Novel probe with replaceable probe head

Abstract

The utility model relates to the technical field of battery detection, and particularly discloses a novel probe with a detachable probe head, which comprises a current probe rod, a current probe head and a voltage probe, the voltage probe penetrates through the current probe head and the current probe rod, a mounting cavity is arranged in the current probe head, and the head of the current probe rod is inserted into the mounting cavity and is detachably fixed with the current probe head. A first inclined surface in contact with the side wall of the current needle head mounting cavity is formed on the outer ring of the head of the current needle rod, and / or a second inclined surface in contact with the head of the current needle rod is formed on the side wall of the current needle head mounting cavity, and the inclination of the first inclined surface and / or the second inclined surface is 0-90 degrees; according to the utility model, under the condition that the current probe head and the current probe rod can be detached, the contact force between the current probe head and the current probe rod can be ensured, the contact resistance between the current probe head and the current probe rod is ensured, and compared with a probe structure in the prior art, the probe structure has the advantages of better use effect and higher use value.

Description

Technical Field

[0001] The utility model relates to the technical field of battery detection, in particular to a novel probe with a detachable needle head. Background Art

[0002] In order to convert the active substances in the lithium battery into electrochemically active substances through the first charging, and to form an effective passivation film or SEI film on the electrode to ensure the electrochemical performance of the battery cell, it is necessary to form the lithium battery.

[0003] When forming the lithium battery, for the convenience of connection, a current probe is usually used to connect with the corresponding electrode of the lithium battery to test the current, voltage or temperature change of the lithium battery.

[0004] The current probe is applied in the processes of forming, grading and detecting the battery. As a connecting body between the transmission wire and the battery tab, it achieves the purpose of low-resistance current transmission by piercing the oxide layer on the surface of the battery tab.

[0005] In the prior art, whether the current needle of the probe is split or integral, the current needle head and the current needle rod of the current needle are inseparable. During normal use of the probe, the tooth tips on the current needle head will wear out, resulting in an increase in contact resistance. In this situation, the probe cannot be used continuously and needs to be replaced, which consumes a lot of time for the staff and increases the production cost of the enterprise. A probe with a detachable needle head applied by our company can effectively solve the above problem. However, this probe cannot ensure good contact between the current needle head and the head of the current needle rod, resulting in poor use effects.

[0006] To solve the above problems, the present application discloses a novel probe with a detachable needle head. Content of the Utility Model

[0007] To overcome the deficiencies of the prior art, the utility model discloses a novel probe with a detachable needle head.

[0008] To achieve the above purpose, the utility model is realized through the following technical solutions: A novel probe with a detachable needle head, including a current needle rod, a current needle head and a voltage needle. The voltage needle passes through the current needle head and the current needle rod. An installation cavity is opened inside the current needle head. The head of the current needle rod is inserted into the installation cavity and is detachably fixed to the current needle head. A first inclined surface in contact with the side wall of the installation cavity of the current needle head is formed on the outer circle of the head of the current needle rod and / or a second inclined surface in contact with the head of the current needle rod is formed on the side wall of the installation cavity of the current needle head. The inclination of the first inclined surface and / or the second inclined surface is 0-90°.

[0009] Further preferably, an insulating component isolated from the current needle rod is sleeved outside the voltage needle.

[0010] Further preferably, the insulating assembly includes an inner spring, a first inner insulating sleeve, a second inner insulating sleeve, a T-shaped upper insulating sleeve and a collar. The first inner insulating sleeve and the second inner insulating sleeve are fixedly sleeved on the voltage needle inside the current needle rod. An inner step for restricting the upward movement of the second inner insulating sleeve is provided inside the current needle rod. The inner spring is sleeved on the corresponding voltage needle between the first inner insulating sleeve and the second inner insulating sleeve inside the current needle rod. The vertical part of the T-shaped upper insulating sleeve is inserted into the current needle rod, and the horizontal part is arranged outside the current needle rod. The upper end of the voltage needle extends out from the inside of the T-shaped upper insulating sleeve. An annular depression is provided above the T-shaped upper insulating sleeve on the voltage needle. The collar is sleeved in the annular depression and abuts against the T-shaped upper insulating sleeve.

