Voltage measurement and rapid discharge device for high-voltage equipment

Abstract

The utility model discloses a voltage measurement and rapid discharge device for high-voltage equipment, and relates to a direct-current voltage measurement and rapid discharge device applied to the high-voltage equipment. The right side of the upper end face of the cuboid shell is provided with a sensor interface and an adaptive connecting port, and a pluggable measuring pen is inserted into the connecting port; the center of the upper end face is provided with a DC digital display intelligent meter for displaying the residual voltage value in the high-voltage equipment in real time; a power switch button and a quick discharge button are arranged below the upper end surface; an indicator light I and an indicator light II are arranged on one side of the quick discharge button; wherein the first indicating lamp is a normal working state indicating lamp, and the second indicating lamp is an alarm / discharge state indicating lamp. A battery compartment is arranged at the bottom of the discharge monitoring device body, and a power supply is arranged in the battery compartment and supplies power to the measurement input circuit, the direct-current digital display intelligent meter and the alarm circuit. The power supply is a lithium battery or a nickel-metal hydride battery. The model number of the direct current digital display intelligent meter is YB5140B.

Description

TECHNICAL FIELD

[0001] The utility model relates to a high -voltage equipment voltage measurement and quick discharge device relates to the direct current voltage measurement and quick discharge device for high -voltage equipment. BACKGROUND

[0002] In the new energy automobile drive motor maintenance process, the high voltage capacitor such as energy storage element exists in the motor controller, these energy storage elements still remain higher voltage after power off, if not effectively measure and release residual voltage before maintenance, there is the risk of electric shock when maintenance personnel contact, but the current market lacks the integrated detection device specially for new energy automobile drive motor controller, the function of traditional voltage measurement and discharge equipment is separated, and the operation is complicated, cannot satisfy the efficient, safe demand under the new energy automobile maintenance scene, therefore, the special device that adapts new energy automobile drive motor controller maintenance scene, direct current voltage measurement, quick discharge is urgently needed in one. INVENTION CONTENTS

[0003] The utility model discloses a high -voltage equipment voltage measurement and quick discharge device can realize residual voltage's second level release and maintenance state visual monitoring through the integration high -precision voltage detection, initiative trigger type discharge and audible -visual alarm function, ensure the safety of operating personnel, improve the maintenance efficiency.

[0004] The utility model discloses a high -voltage equipment voltage measurement and quick discharge device has discharge monitoring device main part, and discharge monitoring device main part has the cuboid shell, and its upper end face right side is equipped with sensor interface, and the adaptive connecting mouth is connected, and the connecting mouth is inserted with the pluggable measuring pen, and the upper end face central part is equipped with direct current digital display intelligent table, and is used for real -time display high -voltage equipment inside residual voltage value, and the upper end face below is equipped with power switch button and quick discharge button, and one side of quick discharge button is equipped with pilot lamp one (normal working pilot lamp) and pilot lamp two (alarm / discharge state pilot lamp), wherein pilot lamp one is normal working state pilot lamp, and pilot lamp two is alarm / discharge state pilot lamp.

[0005] The bottom of discharge monitoring device main part is equipped with battery compartment, and built -in power supply supplies power for measurement input circuit, direct current digital display intelligent table and alarm circuit.

[0006] The power supply is rechargeable battery, specifically lithium battery or nickel -hydrogen battery.

[0007] The direct current digital display intelligent table is the product on sale, and the model is YB5140B.

[0008] Specifically, the direct current digital display intelligent meter is provided with a power supply port on one side, the power supply port is connected to a power supply circuit, the power supply circuit is provided with a power supply and a normally open general on-off switch, and the general on-off switch is a power switch button.

[0009] Further, the power supply circuit is provided with an indicator lamp two and an indicator lamp three in parallel with the direct current digital display intelligent meter, the indicator lamp two is an alarm / discharge state indicator lamp, and the indicator lamp three is a normal working state indicator lamp, a single-pole double-throw switch is arranged at the tail end of the indicator lamp two and the indicator lamp three, the direct current digital display intelligent meter is provided with control interfaces A1 and A2, the control interfaces A1 and A2 are signal connected to a relay, and the relay controls the state of the single-pole double-throw switch by receiving signals of the control interfaces A1 and A2 during working; when the voltage is high, the tail end circuit of the indicator lamp two is connected, and the indicator lamp two is lighted; when the voltage is low, the tail end circuit of the indicator lamp three is connected, and the indicator lamp three is lighted.

[0010] Further, the direct current digital display intelligent meter is further electrically connected with a buzzer for alarming, and the buzzer works simultaneously when the voltage is high and the indicator lamp two is lighted, thereby playing an alarming role.

