Lithium battery cover plate helium detection tool

Abstract

The lithium battery cover plate helium detection tool comprises a base and a downward pressing assembly, the base is provided with a plurality of positioning holes used for positioning a cover plate of a lithium battery, the side portion of each positioning hole is provided with an opening, the inner wall of each positioning hole is sleeved with a sealing piece, the middle of each sealing piece is provided with a center hole, and the center hole is provided with an opening. The upper end face of the cover plate placed in the positioning hole is flush with the upper end face of the positioning hole, a gap is formed between the outer side face of the cover plate and the inner side face of the positioning hole, a protruding cover matched with the positioning hole in shape is arranged at the lower end of the downward pressing assembly, and when downward pressing is conducted, the protruding cover stretches into the gap, and the protruding cover is clamped in the gap. The space among the cover plate, the center hole and the bottom wall of the positioning hole is a sealed space, and the pressing assembly and the cover plate are further provided with reserved holes for insertion of an air supply pipe. Therefore, the cover plate can be prevented from being crushed; and when the cover plate slightly rotates, the rotation of the cover plate does not influence the sealing environment because the convex cover directly abuts against the sealing element.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery cover plate helium detection technical field especially relates to a lithium battery cover plate helium detection tool. BACKGROUND

[0002] Lithium battery is a kind of battery by lithium metal or lithium alloy as positive / negative electrode material, using non-aqueous electrolyte solution, due to the chemical properties of lithium metal is very active, make the processing, preservation, use of lithium metal, the environment requirement is very high, with the development of science and technology, now lithium battery has become mainstream, and the sealing performance of lithium battery is directly related to the safety performance of lithium battery, the important detection method for currently commonly used detection lithium battery sealing performance is helium detection, helium detection can quickly, accurately detect the sealing property of lithium battery, help to find and repair possible problems in time, ensure the safety performance of battery in use.

[0003] Battery cover plate helium detection is an important quality control means, for detecting the sealing performance of battery cover plate. This process ensures that the battery does not leak during use, thereby ensuring the safety and reliability of the battery.

[0004] At present, the helium detection of battery cover plate is to fix the battery cover plate to be detected on the detection fixture, connect the helium device to the detection equipment, inject helium into the detection chamber, and make the helium diffuse fully to form enough helium molecules on the battery cover plate, reduce the air pressure of the detection chamber, and observe whether there is helium leakage. If there is leakage, the detector will give an alarm and prompt the leakage position. If there is no leakage, the detector will show that the detection is qualified.

[0005] However, the current battery cover plate helium detection fixture is easy to press the part of the cover plate, and once the cover plate is slightly rotated after being fixed in the fixture, the sealing environment will be poor, which will affect the accuracy of the subsequent helium detection. SUMMARY

[0006] To solve the technical problems in the background art, the utility model provides a lithium battery cover plate helium detection tool.

[0007] The utility model provides a lithium battery cover plate helium detection tool, including base and down pressure subassembly, be equipped with a plurality of positioning hole for positioning the cover plate of lithium battery on the base, the side of positioning hole is equipped with opening, inner wall is equipped with sealing element, the centre hole is equipped with in the middle part of sealing element, the upper end surface of the cover plate of being placed into the positioning hole and the upper end surface of positioning hole are flush, the outside and the inside of positioning hole are equipped with gap, the lower extreme of down pressure subassembly is equipped with the convex cover of with the shape matching of positioning hole, when down pressure, the convex cover is into the gap, the space between the cover plate, the centre hole and the bottom wall of positioning hole is equipped as sealed space, down pressure subassembly and the cover plate still are equipped with the reserved hole of gas pipe insertion.

[0008] Preferably, the down pressure subassembly comprises:

[0009] The fixed plate is located above the base and is parallel to the base.

[0010] The down pressure plate is fixed to the lower end of the fixed plate, and the convex cover is arranged at the lower end of the down pressure plate.

[0011] The air cylinder fixed plate is located above the fixed plate and is parallel to the fixed plate, and an air cylinder is fixed to the lower end of the air cylinder fixed plate. The output end of the air cylinder is fixed to the upper end of the fixed plate, and a guide telescopic structure is further arranged between the air cylinder fixed plate and the base.

[0012] Preferably, the guide telescopic structure comprises a telescopic rod, one end of the telescopic rod is fixed to the base, and the other end of the telescopic rod passes through a guide hole in the fixed plate and is fixed to the lower end of the air cylinder fixed plate.

[0013] Preferably, the guide telescopic structure comprises two, and the two guide telescopic structures are respectively located on both sides of the upper end of the base.

