CN108370170B - Short-circuit fault processing device and method - Google Patents

Short-circuit fault processing device and method Download PDF

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Publication number
CN108370170B
CN108370170B CN201780003955.4A CN201780003955A CN108370170B CN 108370170 B CN108370170 B CN 108370170B CN 201780003955 A CN201780003955 A CN 201780003955A CN 108370170 B CN108370170 B CN 108370170B
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CN
China
Prior art keywords
charging
signal
short
module
terminal
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CN201780003955.4A
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Chinese (zh)
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CN108370170A (en
Inventor
胡征远
贺彦国
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华为技术有限公司
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Priority to CN2017101094796 priority Critical
Priority to CN201710109479 priority
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2017/089886 priority patent/WO2018152993A1/en
Publication of CN108370170A publication Critical patent/CN108370170A/en
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Publication of CN108370170B publication Critical patent/CN108370170B/en

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007Regulation of charging or discharging current or voltage
    • H02J7/0072Regulation of charging or discharging current or voltage using semiconductor devices only
    • H02J7/0077Regulation of charging or discharging current or voltage using semiconductor devices only the charge cycle being terminated in response to electric parameters
    • H02J7/008Regulation of charging or discharging current or voltage using semiconductor devices only the charge cycle being terminated in response to electric parameters with the battery connected to the charge circuit
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits

Abstract

A short-circuit fault processing device and method, wherein the short-circuit fault processing device comprises a short-circuit fault processing circuit, and the short-circuit fault processing circuit can comprise: the device comprises an input power supply, a driving power supply, a control module, a detection module and a fault processing module; the detection module sends a signal to the control module when detecting that the terminal equipment to be charged is accessed; when the control module receives the signal sent by the detection module, the connection between the power supply input end of the terminal equipment and the driving power supply is conducted, and the detection module is triggered to detect the access signal; the control module switches on the connection between the power input end of the terminal device and the input power when the detection module detects that the path signal is normal, or sends a trigger signal to the fault processing module to trigger the fault processing module to process the short-circuit fault when the detection module detects that the path signal is abnormal. By adopting the short-circuit fault processing device and method, abnormal short-circuit faults at the charging interface of the terminal equipment can be processed in time, and the service life of the charging interface is prolonged.

Description

Short-circuit fault processing device and method

Technical Field

The invention relates to the technical field of electronics, in particular to a short-circuit fault processing device and method.

Background

With the increasing popularization of terminal devices such as wearable devices or mobile phones, the terminal devices become one of the essential tools in daily life of terminal device users. The higher the frequency of use of the terminal device, the higher the frequency of charging of the terminal device. At present, the charging methods that terminal equipment such as wearable equipment adopted are more wired charging methods, that is, the terminal equipment needs to establish wired connection with charging equipment before charging through charging equipment. When the terminal equipment is charged through the charging equipment in a wired connection mode, a charging interface connected with the charging equipment of the terminal equipment is easily contaminated with liquid with electrolyte, such as water or sweat, so that the short-circuit fault that the charging path signal is abnormal due to liquid contamination occurs at the charging interface when the terminal equipment is charged through the charging equipment. In addition, the liquid contamination at the charging interface can lead to the electrolysis of the positive electrode and the negative electrode of the charging interface, and lead to the corrosion and failure of the charging terminal at the charging interface.

In the prior art, a waterproof plug is added at a charging interface of the terminal equipment to prevent the charging interface of the charging equipment from being corroded by liquid with electrolyte. The prior art can not detect the short circuit fault of abnormal channel signals caused by liquid contamination, and has poor applicability. In addition, the waterproof plug is easy to fall off, the effect of preventing the charging interface from being corroded is poor, and the service life of the charging interface is short.

Disclosure of Invention

The embodiment of the invention provides a short-circuit fault processing device and a short-circuit fault processing method, which can detect a short-circuit fault caused by abnormal signals of a charging interface of a terminal device, process the charging interface fault of the terminal device in time, prolong the service life of the charging interface and have high applicability.

