Device, system and method for detecting charging connection safety of electric equipment

Abstract

The present invention provides a device, system and method for detecting the safety of charging connection of an electrical device. The detection device includes: a signal generating module for sending a pulse signal to a first diode of the electrical device and detecting changes in the pulse signal to obtain a detection signal; a voltage detection module for performing voltage detection on the detection signal to obtain a sampling signal; a control module for obtaining a negative voltage peak of the detection signal based on the duty cycle of the pulse signal and the sampling signal, and determining whether the electrical device has been safely connected for charging based on the negative voltage peak. The present invention can detect the charging connection status of the electrical device to ensure the safety and reliability of the charging process of the electrical device.

Description

Technical Field

[0001] The present invention relates to the technical field of power electronic equipment, and in particular to a device, system and method for detecting charging connection safety of electric equipment. Background Art

[0002] In the field of power electronics, charging devices are often required to charge electrical devices. The safety of the charging connection is particularly important when charging electrical devices. With the rapid development of electric vehicle technology, electric vehicles, as electrical devices, are now primarily equipped with charging tools such as charging guns. To ensure the safety of charging electrical devices, a secure connection between the electric vehicle and the charging gun is essential. An unstable connection between the electric vehicle and the charging gun can easily cause short circuits and other safety hazards, posing a potential safety hazard. This can damage the electric vehicle's related equipment, resulting in significant economic losses and casualties. Summary of the Invention

[0003] One object of the present invention is to provide a device for detecting the safety of charging connections for electrical equipment, which detects the charging connection status of electrical equipment and ensures the safety and reliability of the charging process of the electrical equipment. Another object of the present invention is to provide a system for charging electrical equipment. Another object of the present invention is to provide a method for detecting the safety of charging connections for electrical equipment. Another object of the present invention is to provide a system for detecting the safety of charging connections for electrical equipment. Another object of the present invention is to provide a computer device. Another object of the present invention is to provide a readable medium.

[0004] In order to achieve the above objectives, the present invention discloses a device for detecting charging connection safety of an electric device, the device comprising:

[0005] a signal generating module, configured to send a pulse signal to a first diode of the electrical device and detect changes in the pulse signal to obtain a detection signal;

[0006] A voltage detection module, configured to perform voltage detection on the detection signal to obtain a sampling signal;

[0007] A control module is used to obtain a negative voltage peak value of the detection signal according to the duty cycle of the pulse signal and the sampling signal, and to determine whether the electrical device is safely connected for charging according to the negative voltage peak value.

[0008] The present invention also discloses an electric equipment charging system, comprising the electric equipment charging connection safety detection device and the electric equipment as described above.

[0009] The present invention also discloses a method for detecting the safety of charging connection of an electric device, the method comprising:

[0010] Sending a pulse signal to a first diode of an electrical device, and detecting a change in the pulse signal to obtain a detection signal;

[0011] Performing voltage detection on the detection signal to obtain a sampling signal;

[0012] A negative voltage peak value of the detection signal is obtained according to the duty cycle of the pulse signal and the sampling signal, and whether the electrical device is safely connected for charging is determined according to the negative voltage peak value.

[0013] The present invention also discloses a charging connection safety detection system for electric equipment, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method described above is implemented.

[0014] The present invention also discloses a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor.

[0015] When the processor executes the program, the method described above is implemented.

[0016] The present invention also discloses a computer readable medium having a computer program stored thereon.

[0017] When the program is executed by a processor, the above-mentioned method is implemented.

[0018] The present invention sends a pulse signal to the first diode connected to the control device of the electrical device, and obtains a detection signal by detecting the change of the pulse signal passing through the first diode. If the electrical device is charged and connected normally, the positive voltage of the pulse signal flows normally through the first diode and inputs the control device. At this time, the control device participates in voltage division, and the positive voltage of the forward voltage changes, while the first diode is cut off under the negative voltage input of the pulse signal, indicating that the negative voltage of the pulse signal remains unchanged. If the electrical device is not charged and connected normally, the first diode is short-circuited, so that the control device will participate in voltage division at both the positive voltage and the negative voltage, so that both the positive voltage and the negative voltage of the pulse signal will change. Based on this, the present invention detects the negative voltage of the detection signal through the voltage detection module to obtain a sampling signal, and further obtains the change of the negative voltage of the output pulse signal through the sampling signal and the duty cycle of the pulse signal. It is determined whether the first diode is short-circuited based on the peak value of the negative voltage of the pulse signal, and then it can be determined whether the electrical device has been safely charged and connected, thereby ensuring the safety and reliability of the charging process of the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram showing a charging connection of an electric device in the prior art;

