Battery cell shell finished product helium detection equipment

Abstract

The utility model relates to the technical field of cell shell finished product helium detection, and discloses cell shell finished product helium detection equipment, which comprises a cover plate assembly, a shell placing piece, a seat plate, a helium mass spectrometer leak detector, an electromagnetic valve and a helium supply instrument, the shell placing piece and the seat plate are assembled, the shell placing piece is used for placing a shell finished product, and the cover plate assembly is used for covering the shell placing piece up and down. The cover plate assembly is used for sealing; the base plate is provided with a base cavity, the base cavity is communicated with the helium mass spectrometer leak detector, the helium supply instrument and the electromagnetic valve are assembled, the cover plate assembly is provided with a cover plate cavity, the cover plate cavity is communicated with the shell containing cavity, and the helium supply instrument supplies helium to the cover plate cavity through the electromagnetic valve. Thus, the helium can be supplied regularly and quantitatively, the helium is not wasted, whether a finished shell is qualified or not is monitored and judged through the helium mass spectrometer leak detector, the helium detection speed is high, and the helium detection precision is high; meanwhile, the feeding step of the finished shell is simplified, helium detection can be carried out after the finished shell is fed, the detection time is shortened, and the helium detection efficiency is improved.

Description

Technical Field

[0001] This utility model patent relates to the technical field of helium testing of finished battery cell casings, and more specifically, to helium testing equipment for finished battery cell casings. Background Technology

[0002] The main function of the battery casing is to protect the internal materials of the battery and increase the strength of the casing. The battery casing is generally formed by bending and welding metal plates. Common metal plates include aluminum plates, stainless steel, SPCC nickel-plated plates, and titanium alloys. Because the metal plates are relatively thin, there may be air leakage at the weld seams. After the casing is welded, it is necessary to perform a sealing test.

[0003] To improve detection efficiency and accuracy, helium is used to detect weld seams, and the detection is automated through a device. For example, the prior patent with authorized publication number CN220288915U discloses a helium detection device for shell weld seams, including a helium supply instrument, a placement plate, a vacuum device, a helium detection plate, and a helium detector. The helium supply instrument is used to provide helium. The placement plate is used to accommodate a battery shell, which has a welded part with an upper weld cavity and a lower weld cavity. The helium detector is connected to the lower weld cavity and is used to detect the presence of helium in the lower weld cavity. The vacuum device is connected to the placement plate and is used to evacuate the lower weld cavity. The helium detection plate is connected to the helium supply instrument and has helium channels that are connected to both the helium supply instrument and the upper weld cavity. During detection, the helium detection plate, the welded part, and the placement plate are stacked vertically.

[0004] In existing technology, the inside of the shell is evacuated by a vacuum device, and then helium is supplied by a helium supply device on the outside. This process is time-consuming and wastes helium. Utility Model Content

[0005] The purpose of this invention is to provide a helium testing device for finished battery cell casings, aiming to solve the problem of long testing time for finished casings in the prior art.

[0006] This utility model is implemented as follows: a helium testing device for finished battery cell casings includes a cover plate assembly, a casing holder, a base plate, a helium mass spectrometer leak detector, a solenoid valve, and a helium supply device. The casing holder and the base plate are stacked and sealed together. The casing holder has a casing cavity for placing the finished casing. The cover plate assembly is used to cover the casing holder and seal the casing cavity. The base plate has a base cavity that communicates with the helium mass spectrometer leak detector. The helium supply device is assembled with the solenoid valve. The cover plate assembly has a cover cavity that communicates with the casing cavity. The helium supply device supplies helium to the cover cavity via the solenoid valve.

[0007] Furthermore, the cover plate assembly includes an upper cover plate and a lower pressure plate, the upper cover plate and the lower pressure plate are stacked and fixedly arranged, the upper cover plate has an upper cover cavity, the lower pressure plate has a lower pressure cavity, the upper cover cavity and the lower pressure cavity are vertically connected and communicate with each other, the upper cover cavity and the lower pressure cavity form the cover plate cavity; the lower pressure plate is arranged vertically to cover the housing member, and the lower pressure plate is used to seal the housing cavity, and the solenoid valve controls the supply of helium gas to the upper cover cavity.

[0008] Furthermore, the cover plate assembly includes a sealing ring, which is assembled with the lower pressure plate and is sleeved on the end of the finished housing, and the sealing ring is simultaneously embedded in the housing component and the lower pressure plate.

[0009] Furthermore, the lower pressure plate has a fixed shell portion, which is arranged to bulge downwards and is arranged in a frustum shape with a larger upper part and a smaller lower part. The finished shell has a shell opening, and the fixed shell portion is fitted into the shell opening.

