Small-sized plug-in probe

Abstract

The utility model relates to the technical field of battery testing, and provides a small-sized plug-in probe. According to the small-sized plug-in probe provided by the utility model, the current rod is adopted, the end face is provided with the slot, the excircle surface of the current rod is provided with at least two grooves, the grooves are communicated with the slot, all the grooves are arranged at intervals along the circumferential direction of the current rod, and the end part of the current rod is constructed into at least two clamping pieces which are arranged at intervals by all the grooves; the current head is inserted into the slot; and the spring is sleeved on all the clamping pieces. According to the small-sized plug-in probe provided by the utility model, high-stability clamping of the current head in a vibration environment is realized through the synergistic effect of the spring and the multiple clamping pieces, the clamping pieces are uniformly folded by continuous radial pressure provided by the spring, the current head is ensured to be stably fixed, and the elastic clamping structure can adaptively compensate micro deformation caused by vibration, so that the current head can be stably fixed. The technical problem that the current head is prone to loosening due to the fact that the clamping effect of the clamping pieces on the current head is weakened in the vibration environment is effectively solved.

Description

A small pluggable probe Technical Field

[0001] This utility model relates to the field of battery testing technology, and in particular to a small pluggable probe. Background Technology

[0002] Lithium-ion batteries have become the mainstream technology in the field of chemical energy storage due to their high energy density, lack of memory effect, long cycle life, and environmental friendliness. In the battery production and quality control process, it is necessary to test their electrical parameters with high current to ensure product qualification rate and reliability. During the test, the probe needs to be replaced continuously. For example, Chinese patent document with announcement number CN109932535 ​​discloses a current probe structure in which the insertion head of the probe assembly is divided into four clamping pieces by four grooves. Each clamping piece has a groove, and the buckle fastens these grooves to ensure the stability of the clamping pieces and the fixation of the second probe.

[0003] In the aforementioned related technologies, during actual operation, when the probe is in a vibrating environment, the clamping effect of multiple clamping plates on the second probe is weakened, causing the second probe to easily loosen.

[0004] Therefore, there is an urgent need to invent a probe. Summary of the Invention

[0005] The purpose of this invention is to provide a small pluggable probe, which aims to solve the technical problem that the probe is prone to loosening due to the weakened clamping effect of the clamping plate in the existing vibration environment.

[0006] This application provides a small pluggable probe, including: a current rod with a slot on its end face, and at least two grooves on the outer circular surface of the current rod, the grooves communicating with the slot, all the grooves being arranged at intervals along the circumference of the current rod, and all the grooves forming at least two spaced clamping pieces at the end of the current rod.

[0007] The current probe is inserted into the slot;

[0008] Springs are fitted onto all the clamping plates.

[0009] Optionally, the outer circular surface of the clamping piece is provided with a first protrusion and a second protrusion, and the first protrusion and the second protrusion are arranged at intervals along the axial direction of the current rod.

[0010] Optionally, the first protrusion is disposed around the clamping piece in the circumferential direction, and the two ends of the first protrusion extend to the two edges of the clamping piece respectively.

[0011] Optionally, the second protrusion is disposed around the clamping piece in the circumferential direction, and the two ends of the second protrusion extend to the two edges of the clamping piece respectively.

[0012] Optionally, the second protrusion is provided with rounded corners or chamfers.

[0013] Optionally, the bottom wall of the groove is flush with the bottom wall of the slot.

[0014] Optionally, the end of the current probe located in the slot has a rounded or chamfered corner.

[0015] Optionally, the current probe is located at one end inside the slot and is interference-fitted with the slot.

[0016] Optionally, the difference between the outer diameter of the second protrusion and the inner diameter of the spring is 0 to 0.05 mm.

[0017] Optionally, a recess is provided on the lower part of the outer surface of the current head away from the slot insertion end.