[0021] Figure 2 A structural diagram showing a specific embodiment of the device for detecting charging connection safety of an electric device according to the present invention;

[0022] Figure 3 A structural diagram showing a specific embodiment of the device for detecting charging connection safety of an electric device according to the present invention, including a duty cycle detection module;

[0023] Figure 4 A circuit diagram showing a duty cycle detection module of a specific embodiment of the device for detecting charging connection safety of an electrical device according to the present invention;

[0024] Figure 5 A structural diagram showing a voltage detection module of a specific embodiment of the device for detecting charging connection safety of an electric device according to the present invention;

[0025] Figure 6 A structural diagram showing a reverse unit of a specific embodiment of the device for detecting charging connection safety of an electric device according to the present invention;

[0026] Figure 7 A circuit diagram showing a reverse unit and a voltage detection unit in a specific embodiment of a device for detecting charging connection safety of an electrical device according to the present invention;

[0027] Figure 8 A circuit diagram showing a sampling unit of a specific embodiment of the device for detecting charging connection safety of an electric device according to the present invention;

[0028] Figure 9 An application flow chart showing a specific example of the device for detecting charging connection safety of an electric device according to the present invention;

[0029] Figure 10 A flowchart showing a specific embodiment of a method for detecting charging connection safety of an electric device according to the present invention;

[0030] Figure 11 A flowchart showing a specific embodiment S110 of the method for detecting charging connection safety of an electric device according to the present invention is shown;

[0031] Figure 12A flowchart showing a specific embodiment S111 of the method for detecting charging connection safety of an electric device according to the present invention;

[0032] Figure 13 A flowchart illustrating a specific embodiment S200 of a method for detecting charging connection safety of an electric device according to the present invention is shown;

[0033] Figure 14 A flowchart illustrating a specific embodiment S210 of the method for detecting charging connection safety of an electric device according to the present invention is shown;

[0034] Figure 15 A flowchart illustrating a specific embodiment S211 of the method for detecting charging connection safety of an electric device according to the present invention;

[0035] Figure 16 A flowchart illustrating a specific embodiment S300 of a method for detecting charging connection safety of an electric device according to the present invention is shown;

[0036] Figure 17 A schematic structural diagram of a computer device suitable for implementing an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] In the prior art, various electrical devices typically require charging via external charging devices. For example, with the increasing popularity of new energy vehicles (NEVs), charging safety during charging of NEVs (electric vehicles) has become a growing concern. Charging guns have become essential charging tools for EVs, and secure and reliable connection and communication between the charging gun and the EV are prerequisites for safe charging. Electric vehicles are equipped with a central control device that can be connected to modules or components, such as an onboard charger, to control the operation of each module or component within the EV to ensure normal operation. If an EV is not securely connected to the charging gun, this can damage the vehicle's control device or cause a short circuit. This charging can potentially burn out important components of the vehicle, causing significant economic losses and, in severe cases, casualties. Therefore, ensuring safe charging connections for EVs is an urgent issue. Therefore, the present invention provides a method for detecting the safe charging connection of an EV. This method connects the EV control device to the cathode terminal of a first diode D1 to prevent negative voltage from entering the control device and damaging it. Furthermore, a pulse signal is input to the anode of the first diode D1, and changes in the negative voltage of the pulse signal are detected to monitor whether the EV is securely connected.

[0039] According to one aspect of the present invention, this embodiment discloses a device for detecting safety of charging connection of an electric device. In a specific example, Figure 1 As shown, the electrical equipment includes a control device and a first diode D1, and the cathode end of the first diode D1 is connected to the control device. The control device mainly plays a central control role and can be connected with other modules or devices of the electrical equipment to control the working process of each module or device in the electrical equipment to achieve normal operation of the electrical equipment. Figure 2 As shown, the detection device includes a signal generating module 11 , a voltage detecting module 13 and a control module 14 .

[0040] The signal generation module 11 is configured to send a pulse signal to the first diode D1 of the electrical device and detect changes in the pulse signal to obtain a detection signal. The voltage detection module 13 is configured to perform voltage detection on the detection signal to obtain a sampling signal. The control module 14 is configured to determine the negative voltage peak of the detection signal based on the duty cycle of the pulse signal and the sampling signal, and to determine whether the electrical device is securely connected for charging based on the negative voltage peak.

