Cylindrical lithium battery detection fixing tool

Abstract

The utility model relates to the technical field of battery detection, in particular to a cylindrical lithium battery detection fixing tool which comprises a lower sleeve piece and an upper sleeve piece, one end of each of the lower sleeve piece and the upper sleeve piece is open, a cavity for placing a battery is formed inside the lower sleeve piece and the upper sleeve piece, and the other end of the lower sleeve piece is connected with an air inlet end; and the at least two positioning pieces are detachably arranged in the cavity. The positioning pieces are arranged in the lower sleeve piece and the upper sleeve piece, after the battery is placed in the sleeve pieces, the top end and the bottom end of the battery are corrected by the positioning pieces respectively, it is ensured that a liquid injection hole in the bottom end of the battery is aligned with the air inlet end, and the upper sleeve piece and the lower sleeve piece are driven by the driving structure to be close to each other; therefore, the two positioning pieces clamp the top end and the bottom end of the battery, the gas source is opened, and gas is injected into the liquid injection hole in the bottom of the battery through the gas inlet end, so that the airtightness of the battery can be detected, and the batteries of different specifications can be positioned by replacing the positioning pieces of different specifications.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery detection technical field especially relates to a cylindrical lithium battery detection fixed frock. BACKGROUND

[0002] We all know that the battery needs to check its airtightness when producing, this is mainly because the airtightness of the battery determines its electrical performance and safety, for cylindrical lithium battery, the bottom center or side of the shell is provided with a liquid injection hole for injecting electrolyte, and the airtightness detection is mainly through injecting constant pressure gas into the liquid injection hole to judge the airtightness of the battery.

[0003] The existing battery airtightness detection frock mainly includes: a sleeve with a cavity consistent with the shape of the battery, the sleeve is open at one end and detachably connected with a cover, the cover is connected with an air inlet pipe, the air inlet pipe is communicated with a pressure gauge and a gas source, in use, after the battery is inserted into the cavity of the sleeve, the cover is used to press against the bottom of the battery, to ensure that the liquid injection hole at the bottom of the battery is aligned with the air inlet pipe of the cover, the gas source and the air inlet pipe are used to fill the pressure gas into the liquid injection hole of the battery, and after the pressure gauge shows that the number reaches the detection threshold, the gas filling action is stopped, and whether the pressure gauge number changes is observed to determine whether the cylindrical battery core airtightness is qualified.

[0004] The existing technical problems are: the size of the cavity in the existing sleeve is fixed, each size of the sleeve corresponds to a fixed size of the battery, when different diameter or different height cylindrical batteries need to be detected, the sleeve must be re-made, resulting in that the adaptation range of the frock is small. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model aims at providing a cylindrical lithium battery detection fixed frock to solve the technical problem that the existing cylindrical lithium battery detection frock cannot adapt to different specifications of batteries.

[0006] In order to achieve the above purpose, the utility model provides a cylindrical lithium battery detection fixed frock, which comprises:

[0007] The lower sleeve and the upper sleeve are open at one end, the inside of the lower sleeve and the upper sleeve forms a cavity for placing the battery, and the other end of the lower sleeve is connected with an air inlet end;

[0008] At least two positioning pieces are detachably arranged in the cavity, the positioning pieces are provided with limiting grooves matched with the shape and size of the battery to limit the top end and the bottom end of the battery respectively, the positioning piece in the lower sleeve is provided with a pumping hole at the bottom, and the air inlet end and the pumping hole form an air path for sending the gas into the liquid injection hole of the battery;

[0009] The driving structure is used to drive the lower sleeve and the upper sleeve to move close to each other or away from each other.

[0010] As the preferred technical scheme of the utility model, the depth of the chamber is less than the length of the battery, and the sum of the depths of the two limiting grooves is less than the length of the battery.

[0011] As the preferred technical scheme of the utility model, the tooling further comprises:

[0012] The first sealing gasket is arranged in the limiting groove of one of the positioning members, and a gas groove is formed in the surface of the first sealing gasket and is in communication with the inflation hole;

[0013] The second sealing gasket is arranged in the limiting groove of the other positioning member, and the second sealing gasket is provided with a first positioning hole matched with the protruding part at the top end of the battery.

[0014] As the preferred technical scheme of the utility model, the driving structure comprises:

[0015] The frame body is connected with the lower sleeve, and a first threaded groove is formed in the top end of the frame body;

[0016] The first threaded rod is threadedly connected with the first threaded groove at one end, and the other end of the first threaded rod is rotationally connected with the upper sleeve, and the upper sleeve can be moved towards the lower sleeve by rotating the first threaded rod.

[0017] As the preferred technical scheme of the utility model, one end of the air inlet end is connected with a pressure gauge and an electromagnetic valve.

