A rechargeable high-voltage tester circuit

Abstract

The utility model provides a kind of rechargeable high-pressure-resistant voltage tester circuit, it is related to voltage tester circuit technical field, including main circuit module, charging interface module, electrical isolation module, main circuit module is electrically connected with electrical isolation module, electrical isolation module is electrically connected with charging interface module;Main circuit module includes control module, rechargeable battery module, voltage test module, control module is electrically connected with electrical isolation module, voltage test module;When voltage test module detects external to-be-measured terminal voltage, control module is disconnected the electrical connection of main circuit module and charging interface module by electrical isolation module, prevent user from touching charging interface module to cause electric shock danger;The rechargeable high-pressure-resistant voltage tester circuit of the present application can effectively avoid user from being electrified when contacting metal interface.

Description

Technical Field

[0001] This utility model relates to the field of voltage tester circuit technology, and in particular to a rechargeable high-voltage resistant voltage tester circuit. Background Technology

[0002] Testing the voltage value of nodes in a circuit is a common function of electronic testing instruments, such as test pens, multimeters, and portable oscilloscopes, all of which need to detect the voltage value of the endpoints under test.

[0003] Here, we take a voltage tester as an example. Voltage testers are widely used to determine whether an object is charged, and there are generally two ways to do so:

[0004] 1. Contact type: By directly contacting the test circuit with the metal conductive terminal of the circuit under test, the voltage value of the terminal of the circuit under test can be directly measured. The value measured by the contact type test pen is relatively accurate.

[0005] 2. Non-contact type: This type uses a metal induction plate to detect electromagnetic fields in a non-contact manner, converting the electromagnetic field signal into a voltage signal. The voltage value is then determined through signal processing circuits and algorithms. However, currently, non-contact test pens cannot achieve precise measurements and can only make qualitative judgments.

[0006] For scenarios requiring precise voltage measurements, contact test pens are necessary. Existing contact test pens are all powered by dry-cell batteries. While dry-cell batteries offer higher safety, and the rest of the device (except for the metal contact head) can be encased in a plastic shell, dry-cell batteries are disposable, making them less environmentally friendly and economical.

[0007] If the power supply is made rechargeable (lithium battery), there will inevitably be an exposed metal charging port. When measuring high voltage, under the existing charging port principle, users are very likely to come into contact with the metal interface used for charging, which poses a risk of electric shock.

[0008] Therefore, it is necessary to propose a rechargeable high-voltage resistant voltage tester circuit to prevent users from getting electric shocks when they come into contact with metal interfaces. Utility Model Content

[0009] To address the aforementioned issues, this invention proposes a rechargeable, high-voltage resistant voltage tester circuit to prevent users from experiencing electric shock when touching metal interfaces.

[0010] This utility model is achieved through the following technical solution:

[0011] This utility model proposes a rechargeable high-voltage withstand voltage tester circuit, including a main circuit module, a charging interface module, and an electrical isolation module. The main circuit module is electrically connected to the electrical isolation module, and the electrical isolation module is electrically connected to the charging interface module. The main circuit module includes a control module, a rechargeable battery module, and a voltage testing module. The control module is electrically connected to the electrical isolation module and the voltage testing module.

[0012] When the voltage testing module detects the voltage of the external test terminal, the control module disconnects the electrical connection between the main circuit module and the charging interface module through the electrical isolation module to prevent the user from touching the charging interface module and causing an electric shock hazard.

[0013] Furthermore, the electrical isolation module includes an electronic control device and an isolation device. The control module is electrically connected to the electronic control device, and the electronic control device is electrically connected to the isolation device. The control module controls the isolation device to disconnect or connect via the electronic control device. The electronic control device is one or more combinations of MOSFETs, transistors, and analog switch chips. The isolation device is one or more combinations of optocoupler thyristors, optocoupler MOSFETs, relays, and transformers.

[0014] Furthermore, the charging interface module is any one of the following: Type-C USB interface, DC interface, Micro-USB interface, Type-A USB interface, Mini-USB interface, Type-B USB interface, Lightning interface, and magnetic interface.