[0041] The present invention sends a pulse signal to the first diode D1 connected to the control device of the electrical device, and obtains a detection signal by detecting the change of the pulse signal passing through the first diode D1. If the electrical device is normally charged and connected, the forward voltage of the pulse signal flows normally through the first diode D1 and is input into the control device. At this time, the control device participates in voltage division, and the forward voltage of the forward voltage changes, while the first diode D1 is cut off at the negative voltage of the pulse signal, indicating that the negative voltage of the pulse signal remains unchanged. If the electrical device is not normally charged and connected, the first diode D1 is short-circuited, so that the control device will participate in voltage division at both positive and negative voltages, so that the forward voltage and the sum of the pulse signal will change. Based on this, the present invention detects the negative voltage of the detection signal through the voltage detection module 13 to obtain a sampling signal, and further obtains the change of the negative voltage of the output pulse signal through the sampling signal and the duty cycle of the pulse signal. According to the peak value of the negative voltage of the pulse signal, it is determined whether the first diode D1 is short-circuited, and then it can be determined whether the electrical device has been safely charged and connected, ensuring the safety and reliability of the charging process of the electrical device.

[0042] In a preferred embodiment, Figure 3 As shown, the safety detection device further includes a duty cycle detection module 12, which is used to obtain the duty cycle of the detection signal by detecting the voltage change of the detection signal, that is, to obtain the duty cycle of the pulse signal.

[0043] It can be understood that in this preferred embodiment, in order to simplify the circuit for detecting the negative voltage of the detection signal and save costs, the detection signal is divided into two paths for processing, one path detects the duty cycle of the detection signal, and the other path detects the voltage of the detection signal to obtain a sampling signal. Finally, the negative voltage peak of the detection signal is obtained based on the duty cycle of the detection signal obtained by the two processing paths and the sampling signal representing the negative voltage.

[0044] In a preferred embodiment, the duty cycle detection module 12 is configured to output an interrupt signal corresponding to the duty cycle when the detection signal exceeds a preset threshold. Specifically, the current of the pulse signal changes direction, causing the pulse signal to undergo a process of shifting from a positive voltage to zero voltage and then to a negative voltage. By setting a preset threshold, when the detection signal exceeds the preset threshold, the pulse signal enters a new change cycle. Thus, by determining the number and time interval of interrupt signals within a preset time period, the frequency of the pulse signal and the duration of the negative voltage can be determined.

[0045] As a preferred embodiment, the duty cycle detection module 12 includes a first switching element and at least one resistor, and the preset threshold is the conduction threshold voltage of the first switching element, that is, the voltage change of the detection signal can be determined by whether the first switching element is on or off, thereby obtaining an interrupt signal corresponding to the duty cycle of the detection signal. In a specific example, the duty cycle detection module can be implemented through a specific circuit structure. Figure 4 As shown, the duty cycle detection module 12 includes a first power supply terminal VCC1, a first resistor R1, a second resistor R2, a third resistor R3 and a first switch element Q1.

[0046] The first end of the first resistor R1 is used to receive the detection signal, and the second end is connected to the control end of the first switching element Q1. The first end of the second resistor R2 is connected to the first power supply terminal VCC1, and the second end is connected to the first end of the first switching element Q1 and the first end of the third resistor R3, respectively. The second end of the first switching element Q1 is connected to the ground terminal GND. The second end of the third resistor R3 is connected to the signal output terminal for outputting the interrupt signal.

[0047] It can be understood that when the detection signal is greater than the turn-on threshold voltage of the first switching element Q1, the first switching element Q1 conducts between the first terminal and the ground terminal GND, thereby lowering the voltage at the first terminal of the first switching element Q1 and causing the signal output terminal to output a low-level interrupt signal. When the detection signal is lower than the turn-on threshold voltage of the first switching element Q1, the first switching element Q1 disconnects the first and second terminals, causing the signal output terminal to output a high-level interrupt signal. By detecting changes in the interrupt signal, the frequency of the detection signal can be determined, and the duration of the negative voltage of the detection signal can be calculated to obtain the duty cycle of the detection signal. The first resistor R1, the second resistor R2, and the third resistor R3 further act as a voltage control to protect the first switching element Q1. In a specific example, the first switching element Q1 can be an NMOS transistor, which conducts when the detection signal is high. The duration of the positive voltage of the detection signal can be determined based on the conduction time of the first switching element Q1. In other embodiments, the first switch element Q1 may also be a PMOS transistor or other switch elements. The technical solution of the duty cycle detection module 12 can be realized by improving the adaptability of the circuit and should be within the protection scope of the present invention.

