CN218481623U - Capacitor leakage detection circuit and leakage detection device - Google Patents
Capacitor leakage detection circuit and leakage detection device Download PDFInfo
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- CN218481623U CN218481623U CN202222329737.0U CN202222329737U CN218481623U CN 218481623 U CN218481623 U CN 218481623U CN 202222329737 U CN202222329737 U CN 202222329737U CN 218481623 U CN218481623 U CN 218481623U
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Abstract
The utility model relates to an electric capacity electric leakage detection circuit and electric leakage detection device, electric capacity electric leakage detection circuit include control module, charge and discharge control module, voltage acquisition conversion module and display module. The control module is connected with the charge-discharge control module to control the charge-discharge control module to charge the tested battery; the voltage acquisition and conversion module is connected with the charge and discharge control module to detect the tested battery to obtain voltage data, and is also connected with the control module to send the voltage data to the control module; the display module is connected with the control module to display the detection result of the detected battery according to the voltage data. The utility model discloses a control module control charge-discharge control module charges to receiving the measuring battery, still can show the testing result according to the voltage data who gathers on display module, can be used to simply, carry out leakage detection to electronic equipment high-efficiently, ensures the off-the-shelf quality when dispatching from the factory equipment, experiences for the user provides good use.
Description
Technical Field
The utility model relates to an electric leakage detection field especially relates to an electric capacity electric leakage detection circuit and electric leakage detection device.
Background
At present, electronic devices such as electronic cigarettes usually include a battery and a control board inside, the battery provides power for a circuit formed by electronic components on the control board, and the control board can be used for intelligently and automatically realizing the requirements of users. The control panel is generally provided with a capacitor component, the capacitor component has the functions of energy storage, filtering, decoupling and the like in a circuit, and an insulating medium is clamped between two polar plates.
However, if the surface of the capacitor component on the control board is dirty or cracks exist inside the capacitor component, the insulativity of the two internal polar plates is reduced, so that the capacitor component leaks electricity, the electric quantity of a battery in the electronic equipment is reduced due to the leakage of the capacitor, the service time of the electronic equipment is shortened, and the use experience of customers is reduced. Therefore, it is necessary to detect the capacitance leakage of the finished product of the electronic device at the time of factory assembly.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a capacitor leakage detecting circuit and a leakage detecting device for detecting capacitor leakage of an electronic device.
The utility model provides a capacitance leakage detection circuit, including control module, charge and discharge control module, voltage acquisition conversion module and display module. The control module is connected with the charge and discharge control module to control the charge and discharge control module to charge the battery to be tested; the voltage acquisition and conversion module is connected with the charge and discharge control module to detect the tested battery to obtain voltage data, and is also connected with the control module to send the voltage data to the control module; and the display module is connected with the control module to display the detection result of the tested battery according to the voltage data.
In an embodiment, the capacitance leakage detection circuit further includes a crystal oscillator module; the crystal oscillator module comprises a first capacitor, a second capacitor and a crystal oscillator; the first end of the first capacitor is connected with the first end of the crystal oscillator and the first clock pin of the control module, and the second end of the first capacitor is grounded; and the first end of the second capacitor is connected with the second end of the crystal oscillator and is connected with a second clock pin of the control module, and the second end of the second capacitor is grounded.
In one embodiment, the capacitive leakage detection circuit further comprises a reset module; the reset module comprises a first resistor, a third capacitor and a reset switch; the first end of the first resistor is connected with a reset pin of the control module, and the second end of the first resistor is grounded; the first end of the third capacitor is connected with the first end of the first resistor, and the second end of the third capacitor receives a power supply voltage; the first end of the reset switch is connected with the first end of the first resistor, and the second end of the reset switch receives power supply voltage.