[0011] Further preferably, it further includes an "Ω"-shaped snap spring. Two through grooves symmetric about its center line and communicating with the installation cavity are provided on the side wall of the current needle head. Two grooves symmetric about its center line are provided on the side wall of the head of the current needle rod. The head of the current needle rod is embedded in the installation cavity of the current needle head. The two waists of the "Ω"-shaped snap spring correspondingly pass through the two through grooves of the current needle head and are stuck in the two grooves of the head of the current needle rod.

[0012] Further preferably, a step portion matching the current needle head is formed above the head of the current needle rod.

[0013] Further preferably, a conductive elastic sheet for reducing the contact resistance is provided between the step portion and the current needle head and / or between the current needle rod and the installation cavity of the current needle head.

[0014] Further preferably, the conductive elastic sheet has a circular inner ring and a circular outer ring. A square depression groove is provided on the bottom wall of the installation cavity. A square convex block is integrally formed on the current needle rod. The square convex block is embedded in the square depression groove.

[0015] Further preferably, the inclination angle of the first inclined surface and / or the second inclined surface is 3-15°.

[0016] Further preferably, the first inclined surface is formed by a vertical inclined groove provided on the outer circle of the head of the current needle rod.

[0017] Further preferably, the second inclined surface is formed by a circular inclined groove provided on the side wall of the installation cavity of the current needle head.

[0018] The present utility model achieves the following beneficial effects:

[0019] While ensuring that the current needle tip and the current needle rod can be disassembled, the utility model can also ensure the contact force between the current needle tip and the current needle rod, guaranteeing the contact resistance between them. Compared with the probe structure in the prior art, it has better use effects and strong application value.

[0020] As for other features and advantages of the present utility model, they will be described in the subsequent description, and will be partially obvious from the description, or understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings here are incorporated into the description and form a part of this description, showing the embodiments consistent with the disclosure of the present utility model, and are used together with the description to explain the principles of the present disclosure.

[0022] Figure 1 is a schematic diagram of the overall structure disclosed by the present utility model;

[0023] Figure 3 is an exploded schematic diagram of the structure disclosed by the present utility model;

[0024] Figure 2 is a schematic cross-sectional structure diagram of the structure disclosed by the present utility model;

[0025] In the figure: 10, current needle rod; 11, first inclined surface; 12, groove; 13, step portion; 14, inner step; 15, square convex block; 20, current needle tip; 21, installation cavity; 211, second inclined surface; 212, square recessed groove; 22, through groove; 30, voltage needle; 31, annular recess; 40, insulating component; 41, inner spring; 42, first inner insulating sleeve; 43, second inner insulating sleeve; 44, T-shaped upper insulating sleeve; 45, collar; 50, "Ω"-shaped circlip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0027] In the description of the present utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or position relationship are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0028] Embodiment

[0029] In order to detachably set the current needle tip 20 of the probe from the current needle rod 10 and ensure the contact force between the current needle tip 20 and the head of the current needle rod 10, refer to Figures 1 - 3 As shown, the present application discloses a novel probe with a detachable needle tip, including a current needle rod 10, a current needle tip 20, and a voltage needle 30 (the structure of the voltage needle 30 in the present application can have various options, such as the voltage needle structure in a plug-and-play type quick-change head probe previously applied by Dongguan Yingzhibao Electronic Technology Co., Ltd.); the voltage needle 30 is inserted through the current needle tip 20 and the current needle rod 10. An installation cavity 21 is formed inside the current needle tip 20. The head of the current needle rod 10 is inserted into the installation cavity 21 and is detachably fixed to the current needle tip 20. A first inclined surface 11 that contacts the side wall of the installation cavity 21 of the current needle tip 20 is formed on the outer circle of the head of the current needle rod 10 and / or a second inclined surface 211 that contacts the head of the current needle rod 10 is formed on the side wall of the installation cavity 21 of the current needle tip 20. The slopes of the first inclined surface 11 and / or the second inclined surface 211 are both 0-90°. During the specific use process, a first inclined surface 11 can be formed on the outer circle of the head of the current needle rod 10 to directly contact the side wall of the installation cavity 21, or a second inclined surface 211 can be formed on the side wall of the installation cavity 21 to directly contact the outer circle of the head of the current needle rod 10, or a first inclined surface 11 can be formed on the outer circle of the head of the current needle rod 10 and a second inclined surface 211 can be formed on the side wall of the installation cavity 21 to contact each other.