[0015] Furthermore, the main circuit module also includes a battery management module, the electrical isolation module is electrically connected to the battery management module, the battery management module is electrically connected to the rechargeable battery module, and the battery management module adjusts the current of the rechargeable battery module during charging.

[0016] Furthermore, the main circuit module also includes a charging voltage detection module, which is electrically connected to the charging interface module and the control module. The charging voltage detection module measures the input voltage of the charging interface module. When the input voltage of the charging interface module is too high, the control module disconnects the main circuit module and the charging interface module through the electrical isolation module.

[0017] Furthermore, the charging voltage detection module includes a resistor voltage divider circuit and a differential operational amplifier circuit. The resistor voltage divider circuit is electrically connected to the charging interface module, the resistor voltage divider circuit is electrically connected to the differential operational amplifier circuit, and the differential operational amplifier circuit is electrically connected to the control module.

[0018] Furthermore, the main circuit module also includes an audible and visual alarm module. The control module is electrically connected to the audible and visual alarm module. The audible and visual alarm module includes an indicator light and a buzzer. The buzzer is electrically connected to the control module through a transistor. The control module controls the frequency of the alarm sound emitted by the buzzer by adjusting the PWM wave frequency.

[0019] Furthermore, the electronic control device is a MOSFET, the isolation device is an optocoupler thyristor, and the control module is electrically connected to the MOSFET. When the control module controls the MOSFET to conduct, the light-emitting diode in the optocoupler thyristor will turn on, and the pin at the output terminal of the optocoupler thyristor will also conduct.

[0020] The beneficial effects of this utility model are:

[0021] When testing an external terminal under test, the voltage testing module contacts the external terminal under test. The control module disconnects the electrical connection between the main circuit module and the charging interface module through the electrical isolation module, preventing the user from touching the charging interface module and causing electric shock. Even if the user touches the exposed metal interface of the charging interface module, no electric shock will occur. In summary, this rechargeable high-voltage resistant voltage tester circuit can effectively prevent the user from getting electric shock when touching the metal interface. Attached Figure Description

[0022] Figure 1 This is a circuit block diagram of one embodiment of the rechargeable high-voltage resistant voltage tester of this utility model.

[0023] Figure 2 This is a circuit block diagram of another embodiment of the rechargeable high-voltage resistant voltage tester circuit of this utility model;

[0024] Figure 3 This is a circuit block diagram of another embodiment of the rechargeable high-voltage resistant voltage tester circuit of this utility model;

[0025] Figure 4 This is a schematic diagram of the control module of the rechargeable high-voltage tester circuit of this utility model.

[0026] Figure 5 This is an internal circuit diagram of the battery management module of the rechargeable high-voltage tester circuit of this utility model.

[0027] Figure 6 This is the internal circuit diagram of the electrical isolation module of the rechargeable high-voltage tester of this utility model.

[0028] Figure 7This is a circuit diagram of the charging interface module of the rechargeable high-voltage resistant voltage tester of this utility model.

[0029] Figure 8 This is a circuit diagram for detecting the charging voltage of the rechargeable high-voltage resistant voltage tester of this utility model.

[0030] Figure 9 This is the internal circuit diagram of the power switch transformer module of the rechargeable high-voltage resistant voltage tester circuit of this utility model.

[0031] Figure 10 This is a circuit diagram of the voltage testing module of the rechargeable high-voltage resistant voltage tester of this utility model.

[0032] Figure 11 The circuit diagram shows the voltage test button module of the rechargeable high-voltage resistant voltage tester of this utility model.

[0033] Figure 12 The circuit diagram of the buzzer in the rechargeable high-voltage resistant voltage tester circuit of this utility model is shown.

[0034] Figure 13 The circuit diagram of the NTC circuit of the rechargeable high-voltage withstand voltage tester of this utility model is shown.

[0035] Figure 14 The circuit diagram of the TFT circuit of the rechargeable high-voltage resistant voltage tester of this utility model is shown.