[0014] Preferably, the convex cover is an arc-shaped cover.

[0015] Preferably, the tab of the cover plate is located outside the opening of the positioning hole, and the cover plate can rotate within the positioning hole by an angle of 30°. However, the current battery cover plate helium detection clamp is easy to press the cover plate in some positions, and once the cover plate is slightly rotated after being fixed in the clamp, the sealing environment will be poor, which will affect the accuracy of the subsequent helium detection.

[0016] In conclusion, the utility model has the following beneficial effects: through the cover of lithium cell is placed in the sealing element of positioning hole, sealing element close positioning hole inner wall, the space between cover, sealing element center hole and positioning hole bottom wall is equipped as sealed space, when pressing down, the convex cover of pressing down subassembly extends into the gap of cover and positioning hole, and the side of positioning hole is equipped with opening, the tab of cover is located outside opening, so, can avoid the cover to be pressed and hurt, and when the cover slightly rotates, because the convex cover directly abuts on the sealing element, the rotation of cover will not affect the sealed environment.

[0017] Additional aspects and advantages of the application will be described in the following description, will become apparent from the following description, or will be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model discloses a lithium battery cover helium detection tool's solid Figure One ;

[0019] Figure 2 The utility model discloses a lithium battery cover helium detection tool's solid Figure Two ;

[0020] Figure 3 The utility model discloses a lithium battery cover helium detection tool's solid Figure Three .

[0021] In the drawing:

[0022] 1, base plate, 2, positioning hole, 3, sealing ring, 4, center hole, 5, cover, 6, arc cover, 7, reserved hole, 8, fixed plate, 9, pressing plate, 10, cylinder fixed plate, 11, telescopic rod, 12, tab, 13, opening. DETAILED DESCRIPTION

[0023] The embodiments of the utility model are described in detail below, and the examples of the embodiments are represented in the drawings, wherein the same or similar symbols represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model and cannot be understood as limiting the utility model.

[0024] As Figures 1-3As shown, the lithium battery cover plate helium detection tool provided by the embodiment comprises a base 1 and a pressing assembly, the base 1 is provided with a plurality of positioning holes 2 for positioning the cover plate 5 of the lithium battery, the side of the positioning hole 2 is provided with an opening 13, the inner wall of the positioning hole 2 is provided with a sealing element, the center hole 4 of the sealing element is provided in the middle part, the upper end face of the cover plate 5 inserted into the positioning hole 2 is flush with the upper end face of the positioning hole 2, the outer side face is provided with a gap with the inner side face of the positioning hole 2, the lower end of the pressing assembly is provided with a protruding cover matched with the shape of the positioning hole 2, when pressing, the protruding cover extends into the gap, the space between the cover plate 5, the center hole 4 and the bottom wall of the positioning hole 2 is provided as a sealed space, the pressing assembly and the cover plate 5 are further provided with a reserved hole 7 for inserting a gas pipe. After the cover plate 5 is fixed by pressing, helium is filled into the sealed space below the cover plate 5 through the gas pipe, the sealed space is connected with a detection chamber, if there is helium leakage, the leaked helium will flow into the detection chamber, and the sealing performance of the cover plate can be judged by observing whether there is helium in the detection chamber.

[0025] Specifically, the tab 12 of the cover plate 5 is located outside the opening of the positioning hole 2, which can avoid the tab being pressed and injured, and the cover plate 5 can rotate within a range of 30° in the positioning hole 2. The rotation of the cover plate 5 within the range of 30° is all in the process of helium detection, which does not affect the helium detection effect and greatly improves the efficiency.

[0026] In this way, by placing the cover plate 5 of the lithium battery on the sealing element in the positioning hole 2, the sealing element is tightly attached to the inner wall of the positioning hole 2, the space between the cover plate 5, the center hole 4 of the sealing element and the bottom wall of the positioning hole 2 is provided as a sealed space, when pressing, the protruding cover of the pressing assembly extends into the gap between the cover plate 5 and the positioning hole 4, and the side of the positioning hole 2 is provided with an opening 13, the tab 12 of the cover plate 5 is located outside the opening 13, in this way, the cover plate 5 can be prevented from being pressed and injured; and when the cover plate 5 slightly rotates, the protruding cover directly abuts on the sealing element, so that the rotation of the cover plate does not affect the sealing environment.

[0027] Further, the pressing assembly comprises:

[0028] A fixed plate 8 is located above the base 1 and parallel to the base 1;

[0029] A pressing plate 9 is fixed at the lower end of the fixed plate 8, and the protruding cover is arranged at the lower end of the pressing plate 9;

[0030] The protruding cover is provided as an arc-shaped cover 6.