A first aspect provides a short-circuit fault handling circuit, which may include: the device comprises an input power supply, a driving power supply, a control module, a detection module and a fault processing module;

one end of the detection module is connected with the control module, the other end of the detection module is used as an access end of the terminal equipment to be charged, and the detection module is used for sending a signal to the control module when the terminal equipment to be charged is detected to be accessed;

one end of the control module is connected with the fault processing module, and the control module is used for conducting connection between the power input end of the terminal device and the driving power supply and triggering the detection module to carry out access signal detection on the power input end of the terminal device when receiving the signal sent by the detection module; the driving power supply is connected with a power supply input end of the terminal equipment and is used for providing driving voltage for the terminal equipment;

the detection module is used for detecting whether the path signal on the power supply access end of the terminal equipment is abnormal or not;

the control module is further configured to switch on a connection between the power input end of the terminal device and the input power when the detection module detects that the path signal is normal, or send a trigger signal to the fault processing module to trigger the fault processing module to process a short-circuit fault of the abnormal path signal when the detection module detects that the path signal is abnormal.

Optionally, the fault processing module includes a heating module, and the heating module is disposed on a surface of the connection assembly between the detection module and the terminal device;

the heating module is used for heating the surface of the connecting component when receiving the trigger signal sent by the control module.

Optionally, the heating module includes: at least one controllable heating element of a heating resistor and a heating coil.

Optionally, the fault handling module comprises an alarm module;

the alarm module is used for sending out an alarm signal to prompt that a charging path of the terminal equipment breaks down when receiving the trigger signal sent by the control module.

Optionally, the alarm module includes: at least one of a buzzer, an indicator light, and a terminal screen.

Optionally, the detection module includes a short-circuit voltage detection pin, and the short-circuit voltage detection pin is connected to an equivalent initial resistance of the terminal device;

the detection module is used for detecting the voltage of the short-circuit voltage detection pin when detecting that the terminal equipment to be charged is accessed, and determining whether the voltage of the short-circuit voltage detection pin is abnormal or not according to a preset voltage threshold;

and if the voltage of the short-circuit voltage detection pin is abnormal, determining that a path signal on the power supply input end of the terminal equipment is abnormal.

A second aspect provides a charging device including the short-circuit fault handling circuit provided in the first aspect.

A third aspect provides a method for processing a short-circuit fault, where the method is applied to a charging apparatus for detecting a signal of a charging path of a terminal device to be charged, and the method includes:

when the charging device detects that the terminal equipment to be charged is accessed, a path signal of a charging path of the terminal equipment connected with a driving power supply is detected;

the charging device determines whether the path signal is abnormal according to a preset signal threshold;

if the path signal is not abnormal, the charging device conducts the connection between the power supply input end of the terminal equipment and a charging input power supply; or

And if the path signal is abnormal, the charging device triggers a fault processing module to process the short-circuit fault of the abnormal path signal.

Optionally, the fault processing module includes a heating module, and the heating module is disposed on a surface of the connecting assembly between the charging device and the terminal device;

the triggering fault processing module is used for processing the short-circuit fault with the abnormal path signal and comprises the following steps:

and triggering the heating module to heat the surface of the connecting component so as to process the short-circuit fault with the abnormal path signal.

Optionally, the fault handling module comprises an alarm module;

the triggering fault processing module is used for processing the short-circuit fault with the abnormal path signal and comprises the following steps:

and triggering the alarm module to send out an alarm signal to prompt that the charging path of the terminal equipment has a fault.

Optionally, the charging path signal includes a voltage value at a charging path node, the charging path node includes a short-circuit voltage detection pin of the charging apparatus, the short-circuit voltage pin is connected to a power input terminal of the terminal device, the power input terminal of the terminal device is further connected to a driving power supply in the charging apparatus, and the preset signal threshold includes a preset voltage threshold;

the detecting a path signal of a charging path of the terminal device connected to a driving power supply includes:

detecting a voltage value on a short-circuit voltage detection pin of the charging device;

the charging device determining whether the path signal is abnormal according to a preset signal threshold value comprises the following steps:

and the charging device judges whether the difference value between the voltage value on the short-circuit voltage detection pin and a preset voltage threshold value is smaller than or equal to a preset difference value threshold value, if so, the passage signal is determined to be abnormal, otherwise, the passage signal is determined not to be abnormal.