In one embodiment, the charge and discharge control module includes a first switch element, a second switch element, and a third switch element; the control end of the first switch element is connected with a second control pin of the control module through a sixth resistor, and the second path end of the first switch element is grounded and connected with the negative electrode of the battery to be tested; a second control pin of the control module is also connected with a cathode of a second light-emitting diode, and an anode of the second light-emitting diode receives power supply voltage through an eighth resistor; the control end of the second switch element is connected with the first control pin of the control module through a fifth resistor, the first pass end of the second switch element receives the power supply voltage through a second resistor, and the second pass end of the second switch element is connected with the first pass end of the first switch element through a third resistor and is also connected with the anode of the battery to be tested; the first control pin of the control module is also connected with the cathode of the first light-emitting diode, and the anode of the first light-emitting diode receives power supply voltage through the seventh resistor; a control end of the third switching element is connected with a third control pin of the control module through a ninth resistor, a first path end of the third switching element is connected with a first path end of the second switching element through a fourth resistor, and a second path end of the third switching element is connected with a second path end of the second switching element; and a third control pin of the control module is also connected with a cathode of a third light-emitting diode, and an anode of the third light-emitting diode receives the power supply voltage through a tenth resistor.
In an embodiment, the capacitor leakage detection circuit further includes a power module, where the power module includes a transformer, a rectifier bridge, and a regulated output module; the input end of the transformer receives external first alternating voltage, and the output end of the transformer outputs second alternating voltage; the rectifier bridge is connected with the transformer and rectifies the second alternating voltage to obtain a first direct-current voltage; the input end of the voltage-stabilizing output module is connected with the rectifier bridge to receive the first direct-current voltage, and is also connected with the first end of a fourth capacitor and the first end of a fifth capacitor, the second end of the fourth capacitor and the second end of the fifth capacitor are grounded, the grounding end of the voltage-stabilizing output module is grounded, the output end of the voltage-stabilizing output module is connected with the first end of a sixth capacitor and the first end of a seventh capacitor, the second end of the sixth capacitor and the second end of the seventh capacitor are grounded, and the output end of the voltage-stabilizing output module outputs a stable second direct-current voltage to be provided to the control module, the charge and discharge control module, the voltage acquisition and conversion module and the display module as power supply voltage.
In an embodiment, the capacitor leakage detection circuit further includes a pull-up resistor module, a power supply end of the pull-up resistor module receives a power supply voltage, and a plurality of data bus pins of the pull-up resistor module are respectively connected to a plurality of data bus pins of the control module and also respectively connected to a plurality of data bus pins of the display module.
In an embodiment, a chip selection pin of the voltage acquisition and conversion module is connected with a chip selection pin of the control module, a clock pin of the voltage acquisition and conversion module is connected with a clock pin of the control module, and a data input pin and a data output pin of the voltage acquisition and conversion module are both connected with a data input and output pin of the control module.
In an embodiment, a first chip pin of the display module is connected to a first chip pin of the control module, a second chip pin of the display module is connected to a second chip pin of the control module, a ground pin of the voltage acquisition and conversion module is grounded, a power input pin of the voltage acquisition and conversion module receives a power supply voltage, a command data channel pin of the voltage acquisition and conversion module is connected to a command data channel pin of the control module, a read-write selection pin of the voltage acquisition and conversion module is connected to a read-write selection pin of the control module, an enable selection pin of the voltage acquisition and conversion module is connected to an enable selection pin channel pin of the control module, a reset pin of the voltage acquisition and conversion module receives the power supply voltage, and a display ground pin of the voltage acquisition and conversion module is grounded.
The utility model provides an electric leakage detection device, including foretell electric capacity electric leakage detection circuitry.
In an embodiment, the charging current detection circuit further comprises a charging circuit and an ammeter, wherein the charging circuit is used for charging the battery to be tested, and the ammeter is connected in series between the charging circuit and the battery to be tested, so as to determine whether capacitance leakage occurs according to the magnitude relation between the display value of the ammeter and a current threshold.
The utility model provides an electric capacity electric leakage detection circuit and electric leakage detection device, through control module like the singlechip, control charge and discharge control module charges to receiving the measuring battery, still can show the testing result according to the voltage data who gathers on display module, can be used to simply, carry out leakage detection to electronic equipment high-efficiently, ensures the off-the-shelf quality when dispatching from the factory the equipment, experiences for the user provides good use.
Drawings
Fig. 1 is a circuit connection block diagram of a capacitor leakage detection circuit according to a first embodiment of the present invention.
