Device and method for testing withstand voltage of high-voltage battery cluster

Abstract

The invention discloses a high-voltage battery cluster withstand voltage test device and method, and relates to the technical field of high-voltage battery clusters, the high-voltage battery cluster withstand voltage test device comprises a computer and a high-voltage battery cluster, the computer is connected with a program control booster used for controlling and outputting high-voltage direct current, and the program control booster is connected with a detection device used for detecting and controlling direct current high-voltage output. The detection device is connected with a judgment device used for judging whether the magnitude of the leakage current meets the requirement or not, and the judgment device is connected with a controller and an alarm device. Remote boosting, high voltage output and voltage emptying control are carried out on the boosting transformer through computer program control software, the enough safe distance between the high-voltage equipment tester and the boosting transformer is guaranteed, safety protection is improved, the electric leakage judgment device automatically judges the test result and feeds the test result back to the sound-light alarm device in real time, and the reliability of the high-voltage equipment tester is improved. And relevant change parameters in the test process are fed back to the computer, and relevant test data are automatically stored by the computer.

Description

Technical Field

[0001] This invention relates to the field of high-voltage battery cluster technology, specifically to a high-voltage battery cluster withstand voltage testing device and method. Background Technology

[0002] High-voltage battery clusters are often composed of multiple battery packs, which in turn often include multiple battery modules, which can be made up of multiple cells connected in series.

[0003] Currently, electrochemical energy storage has also seen large-scale development in power systems. Typical applications are gradually reaching the MWh level of a single container, with single battery pack port voltages reaching 1000V or even 1500V, and single battery pack charge / discharge currents reaching hundreds of amperes.

[0004] In existing technologies, withstand voltage tests require manual intervention to increase the voltage and trigger the test. During testing, the voltage needs to be raised to over 1500V DC, posing significant safety risks. After the test, the equipment must be allowed to slowly discharge to a safe voltage before the test parameters are observed, recorded manually, and the results confirmed. This process is time-consuming, inefficient, prone to errors, and the data is difficult to archive. Therefore, we propose a high-voltage battery cluster withstand voltage testing device and method to solve these problems. Summary of the Invention

[0005] The purpose of this invention is to provide a high-voltage battery cluster withstand voltage testing device and method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-voltage battery cluster withstand voltage testing device, comprising a computer and a high-voltage battery cluster, wherein the computer is connected to a programmable boost converter for controlling and outputting high-voltage DC power, the programmable boost converter is connected to a detection device for detecting and controlling the DC high-voltage output, the detection device is connected to a judgment device for determining whether the leakage current meets the requirements, the judgment device is connected to a controller and an alarm device, the controller is used to control the output of the high-voltage DC power and the duration of the entire high-voltage output, the alarm device is used to remind the tester of the test results, and the controller is connected to the high-voltage battery cluster.

[0007] The computer is used to issue control commands and to receive test results and test phenomena. The computer is connected to the detection device and the alarm device.

[0008] The programmable step-up transformer is a programmable step-up transformer, and the detection device is a leakage current detector.

[0009] The judgment device is a leakage current detection and judgment tester, and the controller is a general-purpose high-precision timing controller.

[0010] The alarm device is an audible and visual alarm.

[0011] A high-voltage battery cluster withstand voltage test method is described below:

[0012] S1: Equipment Connection; The programmable step-up transformer, detection device, and judgment device are connected through high-voltage DC cables and to the high-voltage battery cluster through high-voltage DC cables. Each device is grounded separately to avoid circulating current. The detection device, judgment device, and controller are connected to the computer through communication shielded cables.

[0013] S2: Test Procedure: The computer issues a test start command, and all devices begin operation. The programmable step-up transformer raises the voltage to the set voltage, the detection device starts working, and records the leakage current changes in real time with high precision. The test time is set via a timer. After the output voltage of the programmable step-up transformer stabilizes, the corresponding indicator light illuminates. The computer issues a test command, and the high-voltage DC output is sent to the high-voltage battery cluster. The timer and judgment device begin working, judging in real time whether the leakage current meets the set value and feeding back to the computer to control whether the test program continues. If it does not meet the value, the alarm device issues a warning, the emergency stop switch is disconnected, and the test is checked. If the value is met, the test continues. After the timer expires, the test results are displayed by the alarm device in the form of an audible and visual alarm, and the computer records and saves the test results. After the test process is completed, the step-up transformer will automatically discharge to ensure that there is no residual voltage in the high-voltage cable and to ensure the safety of the test personnel.