[0036] Figure 15 The circuit diagram shows the operational amplifier voltage follower circuit of the rechargeable high-voltage resistant voltage tester of this utility model.

[0037] The attached figures are labeled as follows:

[0038] Main circuit module 1, control module 11, rechargeable battery module 12, voltage test module 13, battery management module 14, charging voltage detection module 15, resistor voltage divider circuit 151, differential operational amplifier circuit 152, charging interface module 2, electrical isolation module 3, electronic control device 31, isolation device 32. Detailed Implementation

[0039] To more clearly and completely illustrate the technical solution of this utility model, the following description, in conjunction with the accompanying drawings, will further explain this utility model.

[0040] Please refer to Figures 1-15This utility model proposes a rechargeable high-voltage withstand voltage tester circuit, including a main circuit module 1, a charging interface module 2, and an electrical isolation module 3. The main circuit module 1 is electrically connected to the electrical isolation module 3, and the electrical isolation module 3 is electrically connected to the charging interface module 2. The main circuit module 1 includes a control module 11, a rechargeable battery module 12, and a voltage testing module 13. The control module 11 is electrically connected to the electrical isolation module 3 and the voltage testing module 13. When the voltage testing module 13 detects the voltage of the external test terminal, the control module 11 disconnects the electrical connection between the main circuit module 1 and the charging interface module 2 through the electrical isolation module 3 to prevent the user from touching the charging interface module 2 and causing an electric shock hazard.

[0041] The charging interface module can be any one of the following: Type-C USB interface, DC interface, Micro-USB interface, Type-A USB interface, Mini-USB interface, Type-B USB interface, Lightning interface, or magnetic interface.

[0042] In this embodiment, the electrical isolation module 3 includes an electronic control device 31 and an isolation device 32. The control module 11 is electrically connected to the electronic control device 31, and the electronic control device 31 is electrically connected to the isolation device 32. The control module 11 controls the isolation device 32 to open or close through the electronic control device 31. The electronic control device 31 is one or more of a MOSFET, a transistor, or an analog switch chip. The isolation device 32 is one or more of an optocoupler thyristor, an optocoupler MOSFET, a relay, or a transformer.

[0043] In this embodiment, taking the charging interface module as a Type-C USB interface as an example, the control module 11 includes a main control chip U2, which can be a CW32F030C8T6. The CW32F030C8T6 is a 32-bit microcontroller based on the ARM Cortex-M0+ core. This chip uses an ARM Cortex-M0+ 32-bit core with a maximum clock frequency of 64MHz and supports single-cycle multiplication and hardware dividers. The voltage test module 13 is used to contact the external device under test and collect the voltage under test of the external device.

[0044] In another embodiment, reference is made to Figure 3 The main circuit module 1 also includes a battery management module 14. The electrical isolation module 3 is electrically connected to the battery management module 14. The battery management module 14 is electrically connected to the rechargeable battery module 12. The battery management module 14 adjusts the current of the rechargeable battery module 12 during charging.

[0045] In this embodiment, when testing the external test terminal, the voltage test module 13 contacts the external test terminal, and the control module 11 controls the electrical isolation module 3 to disconnect the battery management module 14 from the charging interface module 2. Even if the user touches the exposed metal interface of the charging interface module 2, no electric shock will occur.

[0046] refer to Figure 1 and Figure 5 In this embodiment, the battery management module 14 includes at least a management chip U4, which can be a TP4056_C725790. The electrical isolation module 3 includes an electronic controller 31 and an isolation device 32. The management chip U4 is electrically connected to the isolation device 32, and the isolation device 32 is electrically connected to the charging interface module 2. The control module 11 controls the electronic controller 31 to turn on or off, thereby controlling the isolation device 32 to turn on or off. The two output terminals of the isolation device 32 are respectively connected to the battery management module 14 and the charging interface module 2. When the two output terminals of the isolation device 32 are disconnected, the voltage between the two output terminals can withstand a high voltage of several thousand volts, while the voltage under test is generally only several hundred volts, thus ensuring the safety of the user.