[0030] Based on the above scheme, while ensuring that the current needle tip 20 and the current needle rod 10 can be detached, the contact force between the current needle tip 20 and the current needle rod 10 is ensured, and the contact resistance between them is ensured.

[0031] In this embodiment, an insulating assembly 40 isolated from the current needle rod 10 is sleeved outside the voltage needle 30 of the present application. The insulating assembly 40 includes an inner spring 41, a first inner insulating sleeve 42, a second inner insulating sleeve 43, a T-shaped upper insulating sleeve 44, and a collar 45. The first inner insulating sleeve 42 and the second inner insulating sleeve 43 are fixedly sleeved on the voltage needle 30 inside the current needle rod 10. An inner step 14 for restricting the upward movement of the second inner insulating sleeve 43 is provided inside the current needle rod 10. The inner spring 41 is sleeved on the corresponding voltage needle 30 between the first inner insulating sleeve 42 and the second inner insulating sleeve 43 inside the current needle rod 10. The vertical part of the T-shaped upper insulating sleeve 44 is inserted inside the current needle rod 10, and the horizontal part is arranged outside the current needle rod 10. The upper end of the voltage needle 30 extends out from the inside of the T-shaped upper insulating sleeve 44. An annular depression 31 is provided above the T-shaped upper insulating sleeve 44 on the voltage needle 30. The collar 45 is sleeved in the annular depression 31 and abuts against the T-shaped upper insulating sleeve 44. Through the arrangement of the above insulating assembly 40, among them, the inner spring 41 can provide elastic support for the voltage needle 30, and the first inner insulating sleeve 42, the second inner insulating sleeve 43, and the T-shaped upper insulating sleeve 44 can ensure insulation between the voltage needle 30 and the current needle rod 10. The position of the voltage needle 30 can be restricted through the collar 45.

[0032] In order to disassemble the current needle head 20 and the current needle rod 10, the present application further includes an "Ω"-shaped snap spring 50. Two through slots 22 symmetric about its center line and communicating with the installation cavity 21 are provided on the side wall of the current needle head 20. Two grooves 12 symmetric about its center line are provided on the side wall of the head of the current needle rod 10. The head of the current needle rod 10 is embedded in the installation cavity 21 of the current needle head 20. The two waists of the "Ω"-shaped snap spring 50 correspondingly pass through the two through slots 22 of the current needle head 20 and are stuck in the two grooves 12 of the head of the current needle rod 10. If the contact resistance increases due to wear of the tooth tips on the current needle head 20, the operator only needs to remove the "Ω"-shaped snap spring 50, replace the new current needle head 20, and then fix it through the "Ω"-shaped snap spring 50. The operation is relatively simple and convenient, with strong practicability.

[0033] In addition to the above structure, a step portion 13 matching the current needle head 20 is formed above the head of the current needle rod 10 of the present application. And in order to reduce the contact resistance between the current needle rod 10 and the current needle head 20, a conductive elastic sheet for reducing the contact resistance is provided between the step portion 13 and the current needle head 20 and / or between the current needle rod 10 and the installation cavity 21 of the current needle head 20 (which has been disclosed in a needle patent with detachable needles applied by our company and is not shown in the present utility model). As for the specific structure of the conductive elastic sheet, it has been disclosed in a probe with detachable needles previously applied by our company, and will not be elaborated herein.

[0034] In an implementation option, the conductive elastic sheet in the present application has a circular inner ring and a circular outer ring. A square recessed groove 212 is formed on the bottom wall of the mounting cavity 21. A square convex block 15 is integrally formed on the current needle rod 10. The square convex block 15 is embedded in the square recessed groove 212. When the square convex block 15 is embedded in the square recessed groove 212, the current needle rod 10 and the current needle head 20 can be oriented. In other cases, if the whole body of the current needle rod 10, the mounting cavity 21 of the current needle head 20, and the inner and outer rings of the conductive elastic sheet are all square, there is no need to form a square recessed groove 212 on the bottom wall of the mounting cavity 21, and there is no need to provide a square convex block 15 on the current needle rod 10.