[0018] As the preferred technical scheme of the utility model, the air inlet end penetrates through a through groove formed in the bottom of the frame body.

[0019] As the preferred technical scheme of the utility model, the driving structure further comprises a guide rod connected with the upper sleeve at one end, and the guide rod is slidingly matched with a guide groove formed in the top end of the frame body.

[0020] As the preferred technical scheme of the utility model, the lower sleeve and the upper sleeve are provided with a fixing structure for fixing the positioning member.

[0021] As the preferred technical scheme of the utility model, the fixing structure comprises a second threaded rod, the second threaded rod is threadedly connected with a second threaded groove formed in the surface of the lower sleeve and the upper sleeve, the other end of the second threaded rod is formed into a smooth cylindrical end, and the cylindrical end is clamped in a positioning groove formed in the surface of the positioning member.

[0022] As the preferred technical scheme of the utility model, the bottom of the frame body is provided with a mounting hole for connecting a bolt.

[0023] The beneficial effects of the present invention are as follows: the present invention is provided with positioning parts in both the lower kit and the upper kit; when the battery is placed in the kit, the top and bottom ends of the battery are respectively corrected by the positioning parts to ensure that the liquid injection hole at the bottom end of the battery is aligned with the air inlet end; the upper and lower kits are driven close to each other by the driving structure, so that the two positioning parts clamp the top and bottom ends of the battery; the air source is turned on, and gas is injected into the liquid injection hole at the bottom of the battery through the air inlet end, so that the air tightness of the battery can be tested; therefore, batteries of different specifications can be positioned by replacing positioning parts of different specifications, and the scope of application of the tooling is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the external three-dimensional structure of the utility model;

[0026] Figure 2 This is a schematic diagram of a partially cutaway three-dimensional structure of the present utility model;

[0027] Figure 3 For the utility model Figure 2 A in the middle is an enlarged structural diagram;

[0028] Figure 4 It is a schematic diagram of the half-section three-dimensional structure of the positioning member, the first sealing gasket and the second sealing gasket of the present invention.

[0029] The markings in the figure are: 1. frame; 2. lower kit; 3. upper kit; 4. first threaded rod; 5. first threaded groove; 6. through groove; 7. air inlet end; 8. pressure gauge; 9. solenoid valve; 10. positioning piece; 11. positioning groove; 12. air hole; 13. first sealing gasket; 14. air groove; 15. second sealing gasket; 16. first positioning hole; 17. second threaded rod; 18. second threaded groove; 19. second positioning hole; 20. guide rod; 21. guide groove. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0031] It should be noted that, unless otherwise defined, technical or scientific terms used in the present application should be understood as their common meanings to those skilled in the art to which the present application belongs. The terms "first", "second" and similar words used in the present application do not represent any order, number or importance, but are only used to distinguish different components. The terms "including", "containing" and similar words mean that the elements or objects before the words cover the elements or objects listed after the words and their equivalents, without excluding other elements or objects. The terms "connected" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationships, which may change accordingly when the absolute position of the described object changes.

[0032] As shown in Figure 1 and Figure 2 , a cylindrical lithium battery detection fixing tool, comprising:

[0033] An open-ended lower sleeve 2 and an upper sleeve 3, the interior of the lower sleeve 2 and the upper sleeve 3 forms a cavity for placing the battery, the other end of the lower sleeve 2 is connected with an air inlet end 7;

[0034] At least two positioning members 10 are detachably arranged in the cavity, the positioning member 10 is provided with a limiting groove matched with the shape and size of the battery to limit the top end and the bottom end of the battery respectively, the positioning member 10 located in the lower sleeve 2 is provided with a pumping hole 12 at the bottom, and the air inlet end 7 and the pumping hole 12 form an air path for sending gas into the battery liquid injection hole;

[0035] A driving structure for driving the lower sleeve 2 and the upper sleeve 3 to approach or move away from each other;

[0036] The above technical solution can adapt to the detection needs of batteries of different specifications. In use, according to the battery to be detected, select the corresponding specification of the positioning member 10, and place the positioning member 10 in the cavity inside the lower sleeve 2 and the upper sleeve 3 respectively, insert the bottom end of the battery into the lower sleeve 2, and ensure that the liquid injection hole at the bottom end of the battery is aligned with the pumping hole 12 of the positioning member 10. The driving structure drives the lower sleeve 2 and the upper sleeve 3 to approach each other, thereby synchronously driving the upper and lower positioning members 10 to clamp the top end and the bottom end of the battery, forming a stable fixation. Open the gas source, inject gas into the liquid injection hole at the bottom of the battery through the air inlet end 7, and the air tightness of the battery can be detected. For cylindrical lithium batteries of different diameters and heights, the positioning and fixing can be realized by replacing the positioning members 10 of different specifications, that is, by replacing the accessories, the batteries of various sizes can be fixed, without replacing the entire sleeve, and the application range of the tool is wider.