Fig. 2 is a circuit connection diagram of a capacitor leakage detection circuit according to a second embodiment of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description is given to the specific embodiments, structures, features and effects of the multilevel output gate transmission circuit and the display device according to the present invention with reference to the accompanying drawings and preferred embodiments.
The foregoing and other features, aspects and utilities of the present invention will be apparent from the following more particular description of the preferred embodiments, as illustrated in the accompanying drawings. While the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalents and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
First embodiment
Fig. 1 is a circuit connection block diagram of a capacitor leakage detection circuit according to a first embodiment of the present invention. Referring to fig. 1, the capacitor leakage detection circuit provided in the present embodiment includes a control module 100, a charge/discharge control module 200, a voltage acquisition and conversion module 300, and a display module 400. The control module 100 is connected to the charge and discharge control module 200 to control the charge and discharge control module 200 to charge the battery to be tested. The voltage acquisition and conversion module 300 is connected to the charge and discharge control module 200 to detect the battery under test and obtain voltage data, and the voltage acquisition and conversion module 300 is further connected to the control module 100 to transmit the voltage data to the control module 100. The display module 400 is connected to the control module 100 to display the test result of the battery under test according to the voltage data.
The utility model discloses an in the embodiment, electric capacity electric leakage detection circuitry still includes crystal oscillator module 500, and crystal oscillator module 500 links to each other with control module 100, and crystal oscillator module 500 produces stable, accurate single-frequency oscillation through the crystal oscillator, provides the frequency benchmark for control module 100.
The utility model discloses an in the embodiment, electric capacity electric leakage detection circuitry still includes power module 600, and power module 600 can receive alternating current input, generates stable DC voltage as mains voltage, and this mains voltage can send to control module 100, charge and discharge control module 200, voltage acquisition conversion module 300 and display module 400 etc. to be used for the normal work of each module.
Specifically, during the detection, the control module 100 sends a charging control signal to the charging and discharging control module 200, and controls the charging and discharging control module 200 to charge the battery to be detected. The voltage acquisition and conversion module 300 acquires voltage data of the battery under test during charging and sends the voltage data to the control module 100, and the control module 100 displays a detection result of the battery under test on the display module 400 according to the voltage data. If the capacitor leaks electricity, the electric quantity of the battery to be tested is reduced, and the battery voltage of the battery to be tested is reduced, for example, 4.1V when the battery is fully charged is reduced to 3.9V after the capacitor leaks electricity. The control module 100 can directly determine the voltage data to indicate the detection result displayed by the display module 400 as the battery voltage, and can obtain the detection voltage according to the voltage data, and perform a simple logic comparison of the magnitude relationship between the detection voltage and the threshold voltage, and then cause the display module 400 to display the corresponding detection result, such as "good product" or "bad product" according to the comparison result.
Therefore, the tester can determine whether the capacitor leaks electricity according to the detection result displayed by the display module 400, and can determine good products and defective products in the finished product, for example, the display module 400 displays "battery voltage: 3.9V ″, the tester compares the detection voltage 3.9V corresponding to the detection result with the voltage threshold 4.0V to determine that the capacitor has an electric leakage and the finished product is a defective product, or, for example, the display module 400 displays "good finished product", and the tester can directly determine that the finished product is a defective product.
The capacitor leakage detection circuit of the embodiment controls the charge and discharge control module 200 to charge a detected battery through the control module 100, can display a detection result on the display module 400 according to collected voltage data, can be used for simply and efficiently performing leakage detection on electronic equipment, ensures the quality of finished products in factory assembly, and provides good use experience for users.
Second embodiment
Fig. 2 is a circuit connection diagram of a capacitor leakage detection circuit according to a second embodiment of the present invention. Please refer to fig. 2.
In an embodiment of the present invention, the capacitor leakage detecting circuit further includes a crystal oscillator module 500. The crystal oscillator module 500 comprises a first capacitor C1, a second capacitor C2 and a crystal oscillator X1; a first end of the first capacitor C1 is connected to a first end of the crystal oscillator X1 and to a first clock pin of the control module 100, and a second end of the first capacitor C1 is grounded; a first end of the second capacitor C2 is connected to the second end of the crystal oscillator X1 and to the second clock pin of the control module 100, and a second end of the second capacitor C2 is grounded. The crystal oscillator module 500 is connected to the control module 100, and the crystal oscillator module 500 generates a stable and accurate single-frequency oscillation through the crystal oscillator X1, so as to provide a frequency reference for the control module 100.