[0018] The beneficial effects of this utility model's small pluggable probe are as follows: During assembly, the current head is inserted into the slot, and then springs are placed on the outside of all the clamping plates, thereby achieving the purpose of clamping the current head with all the clamping plates. The use of springs to clamp the current head with all the clamping plates while providing continuous elastic pressure, adapting to slight deformation of the clamping plates, and resisting vibration, solves the technical problem of weakened clamping effect of the clamping plates on the current head under vibration, leading to easy loosening of the current head. This improves the probe's ability to adapt to the deformation of the clamping plates when working in a vibration environment, facilitating the stable clamping of the current head by the clamping plates. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 is an assembly diagram of a small pluggable probe provided in an embodiment of the present invention;

[0021] Figure 2 is an exploded view of a small pluggable probe provided in an embodiment of the present invention;

[0022] Figure 3 is a cross-sectional view of the current rod provided in an embodiment of this utility model;

[0023] Figure 4 is a schematic diagram of the current head provided in an embodiment of this utility model.

[0024] The following are the labeling elements in the figure:

[0025] 1. Current rod; 11. Slot; 12. Groove;

[0026] 13. Clamping piece; 131. First protrusion; 132. Second protrusion;

[0027] 2. Current probe; 21. Recess; 3. Spring. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0029] Throughout this specification, references to "one embodiment" or "embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in another embodiment of this application," "in one embodiment," or "in some embodiments" appear in various places throughout the specification, and not all refer to the same embodiment. Furthermore, in one or more embodiments, particular features, structures, or characteristics may be combined in any suitable manner.

[0030] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Please refer to Figures 1 to 4 for the following description of the small pluggable probe structure in the embodiments of this utility model.

[0034] Please refer to Figure 1. This application provides a small pluggable probe, including a current rod 1, a slot 11 on the end face, and at least two grooves 12 on the outer circular surface of the current rod 1. The grooves 12 communicate with the slot 11. All the grooves 12 are arranged at intervals along the circumference of the current rod 1. All the grooves 12 construct the end of the current rod 1 as at least two spaced clamping pieces 13.

[0035] The current head 2 is inserted into the slot 11;

[0036] Spring 3 is sleeved on all the clamping plates 13.

[0037] Specifically, the coordinated action of spring 3 and clamping plates 13 achieves high-stability clamping of the probe under vibration. The continuous radial pressure provided by spring 3 causes multiple clamping plates 13 to uniformly converge, ensuring the current head 2 is firmly fixed. The groove 12 allows the elastic clamping structure to adaptively compensate for minor deformations caused by vibration. The design of the clamping plates 13 disperses contact stress, preventing single-point failure. This structure effectively solves the technical problem of probe loosening caused by weakened clamping effect in vibration environments. It has outstanding advantages such as compact structure, reliable clamping, and long service life, significantly improving the reliability of battery testing and the accuracy of test data.

[0038] In another embodiment of this application, please refer to FIG1. ​​The outer circular surface of the clamping piece 13 is provided with a first protrusion 131 and a second protrusion 132. The first protrusion 131 and the second protrusion 132 are arranged at intervals along the axial direction of the current rod 1. In order to stably fit the spring 3 on all the clamping pieces 13, the first protrusion 131 and the second protrusion 132 are provided on the outer circular surface of the clamping piece 13. The first protrusion 131 and the second protrusion 132, which are distributed axially, form a double locking point, restricting the axial movement of the spring 3 and fixing the position of the spring 3, so that the current rod 1 can continuously and stably clamp the current head 2.

[0039] In another embodiment of this application, please refer to FIG1. ​​The first protrusion 131 is arranged around the clamping piece 13 in the circumferential direction. The two ends of the first protrusion 131 extend to the two edges of the clamping piece 13 respectively. This arrangement can limit the spring 3 from sliding from the lower end of the current rod 1 to a greater extent.

[0040] In another embodiment of this application, referring to FIG1, the second protrusion 132 is disposed around the clamping piece 13 circumferentially, and the two ends of the second protrusion 132 extend to the two edges of the clamping piece 13, respectively. This can further restrict the spring 3 from sliding from the upper end of the current rod 1.

[0041] In another embodiment of this application, please refer to FIG1. ​​The second protrusion 132 is provided with a rounded corner or chamfer. The rounded corner or chamfer guides the spring 3 to slide into the installation, reducing installation resistance and improving assembly efficiency.