[0048] In a preferred embodiment, the voltage detection module is configured to perform negative voltage detection on the detection signal to obtain a sampling signal. It is understood that the negative voltage of the pulse signal varies differently when the electrical device is safely or unsafely connected for charging. By sampling the negative voltage of the detection signal and combining it with the duty cycle of the detection signal, the negative peak voltage of the detection signal during the negative voltage phase can be obtained.

[0049] In a preferred embodiment, Figure 5 As shown, the voltage detection module 13 includes an inverting unit 131 , a voltage detection unit 132 and a sampling unit 133 .

[0050] The reverse unit 131 is used to perform reverse processing on the detection signal to obtain a reverse signal. The voltage detection unit 132 is used to perform voltage detection on the reverse signal to obtain a negative voltage. The sampling unit 133 is used to sample the negative voltage to obtain a sampling signal.

[0051] Specifically, to acquire the negative voltage of the detection signal and determine the negative peak voltage, the detection signal is inverted by the inverting unit 131. Then, the positive voltage of the inverted detection signal is intercepted by the voltage detection unit 132 to obtain the negative voltage of the detection signal. Finally, the intercepted negative voltage is sampled by the acquisition unit to obtain a sampled signal, and the negative peak voltage of the detection signal can be further determined based on the duty cycle of the detection signal.

[0052] In a preferred embodiment, Figure 6 As shown, the reverse unit 131 includes a filtering subunit 1311 and a reverse subunit 1312. The filtering subunit 1311 is used to perform high-frequency filtering on the detection signal. The reverse subunit 1312 is used to perform reverse processing on the detection signal after high-frequency filtering to obtain a reverse signal.

[0053] It is understood that, in order to enhance electromagnetic compatibility (EMC), a filtering subunit 1311 may be preferably added to improve the circuit's anti-interference capability and meet EMC testing requirements. After filtering the detection signal, the filtered signal is connected to the reverse subunit 1312, which performs reverse processing on the filtered detection signal to obtain a reverse signal.

[0054] In a specific example, the filtering subunit 1311 can be implemented by a specific circuit structure. Figure 7 As shown, the filtering sub-unit 1311 includes a first inductor L1, a fourth resistor R4 and a fifth resistor R5.

[0055] The first end of the first inductor L1 is connected to the anode end of the first diode D1, and the second end is connected to the first end of the fourth resistor R4. The second end of the fourth resistor R4 is connected to the fifth resistor R5 and the reverse sub-unit, respectively, to transmit the high-frequency filtered detection signal to the reverse sub-unit. The second end of the fifth resistor R5 is connected to the ground terminal GND.

[0056] In a specific example, Figure 7 As shown, the reverse subunit 1312 can be implemented through a specific circuit structure. Figure 5 As shown, the inverting subunit 1312 includes a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9 and a first amplifier M1.

[0057] A first end of a sixth resistor R6 is connected to the filter subunit for receiving the high-frequency filtered detection signal. A second end of the sixth resistor R6 is connected to the inverting input terminal of the first amplifier M1 and the first end of the eighth resistor R8, respectively. A first end of the seventh resistor R7 is connected to the non-inverting input terminal of the first amplifier M1, and a second end is connected to the ground terminal GND.

[0058] The second end of the eighth resistor R8 is connected to the output end of the first amplifier M1. The first end of the ninth resistor R9 is connected to the second end of the eighth resistor R8 and the output end of the first amplifier M1, respectively, and the second end is connected to the voltage detection unit 132 for transmitting the reverse signal to the voltage detection unit 132.

[0059] It will be appreciated that, in order to enhance EMC, an EMC filter circuit comprising a first inductor L1, a fourth resistor R4, and a fifth resistor R5 is added in this specific example to improve the circuit's anti-interference capability and meet EMC testing requirements. After filtering the detection signal, the filtered signal is connected to the inverting input of the first amplifier M1. The first amplifier M1 inverts the filtered detection signal and outputs it proportionally. The amplification or reduction ratio can be determined by designing the resistance parameters of components such as the sixth resistor R6 and the eighth resistor R8. This is a conventional technical approach in the art and will not be further elaborated here.

[0060] In a specific example, the voltage detection unit 132 can be implemented by a specific circuit structure. Figure 7 As shown, the voltage detection unit 132 includes a second amplifier M2, a tenth resistor R10, an eleventh resistor R11, a first capacitor C1 and a third amplifier M3.