In an embodiment of the present invention, the capacitor leakage detection circuit further includes a reset module 700. The reset module 700 includes a first resistor R1, a third capacitor C3, and a reset switch; a first end of the first resistor R1 is connected to a reset pin of the control module 100, and a second end of the first resistor R1 is grounded; a first end of a third capacitor C3 is connected with a first end of the first resistor R1, and a second end of the third capacitor C3 receives a power supply voltage; the first end of the reset switch is connected with the first end of the first resistor R1, and the second end of the reset switch receives the power supply voltage. The reset switch of the reset circuit is set to be in an off state by default, the reset pin of the control module 100 can be grounded to be in a low level state through the first resistor R1, and the control module 100 is in a normal working state. When the reset switch of the reset circuit is pressed, the reset pin of the control module 100 receives the power voltage through the reset switch, so that the control module 100 enters a reset state. The initialization of the control module 100 may be completed by a reset operation, and the program of the control module 100 in the dead halt state may be restarted.
In an embodiment of the present invention, the charge and discharge control module 200 includes a first switch element, a second switch element, and a third switch element. The control end of the first switching element is connected with the second control pin of the control module 100 through a sixth resistor R6, and the second path end of the first switching element is grounded and connected with the negative electrode of the battery to be tested; the second control pin of the control module 100 is further connected to a cathode of the second light emitting diode D2, and an anode of the second light emitting diode D2 receives the power supply voltage through the eighth resistor R8. A control end of the second switching element is connected with a first control pin of the control module 100 through a fifth resistor R5, a first path end of the second switching element receives a power supply voltage through a second resistor R2, and a second path end of the second switching element is connected with a first path end of the first switching element through a third resistor R3 and is also connected with the anode of the battery to be tested; the first control pin of the control module 100 is further connected to a cathode of the first light emitting diode D1, and an anode of the first light emitting diode D1 receives a power supply voltage through the seventh resistor R7. A control end of the third switching element is connected to a third control pin of the control module 100 through a ninth resistor R9, a first path end of the third switching element is connected to a first path end of the second switching element through a fourth resistor R4, and a second path end of the third switching element is connected to a second path end of the second switching element; the third control pin of the control module 100 is further connected to a cathode of the third light emitting diode D3, and an anode of the third light emitting diode D3 receives the power voltage through the tenth resistor R10.
Specifically, when performing the capacitor leakage detection, the control module 100 may control the first control pin to be in a low level state, and the control end of the second switch element may receive the low level through the fifth resistor R5, and the second switch element is in a conducting state, so that the battery to be detected may receive the power voltage through the conducting second switch element and the second resistor R2 to perform charging. At this time, the anode of the first light emitting diode D1 receives the power voltage through the seventh resistor R7, the cathode thereof receives the low level of the first control pin, the conduction voltage is formed at both ends, and the first light emitting diode D1 emits light and can be used for a fast charging indication. In other embodiments, the control module 100 may control the second control pin to be in a low level state, the control terminal of the first switch element may receive a low level through the sixth resistor R6, and the first switch element is in a conducting state, so that the battery under test may be discharged by grounding the conducting first switch element and the third resistor R3. At this time, the anode of the second light emitting diode D2 receives the power voltage through the eighth resistor R8, the cathode thereof receives the low level of the second control pin, the conduction voltage is formed at both ends, and the second light emitting diode D2 emits light and can be used for discharge indication. In other embodiments, the control module 100 may control the third control pin to be in a low state, the control terminal of the third switching element may receive a low level through the ninth resistor R9, and the third switching element is in a conducting state, so that the battery under test may receive the power voltage through the conducting third switching element, the conducting fourth resistor R4, and the conducting second resistor R2 to perform the trickle charging. At this time, the anode of the third light emitting diode D3 receives the power voltage through the tenth resistor R10, the cathode thereof receives the low level of the third control pin, a conduction voltage is formed at both ends, and the third light emitting diode D3 emits light and can be used for trickle charge indication.
