Shell air tightness test tool and air tightness test system

Abstract

The utility model discloses a shell air tightness test tool and an air tightness test system, the air tightness test tool comprises a support main body, an auxiliary assembly and a plurality of clamping assemblies, and the support main body is provided with a support surface; the auxiliary assembly comprises an auxiliary plate and a first sealing piece, the auxiliary plate comprises a bottom plate part and a vertical plate part which are connected, the bottom plate part abuts against the supporting face, the vertical plate part is perpendicularly arranged relative to the bottom plate part, the first sealing piece is arranged on the side, away from the supporting face, of the auxiliary plate, and the vertical plate part is used for abutting against the inner wall face of a shell to be tested. The first sealing element is used for abutting against the edge of a to-be-tested shell; the clamping assemblies are arranged on the supporting body and surround the periphery of the bottom plate part, each clamping assembly comprises a supporting assembly block and a clamping piece, the clamping pieces are arranged on the supporting assembly blocks, and the clamping pieces are configured to abut against the edge of a shell to be tested when in the locking state. By means of the structure, the edge of the shell can be clamped and sealed, and airtightness detection can be carried out when gas is introduced into the shell.

Description

TECHNICAL FIELD

[0001] The utility model embodiment relates to test equipment field especially, it is a kind of gas tightness tool and gas tightness test system of shell. BACKGROUND

[0002] With the continuous development of energy storage technology, the safety performance of battery pack as the energy storage cell is more and more important, especially the sealing performance of battery pack, which affects the normal use of battery pack, and the gas tightness of battery pack depends largely on the gas tightness of shell, so the gas tightness of battery pack shell needs to be tested to exclude unqualified battery pack shell.

[0003] At present, the detection method of battery pack shell on the market is to detect the gas tightness by applying normal pressure to compress the shell cover to be detected and injecting gas to detect the gas pressure change in the shell cover, and generally the middle part of the shell cover is directly pressurized, and the shell cover edge is raised during the pressurizing process, which affects the detection result of gas tightness detection, which brings inconvenience, so a shell gas tightness test tool needs to be designed. UTILITY MODEL CONTENT

[0004] In order to solve the above technical problems, the utility model embodiment provides a shell gas tightness test tool and gas tightness test system which are convenient to use.

[0005] The utility model embodiment solves its technical problems by adopting the following technical scheme:

[0006] A shell gas tightness test tool, comprising a support main body, an auxiliary assembly and a plurality of clamping assemblies, the support main body is provided with a support surface; the auxiliary assembly comprises an auxiliary plate and a first sealing element, the auxiliary plate comprises a bottom plate part and a vertical plate part connected with each other, the bottom plate part abuts against the support surface, the vertical plate part is vertically arranged relative to the bottom plate part, the first sealing element is arranged on the side of the auxiliary plate away from the support surface, the vertical plate part is used for abutting against the inner wall surface of the shell to be tested, and the first sealing element is used for abutting against the edge of the shell to be tested; a plurality of clamping assemblies are arranged on the support main body and surround the periphery of the bottom plate part, the clamping assembly comprises a support block and a clamping piece, the support block is provided with a limiting step for abutting against the shell to be tested, the clamping piece is arranged on the support block, and the clamping piece is configured to abut against the edge of the shell to be tested when in the locked state and constrain the shell to be tested to move in the direction perpendicular to the support surface.

[0007] In some embodiments, the clamping member comprises a telescopic cylinder, a movable arm hinged to a telescopic end of the telescopic cylinder, and a connecting rod having two ends connected to the movable arm and the cylinder body of the telescopic cylinder respectively; when the telescopic end of the telescopic cylinder is extended, the movable arm rotates relative to the telescopic end of the telescopic cylinder to a locked position, and the movable arm presses against the edge of the shell to be tested to be in the locked state; when the telescopic end of the telescopic cylinder is retracted, the movable arm rotates relative to the telescopic end of the telescopic cylinder to an unlocked position.

