Insulation resistance testing tool for ceramic assembly of high-voltage direct-current relay

Abstract

The utility model relates to the technical field of test tools, and discloses a high-voltage direct-current relay ceramic assembly insulation resistance test tool which comprises a lower insulation plate, an upper insulation plate and an aluminum oxide ceramic shell, one side of the lower insulation plate and one side of the upper insulation plate are respectively provided with an adsorption assembly enabling the lower insulation plate and the upper insulation plate to be connected, and the adsorption assemblies are connected with the aluminum oxide ceramic shell. A kovar alloy ring is fixedly installed on one side of the aluminum oxide ceramic shell, two copper contacts are fixedly installed on the other side of the aluminum oxide ceramic shell, and a lower installation cavity and an upper installation cavity are formed in the opposite sides of the lower insulating plate and the upper insulating plate respectively. According to the utility model, not only can an operator be prevented from holding the meter rod by hand when voltage is introduced in the testing process, the operation difficulty and the potential safety hazard are reduced, but also the deviation of the lower insulating plate and the upper insulating plate in the assembling process can be avoided, the lower insulating plate and the upper insulating plate can be conveniently assembled by a worker, and the working efficiency is improved. And the use convenience of the test tool is improved.

Description

Technical Field

[0001] This utility model relates to the field of testing fixture technology, and more specifically to a testing fixture for the insulation resistance of a high-voltage DC relay ceramic component. Background Technology

[0002] High-voltage DC relays are core components of new energy vehicles. In new energy vehicles, relays are required between the battery system and the motor controller. They act as isolation devices when the system is stopped and as connectors when the system is running, thus breaking down the circuit. With the trend towards higher voltages, the penetration rate of high-voltage DC relays continues to increase, and various automakers are upgrading to 800V fast charging.

[0003] In such a high-voltage working environment, it is essential to ensure that the insulation resistance between the metal contacts of the entire relay is at a reasonable level to avoid overload and short circuits during frequent high-voltage switching, which could easily lead to safety accidents.

[0004] The insulation resistance test of the ceramic component of the high voltage DC relay is generally performed by using a special testing equipment to test the two copper contact sub-components and one Kovar alloy sub-component of the relay component through a probe. Since a large voltage is applied during the test, there are certain safety hazards in the operation. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a high-voltage DC relay ceramic component insulation resistance testing fixture to solve the problems existing in the background art.

[0006] This utility model provides the following technical solution: a high-voltage DC relay ceramic component insulation resistance testing fixture, including a lower insulating plate, an upper insulating plate, and an alumina ceramic shell. Each of the lower and upper insulating plates has an adsorption component on one side to connect them. A Kovar alloy ring is fixedly installed on one side of the alumina ceramic shell, and two copper contacts are fixedly installed on the other side. The lower and upper insulating plates have equal-sized lower and upper mounting cavities on opposite sides, and the lower and upper mounting cavities are aligned. The alumina ceramic shell is disposed within the lower and upper mounting cavities. A lower groove communicating with the lower mounting cavity is opened on one side of the lower insulating plate, and a lower test copper connector extending from the lower insulating plate is provided in the lower groove. Two upper grooves are opened on the side of the upper insulating plate away from the upper mounting cavity, and both upper grooves have upper test copper connectors and through holes communicating with the upper mounting cavity.

[0007] As a further embodiment of this utility model, the lower test copper connector is detachably installed in the lower groove by means of a lower screw.

[0008] As a further embodiment of this utility model, the upper test copper connector is detachably installed in the upper groove by means of an upper screw.

[0009] As a further embodiment of this utility model, both the lower mounting cavity and the upper mounting cavity have chamfered edges.

[0010] As a further embodiment of this utility model, the adsorption component includes a lower mounting hole and an upper mounting hole. The lower mounting hole is opened on one side of the lower insulating plate, and the upper mounting hole is opened on one side of the upper insulating plate. A lower magnetic block is embedded in the lower mounting hole, and an upper magnetic block is embedded in the upper mounting hole, and the upper magnetic block and the lower magnetic block are attracted to each other.