In the embodiment of the invention, the short-circuit fault processing circuit of the charging device can detect whether the signal of the charging interface of the terminal equipment is abnormal or not through the detection module. If the signal of the charging interface is abnormal, the control module can trigger the fault processing module to process the fault. The fault processing module can solve the fault in a heating liquid evaporation mode, and can also prompt a terminal device user to process the fault through an alarm signal, so that normal charging of the terminal device can be guaranteed, the fault of a charging interface of the terminal device can be processed in time, the service life of the charging interface can be prolonged, and the service lives of the terminal device and the charging device can be prolonged.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a charging device system architecture according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a charging assembly connection provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of a short-circuit fault processing circuit according to an embodiment of the present invention;

fig. 4 is another schematic structural diagram of a short-circuit fault processing circuit according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a charging system circuit according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating a method for processing a short-circuit fault according to an embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

In a specific implementation, the terminal device according to the embodiment of the present invention may be a device (device) that provides voice and/or data connectivity to a user, and includes a wired terminal and a wireless terminal. The wireless terminal may be a handheld device having wireless connection capability or other processing device connected to a wireless modem. For example, the wireless terminal may be a mobile phone, a computer, a tablet computer, a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a wearable device, an electronic book reader (e-book reader), and the like. As another example, a wireless terminal may be a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device. For convenience of description, in the following description of the embodiments of the present invention, the above-mentioned devices will be described by taking terminal devices as examples. The charging device provided by the embodiment of the invention can be specifically a charger, a charging base or a charger of a terminal device, and the like, and is not limited herein.

Fig. 1 is a schematic diagram of a charging device system architecture according to an embodiment of the present invention. The charging device system architecture provided by the embodiment of the invention can comprise terminal equipment and a charging device thereof, wherein the terminal equipment is connected with the charging device through a charging assembly. As shown in fig. 1, the terminal device provided by the embodiment of the present invention may be a wristwatch, which may also be one of wearable devices. The charging device is a charging base of the wristwatch. The connecting assembly of the charging device is a convex metal block, and the connecting assembly of the wristwatch is a metal block arranged in the groove. Fig. 2 is a schematic diagram of a charging assembly according to an embodiment of the present invention. And the connecting components of the terminal equipment are connected with the connecting components of the charging device in a one-to-one pairing mode. For example, the terminal device may include two connection assemblies, such as the connection assembly 21 and the connection assembly 22, and the charging apparatus may also include two connection assemblies, such as the connection assembly 11 and the connection assembly 12. When the terminal equipment is connected with the charging device, the connecting assembly 11 is connected with the connecting assembly 21 in a matching mode, and the connecting assembly 12 is connected with the connecting assembly 22 in a matching mode. The connecting assembly 21 and the connecting assembly 22 may be a positive pin and a negative pin of a power supply of a terminal device.

Optionally, the number of the connecting assemblies of the terminal device or the connecting assemblies of the charging device may also be greater than 2, which may be determined according to an actual application scenario, and is not limited herein. When the number of the connecting assemblies of the terminal equipment is more than 2, 2 of the connecting assemblies can be used as positive and negative electrode pins of a charging power supply of the terminal equipment. After the positive and negative poles of the charging power source of the terminal device (for example, the connection assemblies 21 and 22) are connected to the positive and negative pins (for example, the connection assemblies 11 and 12) of the output power source of the charging device, the terminal device can be charged after the charging device is powered on. If there is liquid contamination between the connection assembly 11 and the connection assembly 21 (or between the connection assembly 12 and the connection assembly 22), an equivalent liquid contamination resistance will occur between the positive electrode and the negative electrode of the power supply of the terminal device, and the voltage stability of the positive electrode of the power supply of the terminal device is further affected. Therefore, the charging device can determine whether an abnormal short-circuit fault, such as a fault of abnormal voltage value caused by liquid contamination equivalent resistance, occurs between the charging device and the connection component of the terminal device by detecting the signal stability (e.g., voltage stability) at a charging node, such as the positive electrode of the charging power supply, in the charging path of the terminal device. In addition, if the failure caused by the liquid contamination is not treated, the connecting component will be corroded and damaged, and the service life of the charging device or the terminal equipment will be affected.

The embodiment of the invention provides a short-circuit fault processing device and a short-circuit fault processing method. If the abnormal passage signal in the charging passage is detected, the short-circuit fault of the abnormal passage signal can be processed, so that the connecting component of the charging device and the terminal equipment can be prevented from being damaged, and the service life of the charging device and the terminal equipment can be prolonged.

Fig. 3 is a schematic structural diagram of a short-circuit fault processing circuit according to an embodiment of the present invention. The short-circuit fault processing circuit provided by the embodiment of the invention can comprise: the device comprises an input power supply, a driving power supply, a control module, a detection module and a fault processing module.