[0008] In some embodiments, the support block comprises a first support block and a second support block connected together, the first support block is provided with the limiting step on one side of the bottom plate part, the first support block is provided with the clamping member, and the second support block is connected to the support body.

[0009] In some embodiments, the second support block comprises a first support part and a second support part connected together, the first support part and the second support part are arranged at an angle, the first support part is provided with a first adjusting groove extending in a first direction, and the first direction is perpendicular to the support surface.

[0010] In some embodiments, the second support part is provided with a second adjusting groove configured to extend in a second direction, and the first direction is perpendicular to the second direction.

[0011] In some embodiments, the air tightness test tool further comprises a lateral sealing assembly connected to the support body and a second sealing member for being arranged on a side wall of a shell to be tested for abutting against the vertical plate part, and the lateral sealing assembly is used for pressing against the second sealing member.

[0012] In some embodiments, the lateral sealing assembly comprises a bracket and a lateral cylinder, one end of the bracket is connected to the support body, the other end of the bracket is connected to the lateral cylinder, and a telescopic end of the lateral cylinder faces the second sealing member.

[0013] In some embodiments, the support body comprises a support platform and a plurality of support members, one end of each of the plurality of support members is connected to the support platform, the other end of each of the plurality of support members is used for abutting against the bottom plate part, the plurality of support members are polygonally distributed on the support platform, and the plurality of support members collectively form the support surface on a side away from the support platform.

[0014] In some embodiments, the support member is an L-shaped corner code.

[0015] The embodiments of the utility model solve the technical problems by adopting the following technical solutions:

[0016] The air tightness testing system comprises the air tightness testing tool.

[0017] The air tightness testing tool of the shell provided in the embodiment of the application comprises a supporting main body, an auxiliary assembly and a plurality of clamping assemblies, the supporting main body is provided with a supporting surface; the auxiliary assembly comprises an auxiliary plate and a first sealing element, the auxiliary plate comprises a bottom plate portion and a vertical plate portion connected with each other, the bottom plate portion is in abutment with the supporting surface, the vertical plate portion is vertically arranged relative to the bottom plate portion, the first sealing element is arranged on a side of the auxiliary plate away from the supporting surface, the vertical plate portion is used for abutting against an inner wall surface of the shell to be tested, and the first sealing element is used for abutting against an edge of the shell to be tested; the plurality of clamping assemblies are arranged on the supporting main body and surround a periphery of the bottom plate portion, each clamping assembly comprises a supporting block and a clamping element, the supporting block is provided with a limiting step used for abutting against the shell to be tested, and the clamping element is arranged on the supporting block, and the clamping element is configured to abut against and press the edge of the shell to be tested when in a locking state and to restrict the shell to be tested from moving in a direction perpendicular to the supporting surface. In this way, the shell edge can be clamped and sealed by using the testing tool, the risk of edge lifting is reduced, the air tightness detection can be facilitated when the shell is filled with gas, and the testing tool is convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0018] One or more embodiments are illustrated by way of example in the figures that are part of this disclosure and which are illustrative, but not restrictive, of the present embodiments, wherein elements having the same reference number designates like elements throughout the various figures, and wherein the figures are not necessarily drawn to scale.

[0019] Figure 1 is a schematic view of the air tightness testing tool of one of the embodiments of the application;

[0020] Figure 2 is Figure 1 a schematic view of the air tightness testing tool in

[0021] Figure 3 is Figure 1 a structural schematic view of the supporting main body in

[0022] Figure 4 is a structural schematic view of the auxiliary assembly arranged on the supporting main body;

[0023] Figure 5 is Figure 1 a schematic view of the clamping assembly in

[0024] Figure 6 is a distribution schematic view of the plurality of clamping assemblies of one of the embodiments of the application;

[0025] Figure 7is a distribution diagram of a plurality of clamping assemblies of another embodiment of the present application;

