Aqueous battery sealing profiling pressure maintaining device

Abstract

The utility model provides an aqueous battery sealing profiling pressure-maintaining device, which is characterized in that a battery upper cover is arranged at the top of a battery lower shell, the battery upper cover is provided with a convex edge, a groove and an electrode bulge, a cushion block is arranged in each groove, a profiling limiting plate is arranged outside each cushion block and surrounds all the cushion blocks, the profiling limiting plate covers the edge of the battery upper cover, and the edge of the battery upper cover is provided with an electrode bulge. A pressing plate is arranged above the profiling limiting plate in a covering manner, a pressing machine pressing head for applying pressure is arranged above the pressing plate, and a base is arranged at the bottom of the battery lower shell; the full-thread lead screw sequentially penetrates through the pressing plate, the battery upper cover, the battery lower shell and the bottom plate from top to bottom, the upper end of the full-thread lead screw is locked with the pressing plate through a locking nut, and the full-thread lead screw is fixedly connected with the base through two lead screw nuts arranged on the upper side and the lower side of the base through the lower end of the full-thread lead screw. The screw rod is not easy to deform, and the positioning accuracy is improved; the periphery of the press fit is uniformly stressed, and the edge is covered, so that less liquid and gas leakage is generated; therefore, the glue sealing stability is improved, and battery scrapping is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of aqueous batteries, in particular to a sealed, contour-profiling and pressure-maintaining device for aqueous batteries. Background Art

[0002] The structure of an aqueous battery, such as an aqueous sodium ion battery structure disclosed in the utility model patent with authorization announcement number CN221327962U, includes a battery shell and a top plate, and the battery shell and the top plate are fixed by a penetrating connecting rod.

[0003] In the aforementioned aqueous battery structure, during assembly, the battery housing and top plate are connected using glue (a glue-sealing process). This glue-sealing process for aqueous sodium-ion batteries requires pressurizing the battery. Under pressure, the sealant solidifies and condenses through heating or chemical reactions. Conventional assembly processes utilize independent press blocks for direct pressing. However, due to a certain height error between the bottom surfaces of the press blocks, the four cavities cannot be aligned. This causes uneven force on the top plate during pressure maintenance, creating gaps at the edges and leading to air leaks. The positioning screw is susceptible to deformation during use, and during continued assembly, deformation and inaccurate positioning can damage the battery, resulting in a poor appearance. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in order to overcome the shortcomings of the assembly process of the battery upper cover and the battery lower shell in the prior art, the utility model provides a water-based battery sealing, profiling and pressure-maintaining device.

[0005] The technical solution to be adopted by the utility model to solve its technical problems is: a water-based battery sealing profiling pressure-maintaining device, comprising a battery lower shell, the top cover of the battery lower shell is provided with a battery upper cover, and the top of the battery upper cover has intersecting ridges, which divide it into multiple grooves, and the edge of one side of the battery upper cover has two electrode protrusions for indicating the position of the positive and negative electrodes, each groove of the battery upper cover is provided with a pad, and a profiling limit plate is provided outside the pad to surround all the pads, and the profiling limit plate covers the edge of the battery upper cover. The edge is on the edge, and the upper surface of the contoured limit plate is flush with the upper surface of the pad. A pressure plate is provided on the upper cover of the contoured limit plate, and a press head is provided above the pressure plate, and the press head can exert pressure on the pressure plate; the bottom of the battery lower shell is provided with a base for limiting and fixing it; it also includes a plurality of full-thread screws, which pass through the pressure plate, the battery upper cover, the battery lower shell and the bottom plate from top to bottom in sequence, and the upper end is locked with the pressure plate by a locking nut, and the lower end is fixed to the base by two screw nuts arranged on the upper and lower sides of the base.

[0006] In the above structure, the pressing head directly applies a pressure of 2T on the pressing plate, which is transmitted to the battery cover (the center position of the four areas) through the pad. The sealing areas around the battery cover and the battery lower shell are not subjected to force. This will cause the upper and lower matching positions to be poorly sealed during the pressing process, resulting in gaps and air leakage. Therefore, in order to ensure that the four sides are evenly stressed during the pressing process, a contoured limit plate is added. Through the cooperation of the contoured limit plate and the pressing block, force can be applied in the middle area and uniform force can be applied on all sides, thereby avoiding force. Poor uniformity leads to leakage of liquid and air in the gap, which will scrap the battery.

[0007] If the full-thread screw is only fixed by the upper and lower screw nuts, because the full-thread screw is long, with a total length of about 350mm, it needs to be locked and unscrewed by the locking nut after the final pressing is completed. Repeated disassembly and reuse can easily cause the screw to deform, causing the two to be misaligned when the robot places the battery lower shell (the battery cell inside is already installed and weighs about 15KG), causing the battery to be damaged and scrapped. Therefore, in order to solve the problem that the full-thread screw is difficult to position and easy to deform, causing the battery shell to be damaged, it further includes an anti-deformation component arranged at the bottom of the battery lower shell and connected to the base. The anti-deformation component includes a sleeve and a limiting fixing block. The sleeve is sleeved on the full-thread screw at the bottom of the battery lower shell. The limiting fixing block has a fixing clamp hole. The sleeve passes through the fixing clamp hole and is locked by a locking screw arranged on the limiting fixing block. The other end of the limiting fixing block is fixed to the base by a bolt. Preferably, the height of the sleeve is 30-50mm, matching the battery lower shell.