[0014] In step S1, the computer connects to the alarm device via wired or wireless means.

[0015] In step S2, the system determines in real time whether the leakage current meets the set value and feeds it back to the computer to control whether the test program should continue. If it does not meet the set value, the test program stops.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By using computer-controlled software to remotely step up the voltage of the transformer and control the output of high voltage and voltage venting, a sufficient safe distance is ensured between the personnel testing the high-voltage equipment and the personnel, thus improving safety protection.

[0018] 2. The leakage current detection device automatically judges the test results and feeds them back to the audible and visual alarm device in real time. It also feeds back the relevant changing parameters during the test to the computer, and the computer automatically saves the relevant test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the high-voltage battery cluster withstand voltage testing device in this invention;

[0020] Figure 2This is a schematic diagram of the high-voltage battery cluster withstand voltage test method in this invention;

[0021] Figure 3 This is a schematic diagram of the high-voltage battery cluster withstand voltage test circuit in this invention.

[0022] In the diagram: 1. Computer; 2. Programmable step-up transformer; 3. Detection device; 4. Judgment device; 5. Controller; 6. Alarm device; 7. High-voltage battery cluster. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1

[0025] Please see Figure 1-3 A high-voltage battery cluster withstand voltage testing device includes a computer 1 and a high-voltage battery cluster 7. The computer 1 is used to issue control commands and to receive test results and test phenomena. The computer 1 is connected to a detection device 3 and an alarm device 6. The computer 1 is connected to a programmable step-up transformer 2 for controlling and outputting high-voltage DC power. The programmable step-up transformer 2 is a programmable step-up transformer. The detection device 3 is a leakage current detector. The programmable step-up transformer 2 is connected to the detection device 3 for detecting and controlling the DC high-voltage output. The detection device 3 is connected to a judgment device 4 for judging whether the leakage current meets the requirements. The judgment device 4 is connected to a controller 5 and an alarm device 6. The judgment device 4 is a leakage current detection and judgment tester. The controller 5 is used to control the output of the high-voltage DC power and the entire high-voltage output time. The alarm device 6 is used to remind the tester of the test results. The controller 5 is a general-purpose high-precision timer controller. The alarm device 6 is an audible and visual alarm. The controller 5 is connected to the high-voltage battery cluster 7.

[0026] A high-voltage battery cluster withstand voltage test method is described below:

[0027] S1: Equipment connection; The programmable booster 2, detection device 3 and judgment device 4 are connected to each other through high voltage DC cables and to the high voltage battery cluster 7 through high voltage DC cables. Each device is grounded separately to avoid circulating current. The detection device 3, judgment device 4 and controller 5 are connected to the computer 1 through communication shielded cables. The computer 1 is connected to the alarm device 6 through wired or wireless means.

[0028] S2: Test Procedure: Computer 1 issues a test start command, all devices begin operation, the programmable booster 2 raises the voltage to the set voltage, the detection device 3 begins operation, and records the leakage current change value in real time with high precision. The test time is set through timer 5. After the output voltage of the programmable booster 2 stabilizes, the corresponding indicator light illuminates. Computer 1 issues a test command, and the high-voltage DC output is sent to the high-voltage battery cluster 7. Timer 5 and judgment device 4 begin operation, judging in real time whether the leakage current meets the set value and feeding back to computer 1 to control whether the test program continues. If it does not meet the set value, alarm device 6 issues a warning (through indicator light and buzzer). The emergency stop switch is disconnected and checked. If it meets the set value, the test continues. After the timer ends, the test result is displayed by alarm device 6 in the form of an audible and visual alarm. At the same time, the test result is recorded and saved by the computer. After the test process is completed, the booster transformer will automatically discharge to ensure that there is no residual voltage in the high-voltage cable and to ensure the safety of the test personnel.