[0026] in the figure:

[0027] 1, air tightness test tool; 2, support main body; 3, auxiliary assembly; 4, clamping assembly; 5, lateral sealing assembly; 6, second sealing element;

[0028] 21, support platform; 22, support element; 201, support surface;

[0029] 31, auxiliary plate; 32, first sealing element;

[0030] 311, bottom plate part; 312, vertical plate part;

[0031] 41, support block; 42, clamping element;

[0032] 401, limiting step;

[0033] 411, first support block; 412, second support block; 4111, spring pin;

[0034] 4121, first support part; 4122, second support part;

[0035] 41211, first adjusting groove; 41221, second adjusting groove;

[0036] 421, telescopic cylinder; 422, movable arm; 423, connecting rod;

[0037] 51, bracket; 52, lateral cylinder. DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of the present application, the present application will be described in more detail below in combination with the drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element or one or more intervening elements can be present therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "upper", "lower", "inner", "outer", "vertical", "horizontal" and the like used in the present specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0039] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0040] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] It should be understood that the casing in the following description can be the casing of a battery pack that houses energy storage cells, or the casing of other products, and can refer to the casing of any product that needs to be tested for airtightness.

[0042] like Figures 1-2 As shown, Figure 1 This paper shows a schematic diagram of the airtightness testing fixture 1 of this application. Figure 2 The diagram shows a schematic of the airtightness testing fixture 1 of this application clamping the shell to be tested. The airtightness testing fixture 1 provided in one embodiment of this application includes a support body 2, an auxiliary component 3 and a plurality of clamping components 4. The auxiliary component 3 and the plurality of clamping components 4 are both disposed on the support body 2, and the plurality of clamping components 4 are arranged around the periphery of the auxiliary component 3. The auxiliary component 3 is used to assist in placing the shell to be tested, and the plurality of clamping components 4 are used to clamp and fix the shell to be tested.

[0043] In some embodiments, such as Figure 3 As shown, the support body 2 includes a support platform 21 and multiple support members 22. One end of each support member 22 is connected to the support platform 21, and the other end of each support member 22 is used to abut against the auxiliary component 3. The multiple support members 22 are distributed in a polygonal pattern on the support platform 21. The side of each support member 22 away from the support platform 21 forms a support surface 201, which supports the auxiliary component 3. In this embodiment, the support member 22 is an L-shaped bracket. The support platform 21 has multiple connecting holes. The L-shaped bracket is connected to the threaded holes on the support platform 21 by bolts or other connecting parts. The L-shaped bracket also has elongated holes, which allow the L-shaped bracket to be flexibly connected to the required position on the support platform 21.

[0044] In some embodiments, there are four support members 22, which are arranged in a quadrilateral pattern on the surface of the support platform 21. The end faces of the four platforms facing away from the surface of the support platform 21 together constitute the support surface 201.

[0045] It can be understood that the plurality of supports 22 can be formed by protruding from a partial area of the surface of the support platform 21, or can be parts detachably connected to the support platform 21, and can be selected and arranged as needed.

[0046] In some embodiments, as shown in Figure 4 The auxiliary assembly 3 includes an auxiliary plate 31 and a first sealing member 32. The auxiliary plate 31 includes a bottom plate portion 311 and a vertical plate portion 312 connected to each other. The bottom plate portion 311 abuts against the support surface 201. The vertical plate portion 312 is arranged vertically relative to the bottom plate portion 311 and is used to abut against the inner wall surface of the shell to be tested, so that the shell to be tested can be quickly positioned to the position to be tested. The first sealing member 32 is arranged on the side of the auxiliary plate 31 away from the support surface 201. The first sealing member 32 is used to abut against the edge of the shell to be tested. In this way, when the edge of the shell to be tested is clamped by the clamping assembly 4, the edge of the shell to be tested is sealed due to the contact with the first sealing member 32, avoiding air leakage at the edge of the shell during the subsequent air tightness test, and ensuring the accuracy of the experiment.

