Cylindrical battery OCV test tool

Abstract

The utility model relates to the technical field of test tools, and provides a cylindrical battery OCV test tool, which comprises a base, two probe assemblies, two support blocks and a bidirectional threaded screw rod, and is characterized in that the two probe assemblies are oppositely arranged on the base; the supporting blocks are arranged on the base in a sliding manner, and the two supporting blocks are symmetrically arranged about the center line of the probe assembly; the two-way threaded screw rod is rotationally arranged on the base and is connected with the two supporting blocks through threads in a matched mode, and the center line of the two-way threaded screw rod is perpendicular to the center line of the probe assembly. According to the utility model, the bidirectional threaded screw rod and the two supporting blocks are arranged and matched with each other, so that the distance between the two supporting blocks can be adjusted to adapt to cylindrical batteries with different diameters, and the two supporting blocks can be always symmetrically arranged about the center line of the probe assembly to realize rapid centering of the cylindrical batteries; therefore, the detection efficiency of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of testing tooling, in particular to an OCV testing tooling for cylindrical batteries. Background Art

[0002] During the research and development of cylindrical batteries, relevant tests and verifications are required for the battery's charge and discharge performance. The OCV test is one of the tests to measure the performance of the battery cell. It can specifically test the open circuit voltage, AC internal resistance and shell voltage of the single cell.

[0003] The utility model with announcement number CN220367391U discloses a short-circuit test fixture for cylindrical batteries. The test fixture includes a base with a positioning mechanism for mounting cylindrical batteries. A push mechanism is provided on the base on both sides of the positioning mechanism. One of the push mechanisms is provided with a positive electrode test lead, which is used to drive the positive electrode test lead toward or away from the positioning mechanism. The other push mechanism is provided with a negative electrode test lead, which is used to drive the negative electrode test lead toward or away from the positioning mechanism. The positioning mechanism is used to adjust the position of the cylindrical battery so that the positive and negative electrodes of the cylindrical battery are aligned with the test ends of the positive and negative test leads, respectively. The cylindrical battery short-circuit test fixture is suitable for short-circuit testing of cylindrical lithium-ion batteries of different diameters and has a wide range of applications. The cylindrical battery short-circuit test fixture can independently complete short-circuit testing, reducing the workload of operators, greatly improving work efficiency, and saving labor costs.

[0004] In the above technical solution, in order to support and fix cylindrical batteries of different diameters, a positioning block that can slide with the base is set. However, the moving distance of the two positioning blocks is not easy to unify, resulting in the electrodes at both ends of the cylindrical battery being laterally offset relative to the test end, which is not conducive to improving the battery detection efficiency. Utility Model Content

[0005] In view of this, the present invention proposes a cylindrical battery OCV testing fixture, which can keep the cylindrical battery always centered when fixing batteries of different diameters, thereby improving the battery testing efficiency.

[0006] The technical solution of the present invention is implemented as follows: The present invention provides a cylindrical battery OCV test fixture, comprising a base, two probe assemblies, two support blocks and a bidirectional threaded screw, wherein:

[0007] The two probe assemblies are arranged oppositely on the base;

[0008] The support block is slidably arranged on the base, and the two support blocks are symmetrically arranged about the center line of the probe assembly;

[0009] The bidirectional threaded screw is rotatably arranged on the base and is respectively connected to the two support blocks through threaded cooperation, and the center line of the bidirectional threaded screw is perpendicular to the center line of the probe assembly.

[0010] On the basis of the above technical solution, preferably, the support block includes a fixing plate and a supporting plate, wherein:

[0011] The fixing plate is slidably arranged on the base and is connected to the bidirectional threaded screw by threaded engagement;

[0012] The support plate is fixedly arranged on a side of the fixing plate close to the center line of the probe assembly, and the top side of the support plate is higher than the top side of the fixing plate.

[0013] More preferably, the top side of the support plate is in an arc shape.

[0014] More preferably, the bottom side of the support plate is flush with the bottom side of the fixing plate.

[0015] On the basis of the above technical solution, preferably, it further comprises a sliding mechanism, wherein the sliding mechanism comprises a slide rail and a slider, wherein:

[0016] The slide rail is fixedly arranged on the base;

[0017] The sliding blocks are respectively fixed on the two supporting blocks and are slidably connected to the slide rails.

[0018] On the basis of the above technical solution, preferably, the probe assembly includes a fixing seat and a probe, wherein,

[0019] The fixing seat is arranged on the base, and the distance between the two fixing seats is adjustable;

[0020] The probe is fixed on the fixing seat.