Optionally, the input power may include a dc power or an ac power, etc. The input power supply can be a power supply input end of the charger and can also be a power supply input end of the battery pack. For example, the charger inputs alternating current, and the voltage of the alternating current can be 4.6V-12V and the like. The driving power source may include a voltage source or a current source, and the like, which is not limited herein.

Optionally, the control module may include a microprocessor, an application processor, a central processing unit, a programmable logic array, a control circuit built by a transistor or other devices, and the like, which is not limited herein.

Optionally, the detection module provided in the embodiment of the present invention includes, but is not limited to, a current detection module, a voltage detection module, an analog-to-digital conversion module, an impedance measurement circuit, and the like.

In a specific implementation, the detection module may be specifically disposed in a connection assembly where the charging device is connected to the terminal device, and one end of the detection device may be a metal block or a metal patch of the connection assembly, which is used as an access end of the terminal device, such as the connection assemblies 11 and 12 in fig. 2. One end of the detection module is connected with the control module, and the detection module is used for sending a signal to the control module when detecting that the terminal device to be charged is accessed.

Optionally, the control module shown in fig. 3 may include a switch unit, where the switch unit is used to control on/off of the input power or the driving power and the power input end of the terminal device to be charged. The above switching unit may include: switching elements such as multi-way analog switches, digital switches, and relays, wherein the relays may include electromagnetic relays, etc., without limitation. One end of the control module is connected with the fault processing module, and the control module is used for triggering the switch unit to conduct connection between the power input end of the terminal device and the driving power supply and triggering the detection module to perform access signal detection on the charging access of the terminal device when receiving an indication signal sent by the detection module and accessed by the terminal device. The charging path may be a connection path between the terminal device and the driving power supply, and the path signal may be a signal such as a voltage value at a power supply input terminal of the terminal device. The driving power supply is connected with a power input end of the terminal equipment and used for providing driving voltage for the terminal equipment so as to detect the liquid contamination condition at the charging interface of the terminal equipment before the terminal equipment is connected with the input power supply. The detection module is used for detecting whether a path signal at a charging interface (for example, a power input end, for example, a power supply positive electrode of the terminal device) of the terminal device is abnormal or not according to a driving voltage provided by the driving power supply to the terminal device.

In specific implementation, when the terminal equipment is connected to the charging device, the connecting assembly of the terminal equipment is connected with the connecting assembly of the charging device, and the trigger detection module sends a signal to the control module. Specifically, the connecting component of the terminal device may be a protruding metal sheet, a protruding mechanical switch, a terminal device magnet, or the like, and the corresponding connecting component of the charging device may also be a protruding metal sheet, a protruding mechanical switch, a hall sensor, or the like, which is not limited herein. In specific implementation, after the terminal device is connected with the charging device, the detection module can be triggered to send a signal to the control module in a wireless mode.

The control module triggers the switch unit to conduct a driving power supply input channel of the charging device to the detection module, and the detection module can detect a channel signal of the charging channel. If the terminal device has liquid contamination between the positive and negative input terminals of the power supply (such as the power input terminal and the ground terminal in fig. 3), the terminal device side will have an equivalent resistance caused by the liquid contamination. The liquid-contaminated equivalent resistor and the terminal equipment built-in equivalent resistor form a parallel connection state, and further bias voltage appears at the power supply input end of the terminal equipment on the voltage provided by the driving power supply. The bias voltage of the driving source indicates that the equivalent resistance existing due to the liquid contamination causes the signal detection value of the power supply input terminal of the terminal equipment to deviate from the preset signal threshold value. The detection module can return a signal with an abnormal channel signal to the control module as long as the detection module detects that a signal detection value of a power supply access end of the terminal device is different from a preset signal threshold value or the difference value of the signal detection value and the preset signal threshold value exceeds a preset difference value range. The signal threshold may be a voltage threshold. In a specific implementation, after the terminal device is connected to the charging device through the charging path, the detection module may detect a voltage value at the power supply access terminal of the terminal device (or referred to as a voltage value between a positive electrode and a negative electrode of the charging interface of the terminal device). If the detected voltage value is the same as the voltage threshold value, or the difference value between the detected voltage value and the voltage threshold value is within a preset difference value range, the charging path can be determined to be in a normal working state. If the detected voltage value is different from the voltage threshold value, or the difference value between the detected voltage value and the voltage threshold value exceeds a preset difference value range, the charging path can be determined to have an abnormal fault.

