Angle self-adapting adjustment probe

Abstract

The application provides a kind of angle self-adapting regulation probe in the technical field of battery testing equipment, comprising: current probe, upper portion is provided with threaded section;Lower spring, is sleeved on current probe;Spherical slide, is sleeved on current probe, is located above lower spring;Plane slide, is sleeved on current probe, is located above spherical slide;Plastic seat, is sleeved on current probe, is located above plane slide;Teflon tape, is located at the bottom of plastic seat;Upper spring, is sleeved on current probe, is located above plastic seat;Lower hexagon nut, is locked in current probe by threaded section, is located above upper spring;Welding copper sheet, is sleeved on current probe, is located above lower hexagon nut;Upper hexagon nut, is locked in current probe by threaded section, is located above welding copper sheet.The application has the advantages that: the contact area of probe and pole is increased, thereby guaranteeing the charge and discharge test performance and safety, and reducing energy loss.

Description

Technical Field

[0001] The present invention relates to the technical field of battery testing equipment, and in particular to an angle self-adapting adjustment probe. Background Art

[0002] Lithium batteries are composed of several cells connected in series and parallel. After the cells are produced, they need to be formed into capacities. Formation is the initial charge and discharge of the cells to activate the internal chemical substances and form a passivation layer on the surface of the electrode material. Capacity separation is the capacity sorting of the cells to screen out cells with similar performance and assemble lithium batteries.

[0003] During the charging and discharging process, a probe is required to press the battery cell's poles together and pass a large current for charging and discharging. However, during the actual pressing process, due to the long-term use of the probe module or the assembly accuracy of the charging and discharging equipment, the bottom of the probe often cannot fully contact the pole surface, that is, the probe will be skewed at a certain angle, which will increase the contact resistance between the probe and the pole. Since W (heating power) = I 2 (current passing through) × R (contact resistance), which will cause the probe and battery cell to heat up rapidly, which will not only affect the charge and discharge test performance, cause energy loss, but may even create safety hazards.

[0004] Although there are probes on the market that claim to have ±3° angle adaptation, this type of probe uses the assembly gap between the probe metal rod and the probe base as an adaptive angle function. A slight pull on the wire often causes a larger tilt angle, which cannot meet the requirement of increasing the contact area between the probe and the pole.

[0005] Therefore, how to provide an angle-adaptive adjustment probe to increase the contact area between the probe and the pole has become a technical problem that needs to be solved urgently. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an angle-adaptive adjustment probe to increase the contact area between the probe and the pole.

[0007] The present invention is implemented as follows: an angle adaptive adjustment probe, comprising:

[0008] a current probe having at least one threaded section on its upper portion;

[0009] a lower spring, sleeved on the current probe and located at the lower part of the current probe;

[0010] a spherical slide plate, sleeved on the current probe, located above the lower spring, and abutting against the lower spring;

[0011] A flat slide plate is sleeved on the current probe and is located above the spherical slide plate;

[0012] a plastic seat, sleeved on the current probe and located above the planar slide;

[0013] a layer of Teflon tape, disposed on the bottom surface of the plastic seat;

[0014] an upper spring, sleeved on the current probe and located above the plastic seat;

[0015] a lower hexagonal nut, locked on the current probe through the threaded section, located above the upper spring, and causing the upper spring to be in a compressed state;

[0016] a piece of welded copper sheet, sleeved on the current probe and located above the lower hexagonal nut;

[0017] an upper hexagonal nut, locked on the current probe through the threaded section and located above the welding copper sheet;

[0018] a copper nose;

[0019] A flexible wire has one end connected to the soldered copper sheet and the other end connected to the copper nose.

[0020] Furthermore, the bottom surface of the current probe is provided with a tooth surface.

[0021] Furthermore, the flexible wire is welded to the welding copper sheet and the copper nose.

[0022] The advantages of the present invention are:

[0023] By arranging a spherical slide, a flat slide and a plastic seat on the current probe from bottom to top, and a layer of Teflon tape on the bottom of the plastic seat to reduce the friction coefficient, the lateral force generated when the probe is pressed against the battery cell's pole will push the probe in the other direction through the spherical slide and the flat slide, so that the probe remains perpendicular to the pole surface, thereby increasing the contact area between the probe and the pole and reducing the contact internal resistance, thereby greatly ensuring the performance and safety of charge and discharge tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Fig. 1 It is a structural schematic diagram of an angle adaptive adjustment probe of the present invention.

[0026] Fig. 2 This is a schematic diagram of the use status of an angle adaptive adjustment probe of the present invention.

[0027] Marking Description:

[0028] 100-An angle adaptive adjustment probe, 1-Current probe, 2-Lower spring, 3-Spherical slide, 4-Flat slide, 5-Plastic seat, 6-Teflon tape, 7-Upper spring, 8-Lower hexagonal nut, 9-Welding copper sheet, 10-Upper hexagonal nut, 20-Copper nose, 30-Flexible wire, 40-Battery core, 11-Tooth surface. DETAILED DESCRIPTION

[0029] The embodiment of the present invention provides an angle-adaptive adjustment probe 100, which solves the technical problem in the prior art that the bottom of the probe cannot fully contact with the surface of the pole, increases the contact resistance between the probe and the pole, causes the probe and the battery cell to heat up rapidly, which not only affects the charge and discharge test performance, causes energy loss, but may even create safety hazards. The embodiment of the present invention achieves the technical effect of increasing the contact area between the probe and the pole, thereby ensuring the charge and discharge test performance and safety, and reducing energy loss.

