Tool for detecting insulating property of direct current output loop

Abstract

The invention relates to the technical field of charging pile detection tools, and discloses a tool for detecting the insulation performance of a direct current output loop, the tool comprises a circuit and a panel, and the circuit comprises a central processing module, a driving module, a power supply, a boosting transformer, a low-voltage sampling module, a load switching circuit, a current limiting circuit, an equivalent circuit, a V / A conversion circuit and a measurement sampling circuit. According to the tool for detecting the insulation performance of the direct-current output loop, through the arrangement of the insulation detection tool, whether an important line is normal or not can be detected, meanwhile, whether the insulation resistance of equipment meets the standard requirement or not can be detected, the wire diameter of an inlet wire cable is increased on a charging pile with large power, and consequently the equipment is difficult to disassemble, and the cost is reduced. When the tool is used for testing, a high-power inlet wire cable does not need to be connected, and only an auxiliary low-voltage direct-current power supply needs to be supplied, so that the tool is convenient to disassemble, assemble and maintain, and the production efficiency of products can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of charging pile detection tooling, and in particular to a tooling for detecting insulation performance of a DC output circuit. Background Art

[0002] Insulation testing is an important means to evaluate the insulation performance of charging piles. Through it, insulation performance problems can be discovered and solved in a timely manner, and leakage, breakdown and other faults can be prevented, thereby ensuring the safety of users.

[0003] The main core components of the charging pile are the charging module and the DC output module, so the safety of these two parts is particularly important. Generally, the inspection of these two modules is to power on and debug the entire machine after installation, and use the system software to judge the insulation and pressure resistance between the module circuit and the casing (PE).

[0004] For the direct power-on detection of these two modules, the DC output gun line needs to be connected to the analog charging device, and the insulation of the line needs to be tested at the same time. If the equipment is wired incorrectly, it will cause damage to the protection components and even key objects. Although some charging piles have software early warning judgments, there are still risks. There are many uncertain factors. For example, software false alarms will cause the query direction to be wrong and affect the debugging progress of the equipment. If there is a real line fault, the main loop circuit needs to be disassembled, increasing the repeated workload. In case of multiple fault points, it will greatly increase the maintenance time and difficulty. Summary of the invention

[0005] The purpose of the present invention is to provide a tool for detecting the insulation performance of a DC output circuit, so as to solve the problem that if the two modules are powered on and the equipment is wired incorrectly, the protection components will be damaged, and if there is a line fault, the main circuit needs to be disassembled, which increases the maintenance time and difficulty.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a tool for detecting the insulation performance of a DC output circuit, comprising a circuit and a panel, wherein the circuit comprises a central processing module, a drive module, a power supply, a step-up transformer, a low-voltage sampling module, a load switching circuit, a current limiting circuit, an equivalent circuit, a V / A conversion circuit, and a measurement sampling circuit; The load switching circuit is electrically connected to the low voltage sampling module and the central processing module measurement sampling circuit; The low-voltage sampling module is electrically connected to the central processing module, the central processing module is electrically connected to the current limiting circuit, the central processing module is electrically connected to the driving module, and the central processing module is electrically connected to the power supply; The current limiting circuit and the equivalent circuit are electrically connected bidirectionally, and the equivalent circuit and the V / A conversion circuit are electrically connected, the V / A conversion circuit and the measurement sampling circuit are electrically connected, and the measurement sampling circuit and the current limiting circuit are electrically connected.

[0007] Preferably, the panel includes a display screen part and a detection gun seat part, and the panel includes a power button, and a test button is installed below the power button, a manual / automatic selection switch is provided on one side of the test key, and an emergency stop switch is connected to one side of the manual / automatic selection switch, a LCD screen is installed above the power button, and a confirmation button is installed below the LCD screen, an up selection key is above the confirmation button, and a down selection key is below the confirmation button, the left side of the confirmation button is a left selection key, and the right side of the confirmation button is a right selection key, a save button is connected above the emergency stop switch, and a load button is provided above the save button.

[0008] Preferably, the detection gun seat part includes a European standard gun seat shell, and a ground wire is arranged at the inner center of the European standard gun seat shell, a PP interface and a CP interface are arranged above the ground wire, and a positive pole and a negative pole are arranged below the ground wire.

