CN220231818U - Internal resistance test fixture - Google Patents

Abstract

The utility model relates to the technical field of test equipment, and particularly discloses an internal resistance test fixture which comprises a base, a support plate, a test probe and a limiting plate; wherein, the supporting plate is arranged on the base; the supporting plate is provided with a probe area, the probe area is provided with a plurality of probe holes, and the probe holes are arranged in an array; meanwhile, one end of the test probe is connected to the test equipment, and the other end of the test probe can pass through the probe hole and then is abutted to the test piece to be tested; the test probes are provided with a plurality of test probes, and the position of each test probe in the probe area can be independently adjusted; the limiting plate is detachably connected to the supporting plate; a plurality of limiting holes are formed in the limiting plate, and the limiting holes and the probe holes are arranged in a one-to-one correspondence mode along the vertical direction. The test probe can be abutted against different parts on the test piece to be tested, so that the internal resistance and other data of the test piece to be tested can be tested, the test precision is high, and the subsequent processing and manufacturing of the test piece to be tested can be facilitated.

Description

Internal resistance test fixture

Technical Field

The utility model relates to the technical field of test equipment, in particular to an internal resistance test fixture.

Background

In the production process of the battery pack, the internal resistance test is generally required to be performed on the battery cells and the battery modules of the battery pack so as to confirm that the battery cells and the battery modules have no internal defects and meet the electrical performance requirements, and for flat conductors such as serial aluminum tabs in the battery modules, the internal resistance is important for current carrying and temperature rise of the battery modules, so that the internal resistance test is required to be performed more accurately.

The prior common method is to test the internal resistance of the serial aluminum tabs by a Kelvin four-wire method, so as to eliminate wiring errors and improve the test precision of the internal resistance. However, in the prior art, the four probes of the jig used by the Kelvin four-wire method are fixed in position, so that the serial aluminum tabs which can be tested are single in model number, and therefore, the internal resistance test of the serial aluminum tabs with different sizes and different shapes cannot be met, and the production and the manufacture of products are further affected.

Disclosure of Invention

The utility model aims to provide an internal resistance test fixture, which aims to solve the problems that in the prior art, four probes of a fixture used by a Kelvin four-wire method are fixed, so that the serial aluminum tabs which can be tested are single in model number, the internal resistance test of serial aluminum tabs with different sizes and different shapes cannot be met, and the production and the manufacture of products are affected.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an internal resistance test fixture, which comprises:

the base is used for placing a test piece to be tested;

the supporting plate is arranged on the base; the supporting plate is provided with a probe area, the probe area is provided with a plurality of probe holes, and the plurality of probe holes are arranged in an array;

one end of the test probe is connected to the test equipment, and the other end of the test probe can pass through the probe hole and then is abutted to the test piece to be tested; the test probes are provided with a plurality of test probes, and the positions of the test probes in the probe area can be independently adjusted;

the limiting plate is detachably connected to the supporting plate; a plurality of limiting holes are formed in the limiting plate, and the limiting holes and the probe holes are arranged in a one-to-one correspondence along the vertical direction.

As an alternative scheme of the internal resistance test fixture, the test probe is provided with a limiting protrusion, and the limiting protrusion is located between the support plate and the limiting plate and can be abutted against the support plate or the limiting plate.

As an alternative scheme of the internal resistance testing jig, the internal resistance testing jig further includes an elastic member, and two ends of the elastic member are respectively abutted against the limiting plate and the limiting protrusion, so that the limiting protrusion always has a movement trend close to the supporting plate.

As an alternative scheme of the internal resistance test fixture, the base is provided with a mounting groove, and the mounting groove is used for placing the test piece to be tested.

As an alternative scheme of above-mentioned internal resistance test fixture, above-mentioned internal resistance test fixture still includes the fixed plate, and above-mentioned fixed plate can dismantle and locate in the above-mentioned mounting groove, and above-mentioned fixed plate can be followed the horizontal direction with above-mentioned test piece butt on the cell wall of above-mentioned mounting groove.

