Special-shaped battery test fixture

Abstract

The utility model provides a special-shaped battery test fixture, which comprises a fixture bottom plate, a toggle clamp assembly, a fixed probe assembly, a movable probe assembly, a support plate, a first guide rod, a second guide rod and a battery support plate, the device has the beneficial effects that the movable probe assembly is driven by the toggle clamp assembly to move left and right on the first guide rod and the second guide rod, the distance between movable probes on the movable probe assembly can be adjusted, the movable probes are aligned with anodes of special-shaped batteries for testing, cylindrical batteries of different sizes can be tested, the size is small, and the test efficiency is high. Contact is reliable, batch modular layout is met, the structure is simple, stability is good, and operation is easy.

Description

Technical Field

[0001] This utility model relates to the field of battery testing fixture technology, and more particularly to an irregularly shaped battery testing fixture. Background Technology

[0002] With the rapid development of electric vehicles, the power battery industry has been fully explored and has grown rapidly. To improve the battery density of power batteries, the country is now vigorously developing soft-pack lithium-ion batteries. All battery cells undergo rigorous testing, aging, and screening processes before leaving the factory, and battery testing fixtures are indispensable components in these processes.

[0003] During battery design and production, batteries frequently require testing equipment to examine various parameters and assess their electrical performance. In this testing process, the contact between the positive and negative terminals of the battery under test and the test points on the testing equipment is crucial. Poor contact can lead to increased contact resistance, affecting the accuracy of the test results. Therefore, the connection between the battery under test and the testing equipment places high demands on the system. During testing, fixtures are primarily used to connect the battery under test to the testing equipment, ensuring accurate transmission of information from the battery to the testing equipment.

[0004] In current battery manufacturing, due to different needs, there are various types and specifications of batteries, and the sizes of batteries of different specifications and types are also different. The distance between the positive and negative tabs of the battery varies greatly. As a result, when testing different models of batteries, it is necessary to use test fixtures corresponding to different models of batteries.

[0005] Currently, most battery testing fixtures use circular spring test probes to contact the positive and negative terminals of the battery. However, it is difficult to ensure that the circular spring test probes can make full contact with the positive and negative terminals of this type of pouch battery.

[0006] In the battery production process, probe modules are used to align probes with the battery electrodes to charge and discharge the battery. When the specifications and quantity of batteries change, the position and number of probes in contact with the battery also need to be adjusted accordingly. However, in existing equipment, the distance between the probes and the battery, as well as the height of the probes, are difficult to adjust and control, making the equipment cumbersome to operate and inconvenient to use. Summary of the Invention

[0007] The purpose of this utility model is to provide a novel irregular battery testing fixture to solve the above-mentioned technical problems. The fixture drives the moving probe assembly to move left and right on the first guide rod and the second guide rod through the elbow clamp assembly. The spacing of the moving probes on the moving probe assembly can be adjusted. The moving probes are aligned with the positive electrode of the irregular battery for testing. It can test cylindrical batteries of different sizes. It is small in size, has reliable contact, meets the requirements of batch modular layout, has a simple structure, good stability, and is easy to operate.

[0008] This utility model is achieved through the following technical solution:

[0009] A test fixture for irregularly shaped batteries includes a fixture base plate, an elbow clamp assembly, a fixed probe assembly, a movable probe assembly, a support plate, a first guide rod, a second guide rod, and a battery support plate. The elbow clamp assembly is located at the left end of the fixture base plate, the fixed probe assembly at the right end, and the battery support plate at the left side of the fixed probe assembly. The battery support plate has a battery mounting position. The movable probe assembly is located at the left side of the battery support plate, and the support plate is located at the left side of the movable probe assembly. The support plate has a second guide rod through-hole. One end of the first guide rod is inserted into the second guide rod through-hole on the support plate, and the other end of the first guide rod passes through the movable probe assembly and connects to the battery support plate. One end of the second guide rod is inserted into the second guide rod through-hole on the support plate, and the other end of the second guide rod passes through the movable probe assembly and connects to the battery support plate. The elbow clamp assembly is movably connected to the movable probe assembly. The irregularly shaped battery is mounted in the battery mounting position on the battery support plate. The fixed current probe and fixed voltage probe on the fixed probe assembly are aligned with the negative terminal of the irregularly shaped battery for testing, and the movable probe on the movable probe assembly is aligned with the positive terminal of the irregularly shaped battery for testing.