[0021] More preferably, one of the fixing seats is fixedly arranged on the base, and the other fixing seat is slidably arranged on the base.

[0022] More preferably, it further comprises a push-pull hand clamp, which is fixedly arranged on the base, and an output end of which is fixedly connected to the fixing seat which is slidably connected to the base.

[0023] More preferably, the push-pull hand clamp includes a fixed cylinder, a sliding rod, a connecting rod and a handle, wherein:

[0024] The fixing cylinder is fixedly arranged on the base;

[0025] The sliding rod is inserted through and slidably disposed in the fixing cylinder, and one end of the sliding rod is fixedly connected to the fixing seat;

[0026] The connecting rod is rotatably arranged on the fixed cylinder;

[0027] The handle is rotatably arranged on an end of the sliding rod away from the fixing seat and is rotatably connected to the connecting rod.

[0028] More preferably, the probe comprises a cannula, a sliding needle and a spring, wherein:

[0029] The sleeve is fixedly arranged on the fixing seat;

[0030] The sliding needle is slidably arranged in the sleeve;

[0031] The spring is sleeved on the sliding needle, and one end of the spring abuts against a side of the sliding needle away from the supporting block.

[0032] The cylindrical battery OCV test fixture of the present invention has the following beneficial effects compared with the prior art:

[0033] (1) By setting a bidirectional threaded screw and two support blocks, and utilizing the cooperation between the two, not only can the spacing between the two support blocks be adjusted to adapt to cylindrical batteries of different diameters, but the two support blocks can also be always symmetrically arranged about the center line of the probe assembly, thereby realizing rapid centering of the cylindrical battery, thereby improving the battery detection efficiency;

[0034] (2) By having the two fixing seats fixedly connected and slidably connected to the base, and providing a push-pull hand clamp, the distance between the two probe assemblies can be easily adjusted, thereby quickly disassembling and assembling the cylindrical battery;

[0035] (3) By configuring the probe to include a sleeve, a sliding needle, and a spring, when testing cylindrical batteries, the sliding of the sliding needle and the support of the spring against the sliding needle can be utilized to make the test fixture adaptable to cylindrical batteries of different lengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 This is a three-dimensional diagram of a cylindrical battery OCV test tool of the present utility model;

[0038] Figure 2 This is a three-dimensional diagram of the support block in a cylindrical battery OCV test tool of the present invention;

[0039] Figure 3 This is a three-dimensional diagram of the push-pull hand clamp in a cylindrical battery OCV test tool of the present invention;

[0040] Figure 4 This is a three-dimensional diagram of a probe in a cylindrical battery OCV test tool of the present invention.

[0041] Among them: 1. Base; 2. Probe assembly; 21. Fixed seat; 22. Probe; 221. Sleeve; 222. Slide needle; 223. Spring; 3. Support block; 31. Fixed plate; 32. Support plate; 4. Bidirectional threaded screw; 5. Sliding mechanism; 51. Slide rail; 52. Slider; 6. Push-pull hand clamp; 61. Fixed cylinder; 62. Sliding rod; 63. Connecting rod; 64. Handle. DETAILED DESCRIPTION

[0042] The following will be combined with the specific embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] like Figure 1-4 As shown, a cylindrical battery OCV test tool of the present invention includes a base 1, two probe assemblies 2, two support blocks 3, a bidirectional threaded screw 4, a sliding mechanism 5 and a push-pull hand clamp 6, which is used to fix the cylindrical battery to perform the OCV test of the battery.

[0044] The base 1 is used to support other components.

[0045] The probe assembly 2 is used to connect the positive and negative electrodes of the cylindrical battery to the battery testing system. Since the positive and negative electrodes of the cylindrical battery are respectively located at the two ends of the cylindrical battery, the two probe assemblies 2 are arranged on the base 1 relative to each other.

[0046] The support block 3 is used to support cylindrical batteries. The positive and negative poles of the cylindrical batteries supported by the support block 3 should be aligned with the positions of the two probe assemblies 2. In order to make the support block 3 adapt to cylindrical batteries of different diameters, the support block 3 is slidably set on the base 1, and the two support blocks 3 are symmetrically set about the center line of the probe assembly 2. By adjusting the spacing and position of the two support blocks 3, the positions of cylindrical batteries of different diameters are adjusted so that the positive and negative poles of the batteries are aligned with the positions of the two probe assemblies 2.