[0047] Reference Figure 5 and Figure 6 In this embodiment, the electronic control device 31 is a MOSFET, the isolation device 32 is an optocoupler thyristor, and the control module 11 is electrically connected to the MOSFET. When the control module 11 controls the MOSFET to conduct, the light-emitting diode in the optocoupler thyristor will turn on, and the pins of the two output terminals of the optocoupler thyristor will also conduct.

[0048] Further, refer to Figure 6M1 is the first MOSFET, M2 is the second MOSFET, G1 is the first optocoupler thyristor (i.e., the first isolation device), and G2 is the second optocoupler thyristor (i.e., the second isolation device). Electronic control device 31 is a MOSFET switching circuit, including resistor R35, the first MOSFET, resistors R34, R33, R38, the second MOSFET, resistors R37, and R36. Isolation device 32 includes a first isolation device and a second isolation device. One end of resistor R35 is electrically connected to the source (S) of the first MOSFET and to the power supply VBAT terminal. The other end of resistor R35 and one end of resistor R34 are both electrically connected to the gate (G) of the first MOSFET and to the PF7 terminal of the main control chip U2. Specifically, the PF7 contact point is electrically connected to pin 36 of the main control chip U2. The drain (D) of the first MOSFET is electrically connected to one end of resistor R33, and the other end of resistor R33 is connected to pin 1 of the first isolation device. The pins are electrically connected. The other end of resistor R34 is electrically connected to pin 2 of the first isolation device and grounded. The output terminal VBUS1 of the first isolation device is electrically connected to the charging interface module. The output terminal VBUS2 of the first isolation device is electrically connected to the management chip U4. One end of resistor R38 is electrically connected to the source (S) of the second MOSFET and connected to the power supply VBAT terminal. The other end of resistor R38 and one end of resistor R37 are electrically connected to the gate (G) of the second MOSFET and to the PF7 terminal of the main control chip U2. That is, the PF7 contact point is electrically connected to the PF7 terminal of the main control chip U2. The main control chip U2 controls pin 36 to output a high or low level, thereby controlling the first and second MOSFETs in the electrical isolation module 3 to be turned on or off.

[0049] The management chip U4 uses the TP4056 charging chip, which is a constant current / constant voltage linear charger for single-cell lithium-ion batteries. It can continuously adjust the charging voltage and charging current according to the battery voltage, and use the size of an external resistor to control the charging current. There is a heat sink on the bottom to facilitate heat dissipation.

[0050] Because the Type-C interface is a metal charging port, under the existing charging port principle, when measuring high voltage, the human body may come into contact with the metal interface at the back, posing a risk of electric shock. Using an isolation device to isolate the Type-C port from the electrical connection with other modules, and using electronic control devices to control conduction and isolation, this embodiment uses an optocoupler thyristor. When the two output terminals (pins 4 and 6) of the optocoupler thyristor are disconnected, the two output terminals can withstand a high voltage of several thousand volts, while the voltage typically being tested is only several hundred volts, thus ensuring user safety.

[0051] In this embodiment, refer to Figure 6Both the first and second isolation devices are optocouplers-thyristors, model MOC3063S-TA1. When the first MOSFET is turned on, the LED (pins 1 and 2) in the optocoupler-thyristor isolation will turn on, and the output terminal (pins 4 and 6) of the optocoupler-thyristor isolation will also be turned on. When the first MOSFET is turned off, the LED (pins 1 and 2) in the optocoupler-thyristor isolation will turn off, and the output terminal (pins 4 and 6) of the optocoupler-thyristor isolation will also be disconnected.

[0052] Reference Figure 5 The battery management module 14 also includes a resistor R5, a capacitor C19, and a capacitor C20. One end of capacitor C19 and one end of capacitor C20 are electrically connected to pin 4 of the management chip U4 and to pin 4 of the first isolation device. The other end of capacitor C19 is electrically connected to the other end of capacitor C20 and grounded. One end of resistor R5 is electrically connected to pin 2 of the management chip U4. The other end of resistor R5, pin 1 of the management chip U4, and pin 3 of the management chip U4 are all grounded.