As an alternative scheme of the internal resistance testing jig, the internal resistance testing jig further comprises an adjusting connecting piece, a waist hole is formed in the fixing plate, and the adjusting connecting piece penetrates through the waist hole and is connected to the base; the fixing plate can slide in the horizontal direction in the mounting groove through the waist hole.

As an alternative scheme of the internal resistance test fixture, centering lines are arranged on the base, the fixing plate and the test piece to be tested, and the base, the fixing plate and the test piece to be tested can be adjusted through the centering lines.

As an alternative scheme of the internal resistance test fixture, the base is provided with a sliding groove, the supporting plate is provided with a sliding table, and the sliding table is slidably arranged in the sliding groove, so that the supporting plate can slide on the base along the horizontal direction.

As an alternative to the internal resistance test fixture, the test probe includes a voltage probe and a current probe, and at least two of the voltage probe and the current probe are provided.

As an alternative to the internal resistance test fixture, the internal resistance test fixture is an insulation fixture.

The beneficial effects of the utility model are as follows:

the internal resistance test fixture comprises a base, a supporting plate, a test probe and a limiting plate, wherein the base is used for placing a test piece to be tested. The backup pad is located on the base, and the top of test piece that awaits measuring is located to the interval, make backup pad and test piece that awaits measuring can be relative in vertical direction, wherein the backup pad has the probe region, the probe region is provided with a plurality of probe holes, a plurality of probe holes are the array setting, and test probe's one end is connected in test equipment, test probe's the other end can pass the probe hole back butt on test piece that awaits measuring, thereby realize test equipment to test the test of test piece that awaits measuring through the connection of probe, simultaneously, test probe is provided with a plurality of, every test probe can adjust the setting alone in probe region's position, and then the staff can make test probe butt different positions on test piece that awaits measuring, and can be applicable to the test piece that awaits measuring of different size types, with this internal resistance and other data test to the test piece that awaits measuring, its test accuracy is higher, can make things convenient for the subsequent processing and manufacturing of test piece that awaits measuring. The internal resistance test fixture further comprises a limiting plate, the limiting plate is detachably connected to the supporting plate, a plurality of limiting holes are formed in the limiting plate, the limiting holes and the probe holes are arranged in a one-to-one correspondence mode in the vertical direction, and therefore the test probes are limited through the limiting holes and the probe holes, deflection of the test probes is prevented, and the test accuracy is improved.

Drawings

Fig. 1 is a schematic structural diagram of an internal resistance test fixture according to an embodiment of the present utility model;

fig. 2 is an exploded view of the internal resistance test fixture according to the embodiment of the present utility model;

fig. 3 is a schematic diagram of a second structure of the internal resistance test fixture according to the embodiment of the present utility model.

In the figure:

1. a base; 11. a mounting groove; 12. a chute; 2. a support plate; 21. a probe region; 22. a probe hole; 23. a sliding table; 3. a test probe; 31. a limit protrusion; 4. a limiting plate; 41. a limiting hole; 5. a fixing plate; 51. waist holes; 6. adjusting the connecting piece; 7. centering lines; 8. a test piece to be tested; 9. an elastic member.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first location" and "second location" are two distinct locations and wherein the first feature is "above," "over" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is level above the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

The embodiment provides an internal resistance test fixture for testing a test piece 8 to be tested.

As shown in fig. 1 to 3, the internal resistance test fixture comprises a base 1, a support plate 2, a test probe 3 and a limit plate 4, wherein the base 1 is used for placing a test piece 8 to be tested. The support plate 2 is arranged on the base 1 and above the test piece 8 to be tested at intervals, so that the support plate 2 and the test piece 8 to be tested can be opposite in the vertical direction, wherein the support plate 2 is provided with a probe area 21, the probe area 21 is provided with a plurality of probe holes 22, and the probe holes 22 are arranged in an array. Alternatively, the probe holes 22 may have a diameter ranging from 0.5mm to 2mm, and the distance between adjacent two probe holes 22 may range from 1mm to 3mm.