[0047] The bidirectional threaded screw 4 is used to adjust the position of the support block 3. The bidirectional threaded screw 4 is rotatably set on the base 1 and is respectively connected to the two support blocks 3 through threaded cooperation. The center line of the bidirectional threaded screw 4 is perpendicular to the center line of the probe assembly 2. The thread directions at both ends of the bidirectional threaded screw 4 are opposite. When it rotates, it can drive the two support blocks 3 to move synchronously in opposite directions, that is, the moving distance of the two is always equal, the position of the center line of the two support blocks 3 remains unchanged, and the center line of the cylindrical battery supported by it will not be laterally offset, which is beneficial to improving the testing efficiency of the cylindrical battery.

[0048] like Figure 2 As shown, the support block 3 includes a fixed plate 31 and a support plate 32. The fixed plate 31 is slidably set on the base 1 and is connected to the bidirectional threaded screw 4 by threaded cooperation; the support plate 32 is fixedly set on the side of the fixed plate 31 close to the center line of the probe assembly 2, and the top side of the support plate 32 is higher than the top side of the fixed plate 31. When fixing the cylindrical battery, not only can the cylindrical battery be placed on the top position of the two support plates 32, but the cylindrical battery can also be clamped between the two support plates 32. By increasing the height of the support plate 32, the diameter range of the cylindrical battery adapted by the support block 3 can be increased.

[0049] The support block 3 is preferably configured to have an L-shaped cross section, that is, the bottom side of the support plate 32 is flush with the bottom side of the fixing plate 31 , which can reduce the space occupied by the support block 3 while maintaining the above-mentioned performance.

[0050] Since the top of the support plate 32 is used to support the cylindrical battery, it is preferred that the top side of the support plate 32 is configured to be in an arc shape to prevent the top of the support plate 32 from scratching the side wall of the battery.

[0051] The sliding mechanism 5 is used to improve the sliding stability of the support block 3. The sliding mechanism 5 includes a slide rail 51 and a slider 52. Figure 2 As shown, the slide rail 51 is fixed on the base 1, and the sliders 52 are respectively fixed on the two support blocks 3 and are slidably connected to the slide rail 51. Of course, the number of slide rails 51 and sliders 52 can be increased according to the actual installation space.

[0052] The probe assembly 2 includes a fixing base 21 and a probe 22. Figure 3 As shown, the fixing seat 21 is set on the base 1. In order to facilitate the disassembly and assembly of the cylindrical battery, the distance between the two fixing seats 21 is adjustable; the probe 22 is fixedly set on the fixing seat 21, one end of which is used to connect and conduct with the positive and negative poles of the cylindrical battery, and the other end is used to connect and conduct with the battery testing system.

[0053] In order to achieve adjustable spacing between the two fixing seats 21, as a preferred embodiment, one fixing seat 21 is fixedly set on the base 1, and the other fixing seat 21 is slidably set on the base 1. When disassembling and assembling the cylindrical battery, only one of the fixing seats 21 needs to be slid; at the same time, one probe 22 does not need to be moved, which is also conducive to maintaining the stability of the probe 22 connection line.

[0054] The push-pull hand clamp 6 is used to provide a unidirectional and stable driving force to the sliding fixed seat 21. The push-pull hand clamp 6 is fixedly set on the base 1, and its output end can only slide along the center line direction of the probe 22, and its output end is fixedly connected to the fixed seat 21 that is slidably connected to the base 1.

[0055] As a preferred embodiment, the push-pull hand clamp 6 includes a fixed cylinder 61, a sliding rod 62, a connecting rod 63 and a handle 64. Figure 3 As shown, the fixed cylinder 61 is fixedly set on the base 1, and its axis is parallel to the center line direction of the probe 22; the sliding rod 62 is inserted into and slidably set in the fixed cylinder 61, and one end of the sliding rod is fixedly connected to the fixed seat 21 that can slide; one end of the connecting rod 63 is rotatably set on the fixed cylinder 61; the handle 64 is rotatably set on the end of the sliding rod 62 away from the fixed seat 21, and is rotatably connected to the connecting rod 63; when the handle 64 is rotated, the sliding rod 62 can be driven to slide, thereby driving the fixed seat 21 connected to it to slide.

