Battery airtightness testing device

Abstract

The utility model provides a battery air tightness testing device, which comprises a base, a fixing plate arranged on one side of the top of the base, an air inflation empty needle arranged on the side wall of the fixing plate and used for inflating a battery, an air inflation pipe communicated with the air inflation empty needle in a sealing manner is arranged on the fixing plate, and a pressure gauge is arranged on the air inflation pipe; a vertical plate is arranged on the other side of the top of the base, a first electric push rod is arranged on the side wall of the vertical plate, a clamping plate arranged between the fixing plate and the vertical plate is arranged on a telescopic shaft of the first electric push rod, a pair of extending blocks symmetrically extend on the two opposite side walls of the clamping plate, and limiting columns penetrating through the side wall of the vertical plate are arranged on the side walls of the pair of extending blocks in a penetrating mode; a stop groove is transversely formed in the top of the limiting column, a stop block inserted into the stop groove is arranged in the extending block, a pressing assembly used for pushing the stop block to be attached to the stop groove to stop the limiting column is arranged at the top of the extending block, and the anti-pinch device is reasonable in structure, good in anti-pinch effect and good in anti-inclination effect.

Description

Technical Field

[0001] The utility model relates to a battery air tightness testing device, in particular to a battery air tightness testing device. Background Art

[0002] Lithium batteries are widely used in mobile phones, laptops and other fields due to their high energy density, multiple recycling, long life and low pollution. The chemical properties of lithium metal in the battery are extremely active. In order to prevent lithium metal from reacting with air, high requirements are placed on the air tightness of lithium batteries. Therefore, during the production process of lithium batteries, a battery air tightness testing device is needed to test its air tightness. Generally, the produced batteries are extracted, holes are punched in the batteries (called battery holes, with a fixed diameter of 4mm), and nitrogen is filled into the batteries through the holes. A pressure gauge is connected to the nitrogen filling pipe. When the battery is inflated, as the pressure rises, there will be a disconnection sound inside the battery. The pressure value of the pressure gauge at this time is the actual disconnection pressure. If the pressure value is between 1.0 and 1.2MPa, and then the pressure is maintained at 1.4MPa for 2 minutes, it indicates that the battery is leaking and of qualified quality, so as to ensure the safety performance of the lithium battery and avoid lithium battery failure or even explosion due to electrolyte reaction.

[0003] In the prior art, existing battery air tightness test devices require the battery to be clamped during use, which can easily damage the battery during clamping, thereby affecting the accuracy of the battery test. Moreover, when the battery is clamped, the bottom of the battery lacks support, causing the battery to tilt when connected to the inflation needle, making it difficult to accurately connect and clamp the battery and the inflation needle, resulting in poor performance. There is an urgent need for a battery air tightness test device to solve the above problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a battery air tightness testing device to solve the problems raised in the above background technology. The utility model has a reasonable structure, good anti-pinching effect and good anti-tilting effect.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions: a battery air tightness testing device, comprising:

[0006] The base has a fixed plate on one side of the top of the base, an inflation needle for inflating the battery is provided on the side wall of the fixed plate, an inflation tube sealed and connected to the inflation needle is provided on the fixed plate, and a pressure gauge is provided on the inflation tube;

[0007] A vertical plate is provided on the other side of the top of the base, and a first electric push rod is provided on the side wall of the vertical plate. A splint placed between the fixed plate and the vertical plate is provided on the telescopic axis of the first electric push rod, and a pair of extension blocks are symmetrically extended on the two opposite side walls of the splint. The side walls of the pair of extension blocks are penetrated by a limit column passing through the side wall of the vertical plate, and a stop groove is horizontally provided on the top of the limit column, and a stop block inserted into the stop groove is provided inside the extension block. A pressing component for pushing the stop block to fit into the stop groove to stop the limit column is provided on the top of the extension block.

[0008] Furthermore, the pressing assembly includes a threaded column arranged at the top of the extension block and connected to the stop block, a rotating disk is provided on the top of the threaded column, a bearing is provided at the connection between the threaded column and the stop block, and a guide groove matching the stop block is opened inside the extension block.