[0008] Furthermore, the contoured limiting plate is a rectangular frame structure, and its bottom surface is provided with two limiting grooves that match the electrode protrusions on the battery cover. The concave and convex structure of the battery cover cooperates with the contoured limiting plate structure to achieve positioning and limiting of the pad inside the contoured limiting plate.

[0009] Furthermore, four right-angle limit platforms are provided on the upper surface of the base, and the inner sides of the four right-angle limit platforms together form a positioning cavity of the battery lower shell, and the bottom of the battery lower shell is embedded in the positioning cavity.

[0010] Furthermore, the contoured limiting plate is made of aluminum through machining.

[0011] Preferably, the pad is made of hard plastic.

[0012] More preferably, the hard plastic is (including but not limited to) ABS plastic, polyethylene, polypropylene or nylon, and has a pressure resistance of 4-5T.

[0013] Furthermore, the height error between the upper surface of the contoured limiting plate and the upper surface of the cushion block is less than 0.5 mm, ensuring that the pressure is simultaneously and evenly transmitted to the upper surface of the contoured limiting plate and the cushion block.

[0014] Furthermore, the shape of the contoured limiting plate matches the shape of the battery cover, and the outer contour size of the contoured limiting plate is 5-10 mm larger than the size of the battery cover to ensure complete contact between the battery cover and the battery lower shell.

[0015] Furthermore, the contoured limit plate is a rectangular frame structure, and the gap between its inner side and the pad is 1-2 mm, which facilitates the transmission of press force so that the entire battery cover is subjected to force, thereby improving the stability of the force on the cover during pressure maintenance.

[0016] The beneficial effects of the present invention are as follows: the present invention provides a water-based battery sealing contouring and pressure-maintaining device, in which the screw rod is not easily deformed and the positioning accuracy is improved; the force is evenly distributed around the pressing and the edges are covered, so that less liquid and air leakage occurs; thereby improving the stability of the glue seal and reducing battery scrapping. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 It is a structural schematic diagram of the aqueous battery of the utility model.

[0019] Figure 2 It is a structural schematic diagram of the utility model of the sealing, profiling and pressure-maintaining device for aqueous batteries.

[0020] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0021] Figure 4 The utility model is a schematic diagram of the exploded structure of the sealing contour-keeping pressure-maintaining device for aqueous batteries.

[0022] Figure 5 It is a top view structural diagram of a water-based battery sealing contouring and pressure-maintaining device.

[0023] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure of AA.

[0024] Figure 7 yes Figure 5 Schematic diagram of the cross-sectional structure of the BB.

[0025] Figure 8 yes Figure 7 Schematic diagram of the enlarged structure at point B in the middle.

[0026] Figure 9 It is a schematic diagram of the exploded structure of the battery sealing contour pressure maintaining device.

[0027] Figure 10 It is a structural diagram of a contoured limiting plate.

[0028] Figure 11 It is a structural diagram of the base.

[0029] Figure 12 It is a structural diagram of the connection between the anti-deformation component and the base.

[0030] Figure 13 It is a schematic diagram of the assembly structure of the contoured limit plate, the pad, and the battery cover.

[0031] In the figure: 1. Press head, 1.1. Press column, 2. Locking nut, 3. Press plate, 4. Spacer, 5. Contour limit plate, 5.1. Limit groove, 6. Battery cover, 6.1. Groove, 6.2. Ridge, 6.3. Electrode protrusion, 7. Battery lower shell, 8. Full-thread screw, 9. Sleeve, 10. Limit fixing block, 11. Locking screw, 12. Bolt, 13. Screw nut, 14. Base, 14.1. Right-angle limit table. DETAILED DESCRIPTION