[0010] As a further step, the elbow clamp assembly includes an elbow clamp base, an elbow clamp handle, an elbow clamp connecting piece, an elbow clamp connecting rod, and an elbow clamp nut. The elbow clamp base is provided with a connecting piece mounting groove, and the elbow clamp connecting piece is installed in the connecting piece mounting groove on the elbow clamp base. One end of the elbow clamp connecting piece is connected to the elbow clamp handle, and the other end of the elbow clamp connecting piece is connected to one end of the elbow clamp connecting rod. The other end of the elbow clamp connecting rod is connected to the movable probe assembly and is fixed to the movable probe assembly by the elbow clamp nut.

[0011] As a further step, the moving probe assembly includes a moving probe plate and a moving probe. The upper part of the moving probe plate has a probe mounting hole, and the moving probe is installed in the probe mounting hole on the upper part of the moving probe plate. The middle part of the moving probe plate has a connecting rod through hole. The other end of the elbow clamp connecting rod passes through the connecting rod through hole in the middle part of the moving probe plate and is fixed to the moving probe plate by an elbow clamp nut. The lower two sides of the moving probe plate have first guide rod through holes. The other end of the first guide rod passes through the first guide rod through hole on one side of the lower part of the moving probe plate and connects to one side of the battery support plate. The other end of the second guide rod passes through the first guide rod through hole on the other side of the lower part of the moving probe plate and connects to the other side of the battery support plate. The elbow clamp handle drives the elbow clamp connecting rod to move, and the elbow clamp connecting rod drives the moving probe plate to move left and right on the first guide rod and the second guide rod. The spacing of the moving probe can be adjusted. The moving probe is aligned with the positive electrode of the irregularly shaped battery for testing.

[0012] As a further step, the fixed probe assembly includes a fixed probe plate, a fixed probe plastic part, a fixed current probe, a fixed voltage probe, and a fixed voltage probe sleeve. The fixed probe plate is mounted on the right end of the fixture base plate. The upper part of the fixed probe plate has a first groove. The fixed probe plastic part is mounted on the inner sidewall of the groove on the upper part of the fixed probe plate. The fixed probe plastic part has a current probe mounting position inside. The fixed current probe is embedded in the current probe mounting position inside the fixed probe plastic part. The fixed current probe has a voltage probe through hole in the middle. The fixed voltage probe sleeve passes through the voltage probe through hole in the middle of the fixed current probe and seamlessly fastens the fixed current probe to the fixed probe plastic part. One end of the fixed voltage probe passes through the fixed voltage probe sleeve and the voltage probe through hole in the middle of the fixed current probe and is in close contact with the positive electrode of the irregularly shaped battery. The other end of the fixed voltage probe is mounted in the first groove on the upper part of the fixed probe plate and extends outside the fixed probe plate. The fixed current probe and the fixed voltage probe are aligned with the negative electrode of the irregularly shaped battery for testing.

[0013] As a further step, the support plate is provided with a second groove.

[0014] As a further step, the rear end of the fixed current probe is provided with a limiting through hole.

[0015] As a further step, the elbow clamp connecting rod is fitted with an outer sleeve, which is embedded in the second groove on the support plate.

[0016] As a further step, the outer wall of the negative electrode of the irregularly shaped battery is provided with a limiting post, and the middle part of the negative electrode of the irregularly shaped battery is provided with a voltage contact post. The limiting post on the outer wall of the negative electrode of the irregularly shaped battery is embedded in the limiting through hole at the rear end of the fixed voltage probe and fixed to the rear end of the fixed voltage probe. The fixed voltage probe is tightly connected to and energized with the voltage contact post at the middle part of the negative electrode of the irregularly shaped battery.

[0017] As a further step, the right end of the fixture base plate is also provided with several wiring terminals.

[0018] As a further step, the irregularly shaped battery is a cylindrical battery.

[0019] As a further step, the cylindrical battery model is 18650 or 21700.

[0020] The beneficial effects of this utility model are as follows:

[0021] (1) The elbow clamp assembly drives the moving probe assembly to move left and right on the first guide rod and the second guide rod, and can adjust the spacing of the moving probes on the moving probe assembly. The moving probe is aligned with the positive electrode of the irregular battery for testing, and can test cylindrical batteries of different sizes. It is small in size, has reliable contact, meets the requirements of batch modular layout, has a simple structure, good stability, and is easy to operate.

