Helium leak detection device

Abstract

The utility model provides a helium leakage detection device, and belongs to the technical field of battery shell leakage detection. The helium leak detection device comprises a positioning plate, a first sealing gasket and a helium supply assembly. A positioning groove is formed in the top surface of the positioning plate, and the end part, corresponding to the first end surface, of the battery shell is positioned in the positioning groove; the first sealing washer is located on the bottom surface of the positioning groove and is in sealing contact with the bottom surface of the positioning groove and the first end surface, and the to-be-detected area is located in the first sealing washer; the bottom face of the positioning groove is further provided with a negative pressure air exhaust hole, the negative pressure air exhaust hole is located in the sealing gasket, and the negative pressure air exhaust hole is used for vacuumizing a sealing space defined by the first end face, the first sealing gasket and the bottom face of the positioning groove. According to the helium leak detection device, the sealing effect is improved, the service life of the first sealing gasket is prolonged, the replacement frequency of the first sealing gasket is reduced, and the leak detection working efficiency of the battery shell is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery shell leakage detection, in particular to a helium leakage detection device. Background Art

[0002] Batteries usually use a metal battery casing to contain electrode materials and electrolytes, and the battery casing needs to be leak-tested with helium to ensure the sealing performance of the battery.

[0003] The helium leak detection device in the related art first uses an internal expansion chuck with a sealing gasket to insert into the opening of the battery casing to seal it, then evacuates the inside of the battery casing and sprays helium on the outside. By detecting whether helium has entered the battery casing, it is determined whether there is a leak.

[0004] However, the sealing gasket in this helium leak detection device is frequently damaged and is complicated to replace, which affects the efficiency of leak detection of the battery housing. Utility Model Content

[0005] The utility model provides a helium leak detection device, which can solve the problem that a sealing gasket in the helium leak detection device is frequently damaged, is complicated to replace, and affects the efficiency of leak detection.

[0006] The technical solution is as follows:

[0007] A helium leak detection device is used for leak detection of a battery housing, wherein the battery housing has a leak detection area on a first end face in the axial direction;

[0008] The helium leak detection device comprises: a positioning plate, a first sealing gasket and a helium supply assembly;

[0009] A positioning groove is provided on the top surface of the positioning plate, and the end of the battery housing corresponding to the first end surface is located in the positioning groove;

[0010] The first sealing gasket is located on the bottom surface of the positioning groove and is in sealing contact with the bottom surface of the positioning groove and the first end surface respectively, and the area to be leak-detected is located within the first sealing gasket;

[0011] A negative pressure exhaust hole is further provided on the bottom surface of the positioning groove, and the negative pressure exhaust hole is located inside the sealing gasket, and the negative pressure exhaust hole is used to vacuum the sealed space enclosed by the first end surface, the first sealing gasket and the bottom surface of the positioning groove;

[0012] The helium supply assembly is used to inject helium into the interior of the battery housing.

[0013] In some embodiments, a first receiving groove is provided on the bottom surface of the positioning groove, the first sealing gasket is located in the first receiving groove, and at least a portion of the first sealing gasket protrudes outside the first receiving groove to abut the first end face.

[0014] In some embodiments, the cross-sectional shape of the positioning groove is the same as the cross-sectional shape of the battery housing.

[0015] In some embodiments, the helium leak detection device further includes a cover and a lifting mechanism;

[0016] The cover is located above the positioning plate and is connected to the helium supply assembly;

[0017] The cover shell is connected to the lifting mechanism, and the lifting mechanism is used to drive the cover shell to move vertically. The cover shell can cover the outside of the battery housing.

[0018] In some embodiments, a helium nozzle is provided on the top of the cover, and the helium nozzle is located on the axis of the battery housing;

[0019] The second end face of the battery housing is open in the axial direction, and the helium nozzle sprays helium into the battery housing in the axial direction.

[0020] In some embodiments, the lifting mechanism includes an adapter plate, a first support plate, and a driving cylinder;

[0021] The adapter plate is connected to the top of the housing, the first support plate is located above the housing, the driving cylinder is connected to the top surface of the first support plate, and the push rod of the driving cylinder extends downward in a vertical direction and is connected to the adapter plate;

[0022] The driving cylinder drives the push rod to retract upward or extend downward, the push rod drives the adapter plate to move up and down, and the adapter plate drives the cover shell to move up and down.

