CN219161563U - Tightness detection device for cylindrical steel shell battery - Google Patents
Tightness detection device for cylindrical steel shell battery Download PDFInfo
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- CN219161563U CN219161563U CN202222548088.3U CN202222548088U CN219161563U CN 219161563 U CN219161563 U CN 219161563U CN 202222548088 U CN202222548088 U CN 202222548088U CN 219161563 U CN219161563 U CN 219161563U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to the technical field of lithium battery production, and provides a tightness detection device for a cylindrical steel shell battery, which comprises the following components: a base and a clamp; the base is provided with positioning cylinders which are distributed along the height direction of the base; one end of the positioning cylinder is communicated with the air supply mechanism, the other end of the positioning cylinder is used for allowing the bottom of the cylindrical steel shell battery to extend in, a sealing structure matched with the bottom of the shell is arranged in the positioning cylinder, and the sealing structure is annular; the clamp is used for clamping the cylindrical steel shell battery and is movably arranged on the base along the height direction of the base; under the condition that the shell bottom is in sealing connection with the sealing structure, the air supply mechanism charges air into the cylindrical steel shell battery through the opening of the shell bottom, and whether the liquid covered at the sealing position of the cap has bubbles or not is observed to judge the tightness of the cap; the utility model has simple operation and improves the detection efficiency of the tightness of the cap.
Description
Technical Field
The utility model relates to the technical field of lithium battery production, in particular to a tightness detection device for a cylindrical steel shell battery.
Background
In the production process of the cylindrical steel shell battery, a cap is required to seal the opening of the steel shell, so that the inside and the outside of the battery are isolated; if the sealing of the cap has defects, the pressure generated inside the cylindrical steel shell battery can discharge electrolyte along the defects, so that the cylindrical steel shell battery has certain potential safety hazards, and therefore, the tightness detection after the sealing of the cap is very important.
The existing tightness detection method is a helium detection method, which comprises the steps of placing a battery in a first chamber, maintaining for a certain period of time, filling helium with a certain pressure in the first chamber, if the tightness of the battery is poor, allowing part of helium to permeate into the battery, transferring the battery into a second chamber, vacuumizing the second chamber, detecting whether the second chamber contains helium or not by using a mass spectrometer, and if so, indicating that the tightness of the battery is unqualified; the detection method is complex in operation and low in detection efficiency.
Disclosure of Invention
The utility model provides a tightness detection device for a cylindrical steel shell battery, which is used for solving or improving the problems of complex operation and low efficiency of the traditional cylindrical steel shell battery in the tightness detection process.
The utility model provides a tightness detection device for a cylindrical steel shell battery, which comprises the following components: a base and a clamp; the base is provided with positioning cylinders which are distributed along the height direction of the base; one end of the positioning cylinder is communicated with the air supply mechanism, the other end of the positioning cylinder is used for extending into the bottom of the cylindrical steel shell battery, a sealing structure matched with the bottom of the shell is arranged in the positioning cylinder, and the sealing structure is annular;
the clamp is used for clamping the cylindrical steel shell battery and is movably arranged on the base along the height direction of the base;
and under the condition that the shell bottom is in sealing connection with the sealing structure, the air supply mechanism is used for inflating the cylindrical steel shell battery through the opening of the shell bottom.
According to the tightness detection device for the cylindrical steel shell battery provided by the utility model, the clamp comprises: the first clamping die, the second clamping die and the driving mechanism;
the first clamping die and the second clamping die are oppositely arranged, and the driving mechanism is used for driving the second clamping die to move towards one side close to the first clamping die or one side far away from the first clamping die along the clamping direction.
According to the tightness detection device for the cylindrical steel shell battery provided by the utility model, the clamp further comprises: a bottom plate;
be equipped with first slide rail on the bottom plate, first slide rail is followed the centre gripping direction extends, be equipped with first slider on the second centre gripping mould, first slider with first slide rail connection.
According to the present utility model, there is provided a tightness detecting device for a cylindrical steel-shell battery, the driving mechanism comprising: the first connecting rod, the second connecting rod and the driving rod;
one end of the first connecting rod is connected with the second clamping die, the other end of the first connecting rod is hinged with one end of the second connecting rod, the other end of the second connecting rod is hinged with the middle part of the driving rod, and one end of the driving rod is hinged with the bottom plate.
According to the tightness detection device for the cylindrical steel shell battery, provided by the utility model, the bottom plate is provided with the strip-shaped hole, the strip-shaped hole extends along the clamping direction, the first sliding rail is arranged in the strip-shaped hole, and the side walls of the two ends of the strip-shaped hole along the clamping direction are used for limiting the first sliding block.