In specific implementation, the control module may send a trigger signal to the fault processing module when the detection module detects that the path signal is abnormal, so as to trigger the fault processing module to process a short-circuit fault of the abnormal path signal.

Optionally, the fault handling module may be a heating module, such as a heating resistor or a heating coil. Optionally, the heating module may be disposed on a surface of a connection assembly between a detection module of the charging device and the terminal device. For example, the heating module may be a heating resistor or a heating coil provided on a surface of the connection assembly 11 and/or 12 shown in fig. 2. The heating resistor or the heating coil can heat the surface of the connecting component 11 and/or 12 when receiving a trigger signal sent by the control module, so as to evaporate liquid on the surface of the connecting component 11 and/or 12, and solve the short circuit fault caused by liquid contamination.

Optionally, the fault handling module may also be a human-computer interaction module (or called alarm module), such as a buzzer, an indicator light, a terminal screen, and the like. Optionally, the alarm module may send an alarm signal to prompt that the charging path of the terminal device fails when receiving the trigger signal sent by the control module. The alarm signal may be light, buzzer, horn, text message, etc. For example, the alarm module can prompt the user of the terminal device to clean the charging device or the charging interface of the terminal device by means of sounding of a buzzer, flashing of an indicator light, screen prompt and the like.

Further, the detection module can periodically start the channel signal detection of the charging channel to confirm whether the abnormal fault of the channel signal disappears. If the detection module detects that the voltage value between the positive electrode and the negative electrode of the charging interface of the terminal equipment is the voltage value in the normal state (namely the preset voltage threshold), a normal signal is returned to the control module, the control module switches the power supply access to the power supply input end, namely the control module can trigger the switch unit to conduct the power supply access end of the terminal equipment and the charging access of the charger (namely the input power supply), and the terminal equipment can be charged normally.

Further, referring to fig. 4, it is another schematic structural diagram of the short-circuit fault processing circuit according to the embodiment of the present invention. In some possible embodiments, the detection module may include a short-circuit voltage detection pin, and the short-circuit voltage detection pin is connected to the power input terminal of the terminal device. The detection module is used for detecting the voltage of the short-circuit voltage detection pin when detecting that the terminal device to be charged is accessed, and determining whether the voltage of the short-circuit voltage detection pin is abnormal or not according to a preset voltage threshold. Specifically, the detection module may periodically detect a voltage value at the short-circuit voltage detection pin, and may record the detected voltage value at each period. If the voltage value of the short-circuit voltage detection pin is detected to be different from the preset voltage threshold value or the difference value of the voltage value of the short-circuit voltage detection pin and the preset voltage threshold value exceeds the preset difference value threshold value in a certain detection period, the abnormal channel signal of the charging channel of the terminal equipment can be determined, and then the signal can be sent to the control module.

In the embodiment of the invention, the short-circuit fault processing circuit of the charging device can detect whether the channel signal in the charging channel of the terminal equipment is abnormal or not through the detection module. If the path signal is abnormal, the control module can trigger the fault processing module to process the fault. The fault processing module can solve the fault in a mode of heating liquid evaporation, and can also prompt a terminal device user to process the fault through an alarm signal, so that normal charging of the terminal device can be guaranteed, and the service lives of the terminal device and the charging device are prolonged.

The following describes an implementation of the short-circuit fault processing circuit provided in the embodiment of the present invention with reference to the circuit structure illustrated in fig. 5. Fig. 5 is a schematic diagram of a charging system circuit according to an embodiment of the invention. The charging system architecture shown in fig. 5 includes a charging module of the charging device and a charging module of the terminal device body. Wherein, charging module among the charging device includes: the device comprises an input power VCC, a level conversion unit, a control module, a detection module, a driving power VCC1 and a fault processing module. Wherein, the control module comprises a control unit and a switch unit K1-1 and K1-2. The heating module can comprise a heating resistor RL and a conducting switch K2, and the control unit can trigger the heating module to heat through K2, so that the abnormal fault of the charging path can be processed. The detection module comprises a detection module 1 and a detection module 2, wherein the control module controls the conduction or short circuit of the detection module 1 and a path of the driving power supply through K1-2. The driving power source VCC1 is connected to K1-2 through a diode and a voltage dividing resistor R1. The detection module 2 determines whether the positive electrode and the negative electrode of the charging interface of the terminal device are connected by an abnormal resistor, for example, whether the equivalent resistor R3 is connected or not due to liquid contamination, by detecting the voltage value at the end of the voltage dividing resistor R1.