[0023] In some embodiments, the lifting device further comprises at least one vertical guide rod, the bottom end of the at least one vertical guide rod being connected to the adapter plate;

[0024] The first support plate is provided with at least one guide hole, and the at least one guide rod is movably connected with the at least one guide hole.

[0025] In some embodiments, the helium leak detection device further includes a second support plate and two support columns;

[0026] The second support plate is located at the bottom of the positioning plate, and the two support columns are respectively connected between the second support plate and the first support plate.

[0027] In some embodiments, the helium leak detection device further includes a gas extraction adapter;

[0028] The air extraction adapter is located at the bottom of the positioning plate, the air extraction adapter is communicated with the negative pressure air extraction hole, and a second sealing gasket is provided between the top surface of the air extraction adapter and the bottom surface of the positioning plate.

[0029] In some embodiments, the helium leak detection device further includes a mass spectrometer, which is connected to the negative pressure exhaust hole and is used to detect whether helium exists in the gas extracted from the negative pressure exhaust hole.

[0030] The beneficial effects of the technical solution provided by the utility model include at least:

[0031] The helium leak detection device of the utility model utilizes the positioning groove on the positioning plate to position the battery shell, so that the first end face of the battery shell faces the bottom of the positioning groove and abuts against the first sealing gasket at the bottom of the positioning groove, and the first sealing gasket can surround the area to be detected for leaks on the first end face, and utilize the first end face, the first sealing gasket and the bottom surface of the positioning groove to form a sealed space outside the area to be detected for leaks, and utilize the negative pressure exhaust hole in the positioning groove to evacuate the sealed space, and the helium supply component can spray helium into the interior of the battery shell, and by detecting whether there is helium in the air extracted from the negative pressure exhaust hole, it can be determined whether the area to be detected for leaks; the first sealing gasket is pressed against the first end face and the bottom surface of the positioning groove respectively, and the pressing contact surfaces are both flat and have a large area, which is conducive to improving the sealing effect, and is conducive to increasing the service life of the first sealing gasket, reducing the replacement frequency of the first sealing gasket, and thus improving the leak detection efficiency of the battery shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 This is a structural cross-sectional view of a helium leak detection device provided by an embodiment of the present utility model;

[0034] Figure 2 This is a schematic structural diagram of a battery housing provided by an embodiment of the present utility model;

[0035] Figure 3 This is a partial structural cross-sectional view of a helium leak detection device provided by an embodiment of the present utility model;

[0036] Figure 4This is a structural diagram of a helium leak detection device provided by another embodiment of the present invention;

[0037] Figure 5 It is a partial structural cross-sectional view of a helium leak detection device provided by another embodiment of the present utility model.

[0038] The reference numerals in the figures represent respectively:

[0039] 100, battery housing; 1001, first end surface; 1002, area to be leak-checked; 1003, second end surface;

[0040] 1. Positioning plate;

[0041] 11. Positioning groove; 111. Negative pressure exhaust hole; 112. First receiving groove;

[0042] 2. First sealing gasket;

[0043] 3. Air extraction adapter;

[0044] 31. Second sealing gasket;

[0045] 4. Cover;

[0046] 41. Helium nozzle;

[0047] 5. Lifting mechanism;

[0048] 51. Adapter plate; 52. First support plate; 521. Guide hole; 53. Drive cylinder; 531. Push rod; 54. Vertical guide rod;

[0049] 6. Support column;

[0050] 7. Mass spectrometer;

[0051] 8. Second support plate. DETAILED DESCRIPTION

[0052] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the attached figures. Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] Unless otherwise defined, all technical terms used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art.

[0055] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0056] Combine Figure 1 and Figure 2 As shown, this embodiment provides a helium leak detection device for leak detection of a battery housing 100 . The battery housing 100 has a leak detection area 1002 on a first end surface 1001 along the axial direction.

[0057] The helium leak detection device comprises: a positioning plate 1, a first sealing gasket 2 and a helium supply assembly (not shown in the figure).

[0058] A positioning groove 11 is provided on the top surface of the positioning plate 1, and the end of the battery shell 100 corresponding to the first end face 1001 is located in the positioning groove 11; the first sealing gasket 2 is located on the bottom surface of the positioning groove 11, and is in sealing contact with the bottom surface of the positioning groove 11 and the first end face 1001 respectively, and the leak detection area 1002 is located in the first sealing gasket 2.