In an embodiment of the present invention, the capacitor leakage detecting circuit further includes a power module 600, and the power module 600 includes a transformer 610, a rectifier bridge 620, and a voltage stabilizing output module 630. The input terminal of the transformer 610 receives an external first ac voltage, for example, 220V, and the output terminal of the transformer 610 outputs a second ac voltage, for example, 52.7V. The rectifier bridge 620 is connected to the transformer 610, and rectifies the second ac voltage to obtain a first dc voltage. The input end of the regulated output module 630 is connected to the rectifier bridge 620 to receive the first dc voltage, and is further connected to the first end of the fourth capacitor C4 and the first end of the fifth capacitor C5, the second end of the fourth capacitor C4 and the second end of the fifth capacitor C5 are grounded, the ground end of the regulated output module 630 is grounded, the output end of the regulated output module 630 is connected to the first end of the sixth capacitor C6 and the first end of the seventh capacitor C7, the second end of the sixth capacitor C6 and the second end of the seventh capacitor C7 are grounded, and the output end of the regulated output module 630 outputs a stable second dc voltage, for example, 5V, for being provided to the control module 100, the charge and discharge control module 200, the voltage acquisition and conversion module 300, and the display module 400 as a power supply voltage. The sizes of the fourth capacitor C4 and the fifth capacitor C5 connected in parallel may be different, for example, 1000uF and 0.1uF, respectively, which may widen the filtering frequency range of the regulated output module 630 at the input end; the sizes of the sixth capacitor C6 and the seventh capacitor C7 connected in parallel may be different, for example, 470uF and 0.1uF, respectively, which may widen the filtering frequency range of the regulated output module 630 at the output end.
In an embodiment of the present invention, the type of the transformer 610 may be TRAN-2P2S.
In an embodiment of the present invention, the model of the voltage-stabilizing output module 630 may be 7805.
The utility model discloses an in the embodiment, electric capacity leakage detection circuit still includes pull-up resistance module 800, and mains voltage is received to pull-up resistance module 800's power end, and a plurality of data bus pins of pull-up resistance module 800 link to each other with a plurality of data bus pins of control module 100 respectively, still link to each other with a plurality of data bus pins of display module 400 respectively. The pull-up resistor module 800 is used to ensure that the corresponding pins of the control module 100 and the display module 400 are in a high level state, so as to avoid the risk of voltage floating of the pins. Meanwhile, data communication can be performed between the control module 100 and the display module 400 through the pins, and the control module 100 can correspondingly control the display module 400 to perform corresponding display.
The utility model discloses an embodiment, the chip selection pin of voltage acquisition conversion module 300 links to each other with control module 100's chip selection pin, and the clock pin of voltage acquisition conversion module 300 links to each other with control module 100's clock pin, and the data input pin and the data output pin of voltage acquisition conversion module 300 all link to each other with control module 100's data input output pin, and voltage acquisition conversion module 300 can be corresponding sends voltage data to control module 100.
In an embodiment of the present invention, the model number of the voltage collecting and converting module 300 is ADC0832.
The utility model discloses an embodiment, the first piece of display module 400 selects the pin to link to each other with control module 100's first piece selection pin, the second piece of display module 400 selects the pin to link to each other with control module 100's second piece selection pin, voltage acquisition conversion module 300's ground connection pin, voltage acquisition conversion module 300's power input pin receives mains voltage, voltage acquisition conversion module 300's instruction data channel pin links to each other with control module 100's instruction data channel pin, voltage acquisition conversion module 300's reading and writing selection pin links to each other with control module 100's reading and writing selection pin, voltage acquisition conversion module 300's messenger selection pin links to each other with control module 100's messenger selection pin channel pin, voltage acquisition conversion module 300's reset pin receives mains voltage, voltage acquisition conversion module 300's demonstration ground connection pin ground connection.
In an embodiment of the present invention, the model number of the display module 400 may be AMPIRE128x64.
In an embodiment of the present invention, the control module 100 may be a single chip microcomputer AT89C51.