[0047] It should be understood that the shape of the vertical plate portion 312 is similar to the shape of the inner wall surface of the shell to be tested. For example, when the inner contour of the shell to be tested is quadrangular, the shape of the vertical plate portion 312 is flat. When the inner wall surface of the shell to be tested is arc-shaped, the shape of the vertical plate portion 312 is correspondingly arranged as arc-shaped. Similarly, the shape of the bottom plate portion 311 is related to the shape of the edge of the shell to be tested. For example, when the shape of the edge of the shell to be tested is quadrangular, the shape of the bottom plate portion 311 is also quadrangular. When the shape of the edge of the shell to be tested is hexagonal, the shape of the bottom plate portion 311 is correspondingly hexagonal.

[0048] In some embodiments, as shown in Figure 4 The bottom plate portion 311 is provided with a gas passage hole 301. The gas passage hole 301 is used to introduce gas into the shell to be tested. That is, under the action of the auxiliary assembly 3 and the plurality of clamping assemblies 4, it can be ensured that the gas does not leak through the edge of the shell during the air tightness test of the shell to be tested. The gas can only pass into the shell through the gas passage hole 301. Therefore, the air tightness of the shell to be tested can be known by observing the internal air pressure of the shell to be tested.

[0049] In some embodiments, as shown in Figure 1 and Figure 5As shown, multiple clamping components 4 surround the periphery of the base plate portion 311 to press against the edge of the housing to be tested when the multiple clamping components 4 are in the locking turntable, and to constrain the movement of the housing to be tested in a direction perpendicular to the support surface 201, that is, movement in the Z direction as shown in the figure. The clamping components 4 include a support block 41 and a clamping member 42. The clamping member 42 is disposed on the support block 41, and the support block 41 has a limiting step 401 for abutting against the housing to be tested. The limiting step 401 is used to restrict the movement of the housing to be tested on the horizontal plane.

[0050] In some embodiments, such as Figure 1 and Figure 5 As shown, the support block 41 includes a first support block 411 and a second support block 412 connected to each other. The first support block 411 has a limiting step 401 on the side facing the base plate 311, and the first support block 411 is provided with a clamping member 42. The second support block 412 is connected to the support body 2. In this embodiment, the first support block 411 is provided with a spring pin 4111 for limiting the edge of the shell to be tested. The second support block 41 includes a first support part 4121 and a second support part 4122 connected to each other. The first support part 4121 and the second support part 4122 are arranged at an included angle. The first support part 4121 is provided with a clamping member 42 along a first direction (e.g., Figure 1 and Figure 2 The first adjustment groove 41211, which extends in the direction Z shown in the figure, is provided in the first direction (i.e., as shown in the figure). Figure 1 and Figure 2 The direction Z shown is perpendicular to the support surface 201. Thus, the position of the first support block 411 connected to the first support part 4121 can be adjusted by the first adjustment groove 41211 to facilitate adjustment of the edge of the housing to be tested.

[0051] Furthermore, such as Figure 5 As shown, the second support part 4122 is provided with a second adjustment groove 41221. The second adjustment groove 41221 is configured to extend along a second direction. The first direction is perpendicular to the second direction (direction X shown in the figure). In this way, the position to be connected to the support platform 21 can be selected through the second adjustment groove 41221, which facilitates user operation.

[0052] Understandably, the shapes of the first adjustment groove 41211 and the second adjustment groove 41221 are not limited. They can be elongated holes or other shapes, such as S-shaped or V-shaped. The specific shape can be set according to the needs.