[0059] A negative pressure exhaust hole 111 is also provided on the bottom surface of the positioning groove 11. The negative pressure exhaust hole 111 is located inside the sealing gasket. The negative pressure exhaust hole 111 is used to vacuum the sealed space surrounded by the first end face 1001, the first sealing gasket 2 and the bottom surface of the positioning groove 11.

[0060] The helium supply assembly is used to inject helium into the interior of the battery housing 100 .

[0061] The helium leak detection device of this embodiment uses the positioning groove 11 on the positioning plate 1 to position the battery housing 100, so that the first end face 1001 of the battery housing 100 faces the bottom of the positioning groove 11 and abuts against the first sealing gasket 2 at the bottom of the positioning groove 11. The first sealing gasket 2 can surround the area to be leaked 1002 on the first end face 1001. A sealed space is formed outside the area to be leaked 1002 by using the first end face 1001, the first sealing gasket 2 and the bottom surface of the positioning groove 11. The sealed space can be evacuated by using the negative pressure exhaust hole 111 in the positioning groove 11. The helium supply assembly can spray helium into the interior of the battery housing 100. By detecting whether there is helium in the air extracted from the negative pressure exhaust hole 111, it can be determined whether the area to be leaked 1002 is leaking.

[0062] The first sealing gasket 2 is pressed against the first end face 1001 and the bottom surface of the positioning groove 11 respectively. The pressing contact surfaces are both flat and have a large area, which is beneficial to improving the sealing effect and the service life of the first sealing gasket 2, reducing the replacement frequency of the first sealing gasket 2, thereby improving the leakage detection efficiency of the battery casing 100.

[0063] In some possible implementations, the battery housing 100 is a cylindrical battery housing 100, and a first end surface 1001 is located at one axial end of the battery housing 100. The first end surface 1001 has a weld, i.e., the aforementioned leak detection area 1002. The other axial end of the battery housing 100 is open, and the helium supply assembly can inject helium into the battery housing 100 through the open end.

[0064] In some possible implementations, the bottom surface of the positioning groove 11 is planar.

[0065] In other possible implementations, the bottom surface of the positioning groove 11 matches the shape of the first end surface 1001. For example, the shape of the first end surface 1001 is convex, and the bottom surface of the positioning groove 11 is concave, which is beneficial to the sealing effect of the leak detection area 1002.

[0066] Combine Figure 3 As shown, in some embodiments, a first receiving groove 112 is provided on the bottom surface of the positioning groove 11, the first sealing gasket 2 is located in the first receiving groove 112, and at least a portion of the first sealing gasket 2 protrudes to the outside of the first receiving groove 112 to abut the first end face 1001.

[0067] Through the above arrangement, the first sealing gasket 2 can be positioned and fixed by the first receiving groove 112, and the part of the first sealing gasket 2 protruding outside the first receiving groove 112 is used to abut the first end face 1001 to achieve sealing of the above sealing space.

[0068] Combine Figure 1 As shown, in some embodiments, the cross-sectional shape of the positioning groove 11 is the same as the cross-sectional shape of the battery housing 100 .

[0069] Through the above arrangement, the positioning groove 11 has the same shape as the battery housing 100 , so that the battery housing 100 can be quickly positioned.

[0070] Combine Figure 4 As shown, in some embodiments, the helium leak detection device further includes a housing 4 and a lifting mechanism 5. The housing 4 is positioned above the positioning plate 1 and is connected to the helium supply assembly. The housing 4 is connected to the lifting mechanism 5, which is used to drive the housing 4 to move vertically. The housing 4 can cover the exterior of the battery housing 100.

[0071] Through the above arrangement, when it is necessary to use the helium supply assembly to spray helium into the interior of the battery housing 100, the lifting mechanism 5 drives the cover 4 to move downward to cover the entire battery housing 100, so that the helium will not escape into the external atmosphere, thereby helping to reduce helium consumption and avoid helium pollution.

[0072] Combine Figure 4 As shown, in some embodiments, a helium nozzle 41 is provided on the top of the cover 4, and the helium nozzle 41 is located on the axis of the battery housing 100; the second end face 1003 of the battery housing 100 along the axial direction is open, and the helium nozzle 41 sprays helium into the interior of the battery housing 100 along the axial direction.