[0029] like Figure 2 As shown, -T2 is a rectifier power supply used to rectify AC to DC output; -P1 is a live indicator light device used to display the DC output voltage value; -S1 and -S2 are circuit breakers used to cut off the output DC voltage; -T1 is a single-phase autotransformer used to output high-voltage DC; -C1 and -C2 are used for control signal coupling; -P2 is a leakage current detection device; -S4 is a switch for grounding control; -P5 is a live indicator used to display the line DC voltage; -R1 and -R2 are adjustable resistors used to fine-tune the output DC high voltage; -S3 is an emergency stop button, used in conjunction with -S4 in case of a fault. After -S3 is activated, -S4 will close. The circuit is connected for output circuit discharge. -P4 is a flashing indicator light, -P6 is a buzzer, and -P3 is a timer. -P3, -P2, -P4, and -P6 are interlocked. In case 1, after the timer ends, if the value detected by -P2 does not exceed the set requirement throughout the entire process, the indicator light on -P4 flashes, the buzzer on -P6 sounds, -P2 outputs test data, and the computer displays the test results. In case 2, if the value detected by -P2 exceeds the set value, the indicator light on -P4 flashes, the buzzer on -P6 sounds, -S3 cuts off the output, -S4 closes, and the circuit discharges. The high-voltage battery cluster is the object under test, and -A2 is the grounding point for the high-voltage battery cluster equipment casing.

[0030] Example 2

[0031] Please see Figure 1-3A high-voltage battery cluster withstand voltage testing device includes a computer 1 and a high-voltage battery cluster 7. The computer 1 is used to issue control commands and to receive test results and test phenomena. The computer 1 is connected to a detection device 3 and an alarm device 6. The computer 1 is connected to a programmable step-up transformer 2 for controlling and outputting high-voltage DC power. The programmable step-up transformer 2 is a programmable step-up transformer. The detection device 3 is a leakage current detector. The programmable step-up transformer 2 is connected to the detection device 3 for detecting and controlling the DC high-voltage output. The detection device 3 is connected to a judgment device 4 for judging whether the leakage current meets the requirements. The judgment device 4 is connected to a controller 5 and an alarm device 6. The judgment device 4 is a leakage current detection and judgment tester. The controller 5 is used to control the output of the high-voltage DC power and the entire high-voltage output time. The alarm device 6 is used to remind the tester of the test results. The controller 5 is a general-purpose high-precision timer controller. The alarm device 6 is an audible and visual alarm. The controller 5 is connected to the high-voltage battery cluster 7.

[0032] A high-voltage battery cluster withstand voltage test method is described below:

[0033] S1: Equipment connection; The programmable booster 2, detection device 3 and judgment device 4 are connected to each other through high voltage DC cables and to the high voltage battery cluster 7 through high voltage DC cables. Each device is grounded separately to avoid circulating current. The detection device 3, judgment device 4 and controller 5 are connected to the computer 1 through communication shielded cables. The computer 1 is connected to the alarm device 6 through wired or wireless means.

[0034] S2: Test Steps: Computer 1 issues a test start command, all devices start working, programmable booster 2 raises the voltage to the set voltage, detection device 3 starts working, records the leakage current change value in real time with high precision, the test time is set by timer 5, after the output voltage of programmable booster 2 stabilizes, the corresponding indicator light lights up, computer 1 issues a test command, high voltage DC output is sent to high voltage battery cluster 7, timer 5 and judgment device 4 start working, judge in real time whether the leakage current meets the set value and feeds back to computer 1 to control whether the test program continues, if not, it stops.

[0035] like Figure 2As shown, -T2 is a rectifier power supply used to rectify AC to DC output; -P1 is a live indicator light device used to display the DC output voltage value; -S1 and -S2 are circuit breakers used to cut off the output DC voltage; -T1 is a single-phase autotransformer used to output high-voltage DC; -C1 and -C2 are used for control signal coupling; -P2 is a leakage current detection device; -S4 is a switch for grounding control; -P5 is a live indicator used to display the line DC voltage; -R1 and -R2 are adjustable resistors used to fine-tune the output DC high voltage; -S3 is an emergency stop button, used in conjunction with -S4 in case of a fault. After -S3 is activated, -S4 will close. The circuit is connected for output circuit discharge. -P4 is a flashing indicator light, -P6 is a buzzer, and -P3 is a timer. -P3, -P2, -P4, and -P6 are interlocked. In case 1, after the timer ends, if the value detected by -P2 does not exceed the set requirement throughout the entire process, the indicator light on -P4 flashes, the buzzer on -P6 sounds, -P2 outputs test data, and the computer displays the test results. In case 2, if the value detected by -P2 exceeds the set value, the indicator light on -P4 flashes, the buzzer on -P6 sounds, -S3 cuts off the output, -S4 closes, and the circuit discharges. The high-voltage battery cluster is the object under test, and -A2 is the grounding point for the high-voltage battery cluster equipment casing.

