Monopole piece detection device

Abstract

The utility model provides a monopole piece detection device which comprises a piston rod and an upper shell assembly. The piston rod is movably arranged on the upper shell assembly in the vertical direction. One end of the piston rod is used for abutting against a to-be-tested pole piece, and the other end is provided with a sealing part. An oil seal groove matched with the sealing part is formed in the upper end part of the upper shell assembly; the oil seal groove is filled with oil liquid; when the piston rod moves, oil liquid is always in contact with the sealing part; a sealing part is arranged at the other end of the piston rod; an oil seal groove matched with the sealing part is formed in the upper end part of the upper shell assembly; the oil seal groove is filled with oil liquid; when the piston rod moves, oil liquid is always in contact with the sealing part, so that the piston rod and the upper shell assembly form movable sealing, and the problem of poor sealing performance caused by abrasion of a sealing ring does not exist; and meanwhile, the problem that the displacement precision has a large error due to friction of the sealing ring is also avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery detection, in particular to a single-pole piece detection device. Background Art

[0002] The pole piece of button cell will change in volume (may become thinner or thicker) during the process of charging and discharging, which has a significant impact on the electrical performance and installation performance of the entire battery. Therefore, when designing or producing products, the thickness change of the pole piece during charging and discharging will be measured.

[0003] The existing electrode sheet detection device usually stacks the positive electrode sheet, diaphragm and negative electrode sheet and puts them into a buckle fixture, drips electrolyte to simulate a battery, and then powers on for detection; by measuring the displacement distance of the piston rod, the volume change of the electrode sheet during the charging and discharging process is detected; however, the existing electrode sheet detection device, such as the patent with application number 202310074735.8, provides a single-electrode sheet detection fixture, on which a sealing ring is provided on the piston rod to flexibly fit the perforated side wall of the upper fixture to achieve a movable sealing fit between the piston rod and the upper fixture. However, after long-term detection and use, the repeated movement of the piston rod will cause wear of the sealing ring, resulting in poor sealing; at the same time, the sealing ring also increases the friction between the piston rod and the side wall, and the failure to ensure the lubrication of the sealing ring will cause a large error in the displacement accuracy. Utility Model Content

[0004] In view of this, an object of the present invention is to provide a single-pole piece detection device to solve the above-mentioned problem.

[0005] The utility model adopts the following scheme:

[0006] The present application provides a single-pole piece detection device, comprising a piston rod and an upper shell assembly; the piston rod is movably arranged on the upper shell assembly along the vertical direction; one end of the piston rod is used to abut against the pole piece to be tested, and the other end is provided with a sealing portion; the upper end portion of the upper shell assembly is provided with an oil seal groove adapted to the sealing portion; the oil seal groove is filled with oil; when the piston rod moves, the oil is always in contact with the sealing portion.

[0007] Furthermore, the oil is an inert oil.

[0008] Furthermore, the sealing portion is an annular clamping wall that protrudes downward in a whole circle to form at least one circle; the oil seal groove and the sealing portion are adapted to form a groove body that is recessed downward in a whole circle.

[0009] Furthermore, it also includes a lower shell assembly, which includes a lower shell and a lower conductive rod connected to the lower shell; the lower shell is provided with a working cavity with an upper opening for placing a reaction electrode, a hard diaphragm and an electrode to be tested.

[0010] Furthermore, an elastic member is included; the upper shell assembly includes an upper shell arranged on the lower shell, a rotary cover for connecting the upper shell and the lower shell, a cover plate connected to the upper shell, and an upper conductive rod connected to the cover plate; the piston rod is movably inserted through the upper shell and the cover plate, and an action portion is provided at one end thereof, and is placed in the working chamber for abutting against the test electrode; the elastic member is arranged between the action portion and the upper shell; the oil seal groove is arranged on the upper end surface of the cover plate.

[0011] Furthermore, the hard diaphragm is a ceramic diaphragm for electrolysis.

[0012] Furthermore, a positioning plate is also included, which is arranged at the bottom of the lower shell and protrudes outward.

[0013] Furthermore, a plurality of sealing rings are arranged between the lower end surface of the upper shell and the upper end surface of the lower shell to form a sealed connection.

[0014] By adopting the above technical solution, the utility model can achieve the following technical effects:

[0015] The utility model provides a single-pole piece detection device, which is provided with a sealing part on the other end of a piston rod; an oil seal groove adapted to the sealing part is provided on the upper end of an upper shell component; the oil seal groove is filled with oil; so that when the piston rod moves, the oil is always in contact with the sealing part, so that a movable seal is formed between the piston rod and the upper shell component, and there is no problem of poor sealing due to wear of the sealing ring; at the same time, the problem of large error in displacement accuracy due to friction of the sealing ring is also avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the bottom structure of a single-pole piece detection device according to an embodiment of the utility model;

[0018] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of AA;

[0019] Icons: piston rod 1, lower shell 2, lower conductive rod 3, upper shell 4, screw cover 5, elastic member 6, upper conductive rod 7, cover plate 8, oil seal groove 9, sealing part 10, action part 11, sealing ring 12, positioning plate 13. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] Example

[0022] Combination Figure 1 and Figure 2 As shown, this embodiment provides a single-pole piece detection device, including a piston rod 1 and an upper shell assembly; the piston rod 1 is movably arranged on the upper shell assembly along the vertical direction; one end of the piston rod 1 is used to abut the pole piece to be tested, and the other end is provided with a sealing portion 10; the upper end of the upper shell assembly is provided with an oil seal groove 9 adapted to the sealing portion 10; the oil seal groove 9 is filled with oil; when the piston rod 1 moves, the oil is always in contact with the sealing portion 10.