[0053] In some embodiments, such as Figure 5As shown, the clamping member 42 comprises a telescopic cylinder 421, a movable arm 422 hinged to the telescopic end of the telescopic cylinder 421, and a connecting rod 423 having two ends connected to the movable arm 422 and the cylinder body of the telescopic cylinder 421 respectively. When the telescopic end of the telescopic cylinder 421 extends, the movable arm 422 rotates relative to the telescopic end of the telescopic cylinder 421 to a locking position, and the movable arm 422 abuts against the edge of the shell to be tested to be in a locked state; when the telescopic end of the telescopic cylinder 421 retracts, the movable arm 422 rotates relative to the telescopic end of the telescopic cylinder 421 to an unlocking position, and the clamping member 42 is in an unlocked state. In this way, when the shell to be tested is quickly positioned to the position to be clamped by the auxiliary plate 31, the telescopic end of the telescopic cylinder 421 is controlled to extend, and the movable arm 422 will be unfolded relative to the cylinder body of the telescopic cylinder 421 under the action of the telescopic end, and the movable arm 422 abuts against the edge of the shell to be tested.

[0054] The telescopic cylinder 421 can be a pneumatic cylinder, a hydraulic cylinder, or of course other types, as long as it can drive the movable arm 422 to move.

[0055] It can be understood that the distribution mode of the plurality of clamping members 42 surrounding the periphery of the auxiliary plate 31 is specifically set according to the shape of the auxiliary plate 31, for example, as shown in Figure 6 As shown in Figure 7 If the bottom plate part 311 of the auxiliary plate 31 has an octagonal shape, the plurality of clamping members 42 should also be distributed in an octagonal distribution mode.

[0056] Through the joint action of the plurality of clamping members 42 surrounding the periphery of the shell to be tested, the edge of the shell to be tested can be clamped on the auxiliary plate 31, facilitating the subsequent airtightness test of the shell to be tested.

[0057] In some embodiments, as shown in Figure 1 The airtightness test tool 1 further comprises a lateral sealing assembly 5 connected to the support main body 2 and a second sealing member 6 arranged on the side wall of the shell to be tested for abutting against the vertical plate part 312, and the lateral sealing assembly 5 is used to abut against the second sealing member 6. In this embodiment, the lateral sealing assembly 5 comprises a bracket 51 and a lateral cylinder, one end of the bracket 51 is connected to the support main body 2, the other end of the bracket 51 is connected to the lateral cylinder, and the telescopic end of the lateral cylinder faces the second sealing member 6. In this way, when the lateral surface of the shell to be tested needs to be sealed, the lateral sealing assembly 5 and the second sealing member 6 can be used to seal the lateral surface of the shell to be tested, thereby reducing the risk of air leakage from the lateral surface of the shell to be tested during the airtightness test.

[0058] The shell airtightness test tool 1 provided by the embodiment of the application comprises a support main body 2, an auxiliary assembly 3 and a plurality of clamping assemblies 4, the support main body 2 is provided with a support surface 201; the auxiliary assembly 3 comprises an auxiliary plate 31 and a first sealing element 32, the auxiliary plate 31 comprises a bottom plate part 311 and a vertical plate part 312 connected with each other, the bottom plate part 311 abuts against the support surface 201, the vertical plate part 312 is vertically arranged relative to the bottom plate part 311, the first sealing element 32 is arranged on a side of the auxiliary plate 31 away from the support surface 201, the vertical plate part 312 is used for abutting against an inner wall surface of the shell to be tested, and the first sealing element 32 is used for abutting against an edge of the shell to be tested; the plurality of clamping assemblies 4 are arranged on the support main body 2 and surround a periphery of the bottom plate part 311, each clamping assembly 4 comprises a support block 41 and a clamping element 42, the support block 41 is provided with a limiting step 401 used for abutting against the shell to be tested, and the clamping element 42 is arranged on the support block 41, and the clamping element 42 is configured to abut against and press the edge of the shell to be tested when in a locking state and to constrain the shell to be tested from moving in a direction perpendicular to the support surface 201. In this way, the shell edge can be clamped and sealed by using the test tool 1, that is, the airtightness test tool 1 can play the role of a clamp, the risk of edge lifting is reduced, the airtightness detection can be facilitated when the gas is introduced into the shell, and the test tool 1 is convenient to use.