Based on same utility model the design, the embodiment of the utility model provides a still provides an electric leakage detection device, include the embodiment of the above-mentioned electric capacity electric leakage detection circuit that provides, this electric leakage detection device's implementation can be seen in the embodiment of above-mentioned electric capacity electric leakage detection circuit, and repeated part is no longer repeated.
The utility model discloses an in the embodiment, electric leakage detection device still includes charging current detection circuitry, and charging current detection circuitry includes charging circuit and ampere meter, and charging circuit is used for charging to the quilt battery, and the ampere meter is established ties at charging circuit and quilt between the battery to according to the big or small relation of the display value of ampere meter and current threshold value, confirm whether take place the electric capacity electric leakage. Specifically, during detection, the charging circuit charges the battery to be detected, and the ammeter detects the charging current. If the capacitor is leaked, the electric quantity of the tested battery is reduced, and the charging current of the tested battery is relatively large when the tested battery is charged. Therefore, the tester can determine whether the capacitor leaks electricity according to the display value of the ammeter, and can determine good products and defective products in the finished products, for example, the display value of the ammeter is 0.5A, and the tester compares the detection current display value 0.5A with the current threshold value 0.2A to determine that the capacitor leaks electricity, and the finished products are defective products.
The capacitor leakage detection circuit and the leakage detection device of the embodiment control the charge and discharge control module 200 to charge the detected battery through the control module 100, can display a detection result on the display module 400 according to the acquired voltage data, can be used for simply and efficiently detecting the leakage of the electronic equipment, ensures the quality of finished products when the electronic equipment leaves a factory and provides good use experience for users.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The capacitor leakage detection circuit is characterized by comprising a control module (100), a charge-discharge control module (200), a voltage acquisition and conversion module (300) and a display module (400);
the control module (100) is connected with the charge-discharge control module (200) to control the charge-discharge control module (200) to charge the tested battery;
the voltage acquisition and conversion module (300) is connected with the charge and discharge control module (200) to detect the tested battery to obtain voltage data, and the voltage acquisition and conversion module (300) is also connected with the control module (100) to send the voltage data to the control module (100);
and the display module (400) is connected with the control module (100) to display the detection result of the tested battery according to the voltage data.
2. The capacitive leakage detection circuit of claim 1, further comprising a crystal module (500);
the crystal oscillator module (500) comprises a first capacitor (C1), a second capacitor (C2) and a crystal oscillator; the first end of the first capacitor (C1) is connected with the first end of the crystal oscillator and is connected with a first clock pin of the control module (100), and the second end of the first capacitor (C1) is grounded; and the first end of the second capacitor (C2) is connected with the second end of the crystal oscillator and is connected with the second clock pin of the control module (100), and the second end of the second capacitor (C2) is grounded.
3. The capacitive leakage detection circuit of claim 1, further comprising a reset module (700);
the reset module (700) comprises a first resistor (R1), a third capacitor (C3) and a reset switch; a first end of the first resistor (R1) is connected with a reset pin of the control module (100), and a second end of the first resistor (R1) is grounded; a first end of the third capacitor (C3) is connected with a first end of the first resistor (R1), and a second end of the third capacitor (C3) receives a power supply voltage; the first end of the reset switch is connected with the first end of the first resistor (R1), and the second end of the reset switch receives power supply voltage.
4. The capacitive leakage detection circuit according to claim 1, wherein the charge and discharge control module (200) comprises a first switching element, a second switching element, a third switching element;
the control end of the first switching element is connected with a second control pin of the control module (100) through a sixth resistor (R6), and the second path end of the first switching element is grounded and connected with the negative electrode of the battery to be tested; a second control pin of the control module (100) is further connected with a cathode of a second light-emitting diode (D2), and an anode of the second light-emitting diode (D2) receives power supply voltage through an eighth resistor (R8);
the control end of the second switch element is connected with a first control pin of the control module (100) through a fifth resistor (R5), the first pass end of the second switch element receives the power supply voltage through a second resistor (R2), and the second pass end of the second switch element is connected with the first pass end of the first switch element through a third resistor (R3) and is also connected with the anode of the tested battery; a first control pin of the control module (100) is also connected with a cathode of a first light-emitting diode (D1), and an anode of the first light-emitting diode (D1) receives power supply voltage through a seventh resistor (R7);
the control end of the third switching element is connected with a third control pin of the control module (100) through a ninth resistor (R9), the first path end of the third switching element is connected with the first path end of the second switching element through a fourth resistor (R4), and the second path end of the third switching element is connected with the second path end of the second switching element; and a third control pin of the control module (100) is also connected with a cathode of a third light-emitting diode (D3), and an anode of the third light-emitting diode (D3) receives the power supply voltage through a tenth resistor (R10).