[0009] Furthermore, a through hole matching the limiting column is formed on the side wall of the extension block, the guide groove is connected to the through hole, a threaded hole connecting to the guide groove is formed on the top of the extension block, and the threaded column matches the threaded hole.

[0010] Furthermore, a second electric push rod is provided inside the base, and a support plate for supporting the battery at the empty inflation needle is provided on the telescopic shaft of the second electric push rod.

[0011] Furthermore, the lateral length of the support plate is smaller than the lateral length of the battery.

[0012] Furthermore, a first scale line is provided on the side wall of the limiting column, and a second scale line is provided on a side of the fixing plate close to the supporting plate.

[0013] Furthermore, a storage slot matching the support plate is provided on the top of the base.

[0014] According to a battery air tightness testing device of the utility model, the first electric push rod is operated to drive the clamping plate to move to a suitable position on the side close to the fixed plate, thereby clamping the battery connected to the inflatable hollow needle, and then a force is applied to the limit column to make the limit column move laterally along the clamping plate, so that the end of the limit column is fitted with the fixed plate, and then a pressing assembly is used to push the stop block to fit the stop groove of the limit column, thereby stopping the limit column and preventing the limit column from moving. When the battery needs to be clamped again laterally, under the action of the limit column limiting the clamping plate, the phenomenon of the first electric push rod pushing the clamping plate to cause damage to the battery is avoided, thereby enhancing the anti-clamping effect;

[0015] By using the second electric push rod to drive the support plate to move upward to the appropriate position to support the battery connected to the inflatable hollow needle, when the support plate moves to the appropriate height, the battery can be placed on the top of the support plate and then pushed horizontally to connect the battery to the inflatable hollow needle, thereby supporting and positioning the battery to avoid tilting when the battery and the inflatable hollow needle are connected, so that the first electric push rod pushes the clamping plate to clamp the battery, which facilitates the precise connection and clamping between the battery and the inflatable hollow needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0017] Figure 1 1 is a perspective view of a battery air tightness testing device according to an embodiment of the present invention;

[0018] Figure 2 According to an embodiment of the present invention Figure 1 A magnified view of middle A;

[0019] Figure 3 This is a formal cross-sectional view of the connection between the extension block and the pressing assembly in a battery air tightness testing device according to one embodiment of the present invention;

[0020] In the figure: 1. Base; 2. Fixing plate; 3. Inflating tube; 4. Pressure gauge; 5. Inflating needle; 6. Clamp; 7. Extension block; 71. Through hole; 8. Vertical plate; 9. First electric push rod; 10. Limiting column; 101. Stop groove; 102. First scale line; 11. Storage slot; 12. Second electric push rod; 13. Support plate; 14. Second scale line; 15. Stop block; 16. Pressing assembly; 161. Threaded column; 162. Rotating disk; 163. Threaded hole; 164. Guide groove; 165. Bearing. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figure 1 As shown, the utility model provides a technical solution: a battery air tightness testing device, comprising:

[0023] Base 1, with a fixed plate 2 provided on one side of the top of the base 1, an inflation needle 5 for inflating the battery provided on the side wall of the fixed plate 2, an inflation tube 3 provided on the fixed plate 2 and in sealed communication with the inflation needle 5, and a pressure gauge 4 provided on the inflation tube 3;