[0059] The airtightness test system provided by another embodiment of the application comprises the airtightness test tool 1 in the above embodiment.

[0060] The above description is merely an embodiment of the application and does not limit the patent range of the application, and any equivalent structure or equivalent process conversion or direct or indirect application in other related technical fields by using the content of the application specification and drawings is also included in the patent protection range of the application.

Claims

1. A fixture for testing the airtightness of a housing, characterized in that, include: The main support structure is equipped with a support surface; An auxiliary component includes an auxiliary plate and a first seal. The auxiliary plate includes a bottom plate portion and a vertical plate portion connected to each other. The bottom plate portion abuts against the support surface. The vertical plate portion is arranged perpendicularly to the bottom plate portion. The first seal is disposed on the side of the auxiliary plate away from the support surface. The vertical plate portion is used to abut against the inner wall surface of the housing to be tested. The first seal is used to abut against the edge of the housing to be tested. Multiple clamping components are disposed on the support body and surround the periphery of the base plate. Each clamping component includes a support block and a clamping member. The support block is provided with a limiting step for abutting against the housing to be tested. The clamping member is disposed on the support block and is configured to press against the edge of the housing to be tested when in a locked state, and to constrain the housing to be tested to move in a direction perpendicular to the support surface.

2. The airtightness testing fixture according to claim 1, characterized in that, The clamping component includes a telescopic cylinder, a movable arm, and a connecting rod. The movable arm is hinged to the telescopic end of the telescopic cylinder, and the two ends of the connecting rod are respectively connected to the movable arm and the cylinder body of the telescopic cylinder. When the telescopic cylinder extends, the movable arm rotates relative to the telescopic cylinder to the locked position, and the movable arm presses against the edge of the housing to be tested to be in the locked state. When the telescopic cylinder retracts, the movable arm rotates to the unlocked position relative to the telescopic cylinder.

3. The airtightness testing fixture according to claim 1, characterized in that, The support block includes a first support block and a second support block connected to each other. The first support block has the limiting step on the side facing the base plate and the clamping member. The second support block is connected to the support body.

4. The airtightness testing fixture according to claim 3, characterized in that, The second support block includes a first support portion and a second support portion connected to each other. The first support portion and the second support portion are arranged at an included angle. The first support portion is provided with a first adjustment groove extending along a first direction, which is perpendicular to the support surface.

5. The airtightness testing fixture according to claim 4, characterized in that, The second support portion is provided with a second adjustment groove, which is configured to extend along a second direction, wherein the first direction is perpendicular to the second direction.

6. The airtightness testing fixture according to any one of claims 1-5, characterized in that, It also includes a lateral sealing assembly and a second seal, the lateral sealing assembly being connected to the support body, the second seal being disposed on a side wall of the housing to be tested for contact with the upright plate, and the lateral sealing assembly being used to press against the second seal.

7. The airtightness testing fixture according to claim 6, characterized in that, The lateral sealing assembly includes a bracket and a lateral cylinder. One end of the bracket is connected to the support body, and the other end of the bracket is connected to the lateral cylinder. The telescopic end of the lateral cylinder faces the second seal.

8. The airtightness testing fixture according to claim 1, characterized in that, The supporting body includes a supporting platform and multiple supporting members. One end of each of the multiple supporting members is connected to the supporting platform, and the other end of each of the multiple supporting members is used to abut against the base plate. The multiple supporting members are distributed in a polygonal pattern on the supporting platform, and the side of each of the multiple supporting members away from the supporting platform together forms the supporting surface.

9. The airtightness testing fixture according to claim 8, characterized in that, The support member is an L-shaped corner bracket.

10. An airtightness testing system, characterized in that, Includes the airtightness testing fixture as described in any one of claims 1-9.

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