[0022] (2) Through the fixed current probe and fixed voltage probe on the fixed probe assembly, a voltage contact post is provided in the middle of the negative electrode of the irregular battery. The limiting post on the outer side wall of the negative electrode of the irregular battery is embedded in the limiting through hole at the rear end of the fixed voltage probe and fixed to the rear end of the fixed voltage probe. The fixed voltage probe is tightly connected to the voltage contact post in the middle of the negative electrode of the irregular battery and is energized. It is aligned with the negative electrode of the irregular battery to perform voltage testing. The fixed current probe is aligned with the negative electrode of the irregular battery to perform current testing. It can test batteries of different sizes or shapes, and the contact is reliable. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the irregular battery testing fixture of this utility model;

[0024] Figure 2 This is a schematic diagram of the exploded structure of the irregular battery testing fixture of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the mobile probe assembly of this utility model;

[0026] Figure 4 This is a schematic diagram of the exploded structure of the mobile probe assembly of this utility model;

[0027] Figure 5 This is a schematic diagram of the fixed probe assembly structure of this utility model;

[0028] Figure 6 This is a schematic diagram of the exploded structure of the fixed probe assembly of this utility model;

[0029] Figure 7 This is a schematic diagram of the elbow clamp assembly structure of this utility model;

[0030] Figure 8 This is an exploded view of the elbow clamp assembly of this utility model;

[0031] Reference numerals: 1. Fixture base plate; 11. Terminal block; 2. Elbow clamp assembly; 21. Elbow clamp base; 22. Elbow clamp handle; 23. Elbow clamp connecting piece; 24. Elbow clamp connecting rod; 25. Elbow clamp nut; 26. Outer sleeve; 3. Fixed probe assembly; 31. Fixed probe plate; 310. First groove; 32. Fixed probe plastic part; 33. Fixed current probe; 330. Current probe through hole; 331. Limiting through hole; 34. Fixed voltage probe 35. Needle; 4. Fixed voltage probe sleeve; 5. Moving probe assembly; 6. Moving probe plate; 7. Probe mounting hole; 8. Connecting rod through hole; 9. First guide rod through hole; 10. Moving probe; 11. Support plate; 12. Second guide rod through hole; 13. Second groove; 14. First guide rod; 15. Second guide rod; 16. Battery support plate; 17. Battery mounting position; 18. Irregularly shaped battery; 19. Limiting post; 10. Voltage contact post. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0034] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0035] For reference Figures 1-8As shown, an irregularly shaped battery testing fixture includes a fixture base plate 1, an elbow clamp assembly 2, a fixed probe assembly 3, a movable probe assembly 4, a support plate 5, a first guide rod 6, a second guide rod 7, and a battery support plate 8. The elbow clamp assembly 2 is located at the left end of the fixture base plate 1, and the fixed probe assembly 3 is located at the right end of the fixture base plate 1. The battery support plate 8 is located on the left side of the fixed probe assembly 3, and a battery mounting position 81 is provided on the battery support plate 8. The movable probe assembly 4 is located on the left side of the battery support plate 8, and the support plate 5 is located on the left side of the movable probe assembly 4. The support plate 5 has a second guide rod through hole 51, and one end of the first guide rod 6 is inserted into the second guide rod on the support plate 5. Inside the through hole 51, the other end of the first guide rod 6 passes through the movable probe assembly 4 and is connected to the battery support plate 8. One end of the second guide rod 7 is inserted into the second guide rod through hole 51 on the support plate 5, and the other end of the second guide rod 7 passes through the movable probe assembly 4 and is connected to the battery support plate 8. The elbow clamp assembly 2 is movably connected to the movable probe assembly 4. The irregularly shaped battery 9 is installed in the battery mounting position 81 on the battery support plate 8. The fixed current probe 33 and the fixed voltage probe 34 on the fixed probe assembly 3 are aligned with the negative terminal of the irregularly shaped battery 9 for testing, and the movable probe 42 on the movable probe assembly 4 is aligned with the positive terminal of the irregularly shaped battery 5 for testing.

[0036] Preferably, the elbow clamp assembly 2 includes an elbow clamp base 21, an elbow clamp handle 22, an elbow clamp connecting piece 23, an elbow clamp connecting rod 24, and an elbow clamp nut 25. The elbow clamp base 21 is provided with a connecting piece mounting groove. The elbow clamp connecting piece 23 is installed in the connecting piece mounting groove on the elbow clamp base 21. One end of the elbow clamp connecting piece 23 is connected to the elbow clamp handle 22, and the other end of the elbow clamp connecting piece 23 is connected to one end of the elbow clamp connecting rod 24. The other end of the elbow clamp connecting rod 24 is connected to the moving probe assembly 4 and is fixed to the moving probe assembly 4 by the elbow clamp nut 25.