[0024] A vertical plate 8 is provided on the other side of the top of the base 1, and a first electric push rod 9 is provided on the side wall of the vertical plate 8. A splint 6 placed between the fixed plate 2 and the vertical plate 8 is provided on the telescopic axis of the first electric push rod 9. A pair of extension blocks 7 are symmetrically extended on the opposite side walls of the splint 6. The side walls of the pair of extension blocks 7 are penetrated by a limiting column 10 that passes through the side wall of the vertical plate 8. A stop groove 101 is horizontally opened on the top of the limiting column 10, and a stop block 15 inserted into the stop groove 101 is provided inside the extension block 7. A pressing component 16 for pushing the stop block 15 to fit into the stop groove 101 to stop the limit column 10 is provided on the top of the extension block 7. This design drives the splint 6 to move to the appropriate position close to the fixed plate 2 by the first electric push rod 9, thereby clamping the battery connected to the inflatable empty needle 5. Then, force is applied to the limit column 10 to make the limit column 10 move laterally along the splint 6 so that the end of the limit column 10 is fitted with the fixed plate 2, and then the pressing assembly 16 is used to push the stop block 15 to fit into the stop groove 101 of the limit column 10, thereby stopping the limit column 10 to prevent the limit column 10 from moving. When the battery needs to be clamped again later, the limit column 10 limits the splint 6, thereby avoiding the phenomenon that the first electric push rod 9 pushes the splint 6 to clamp the battery, thereby enhancing the anti-pinching effect. Under the action of a pair of limit columns 10, the splint 6 and the vertical plate 8 are penetrated, thereby guiding the splint 6 and improving the stability of the lateral movement of the splint 6. Among them, the lower side of the inner wall of the stop groove 101 can be provided with an anti-slip coating to improve the stability of the connection between the stop block 15 and the limit column 10.

[0025] Reference Figure 1 and Figure 2 The pressing assembly 16 includes a threaded column 161 arranged at the top of the extension block 7 and connected to the stop block 15. A rotating disk 162 is provided on the top of the threaded column 161. A bearing 165 is provided at the connection between the threaded column 161 and the stop block 15. A guide groove 164 matching the stop block 15 is opened inside the extension block 7. This design drives the threaded column 161 to move by applying force to the rotating disk 162 in the pressing assembly 16, thereby pushing the stop block 15 to move downward along the guide groove 164 and fit into the stop groove 101, thereby stopping the limit column 10 and preventing the limit column 10 from moving. The pressing assembly 16 can be replaced with a cylinder, a hydraulic cylinder or an electric push rod. It only needs to connect its telescopic shaft to the stop block 15 to drive the stop block 15 to move up and down and connect with the stop groove 101.

[0026] Reference Figure 2 and Figure 3 The side wall of the extension block 7 is provided with a through hole 71 that matches the limiting column 10, the guide groove 164 is connected to the through hole 71, and the top of the extension block 7 is provided with a threaded hole 163 that is connected to the guide groove 164, and the threaded column 161 matches the threaded hole 163, which improves the rationality of the design.

[0027] Reference Figure 1 A second electric push rod 12 is provided inside the base 1, and a support plate 13 for supporting the battery at the inflatable hollow needle 5 is provided on the telescopic shaft of the second electric push rod 12. This design drives the support plate 13 to move upward to a suitable position to support the battery connected to the inflatable hollow needle 5 by using the second electric push rod 12. When the support plate 13 moves to a suitable height, the battery can be placed on the top of the support plate 13 and then pushed horizontally to connect the battery with the inflatable hollow needle 5, thereby playing a role in supporting and positioning the battery, avoiding the tilting phenomenon when the battery and the inflatable hollow needle 5 are connected, so that the first electric push rod 9 pushes the clamping plate 6 to clamp the battery, which facilitates the precise connection and clamping between the battery and the inflatable hollow needle 5. The horizontal length of the support plate 13 is smaller than the horizontal length of the battery. This design facilitates the clamping plate 6 to clamp the battery, avoiding interference between the clamping plate 6 and the support plate 13.

[0028] Reference Figure 1 and Figure 2 A first scale line 102 is provided on the side wall of the limit column 10, and a second scale line 14 is provided on the side of the fixed plate 2 close to the support plate 13. This design facilitates the synchronous adjustment of a pair of limit columns 10 to make their extended lengths consistent by using the first scale line 102, and facilitates the observation and adjustment of the height of the support plate 13 by using the second scale line 14. A storage groove 11 matching the support plate 13 is provided on the top of the base 1, and this design facilitates the support plate 13 to be stored inside the storage groove 11.