[0061] The inverting input terminal of the second amplifier M2 is connected to the inverting unit 131 and is configured to receive the inverting signal output by the inverting unit 131. The signal output terminal of the second amplifier M2 is connected to the first end of the tenth resistor R10. The second end of the tenth resistor R10 is connected to the first end of the eleventh resistor R11, the first end of the first capacitor C1, and the inverting input terminal of the third amplifier M3, respectively. The non-inverting input terminal of the third amplifier M3 is connected to the ground terminal GND. The signal output terminal of the third amplifier M3 is configured to output the negative voltage and is connected to the second end of the eleventh resistor R11, the second end of the first capacitor C1, and the non-inverting input terminal of the second amplifier M2, respectively.

[0062] It is understandable that the voltage detection unit 132 can intercept the positive voltage of the inverted signal output by the inverting unit 131 through the second amplifier M2 and the third amplifier M3 to obtain a negative voltage.

[0063] In a specific example, the sampling unit 133 can be implemented by a specific circuit structure. Figure 8 As shown, the sampling unit 133 includes a second diode D2, a twelfth resistor R12, a thirteenth resistor R13 and an analog-to-digital converter ADC.

[0064] The cathode of the second diode D2 and the first end of the twelfth resistor R12 are respectively connected to the voltage detection unit 132 for receiving the negative voltage. The anode of the second diode D2 and the second end of the thirteenth resistor R13 are respectively connected to the ground terminal GND. The first end of the thirteenth resistor R13 is respectively connected to the second end of the twelfth resistor R12 and the signal input terminal of the analog-to-digital converter ADC. The signal output terminal of the analog-to-digital converter ADC is connected to the control module 14 for converting the analog sampling signal into a digital sampling signal and outputting it.

[0065] In this preferred embodiment, a voltage shunt is added to meet the voltage requirements of the analog-to-digital converter (ADC). The second diode D2 can filter out negative input voltages, and the twelfth resistor R12 and the thirteenth resistor R13 can divide the voltage to prevent the peak of the negative input voltage from damaging the voltage sampling interface of the analog-to-digital converter (ADC), thereby better protecting the analog-to-digital converter (ADC).

[0066] In a preferred embodiment, the control module 14 is used to determine the frequency of the pulse signal based on the duty cycle, and obtain the negative voltage peak of the detection signal based on the frequency and the sampling signal. If the voltage peak is less than the preset voltage value, the electrical device is not safely charged and connected.

[0067] Specifically, in one embodiment, the device for detecting the safety of charging connection of an electric device sends a pulse signal of ±12V to the anode of the first diode D1. Figure 1 When the pulse signal passes through detection point 1, the signal changes. The safety detection device collects the changes in the pulse signal to generate a detection signal. When the first diode D1 is short-circuited, the detection signal voltage detected at detection point 1 should be ±6V. When the first diode D1 is properly connected, the detection signal voltage detected at detection point 1 should be between +6V and -12V. This is because the negative voltage of the pulse signal is blocked by the diode, and the electric vehicle's control device does not participate in the negative voltage division. When the diode is disconnected, the voltage detected at detection point 1 should be ±12V. Through circuit structure and parameter design, when the negative voltage of the detection signal is -6V, the peak negative voltage collected and calculated is 1V. Therefore, when the negative voltage peak value detected by the control module 14 is greater than 1V, it indicates that the first diode D1 is present and the charging gun is properly connected to the electric vehicle's control device. When the negative voltage peak value detected by the control module 14 is less than or equal to 1V, it indicates that the first diode D1 is short-circuited and the charging gun may not be properly connected to the electric vehicle's control device. The control module 14 of the safety detection device outputs a pulse signal to the first diode D1 and detects changes in the pulse signal to determine whether the electrical device and the charging system are normally and safely connected. It can further control the charging process based on the detection result of the charging safety connection to ensure the safety of the electrical device during the charging process.

[0068] The charging connection safety detection device for electrical equipment of the present invention has strong anti-interference capabilities and has passed EMC testing. Furthermore, the circuit structure of the present invention uses few components, has a simple interface, is easy to collect, and is low in cost, making it highly competitive in the market. Furthermore, the safety detection device of the present invention has good consistency and stability, and is highly cost-effective.