[0011] As a further embodiment of this utility model, the top and bottom of the upper insulating plate are integrally formed with two symmetrically distributed positioning blocks, and one side of the positioning block is integrally formed with an inclined surface.

[0012] As a further embodiment of this utility model, two symmetrically distributed positioning grooves are provided at the top and bottom of the lower insulating plate, and the positioning grooves are adapted to the positioning blocks.

[0013] As a further embodiment of this utility model, the positioning block is inserted into the positioning groove to position the assembly of the lower insulating plate and the upper insulating plate.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. The device provided by this utility model is simple to operate and has good reliability. By designing a corresponding adapter part, it realizes the lead-out test of different metal sub-parts. The operator only needs to place the ceramic product in the test chamber and perform the test by clamping the probe of the device with the lead-out end. This can avoid the operator's hands needing to hold the probe when the voltage is applied during the test, thus reducing the difficulty of operation and safety hazards.

[0016] 2. This utility model, by providing a positioning groove and a positioning block, allows the positioning block to be inserted into the positioning groove during the assembly of the lower and upper insulating plates, thereby enabling the lower and upper insulating plates to be positioned and assembled. This avoids deviations between the lower and upper insulating plates during assembly, facilitates the assembly of the lower and upper insulating plates by the workers, and improves the convenience of using the testing fixture. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is an exploded structural diagram of the present invention.

[0019] Figure 3 This is a partially enlarged structural schematic diagram of the present invention.

[0020] The attached diagram is labeled as follows: 1. Lower insulating plate; 2. Upper insulating plate; 3. Upper test copper connector; 4. Lower test copper connector; 5. Lower groove; 6. Lower mounting cavity; 7. Positioning groove; 8. Lower magnetic block; 9. Lower mounting hole; 10. Chamfer; 11. Kovar alloy ring; 12. Alumina ceramic shell; 13. Copper contact; 14. Upper groove; 15. Upper screw; 16. Lower screw; 17. Upper mounting cavity; 18. Positioning block; 19. Bevel; 20. Upper mounting hole; 21. Upper magnetic block. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Reference Figures 1-3This utility model provides a high-voltage DC relay ceramic component insulation resistance testing fixture, including a lower insulating plate 1, an upper insulating plate 2, and an alumina ceramic housing 12. Adsorption components connecting the lower insulating plate 1 and the upper insulating plate 2 are provided on one side. A Kovar alloy ring 11 is fixedly installed on one side of the alumina ceramic housing 12, and two copper contacts 13 are fixedly installed on the other side. Lower mounting cavities 6 and 17 of equal specifications are respectively opened on opposite sides of the lower insulating plate 1 and the upper insulating plate 2, and the lower mounting cavities 6 and 17 are aligned. The alumina ceramic housing 12 is disposed within the lower mounting cavities 6 and 17. A lower groove 5 communicating with the lower mounting cavity 6 is opened on one side of the lower insulating plate 1, and a lower test copper connector 4 extending from the lower insulating plate 1 is provided in the lower groove 5, with the Kovar alloy ring 11 in contact with the lower test copper connector 4. Two copper contacts 13 are opened on the side of the upper insulating plate 2 away from the upper mounting cavity 17. The upper slot 14 has two upper test copper connectors 3, and each upper slot 14 has a through hole that communicates with the upper mounting cavity 17. The copper contact 13 passes through the through hole and contacts the upper test copper connector 3. The lower test copper connector 4 is installed in the lower slot 5. After the upper test copper connector 3 is installed in the upper slot 14, the alumina ceramic housing 12 is placed into the lower mounting cavity 6, and the modified Kovar alloy ring 11 on the alumina ceramic housing 12 contacts the lower test copper connector 4. Then, the upper insulating plate 2 and the lower insulating plate 1 are assembled by adsorption components. After assembly, the alumina ceramic housing 12 will enter the upper mounting cavity 17, and the copper contact 13 will pass through the through hole and contact the upper test copper connector 3. At this time, the test can be performed by clamping the probe of the device with the upper test copper connector 3 and the lower test copper connector 4. This avoids the need for the operator to hold the probe when voltage is applied during the test, reducing the difficulty of operation and safety hazards.