One end of test probe 3 is connected in test equipment, the other end of test probe 3 can pass probe hole 22 back butt on test piece 8 that awaits measuring, thereby realize the test equipment to the detection of test piece 8 that awaits measuring through the connection of probe, simultaneously, test probe 3 is provided with a plurality of, every test probe 3 can be adjusted alone in the position of probe region 21 and set up, and then the staff can be according to the demand, make the different positions of test probe 3 butt on test piece 8 that awaits measuring, and can be applicable to test piece 8 that awaits measuring of different size types, with this internal resistance and other data test to test piece 8 that awaits measuring, its test accuracy is higher, can make things convenient for the subsequent processing manufacturing of test piece 8. Optionally, the test piece 8 to be tested is a series aluminum bar. Of course, the test piece 8 to be tested may be other devices, and the present embodiment is not particularly limited.

As shown in fig. 3, the internal resistance test fixture further includes a limiting plate 4, the limiting plate 4 is detachably connected to the supporting plate 2, and a plurality of limiting holes 41 are formed in the limiting plate 4, the plurality of limiting holes 41 and the plurality of probe holes 22 are arranged in a one-to-one correspondence manner along the vertical direction, so that the test probe 3 is limited through the limiting holes 41 and the probe holes 22, thereby preventing the test probe 3 from being skewed, and further improving the test precision. Optionally, the test probe 3 includes a voltage probe and a current probe, which are both provided with at least two, so that the internal resistance test of the test piece 8 to be tested can be implemented using the four-wire method principle, and the measurement is accurate and the data reproducibility is good.

Wherein, be provided with spacing protruding 31 on the test probe 3, spacing protruding 31 is located between backup pad 2 and the limiting plate 4, can the butt in backup pad 2 or limiting plate 4 to this is spacing in backup pad 2 and limiting plate 4 with test probe 3, prevents that test probe 3 from breaking away from backup pad 2 after passing probe hole 22, or break away from limiting plate 4 after passing spacing hole 41. In this embodiment, the limiting protrusion 31 and the test probe 3 are integrally formed, and the position of the test probe 3 passing through the probe hole 22 is adjusted by removing the limiting plate 4 from the supporting plate 2, so as to meet the test position requirement of the test probe 3. In other embodiments, the limiting protrusion 31 is detachably connected with the test probe 3, so that the limiting plate 4 is not required to be detached from the supporting plate 2, and only the limiting protrusion 31 and the test probe 3 are required to be separated, and then the positions of the limiting protrusion 31 and the test probe 3 are adjusted, so that the limiting protrusion 31 and the test probe 3 are conveniently realigned to enter different probe cards 22, and the test position requirement of the test probe 3 is met. Optionally, the internal resistance test fixture further includes an elastic element 9, two ends of the elastic element 9 are respectively abutted against the limiting plate 4 and the limiting protrusion 31, so that the limiting protrusion 31 always has a movement trend close to the supporting plate 2, and the limiting protrusion 31 drives the test probe 3 to be always attached to the test piece 8 to be tested, so that electrical contact is ensured.

As shown in fig. 1 and 2, the base 1 is provided with a mounting groove 11, and the mounting groove 11 is used for placing the test piece 8 to be tested, so that the test piece 8 to be tested is convenient to mount, and the test piece 8 to be tested is prevented from causing a stop to the mounting of the support plate 2. Meanwhile, the internal resistance test fixture further comprises a fixing plate 5, the fixing plate 5 is detachably arranged in the mounting groove 11, the fixing plate 5 can be used for abutting the test piece 8 to be tested on the groove wall of the mounting groove 11 along the horizontal direction, so that the test piece 8 to be tested is fixedly positioned, and after the fixing plate 5 is detached, the test piece 8 to be tested with different sizes can be fixed by replacing the fixing plates 5 with different sizes. Optionally, centering lines 7 are respectively arranged on the base 1, the fixing plate 5 and the test piece 8 to be tested, and the base 1, the fixing plate 5 and the test piece 8 to be tested can be centered and adjusted through the centering lines 7, so that the position accuracy of the test piece 8 to be tested is improved, and the test accuracy of the test piece 8 to be tested is further improved.