[0009] Preferably, the central processing module is electrically connected to a power button, a liquid crystal screen, an up selection button, a right selection button, a down selection button, a left selection button, a confirmation button, a test button, an emergency stop switch, a manual / automatic selection switch, a load button, and a save button.

[0010] Compared with the prior art, the beneficial effects achieved by the present invention are: First, the insulation detection tooling provided in the present invention can not only detect whether important lines are normal, but also detect whether the insulation resistance of the equipment meets the standard requirements. On a high-power charging pile, the diameter of the incoming cable will also increase, which makes it difficult to disassemble the equipment. Through the test of this tooling, there is no need to connect a high-power incoming cable, only an auxiliary low-voltage DC power supply is needed. This makes disassembly and assembly convenient, and maintenance convenient, which can effectively improve product production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a circuit block diagram of the present invention; Figure 2 It is a schematic diagram of a panel of the present invention.

[0012] Among them: 1. Power button; 2. LCD screen; 3. Up selection button; 4. Right selection button; 5. Down selection button; 6. Left selection button; 7. Confirm button; 8. Test button; 9. Emergency stop switch; 10. Manual / automatic selection switch; 11. Load button; 12. Save button; 13. European standard gun mount shell; 14. PP interface; 15. CP interface; 16. Ground wire; 17. Positive pole; 18. Negative pole. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] See also Figure 1 and Figure 2 , a tool for detecting the insulation performance of a DC output circuit, comprising a circuit and a panel, wherein the circuit comprises a central processing module, a drive module, a power supply, a step-up transformer, a low-voltage sampling module, a load switching circuit, a current limiting circuit, an equivalent circuit, a V / A conversion circuit, and a measurement sampling circuit; The load switching circuit is electrically connected to the low voltage sampling module and the central processing module measurement sampling circuit; The low-voltage sampling module is electrically connected to the central processing module, the central processing module is electrically connected to the current limiting circuit, the central processing module is electrically connected to the driving module, and the central processing module is electrically connected to the power supply; The current limiting circuit and the equivalent circuit are electrically connected bidirectionally, and the equivalent circuit and the V / A conversion circuit are electrically connected, the V / A conversion circuit and the measurement sampling circuit are electrically connected, and the measurement sampling circuit and the current limiting circuit are electrically connected.

[0015] In this embodiment, the power source is a 12V battery or a 12V adapter. In view of the characteristics of the circuit's low output power and high output voltage, the secondary winding of the high-frequency switching transformer has three sets of taps corresponding to DC 100V, 500V, and 1000V. The gear position can be selected as needed to switch the secondary winding taps and the corresponding output voltage sampling resistors at the same time. According to the sampling of the output voltage and current, the control circuit will change the conduction width of the switch device in time, so as to stably output the expected voltage and provide overvoltage and overcurrent protection. A switching circuit is added at the output load end, which can switch and test between the positive pole-negative pole; positive pole-PE; negative pole-PE.

[0016] Specifically, the panel includes a display screen part and a detection gun seat part, and the panel includes a power button 1, and a test button 8 is installed below the power button 1, a manual / automatic selection switch 10 is provided on one side of the test button 8, and an emergency stop switch 9 is connected to one side of the manual / automatic selection switch 10, a liquid crystal screen 2 is installed above the power button 1, and a confirmation button 7 is installed below the liquid crystal screen 2, an upward selection button 3 is above the confirmation button 7, and a downward selection button 5 is below the confirmation button 7, the left side of the confirmation button 7 is the left selection button 6, and the right side of the confirmation button 7 is the right selection button 4, a save button 12 is connected above the emergency stop switch 9, and a load button 11 is provided above the save button 12.

[0017] In this embodiment, the power button 1 is a power button, the LCD screen 2 is used to display the set voltage value and insulation resistance, and historical data and test time can also be queried. The upward selection key 3 can browse historical data, and the right selection key 4 can select the test voltage level and test position such as positive-negative pole; positive pole-PE; negative pole-PE. The downward selection key 5 can browse historical data, and the left selection key 6 can select the test voltage level and test position such as positive pole-negative pole; positive pole-PE; negative pole-PE. The confirmation button 7 determines the selected voltage level, and the test button 8 confirms the test voltage and then manually starts the test. The emergency stop switch 9 quickly cuts off the power supply. The manual / automatic selection switch 10 selects manual and needs to set the test voltage by yourself. The automatic test performs positive pole-negative pole; positive pole-PE; negative pole-PE tests according to the 500V voltage platform. The load button 11 enters the historical record for query, and the save button 12 saves the current data to the historical record.