[0011] Specifically, the direct current digital display intelligent meter is further provided with two measurement input interfaces, and the two measurement input interfaces are provided with a normally open discharge switch and a power resistor.

[0012] The two measurement input interfaces can be inserted with a measurement pen in parallel with the power resistor.

[0013] The utility model discloses a direct current digital display intelligent meter for new energy automobile drive motor, which can respectively carry out voltage measurement, rapid discharge, abnormal alarm, power-on detection and active discharge.

[0014] Voltage measurement:

[0015] Disconnect the power supply of the new energy automobile drive motor, and connect the measurement pen detection end to the motor controller high voltage interface. The direct current digital display intelligent meter obtains the voltage signal through the measurement input circuit and displays the residual voltage value. The maintenance personnel can switch to the "automobile special measurement mode" through the MODE button and set the range suitable for the motor controller voltage range through the SET button to ensure the measurement accuracy.

[0016] Rapid discharge:

[0017] After confirming the measured voltage value, press the quick discharge button, and the power resistor inside the device is connected to the motor controller circuit to quickly discharge the high-voltage capacitor and other energy storage elements. During the discharging process, indicator light two flashes to show the discharging state, and the buzzer continuously alarms. When the discharge reaches the set value, indicator light two is turned off and the buzzer stops, and indicator light one is normally lit, prompting the maintenance personnel to safely perform subsequent maintenance operations.

[0018] Abnormal alarm:

[0019] If the measured voltage exceeds the safety threshold or an abnormality occurs during discharging, the relay module triggers the alarm circuit through the external control interface (A1, A2), the buzzer continuously alarms, and alarm indicator light two is always on, reminding the maintenance personnel to stop operation and troubleshoot the risk.

[0020] Connection device:

[0021] Connect the red probe of the measuring pen to the positive terminal of the MCU DC bus, and the black probe to the negative terminal. Connect the vehicle chassis with the alligator clip.

[0022] Power-on detection:

[0023] Press the power switch, and the DC digital display intelligent meter displays the current voltage (for example, 520V), indicator light one flashes at high frequency, and the buzzer continuously alarms.

[0024] Active discharge:

[0025] Press and hold the quick discharge button, and the power resistor is connected to the bus loop. The digital display meter value quickly decreases within 2 seconds, the buzzer stops, and indicator light one is always on.

[0026] Compared with the existing equipment, the utility model has the following beneficial effects:

[0027] The high-voltage equipment DC voltage measurement and quick discharge device provided by the utility model has the following advantages. First, it integrates DC voltage measurement, quick discharge, intelligent display, and alarm functions, effectively solves the problem of scattered functions of traditional equipment, and greatly improves the work efficiency of high-voltage equipment detection and maintenance.

[0028] Secondly, the detachable measuring pen design increases the flexibility of the device in use, making it convenient to operate in different scenarios. The DC digital display intelligent meter can directly display the voltage value, so that the operator can quickly obtain the key information. The quick discharge button cooperates with the power resistor to ensure the quick and safe release of the residual voltage of the high-voltage equipment, reducing the risk of electric shock for the maintenance personnel. The alarm module can monitor the running state of the equipment in real time, and once an abnormality occurs, it will promptly issue an alarm, ensuring the safety of the operation.

[0029] In addition, the charging function and emergency power supply function of the battery carried by the device further improve the practicability and applicability of the device. In a special working scenario, the device can provide necessary power support for other equipment, avoiding the influence of work progress due to insufficient equipment power. BRIEF DESCRIPTION OF DRAWINGS

[0030] Fig. 1 is a schematic diagram of the appearance structure of the high-voltage equipment voltage measurement and rapid discharge device.

[0031] Fig. 2 is a schematic diagram of the internal connection circuit structure of the high-voltage equipment voltage measurement and rapid discharge device. DETAILED DESCRIPTION

[0032] In order to further illustrate the utility model in detail, refer to the attached Fig. 1-2 The structure of the utility model is as follows:

[0033] The high-voltage equipment voltage measurement and rapid discharge device has a discharge monitoring device main body (1), which has a cuboid shell, a sensor interface (2) is arranged on the right side of the upper end face, an adaptive connection port is arranged, and a pluggable measurement pen (3) is inserted into the connection port; a DC digital display intelligent meter (4) is arranged at the center of the upper end face, which is used for real-time display of the residual voltage value in the high-voltage equipment; a power switch button (9) and a rapid discharge button (10) are arranged below the upper end face, an indicator light one (5) (normal working indicator light) and an indicator light two (6) (alarm / discharge state indicator light) are arranged on one side of the rapid discharge button (10); wherein the indicator light one (5) is a normal working state indicator light, and the indicator light two (6) is an alarm / discharge state indicator light.

