A withstand voltage test device and method based on SPWM technology

Abstract

The present invention discloses a withstand voltage test device and method based on SPWM technology, which relates to the technical field of withstand voltage test, including a test bench, a rear plate frame installed on the rear side of the test bench, a withstand voltage test mechanism installed in the middle of the test bench, and the withstand voltage test mechanism including a straight guide rail installed on the top of the rear plate frame, a movable seat installed on the straight guide rail, a telescopic cylinder pointing downward installed on the movable seat, a carrier plate installed on the lower output end of the telescopic cylinder, a tester and a positioning clamp for connecting the tester to a battery are respectively installed on the carrier plate; the withstand voltage test data under simulated battery shaking and centrifugal environment conditions are obtained, and the withstand voltage test data under more environmental conditions are obtained, so that the battery withstand voltage test data is more comprehensive and accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of withstand voltage testing, and in particular to a withstand voltage testing device and method based on SPWM technology. Background Art

[0002] SPWM technology is a control method based on sinusoidal pulse width modulation. Its basic principle is to adjust the width and frequency of the output pulses by comparing the phases of a reference sine wave signal with a triangle wave (or carrier) signal, thereby controlling voltage and current. Specifically, when the amplitude of the sine wave signal is greater than that of the triangle wave signal, the switching device turns on; otherwise, it turns off. This generates a pulse sequence with a sinusoidal pulse width variation, known as the SPWM waveform. By applying SPWM technology to battery withstand voltage test equipment, more accurate test data can be obtained to assess battery stability and safety under high-voltage conditions.

[0003] Disadvantages of traditional voltage test equipment: Traditional voltage test equipment generally requires manual control to connect the battery to the voltage test equipment, and the voltage test efficiency is relatively low. In addition, the environmental conditions of the voltage test are difficult to simulate the environmental conditions encountered by the battery in reality, making it difficult to obtain more comprehensive and accurate battery voltage test simulation data.

[0004] Therefore, it is necessary to provide a withstand voltage test device and method based on SPWM technology to solve the problems raised in the above background technology. Summary of the Invention

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a withstand voltage test device based on SPWM technology, comprising a test bench, a rear plate frame installed on the rear side of the test bench, a withstand voltage test mechanism installed in the middle of the test bench, the withstand voltage test mechanism comprising a straight guide rail installed on the top of the rear plate frame, a movable seat installed on the straight guide rail, a telescopic cylinder pointing downwards installed on the movable seat, a carrier plate installed on the lower output end of the telescopic cylinder, a tester and a positioning clamp for connecting the tester to the battery are respectively installed on the carrier plate, the withstand voltage test mechanism also comprises an environmental simulation system installed on the test bench, a test simulation disk is installed on the environmental simulation system, and a test simulation disk is installed on the test simulation disk. There is a belt conveyor for receiving batteries, and retaining clips installed on the test simulation disk are provided on both sides of the belt conveyor. The environmental simulation system includes a chassis installed on the test bench, a ball seat is installed on the chassis, a ball rod is installed on the ball seat, and the test simulation disk is installed on the ball rod. The test simulation disk and the chassis are connected by spring 2, and the spring 2 is distributed in multiple groups in a circle. A swivel coaxial with the ball seat is also rotatably installed on the chassis, and a motor 2 is also installed on the chassis. The output end of the motor 2 is installed with a driving wheel that drives the swivel to rotate. The swivel is installed with a telescopic cylinder 2 pointing upward, and the upper output end of the telescopic cylinder 2 is installed with a ball that contacts the test simulation disk.

[0006] Preferably, the straight guide rail is rotatably mounted on a rear plate frame, a motor 1 for driving the straight guide rail to rotate is mounted on the rear plate frame, the chassis is rotatably mounted on a test bench, a motor 3 for driving the chassis to rotate is mounted on the test bench, and the straight guide rail and chassis rotate or stop synchronously.

[0007] Preferably, the chassis is further provided with a telescopic cylinder three pointing upward, and multiple telescopic cylinders three are distributed along the outer circumference of the ball seat. A plane sensor for monitoring the horizontal condition of the chassis is installed at the upper output end of the telescopic cylinder three.

[0008] Preferably, the retaining clamp includes a telescopic cylinder four symmetrically arranged on the belt conveyor, the telescopic cylinder four points vertically to the belt conveyor, and the output end of the telescopic cylinder four is equipped with a strip for retaining the side of the battery.