[0069] The present invention will be further described below through a specific example. Figure 9 As shown, a detection signal is acquired from detection point 1 via a signal generation module 11. A duty cycle detection module 12 detects voltage changes in the detection signal and outputs an interrupt signal representing the duty cycle of the detection signal. Upon receiving the interrupt signal, the control module 14 triggers an interrupt and begins timing. The voltage detection module 13 then performs negative voltage detection on the detection signal to generate a sampling signal. When the interrupt triggering reaches a preset number N, the duty cycle of the detection signal and the average value of the ADC sampling signal are calculated based on the interrupt signal and the sampling signal. Finally, the negative peak voltage of the detection signal is determined based on the duty cycle and the average value of the sampling signal. This negative peak voltage can be used to determine whether the electrical device is connected to the charging system for charging.

[0070] Based on the same principle, this embodiment also discloses a charging system for an electric device, which includes the electric device charging connection safety detection device as described in this embodiment and an electric device.

[0071] Since the principle of solving the problem of this system is similar to that of the above device, the implementation of this system can refer to the implementation of the device and will not be repeated here.

[0072] Based on the same principle, this embodiment also discloses a method for detecting the safety of charging connection of an electric device. The electric device includes a control device and a first diode D1, and the cathode end of the first diode D1 is connected to the control device. Figure 10 As shown, the method includes:

[0073] S100: Sending a pulse signal to the first diode D1 of the electrical device, and detecting changes in the pulse signal to obtain a detection signal.

[0074] S200: Perform voltage detection on the detection signal to obtain a sampling signal.

[0075] S300: Obtaining a negative voltage peak value of a detection signal according to the duty cycle of the pulse signal and the sampling signal, and determining whether the electrical device is safely connected for charging according to the negative voltage peak value.

[0076] In a preferred embodiment, Figure 11 As shown, the method further comprises:

[0077] S110: Obtaining a duty cycle of the detection signal by detecting a voltage change of the detection signal.

[0078] like Figure 12 As shown, the step S110 of obtaining the duty cycle of the detection signal by detecting the voltage change of the detection signal specifically includes:

[0079] S111: When the detection signal reaches a preset threshold or above, an interrupt signal corresponding to the duty cycle is output.

[0080] In a preferred embodiment, Figure 13 As shown, the step S200 of performing voltage detection on the detection signal to obtain a sampling signal specifically includes:

[0081] S210: Perform negative voltage detection on the detection signal to obtain a sampling signal.

[0082] In a preferred embodiment, Figure 14 As shown, S210 performs negative voltage detection on the detection signal to obtain a sampling signal, specifically including:

[0083] S211: Perform reverse processing on the detection signal to obtain a reverse signal.

[0084] S212: Perform voltage detection on the reverse signal to obtain a negative voltage.

[0085] S213: Sampling the negative voltage to obtain a sampling signal.

[0086] In a preferred embodiment, Figure 15 As shown, S211 performs reverse processing on the detection signal to obtain a reverse signal, specifically including:

[0087] S2111: Perform high-frequency filtering on the detection signal.

[0088] S2112: Perform reverse processing on the detection signal after high-frequency filtering to obtain a reverse signal.

[0089] In a preferred embodiment, Figure 16 As shown, the step S300 obtains a negative voltage peak value of the detection signal according to the duty cycle and the sampling signal, and determines whether the electrical device is safely connected for charging according to the negative voltage peak value, specifically including:

[0090] S310: Determine the frequency of the pulse signal according to the duty cycle, and obtain a negative voltage peak of the detection signal according to the frequency and the sampling signal. If the voltage peak is less than a preset voltage value, the electrical device is not safely connected for charging.

[0091] Since the principle of solving the problem by this method is similar to that of the above device, the implementation of this method can refer to the implementation of the device and will not be repeated here.

[0092] This embodiment also discloses a charging connection safety detection system for an electric device. The safety detection system includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method described in this embodiment is implemented.

[0093] Since the principle of solving the problem of this system is similar to that of the above device, the implementation of this system can refer to the implementation of the device and will not be repeated here.

[0094] The systems, devices, modules, or units described in the above embodiments may be implemented by computer chips or entities, or by products having certain functions. A typical implementation device is a computer device. Specifically, the computer device may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0095] In a typical example, a computer device specifically includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method described above is implemented.

[0096] Reference below Figure 17 , which shows a structural diagram of a computer device 600 suitable for implementing an embodiment of the present application.

[0097] like Figure 17 As shown, computer device 600 includes a central processing unit (CPU) 601, which can perform various appropriate tasks and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage portion 608 into a random access memory (RAM) 603. Various programs and data required for the operation of system 600 are also stored in RAM 603. CPU 601, ROM 602, and RAM 603 are connected to each other via a bus 604. An input / output (I / O) interface 605 is also connected to bus 604.