[0023] In this utility model, the lower test copper connector 4 is detachably installed in the lower recess 5 by the lower screw 16, and the upper test copper connector 3 is detachably installed in the upper recess 14 by the upper screw 15. When installing the upper test copper connector 3 and the lower test copper connector 4, the lower test copper connector 4 is installed in the lower recess 5 on the lower insulating plate 1 by the lower screw 16, and the upper test copper connector 3 is installed in the upper recess 14 on the upper insulating plate 2 by the upper screw 15. The lower mounting cavity 6 and the upper mounting cavity 17 are both provided with chamfered angles 10. The chamfered angles 10 facilitate the alumina ceramic shell 12 to enter the lower mounting cavity 6 and the upper mounting cavity 17.

[0024] Specifically, the adsorption assembly includes a lower mounting hole 9 and an upper mounting hole 20. The lower mounting hole 9 is located on one side of the lower insulating plate 1, and the upper mounting hole 20 is located on one side of the upper insulating plate 2. A lower magnetic block 8 is embedded in the lower mounting hole 9, and an upper magnetic block 21 is embedded in the upper mounting hole 20. The upper magnetic block 21 is attracted to the lower magnetic block 8. The top and bottom of the upper insulating plate 2 are integrally formed with two symmetrically distributed positioning blocks 18. One side of each positioning block 18 is integrally formed with a bevel 19. The top and bottom of the lower insulating plate 1 are both provided with two symmetrically distributed positioning grooves 7, which are adapted to the positioning blocks 18. The positioning blocks 18 are inserted into the positioning grooves 7, thereby positioning the assembly of the lower insulating plate 1 and the upper insulating plate 2. During the assembly of the upper insulating plate 2 and the lower insulating plate 1, the positioning block 18 on the upper insulating plate 2 is aligned with the positioning groove 7 on the lower insulating plate 1, so that the positioning block 18 is inserted into the positioning groove 7, thereby positioning and assembling the upper insulating plate 2 and the lower insulating plate 1, avoiding deviation between the lower insulating plate 1 and the upper insulating plate 2 during the assembly process, making it easier for the staff to assemble the lower insulating plate 1 and the upper insulating plate 2, and improving the convenience of using the testing fixture. After the lower insulating plate 1 and the upper insulating plate 2 are attached, the upper magnetic block 8 will attract the lower magnetic block 21 to connect the lower insulating plate 1 and the upper insulating plate 2, thereby assembling the lower insulating plate 1 and the upper insulating plate 2. At the same time, the inclined surface 19 facilitates the insertion of the positioning block 18 into the positioning groove 7.

[0025] The working principle of this utility model is as follows: In use, firstly, the lower test copper connector 4 is installed in the lower groove 5 on the lower insulating plate 1 using the lower screw 16. Then, the upper test copper connector 3 is installed in the upper groove 14 on the upper insulating plate 2 using the upper screw 15. Next, the alumina ceramic housing 12 is placed into the lower mounting cavity 6, and the modified Kovar alloy ring 11 on the alumina ceramic housing 12 is brought into contact with the lower test copper connector 4. Then, the upper insulating plate 2 and the lower insulating plate 1 are assembled. During the assembly of the upper insulating plate 2 and the lower insulating plate 1, the positioning block 18 on the upper insulating plate 2 is aligned with the positioning groove 7 on the lower insulating plate 1, so that the positioning block 18 is inserted into the positioning groove 7, thereby positioning and assembling the upper insulating plate 2 and the lower insulating plate 1, preventing the lower insulating plate 1 from colliding with the upper insulating plate 1. The deviation of the insulation plate 2 during assembly facilitates the assembly of the lower insulation plate 1 and the upper insulation plate 2 by the staff, improving the convenience of the test fixture. After the lower insulation plate 1 and the upper insulation plate 2 are attached, the upper magnetic block 8 will attract the lower magnetic block 21 to connect the lower insulation plate 1 and the upper insulation plate 2, thereby assembling the lower insulation plate 1 and the upper insulation plate 2. At this time, the alumina ceramic shell 12 will enter the upper mounting cavity 17, and the copper contact 13 will pass through the through hole to contact the upper test copper connector 3. At this time, the test can be performed by clamping the probe of the equipment with the upper test copper connector 3 and the lower test copper connector 4. This avoids the need for the operator to hold the probe when the voltage is applied during the test, reducing the difficulty of operation and safety hazards.

