Large-current knife switch type probe

Abstract

A large-current knife switch type probe comprises a probe main body (1), a probe fixing assembly (2), a probe compression assembly (3) and a probe insulation assembly (4). Wherein the probe main body (1) comprises a voltage probe (11) and a current probe (12); the probe fixing assembly (2) comprises a current probe fixing device (21); the probe compression assembly (3) comprises a current compression spring (31) and a voltage compression spring (32); the probe insulation assembly (4) comprises an upper insulation sleeve (41), a lower insulation sleeve (42) and a knife type insulation sleeve (43). Through the probe fixing assembly (2), fixation and external connection of the probe main body (1) are ensured. The current probe (12) is internally provided with a through groove, the switch-blade-shaped voltage probe (11) is arranged in the through groove in a penetrating mode, normal movement of the probe is guaranteed through the probe compression assembly (3), and conduction of the probe compression assembly (3) and metal powder generated by normal movement is avoided through the probe insulation assembly (4).

Description

Technical Field

[0001] The invention belongs to the field of probe manufacturing, and in particular relates to a large current knife-type probe. Background Art

[0002] In the manufacturing process of charging and discharging equipment in the field of lithium battery equipment manufacturing, the probe, as a component that directly contacts the battery, directly affects the charging and discharging effect. In the process of the probe contacting the battery, the traditional point-contact probe has insufficient contact with the battery electrode due to the uneven flatness of the battery surface itself, tray process errors and wear caused by long time. At the same time, the voltage needle and the current needle are prone to short circuit due to the metal powder conductive generated by long-term friction. Summary of the invention

[0003] The present invention proposes a high current knife-type probe in response to the above problems. The design concept is to set the voltage needle into a knife shape to increase its contact area with the battery pole, and at the same time add a probe insulation component between the current needle and the voltage needle to eliminate the problem of short circuit between the voltage needle and the current needle.

[0004] A high current knife-type probe comprises a vertical probe body 1, a probe insulating component 4 is arranged inside the probe body 1, a probe compression component 3 is sleeved outside the probe body 1, a probe fixing component 2 is connected to the top of the probe body 1, and the probe fixing component 2 is connected to an external mechanism;

[0005] The probe body 1 comprises a vertical current needle 12, which is a hollow cylindrical structure; a vertical cylindrical through groove is provided inside the current needle 12, a downwardly open knife-shaped cavity is provided at the bottom of the current needle 12, and an annular boss 121 is provided on the periphery of the knife-shaped cavity; the knife-shaped cavity and the through groove are in communication;

[0006] A vertical cylindrical voltage needle 11 is inserted into the through slot of the current needle 12; the bottom of the voltage needle 11 is a knife-shaped structure 111 perpendicular to the horizontal plane, and the knife-shaped structure 111 is accommodated in the knife-shaped cavity of the voltage needle 12; the bottom end of the knife-shaped structure 111 is lower than the bottom end of the current needle 12;

[0007] The upper half of the current needle 12 is sleeved with a current needle fixing device 21 belonging to the probe fixing assembly 2, and the top of the current needle fixing device 21 is connected to the second fixing sleeve 23 through a lower fixing nut 22; a protruding structure is provided on one side of the second fixing sleeve 23, and the top of the protruding structure is connected to the first fixing sleeve 27 through a braided wire 28, and the first fixing sleeve 27 is connected to an external mechanism; the top of the second fixing sleeve 23 is connected to the upper fixing nut 26 through a corrugated gasket 24, and the upper fixing nut 26 is connected to the top of the current needle 12 through a thread;

[0008] The lower half of the current needle 12 is sleeved with a current compression spring 32; the top end of the current compression spring 32 is connected to the current needle fixing device 21, and the bottom end of the current compression spring 32 is connected to the annular boss 121;

[0009] The top of the voltage needle 11 is higher than the top of the current needle 12; the top of the voltage needle 11 is connected to a voltage needle fixing device 25;

[0010] The voltage needle 11 is sleeved with a probe insulating component 4 ; the probe insulating component 4 separates the voltage needle 11 and the current needle 12 , so that the voltage needle 11 and the current needle 12 are insulated.

[0011] More specifically, the probe insulating assembly 4 can be divided into an upper insulating sleeve 41, a lower insulating sleeve 42 and a guillotine-shaped insulating sleeve 43 from top to bottom; the guillotine-shaped insulating sleeve 43 is sleeved on the outside of the guillotine-shaped structure 111; the inner diameter of the lower insulating sleeve 42 is larger than the outer diameter of the interface between the upper insulating sleeve 41 and the guillotine-shaped insulating sleeve 43 and the lower insulating sleeve 42;

[0012] A voltage compression spring 31 sleeved on the voltage needle 11 is arranged in the lower insulating sleeve 42 ; the top of the voltage compression spring 31 contacts the upper insulating sleeve 41 , and the bottom of the voltage compression spring 31 contacts the lower insulating sleeve 42 .