[0037] Preferably, the moving probe assembly 4 includes a moving probe plate 41 and a moving probe 42. The moving probe plate 41 has a probe mounting hole 410 on its upper part, and the moving probe 42 is installed in the probe mounting hole 410 on the upper part of the moving probe plate 41. The moving probe plate 41 has a connecting rod through hole 411 in its middle part, and the other end of the elbow clamp connecting rod 24 passes through the connecting rod through hole 411 in the middle part of the moving probe plate 41 and is fixed to the moving probe plate 41 by an elbow clamp nut 25. The lower two sides of the moving probe plate 41 have first guide rod through holes 412. The other end of the guide rod 6 passes through the first guide rod through hole 412 on the lower side of the movable probe plate 41 and is connected to one side of the battery support plate 8. The other end of the second guide rod 7 passes through the first guide rod through hole 412 on the other side of the lower part of the movable probe plate 41 and is connected to the other side of the battery support plate 8. The elbow clamp handle 22 drives the elbow clamp connecting rod 24 to move. The elbow clamp connecting rod 24 drives the movable probe plate 41 to move left and right on the first guide rod 6 and the second guide rod 7, and the spacing of the movable probe 42 can be adjusted. The movable probe 42 is aligned with the positive electrode of the irregularly shaped battery 9 for testing.

[0038] Preferably, the fixed probe assembly 3 includes a fixed probe plate 31, a fixed probe plastic part 32, a fixed current probe 33, a fixed voltage probe 34, and a fixed voltage probe sleeve 35. The fixed probe plate 31 is mounted on the right end of the fixture base plate 1. The fixed probe plate 31 has a first groove 310 on its upper part. The fixed probe plastic part 32 is mounted on the inner sidewall of the first groove 310 on the upper part of the fixed probe plate 31. The fixed probe plastic part 32 has a current probe mounting position inside, and the fixed current probe 33 is embedded in the current probe mounting position inside the fixed probe plastic part 32. The fixed current probe 33 has a central part... The voltage probe through hole 330 is used to pass through the voltage probe through hole 330 in the middle of the fixed current probe 33, and the fixed current probe 33 is seamlessly fastened to the fixed probe plastic part 32. One end of the fixed voltage probe 34 passes through the fixed voltage probe sleeve 35 and the voltage probe through hole 330 in the middle of the fixed current probe 33 and is in close contact with the positive electrode of the irregular battery 9. The other end of the fixed voltage probe 34 is installed in the first groove 310 on the upper part of the fixed probe plate 31 and extends outside the fixed probe plate 31. The fixed current probe 33 and the fixed voltage probe 34 are aligned with the negative electrode of the irregular battery 9 for testing.

[0039] Preferably, the support plate 5 is provided with a second groove 51.

[0040] Preferably, the fixed current probe 33 has a limiting through hole 331 at its rear end.

[0041] Preferably, the elbow clamp connecting rod 24 is fitted with an outer sleeve 26, which is embedded in the second groove 51 on the support plate 5.

[0042] Preferably, the outer wall of the negative electrode of the irregularly shaped battery 9 is provided with a limiting post 91, and the middle part of the negative electrode of the irregularly shaped battery 9 is provided with a voltage contact post 92. The limiting post 91 on the outer wall of the negative electrode of the irregularly shaped battery 9 is embedded in the limiting through hole 330 at the rear end of the fixed voltage probe 33 and fixed at the rear end of the fixed voltage probe 34. The fixed voltage probe 34 is tightly connected to and energized with the voltage contact post 92 in the middle part of the negative electrode of the irregularly shaped battery 9.

[0043] Preferably, the right end of the fixture base plate 1 is also provided with a number of wiring terminals 11.

[0044] Preferably, the irregularly shaped battery 9 is a cylindrical battery.

[0045] Preferably, the cylindrical battery model is 18650 or 21700.

[0046] Based on the disclosure and teachings of the above specification, those skilled in the art can make appropriate changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A test fixture for irregularly shaped batteries, characterized in that: The device includes a fixture base plate, an elbow clamp assembly, a fixed probe assembly, a movable probe assembly, a support plate, a first guide rod, a second guide rod, and a battery support plate. The elbow clamp assembly is located at the left end of the fixture base plate, the fixed probe assembly at the right end, and the battery support plate at the left side of the fixed probe assembly. The battery support plate has a battery mounting position. The movable probe assembly is located at the left side of the battery support plate, and the support plate at the left side of the movable probe assembly has a second guide rod through hole. One end of the first guide rod is inserted into the second guide rod through hole on the support plate, and the other end of the first guide rod passes through the movable probe assembly and connects to the battery support plate. One end of the second guide rod is inserted into the second guide rod through hole on the support plate, and the other end of the second guide rod passes through the movable probe assembly and connects to the battery support plate. The elbow clamp assembly and the movable probe assembly are movably connected. A shaped battery is mounted in the battery mounting position on the battery support plate. The fixed current probe and fixed voltage probe on the fixed probe assembly are aligned with the negative terminal of the shaped battery for testing, and the movable probe on the movable probe assembly is aligned with the positive terminal of the shaped battery for testing.