[0073] In this embodiment, the helium nozzle 41 is arranged at the top of the cover 4 and is located on the axis of the battery housing 100. The helium nozzle 41 sprays helium downward along the axis of the battery housing 100, which can ensure that the helium is accurately sprayed into the interior of the battery housing 100, thereby realizing the leak detection operation of the battery housing 100.

[0074] Combine Figure 4 As shown, in some embodiments, the lifting mechanism 5 includes an adapter plate 51 , a first support plate 52 and a driving cylinder 53 .

[0075] The adapter plate 51 is connected to the top of the cover shell 4, the first support plate 52 is located above the cover shell 4, the driving cylinder 53 is connected to the top surface of the first support plate 52, and the push rod 531 of the driving cylinder 53 extends downward in the vertical direction and is connected to the adapter plate 51.

[0076] The driving cylinder 53 drives the push rod 531 to retract upward or extend downward, and the push rod 531 drives the adapter plate 51 to move up and down, and the adapter plate 51 drives the cover shell 4 to move up and down.

[0077] Through the above arrangement, the driving cylinder 53, the first support plate 52 and the adapter plate 51 can drive the cover 4 to rise and fall. During the leak detection operation, the cover 4 falls to cover the battery housing 100 to reduce the leakage of helium. After the leak detection operation is completed, the cover 4 rises to facilitate the operator to take and place the battery housing 100.

[0078] Combine Figure 4 As shown, in some embodiments, the lifting device also includes at least one vertical guide rod 54, and the bottom end of at least one vertical guide rod 54 is connected to the adapter plate 51; the first support plate 52 is provided with at least one guide hole 521, and at least one guide rod is movably connected to at least one guide hole 521.

[0079] Through the above arrangement, the vertical guide rod 54 can be used to provide precise motion guidance for the vertical movement of the adapter plate 51, thereby improving the stability and reliability of the cover shell 4 when moving in the vertical direction.

[0080] In some possible implementations, there are two vertical guide rods 54 , which are respectively arranged on both sides of the driving cylinder 53 .

[0081] Combine Figure 4 As shown, in some embodiments, the helium leak detection device further includes a second support plate 8 and two support columns 6; the second support plate 8 is located at the bottom of the positioning plate 1, and the two support columns 6 are respectively connected between the second support plate 8 and the first support plate 52.

[0082] The helium leak detection device of this embodiment utilizes the second support plate 8 to provide bottom support for the positioning plate 1 , and utilizes the two support columns 6 to provide vertical support for the lifting mechanism 5 .

[0083] Exemplarily, the two support columns 6 are symmetrically arranged on the second support plate 8 on both sides of the positioning plate 1 .

[0084] Combine Figure 5 As shown, in some embodiments, the helium leak detection device further includes an exhaust adapter 3; the exhaust adapter 3 is located at the bottom of the positioning plate 1, the exhaust adapter 3 is connected to the negative pressure exhaust hole 111, and a second sealing gasket 31 is provided between the top surface of the exhaust adapter 3 and the bottom surface of the positioning plate 1.

[0085] Through the above arrangement, the helium leak detection device of this embodiment can utilize the vacuum adapter 3 to connect the negative pressure vacuum hole 111 and connect it to the negative pressure vacuum equipment to achieve vacuuming of the sealed space.

[0086] To ensure a sealed connection between the air extraction adapter 3 and the positioning plate 1, a second sealing gasket 31 is disposed between the top surface of the air extraction adapter 3 and the bottom surface of the positioning plate 1. For example, to limit the second sealing gasket 31, a second receiving groove (not shown) may be further disposed on the top surface of the air extraction adapter 3 or the bottom surface of the positioning plate 1.

[0087] Combine Figure 5 As shown, in some embodiments, the helium leak detection device also includes a mass spectrometer 7, which is connected to the negative pressure exhaust hole 111. The mass spectrometer 7 is used to detect whether there is helium in the gas extracted from the negative pressure exhaust hole 111, so that the helium leak detection device of this embodiment can accurately detect whether there is a leak in the area to be detected 1002 of the battery casing 100.

[0088] It should be noted that in this utility model, the terms "several" and "at least one" refer to one or more, while "multiple" and "at least two" refer to two or more. "And / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0089] 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 being referred to. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0090] Unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they may refer to fixed, removable, or integral connections; mechanical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0091] In the description of the present invention, reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" 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.