[0010] Furthermore, the housing component includes two side plates and two main plates, the two main plates are arranged correspondingly, the two side plates are arranged correspondingly, and the two ends of the main plates are respectively arranged to be joined with the two side plates. The two side plates and the two main plates enclose the housing cavity; the two side plates and the two main plates surround the sealing ring.

[0011] Furthermore, the side plate and the main plate form a seam inspection cavity, which is used to adjust the sealing ring.

[0012] Furthermore, the inspection chambers are arranged in a longitudinal direction, and the housing has four inspection chambers, which are arranged in a one-to-one correspondence or staggered arrangement with the four corners of the sealing ring.

[0013] Furthermore, the seat plate has a seat inspection groove, which is arranged in a downward recessed manner, and the seat inspection groove is directly or indirectly connected to the seat cavity.

[0014] Furthermore, the seat plate includes a support portion for supporting the finished shell. The support portion is laid flat with the bottom surface of the finished shell, and the cross-sectional area of ​​the support portion is smaller than the cross-sectional area of ​​the bottom surface of the finished shell. The seat inspection groove is arranged in a surrounding manner along the outer periphery of the support portion, and the cross-sectional area of ​​the seat inspection groove is larger than the cross-sectional area of ​​the bottom of the finished shell.

[0015] Furthermore, the seat cavity includes a longitudinal cavity and a transverse cavity. The upper part of the longitudinal cavity is connected to the seat inspection groove. The lower part of the longitudinal cavity extends longitudinally away from the seat inspection groove, and the lower part of the longitudinal cavity is connected to the inner end of the transverse cavity. The outer end of the transverse cavity is used to be connected to the helium mass spectrometer leak detector, and the diameter of the longitudinal cavity is larger than that of the transverse cavity.

[0016] Compared with the prior art, for the helium leak detection equipment for the finished product of the battery cell housing provided by the present utility model, during helium leak detection, the finished product of the housing is placed on the housing placement member, that is, the finished product of the housing is carried by the seat plate, and then the cover plate assembly and the housing placement member are covered up and down, making the seat cavity in a sealed state with good sealing performance, ensuring the helium leak detection effect. Then, the helium supply instrument supplies helium gas to the cover plate cavity through the solenoid valve, enabling the helium gas to be supplied in a timed and quantitative manner without wasting helium gas. If there is an airtightness problem with the finished product of the housing, the helium gas will transfer to the seat cavity and be detected by the helium mass spectrometer leak detector. If it is a qualified product, the monitored value of the helium mass spectrometer leak detector will be within the preset value range. In this way, the feeding step of the finished product of the housing is simplified. At the same time, the helium leak detection can be carried out immediately after the feeding of the finished product of the housing is completed, shortening the detection time and improving the helium leak detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an exploded schematic view of the helium leak detection equipment for the finished product of the battery cell housing provided by the present utility model;

[0018] Figure 2 is a three-dimensional schematic view of the helium leak detection equipment for the finished product of the battery cell housing provided by the present utility model;

[0019] Figure 3 is a cross-sectional schematic view of the helium leak detection equipment for the finished product of the battery cell housing provided by the present utility model;

[0020] Figure 4 is a three-dimensional schematic view of the seat plate of the helium leak detection equipment for the finished product of the battery cell housing provided by the present utility model;

[0021] Figure 5 is a three-dimensional schematic view of the housing placement member of the helium leak detection equipment for the finished product of the battery cell housing provided by the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] The implementation of the present utility model will be described in detail below with reference to specific embodiments.

[0024] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] Reference Figure 1-5 The image shown is a preferred embodiment of the present invention.

[0026] A helium testing device for finished battery cell casings includes a cover plate assembly 1, a casing housing 2, a base plate 3, a helium mass spectrometer leak detector, a solenoid valve, and a helium supply device. The casing housing 2 and the base plate 3 are stacked and sealed. The casing housing 2 has a casing cavity for placing the finished casing 4. The cover plate assembly 1 is used to cover the casing housing 2 and seal the casing cavity. The base plate 3 has a base cavity 31, which is connected to the helium mass spectrometer leak detector. The helium supply device is assembled with the solenoid valve. The cover plate assembly 1 has a cover cavity 14, which is connected to the casing cavity. The helium supply device supplies helium to the cover cavity 14 via the solenoid valve.