[0034] A battery compartment (8) is arranged at the bottom of the discharge monitoring device main body (1), and a built-in power supply is arranged for power supply of the measurement input circuit, the DC digital display intelligent meter (4) and the alarm circuit.

[0035] The power supply is a rechargeable battery, specifically a lithium battery or a nickel-hydrogen battery.

[0036] The DC digital display intelligent meter (4) is a commercially available product, the model number is YB5140B, the power supply is DC 5~24V, the working temperature is-10~50 degrees, and the working current is <200 milliamperes.

[0037] Specifically, one side of the DC digital display intelligent meter (4) is provided with a power supply port, the power supply port is connected to a power supply circuit, a power supply and a normally open main switch are arranged on the power supply circuit, and the main switch is a power switch button (9). An indicator light one (5) is also arranged on the power supply circuit in parallel with the DC digital display intelligent meter (4), and when the power switch button (9) is closed, the DC digital display intelligent meter (4) and the indicator light one (5) are turned on at the same time.

[0038] Further, on the power supply circuit, the indicator lamp two (6) and the indicator lamp three (8) are arranged in parallel with the indicator lamp one (5) respectively, the indicator lamp two (6) is used for indicating the alarm / discharge state, and the indicator lamp three (8) is used for indicating the normal working state, a single-pole double-throw switch (11) is arranged at the tail end of the indicator lamp two (6) and the indicator lamp three (8); the control interfaces A1 and A2 are arranged on the DC digital intelligent meter (4) respectively, the control interfaces A1 and A2 are signal connected with the relay, and the relay controls the state of the single-pole double-throw switch (11) by receiving the signals of the control interfaces A1 and A2 in working; when the voltage is higher, the tail end circuit of the indicator lamp two (6) is connected, and the indicator lamp two (6) is lighted; when the voltage is lower, the tail end circuit of the indicator lamp three (8) is connected, and the indicator lamp three (8) is lighted.

[0039] Further, the DC digital intelligent meter (4) is further electrically connected with a buzzer used for alarming, and the buzzer works simultaneously when the voltage is higher and the indicator lamp two (6) is lighted, so that the alarming function is realized.

[0040] The buzzer is a piezoelectric buzzer, and the model is Kc1206.

[0041] The relay is JQC-T78-DC12V-C 5V, the maximum switching voltage is 250VAC / 16VDC, the maximum switching current is 25A, and the maximum swing force is 840VA / 280W.

[0042] Specifically, the DC digital intelligent meter (4) is further provided with two measurement input interfaces, and the discharge switch and the power resistor are arranged between the two measurement input interfaces and are normally open.

[0043] The measurement pen (3) can be inserted into the measurement input interface in parallel with the power resistor.

[0044] The power resistor is an aluminum shell resistor RX24-50W, the power is 50W, the resistance value is 1K, the temperature range is -22-275 DEG C, the insulation resistance value is greater than or equal to 10000 M ohm, and the short-term overload voltage is 1500V.

[0045] The utility model can respectively carry out voltage measurement, rapid discharge, abnormal alarm, power-on detection and active discharge, and the specific operation method is as follows:

[0046] Voltage measurement:

[0047] Disconnect the new energy vehicle drive motor power supply, use the measuring pen (3) to detect the connection motor controller high voltage interface.

[0048] Fast discharge:

[0049] After confirming the measured voltage value, press the fast discharge button, and the internal power resistor of the device is connected to the motor controller circuit to quickly discharge the energy storage elements such as high-voltage capacitors.

[0050] Abnormal alarm:

[0051] If the measured voltage exceeds the safety threshold or an abnormality occurs during discharging, the relay module triggers the alarm circuit through the external control interface (A1, A2), and the buzzer continuously alarms.

[0052] Connection equipment:

[0053] Connect the red probe of the measuring pen (3) to the positive terminal of the MCU DC bus, and the black probe to the negative terminal.

[0054] Power-on detection:

[0055] Press the power switch, and the DC digital display intelligent meter (4) displays the current voltage (for example, 520V), the indicator light one (5) flashes at high frequency, and the buzzer continuously alarms.

[0056] Active discharge:

[0057] Press and hold the fast discharge button, the power resistor is connected to the bus loop, the digital display meter value decreases rapidly, reaches within 2 seconds, the buzzer stops, and the indicator light one (5) is always on.

[0058] The high-voltage equipment voltage measurement and fast discharge device can perform intelligent monitoring and display:

[0059] The DC digital intelligent meter (4) covers a range of 0-1000V with an accuracy of ±0.5%, and is provided with a built-in voltage threshold comparator for setting a safe voltage threshold (e.g. 12V) and triggering an alarm when the threshold is exceeded.