[0013] More specifically, the elastic coefficient of the voltage compression spring 32 is smaller than the elastic coefficient of the current compression spring 31 .

[0014] More specifically, the horizontal distance between the voltage compression spring 32 and the voltage needle 11 is less than 0.5 mm, and the horizontal distance between the voltage compression spring 32 and the lower insulating sleeve 42 is less than 0.5 mm.

[0015] More specifically, the voltage pin fixing device 25 is provided with a plurality of threaded holes, and the voltage pin 11 and the voltage pin fixing device 25 are connected by inserting fixing pins 29 into the threaded holes.

[0016] More specifically, the bottoms of the voltage needle 11 and the current needle 12 are provided with uniformly distributed saw teeth.

[0017] The technical effect of the present invention is that the contact area between the knife-shaped voltage needle 11 and the battery is larger than that of the traditional point-contact voltage probe, with strong conductivity and low wear rate; the setting of the probe insulation component 4 avoids conduction between the current needle 12 and the voltage needle 11. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of a high current knife-type probe of the present invention.

[0019] Figure 2 It is a side view of a high current knife-type probe of the present invention.

[0020] Figure 3It is a longitudinal section view of a high current knife-type probe of the present invention.

[0021] Figure 4 It is a structural diagram of the probe fixing assembly of the present invention.

[0022] Figure 5 is an exploded view of the probe fixing assembly of the present invention.

[0023] Figure 6 1 is a structural diagram of the probe insulation assembly of the present invention.

[0024] Figure 7 It is a structural diagram of the probe compression assembly of the present invention.

[0025] Figure 8 This is a diagram showing the internal structure of a high-current knife-type probe with hidden voltage needle and current needle of the present invention. DETAILED DESCRIPTION

[0026] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0027] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0032] The present invention will be described in detail below in conjunction with exemplary embodiments with reference to the accompanying drawings.

[0033] A high current knife-type probe comprises a vertical probe body 1, a probe insulating component 4 is arranged inside the probe body 1, a probe compression component 3 is sleeved outside the probe body 1, a probe fixing component 2 is connected to the top of the probe body 1, and the probe fixing component 2 is connected to an external mechanism;

[0034] The probe body 1 comprises a vertical current needle 12, which is a hollow cylindrical structure; a vertical cylindrical through groove is provided inside the current needle 12, a downwardly open knife-shaped cavity is provided at the bottom of the current needle 12, and an annular boss 121 is provided on the periphery of the knife-shaped cavity; the knife-shaped cavity and the through groove are in communication;

[0035] A vertical cylindrical voltage needle 11 is inserted into the through slot of the current needle 12; the bottom of the voltage needle 11 is a knife-shaped structure 111 perpendicular to the horizontal plane, and the knife-shaped structure 111 is accommodated in the knife-shaped cavity of the voltage needle 12; the bottom end of the knife-shaped structure 111 is lower than the bottom end of the current needle 12;

[0036] The upper half of the current needle 12 is sleeved with a current needle fixing device 21 belonging to the probe fixing assembly 2, and the top of the current needle fixing device 21 is connected to the second fixing sleeve 23 through a lower fixing nut 22; a protruding structure is provided on one side of the second fixing sleeve 23, and the top of the protruding structure is connected to the first fixing sleeve 27 through a braided wire 28, and the first fixing sleeve 27 is connected to an external mechanism; the top of the second fixing sleeve 23 is connected to the upper fixing nut 26 through a corrugated gasket 24, and the upper fixing nut 26 is connected to the top of the current needle 12 through a thread;

[0037] The lower half of the current needle 12 is sleeved with a current compression spring 32; the top end of the current compression spring 32 is connected to the current needle fixing device 21, and the bottom end of the current compression spring 32 is connected to the annular boss 121;

[0038] The top of the voltage needle 11 is higher than the top of the current needle 12; the top of the voltage needle 11 is connected to a voltage needle fixing device 25;

[0039] The voltage needle 11 is sleeved with a probe insulating component 4 ; the probe insulating component 4 separates the voltage needle 11 and the current needle 12 , so that the voltage needle 11 and the current needle 12 are insulated.

[0040] In some embodiments, the probe insulating assembly 4 can be divided into an upper insulating sleeve 41, a lower insulating sleeve 42 and a guillotine-shaped insulating sleeve 43 from top to bottom; the guillotine-shaped insulating sleeve 43 is sleeved on the outside of the guillotine-shaped structure 111; the inner diameter of the lower insulating sleeve 42 is larger than the outer diameter of the interface between the upper insulating sleeve 41 and the guillotine-shaped insulating sleeve 43 and the lower insulating sleeve 42;

[0041] A voltage compression spring 31 sleeved on the voltage needle 11 is arranged in the lower insulating sleeve 42 ; the top of the voltage compression spring 31 contacts the upper insulating sleeve 41 , and the bottom of the voltage compression spring 31 contacts the lower insulating sleeve 42 .

