Pressing strip structure for welding battery top cover

Abstract

The utility model relates to a pressing strip structure for welding a battery top cover, and belongs to the technical field of secondary battery welding equipment. Comprising a pressing strip assembly, the pressing strip assembly comprises a pressing strip and a thermal protection strip which are connected with each other, the thermal protection strip covers the top of the pressing strip, a pressing face is arranged on one side of the pressing strip, and the pressing face is exposed out of the thermal protection strip; and the floating assembly comprises a guide plate, the guide plate is provided with a floating connecting piece connected with the pressing strip assembly, and the floating connecting piece enables the pressing strip assembly to move in a self-adaptive mode relative to the guide plate. The thermal protection strip is used for preventing sparks generated when the battery shell and the top cover are welded from splashing to the top of the pressing strip, so that the pressing strip is prevented from being burnt by welding slag. The floating connecting piece is used for enabling the pressing strip assembly to move in a self-adaptive manner relative to the guide plate, so that the pressure between the pressing strip and the battery shell is uniform, and the battery shell is tightly propped against the edge of the top cover.

Description

Technical Field

[0001] This application relates to the technical field of secondary battery welding equipment, and particularly to a pressing strip structure for welding the battery top cover. Background Art

[0002] A secondary battery includes a battery case and a top cover. The top cover is embedded in the upper opening of the battery case, and the edges around the top cover are welded to the inner wall of the upper opening, thereby encapsulating the battery cell material in the battery case.

[0003] When the welding equipment welds the top cover and the battery case, the pressing strip of the welding equipment abuts against the outer wall of the top of the battery case, so that the inner wall of the top of the battery case closely abuts against the edge of the top cover, which is conducive to the welding equipment to weld and connect the top cover and the battery case.

[0004] During the welding process of the top cover and the battery case, the generated sparks splash onto the pressing strip, thus burning the pressing strip. After the pressing strip is burned, it causes the pressing strip to be unable to tightly press the top of the outer wall of the battery case, and thus the inner wall of the top of the battery case cannot closely abut against the edge of the top cover.

[0005] In addition, when the battery case is not accurately positioned, or the installation accuracy of the pressing strip is not high, the pressing surface of the pressing strip and the outer wall surface of the battery case cannot be kept in mutual fit, resulting in uneven pressure between the pressing strip and the battery case, and it is difficult to make the edges of the battery case and the top cover closely abut. Summary of the Utility Model

[0006] The embodiments of this application provide a pressing strip structure for welding the battery top cover to solve the problem in the related art that the pressing surface of the pressing strip and the outer wall surface of the battery case cannot be kept in mutual fit, resulting in uneven pressure between the pressing strip and the battery case.

[0007] The embodiments of this application provide a pressing strip structure that can be used for welding the battery top cover, including:

[0008] A pressing strip assembly, the pressing strip assembly includes a pressing strip and a heat protection strip connected to each other. The heat protection strip covers the top of the pressing strip. One side of the pressing strip is provided with a pressing surface, and the pressing surface is exposed outside the heat protection strip;

[0009] A floating assembly, the floating assembly includes a guide plate, and a floating connecting piece connected to the pressing strip assembly is provided on the guide plate. The floating connecting piece enables the pressing strip assembly to move adaptively relative to the guide plate.

[0010] In some embodiments: The floating connecting piece includes a plurality of compression springs arranged at intervals between the pressing strip assembly and the guide plate, and a plurality of bolts penetrating into the guide plate and threadedly connected to the pressing strip assembly. The plurality of compression springs are respectively arranged on the plurality of bolts.

[0011] In some embodiments, the guide plate has a strip-shaped structure, and a plurality of mounting holes are formed in the guide plate at intervals along the length direction of the guide plate. A plurality of bolts respectively penetrate into the plurality of mounting holes. The inner diameter of the mounting hole is larger than the outer diameter of the screw rod of the bolt and smaller than the outer diameter of the head of the bolt.

[0012] In some embodiments, the guide plate is located on the back of the pressing strip assembly. A plurality of threaded holes respectively connected to the bolts are formed on one side of the heat protection strip away from the pressing surface of the pressing strip, and a plurality of fixing holes are further provided on the guide plate.

[0013] In some embodiments, both the pressing strip and the heat protection strip have a strip-shaped structure, and the heat protection strip is connected to the pressing strip by a plurality of screws.

[0014] In some embodiments, a receiving groove extending along the length direction of the heat protection strip and used to cover the top of the pressing strip is formed at the bottom of the heat protection strip;

[0015] The pressing strip and the heat protection strip are connected to each other to jointly form the pressing strip assembly with a rectangular cross-section.