[0009] Preferably, distance sensors are installed at both ends of the strip, and the distance sensors are used to monitor the distance between the ends of the strip and the battery.

[0010] Preferably, a pressure sensing strip in contact with the side surface of the battery is provided on the surface of the strip.

[0011] Preferably, the positioning clamp includes a hanger located below the carrier plate, the hanger is connected to the carrier plate by a spring, and elastic splint covers are respectively provided at both ends of the hanger, and the elastic splint covers at both ends correspond to the negative pole and positive pole of the battery respectively, and the elastic splint covers at both ends are respectively installed with negative pole rods and positive poles, and the negative pole rods and positive poles are respectively connected to the control box installed on the carrier plate.

[0012] Preferably, a receiver is installed at the center of the upper end of the hanger, and a laser locator is installed on the carrier plate, and the laser locator is used to detect the alignment of the receiver and the laser locator.

[0013] Preferably, a belt input device for battery input and a belt output device for battery output are respectively installed on both sides of the test bench.

[0014] A withstand voltage test method based on SPWM technology comprises the following steps:

[0015] Step 1: After the battery is transferred to the belt conveyor, the battery side is fixed with a retaining clip;

[0016] Step 2: Use the telescopic cylinder 1 to control the carrier plate to drive the positioning clamp to clamp the upper end of the battery, and connect the tester to the negative and positive electrodes of the battery;

[0017] Step 3: As needed, the second motor controls the rotation of the driving wheel, which drives the swivel to rotate, and the second telescopic cylinder controls the ball to move up and down, causing the chassis to shake.

[0018] Step 4: As needed, use motor 1 to control the straight guide rail and motor 3 to control the chassis to rotate or stop synchronously.

[0019] Compared with the prior art, the present invention provides a withstand voltage test device and method based on SPWM technology, which has the following beneficial effects:

[0020] The present invention adopts the design of structures such as a belt conveyor, a retaining clamp, a positioning clamp, an environmental simulation system, and a test simulation disk, so that during the battery withstand voltage test, the import and export, clamping and disassembly, and connection testing of the battery are performed in an automated manner, thereby improving the efficiency of the withstand voltage test. In particular, through the setting of the environmental simulation system, it is possible to simulate different shaking intensities of the battery, and perform a withstand voltage test on the battery in a shaking state, and the adjustment of the intensity of the battery shaking simulation is also more convenient and efficient. By controlling the synchronous rotation of the straight guide rail and the chassis, it is possible to simulate the withstand voltage test conditions when the battery is subjected to centrifugal force, thereby simulating the battery withstand voltage test data under the influence of the environment when the battery is in different road conditions, thereby making it possible to obtain withstand voltage test data under more environmental conditions during the battery withstand voltage test based on SPWM technology, making the battery withstand voltage test data more comprehensive and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of the voltage withstand test equipment based on SPWM technology;

[0022] Figure 2 Schematic diagram of the structure of the voltage withstand test mechanism of the present invention;

[0023] Figure 3 Schematic diagram of the structure of the positioning clamp in the present invention;

[0024] Figure 4 Schematic diagram of the structure of the retaining clip in the present invention;

[0025] Figure 5 Schematic diagram of the three-dimensional structure of the environmental simulation system of the present invention;

[0026] Figure 6 Schematic diagram of the cross-sectional structure of the environmental simulation system of the present invention;

[0027] Figure: 1, test bench; 2, pressure test mechanism; 3, belt input device; 4, belt output device; 11, rear plate frame; 21, straight guide rail; 22, moving seat; 23, telescopic cylinder 1; 24, carrier plate; 25, positioning clamp; 26, tester; 27, environmental simulation system; 28, test simulation disk; 29, belt conveyor; 210, retaining clamp; 211, motor 1; 251, spring 1; 252, hanger; 253, elastic splint cover; 254, receiver; 255, excitation Optical locator; 261, control box; 262, negative pole; 263, positive pole; 271, ball rod; 272, ball seat; 273, chassis; 274, spring 2; 275, swivel; 276, telescopic cylinder 2; 277, ball bearing; 278, motor 2; 279, driving wheel; 2710, motor 3; 2711, telescopic cylinder 3; 2712, plane sensor; 2101, telescopic cylinder 4; 2102, strip; 2103, distance sensor; 2104, pressure sensor strip. DETAILED DESCRIPTION