According to the tightness detection device for the cylindrical steel shell battery, provided by the utility model, the base is further provided with the side plate, the side plate extends along the height direction of the base, the side plate is provided with the second sliding rail, the second sliding rail extends along the height direction of the base, the clamp is provided with the second sliding block, and the second sliding block is connected with the second sliding rail.
According to the tightness detection device for the cylindrical steel shell battery, provided by the utility model, one end of the second sliding rail, which is away from the base, is provided with the limiting part, and the limiting part is used for limiting the second sliding block.
According to the tightness detection device for the cylindrical steel shell battery, the clamping mechanism is further arranged on the base and detachably connected with the clamp, and the shell bottom is abutted with the sealing structure through the clamping mechanism.
According to the tightness detection device for the cylindrical steel shell battery, the clamping mechanism comprises an elbow clamp.
According to the tightness detection device for the cylindrical steel shell battery, provided by the utility model, after the shell bottom of the cylindrical steel shell battery is connected with the positioning cylinder in a sealing way through the clamp, the air supply mechanism is utilized to charge air into the cylindrical steel shell battery, so that tightness of the cap can be conveniently judged by observing whether bubbles exist in liquid at the sealing part of the cap, the operation is simple and convenient, and the detection efficiency is higher.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a tightness detection device for a cylindrical steel-shell battery provided by the utility model;
FIG. 2 is a schematic view of a base provided by the present utility model;
fig. 3 is a second schematic structural view of the tightness detection device for cylindrical steel-shell batteries provided by the utility model;
reference numerals:
1: cylindrical steel shell battery; 2: a base; 3: a clamp; 31: a first clamping die; 32: a second clamping die; 33: a driving mechanism; 331: a first link; 332: a second link; 333: a driving rod; 34: a bottom plate; 341: a bar-shaped hole; 4: a positioning cylinder; 41: a sealing structure; 5: a gas supply mechanism; 61: a first slide rail; 62: a first slider; 7: a side plate; 81: a second slide rail; 811: a limit part; 82: a second slider; 9: an elbow clamp.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the embodiments of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.
The following describes a tightness detection device for a cylindrical steel case battery provided by the present utility model with reference to fig. 1 to 3.
Before the tightness of the cylindrical steel shell battery 1 is detected, an opening is formed in the bottom of the cylindrical steel shell battery 1 in advance, so that gas can be injected into the cylindrical steel shell battery 1 through the opening.
As shown in fig. 1 to 3, the sealability detection device for a cylindrical steel can battery shown in the present embodiment includes: base 2 and anchor clamps 3.
The base 2 is provided with positioning cylinders 4, and the positioning cylinders 4 are distributed along the height direction of the base 2; one end of the positioning cylinder 4 is communicated with the air supply mechanism 5, the other end of the positioning cylinder 4 is used for extending into the bottom of the cylindrical steel shell battery 1, a sealing structure 41 matched with the bottom of the shell is arranged in the positioning cylinder 4, and the sealing structure 41 is annular, so that the positioning cylinder can be fully contacted with the bottom of the shell, and gas leakage from the joint of the sealing structure 41 and the bottom of the shell is avoided; the clamp 3 is used for clamping the cylindrical steel shell battery 1, and the clamp 3 is movably arranged on the base 2 along the height direction of the base 2; after the cylindrical steel shell battery 1 is clamped by the clamp 3, the height of the clamp 3 is reduced, so that the shell bottom gradually stretches into the positioning cylinder 4, under the condition that the shell bottom is in sealing connection with the sealing structure 41, the air supply mechanism 5 is used for inflating the cylindrical steel shell battery 1 through an opening of the shell bottom, the inflated air is preferably nitrogen, the nitrogen is stable for about 5 to 10 seconds after being inflated, liquid is uniformly sprayed on the cap at the top of the cylindrical steel shell battery 1, so that the liquid covers the sealing position of the cap, if a defect exists at the sealing position, the nitrogen leaks from the defect and forms bubbles in the liquid, and an operator judges the tightness of the cap by observing whether the bubbles exist in the liquid; wherein the liquid may be alcohol or DMC liquid (dimethyl carbonate abbreviated DMC).
The tightness detection device for the cylindrical steel shell battery, which is shown in the embodiment, is characterized in that after the shell bottom of the cylindrical steel shell battery 1 is in sealing connection with the positioning cylinder 4 through the clamp 3, the air supply mechanism 5 is utilized to charge air into the cylindrical steel shell battery 1, and then whether bubbles exist in liquid at the sealing part of the cap or not is observed, so that tightness of the cap can be conveniently judged, the operation is simple and convenient, and the detection efficiency is higher.
The height direction of the base 2 refers to the top-to-bottom or bottom-to-top direction in fig. 1.