The terminal device body may include a charging module and other functional modules (not shown in fig. 5). The resistors in the terminal device body may include built-in resistor R4 and equivalent initial resistor R2 of the charging module (e.g., equivalent resistors of other modules of the terminal device, such as the terminal device equivalent initial resistors in fig. 3 or fig. 4).

In a specific implementation, the charging base of the terminal device may detect a through-current condition between the RI and a ground terminal (GND, for example, a negative power pin of the terminal device) of the terminal device body through the IO5, so as to determine whether the terminal device body is connected to the charging base. If the IO5 detects that the terminal device body is connected with the charging base, after a charger (input power VCC is connected) is plugged into the base of the terminal device, the K1-1 is cut off by default, the K1-2 is opened by default, and the K2 is disconnected. An input/output (IO) of the detection module 2 (e.g., IO3) polls a voltage of a connection pin connected to the power input terminal of the terminal device body. When the terminal device body is connected to the cradle, the default state of the voltage at IO3 pin is pulled low from VCC1 by the resistor included in the terminal device body. R2 and R4 of the terminal equipment body are connected in parallel (can be recorded as R2// R4) and are connected with R1 in series to a driving power supply VCC1, and R1 and R2// R4 are voltage dividing resistors of a driving voltage VCC 1. According to VCC1, and R1, R2 and R4, the voltage value divided at R1 or R2// R4 can be determined, and the preset voltage threshold value at the power input terminal C of the terminal equipment under the normal working state can be preset. If the detection module 2 detects that the voltage of the IO3 port is equal to the preset voltage threshold at the power input end C (for example, at the positive pin of the power supply), it may determine that the connection between the terminal device body and the base is normal. The detection module 2 can send a signal to the control module, and the control module can close the K1-2 and open the K1-1 to enter a normal charging process of the terminal equipment. If the voltage detected by the IO3 of the detection module 2 is not within the divided voltage range formed by R1 and R2// R4, but falls within the divided voltage range formed by R1 and R2// R3// R4, it can be considered that an abnormal short circuit/impedance connection is formed between the power access terminal of the terminal device body and the ground at this time. The detection module 2 can send a signal to the control module, and the control module can enable the RL to generate heat and rapidly raise the temperature to evaporate the liquid by conducting the RL. Wherein the heat generation temperature of the RL is less than the protection temperature (e.g., 58 ℃) of the battery. After the liquid is evaporated due to heat generation of RL, R3 disappears, and the voltage of IO3 falls within the voltage division range formed by R1 and R2// R4 (which is less than or equal to the preset voltage threshold of the power input terminal C of the terminal device), so that the charging path of the terminal device returns to normal. If the voltage detected by the IO3 is recovered to the voltage division range of R1 and R2// R4, K1-2 is closed, K1-1 is opened, and the normal charging process is carried out. IO2 may continue to detect the conducting state of K1-2 before the terminal device enters the normal charging state. After the terminal device enters the charging process, the IO3 path is cut off.

In the system configuration shown in fig. 5, the terminal device charging cradle can detect the current flowing between RI and the ground terminal path of the terminal device body through IO 5. When the charging of the terminal device body is finished and the terminal device user disconnects the terminal device body from the base, the IO5 can detect that the current on the RI is smaller than the preset current threshold, and then it can be determined that the terminal device body is disconnected, and further the detection state of the IO3 polling pin voltage of the detection module 2 is triggered.

Optionally, the detection module 1 and the detection module 2 may also be the same module, and may be specifically determined according to a circuit design requirement of an actual application scenario, which is not limited herein.

Fig. 6 is a schematic flow chart of a method for processing a short-circuit fault according to an embodiment of the present invention. The method for processing the short-circuit fault is suitable for detecting the signal of the charging path of the terminal equipment to be charged by the charging device. The embodiment of the present invention will be described with a charging device as an execution subject, which may include the steps of:

and S61, detecting whether the terminal equipment to be charged is accessed, and if the judgment result is yes, executing the step S62.

And S62, detecting a path signal of a charging path of the terminal equipment connected with the driving power supply.

S63, determining whether the path signal is abnormal according to a preset signal threshold, if so, executing step S64, otherwise, executing step S65.