2. The irregularly shaped battery testing fixture according to claim 1, characterized in that: The elbow clamp assembly includes an elbow clamp base, an elbow clamp handle, an elbow clamp connecting piece, an elbow clamp connecting rod, and an elbow clamp nut. The elbow clamp base has a connecting piece mounting groove, and the elbow clamp connecting piece is installed in the connecting piece mounting groove on the elbow clamp base. One end of the elbow clamp connecting piece is connected to the elbow clamp handle, and the other end of the elbow clamp connecting piece is connected to one end of the elbow clamp connecting rod. The other end of the elbow clamp connecting rod is connected to the movable probe assembly and is fixed to the movable probe assembly by the elbow clamp nut.

3. The irregularly shaped battery testing fixture according to claim 2, characterized in that: The moving probe assembly includes a moving probe plate and a moving probe. The moving probe plate has a probe mounting hole at its upper part, and the moving probe is installed in the probe mounting hole at the upper part of the moving probe plate. The moving probe plate has a connecting rod through hole in its middle part. The other end of the elbow clamp connecting rod passes through the connecting rod through hole in the middle of the moving probe plate and is fixed to the moving probe plate by an elbow clamp nut. The lower part of the moving probe plate has first guide rod through holes on both sides. The other end of the first guide rod passes through the first guide rod through hole on one side of the lower part of the moving probe plate and connects to one side of the battery support plate. The other end of the second guide rod passes through the first guide rod through hole on the other side of the lower part of the moving probe plate and connects to the other side of the battery support plate. The elbow clamp handle drives the elbow clamp connecting rod to move, and the elbow clamp connecting rod drives the moving probe plate to move left and right on the first and second guide rods. The spacing of the moving probes can be adjusted. The moving probe is aligned with the positive terminal of the irregularly shaped battery for testing.

4. The irregularly shaped battery testing fixture according to claim 1, characterized in that: The fixed probe assembly includes a fixed probe plate, a fixed probe plastic part, a fixed current probe, a fixed voltage probe, and a fixed voltage probe sleeve. The fixed probe plate is mounted on the right end of the fixture base plate. The upper part of the fixed probe plate has a first groove. The fixed probe plastic part is mounted on the inner sidewall of the groove on the upper part of the fixed probe plate. The fixed probe plastic part has a current probe mounting position inside. The fixed current probe is embedded in the current probe mounting position inside the fixed probe plastic part. The middle part of the fixed current probe has a voltage probe through hole. The fixed voltage probe sleeve passes through the voltage probe through hole in the middle part of the fixed current probe and seamlessly fastens the fixed current probe to the fixed probe plastic part. One end of the fixed voltage probe passes through the fixed voltage probe sleeve and the voltage probe through hole in the middle part of the fixed current probe and is in close contact with the positive electrode of the irregularly shaped battery. The other end of the fixed voltage probe is mounted in the first groove on the upper part of the fixed probe plate and extends outside the fixed probe plate. The fixed current probe and the fixed voltage probe are aligned with the negative electrode of the irregularly shaped battery for testing.

5. The irregularly shaped battery testing fixture according to claim 1, characterized in that: The support plate is provided with a second groove.

6. The irregularly shaped battery testing fixture according to claim 4, characterized in that: The fixed current probe has a limiting through hole at its rear end.

7. The irregularly shaped battery testing fixture according to claim 5, characterized in that: The elbow clamp connecting rod is fitted with an outer sleeve, which is embedded in the second groove on the support plate.

8. The irregularly shaped battery testing fixture according to claim 6, characterized in that: The outer wall of the negative electrode of the irregularly shaped battery is provided with a limiting post, and the middle part of the negative electrode of the irregularly shaped battery is provided with a voltage contact post. The limiting post on the outer wall of the negative electrode of the irregularly shaped battery is embedded in the limiting through hole at the rear end of the fixed voltage probe and fixed at the rear end of the fixed voltage probe. The fixed voltage probe is tightly connected to the voltage contact post at the middle part of the negative electrode of the irregularly shaped battery and is energized.

9. The irregularly shaped battery testing fixture according to claim 1, characterized in that: The right end of the fixture base plate is also provided with several wiring terminals.

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