[0053] In this embodiment, pin 6 (VBUS1) of the first isolation device is electrically connected to pins A9 and B9 on the charging interface module 2, respectively. VBUS1 is the power supply voltage directly input by the USB charging cable, which does not pass through the isolation device and the main circuit, and is generally 5V.

[0054] In this embodiment, pin 6 of the second isolation device is connected to GND1. The charging interface module 2 is provided with pins A12, B12, A5, and B5. GND1 is electrically connected to pins A12 and B12 on the charging interface module 2, and pins A5 and B5 are connected in series with resistor R4 and electrically connected to pin GND1.

[0055] In this embodiment, pin 4 (VBUS2) of the first isolation device is electrically connected to pins 4 and 8 of the management chip U4, respectively; VBUS2 is the power supply voltage input to the isolation device and the main circuit, which is typically 5V.

[0056] In this embodiment, refer to Figure 5 The battery management module 14 also includes a capacitor C18, one end of which is electrically connected to pin 5 of the management chip U4, and the other end of which is grounded.

[0057] In this embodiment, reference Figure 6The first isolation device includes a first light-emitting diode (LED), with the positive terminal of the first LED serving as pin 1 of the first isolation device and electrically connected to resistor R33, and the negative terminal of the first LED serving as pin 2 of the first isolation device and electrically connected to resistor R34; the second isolation device includes a second LED, with the positive terminal of the second LED serving as pin 1 of the second isolation device and electrically connected to resistor R36, and the negative terminal of the second LED serving as pin 2 of the second isolation device and electrically connected to resistor R37.

[0058] Reference Figure 1 In another embodiment, based on the foregoing, the main circuit module 1 further includes a charging voltage detection module 15, which is electrically connected to the charging interface module 2 and the control module 11. The charging voltage detection module 15 measures the input voltage of the charging interface module 2. When the input voltage of the charging interface module 2 is too high, the control module 11 disconnects the main circuit module 1 and the charging interface module 2 through the electrical isolation module 3.

[0059] In this embodiment, reference Figure 1 and Figure 8 The charging voltage detection module 15 includes a resistor voltage divider circuit 151 and a differential operational amplifier circuit 152. The resistor voltage divider circuit 151 is electrically connected to the charging interface module 2, the resistor voltage divider circuit 151 is electrically connected to the differential operational amplifier circuit 152, and the differential operational amplifier circuit 152 is electrically connected to the control module 11.

[0060] Reference Figure 1 , Figure 10 and Figure 15 In this embodiment, the rechargeable high-voltage resistant voltage tester circuit also includes an operational amplifier voltage follower circuit, which is electrically connected to the voltage test module 13 and the control module 11 respectively.

[0061] Reference Figure 10 The voltage testing module 13 includes a detection probe, a diode D4, and multiple resistors for voltage division. The detection probe and the multiple resistors for voltage division are connected in series or parallel and then electrically connected to the operational amplifier voltage follower circuit and the negative terminal of diode D4, respectively. The positive terminal of diode D4 is grounded. The detection probe is... Figure 10 Points U3 and M are the detection points.

[0062] In this embodiment, refer to Figure 15The op-amp voltage follower circuit includes op-amp chip U7, model GS321-TR. The output terminal PIN2 of op-amp chip U7 is electrically connected to the main control chip U2. The main control chip U2 has a built-in ADC module, and the input and output voltages are the same. That is, the input voltage of the op-amp voltage follower circuit and the voltage test module 13 connection point PIN66 is equal to the output voltage of the output terminal PIN2 of op-amp chip U7. However, the input impedance of the voltage to be measured is reduced by the op-amp voltage follower circuit.