[0037] Furthermore, in this embodiment, the depth of the chamber is less than the length of the battery, and the sum of the depths of the two limiting grooves is less than the length of the battery;

[0038] The above technical solution can ensure that the positioning member 10 can apply pressure to the top and bottom ends of the battery. When the length of the chamber of the lower kit 2 and the upper kit 3 is greater than the battery, even if the lower kit 2 and the upper kit 3 are combined, the battery will move in the chamber. Similarly, the depth of the limiting groove of the positioning member 10 must also be less than the length of the battery to avoid the battery from moving due to air pressure during the detection process, resulting in a gap between the battery's liquid filling hole and the air inlet end 7, and preventing gas from leaking from the gap and affecting the accuracy of the detection.

[0039] like Figure 4 As shown, in this embodiment, the tooling further includes: a first sealing gasket 13 disposed in the limiting groove of one of the positioning members 10, the surface of the first sealing gasket 13 being provided with an air groove 14 communicating with the air hole 12; a second sealing gasket 15 disposed in the limiting groove of the other positioning member 10, the second sealing gasket 15 being provided with a first positioning hole 16 adapted to the protruding portion at the top of the battery;

[0040] The above technical solution can prevent the top and bottom ends of the battery from being compressed and deformed. Generally speaking, the upper and lower end faces of cylindrical lithium batteries are different shapes. Therefore, in order to better adapt to the upper and lower ends of the battery, a sealing gasket is provided. On the one hand, it reduces the deformation of the battery when it is under pressure and prevents the battery from being deformed during testing. On the other hand, it improves the airtightness of the tooling.

[0041] like Figure 2 As shown, in this embodiment, the driving structure includes: a frame body 1 connected to the lower set 2, and a first threaded groove 5 is provided at the top of the frame body 1; a first threaded rod 4 threadedly connected to the first threaded groove 5 at one end, and the other end of the first threaded rod 4 is rotatably connected to the upper set 3, and the upper set 3 can be driven to move toward the lower set 2 by rotating the first threaded rod 4; an air inlet end 7 passes through a through groove 6 provided at the bottom of the frame body 1; a guide rod 20 connected to the upper set 3 at one end, and the guide rod 20 is slidably engaged with a guide groove 21 provided at the top of the frame body 1;

[0042] The above technical solution can drive the upper kit 3 to move toward the lower kit 2, thereby clamping the battery. When in use, the first threaded rod 4 is rotated to move it downward along the first threaded groove 5, thereby driving the upper kit 3 to move downward, thereby driving the upper kit 3 and the lower kit 2 to move closer. By setting the guide rod 20, the upper kit 3 can be guided to move downward stably, preventing the upper kit 3 from rotating when the first threaded rod 4 rotates.

[0043] like Figure 1 As shown, in this embodiment, one end of the air inlet end 7 is connected to a pressure gauge 8 and a solenoid valve 9;

[0044] The above technical scheme can detect the air tightness, open the electromagnetic valve 9, the gas source fills the pressure gas into the liquid injection hole of the battery through the air inlet end 7, stops the air filling action after the pressure gauge 8 shows the number reaches the detection threshold, and whether the number of the pressure gauge 8 changes can judge whether the air tightness of the cylindrical battery is qualified.

[0045] As shown in Figure 2 and Figure 3 In the embodiment, the lower sleeve 2 and the upper sleeve 3 are provided with a fixing structure for fixing the positioning member 10; specifically, the fixing structure comprises a second threaded rod 17, the second threaded rod 17 is threadedly connected with a second threaded groove 18 opened on the surface of the lower sleeve 2 and the upper sleeve 3, and the other end of the second threaded rod 17 forms a smooth cylindrical end, which is clamped with a positioning groove 11 opened on the surface of the positioning member 10.

[0046] The above technical scheme can conveniently install and fix the positioning member 10, in order to prevent the positioning member 10 from falling from the cavity of the lower sleeve 2 and the upper sleeve 3, after the positioning member 10 is put into the cavity, the second threaded rod 17 is rotated to drive the cylindrical end to be inserted into the positioning groove 11 on the surface of the positioning member 10, so that the positioning member 10 is fixed in the sleeve.

[0047] As shown in Figure 1 and Figure 2 In the embodiment, the bottom of the frame body 1 is provided with a mounting hole for connecting a bolt.

[0048] The above technical scheme can conveniently detachably fix the frame body 1 on the mounting surface.