[0023] Specifically, in this embodiment, it includes a lower shell assembly, an elastic member 6 and an upper shell assembly; the lower shell assembly includes a lower shell 2 and a lower conductive rod 3 connected to the lower shell 2; the lower shell 2 is provided with a working chamber with an upper opening for placing a reaction electrode, a hard diaphragm and a electrode to be tested. The upper shell 4 assembly includes an upper shell 4 provided on the lower shell 2, a rotary cover 5 for connecting the upper shell 4 and the lower shell 2, a cover plate 8 connected to the upper shell 4 and an upper conductive rod 7 connected to the cover plate 8; the piston rod 1 is movably arranged on the upper shell 4 and the cover plate 8, and one end of the piston rod 1 is provided with an action portion 11, which is placed in the working chamber for contacting the electrode to be tested; the elastic member 6 is arranged between the action portion 11 and the upper shell 4; the oil seal groove 9 is arranged on the upper end surface of the cover plate 8. The oil is an inert oil. A plurality of sealing rings 12 are arranged between the lower end surface of the upper shell 4 and the upper end surface of the lower shell 2 to form a sealed connection. The bottom of the lower housing 2 is also provided with a positioning plate 13, which is protruding outward to facilitate positioning and fixing the entire detection device on the platform.

[0024] In this embodiment, the sealing part 10 is an annular clamping wall that protrudes downward to form at least one circle; the oil seal groove 9 and the sealing part 10 are adapted to form a groove body that is recessed downward to form a circle; the hard diaphragm is a ceramic diaphragm for electrolysis. A passage is formed through the action part 11, the piston rod 1, the cover plate 8 and the upper conductive rod 7; a passage is formed through the lower shell 2 and the lower conductive rod 3; the upper conductive rod 7 and the lower conductive rod 3 are then connected to an external charging and discharging device to start detection.

[0025] The utility model provides a single-pole piece detection device, which is provided with a sealing portion 10 on the other end of a piston rod 1; an oil seal groove 9 adapted to the sealing portion 10 is provided at the upper end of an upper shell component; the oil seal groove 9 is filled with oil; so that when the piston rod 1 moves, the oil is always in contact with the sealing portion 10, so that the piston rod 1 and the upper shell component form a movable seal, and there is no problem of poor sealing due to wear of the sealing ring; at the same time, it also avoids the problem of large error in displacement accuracy due to friction of the sealing ring.

[0026] The above are only preferred implementations of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

[0027] In the description of the present invention, it should 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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 a limitation on 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 one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; 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. 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 utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

Claims

1. A single-pole piece detection device, comprising a piston rod and an upper housing assembly; characterized in that: The piston rod is movably arranged on the upper shell assembly along the vertical direction; one end of the piston rod is used to abut against the test electrode, and the other end is provided with a sealing portion; the upper end of the upper shell assembly is provided with an oil seal groove adapted to the sealing portion; the oil seal groove is filled with oil; when the piston rod moves, the oil is always in contact with the sealing portion.

2. The monopole detection device according to claim 1, characterized in that: The oil is an inert oil.

3. The monopole detection device according to claim 1, characterized in that: The sealing portion is an annular clamping wall that protrudes downward in a whole circle to form at least one circle; the oil seal groove and the sealing portion are adapted to form a groove body that is recessed downward in a whole circle.

4. The monopole detection device according to any one of claims 1 to 3, characterized in that: It also includes a lower shell assembly, which includes a lower shell and a lower conductive rod connected to the lower shell; the lower shell is provided with an operating cavity with an upper opening for placing a reaction electrode, a hard diaphragm and an electrode to be tested.

5. The monopole detection device according to claim 4, characterized in that: It also includes an elastic member; the upper shell assembly includes an upper shell arranged on the lower shell, a rotary cover for connecting the upper shell and the lower shell, a cover plate connected to the upper shell, and an upper conductive rod connected to the cover plate; the piston rod is movably inserted through the upper shell and the cover plate, and one end of the piston rod is provided with an action part, which is placed in the working chamber for abutting against the test electrode; the elastic member is arranged between the action part and the upper shell; the oil seal groove is arranged on the upper end surface of the cover plate.

6. The monopole detection device according to claim 4, characterized in that: The hard diaphragm is a ceramic diaphragm for electrolysis.

7. The monopole detection device according to claim 4, characterized in that: A positioning plate is also included, which is arranged at the bottom of the lower shell and protrudes outward.

8. The monopole detection device according to claim 5, characterized in that: A plurality of sealing rings are arranged between the lower end surface of the upper shell and the upper end surface of the lower shell to form a sealed connection.

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