[0063] Reference Figure 10 The resistors used for voltage division include resistors R14, R15, R16, R17, R18, R19, and R20. The detection probe is electrically connected to one end of resistor R14. The other end of resistor R14 is electrically connected to one end of resistor R15. The other end of resistor R15 is electrically connected to one end of resistor R16. The other end of resistor R16 is electrically connected to one end of resistor R17. The other end of resistor R17 is electrically connected to one end of resistor R18 and one end of resistor R19. The other end of resistor R18 is electrically connected to one end of diode D4 and is also electrically connected to the op-amp voltage follower circuit. The other end of resistor R19 is electrically connected to one end of resistor R20. The other end of resistor R20 is grounded.

[0064] Resistors R14, R15, R16, and R17 are all 47MΩ resistors. In this embodiment, the voltage value at point M of the resistor to be measured can be calculated by connecting multiple 47MΩ resistors in series, plus the resistance ratio of resistors R19 (470KΩ) and R20 (330KΩ) in series.

[0065] Reference Figure 9 In this embodiment, the buck chip U5 is model ME6211C30M5G-N. The buck chip U5 is used to convert the battery voltage VBAT into VOUT3V0. VOUT3V0 is a 3V voltage, which is mainly used to power the main control MCU.

[0066] Reference Figure 9 In this embodiment, the rechargeable high-voltage tester circuit also includes a power switch transformer module, which is electrically connected to the control module 11. The power switch transformer module is used to start the automatic shutdown function if it is not woken up within a specified time.

[0067] Reference Figure 9 In this embodiment, when the entire tester circuit of this application is not used for a specified period of time, such as 5 minutes or 3 minutes, the control module 1 can control it to automatically power off and cut off the battery power supply to achieve the purpose of saving power.

[0068] Switch K1 is a power switch. When pressed, switch K1 automatically springs back to its original position; it is not a self-locking switch. When switch K1 is pressed, MOSFET Q2 conducts, connecting B+ and VBAT together. The B+ voltage is the voltage of the rechargeable lithium battery, and VBAT is connected to other parts of the tester circuit. The rechargeable lithium battery then powers the tester circuit, and the main control chip U2 also operates. When the main control chip U2 starts working, it sends a high-level signal to the PIN pin, turning on transistor Q1. When switch K1 is released and reset, MOSFET Q2 also conducts, ensuring power supply to the device. When the device is not used for a specified time, the main control chip U2 sends a low-level signal to the PIN pin, turning off transistor Q1 and disconnecting MOSFET Q2. This de-energizes the entire tester circuit, achieving power saving.

[0069] Reference Figure 13 In this embodiment, the rechargeable high-voltage tester circuit also includes an NTC circuit, namely a thermistor circuit, which is electrically connected to the NTC VCC pin and the NTC ADC pin of the main control chip U2.

[0070] Reference Figure 14 In this embodiment, the rechargeable high-voltage tester circuit also includes a TFT circuit, i.e., a display module circuit. The TFT circuit is used to display the measured voltage parameters and is electrically connected to the main control chip U2. The TFT circuit is a TFTLCD display and communicates via the SPI protocol.

[0071] In this embodiment, the main circuit module 1 also includes an audible and visual alarm module. The control module 11 is electrically connected to the audible and visual alarm module. The audible and visual alarm module includes an indicator light and a buzzer. The buzzer is electrically connected to the control module 11 through a transistor. The control module 11 controls the frequency of the alarm sound emitted by the buzzer by adjusting the frequency of the PWM wave.

[0072] Reference Figure 12 The buzzer is electrically connected to the control module 11. The buzzer circuit is a passive buzzer. The control module 11 can output a PWM wave of a certain frequency through PIN6. Through the current amplification effect of the transistor, the passive buzzer can be driven to work. When the voltage test module 13 detects a high voltage, the passive buzzer will emit a sharp sound. When the second highest voltage is detected, the passive buzzer will emit a lower frequency sound. By the different frequencies of the sound, the user is reminded of the magnitude and danger level of the test voltage.