And S64, triggering a fault processing module to process the abnormal short-circuit fault of the path signal.

And S65, connecting the power input end of the terminal equipment with the charging input power supply.

Optionally, the fault processing module includes a heating module, and the heating module is disposed on a surface of the connecting assembly between the charging device and the terminal device;

the triggering fault processing module is used for processing the short-circuit fault with the abnormal path signal and comprises the following steps:

and triggering the heating module to heat the surface of the connecting component so as to process the short-circuit fault with the abnormal path signal.

Optionally, the fault handling module comprises an alarm module;

the triggering fault processing module is used for processing the short-circuit fault with the abnormal path signal and comprises the following steps:

and triggering the alarm module to send out an alarm signal to prompt that the charging path of the terminal equipment has a fault.

Optionally, the charging path signal includes a voltage value at a charging path node, the charging path node includes a short-circuit voltage detection pin of the charging apparatus, the short-circuit voltage pin is connected to a power input terminal of the terminal device, the power input terminal of the terminal device is further connected to a driving power supply in the charging apparatus, and the preset signal threshold includes a preset voltage threshold;

the detecting a path signal of a charging path of the terminal device connected to a driving power supply includes:

detecting a voltage value on a short-circuit voltage detection pin of the charging device;

the charging device determining whether the path signal is abnormal according to a preset signal threshold value comprises the following steps:

and the charging device judges whether the difference value between the voltage value on the short-circuit voltage detection pin and a preset voltage threshold value is smaller than or equal to a preset difference value threshold value, if so, the passage signal is determined to be abnormal, otherwise, the passage signal is determined not to be abnormal.

In a specific implementation, the short-circuit fault processing method may be executed by a control module of the charging device. The control module of the charging device may include a storage unit for storing a set of program codes. The processor (including microprocessor, application processor, central processing unit, programmable logic array, etc.) included in the control module of the charging device is used for calling the program code stored in the storage unit and executing the implementation manner described in the above steps. The process of the charging device executing the implementation described in the above steps may refer to the implementation executed by each module of the charging device in the above embodiments, and is not described herein again.

In the embodiment of the invention, the short-circuit fault processing circuit of the charging device can detect whether the channel signal in the charging channel of the terminal equipment is abnormal or not through the detection module. If the path signal is abnormal, the control module can trigger the fault processing module to process the fault. The fault processing module can solve the fault in a mode of heating liquid evaporation, and can also prompt a terminal device user to process the fault through an alarm signal, so that normal charging of the terminal device can be guaranteed, and the service lives of the terminal device and the charging device are prolonged.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.

Claims (11)