[0016] In some embodiments, the width of the pressing strip is smaller than the width of the heat protection strip. The pressing surface of the pressing strip is located on one side of the heat protection strip, and the height of the pressing surface of the pressing strip is the same as the height of the heat protection strip.

[0017] In some embodiments, the transverse cross-sectional shape of the pressing strip is the same as the transverse cross-sectional shape of the receiving groove. The top of the pressing strip is provided with a top surface whose height is lower than the top of the pressing surface, and an inclined downward slope is provided between the top of the pressing surface and the top surface.

[0018] In some embodiments, an abutting surface parallel to the pressing surface is provided on one side of the pressing strip away from the pressing surface, and a stopping surface mutually fitting with the abutting surface is provided at the bottom of the heat protection strip.

[0019] In some embodiments, the pressing strip is made of engineering plastic, and the heat protection strip is any one of copper, brass, aluminum alloy or stainless steel.

[0020] The beneficial effects brought by the technical solution provided by this application include:

[0021] The embodiment of the present application provides a pressing strip structure for battery top cover welding. Since the pressing strip structure for battery top cover welding of the present application is provided with a pressing strip assembly, the pressing strip assembly includes a pressing strip and a heat protection strip connected to each other. The heat protection strip covers the top of the pressing strip. One side of the pressing strip is provided with a pressing surface, and the pressing surface is exposed outside the heat protection strip; a floating assembly, the floating assembly includes a guide plate, and a floating connecting piece connected to the pressing strip assembly is arranged on the guide plate, and the floating connecting piece enables the pressing strip assembly to move adaptively relative to the guide plate.

[0022] Therefore, the pressing strip structure for battery top cover welding of the present application is provided with a heat protection strip covering the pressing strip on the top of the pressing strip. The heat protection strip is used to prevent the sparks generated during the welding between the battery case and the top cover from splashing to the top of the pressing strip, thereby preventing the pressing strip from being burned by the welding slag. Furthermore, it is ensured that the pressing strip can press the top of the outer wall of the battery case through the pressing surface, so that the inner wall of the top of the battery case is closely abutted against the edge of the top cover, which is beneficial for the welding equipment to weld and connect the top cover and the battery case.

[0023] In addition, a floating assembly is arranged on one side of the pressing strip assembly. The floating assembly is connected to the pressing strip assembly by using a guide plate and a floating connecting piece. The guide plate is used to connect the power equipment, and a floating connecting piece is connected between the guide plate and the pressing strip assembly. The floating connecting piece is used to enable the pressing strip assembly to move adaptively relative to the guide plate. When the power equipment drives the guide plate to press the pressing strip assembly through the floating connecting piece, the pressing strip assembly can move adaptively according to the matching relationship with the battery case, so that the pressing surface of the pressing strip fits with the battery case, and further the pressure between the pressing strip and the battery case is evenly stressed, and the edges of the battery case and the top cover are kept closely abutted. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0025] Figure 1 is a schematic structural diagram of an embodiment of the present application;

[0026] Figure 2 is an exploded view of the structure of an embodiment of the present application.

[0027] REFERENCE SIGNS:

[0028] 10. Pressing strip assembly; 11. Pressing strip; 12. Heat protection strip; 13. Pressing surface; 14. Screw; 15. Accommodating groove; 16. Slope surface; 17. Top surface; 18. Contact surface; 19. Stopping surface;

[0029] 20. Floating component; 21. Guide plate; 22. Floating connecting piece; 23. Compression spring; 24. Bolt; 25. Mounting hole. Specific implementation manner

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0031] The embodiment of the present application provides a bead structure for battery top cover welding, which can solve the problem in the related art that the pressing surface of the bead cannot be kept in mutual fit with the outer wall surface of the battery case, resulting in uneven pressure force between the bead and the battery case.

[0032] See Figure 1 and Figure 2 As shown in

[0033] The bead structure for battery top cover welding according to the embodiment of the present application includes: a bead assembly 10, which includes a pressing strip 11 and a thermal protection strip 12 connected to each other; a pressing surface 13 is provided on one side of the pressing strip 11, and the pressing surface 13 is used to contact and press the top of the outer wall of the battery case so that the inner wall of the top of the battery case is closely abutted against the edge of the top cover. The thermal protection strip 12 covers the top of the pressing strip 11, a pressing surface 13 is provided on one side of the pressing strip 11, and the pressing surface 13 is exposed outside the thermal protection strip 12. The thermal protection strip 12 is used to prevent the sparks generated during the welding between the battery case and the top cover from splashing onto the top of the pressing strip 11, thereby preventing the pressing strip 11 from being burned by welding slag.