5. The capacitive leakage detection circuit of claim 1, further comprising a power module (600), the power module (600) comprising a transformer (610), a rectifier bridge (620), and a regulated output module (630);
the input end of the transformer (610) receives a first external alternating voltage, and the output end of the transformer (610) outputs a second alternating voltage;
the rectifier bridge (620) is connected with the transformer (610) and rectifies the second alternating-current voltage to obtain a first direct-current voltage;
the input end of the regulated output module (630) is connected to the rectifier bridge (620) to receive the first dc voltage, and is further connected to the first end of a fourth capacitor (C4) and the first end of a fifth capacitor (C5), the second end of the fourth capacitor (C4) and the second end of the fifth capacitor (C5) are grounded, the ground end of the regulated output module (630) is grounded, the output end of the regulated output module (630) is connected to the first end of a sixth capacitor (C6) and the first end of a seventh capacitor (C7), the second end of the sixth capacitor (C6) and the second end of the seventh capacitor (C7) are grounded, and the output end of the regulated output module (630) outputs a second stable dc voltage to be provided to the control module (100), the charge and discharge control module (200), the voltage acquisition and conversion module (300) and the display module (400) as a power supply voltage.
6. The capacitive leakage detection circuit of claim 1, further comprising a pull-up resistor module (800), a power supply terminal of the pull-up resistor module (800) receiving a supply voltage, a plurality of data bus pins of the pull-up resistor module (800) being respectively connected to a plurality of data bus pins of the control module (100) and to a plurality of data bus pins of the display module (400).
7. The capacitive leakage detection circuit according to claim 1, wherein a chip select pin of the voltage acquisition and conversion module (300) is connected to a chip select pin of the control module (100), a clock pin of the voltage acquisition and conversion module (300) is connected to a clock pin of the control module (100), and a data input pin and a data output pin of the voltage acquisition and conversion module (300) are both connected to a data input and output pin of the control module (100).
8. The capacitive leakage detection circuit according to claim 1, wherein a first chip select pin of the display module (400) is connected to a first chip select pin of the control module (100), a second chip select pin of the display module (400) is connected to a second chip select pin of the control module (100), a ground pin of the voltage acquisition and conversion module (300) is grounded, a power input pin of the voltage acquisition and conversion module (300) receives a power voltage, a command data channel pin of the voltage acquisition and conversion module (300) is connected to a command data channel pin of the control module (100), a read/write select pin of the voltage acquisition and conversion module (300) is connected to a read/write select pin of the control module (100), an enable select pin of the voltage acquisition and conversion module (300) is connected to an enable select pin of the control module (100), a reset pin of the voltage acquisition and conversion module (300) receives a power voltage, and a display ground pin of the voltage acquisition and conversion module (300) is grounded.
9. An electrical leakage detection device comprising a capacitive leakage detection circuit according to any one of claims 1 to 8.
10. The electrical leakage detection device of claim 9, further comprising a charging current detection circuit, wherein the charging current detection circuit comprises a charging circuit and a current meter, wherein the charging circuit is used for charging the battery under test, and the current meter is connected in series between the charging circuit and the battery under test, so as to determine whether capacitance electrical leakage occurs according to the magnitude relation between the display value of the current meter and a current threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222329737.0U CN218481623U (en) | 2022-08-31 | 2022-08-31 | Capacitor leakage detection circuit and leakage detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202222329737.0U CN218481623U (en) | 2022-08-31 | 2022-08-31 | Capacitor leakage detection circuit and leakage detection device |
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