[0036] The computer-controlled booster 2 is remotely boosted and outputs high voltage and voltage venting control through computer-controlled software, ensuring a sufficient safe distance between the test personnel and the high-voltage equipment, thus improving safety protection; the judgment device 4 automatically judges the test results and feeds the test results back to the alarm device 6 in real time, and feeds back the relevant changing parameters during the test to the computer 1, and the computer 1 automatically saves the relevant test data.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these 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 high-voltage battery cluster withstand voltage test device, comprising a computer (1) and a high-voltage battery cluster (7), characterized in that: The computer (1) is connected to a programmable booster (2) for controlling and outputting high-voltage direct current, the programmable booster (2) is connected to a detection device (3) for detecting and controlling direct current high-voltage output, the detection device (3) is connected to a judgment device (4) for judging whether the leakage current meets the requirements, the judgment device (4) is connected to a controller (5) and an alarm device (6), the controller (5) is used to control the outlet of the high-voltage direct current output and the entire high-voltage output time, the alarm device (6) is used to remind a tester of the test results, and the controller (5) is connected to a high-voltage battery cluster (7).

2. A high voltage battery cluster withstand voltage test device according to claim 1, characterized in that: The computer (1) is used to issue control instructions and to receive test results and test phenomena. The computer (1) is connected to a detection device (3) and an alarm device (6).

3. A high voltage battery cluster withstand voltage test device according to claim 1, characterized in that: The program-controlled booster (2) is a program-controlled boost transformer, and the detection device (3) is a leakage current detector.

4. A high voltage battery cluster withstand voltage test device according to claim 1, characterized in that: The judgment device (4) is a leakage current detection and judgment tester, and the controller (5) is a general-purpose high-precision timing controller.

5. The high-voltage battery cluster withstand voltage test device according to claim 1, characterized in that: The alarm device (6) is an audible and visual alarm.

6. A method for testing the withstand voltage of a high-voltage battery cluster, characterized in that: Using the test device described in any one of claims 1 to 5, the test method is as follows: S1: Equipment connection; the programmable booster (2), the detection device (3) and the judgment device (4) are connected via a high-voltage DC cable, and are connected to a high-voltage battery cluster (7) via the high-voltage DC cable. Each device is grounded separately to avoid circulating current. The detection device (3), the judgment device (4) and the controller (5) are connected to a computer (1) via a communication shielded cable. S2: Test steps: The computer (1) issues a test start command, and each device starts working. The programmable booster (2) raises the voltage to the set voltage, and the detection device (3) starts working, recording the leakage current change value in real time with high precision. The test time is set by the timer (5). After the output voltage of the programmable booster (2) is stable, the corresponding indicator light comes on, and the computer (1) issues a test command. The high-voltage direct current is output to the high-voltage battery cluster (7). The timer (5) and the judgment device (4) start working, judging in real time whether the leakage current meets the set value and feeding back to the computer (1) to control whether the test program continues. If not, the alarm device (6) issues a warning, disconnects the emergency stop switch and checks. If it meets, the test continues. After the timing ends, the test result is displayed by the alarm device (6) in the form of an audible and visual alarm, and the test result is recorded and saved by the computer. After the test process ends, the step-up transformer will discharge itself to ensure that there is no residual voltage in the high-voltage cable, ensuring the safety of the tester.

7. A high voltage battery cluster withstand voltage test method according to claim 6, characterized in that: In step S1, the computer (1) is connected to the alarm device (6) via wired or wireless means.

8. A high voltage battery cluster withstand voltage test method according to claim 6, characterized in that: In step S2, it is determined in real time whether the leakage current meets the set value and the value is fed back to the computer (1) to control whether the test program continues. If not, the test program stops.

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