[0034] A floating component 20, which includes a guide plate 21. A floating connecting piece 22 connected to the bead assembly 10 is provided on the guide plate 21, and the floating connecting piece 22 enables the bead assembly 10 to move adaptively relative to the guide plate 21. When the power device drives the guide plate 21 to press the bead assembly 10 through the floating connecting piece 22, the bead assembly 10 can move adaptively according to the cooperation relationship with the battery case to adjust its posture so that the pressing surface 13 of the pressing strip 11 fits with the battery case.

[0035] In the bead structure for battery top cover welding according to the embodiment of the present application, a thermal protection strip 12 covering the pressing strip 11 is provided on the top of the pressing strip 11. The thermal protection strip 12 is used to prevent the sparks generated during the welding between the battery case and the top cover from splashing onto the top of the pressing strip 11, thereby preventing the pressing strip 11 from being burned by welding slag.

[0036] Furthermore, it is ensured that the pressing strip 11 can press the top of the outer wall of the battery case through the pressing surface 13, so that the inner wall of the top of the battery case is closely abutted against the edge of the top cover. Furthermore, it is beneficial for the welding equipment to weld and connect the top cover and the battery case, and the service life of the pressing strip 11 is improved.

[0037] In addition, a floating assembly 20 is provided on one side of the pressing strip assembly 10. The floating assembly 20 is connected to the pressing strip assembly 10 by using a guide plate 21 and a floating connecting piece 22. The guide plate 21 is used to connect the power equipment. A floating connecting piece 22 is connected between the guide plate 21 and the pressing strip assembly 10. The floating connecting piece 22 is used to make the pressing strip assembly 10 adaptively move relative to the guide plate 21.

[0038] When the power equipment drives the guide plate 21 to press the pressing strip assembly 10 through the floating connecting piece 22, the pressing strip assembly 10 can adaptively move according to the matching relationship with the battery case, so that the pressing surface 13 of the pressing strip 11 fits with the battery case. Furthermore, the pressure between the pressing strip 11 and the battery case is evenly distributed, and the edge of the battery case and the top cover are kept in close abutment.

[0039] In some alternative embodiments: Refer to Figure 1 and Figure 2 As shown, the embodiment of the present application provides a pressing strip structure that can be used for welding the battery top cover. The floating connecting piece 22 of the pressing strip structure includes a plurality of compression springs 23 that are spaced apart between the pressing strip assembly 10 and the guide plate 21, and a plurality of bolts 24 that penetrate into the guide plate 21 and are threadedly connected to the pressing strip assembly 10. The plurality of compression springs 23 are respectively arranged on the plurality of bolts 24.

[0040] In the floating connecting piece 22 of the embodiment of the present application, a plurality of compression springs 23 are provided between the pressing strip assembly 10 and the guide plate 21. The plurality of compression springs 23 are respectively arranged on the plurality of bolts 24. The pressing strip assembly 10 can freely float at multiple angles under the elastic support of the plurality of compression springs 23. In order to limit the floating range of the pressing strip assembly 10, a plurality of bolts 24 are further connected between the pressing strip assembly 10 and the guide plate 21 to provide support for the pressing strip assembly 10.

[0041] In some alternative embodiments: Refer to Figure 1 and Figure 2 As shown, the embodiment of the present application provides a pressing strip structure that can be used for welding the battery top cover. The guide plate 21 of the pressing strip structure is a long strip structure. A plurality of mounting holes 25 are provided on the guide plate 21 at intervals along the length direction of the guide plate 21. The plurality of bolts 24 respectively penetrate into the plurality of mounting holes 25. The inner diameter of the mounting hole 25 is larger than the outer diameter of the screw rod of the bolt 24 and smaller than the outer diameter of the head of the bolt 24. The bolt 24 is preferably but not limited to a hexagon socket head cap screw.

[0042] The guide plate 21 of the embodiment of the present application is in a strip-shaped structure. The strip-shaped guide plate 21 facilitates arranging a plurality of bolts 24 at intervals. The plurality of bolts 24 can be sequentially inserted into a plurality of mounting holes 25 along the length direction of the guide plate 21 and then connected to the pressing strip assembly 10. The inner diameter of the mounting hole 25 is larger than the outer diameter of the bolt 24, so that the bolt 24 has a certain amount of movement in the mounting hole 25 of the guide plate 21, and thus the pressing strip assembly 10 has a corresponding floating amount relative to the guide plate 21. Figure 1 In the Y-axis direction is the length direction, the X-axis direction is the width direction, and the Z-axis direction is the height direction.