[0098] The following components are connected to the I / O interface 605: an input section 606 including a keyboard, a mouse, and the like; an output section 607 including devices such as a cathode ray tube (CRT), a liquid crystal display (LCD), and a speaker; a storage section 608 including devices such as a hard disk; and a communication section 609 including a network interface card such as a LAN card or a modem. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I / O interface 605 as needed. Removable media 611, such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, is installed in the drive 610 as needed, so that computer programs read therefrom can be installed in the storage section 608 as needed.

[0099] In particular, according to embodiments of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program tangibly embodied on a machine-readable medium, the computer program including program code for executing the methods illustrated in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication portion 609 and / or installed from removable media 611.

[0100] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0101] For the convenience of description, the above devices are described as being divided into various units according to their functions. Of course, when implementing this application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0102] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0103] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0104] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0105] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0106] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0107] The present application may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communications network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0108] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0109] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A device for detecting the safety of charging connection of an electric device, characterized in that: The detection device comprises: a signal generating module, configured to send a pulse signal to a first diode of the electrical device and detect changes in the pulse signal to obtain a detection signal; A voltage detection module, configured to perform voltage detection on the detection signal to obtain a sampling signal; a control module, configured to obtain a negative voltage peak value of the detection signal based on the duty cycle of the pulse signal and the sampling signal, and determine whether the electrical device is safely connected for charging based on the negative voltage peak value; Wherein, the voltage detection module includes an inverting unit, a voltage detection unit and a sampling unit; The reverse unit is used to perform reverse processing on the detection signal to obtain a reverse signal; The voltage detection unit is used to perform voltage detection on the reverse signal to obtain a negative voltage; The sampling unit is used to sample the negative voltage to obtain a sampling signal.

2. The device for detecting charging connection safety of an electric device according to claim 1, characterized in that: The electrical device includes a control device and a first diode, wherein a cathode end of the first diode is connected to the control device.

3. The device for detecting charging connection safety of an electric device according to claim 1, characterized in that: It further includes a duty cycle detection module, which is used to obtain the duty cycle of the detection signal by detecting the voltage change of the detection signal.

4. The device for detecting charging connection safety of an electric device according to claim 3, characterized in that: The duty cycle detection module is configured to output an interrupt signal corresponding to the duty cycle when the detection signal reaches a preset threshold value or above.

5. The device for detecting charging connection safety of electric equipment according to claim 4, characterized in that: The duty cycle detection module includes a first switch element and at least one resistor, and the preset threshold is a turn-on threshold voltage of the first switch element.

6. The device for detecting charging connection safety of an electric device according to any one of claims 3 to 5, characterized in that: The duty cycle detection module includes a first power supply terminal, a first resistor, a second resistor, a third resistor and a first switch element; The first end of the first resistor is used to receive the detection signal, and the second end is connected to the control end of the first switch element; The first end of the second resistor is connected to the first power supply end, and the second end is connected to the first end of the first switching element and the first end of the third resistor respectively; The second end of the first switching element is connected to the ground end; The second end of the third resistor is connected to the signal output end that outputs the interrupt signal.

7. The device for detecting charging connection safety of electric equipment according to claim 1, characterized in that: The voltage detection module is used to perform negative voltage detection on the detection signal to obtain a sampling signal.

8. The device for detecting charging connection safety of an electric device according to claim 1, characterized in that: The reverse unit includes a filtering subunit and a reverse subunit; The filtering subunit is used to perform high-frequency filtering on the detection signal; The reverse subunit is used to perform reverse processing on the detection signal after high-frequency filtering to obtain a reverse signal.

9. The device for detecting charging connection safety of an electric device according to claim 8, characterized in that: The filtering subunit includes a first inductor, a fourth resistor and a fifth resistor; The first end of the first inductor is connected to the anode end of the first diode, and the second end of the first inductor is connected to the first end of the fourth resistor; The second end of the fourth resistor is connected to the fifth resistor and the reverse sub-unit respectively, and transmits the high-frequency filtered detection signal to the reverse sub-unit; The second end of the fifth resistor is connected to the ground.

10. The device for detecting charging connection safety of electric equipment according to claim 8, characterized in that: The inverting subunit includes a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor and a first amplifier; The first end of the sixth resistor is connected to the filtering subunit, and is used to receive the detection signal after high-frequency filtering; The second end of the sixth resistor is connected to the inverting input end of the first amplifier and the first end of the eighth resistor respectively; A first end of the seventh resistor is connected to the non-inverting input terminal of the first amplifier, and a second end thereof is connected to the ground terminal; The second end of the eighth resistor is connected to the output end of the first amplifier; The first end of the ninth resistor is connected to the second end of the eighth resistor and the output end of the first amplifier respectively, and the second end is connected to the voltage detection unit for transmitting the reverse signal to the voltage detection unit.