[0018] Specifically, the detection gun seat part includes a European standard gun seat shell 13, and a ground wire 16 is arranged at the inner center of the European standard gun seat shell 13, a PP interface 14 and a CP interface 15 are arranged above the ground wire 16, and a positive electrode 17 and a negative electrode 18 are arranged below the ground wire 16.

[0019] In this embodiment, the Euro gun holder housing 13 matches the charging gun head to be tested, and the PP interface 14, CP interface 15, ground wire 16, positive pole 17, and negative pole 18 are all used to connect the charging gun head for testing.

[0020] Specifically, the central processing module and the power button 1, LCD screen 2, up selection button 3, right selection button 4, down selection button 5, left selection button 6, confirmation button 7, test button 8, emergency stop switch 9, manual / automatic selection switch 10, load button 11, and save button 12 are electrically connected.

[0021] In this embodiment, the circuit can be controlled by the central processing module by pressing different keys on the panel, and the purpose of human-computer interaction is achieved through the liquid crystal screen 2.

[0022] When in use, it mainly tests the insulation of the charging module and the DC output module. The equipment does not need to be powered by the main power supply, but only needs to provide an auxiliary power supply for the test. Insert the gun line into the tooling gun holder, and manually set the low voltage test insulation. After passing the low-voltage insulation test, you can switch to the automatic mode. The tooling will freely switch the positive pole-negative pole; positive pole-PE; negative pole-PE to test the insulation resistance and save the records. The tester can judge whether the circuit is correct by observing the insulation resistance value, and even if there is an error, it can be found and modified more conveniently.

[0023] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tool for detecting the insulation performance of a DC output circuit, comprising a circuit and a panel, characterized in that: The circuit includes a central processing module, a driving module, a power supply, a step-up transformer, a low-voltage sampling module, a load switching circuit, a current limiting circuit, an equivalent circuit, a V / A conversion circuit, and a measurement sampling circuit; The load switching circuit is electrically connected to the low voltage sampling module and the central processing module measurement sampling circuit; The low-voltage sampling module is electrically connected to the central processing module, the central processing module is electrically connected to the current limiting circuit, the central processing module is electrically connected to the driving module, and the central processing module is electrically connected to the power supply; The current limiting circuit and the equivalent circuit are electrically connected bidirectionally, and the equivalent circuit and the V / A conversion circuit are electrically connected, the V / A conversion circuit and the measurement sampling circuit are electrically connected, and the measurement sampling circuit and the current limiting circuit are electrically connected.

2. The device for detecting the insulation performance of a DC output circuit according to claim 1, characterized in that: The panel comprises a display screen portion and a detection gun seat portion, and the panel comprises a power button (1), and a test button (8) is installed below the power button (1), a manual / automatic selection switch (10) is arranged on one side of the test button (8), and an emergency stop switch (9) is connected to one side of the manual / automatic selection switch (10), a liquid crystal screen (2) is installed above the power button (1), and a confirmation button (7) is installed below the liquid crystal screen (2), an upward selection button (3) is above the confirmation button (7), and a downward selection button (5) is below the confirmation button (7), a left selection button (6) is on the left side of the confirmation button (7), and a right selection button (4) is on the right side of the confirmation button (7), a save button (12) is connected above the emergency stop switch (9), and a load button (11) is arranged above the save button (12).

3. The device for detecting the insulation performance of a DC output circuit according to claim 2, characterized in that: The detection gun seat portion comprises a European standard gun seat shell (13), and a ground wire (16) is arranged at the inner center of the European standard gun seat shell (13), a PP interface (14) and a CP interface (15) are arranged above the ground wire (16), and a positive electrode (17) and a negative electrode (18) are arranged below the ground wire (16).

4. The device for detecting the insulation performance of a DC output circuit according to claim 2, characterized in that: The central processing module is electrically connected to a power button (1), a liquid crystal display (2), an upward selection button (3), a right selection button (4), a downward selection button (5), a left selection button (6), a confirmation button (7), a test button (8), an emergency stop switch (9), a manual / automatic selection switch (10), a load button (11), and a save button (12).

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