[0043] In some alternative embodiments: Refer to Figure 1 and Figure 2 As shown, the embodiment of the present application provides a pressing strip structure that can be used for battery top cover welding. The guide plate 21 of the pressing strip structure is located on the back of the pressing strip assembly 10. A plurality of threaded holes respectively connected to the bolts 24 are provided on one side of the heat protection strip 12 away from the pressing surface 13 of the pressing strip 11. A plurality of fixing holes are also provided on the guide plate 21, and the plurality of fixing holes are used for fixedly connecting to a power device. The power device can be a cylinder or an electric cylinder that performs linear telescopic motion, etc.

[0044] In some alternative embodiments: Refer to Figure 1 and Figure 2 As shown, the embodiment of the present application provides a pressing strip structure that can be used for battery top cover welding. Both the pressing strip 11 and the heat protection strip 12 of the pressing strip structure are in strip-shaped structures, and the heat protection strip 12 is connected to the pressing strip 11 by a plurality of screws 14. A receiving groove 15 extending along the length direction of the heat protection strip 12 and used to cover the top of the pressing strip 11 is provided at the bottom of the heat protection strip 12; the pressing strip 11 and the heat protection strip 12 are connected to each other to jointly form a pressing strip assembly 10 with a rectangular cross-section.

[0045] The width of the pressing strip 11 is smaller than the width of the heat protection strip 12. The pressing surface 13 of the pressing strip 11 is located on one side of the heat protection strip 12, and the pressing surface 13 is not covered by the heat protection strip 12, and the height of the pressing surface 13 of the pressing strip 11 is the same as the height of the heat protection strip 12. The transverse cross-sectional shape of the pressing strip 11 is the same as the transverse cross-sectional shape and size of the receiving groove 15. The top surface 17 lower than the top of the pressing surface 13 is provided at the top of the pressing strip 11. An inclined surface 16 inclined downward is provided between the top of the pressing surface 13 and the top surface 17, and the inclined surface 16 extends upward to the top of the heat protection strip 12.

[0046] On one side of the pressing strip 11 facing away from the pressing surface 13, there is an abutting surface 18 arranged parallel to the pressing surface 13. At the bottom of the thermal protection strip 12, there is a stopping surface 19 that fits with the abutting surface 18. The pressing strip 11 is made of engineering plastics, such as high-temperature resistant materials like PEEK (polyetheretherketone) or Teflon. The thermal protection strip 12 is made of any one of copper, brass, aluminum alloy or stainless steel. The hardness of the thermal protection strip 12 is higher than that of the pressing strip 11, and the thermal conductivity and ablation resistance of the thermal protection strip 12 are better than those of the pressing strip 11, enabling the thermal protection strip 12 to have good thermal protection ability.

[0047] Working principle

[0048] The embodiment of the present application provides a pressing strip structure for battery top cover welding. Since the pressing strip structure for battery top cover welding of the present application is provided with a pressing strip assembly 10, the pressing strip assembly 10 includes a pressing strip 11 and a thermal protection strip 12 that are connected to each other. The thermal protection strip 12 covers the top of the pressing strip 11. On one side of the pressing strip 11, there is a pressing surface 13, and the pressing surface 13 is exposed outside the thermal protection strip 12; a floating assembly 20, the floating assembly 20 includes a guide plate 21, and a floating connecting piece 22 connected to the pressing strip assembly 10 is provided on the guide plate 21, and the floating connecting piece 22 enables the pressing strip assembly 10 to move adaptively relative to the guide plate 21.

[0049] Therefore, the pressing strip structure for battery top cover welding of the present application is provided with a thermal protection strip 12 covering the pressing strip 11 on the top of the pressing strip 11. The thermal protection strip 12 is used to prevent the sparks generated during the welding between the battery case and the top cover from splashing to the top of the pressing strip 11, thereby preventing the pressing strip 11 from being burned by the welding slag. Furthermore, it is ensured that the pressing strip 11 can press the outer wall top of the battery case through the pressing surface 13, so that the inner wall of the top of the battery case is closely abutted against the edge of the top cover, which is beneficial for the welding equipment to weld and connect the top cover and the battery case.