1. A short-circuit fault handling circuit, comprising: the device comprises an input power supply, a driving power supply, a control module, a detection module and a fault processing module;
one end of the detection module is connected with the control module, the other end of the detection module is used as an access end of the terminal equipment to be charged, and the detection module is used for sending a signal to the control module when the terminal equipment to be charged is detected to be accessed;
one end of the control module is connected with the fault processing module, and the control module is used for conducting connection between the power input end of the terminal device and the driving power supply and triggering the detection module to carry out access signal detection on the power input end of the terminal device when receiving the signal sent by the detection module; the driving power supply is connected with a power supply input end of the terminal equipment and is used for providing driving voltage for the terminal equipment;
the detection module is used for detecting whether the path signal on the power supply access end of the terminal equipment is abnormal or not;
the control module is further configured to switch on a connection between the power input end of the terminal device and the input power when the detection module detects that the path signal is normal, or send a trigger signal to the fault processing module to trigger the fault processing module to process a short-circuit fault of the abnormal path signal when the detection module detects that the path signal is abnormal.
2. The short-circuit fault handling circuit of claim 1, wherein the fault handling module comprises a heating module disposed on a surface of a connection assembly of the detection module and the terminal device;
the heating module is used for heating the surface of the connecting component when receiving the trigger signal sent by the control module.
3. The short-circuit fault handling circuit of claim 2, wherein the heating module comprises: at least one controllable heating element of a heating resistor and a heating coil.
4. The short-circuit fault handling circuit of claim 1, wherein the fault handling module comprises an alarm module;
the alarm module is used for sending out an alarm signal to prompt that a charging path of the terminal equipment breaks down when receiving the trigger signal sent by the control module.
5. The short-circuit fault handling circuit of claim 4, wherein the alarm module comprises: at least one of a buzzer, an indicator light, and a terminal screen.
6. The short-circuit fault handling circuit of any of claims 1-5, wherein the detection module includes a short-circuit voltage detection pin connected to an equivalent initial resistance of the terminal device;
the detection module is used for detecting the voltage of the short-circuit voltage detection pin when detecting that the terminal equipment to be charged is accessed, and determining whether the voltage of the short-circuit voltage detection pin is abnormal or not according to a preset voltage threshold;
and if the voltage of the short-circuit voltage detection pin is abnormal, determining that a path signal on the power supply input end of the terminal equipment is abnormal.
7. A charging device characterized in that it comprises a short-circuit fault handling circuit according to any one of claims 1 to 6.
8. A method for processing short-circuit fault, wherein the method is applied to signal detection of a charging path of a terminal device to be charged by a charging apparatus, and the method comprises:
when the charging device detects that the terminal equipment to be charged is accessed, a path signal of a charging path of the terminal equipment connected with a driving power supply is detected;
the charging device determines whether the path signal is abnormal according to a preset signal threshold;
if the path signal is not abnormal, the charging device conducts the connection between the power supply input end of the terminal equipment and a charging input power supply; or
If the path signal is abnormal, the charging device triggers a fault processing module to process the short-circuit fault of the abnormal path signal;
the fault processing module comprises a heating module, and the heating module is arranged on the surface of a connecting component of the charging device and the terminal equipment;
the triggering fault processing module is used for processing the short-circuit fault with the abnormal path signal and comprises the following steps:
and triggering the heating module to heat the surface of the connecting component so as to process the short-circuit fault with the abnormal path signal.
9. The method of claim 8, wherein the fault handling module comprises an alarm module;
the triggering fault processing module is used for processing the short-circuit fault with the abnormal path signal and comprises the following steps:
and triggering the alarm module to send out an alarm signal to prompt that the charging path of the terminal equipment has a fault.
10. The method of any of claims 8-9, wherein the charge path signal comprises a voltage value at a charge path node, the charge path node comprising a short circuit voltage detection pin of the charging apparatus, the short circuit voltage pin coupled to a power input of the terminal device, the power input of the terminal device further coupled to a driving power supply in the charging apparatus, the preset signal threshold comprising a preset voltage threshold;
the detecting a path signal of a charging path of the terminal device connected to a driving power supply includes:
detecting a voltage value on a short-circuit voltage detection pin of the charging device;
the charging device determining whether the path signal is abnormal according to a preset signal threshold value comprises the following steps:
and the charging device judges whether the difference value between the voltage value on the short-circuit voltage detection pin and a preset voltage threshold value is smaller than or equal to a preset difference value threshold value, if so, the passage signal is determined to be abnormal, otherwise, the passage signal is determined not to be abnormal.
11. A method for processing short-circuit fault, wherein the method is applied to signal detection of a charging path of a terminal device to be charged by a charging apparatus, and the method comprises:
when the charging device detects that the terminal equipment to be charged is accessed, a path signal of a charging path of the terminal equipment connected with a driving power supply is detected;
the charging device determines whether the path signal is abnormal according to a preset signal threshold;
if the path signal is not abnormal, the charging device conducts the connection between the power supply input end of the terminal equipment and a charging input power supply; or
If the path signal is abnormal, the charging device triggers a fault processing module to process the short-circuit fault of the abnormal path signal;
the charging path signal comprises a voltage value on a charging path node, the charging path node comprises a short-circuit voltage detection pin of the charging device, the short-circuit voltage pin is connected with a power input end of the terminal equipment, the power input end of the terminal equipment is also connected with a driving power supply in the charging device, and the preset signal threshold comprises a preset voltage threshold;
the detecting a path signal of a charging path of the terminal device connected to a driving power supply includes:
detecting a voltage value on a short-circuit voltage detection pin of the charging device;
the charging device determining whether the path signal is abnormal according to a preset signal threshold value comprises the following steps:
and the charging device judges whether the difference value between the voltage value on the short-circuit voltage detection pin and a preset voltage threshold value is smaller than or equal to a preset difference value threshold value, if so, the passage signal is determined to be abnormal, otherwise, the passage signal is determined not to be abnormal.
CN201780003955.4A 2017-02-27 2017-06-24 Short-circuit fault processing device and method CN108370170B (en)

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