[0073] Reference Figure 11In this embodiment, the rechargeable high-voltage withstand voltage tester circuit also includes a voltage test button module, which is electrically connected to the main control chip U2. The voltage test button module is used to detect whether button K3 is pressed. Pins 2 and 4 are disconnected, and pins 1 and 3 are disconnected. When button K3 is pressed, pins 1 and 3 are connected, and PIN5 can detect a low level. The main control chip U2 is a 32-bit microcontroller. PIN5 is the microcontroller's I / O port and can have a built-in pull-up resistor. If button K3 is not pressed, pins 1 and 3 are disconnected, and a high level will be detected.

[0074] Of course, there may be other implementations of this utility model. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model.

Claims

1. A rechargeable high-voltage withstand voltage tester circuit, characterized in that, It includes a main circuit module, a charging interface module, and an electrical isolation module. The main circuit module is electrically connected to the electrical isolation module, and the electrical isolation module is electrically connected to the charging interface module. The main circuit module includes a control module, a rechargeable battery module, and a voltage testing module. The control module is electrically connected to the electrical isolation module and the voltage testing module. When the voltage testing module detects the voltage of the external test terminal, the control module disconnects the electrical connection between the main circuit module and the charging interface module through the electrical isolation module to prevent the user from touching the charging interface module and causing an electric shock hazard.

2. The rechargeable high-voltage withstand voltage tester circuit according to claim 1, characterized in that, The electrical isolation module includes an electronic controller and an isolation device. The control module is electrically connected to the electronic controller, and the electronic controller is electrically connected to the isolation device. The control module controls the isolation device to disconnect or connect via the electronic controller.

3. The rechargeable high-voltage withstand voltage tester circuit according to claim 2, characterized in that, The electronic control device is one or more combinations of MOSFETs, transistors, and analog switch chips.

4. The rechargeable high-voltage withstand voltage tester circuit according to claim 2, characterized in that, The isolation device is one or more combinations of optocoupler thyristor, optocoupler MOSFET, relay, and transformer.

5. The rechargeable high-voltage withstand voltage tester circuit according to claim 1, characterized in that, The charging interface module can be any one of the following: Type-C USB interface, DC interface, Micro-USB interface, Type-A USB interface, Mini-USB interface, Type-B USB interface, Lightning interface, or magnetic interface.

6. The rechargeable high-voltage withstand voltage tester circuit according to claim 1, characterized in that, The main circuit module also includes a battery management module. The electrical isolation module is electrically connected to the battery management module, and the battery management module is electrically connected to the rechargeable battery module. The battery management module adjusts the current of the rechargeable battery module during charging.

7. The rechargeable high-voltage withstand voltage tester circuit according to claim 1, characterized in that, The main circuit module also includes a charging voltage detection module, which is electrically connected to the charging interface module and the control module. The charging voltage detection module measures the input voltage of the charging interface module. When the input voltage of the charging interface module is too high, the control module disconnects the main circuit module and the charging interface module through the electrical isolation module.

8. The rechargeable high-voltage withstand voltage tester circuit according to claim 7, characterized in that, The charging voltage detection module includes a resistor voltage divider circuit and a differential operational amplifier circuit. The resistor voltage divider circuit is electrically connected to the charging interface module, the resistor voltage divider circuit is electrically connected to the differential operational amplifier circuit, and the differential operational amplifier circuit is electrically connected to the control module.

9. The rechargeable high-voltage withstand voltage tester circuit according to claim 1, characterized in that, The main circuit module also includes an audible and visual alarm module. The control module is electrically connected to the audible and visual alarm module. The audible and visual alarm module includes an indicator light and a buzzer. The buzzer is electrically connected to the control module through a transistor. The control module controls the frequency of the alarm sound emitted by the buzzer by adjusting the PWM wave frequency.

10. The rechargeable high-voltage withstand voltage tester circuit according to claim 2, characterized in that, The electronic control device is a MOSFET, the isolation device is an optocoupler thyristor, and the control module is electrically connected to the MOSFET. When the control module controls the MOSFET to conduct, the light-emitting diode in the optocoupler thyristor will turn on, and the pin at the output terminal of the optocoupler thyristor will also conduct.

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