[0050] In addition, a floating assembly 20 is provided on one side of the pressing strip assembly 10. The floating assembly 20 is connected to the pressing strip assembly 10 by using the guide plate 21 and the floating connecting piece 22. The guide plate 21 is used to connect the power equipment. A floating connecting piece 22 is connected between the guide plate 21 and the pressing strip assembly 10, and the floating connecting piece 22 is used to enable the pressing strip assembly 10 to move adaptively relative to the guide plate 21. When the power equipment drives the guide plate 21 to press the pressing strip assembly 10 through the floating connecting piece 22, the pressing strip assembly 10 can move adaptively according to the matching relationship with the battery case, so that the pressing surface 13 of the pressing strip 11 fits with the battery case, and further the pressure between the pressing strip 11 and the battery case is evenly stressed, keeping the edges of the battery case and the top cover closely abutted.

[0051] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0052] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0053] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A pressure strip structure for welding a battery top cover, characterized in that: include: A pressure strip assembly (10), the pressure strip assembly (10) comprising a compression strip (11) and a heat protection strip (12) connected to each other, the heat protection strip (12) covering the top of the compression strip (11), a compression surface (13) being provided on one side of the compression strip (11), and the compression surface (13) being exposed to the outside of the heat protection strip (12); A floating assembly (20), the floating assembly (20) comprising a guide plate (21), the guide plate (21) being provided with a floating connection member (22) connected to the pressure strip assembly (10), the floating connection member (22) enabling the pressure strip assembly (10) to move adaptively relative to the guide plate (21).

2. The pressure strip structure for battery top cover welding according to claim 1, characterized in that: The floating connection member (22) comprises a plurality of compression springs (23) arranged at intervals between the pressure strip assembly (10) and the guide plate (21), and a plurality of bolts (24) penetrating into the guide plate (21) and threadedly connected to the pressure strip assembly (10), wherein the plurality of compression springs (23) are respectively arranged on the plurality of bolts (24).

3. The pressure strip structure for battery top cover welding according to claim 2, characterized in that: The guide plate (21) is a long strip structure. The guide plate (21) is provided with a plurality of mounting holes (25) spaced apart along the length direction of the guide plate (21). The plurality of bolts (24) are respectively inserted into the plurality of mounting holes (25). The inner diameter of the mounting hole (25) is larger than the outer diameter of the screw rod of the bolt (24) and smaller than the outer diameter of the head of the bolt (24).

4. The pressure strip structure for battery top cover welding according to claim 2, characterized in that: The guide plate (21) is parallel to the pressure strip assembly (10) and is located on a side away from the pressing surface (13); a plurality of threaded holes respectively connected to the bolts (24) are provided on a side of the heat protection strip (12) away from the pressing surface (13) of the pressing strip (11); and a plurality of fixing holes are also provided on the guide plate (21).

5. The pressure strip structure for battery top cover welding according to claim 1, characterized in that: The compression strip (11) and the heat protection strip (12) are both long strip structures, and the heat protection strip (12) is connected to the compression strip (11) via a plurality of screws (14).

6. The pressure strip structure for battery top cover welding according to claim 1 or 5, characterized in that: The bottom of the heat protection strip (12) is provided with a receiving groove (15) extending along the length direction of the heat protection strip (12) and used to cover the top of the pressing strip (11); The pressing strip (11) and the heat protection strip (12) are connected to each other to form the pressing strip assembly (10) having a rectangular cross section.

7. The pressure strip structure for battery top cover welding according to claim 6, characterized in that: The width of the compression strip (11) is smaller than the width of the heat protection strip (12), the compression surface (13) of the compression strip (11) is located on one side of the heat protection strip (12), and the height of the compression surface (13) of the compression strip (11) is the same as that of the heat protection strip (12).

8. The pressure strip structure for battery top cover welding according to claim 6, characterized in that: The transverse cross-sectional shape of the clamping strip (11) is the same as the transverse cross-sectional shape of the accommodating groove (15); the top of the clamping strip (11) is provided with a top surface (17) whose height is lower than the top of the clamping surface (13); and a downwardly inclined slope surface (16) is provided between the top of the clamping surface (13) and the top surface (17).

9. The pressure strip structure for battery top cover welding according to claim 6, characterized in that: A contact surface (18) arranged parallel to the pressing surface (13) is provided on the side of the pressing strip (11) facing away from the pressing surface (13), and a stop surface (19) is provided at the bottom of the heat protection strip (12) and is in contact with the contact surface (18).

10. The pressure strip structure for battery top cover welding according to claim 1, characterized in that: The pressing strip (11) is made of engineering plastics, and the heat protection strip (12) is made of any one of copper, brass, aluminum alloy or stainless steel.

Images