[0030] The technical solution in the embodiment of the present invention is to solve the above-mentioned problem. The overall idea is as follows: when the probe 100 generates a lateral force, the spherical slide 3 and the flat slide 4 push the probe 100 in the other direction, so that the probe 100 remains perpendicular to the surface of the pole, thereby increasing the contact area between the probe 100 and the pole, and ensuring the performance and safety of the charge and discharge test.

[0031] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0032] Please refer to Figs. 1-2 As shown, a preferred embodiment of an angle adaptive adjustment probe 100 of the present invention includes:

[0033] A current probe 1 having at least one threaded section (not shown) on its upper portion; the current probe 1 is used to charge and discharge the battery cell 40; the threaded section is used to be threadedly connected to the lower hexagonal nut 8 and the upper hexagonal nut 10;

[0034] A lower spring 2 is sleeved on the current probe 1 and located at the lower part of the current probe 1, and is used to transmit the lateral force of the current probe 1 to the spherical slide 3, while providing elastic force to tightly fit the current probe 1 to the battery cell 40;

[0035] a spherical slide 3, sleeved on the current probe 1, located above the lower spring 2, and abutting against the lower spring 2;

[0036] A flat slide 4 is mounted on the current probe 1 and is located above the spherical slide 3. Both the spherical slide 3 and the flat slide 4 are made of a material with an extremely low friction coefficient, such as Teflon, and are used to provide reverse thrust when the current probe 1 generates a lateral force.

[0037] A plastic seat 5 is sleeved on the current probe 1 and is located above the planar slide 4;

[0038] A layer of Teflon tape 6 is provided on the bottom surface of the plastic seat 5 to reduce friction between the plastic seat and the flat slide 4;

[0039] An upper spring 7 is sleeved on the current probe 1 and located above the plastic seat 5, and is used to pre-tension the components so that the probe 100 does not loosen in the initial state;

[0040] a lower hexagonal nut 8, which is locked on the current probe 1 through the threaded section and is located above the upper spring 7, and puts the upper spring 7 into a compressed state;

[0041] A piece of welded copper sheet 9 is sleeved on the current probe 1 and located above the lower hexagonal nut 8;

[0042] An upper hexagonal nut 10, locked on the current probe 1 through the threaded section, located above the welding copper sheet 9;

[0043] A copper nose 20 for power input;

[0044] A flexible wire 30 has one end connected to the welding copper sheet 9 and the other end connected to the copper nose 20.

[0045] The bottom surface of the current probe 1 is provided with a tooth surface 11 for increasing the friction force between the current probe 1 and the pole.

[0046] The flexible wire 30 is welded to the welding copper sheet 9 and the copper nose 20 .

[0047] Working principle of the present invention:

[0048] The lower spring 2 with an elastic coefficient k=24N / mm is selected. When the probe 100 is pressed down, the tooth surface 11 contacts the pole of the battery cell 40. The angle θ between the current probe 1 and the pole is 87°≤θ≤93°. The probe 100 continues to be compressed from the contact state. Under the spring force of the lower spring 2, the battery cell 40 generates a reaction force F on the probe 100, F=k×x=24x, where: x is the compression amount of the lower spring 2, ranging from 0 to 5mm, the distance from the current probe 1 to the center is L1≈8mm, and the correction torque T1≈F×L1=24x×8=192x.

[0049] The spherical slide 3 and the flat slide 4 are made of Teflon. The friction coefficient between them is μ = 0.04, and the distance from the contact surface to the spherical slide 3 is L2 = 30 mm. Under the elastic force of the lower spring 2, the friction force f = μ × k × x. Since one spherical slide 3 and one flat slide 4 are used, the same friction force is generated at two locations. The torque generated by the friction is Tf ≈ 2 × f × L2 = 2 × 0.04 × 24x × 30 = 57.6x, where T1 > Tf, meaning the correction torque is greater than the torque generated by the friction. This indicates that if the probe 100 is tilted during compression, it can rotate back to a vertical position from the tilted state.

[0050] After returning to the center, the probe 100 will not continue to rotate and tilt, because the force F has been evenly distributed on the tooth surface 11, and the correction torque itself cancels each other out to 0, and the spherical slide 3 and the plane slide 4 will not slide relative to each other, that is, there is no torque generated by friction.

[0051] In summary, the advantages of the present invention are:

[0052] By arranging a spherical slide, a flat slide and a plastic seat on the current probe from bottom to top, and a layer of Teflon tape on the bottom of the plastic seat to reduce the friction coefficient, the lateral force generated when the probe is pressed against the battery cell's pole will push the probe in the other direction through the spherical slide and the flat slide, so that the probe remains perpendicular to the pole surface, thereby increasing the contact area between the probe and the pole and reducing the contact internal resistance, thereby greatly ensuring the performance and safety of charge and discharge tests.

[0053] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An angle adaptive adjustment probe, characterized by: include: a current probe having at least one threaded section on its upper portion; a lower spring, sleeved on the current probe and located at the lower part of the current probe; a spherical slide plate, sleeved on the current probe, located above the lower spring, and abutting against the lower spring; A flat slide plate is sleeved on the current probe and is located above the spherical slide plate; a plastic seat, sleeved on the current probe and located above the planar slide; a layer of Teflon tape, disposed on the bottom surface of the plastic seat; an upper spring, sleeved on the current probe and located above the plastic seat; a lower hexagonal nut, locked on the current probe through the threaded section, located above the upper spring, and causing the upper spring to be in a compressed state; a piece of welded copper sheet, sleeved on the current probe and located above the lower hexagonal nut; an upper hexagonal nut, locked on the current probe through the threaded section and located above the welding copper sheet; a copper nose; a flexible wire, one end of which is connected to the soldered copper sheet, and the other end of which is connected to the copper nose; The bottom surface of the current probe is provided with a tooth surface; The flexible wire is welded to the welding copper sheet and the copper nose.

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