[0028] Reference Figures 1-6The present invention provides a technical solution: a withstand voltage test device based on SPWM technology, comprising a test bench 1, a rear plate frame 11 being installed at the rear side of the test bench 1, a withstand voltage test mechanism 2 being installed in the middle of the test bench 1, the withstand voltage test mechanism 2 comprising a straight guide rail 21 installed on the top of the rear plate frame 11, a movable seat 22 being installed on the straight guide rail 21, a telescopic cylinder 23 pointing downward being installed on the movable seat 22, a carrier plate 24 being installed at the lower output end of the telescopic cylinder 23, a tester 26 and a positioning clamp 25 for connecting the tester 26 to a battery being installed on the carrier plate 24, the withstand voltage test mechanism 2 further comprising an environmental simulation system 27 installed on the test bench 1, a test simulation disk 28 being installed on the environmental simulation system 27, a belt conveyor 29 for receiving batteries being installed on the test simulation disk 28, and the belt conveyor 2 9 is also provided with retaining clips 210 installed on the test simulation disk 28 on both sides. The environmental simulation system 27 includes a chassis 273 installed on the test bench 1, a ball seat 272 is installed on the chassis 273, and a ball rod 271 is installed on the ball seat 272. The test simulation disk 28 is installed on the ball rod 271. The test simulation disk 28 is connected to the chassis 273 through a spring 274. The spring 274 is distributed in multiple groups in a circle. A swivel 275 coaxial with the ball seat 272 is also rotatably installed on the chassis 273. A motor 278 is also installed on the chassis 273. The output end of the motor 278 is installed with a driving wheel 279 that drives the swivel 275 to rotate. A telescopic cylinder 276 pointing upward is installed on the swivel 275, and a ball 277 in contact with the test simulation disk 28 is installed on the upper output end of the telescopic cylinder 276.

[0029] In this embodiment, the straight guide rail 21 is rotatably mounted on the rear plate frame 11, and a motor 211 for driving the straight guide rail 21 to rotate is installed on the rear plate frame 11. The chassis 273 is rotatably mounted on the test bench 1, and a motor 2710 for driving the chassis 273 to rotate is installed on the test bench 1. The straight guide rail 21 and the chassis 273 rotate or stop synchronously.

[0030] In this embodiment, the chassis 273 is also provided with a telescopic cylinder three 2711 pointing upward, and multiple telescopic cylinders three 2711 are distributed along the outer circumference of the ball seat 272. The upper output end of the telescopic cylinder three 2711 is installed with a plane sensor 2712 for monitoring the horizontal condition of the chassis 273; before the battery is transmitted to the belt conveyor 29, the telescopic cylinder three 2711 controls the plane sensor 2712 to contact the test simulation disk 28, so that the test simulation disk 28 is in a horizontal state, so that the battery can be introduced into the belt conveyor 29.

[0031] In this embodiment, the retaining clamp 210 includes a telescopic cylinder 2101 symmetrically arranged on the belt conveyor 29, the telescopic cylinder 2101 points vertically to the belt conveyor 29, and the output end of the telescopic cylinder 2101 is installed with a strip 2102 for retaining the side of the battery; so that when the battery can be adjusted to the center line of the conveying direction of the belt conveyor 29, the negative pole 262 is aligned with the negative pole of the battery, and the positive pole 263 is aligned with the positive pole of the battery.

[0032] In this embodiment, distance sensors 2103 are installed at both ends of the strip 2102, and the distance sensors 2103 are used to monitor the distance between the end of the strip 2102 and the battery; when the battery is transferred to the belt conveyor 29, the distance between it and the battery is first monitored by the distance sensor 2103. When the monitoring values ​​of the distance sensors 2103 at both ends of the strip 2102 are equal, it is judged that the battery is in the middle of the belt conveyor 29. At this time, if the battery needs to be fixed or clamped, the battery is fixed by the fixing clamp 210 and the battery is clamped by the positioning clamp 25. If the position of the battery on the belt conveyor 29 needs to be adjusted, the monitoring values ​​of the distance sensors 2103 at both ends of the strip 2102 are used to complete the precise adjustment of the battery position.

[0033] In this embodiment, the surface of the strip 2102 is provided with a pressure sensing strip 2104 in contact with the side of the battery; when the battery is subjected to a pressure test, the pressure monitoring data of the pressure sensing strip 2104 in contact with the side of the battery is obtained. If the pressure monitoring data shows different pressure values, it is determined that the battery has abnormal deformation during the pressure test.