[0042] In another embodiment of this application, please refer to FIG3. The bottom wall of the groove 12 is flush with the bottom wall of the slot 11. On the one hand, this ensures that the deformation force of the clamping piece 13 acts directly on the current head 2, reducing energy loss. On the other hand, it helps to increase the depth of the groove 12, making it easier for the current head to be inserted into the slot 11, which helps to improve assembly efficiency.

[0043] In another embodiment of this application, please refer to FIG2. The end of the current head 2 located in the slot 11 is provided with a rounded corner or chamfer. The rounded corner or chamfer prevents the end of the current head 2 from scratching the inner wall of the slot 11 when it is inserted or removed. At the same time, it helps the current head 2 to automatically correct its position when it is inserted into the slot 11, which is beneficial to extend the life of the current head 2 and the slot 11 and reduce the maintenance frequency.

[0044] In another embodiment of this application, please refer to FIG1. ​​The end of the current head 2 located in the slot 11 is interference-fitted with the slot 11. The interference fit provides additional frictional resistance to prevent the clamping piece 13 from loosening due to slight movement. In a vibration environment, the tight contact reduces the contact resistance, which is suitable for high current transmission and improves the test accuracy.

[0045] In another embodiment of this application, please refer to FIG1. ​​The difference between the outer diameter of the second protrusion 132 and the inner diameter of the spring 3 is 0 to 0.05 mm. The extremely small tolerance ensures that the spring 3 and the second protrusion 132 have no gap contact, avoiding relative sliding under vibration. In addition, within the above-mentioned difference, it can be ensured that the spring 3 can pass over the second protrusion 132 and be sleeved between the first protrusion 131 and the second protrusion 132.

[0046] In another embodiment of this application, please refer to FIG4. A recess 21 is provided on the lower part of the outer surface of the current head 2 away from the insertion end of the slot 11. There are two recesses 21. The shape of the recess 21 can match the special replacement tool. When replacing the current head 2, it provides a clear clamping position for the special replacement tool and avoids the tool from slipping or damaging the surface of the current head 2.

[0047] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A small pluggable probe, characterized in that, include: A current rod (1) has a slot (11) on its end face. At least two grooves (12) are formed on the outer circular surface of the current rod (1). The grooves (12) are connected to the slot (11). All the grooves (12) are arranged at intervals along the circumference of the current rod (1). All the grooves (12) form at least two spaced clamping pieces (13) at the end of the current rod (1). A current head (2) is inserted into the slot (11). A spring (3) is sleeved on all the clamping pieces (13).

2. The miniature pluggable probe according to claim 1, characterized in that: The outer circular surface of the clamping piece (13) is provided with a first protrusion (131) and a second protrusion (132), and the first protrusion (131) and the second protrusion (132) are arranged at intervals along the axial direction of the current rod (1).

3. A small pluggable probe according to claim 2, characterized in that: The first protrusion (131) is arranged around the clamping piece (13) in the circumferential direction, and the two ends of the first protrusion (131) extend to the two edges of the clamping piece (13).

4. A small pluggable probe according to claim 2, characterized in that: The second protrusion (132) is arranged around the clamping piece (13) in the circumferential direction, and the two ends of the second protrusion (131) extend to the two edges of the clamping piece (13).

5. A small pluggable probe according to claim 2, characterized in that: The second protrusion (132) is provided with rounded corners or chamfers.

6. A small pluggable probe according to claim 1, characterized in that: The bottom wall of the groove (12) is flush with the bottom wall of the slot (11).

7. A small pluggable probe according to claim 1, characterized in that: The end of the current head (2) located in the slot (11) is provided with a rounded corner or chamfer.

8. A small pluggable probe according to claim 1, characterized in that: The end of the current head (2) located inside the slot (11) is interference-fitted with the slot (11).

9. A small pluggable probe according to claim 2, characterized in that: The difference between the outer diameter of the second protrusion (132) and the inner diameter of the spring (3) is 0 to 0.05 mm.

10. A small pluggable probe according to claim 1, characterized in that: The lower part of the outer surface of the current head (2) away from the insertion end of the slot (11) is provided with a recess (21).

Images