The cap generally has two structures, one is a cap provided with a safety valve and the other is a cap not provided with a safety valve; the safety valve is used for opening to realize pressure relief when the pressure in the cylindrical steel shell battery exceeds a certain range; in practical detection, if the tightness requirement of the cap is that the cap can bear the pressure of 0.9MPa, the cap provided with the safety valve cannot generate bubbles at the sealing position of the cap before the safety valve is opened; the cap without the safety valve means that the sealing part of the cap can bear the pressure of 0.9MPa and cannot leak air.
As shown in fig. 1 and 2, the sealing structure 41 in this embodiment may be a sealing ring, where the inner diameter of the sealing ring is smaller than the outer diameter of the bottom of the cylindrical steel-shell battery 1.
In some embodiments, as shown in fig. 1 and 3, the jig 3 shown in this embodiment includes: a first clamping die 31, a second clamping die 32, and a driving mechanism 33; the first clamping die 31 and the second clamping die 32 are disposed opposite to each other, the driving mechanism 33 is configured to drive the second clamping die 32 to move toward a side close to the first clamping die 31 or a side far away from the first clamping die 31 along the clamping direction, that is, the first clamping die 31 corresponds to a fixing member, the second clamping die 32 corresponds to an active member, the second clamping die 32 moves toward a side close to the first clamping die 31 to clamp the cylindrical steel-shell battery 1, and the second clamping die 32 moves toward a side far away from the first clamping die 31 to release the cylindrical steel-shell battery 1.
The clamping direction is a left-to-right direction or a left-to-left direction in fig. 1.
In some embodiments, as shown in fig. 1 and 3, the fixture 3 shown in this embodiment further includes: a bottom plate 34; the bottom plate 34 is provided with a first slide rail 61, the first slide rail 61 extends along the clamping direction, the second clamping die 32 is provided with a first slide block 62, and the first slide block 62 is connected with the first slide rail 61.
Specifically, the first slide rail 61 plays a guiding role for the first slider 62 so that the second clamping die 32 can be stably moved in the clamping direction.
In some embodiments, as shown in fig. 1 and 3, the driving mechanism 33 shown in the present embodiment includes: a first link 331, a second link 332, and a driving lever 333; one end of the first link 331 is connected with the second clamping die 32, the other end of the first link 331 is hinged with one end of the second link 332, the other end of the second link 332 is hinged with the middle part of the driving rod 333, and one end of the driving rod 333 is hinged with the bottom plate 34.
Specifically, the first link 331 extends along the clamping direction, when the second clamping die 32 needs to be driven to be away from the first clamping die 31, the operator toggles the other end of the driving lever 333 towards the side away from the first clamping die 31, and then the driving lever 333 drives the second clamping die 32 to be away from the first clamping die 31 sequentially through the second link 332 and the first link 331; when the second clamping die 32 needs to be driven to approach the first clamping die 31, the operator toggles the other end of the driving rod 333 towards the side approaching the first clamping die 31, and then the driving rod 333 drives the second clamping die 32 to approach the first clamping die 31 through the second connecting rod 332 and the first connecting rod 331 in sequence, so as to clamp the cylindrical steel shell battery 1.
In some embodiments, as shown in fig. 3, a strip-shaped hole 341 is provided on the bottom plate 34 in this embodiment, the strip-shaped hole 341 extends along the clamping direction, the first sliding rail 61 is provided in the strip-shaped hole 341, and the side walls of the two ends of the strip-shaped hole 341 along the clamping direction are used for limiting the first sliding block 62.
Specifically, when the first slider 62 slides on the first slide rail 61, when the first slider 62 slides to one end or the other end of the first slide rail 61, the side wall of the bar-shaped hole 341 can stop the first slider 62, that is, limit the first slider 62, so that the first slider 62 can be prevented from sliding out of the first slide rail 61, and the reliability of the fixture 3 is ensured.
In some embodiments, as shown in fig. 1 to 3, the base 2 in this embodiment is further provided with a side plate 7; the side plate 7 extends along the height direction of the base, a second sliding rail 81 is arranged on the side plate 7, the second sliding rail 81 extends along the height direction of the base 2, a second sliding block 82 is arranged on the clamp 3, and the second sliding block 82 is connected with the second sliding rail 81.
Specifically, the side plates 7 are arranged in two, the two side plates 7 are arranged in parallel relatively, two ends of the bottom plate 34 are connected with a second sliding block 82, and the second sliding rail 81 plays a guiding role on the second sliding block 82, so that the bottom plate 34 can stably lift, and the reliability of connection between the bottom of the cylindrical steel shell battery 1 and the sealing ring is guaranteed.
In some embodiments, as shown in fig. 1 to 3, a limiting portion 811 is disposed at an end of the second sliding rail 81 facing away from the base 2, where the limiting portion 811 is used to limit the second sliding block 82.