[0029] Reference Figure 1-Figure 3 As an embodiment of the present invention: when it is necessary to perform an airtightness test on the battery, the staff drives the support plate 13 to move upward to a suitable position to support the battery connected to the inflation needle 5 by operating the second electric push rod 12. When the support plate 13 moves to a suitable height, the battery can be placed on the top of the support plate 13 and then horizontally pushed to connect the battery to the inflation needle 5, thereby supporting and positioning the battery to avoid tilting when the battery and the inflation needle 5 are connected. The first electric push rod 9 pushes the clamping plate 6 to clamp the battery, which facilitates the precise connection and clamping between the battery and the inflation needle 5. Then, nitrogen is filled into the battery through the inflation tube 3 through the inflation needle 5. The pressure gauge 4 will display the pressure inside the battery. When the battery is inflated, as the pressure rises, there will be a disconnection sound inside the battery. The pressure value displayed by the pressure gauge 4 at this time is the actual disconnection pressure. If the pressure value is between 1.0 and 1.2 MPa, and then the pressure is maintained at 1.4 MPa for 2 minutes, it indicates that the battery is leaking and of qualified quality.

[0030] When it is necessary to prevent the battery from being pinched, the first electric push rod 9 is operated to drive the splint 6 to move to the appropriate position close to the fixed plate 2, and the battery connected to the inflatable needle 5 is clamped. After clamping, force is applied to the limit column 10 to make the limit column 10 move laterally along the splint 6, so that the end of the limit column 10 is in contact with the fixed plate 2, and then the pressing assembly 16 is used to push the stop block 15 to fit the stop groove 101 of the limit column 10, thereby stopping the limit column 10 to prevent the limit column 10 from moving. When the battery needs to be clamped again laterally, the limit column 10 limits the splint 6, thereby avoiding the phenomenon that the first electric push rod 9 pushes the splint 6 to pinch the battery, thereby enhancing the anti-pinching effect and improving the practicality of the utility model.

[0031] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0032] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A battery air tightness testing device, comprising: A base (1), a fixing plate (2) is provided on one side of the top of the base (1), a side wall of the fixing plate (2) is provided with an inflation needle (5) for inflating the battery, an inflation tube (3) is provided on the fixing plate (2) and is in sealed communication with the inflation needle (5), and a pressure gauge (4) is provided on the inflation tube (3); It is characterized by: A vertical plate (8) is provided on the other side of the top of the base (1), and a first electric push rod (9) is provided on the side wall of the vertical plate (8). A clamping plate (6) is provided on the telescopic axis of the first electric push rod (9) and is placed between the fixed plate (2) and the vertical plate (8). A pair of extension blocks (7) are symmetrically extended on the opposite side walls of the clamping plate (6). A pair of side walls of the extension blocks (7) are both penetrated by a limiting column (10) passing through the side wall of the vertical plate (8). A stop groove (101) is horizontally provided on the top of the limiting column (10). A stop block (15) inserted into the stop groove (101) is provided inside the extension block (7). A pressing component (16) for pushing the stop block (15) to fit with the stop groove (101) to stop the limit column (10) is provided on the top of the extension block (7).

2. A battery air tightness testing device according to claim 1, characterized in that: The pressing assembly (16) comprises a threaded column (161) arranged at the top of the extension block (7) and connected to the stop block (15); a rotating disk (162) is provided at the top of the threaded column (161); a bearing (165) is provided at the connection between the threaded column (161) and the stop block (15); and a guide groove (164) matching the stop block (15) is provided inside the extension block (7).

3. A battery air tightness testing device according to claim 2, characterized in that: A through hole (71) matching the limiting column (10) is provided on the side wall of the extension block (7), the guide groove (164) is connected to the through hole (71), a threaded hole (163) connected to the guide groove (164) is provided on the top of the extension block (7), and the threaded column (161) matches the threaded hole (163).

4. A battery air tightness testing device according to claim 1, characterized in that: A second electric push rod (12) is provided inside the base (1), and a support plate (13) for supporting the battery at the inflation needle (5) is provided on the telescopic shaft of the second electric push rod (12).

5. A battery air tightness testing device according to claim 4, characterized in that: The lateral length of the support plate (13) is smaller than the lateral length of the battery.

6. A battery air tightness testing device according to claim 4, characterized in that: A first scale line (102) is provided on the side wall of the limiting column (10), and a second scale line (14) is provided on a side of the fixing plate (2) close to the supporting plate (13).

7. A battery air tightness testing device according to claim 4, characterized in that: A receiving groove (11) matching the supporting plate (13) is provided on the top of the base (1).

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