[0092] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A helium leak detection device, characterized in that: Used for leak detection of a battery housing (100), wherein a leak detection area (1002) is provided on a first end surface (1001) of the battery housing (100); The helium leak detection device comprises: a positioning plate (1), a first sealing gasket (2) and a helium supply assembly; A positioning groove (11) is provided on the top surface of the positioning plate (1), and the end of the battery housing (100) corresponding to the first end surface (1001) is located in the positioning groove (11); The first sealing gasket (2) is located on the bottom surface of the positioning groove (11) and is in sealing contact with the bottom surface of the positioning groove (11) and the first end surface (1001) respectively, and the area to be leak-checked (1002) is located within the first sealing gasket (2); A negative pressure exhaust hole (111) is also provided on the bottom surface of the positioning groove (11), and the negative pressure exhaust hole (111) is located inside the sealing gasket. The negative pressure exhaust hole (111) is used to vacuum the sealed space surrounded by the first end surface (1001), the first sealing gasket (2) and the bottom surface of the positioning groove (11); The helium supply assembly is used to spray helium into the interior of the battery housing (100).

2. The helium leak detection device according to claim 1, characterized in that: The bottom surface of the positioning groove (11) is provided with a first receiving groove (112), the first sealing gasket (2) is located in the first receiving groove (112), and at least a portion of the first sealing gasket (2) protrudes to the outside of the first receiving groove (112) to abut the first end surface (1001).

3. The helium leak detection device according to claim 1, characterized in that: The cross-sectional shape of the positioning groove (11) is the same as the cross-sectional shape of the battery housing (100).

4. The helium leak detection device according to claim 1, characterized in that: The helium leak detection device further comprises a cover (4) and a lifting mechanism (5); The cover (4) is located above the positioning plate (1) and is connected to the helium supply assembly; The cover shell (4) is connected to the lifting mechanism (5), and the lifting mechanism (5) is used to drive the cover shell (4) to move vertically. The cover shell (4) can cover the outside of the battery housing (100).

5. The helium leak detection device according to claim 4, characterized in that: A helium gas nozzle (41) is provided on the top of the cover shell (4), and the helium gas nozzle (41) is located on the axis of the battery housing (100); The second end face of the battery housing (100) is open in the axial direction, and the helium nozzle (41) sprays helium into the interior of the battery housing (100) in the axial direction.

6. The helium leak detection device according to claim 4, characterized in that: The lifting mechanism (5) comprises an adapter plate (51), a first support plate (52) and a driving cylinder (53); The adapter plate (51) is connected to the top of the housing (4), the first support plate (52) is located above the housing (4), the driving cylinder (53) is connected to the top surface of the first support plate (52), and the push rod (531) of the driving cylinder (53) extends downward in a vertical direction and is connected to the adapter plate (51); The driving cylinder (53) drives the push rod (531) to retract upward or extend downward, the push rod (531) drives the adapter plate (51) to rise and fall, and the adapter plate (51) drives the cover shell (4) to rise and fall.

7. The helium leak detection device according to claim 6, characterized in that: The lifting mechanism (5) further comprises at least one vertical guide rod (54), the bottom end of the at least one vertical guide rod (54) being connected to the adapter plate (51); The first support plate (52) is provided with at least one guide hole (521), and the at least one vertical guide rod (54) is movably connected to the at least one guide hole (521).

8. The helium leak detection device according to claim 6, characterized in that: The helium leak detection device further comprises a second support plate (8) and two support columns (6); The second support plate (8) is located at the bottom of the positioning plate (1), and the two support columns (6) are respectively connected between the second support plate (8) and the first support plate (52).

9. The helium leak detection device according to claim 1, characterized in that: The helium leak detection device further includes a gas extraction adapter (3); The air extraction adapter (3) is located at the bottom of the positioning plate (1), the air extraction adapter (3) is connected to the negative pressure air extraction hole (111), and a second sealing gasket (31) is provided between the top surface of the air extraction adapter (3) and the bottom surface of the positioning plate (1).

10. The helium leak detection device according to any one of claims 1 to 9, characterized in that: described The helium leak detection device further comprises a mass spectrometer (7), wherein the mass spectrometer (7) is connected to the negative pressure exhaust hole (111). The mass spectrometer (7) is used to detect whether helium exists in the gas extracted by the negative pressure extraction hole (111).

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