[0042] In some embodiments, the elastic coefficient of the voltage compression spring 32 is smaller than the elastic coefficient of the current compression spring 31 .

[0043] In some embodiments, the horizontal distance between the voltage compression spring 32 and the voltage needle 11 is less than 0.5 mm, and the horizontal distance between the voltage compression spring 32 and the lower insulating sleeve 42 is less than 0.5 mm.

[0044] In some embodiments, the voltage needle fixing device 25 is provided with a plurality of threaded holes, and the voltage needle 11 and the voltage needle fixing device 25 are connected by installing fixing pins 29 in the threaded holes.

[0045] In some embodiments, the bottoms of the voltage needle 11 and the current needle 12 are provided with uniformly distributed saw teeth.

[0046] The technical effect of the present invention is that the contact area between the knife-shaped voltage needle and the battery is larger than that of the traditional point-contact voltage probe, the conductivity is strong, and the wear rate is low; the setting of the probe insulation component avoids conduction between the current needle and the voltage needle.

[0047] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A high current knife probe, characterized in that: The probe body (1) comprises a vertical probe body (1), a probe insulating component (4) is arranged inside the probe body (1), a probe compression component (3) is sleeved outside the probe body (1), a probe fixing component (2) is connected to the top of the probe body (1), and the probe fixing component (2) is connected to an external mechanism; The probe body (1) comprises a vertical current needle (12), which is a hollow cylindrical structure; a vertical cylindrical through groove is provided inside the current needle (12); a downwardly open knife-shaped cavity is provided at the bottom of the current needle (12); an annular boss (121) is provided on the periphery of the knife-shaped cavity; the knife-shaped cavity and the through groove are in communication; A vertical cylindrical voltage needle (11) is inserted into the through slot of the current needle (12); the bottom of the voltage needle (11) is a knife-shaped structure (111) perpendicular to the horizontal plane, and the knife-shaped structure (111) is accommodated in the knife-shaped cavity of the voltage needle (12); the bottom end of the knife-shaped structure (111) is lower than the bottom end of the current needle (12); The upper half of the current needle (12) is sleeved with a current needle fixing device (21) belonging to the probe fixing assembly (2), and the top of the current needle fixing device (21) is connected to the second fixing sleeve (23) via a lower fixing nut (22); a protruding structure is provided on one side of the second fixing sleeve (23), and the top of the protruding structure is connected to the first fixing sleeve (27) via a braided wire (28), and the first fixing sleeve (27) is connected to an external mechanism; the top of the second fixing sleeve (23) is connected to the upper fixing nut (26) via a corrugated gasket (24), and the upper fixing nut (26) is connected to the top of the current needle (12) via a thread; The lower half of the current needle (12) is sleeved with a current compression spring (32); the top end of the current compression spring (32) is connected to the current needle fixing device (21), and the bottom end of the current compression spring (32) is connected to the annular boss (121); The top of the voltage needle (11) is higher than the top of the current needle (12); the top of the voltage needle (11) is connected to a voltage needle fixing device (25); A probe insulating component (4) is sleeved on the voltage needle (11); the probe insulating component (4) separates the voltage needle (11) and the current needle (12) to insulate the voltage needle (11) and the current needle (12).

2. A high current knife-type probe according to claim 1, characterized in that: The probe insulating assembly (4) can be divided into an upper insulating sleeve (41), a lower insulating sleeve (42) and a knife-shaped insulating sleeve (43) from top to bottom; the knife-shaped insulating sleeve (43) is sleeved on the outside of the knife-shaped structure (111); the inner diameter of the lower insulating sleeve (42) is larger than the outer diameter of the interface between the upper insulating sleeve (41) and the knife-shaped insulating sleeve (43) and the lower insulating sleeve (42); A voltage compression spring (31) sleeved on the voltage needle (11) is arranged in the lower insulating sleeve (42); the top of the voltage compression spring (31) contacts the upper insulating sleeve (41), and the bottom of the voltage compression spring (31) contacts the lower insulating sleeve (42).

3. A high current knife-type probe according to claim 2, characterized in that: The elastic coefficient of the voltage compression spring (32) is smaller than the elastic coefficient of the current compression spring (31).

4. A high current knife-type probe according to claim 2, characterized in that: The horizontal spacing between the voltage compression spring (32) and the voltage needle (11) is less than 0.5 mm, and the horizontal spacing between the voltage compression spring (32) and the lower insulating sleeve (42) is less than 0.5 mm.

5. A high current knife probe according to claim 1, characterized in that: A plurality of threaded holes are provided on the voltage needle fixing device (25), and the voltage needle 11 and the voltage needle fixing device 25 are connected by inserting fixing pins (29) into the threaded holes.

6. A high current knife probe according to claim 1, characterized in that: The bottoms of the voltage needle (11) and the current needle (12) are provided with saw teeth evenly distributed.

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