[0060] The high-voltage equipment voltage measurement and rapid discharge device can perform rapid discharge.

[0061] One-key discharge control, the rapid discharge button is designed with double-contact anti-misoperation, and the discharge is activated by long pressing for 2 seconds to avoid accidental triggering; a power resistor is integrated inside the discharge monitoring device main body (1), one end of the power resistor is connected to the measurement input circuit, and the other end is used for connecting the high-voltage equipment; when the maintenance personnel press the rapid discharge button, the power resistor is connected to the circuit of the high-voltage equipment, and the residual charge in the high-voltage equipment is rapidly released to realize the function of rapid discharge.

[0062] The high-voltage equipment voltage measurement and rapid discharge device can perform alarm.

[0063] The utility model discloses an integrated alarm circuit inside, and the circuit includes a buzzer and an alarm indicator lamp. Meanwhile, the device is also provided with a relay module, and the relay module is provided with an external control interface (A1, A2) for receiving external control signals. When the device detects that the voltage of the high-voltage equipment is abnormal (e.g. exceeds the safety threshold) or an abnormal situation occurs during discharge, the relay module will trigger the alarm circuit, and the buzzer will emit an alarm sound and the alarm indicator lamp will light up, thereby timely reminding the operator to take corresponding measures.

[0064] The high-voltage equipment voltage measurement and rapid discharge device can perform battery charging and discharging.

[0065] The discharge monitoring device main body (1) is provided with a charging interface for connecting an external power supply to charge the power supply battery in the battery compartment. In addition, a discharge interface is also provided, and when other equipment is low in power, the power supply battery can be connected to the discharge interface to realize the function of emergency power supply for other equipment.

Claims

1. A voltage measurement and rapid discharge device for high-voltage equipment, characterized in that: The device comprises a main body for a discharge monitoring device, which has a rectangular shell. A sensor interface and adapter connector are located on the right side of the upper end face, through which a pluggable measuring probe is inserted. A DC digital display smart meter is located in the center of the upper end face for real-time display of the residual voltage value inside the high-voltage equipment. A power switch button and a fast discharge button are located at the bottom of the upper end face. To one side of the fast discharge button are indicator lights one and two; indicator light one indicates normal operating status, and indicator light two indicates alarm / discharge status. The bottom of the main body of the discharge monitoring device is equipped with a battery compartment, which houses the power supply to power the measurement input circuit, the DC digital display smart meter, and the alarm circuit.

2. The high-voltage equipment voltage measurement and rapid discharge device according to claim 1, characterized in that: The power supply is a lithium battery or a nickel-metal hydride battery.

3. The voltage measurement and rapid discharge device for high-voltage equipment according to claim 1, characterized in that: The aforementioned DC digital display smart meter is model YB5140B.

4. The voltage measurement and rapid discharge device for high-voltage equipment according to claim 1, characterized in that: The DC digital display smart meter has a power supply port on one side, which is connected to the power supply circuit. The power supply circuit is equipped with a power supply and a normally open main switch, which is a power switch button. An indicator light is also installed on the power supply circuit in parallel with the DC digital display smart meter. When the power switch button is closed, the DC digital display smart meter and indicator light are turned on simultaneously.

5. The voltage measurement and rapid discharge device for high-voltage equipment according to claim 1, characterized in that: In the power supply circuit, an alarm / discharge status indicator (Indicator 2) and a normal operation status indicator (Indicator 3) are connected in parallel with Indicator 1. A single-pole double-throw switch is installed at the tail end of Indicator 2 and Indicator 3. Control interfaces A1 and A2 are respectively installed on the DC digital display smart meter. Control interfaces A1 and A2 are respectively connected to relays. During operation, the relays control the state of the single-pole double-throw switch by receiving signals from control interfaces A1 and A2. When the voltage is high, Indicator 2 is connected to the tail end circuit of Indicator 2, and Indicator 2 lights up; when the voltage is low, Indicator 3 is connected to the tail end circuit of Indicator 3, and Indicator 3 lights up.

6. The voltage measurement and rapid discharge device for high-voltage equipment according to claim 5, characterized in that: The DC digital display smart meter is also electrically connected to a buzzer that serves as an alarm. When the voltage is high and the two indicator lights are on, the buzzer will also work to provide an alarm.

7. The voltage measurement and rapid discharge device for high-voltage equipment according to claim 5, characterized in that: The DC digital display smart meter is also equipped with two measurement input interfaces, and a normally open discharge switch and a power resistor are respectively set between the two measurement input interfaces; A measuring probe connected in parallel with the power resistor can be inserted into both measurement input interfaces.

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