power, the other end of the charging interface is connected with a battery through a battery management circuit;
acquiring second temperature information in the equipment to be charged;
when the second temperature information is smaller than a first temperature threshold value, setting a first preset temperature value as a safe temperature threshold value;
when the second temperature information is greater than a first temperature threshold value, setting a second preset temperature value as a safety temperature threshold value, wherein the second preset temperature is greater than the first preset temperature;
when the first temperature information is larger than the safe temperature threshold value and the charging interface is charged through the first charging power, the circuit between the charging interface and the battery is disconnected and quit the quick charging, and then the control end of the first switch tube is controlled to conduct the input end and the output end so as to stop the charging interface from charging.
2. The charging circuit of claim 1, wherein the temperature sensing element is adjacent to or attached to the charging interface.
3. The charging circuit of claim 2, wherein the number of the temperature detecting elements is at least 2, and each of the temperature detecting elements is connected to one detecting pin of the control chip.
4. The charging circuit of claim 1, wherein one end of the temperature detection element is connected to the detection pin of the control chip and is connected to a power supply through a first resistor, and the other end of the temperature detection element is grounded.
5. A charging processing method is applied to equipment to be charged and is characterized in that the equipment to be charged comprises a charging interface and a first switch tube, wherein the input end of the first switch tube is connected with the charging interface, and the output end of the first switch tube is grounded; the method comprises the following steps:
when charging is carried out through the charging interface, first temperature information of the charging interface is acquired;
acquiring charging information of an external charging device, acquiring whether the external charging device supports quick charging according to the charging information, and selecting one of first charging power and second charging power as target charging power according to the charging information, wherein if the external charging device supports quick charging, the first charging power is selected from the first charging power and the second charging power, if the external charging device does not support quick charging, the second charging power is selected from the first charging power and the second charging power as the target charging power, and the first charging power is greater than the second charging power;
when the target charging power is the first charging power, the other end of the charging interface is used for being directly connected with a battery or being connected with the battery through a second switch tube;
when the target charging power is the second charging power, the other end of the charging interface is connected with a battery through a battery management circuit;
acquiring second temperature information in the equipment to be charged;
when the second temperature information is smaller than a first temperature threshold value, setting a first preset temperature value as a safe temperature threshold value;
when the second temperature information is greater than a first temperature threshold value, setting a second preset temperature value as a safety temperature threshold value, wherein the second preset temperature is greater than the first preset temperature;
when the first temperature information is larger than the safe temperature threshold value and the charging interface is charged through the first charging power, the circuit between the charging interface and the battery is disconnected and quit the quick charging, and then the control end of the first switch tube is controlled to conduct the input end and the output end so as to stop the charging interface from charging.
6. The charging processing method according to claim 5, further comprising, before the step of disconnecting the circuit between the charging interface and the battery and then controlling the control terminal of the first switching tube to turn on the input terminal and the output terminal when the first temperature information is greater than the safe temperature threshold and the charging interface is charged with the first charging power, the step of:
acquiring second temperature information in the equipment to be charged;
obtaining a corresponding third preset temperature value according to the mapping relation of the second temperature information in a mapping table;
and setting the third preset temperature value as the safe temperature threshold value.
7. An electronic device comprising a charging circuit and a battery, the charging circuit being connected to the battery, the charging circuit according to any one of claims 1-4.
8. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the charging processing method according to any one of claims 5 to 6.
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| CN110021981B (en) * | 2019-04-30 | 2021-03-23 | 维沃移动通信有限公司 | Charger and terminal |
| CN110247457A (en) * | 2019-07-16 | 2019-09-17 | 佛山安豪科技服务有限公司 | Charge control method, charging unit, storage medium and electronic equipment |
| CN110492576A (en) * | 2019-09-06 | 2019-11-22 | 上海闻泰电子科技有限公司 | Control device, method and the electronic equipment of charge port temperature |
| CN113765165A (en) * | 2020-06-03 | 2021-12-07 | 北京小米移动软件有限公司 | Charging interface, protection method and protection device for charging interface and storage medium |
| CN112910041B (en) * | 2021-01-28 | 2024-06-25 | 维沃移动通信有限公司 | Charging circuit of terminal equipment, terminal equipment and terminal system |
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| MY144094A (en) * | 2007-12-21 | 2011-08-15 | Motorola Solutions Inc | Method and apparatus for bi-contact battery-charger system |
| CN106654424A (en) * | 2016-11-30 | 2017-05-10 | 努比亚技术有限公司 | Charging method and terminal |
| CN106786871A (en) * | 2016-12-19 | 2017-05-31 | 北京小米移动软件有限公司 | Charge control method, apparatus and system |
| CN106602513A (en) * | 2017-01-13 | 2017-04-26 | 顺丰科技有限公司 | Short circuit protection charging interface and control method thereof |
| CN107196363B (en) * | 2017-05-23 | 2020-12-18 | 南京车链科技有限公司 | Method for adjusting charging current, terminal and computer readable storage medium |
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