[0049] Working principle: according to the battery to be detected, the corresponding specification positioning member 10 is selected, the positioning member 10 is respectively put into the cavities in the lower sleeve 2 and the upper sleeve 3, the second threaded rod 17 is rotated to drive the cylindrical end to be inserted into the positioning groove 11 on the surface of the positioning member 10, so that the positioning member 10 is fixed in the sleeve, the bottom end of the battery is inserted into the lower sleeve 2, and it is ensured that the liquid injection hole at the bottom end of the battery is aligned with the inflating hole 12 of the positioning member 10, the first threaded rod 4 is rotated to move downward along the first threaded groove 5, so as to drive the upper sleeve 3 to move downward, so as to drive the upper sleeve 3 to approach the lower sleeve 2, so as to synchronously drive the upper and lower positioning members 10 to clamp the top end and the bottom end of the battery, form stable fixation, open the electromagnetic valve 9, the gas source fills the pressure gas into the liquid injection hole of the battery through the air inlet end 7, stops the air filling action after the pressure gauge 8 shows the number reaches the detection threshold, and whether the number of the pressure gauge 8 changes can judge whether the air tightness of the cylindrical battery is qualified.

[0050] Those skilled in the art will understand that the above discussion of any of the embodiments is merely exemplary in nature and is not intended to imply that the scope of the present application, including the claims, is limited to these examples; the above embodiments or technical features among different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in details for the sake of brevity.

[0051] The present application is intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any and all such alternatives, modifications and variations are intended to be encompassed by the appended claims.

Claims

1. A cylindrical lithium battery testing fixture, characterized in that: include: A lower assembly (2) and an upper assembly (3) with one end open, wherein the interiors of the lower assembly (2) and the upper assembly (3) form a chamber for placing batteries, and the other end of the lower assembly (2) is connected to an air inlet (7); At least two positioning members (10) are detachably arranged in the chamber, the positioning members (10) are provided with limiting grooves adapted to the shape and size of the battery to limit the top and bottom ends of the battery respectively, the positioning member (10) located in the lower assembly (2) is provided with an air hole (12) at its bottom, and the air inlet end (7) and the air hole (12) form an air path for delivering gas into the battery injection hole; A driving structure for driving the lower kit (2) and the upper kit (3) to move closer to or away from each other.

2. The cylindrical lithium battery detection fixture according to claim 1, characterized in that: The depth of the cavity is less than the length of the battery, and the sum of the depths of the two limiting grooves is less than the length of the battery.

3. The cylindrical lithium battery detection fixture according to claim 2, characterized in that: The tooling also includes: A first sealing gasket (13) is arranged in the limiting groove of one of the positioning members (10), wherein the surface of the first sealing gasket (13) is provided with an air groove (14) connected to the air hole (12); A second sealing gasket (15) is arranged in the limiting groove of another positioning member (10), and the second sealing gasket (15) is provided with a first positioning hole (16) adapted to the raised portion at the top of the battery.

4. The cylindrical lithium battery detection fixture according to claim 2 or 3, characterized in that: The driving structure includes: A frame body (1) connected to the lower set (2), wherein a first thread groove (5) is provided at the top end of the frame body (1); A first threaded rod (4) having one end threadedly connected to the first threaded groove (5), and the other end of the first threaded rod (4) being rotatably connected to the upper sleeve (3), can drive the upper sleeve (3) to move toward the lower sleeve (2) by rotating the first threaded rod (4).

5. The cylindrical lithium battery detection fixture according to claim 4, characterized in that: One end of the air inlet end (7) is connected to a pressure gauge (8) and a solenoid valve (9).

6. The cylindrical lithium battery testing fixture according to claim 5, characterized in that: The air inlet end (7) passes through a through slot (6) provided at the bottom of the frame (1).

7. The cylindrical lithium battery testing fixture according to claim 4, characterized in that: The driving structure further comprises: a guide rod (20) having one end connected to the upper sleeve (3); the guide rod (20) is in sliding engagement with a guide groove (21) provided at the top end of the frame (1).

8. The cylindrical lithium battery testing fixture according to claim 1, characterized in that: The lower kit (2) and the upper kit (3) are provided with a fixing structure for fixing the positioning member (10).

9. The cylindrical lithium battery testing fixture according to claim 8, characterized in that: The fixing structure includes a second threaded rod (17), the second threaded rod (17) being threadedly connected to a second threaded groove (18) provided on the surface of the lower set (2) and the upper set (3), and the other end of the second threaded rod (17) forming a smooth cylindrical end, the cylindrical end being engaged with a positioning groove (11) provided on the surface of the positioning member (10).

10. The cylindrical lithium battery testing fixture according to claim 7, characterized in that: The bottom of the frame (1) is provided with mounting holes for connecting bolts.

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