[0034] In this embodiment, the positioning clamp 25 includes a hanger 252 located below the carrier plate 24, and the hanger 252 is connected to the carrier plate 24 through a spring 251. Elastic splint covers 253 are respectively provided at both ends of the hanger 252, and the elastic splint covers 253 at both ends correspond to the negative pole and positive pole of the battery respectively. Negative pole rods 262 and positive poles 263 are respectively installed on the elastic splint covers 253 at both ends, and the negative pole rods 262 and positive poles 263 are respectively connected to the control box 261 installed on the carrier plate 24.

[0035] In this embodiment, a receiver 254 is installed at the center of the upper end of the hanger 252, and a laser locator 255 is installed on the carrier plate 24. The laser locator 255 is used to detect the alignment of the receiver 254 and the laser locator 255. Before the battery is subjected to a voltage test, the laser locator 255 illuminates the receiver 254. If the receiver 254 can receive the laser locator 255, it is determined that the hanger 252 is in its original position, so that the negative pole 262 is connected to the negative pole of the battery and the positive pole 263 is connected to the positive pole of the battery. Otherwise, it is determined that the hanger 252 is in a non-original position, and the battery voltage test is stopped, and the hanger 252 is inspected and repaired.

[0036] In this embodiment, a belt input device 3 for battery input and a belt output device 4 for battery output are respectively installed on both sides of the test bench 1; manual disassembly and installation are avoided, so that automated voltage resistance testing can be performed on batched batteries, thereby improving the efficiency of the voltage resistance test.

[0037] In specific implementation, it includes the following steps:

[0038] Step 1: After the battery is transferred to the belt conveyor 29, the battery side is fixed by the retaining clip 210;

[0039] Step 2: Use the telescopic cylinder 1 23 to control the carrier plate 24 to drive the positioning clamp 25 to clamp the upper end of the battery, and connect the tester 26 to the negative and positive electrodes of the battery;

[0040] Step 3: As needed, the second motor 278 controls the driving wheel 279 to rotate, which drives the swivel 275 to rotate, and the second telescopic cylinder 276 controls the ball 277 to move up and down, causing the chassis 273 to shake.

[0041] Step 4: Based on the requirements, the straight guide rail 21 is controlled by the motor 1 211 and the chassis 273 is controlled by the motor 3 2710 to rotate or stop synchronously.

[0042] Among them, according to the intensity of the battery shaking simulation required, the distance between the battery and the axis of the test simulation disk 28 can be adjusted by the belt conveyor 29 to simulate the different shaking intensities of the battery, thereby performing a voltage test on the battery in a shaking state; specifically, when the battery is required to deviate from the axis of the test simulation disk 28, the strip 2102, the elastic splint cover 253 and the battery on the belt conveyor 29 are all in a separated state. At this time, the battery is adjusted to deviate from the axis of the test simulation disk 28 by the belt conveyor 29 until the required distance is reached, and then the side of the battery is fixed by the retaining clamp 210, and then the moving seat 22 is controlled to move by the straight guide rail 21, so that the two elastic splint covers 253 are aligned with the negative and positive poles of the motor again, and then the carrier plate 24 is controlled to move toward the battery by the telescopic cylinder 1 23, so that the elastic splint cover 253 is clamped with the upper end of the motor, the negative pole rod 262 is connected to the negative pole of the battery, and the positive pole rod 263 is connected to the positive pole of the battery;

[0043] Among them, by controlling the synchronous rotation of the straight guide rail 21 and the chassis 273, the pressure test situation when the battery is subjected to centrifugal force can be simulated, thereby simulating the battery pressure test data under the influence of the environment when the battery is in different road conditions.