[0056] The probe 22 includes a sleeve 221, a sliding needle 222 and a spring 223. Figure 4 As shown, the sleeve 221 is fixedly set on the fixing seat 21; the sliding needle 222 is slidably set in the sleeve 221; the spring 223 is sleeved on the sliding needle 222, and one end thereof is abutted against the side of the sliding needle 222 away from the support block 3; the sliding needle 222 is used to connect and conduct with the positive and negative poles of the cylindrical battery. By sliding with the sleeve 221, the position of the sliding needle 222 can be adjusted, so that the tooling can adapt to batteries of different lengths. At the same time, the spring 223 abuts against the side of the sliding needle 222 away from the cylindrical battery, so that the sliding needle 222 can be close to the cylindrical battery to maintain the stability of its electrical connection.

[0057] The method of using the cylindrical battery OCV test tool of the utility model is as follows:

[0058] First, turn the handle 64 to increase the distance between the two probes 22, then place the cylindrical battery between the two support blocks 3, then turn the bidirectional threaded screw 4 to adjust the support height of the cylindrical battery so that the positive and negative poles of the cylindrical battery are aligned with the positions of the two probes 22 respectively, and finally turn the handle 64 in the opposite direction so that the two probes 22 are respectively against the positive and negative poles of the cylindrical battery, and then the OCV test of the cylindrical battery can be performed.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cylindrical battery OCV test tool, characterized by: It comprises a base (1), two probe assemblies (2), two support blocks (3) and a bidirectional threaded screw (4), wherein: The two probe assemblies (2) are arranged opposite to each other on the base (1); The support block (3) is slidably arranged on the base (1), and the two support blocks (3) are symmetrically arranged about the center line of the probe assembly (2); The bidirectional threaded screw (4) is rotatably arranged on the base (1) and is respectively connected to the two support blocks (3) through threaded engagement, and the center line of the bidirectional threaded screw (4) is perpendicular to the center line of the probe assembly (2).

2. The cylindrical battery OCV test fixture according to claim 1, characterized in that: The support block (3) comprises a fixing plate (31) and a supporting plate (32), wherein: The fixing plate (31) is slidably arranged on the base (1) and is connected to the bidirectional threaded screw (4) through threaded engagement; The support plate (32) is fixedly arranged on one side of the fixing plate (31) close to the center line of the probe assembly (2), and the top side of the support plate (32) is higher than the top side of the fixing plate (31).

3. The cylindrical battery OCV test fixture according to claim 2, characterized in that: The top side of the support plate (32) is in an arc shape.

4. The cylindrical battery OCV test fixture according to claim 3, characterized in that: The bottom side of the support plate (32) is flush with the bottom side of the fixing plate (31).

5. The cylindrical battery OCV testing tool according to claim 1, characterized in that: It also includes a sliding mechanism (5), which includes a sliding rail (51) and a slider (52), wherein: The slide rail (51) is fixedly arranged on the base (1); The sliding blocks (52) are respectively fixedly arranged on the two supporting blocks (3) and are slidably connected to the slide rails (51).

6. The cylindrical battery OCV testing tool according to claim 1, characterized in that: The probe assembly (2) comprises a fixing seat (21) and a probe (22), wherein: The fixing seat (21) is arranged on the base (1), and the distance between the two fixing seats (21) is adjustable; The probe (22) is fixedly arranged on the fixing seat (21).

7. The cylindrical battery OCV testing tool according to claim 6, characterized in that: One of the fixing seats (21) is fixedly arranged on the base (1), and the other fixing seat (21) is slidably arranged on the base (1).

8. The cylindrical battery OCV testing tool according to claim 7, characterized in that: It also includes a push-pull hand clamp (6), which is fixedly arranged on the base (1), and its output end is fixedly connected to the fixed seat (21) that is slidably connected to the base (1).

9. The cylindrical battery OCV testing tool according to claim 8, characterized in that: The push-pull hand clamp (6) comprises a fixed cylinder (61), a sliding rod (62), a connecting rod (63) and a handle (64), wherein: The fixing cylinder (61) is fixedly arranged on the base (1); The sliding rod (62) penetrates and is slidably disposed in the fixing cylinder (61), and one end thereof is fixedly connected to the fixing seat (21); The connecting rod (63) is rotatably mounted on the fixed cylinder (61); The handle (64) is rotatably arranged on one end of the sliding rod (62) away from the fixing seat (21) and is rotatably connected to the connecting rod (63).

10. The cylindrical battery OCV testing tool according to claim 6, characterized in that: The probe (22) includes a sleeve (221), a sliding needle (222) and a spring (223), wherein: The sleeve (221) is fixedly arranged on the fixing seat (21); The sliding needle (222) is slidably arranged in the sleeve (221); The spring (223) is sleeved on the sliding needle (222), and one end of the spring (223) is in contact with a side of the sliding needle (222) away from the support block (3).

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