Further, the internal resistance test fixture further comprises an adjusting connecting piece 6, the fixing plate 5 is provided with a waist hole 51, the adjusting connecting piece 6 penetrates through the waist hole 51 and then is connected to the base 1, so that detachable connection of the fixing plate 5 and the base 1 can be achieved, the fixing plate 5 can slide in the horizontal direction in the mounting groove 11 through the waist hole 51, and therefore clamping of the fixing plate 5 and the wall of the mounting groove 11 to the test piece 8 to be tested can be achieved through adjustment of the position of the fixing plate 5 under the condition that the fixing plate 5 is not replaced. Optionally, the adjusting connector 6 is embedded in the fixed plate 5.

Further, the base 1 is provided with the chute 12, the supporting plate 2 is provided with the sliding table 23, and the sliding table 23 is arranged in the chute 12 in a sliding manner, so that the supporting plate 2 can slide on the base 1 along the horizontal direction, the position of the probe region 21 is adjusted, and the test of the test probe 3 on the test piece 8 to be tested is facilitated. Optionally, the internal resistance test fixture is an insulation fixture, so that the internal resistance test fixture can perform electrical insulation to prevent electrostatic interference. Further alternatively, the internal resistance test jig is made of bakelite, PTFE or nylon materials, has good dimensional stability, and is convenient to directly process and manufacture through a data machine tool.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. An internal resistance test fixture, characterized by comprising:

the base (1) is used for placing a test piece (8) to be tested;

the support plate (2) is arranged on the base (1); the support plate (2) is provided with a probe region (21), the probe region (21) is provided with a plurality of probe holes (22), and the plurality of probe holes (22) are arranged in an array;

the test probe (3), one end of the test probe (3) is connected to test equipment, and the other end of the test probe (3) can pass through the probe hole (22) and then is abutted to the test piece (8) to be tested; the number of the test probes (3) is plural, and the position of each test probe (3) in the probe area (21) can be independently adjusted;

the limiting plate (4) is detachably connected to the supporting plate (2); the limiting plate (4) is provided with a plurality of limiting holes (41), and the limiting holes (41) and the probe holes (22) are arranged in a one-to-one correspondence manner along the vertical direction.

2. The internal resistance test fixture according to claim 1, wherein the test probe (3) is provided with a limit protrusion (31), and the limit protrusion (31) is located between the support plate (2) and the limit plate (4) and can be abutted to the support plate (2) or the limit plate (4).

3. The internal resistance test jig according to claim 2, further comprising an elastic member (9), wherein both ends of the elastic member (9) are respectively abutted against the limiting plate (4) and the limiting protrusion (31), so that the limiting protrusion (31) always has a movement tendency close to the supporting plate (2).

4. The internal resistance test fixture according to claim 1, wherein the base (1) is provided with a mounting groove (11), and the mounting groove (11) is used for placing the test piece (8) to be tested.

5. The internal resistance test fixture according to claim 4, further comprising a fixing plate (5), wherein the fixing plate (5) is detachably arranged in the mounting groove (11), and the fixing plate (5) can abut the test piece (8) to be tested on the groove wall of the mounting groove (11) along the horizontal direction.

6. The internal resistance test fixture according to claim 5, further comprising an adjusting connector (6), wherein a waist hole (51) is formed in the fixing plate (5), and the adjusting connector (6) passes through the waist hole (51) and is connected to the base (1); the fixing plate (5) can slide in the horizontal direction in the mounting groove (11) through the waist hole (51).

7. The internal resistance test fixture according to claim 5, wherein centering lines (7) are arranged on the base (1), the fixing plate (5) and the test piece (8) to be tested, and the base (1), the fixing plate (5) and the test piece (8) to be tested can be adjusted in a centering manner through the centering lines (7).

8. The internal resistance test fixture according to claim 1, wherein the base (1) is provided with a sliding groove (12), the support plate (2) is provided with a sliding table (23), and the sliding table (23) is slidably arranged in the sliding groove (12), so that the support plate (2) can slide on the base (1) along the horizontal direction.

9. The internal resistance test fixture according to claim 1, wherein the test probe (3) comprises a voltage probe and a current probe, both of which are provided with at least two.

10. The internal resistance test jig according to any one of claims 1 to 9, wherein the internal resistance test jig is an insulating jig.