[0026] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0027] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. A high-voltage direct-current relay ceramic assembly insulation resistance test tool, comprising a lower insulating plate (1), an upper insulating plate (2) and an alumina ceramic shell (12), characterized in that: One side of the lower insulating plate (1) and the upper insulating plate (2) is provided with an adsorption assembly connecting the lower insulating plate (1) and the upper insulating plate (2), one side of the alumina ceramic shell (12) is fixedly installed with a Kovar alloy ring (11), the other side of the alumina ceramic shell (12) is fixedly installed with two copper contacts (13), the opposite side of the lower insulating plate (1) and the upper insulating plate (2) is respectively provided with a lower mounting cavity (6) and an upper mounting cavity (17) with the same size, and the lower mounting cavity (6) is aligned with the upper mounting cavity (17), the alumina ceramic shell (12) is arranged in the lower mounting cavity (6) and the upper mounting cavity (17), one side of the lower insulating plate (1) is provided with a lower embedding groove (5) in communication with the lower mounting cavity (6), the lower embedding groove (5) is provided with a lower test copper contact (4) extending out of the lower insulating plate (1), the upper insulating plate (2) is provided with two upper embedding grooves (14) away from the upper mounting cavity (17), the two upper embedding grooves (14) are provided with an upper test copper contact (3), and the two upper embedding grooves (14) are provided with a through hole in communication with the upper mounting cavity (17).

2. The high-voltage DC relay ceramic component insulation resistance test tool according to claim 1, characterized in that: The lower test copper contact (4) is detachably installed in the lower embedding groove (5) through a lower screw (16).

3. The high-voltage DC relay ceramic component insulation resistance test fixture of claim 1, wherein: The upper test copper contact (3) is detachably installed in the upper embedding groove (14) through an upper screw (15).

4. The high-voltage DC relay ceramic assembly insulation resistance test fixture of claim 1, wherein: The edge of the lower mounting cavity (6) and the upper mounting cavity (17) is provided with an inverted bevel (10).

5. The high-voltage DC relay ceramic assembly insulation resistance test fixture of claim 1, wherein: The adsorption assembly comprises a lower mounting hole (9) and an upper mounting hole (20), the lower mounting hole (9) is arranged on one side of the lower insulating plate (1), the upper mounting hole (20) is arranged on one side of the upper insulating plate (2), the lower mounting hole (9) is embedded with a lower magnetic block (8), the upper mounting hole (20) is embedded with an upper magnetic block (21), and the upper magnetic block (21) is adsorbed with the lower magnetic block (8).

6. The high-voltage DC relay ceramic assembly insulation resistance test fixture of claim 5, wherein: The top and bottom of the upper insulating plate (2) are integrally formed with two symmetrical positioning blocks (18), one side of the positioning block (18) is integrally formed with an inclined surface (19).

7. The high-voltage DC relay ceramic assembly insulation resistance test fixture of claim 6, wherein: The top and bottom of the lower insulating plate (1) are provided with two symmetrical positioning grooves (7), and the positioning grooves (7) are matched with the positioning blocks (18).

8. The high-voltage DC relay ceramic assembly insulation resistance test fixture of claim 7, wherein: The positioning block (18) and the positioning groove (7) are inserted, so that the assembly of the lower insulating plate (1) and the upper insulating plate (2) is positioned.

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