[0027] In the aforementioned helium testing equipment for finished battery cell casings, the finished casing 4 is placed on the housing 2 during helium testing. The housing 4 is supported by the base plate 3, and then the cover plate assembly 1 and housing 2 are closed to seal the housing cavity 31, ensuring good sealing and effective helium testing. Helium is then supplied to the cover cavity 14 via a solenoid valve, allowing for timed and quantitative helium supply without waste. If the finished casing 4 has an airtightness issue, helium will transfer to the housing cavity 31 and be detected by the helium mass spectrometer leak detector. If the product is qualified, the leak detector reading will be within the preset range. This simplifies the loading process for the finished casing 4, and helium testing can be performed immediately after loading, shortening testing time and improving efficiency.

[0028] The cover plate assembly 1 can be mounted on a cylinder, and the cover plate assembly 1 can be raised or lowered by the cylinder to achieve automatic closing and opening, effectively ensuring the sealing effect.

[0029] The cover plate assembly 1 includes an upper cover plate 12 and a lower pressure plate 13. The upper cover plate 12 and the lower pressure plate 13 are stacked and fixedly arranged. The upper cover plate 12 has an upper cover cavity, and the lower pressure plate 13 has a lower pressure cavity. The upper cover cavity and the lower pressure cavity are connected vertically and vertically, forming a cover plate cavity 14. The lower pressure plate 13 is arranged to cover the housing 2 vertically, and the lower pressure plate 13 is used to seal the housing cavity. The solenoid valve controls the supply of helium to the upper cover cavity.

[0030] In this way, through the cooperation of the upper cover cavity and the lower pressure cavity, during helium testing, helium gas is sequentially delivered to the finished shell 4 through the upper cover cavity and the lower pressure cavity; at the same time, the sealing effect of the lower pressure plate 13 ensures the helium testing effect.

[0031] The cover plate assembly 1 includes a sealing ring 11, which is assembled with the lower pressure plate 13. The sealing ring 11 is sleeved on the end of the shell 4, and the sealing ring 11 is simultaneously embedded in the shell 2 and the lower pressure plate 13. In this way, the sealing effect is greatly guaranteed by the sealing ring 11, thereby ensuring the subsequent helium detection effect.

[0032] The lower pressure plate 13 has a fixed shell part 131, which is arranged to protrude downwards and is arranged in a frustum shape with a larger upper part and a smaller lower part. The shell finished product 4 has a shell opening, and the fixed shell part 131 is fitted with the shell opening.

[0033] In this way, when the shell product 4 is loaded and the cover plate assembly 1 closes, the shell product 4 will not be squeezed by the fixed shell part 131, which facilitates the closing and sealing of the cover plate assembly 1.

[0034] The housing component 2 includes two side plates 22 and two main plates 21. The two main plates 21 are arranged in a corresponding manner, and the two side plates 22 are arranged in a corresponding manner. The two ends of the main plates 21 are respectively connected to the two side plates 22. The two side plates 22 and the two main plates 21 enclose and form a housing cavity. The two side plates 22 and the two main plates 21 surround the sealing ring 11, thereby achieving a full enclosure seal for the finished housing 4.

[0035] The side plate 22 and the main plate 21 form a seam inspection cavity, which is used to adjust the sealing ring 11; this facilitates the adjustment of the sealing ring 11 and ensures the sealing effect of the sealing ring 11.

[0036] The inspection chambers are arranged in a longitudinal direction. The housing 2 has four inspection chambers, which correspond one-to-one with or are staggered with the four corners of the sealing ring 11. This facilitates the installation of the sealing ring 11 and ensures its sealing effect.

[0037] The base plate 3 has a base inspection groove 32, which is arranged in a downward recessed manner, and the base inspection groove 32 is directly or indirectly connected to the base cavity 31; in this way, once the finished shell 4 has an airtightness problem, helium will be transferred from the base inspection groove 32 to the base cavity 31 and detected by the helium mass spectrometer leak detector, quickly detecting the unqualified product.

[0038] The base plate 3 includes a support part 33, which is used to support the finished shell 4. The support part 33 and the bottom surface of the finished shell 4 are laid flat, and the support part 33 ensures the placement of the finished shell 4.

[0039] The finished shell 4 is hexagonal in shape, with the top surface being open and exposed, the bottom surface overlapping the support part 33, and the sides being welded together. The shell 4 is formed by welding the ground to the sides. The finished shell 4 has side welds and bottom welds, which are often the locations that cause poor airtightness.

[0040] The cross-sectional area of ​​the bearing part 33 is smaller than the cross-sectional area of ​​the bottom surface of the shell finished product 4. The inspection groove 32 is arranged in a surrounding manner along the outer periphery of the bearing part 33, and the cross-sectional area of ​​the inspection groove 32 is larger than the cross-sectional area of ​​the bottom of the shell finished product 4. In this way, if a sealing problem occurs in the shell finished product 4, whether it is a weld seam or a bottom weld seam, helium gas will enter the inspection groove 32 and be detected by the helium mass spectrometer leak detector, resulting in high accuracy of helium detection.