[0031] A gas cylinder fixed plate 10 is located above the fixed plate 8 and parallel to the fixed plate 8, the lower end of the gas cylinder fixed plate 10 is fixed with a gas cylinder, the output end of the gas cylinder is fixed with the upper end of the fixed plate 8, and a guide telescopic structure is further arranged between the gas cylinder fixed plate 10 and the base 1.

[0032] Further, the guide telescopic structure comprises a telescopic rod 11, one end of the telescopic rod 11 is fixed on the base 1, the other end is fixed on the lower end of the cylinder fixing plate 10 through the guide hole on the fixing plate 8.

[0033] Specifically, two guide telescopic structures are arranged on both sides of the upper end of the base 1, so that the stability of the downward movement of the downward pressing plate 9 can be ensured.

[0034] It should be noted that the sealing member is a sealing ring 3, the outer wall of the sealing ring 3 is in close contact with the inner side wall of the positioning hole 2, and the center hole 4 is an approximately square hole, and the edge portion near the opening side of the positioning hole 2 is an arc-shaped edge.

[0035] The air pipe is inserted into the reserved hole 7 on the downward pressing plate 9 and the cover plate 5, the cover plate 5 is placed on the sealing ring 3 in the positioning hole 2, when the device is started, the cylinder is pressed downward, the downward pressing plate 9 is pushed to move downward until it is pressed on the stop frame of the cover plate 5, at this time, the arc-shaped cover 6 at the lower end of the downward pressing plate 9 extends into the gap between the cover plate 5 and the inner side wall of the positioning hole 2 and abuts against the sealing ring 3, helium is introduced through the air pipe, if the helium leaks, helium will enter the sealing space below the cover plate 5, the leaked helium flows into the detection chamber, and the sealing performance of the cover plate 5 does not meet the requirements; if there is no helium in the detection chamber, the sealing performance of the cover plate 5 is good.

[0036] In the embodiment, the two ends of the telescopic rod 11 are provided with threaded holes, the lower end is fixed on the counterbore on the upper end surface of the base 1 through a screw, and the upper end is connected with the lower end of the cylinder fixing plate 10 through a screw, and the downward pressing plate is connected with the threaded hole in the fixing plate 8 through a screw in the counterbore.

[0037] It should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In addition, the terms "first", "second" are only for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0039] In the present application, unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise expressly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise expressly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0041] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A lithium battery cover plate helium detection tooling, comprising a base and a pressing assembly, characterized in that, The base is provided with a plurality of positioning holes for positioning the cover plate of the lithium battery, the side of the positioning hole is provided with an opening, the inner wall of the positioning hole is provided with a sealing element, the middle of the sealing element is provided with a center hole, the upper end surface of the cover plate inserted into the positioning hole is flush with the upper end surface of the positioning hole, the outer side surface of the cover plate is provided with a gap with the inner side surface of the positioning hole, the lower end of the pressing assembly is provided with a protruding cover matched with the shape of the positioning hole, when pressing, the protruding cover extends into the gap, the space between the cover plate, the center hole and the bottom wall of the positioning hole is a sealed space, the pressing assembly and the cover plate are also provided with a reserved hole for inserting the gas pipe.

2. The lithium battery cover plate helium detection tooling according to claim 1, wherein, The pressing assembly comprises: a fixed plate located above the base and parallel to the base; a pressing plate fixed to the lower end of the fixed plate, and the protruding cover is arranged at the lower end of the pressing plate; a gas cylinder fixed plate located above the fixed plate and parallel to the fixed plate, and a gas cylinder is fixed to the lower end of the gas cylinder fixed plate, the output end of the gas cylinder is fixed to the upper end of the fixed plate, and a guide telescopic structure is further arranged between the gas cylinder fixed plate and the base.

3. The lithium battery cover plate helium detection tooling of claim 2, wherein, The guide telescopic structure comprises a telescopic rod, one end of the telescopic rod is fixed to the base, and the other end of the telescopic rod passes through a guide hole in the fixed plate and is fixed to the lower end of the gas cylinder fixed plate.

4. The lithium battery cover plate helium detection tooling of claim 3, wherein, The guide telescopic structure comprises two, and the two guide telescopic structures are respectively located on both sides of the upper end of the base.

5. The lithium battery cover plate helium detection tooling of claim 1, wherein, The protruding cover is arranged as an arc-shaped cover.

6. The lithium battery cover plate helium detection tooling of claim 1, wherein, The tab of the cover plate is located outside the opening of the positioning hole, and the cover plate can rotate within the positioning hole by 30°.

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