11. The device for detecting charging connection safety of an electric device according to claim 1, characterized in that: The voltage detection unit includes a second amplifier, a tenth resistor, an eleventh resistor, a first capacitor and a third amplifier; An inverting input terminal of the second amplifier is connected to the inverting unit for receiving an inverting signal output by the inverting unit, and a signal output terminal of the second amplifier is connected to the first terminal of the tenth resistor; The second end of the tenth resistor is connected to the first end of the eleventh resistor, the first end of the first capacitor, and the inverting input end of the third amplifier respectively; The non-inverting input terminal of the third amplifier is connected to the ground terminal, and the signal output terminal of the third amplifier is used to output the negative voltage, and is respectively connected to the second end of the eleventh resistor, the second end of the first capacitor and the non-inverting input terminal of the second amplifier.

12. The device for detecting charging connection safety of an electric device according to claim 1, characterized in that: The sampling unit includes a second diode, a twelfth resistor, a thirteenth resistor and an analog-to-digital converter; The cathode tube of the second diode and the first end of the twelfth resistor are respectively connected to the voltage detection unit for receiving the negative voltage; An anode terminal of the second diode and a second terminal of the thirteenth resistor are connected to the ground terminal respectively; The first end of the thirteenth resistor is connected to the second end of the twelfth resistor and the signal input end of the analog-to-digital converter respectively; The signal output end of the analog-to-digital converter is connected to the control module, and is used to convert the analog sampling signal into a digital sampling signal and output the digital sampling signal.

13. The device for detecting charging connection safety of an electric device according to claim 1, characterized in that: The control module is used to determine the frequency of the pulse signal according to the duty cycle, and obtain the negative voltage peak of the detection signal according to the frequency and the sampling signal. If the voltage peak is less than a preset voltage value, the electrical device is not safely charged.

14. A charging system for an electric device, characterized in that: It comprises the electrical equipment charging connection safety detection device and the electrical equipment as described in any one of claims 1 to 13.

15. A method for detecting charging connection safety of an electric device, characterized in that: The method comprises: Sending a pulse signal to a first diode of an electrical device, and detecting a change in the pulse signal to obtain a detection signal; Performing voltage detection on the detection signal to obtain a sampling signal; Obtaining a negative voltage peak value of the detection signal according to the duty cycle of the pulse signal and the sampling signal, and determining whether the electrical device is safely connected for charging according to the negative voltage peak value; The step of performing voltage detection on the detection signal to obtain a sampling signal specifically includes: Performing negative voltage detection on the detection signal to obtain a sampling signal; The performing negative voltage detection on the detection signal to obtain a sampling signal specifically includes: Performing reverse processing on the detection signal to obtain a reverse signal; Performing voltage detection on the reverse signal to obtain a negative voltage; The negative voltage is sampled to obtain a sampling signal.

16. The method for detecting charging connection safety of an electric device according to claim 15, characterized in that: Further including: The duty cycle of the detection signal is obtained by detecting the voltage change of the detection signal.

17. The method for detecting charging connection safety of an electric device according to claim 16, wherein: The step of obtaining the duty cycle of the detection signal by detecting the voltage change of the detection signal specifically includes: When the detection signal reaches a preset threshold value or above, an interrupt signal corresponding to the duty cycle is output.

18. The method for detecting charging connection safety of an electric device according to claim 15, wherein: The reverse processing of the detection signal to obtain the reverse signal specifically includes: performing high-frequency filtering on the detection signal; The detection signal after high-frequency filtering is reversely processed to obtain a reverse signal.

19. The method for detecting charging connection safety of an electric device according to claim 15, wherein: Obtaining a negative voltage peak value of the detection signal according to the duty cycle of the pulse signal and the sampling signal, and determining whether the electrical device is safely connected for charging according to the negative voltage peak value specifically includes: The frequency of the pulse signal is determined according to the duty cycle, and the negative voltage peak of the detection signal is obtained according to the frequency and the sampling signal. If the voltage peak is less than a preset voltage value, the electrical device is not safely charged.

20. A charging connection safety detection system for an electric device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the method according to any one of claims 15 to 19 is implemented.

21. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method according to any one of claims 15 to 19 is implemented.

22. A computer-readable medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 15 to 19 is implemented.

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