[0041] The seat cavity 31 includes a longitudinal cavity and a transverse cavity. The upper part of the longitudinal cavity is connected to the seat detection groove 32, and the lower part of the longitudinal cavity extends longitudinally away from the seat detection groove 32. The lower part of the longitudinal cavity is connected to the inner end of the transverse cavity, and the outer end of the transverse cavity is used to connect with the helium mass spectrometer leak detector; this facilitates the cooperation between the seat plate 3 and the helium mass spectrometer leak detector.

[0042] The diameter of the longitudinal cavity is larger than that of the transverse cavity; this helps to increase the flow rate of helium gas, improve monitoring efficiency, and enable the helium mass spectrometer leak detector to quickly detect unqualified products.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A helium inspection apparatus for cell case finished products, characterized by, The device includes a cover plate assembly, a housing component, a base plate, a helium mass spectrometer leak detector, a solenoid valve, and a helium supply device. The housing component and the base plate are stacked and sealed together. The housing component has a housing cavity for placing the finished housing. The cover plate assembly is used to cover the housing component and seal the housing cavity. The base plate has a seat cavity that communicates with the helium mass spectrometer leak detector. The helium supply device is assembled with the solenoid valve. The cover plate assembly has a cover plate cavity that communicates with the housing cavity. The helium supply device supplies helium to the cover plate cavity via the solenoid valve.

2. The finished battery cell case helium inspection apparatus of claim 1, wherein, The cover plate assembly includes an upper cover plate and a lower pressure plate. The upper cover plate and the lower pressure plate are stacked and fixedly arranged. The upper cover plate has an upper cover cavity, and the lower pressure plate has a lower pressure cavity. The upper cover cavity and the lower pressure cavity are vertically connected and communicate with each other, forming the cover plate cavity. The lower pressure plate and the housing are arranged in an upper and lower cover configuration, and the lower pressure plate is used to seal the housing cavity. The solenoid valve controls the supply of helium gas to the upper cover cavity.

3. The finished battery cell case helium inspection apparatus of claim 2, wherein, The cover plate assembly includes a sealing ring, which is assembled with the lower pressure plate and is sleeved on the end of the finished housing. The sealing ring is also simultaneously embedded in the housing component and the lower pressure plate.

4. The finished battery cell case helium inspection apparatus of claim 2, wherein, The lower pressure plate has a fixed shell portion, which is arranged to bulge downwards and is arranged in a frustum shape with a larger upper part and a smaller lower part. The finished shell has a shell opening, and the fixed shell portion is fitted into the shell opening.

5. The finished battery cell case helium inspection apparatus of claim 3, wherein, The housing component includes two side plates and two main plates. The two main plates are arranged in a corresponding manner, and the two side plates are arranged in a corresponding manner. The two ends of the main plates are respectively connected to the two side plates. The two side plates and the two main plates enclose the housing cavity. The two side plates and the two main plates surround the sealing ring.

6. The finished battery cell case helium inspection apparatus of claim 5, wherein, The side plate and the main plate form a seam inspection cavity, which is used to adjust the sealing ring.

7. The finished battery cell case helium inspection apparatus of claim 6, wherein, The inspection chambers are arranged in a longitudinal direction, and the housing has four inspection chambers. The four inspection chambers correspond one-to-one with the four corners of the sealing ring or are arranged in a staggered manner.

8. The finished battery cell case helium inspection apparatus according to any one of claims 1 to 7, wherein The seat plate has a seat inspection groove, which is arranged in a downward recessed manner, and the seat inspection groove is directly or indirectly connected to the seat cavity.

9. The finished battery cell case helium inspection apparatus of claim 8, wherein, The seat plate includes a support portion for supporting the finished shell. The support portion is laid flat with the bottom surface of the finished shell, and the cross-sectional area of ​​the support portion is smaller than the cross-sectional area of ​​the bottom surface of the finished shell. The seat inspection groove is arranged in a surrounding manner along the outer periphery of the support portion, and the cross-sectional area of ​​the seat inspection groove is larger than the cross-sectional area of ​​the bottom of the finished shell.

10. The finished battery cell case helium inspection apparatus of claim 8, wherein, The seat cavity includes a longitudinal cavity and a transverse cavity. The upper part of the longitudinal cavity is in communication with the seat detection slot, and the lower part of the longitudinal cavity extends longitudinally away from the seat detection slot. The lower part of the longitudinal cavity is in communication with the inner end of the transverse cavity, and the outer end of the transverse cavity is in communication with the helium mass spectrometer leak detector. The diameter of the longitudinal cavity is larger than the diameter of the transverse cavity.

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