[0044] The above description is only a preferred specific embodiment of the invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A withstand voltage test device based on SPWM technology, comprising a test bench (1), a rear plate frame (11) being installed on the rear side of the test bench (1), characterized in that: A withstand voltage test mechanism (2) is installed in the middle of the test bench (1), and the withstand voltage test mechanism (2) includes a straight guide rail (21) installed on the top of the rear plate frame (11), a movable seat (22) is installed on the straight guide rail (21), a telescopic cylinder (23) pointing downward is installed on the movable seat (22), a carrier plate (24) is installed at the lower output end of the telescopic cylinder (23), a tester (26) and a positioning clamp (25) for connecting the tester (26) to the battery are respectively installed on the carrier plate (24), and the withstand voltage test mechanism (2) also includes an environmental simulation system (27) installed on the test bench (1), a test simulation disk (28) is installed on the environmental simulation system (27), a belt conveyor (29) for receiving batteries is installed on the test simulation disk (28), and retaining clamps (210) installed on the test simulation disk (28) are provided on both sides of the belt conveyor (29). The environmental simulation system (27) includes a chassis (273) mounted on the test bench (1), a ball seat (272) mounted on the chassis (273), a ball rod (271) mounted on the ball seat (272), the test simulation disk (28) mounted on the ball rod (271), the test simulation disk (28) and the chassis (273) are connected by a second spring (274), the second spring (274) is distributed in a plurality of groups in a circumference, and the chassis (273) is also provided with a rotating spring. A rotating ring (275) coaxial with the ball seat (272) is installed on the chassis (273); a second motor (278) is installed on the output end of the second motor (278) and a driving wheel (279) for driving the rotating ring (275) to rotate; a second telescopic cylinder (276) pointing upward is installed on the rotating ring (275); a ball (277) in contact with the test simulation disk (28) is installed on the upper output end of the second telescopic cylinder (276); The retaining clamp (210) includes a telescopic cylinder (2101) symmetrically arranged on the belt conveyor (29), the telescopic cylinder (2101) pointing vertically toward the belt conveyor (29), and a strip (2102) for retaining the side of the battery is installed at the output end of the telescopic cylinder (2101); The positioning clamp (25) includes a hanger (252) located below the carrier (24), the hanger (252) and the carrier (24) are connected via a spring (251), and elastic clamp covers (253) are respectively provided at both ends of the hanger (252), and the elastic clamp covers (253) at both ends correspond to the negative pole and the positive pole of the battery respectively, and the elastic clamp covers (253) at both ends are respectively installed with a negative pole rod (262) and a positive pole rod (263), and the negative pole rod (262) and the positive pole rod (263) are respectively connected to a control box (261) installed on the carrier (24).

2. The withstand voltage test equipment based on SPWM technology according to claim 1, characterized in that: The straight guide rail (21) is rotatably mounted on the rear plate frame (11), a motor (211) for driving the straight guide rail (21) to rotate is mounted on the rear plate frame (11), the chassis (273) is rotatably mounted on the test bench (1), a motor (2710) for driving the chassis (273) to rotate is mounted on the test bench (1), and the straight guide rail (21) and the chassis (273) rotate or stop synchronously.

3. The withstand voltage test equipment based on SPWM technology according to claim 2, characterized in that: The chassis (273) is also provided with a third telescopic cylinder (2711) pointing upwards. A plurality of the third telescopic cylinders (2711) are distributed along the outer circumference of the ball seat (272). A plane sensor (2712) for monitoring the horizontal condition of the chassis (273) is installed at the upper output end of the third telescopic cylinder (2711).

4. The withstand voltage test equipment based on SPWM technology according to claim 2, characterized in that: Distance sensors (2103) are installed at both ends of the strip (2102), and the distance sensors (2103) are used to monitor the distance between the ends of the strip (2102) and the battery.

5. The withstand voltage test equipment based on SPWM technology according to claim 2, characterized in that: The plate surface of the strip plate (2102) is provided with a pressure sensing strip (2104) in contact with the side surface of the battery.

6. The withstand voltage test equipment based on SPWM technology according to claim 2, characterized in that: A receiver (254) is installed at the center of the upper end of the hanger (252), and a laser locator (255) is installed on the carrier plate (24). The laser locator (255) is used to detect the alignment of the receiver (254) and the laser locator (255).

7. The withstand voltage test equipment based on SPWM technology according to claim 2, characterized in that: A belt input device (3) for battery input and a belt output device (4) for battery output are respectively installed on both sides of the test bench (1).

8. A withstand voltage test method based on SPWM technology, which uses a withstand voltage test device based on SPWM technology as claimed in any one of claims 2 to 7, characterized in that: It includes the following steps: Step 1: After the battery is transferred to the belt conveyor (29), the battery side is fixed by the retaining clip (210); Step 2: Control the carrier plate (24) through the telescopic cylinder (23) to drive the positioning clamp (25) to clamp the upper end of the battery, and connect the tester (26) to the negative and positive electrodes of the battery; Step 3: According to the demand, the second motor (278) controls the driving wheel (279) to rotate, the driving wheel (279) drives the rotating ring (275) to rotate, and the second telescopic cylinder (276) controls the ball (277) to move up and down, so that the chassis (273) shakes; Step 4: According to the requirements, the straight guide rail (21) is controlled by the motor 1 (211) and the chassis (273) is controlled by the motor 3 (2710) to rotate or stop synchronously.

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