[0035] As a preferred embodiment, the inclination angle of the first inclined surface 11 and / or the second inclined surface 211 in the present application is 3-15°. Specifically, the inclination angle of the first inclined surface 11 and / or the second inclined surface 211 in the present application can preferably be selected as 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°.

[0036] The first inclined surface 11 in the present application is formed by a vertical inclined groove formed on the outer ring of the head of the current needle rod 10, and there are multiple first inclined surfaces 11 formed. In addition to setting the first inclined surface 11 in this way, if there are other ways for those skilled in the art, they can also be adaptively adopted.

[0037] The second inclined surface 211 in the present application is formed by an annular inclined groove formed on the side wall of the mounting cavity 21 of the current needle head 20, and there are multiple first inclined surfaces 11 formed. In addition to setting the second inclined surface 211 in this way, if there are other ways for those skilled in the art, they can also be adaptively adopted.

[0038] In the description of this specification, the description referring to terms such as "an embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0039] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A new type of probe with a detachable needle head, comprising a current needle rod, a current needle head and a voltage needle, wherein the voltage needle is inserted into the current needle head and the current needle rod, an installation cavity is provided inside the current needle head, and the head of the current needle rod is inserted into the installation cavity and detachably fixed to the current needle head, characterized in that: The outer ring of the current needle rod head is formed with a first inclined surface in contact with the side wall of the current needle rod installation cavity and / or the side wall of the current needle rod installation cavity is formed with a second inclined surface in contact with the current needle rod head, and the inclination of the first inclined surface and / or the second inclined surface is 0-90°.

2. A novel probe with a detachable needle according to claim 1, characterized in that: The outer sleeve of the voltage needle is provided with an insulating component isolated from the current needle rod.

3. A new probe with a detachable needle according to claim 2, characterized in that: The insulating assembly includes an inner spring, a first inner insulating sleeve, a second inner insulating sleeve, a T-shaped upper insulating sleeve and a collar. The first inner insulating sleeve and the second inner insulating sleeve are fixedly sleeved on the voltage needle inside the current needle rod. An inner step for limiting the upward movement of the second inner insulating sleeve is provided inside the current needle rod. The inner spring is sleeved on the voltage needle corresponding to the first inner insulating sleeve and the second inner insulating sleeve inside the current needle rod. The vertical portion of the T-shaped upper insulating sleeve is penetrated inside the current needle rod, and the horizontal portion is arranged outside the current needle rod. The upper end of the voltage needle extends from the inside of the T-shaped upper insulating sleeve. The voltage needle is provided with an annular recess above the T-shaped upper insulating sleeve. The collar is sleeved in the annular recess and overlaps with the T-shaped upper insulating sleeve.

4. A novel probe with a detachable needle according to claim 1, characterized in that: It also includes an "Ω"-shaped retaining spring, the side wall of the current needle head is provided with two through grooves which are symmetrical about its center line and communicated with the installation cavity, the side wall of the current needle rod head is provided with two grooves which are symmetrical about its center line, the current needle rod head is embedded in the current needle rod installation cavity, and the two waists of the "Ω"-shaped retaining spring correspond to pass through the two through grooves of the current needle head and are stuck in the two grooves of the current needle rod head.

5. The novel probe with a detachable needle according to claim 1, characterized in that: A step portion matching the current needle head is formed above the current needle rod head.

6. A novel probe with a detachable needle according to claim 5, characterized in that: A conductive spring sheet for reducing contact resistance is arranged between the step portion and the current needle head and / or between the current needle rod and the mounting cavity of the current needle head.

7. A novel probe with a detachable needle according to claim 6, characterized in that: The conductive spring has a circular inner ring and a circular outer ring, a square recessed groove is provided on the bottom wall of the mounting cavity, a square protrusion is integrally formed on the current needle rod, and the square protrusion is embedded in the square recessed groove.

8. The novel probe with a detachable needle according to claim 1, characterized in that: The inclination angle of the first inclined surface and / or the second inclined surface is 3-15°.

9. A novel probe with a detachable needle according to claim 8, characterized in that: The first inclined surface is formed by a vertical inclined groove provided on the outer circle of the current needle rod head.

10. The novel probe with a detachable needle according to claim 8, characterized in that: The second inclined surface is formed by a circular inclined groove provided on the side wall of the current needle installation cavity.

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