Specifically, the limit portion 811 can stop the second slider 82 during lifting of the bottom plate 34, so as to prevent the second slider 82 from sliding out of the second slide rail 81, ensure the reliability of movement of the clamp 3,
in some embodiments, as shown in fig. 1 to 3, a clamping mechanism is further provided on the base 2, where the clamping mechanism is detachably connected to the clamp 3, and the bottom of the shell abuts against the sealing structure 41 through the clamping mechanism.
Specifically, the height of the bottom plate 34 is reduced, so that the bottom of the cylindrical steel-shell battery 1 gradually extends into the positioning cylinder 4 and contacts with the sealing ring, and then a downward acting force is applied to the bottom plate 34 through the clamping mechanism, so that the bottom of the cylindrical steel-shell battery 1 is abutted with the sealing ring, and the tightness between the bottom and the sealing ring is ensured, so that nitrogen is prevented from leaking from the joint between the bottom and the sealing ring in the inflation process.
In some embodiments, as shown in fig. 1 to 3, the clamping mechanism in this embodiment includes elbow clamps, the bottom plate 34 is rectangular, four elbow clamps 9 are provided, and the four elbow clamps 9 are respectively located at four corners of the bottom plate 34, so that uniformity of stress of the bottom plate 34 is ensured, and reliability of sealing between the bottom of the shell and the sealing ring is improved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (9)
1. A tightness detection device for a cylindrical steel shell battery, comprising:
the base is provided with positioning cylinders which are distributed along the height direction of the base; one end of the positioning cylinder is communicated with the air supply mechanism, the other end of the positioning cylinder is used for extending into the bottom of the cylindrical steel shell battery, a sealing structure matched with the bottom of the shell is arranged in the positioning cylinder, and the sealing structure is annular;
the clamp is used for clamping the cylindrical steel shell battery and is movably arranged on the base along the height direction of the base;
and under the condition that the shell bottom is in sealing connection with the sealing structure, the air supply mechanism is used for inflating the cylindrical steel shell battery through the opening of the shell bottom.
2. The tightness detecting device for a cylindrical steel can battery according to claim 1, wherein,
the clamp comprises: the first clamping die, the second clamping die and the driving mechanism;
the first clamping die and the second clamping die are oppositely arranged, and the driving mechanism is used for driving the second clamping die to move towards one side close to the first clamping die or one side far away from the first clamping die along the clamping direction.
3. The tightness detecting device for a cylindrical steel can battery according to claim 2, wherein,
the clamp further comprises: a bottom plate;
be equipped with first slide rail on the bottom plate, first slide rail is followed the centre gripping direction extends, be equipped with first slider on the second centre gripping mould, first slider with first slide rail connection.
4. A tightness detecting device for a cylindrical steel can battery according to claim 3, wherein,
the driving mechanism includes: the first connecting rod, the second connecting rod and the driving rod;
one end of the first connecting rod is connected with the second clamping die, the other end of the first connecting rod is hinged with one end of the second connecting rod, the other end of the second connecting rod is hinged with the middle part of the driving rod, and one end of the driving rod is hinged with the bottom plate.
5. A tightness detecting device for a cylindrical steel can battery according to claim 3, wherein,
the bottom plate is provided with a strip-shaped hole, the strip-shaped hole extends along the clamping direction, the first sliding rail is arranged in the strip-shaped hole, and side walls of two ends of the strip-shaped hole along the clamping direction are used for limiting the first sliding block.
6. The tightness detecting device for a cylindrical steel can battery according to claim 1, wherein,
the base is also provided with a side plate, the side plate extends along the height direction of the base, the side plate is provided with a second sliding rail, the second sliding rail extends along the height direction of the base, the clamp is provided with a second sliding block, and the second sliding block is connected with the second sliding rail.
7. The tightness detecting device for a cylindrical steel can battery according to claim 6, wherein,
and one end of the second sliding rail, which is away from the base, is provided with a limiting part, and the limiting part is used for limiting the second sliding block.
8. The tightness detecting device for a cylindrical steel can battery according to claim 1, wherein,
the base is also provided with a clamping mechanism which is detachably connected with the clamp, and the shell bottom is abutted with the sealing structure through the clamping mechanism.
9. The tightness detecting device for a cylindrical steel can battery according to claim 8, wherein,
the clamping mechanism includes an elbow clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222548088.3U CN219161563U (en) | 2022-09-26 | 2022-09-26 | Tightness detection device for cylindrical steel shell battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222548088.3U CN219161563U (en) | 2022-09-26 | 2022-09-26 | Tightness detection device for cylindrical steel shell battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219161563U true CN219161563U (en) | 2023-06-09 |
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ID=86619230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222548088.3U Active CN219161563U (en) | 2022-09-26 | 2022-09-26 | Tightness detection device for cylindrical steel shell battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219161563U (en) |
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2022
- 2022-09-26 CN CN202222548088.3U patent/CN219161563U/en active Active
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