[0032] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating the basic structure of the present invention only in a schematic manner. They therefore only show components relevant to the present invention, and directions and references (e.g., up, down, left, right, etc.) are intended solely to facilitate the description of features in the drawings. The following detailed description is therefore not to be taken in a limiting sense, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0033] like Figures 1-13As shown, the utility model is a sealed contour-keeping pressure-maintaining device for an aqueous battery, comprising a battery lower shell 7, the top cover of the battery lower shell 7 being provided with a battery upper cover 6, and the top of the battery upper cover 6 having intersecting ridges 6.2, which divide it into a plurality of grooves 6.1, and the edge of one side of the battery upper cover 6 having two electrode protrusions 6.3 for indicating the position of the positive and negative electrodes, each groove 6.1 of the battery upper cover 6 being provided with a pad 4, and the pad 4 being provided with a contour-keeping limiting plate 5 outside, surrounding all the pads 4, the contour-keeping limiting plate 5 covering the edge of the battery upper cover 6, and the upper surface of the contour-keeping limiting plate 5 being flush with the upper surface of the pad 4, preferably, the height error between the upper surface of the contour-keeping limiting plate 5 and the upper surface of the pad 4 is less than 0.5mm. The contour-keeping limiting plate 5 is a rectangular frame structure, and the gap between its inner side and the pad 4 is 1-2mm, which facilitates the transmission of the force of the press so that the entire battery upper cover 6 is subjected to force, thereby improving the stability of the force on the upper cover during pressure maintenance. The contoured limit plate 5 is covered with a pressure plate 3, and a press head 1 is located above the pressure plate 3. Four pressure posts 1.1 are located on the bottom surface of the press head 1, and the pressure posts 1.1 of the press head 1 can apply pressure to the pressure plate 3. The shape of the contoured limit plate 5 matches the shape of the battery upper cover 6. The outer contour of the contoured limit plate 5 is 5-10mm larger than the size of the battery upper cover 6 to ensure full contact between the battery upper cover 6 and the battery lower shell 7. The bottom of the battery lower shell 7 is provided with a base 14 for limiting and fixing it. It also includes multiple full-thread screws 8. The full-thread screws 8 pass through the pressure plate 3, the battery upper cover 6, the battery lower shell 7, and the bottom plate from top to bottom. The upper ends of the full-thread screws 8 are locked to the pressure plate 3 by locking nuts 2, and the lower ends are fixed to the base 14 by two screw nuts 13 arranged on the upper and lower sides of the base 14. The spacer 4 in this embodiment is made of hard plastic. The hard plastic is (including but not limited to) ABS plastic, polyethylene, polypropylene or nylon, and has a pressure resistance of 4-5T.

[0034] like Figure 8 and Figure 12 As shown, the battery lower shell 7 also includes an anti-deformation component disposed at the bottom thereof and connected to the base 14. The anti-deformation component includes a sleeve 9 and a position-limiting fixed block 10. The sleeve 9 is sleeved on the full-thread screw 8 at the bottom of the battery lower shell 7. The position-limiting fixed block 10 has a fixing hole through which the sleeve 9 passes. The fixing hole is locked by a locking screw 11 disposed on the position-limiting fixed block 10. The other end of the position-limiting fixed block 10 is fixed to the base 14 by a bolt 12. Preferably, the height of the sleeve 9 is 30-50 mm, matching the height of the battery lower shell 7.

[0035] like Figure 10As shown, the contoured stopper plate 5 is a rectangular frame with two stopper grooves 5.1 on its bottom surface that mate with the electrode protrusions 6.3 on the battery cover 6. The contoured stopper plate 5 utilizes the inherent concave and convex structure of the battery cover 6 to coordinate with the structure of the contoured stopper plate 5 to position and limit the pad 4 inside the contoured stopper plate 5. The contoured stopper plate 5 is machined from aluminum.

[0036] like Figure 11 As shown, the upper surface of the base 14 is provided with four right-angled limit platforms 14.1, the inner sides of the four right-angled limit platforms 14.1 together form a positioning cavity for the battery lower shell 7, and the bottom of the battery lower shell 7 is embedded in the positioning cavity.

[0037] Assembly and working principle:

[0038] Pass the full-thread screw 8 through the base 14 and fix it with the upper and lower screw nuts 13. Fix the limit fixing block 10 on the base 14 with bolts 12. Then pass the sleeve 9 through the full-thread screw 8 and place it on the limit fixing block 10. Fix the sleeve with the locking screw 11.

[0039] Pass the full-thread screw 8 through the reserved holes on the battery upper cover 6 and the battery lower shell 7 and place them on the base 14 with a limit. Place the pad 4 in the groove 6.1 in the center part of the battery upper cover 6, and place the contoured limit plate 5 on the periphery. The pad 4 and the contoured limit plate 5 are at the same height to ensure consistent and uniform pressing.

[0040] Finally, put the pressure plate 3, then put the locking nut 2, and press it together with a press (2T pressure, the press head 1 acts on the pressure plate 3). After pressing, tighten the locking nut 2.

[0041] Let it stand for 10-20 hours to allow the glue to solidify, then release the press pressure, remove the full-thread screw 8, pressing plate 3, pad 4 and contoured limit plate 5, remove the glue-sealed battery and enter the next process.

[0042] Experimental results verification:

[0043] 200 batteries were sealed using the original device (comparative example) and the contour-forming pressure-maintaining device (embodiment), and the seal qualification rate and the number of unqualified samples were tested. As can be seen from Table 1, the total battery qualification rate of the group using the contour-forming pressure-maintaining device was 100%. There were 5 unqualified products in the comparative example due to air / liquid leakage between the battery cover and the battery lower shell 7, while there were no unqualified products in the embodiment. This is mainly because the added contour-forming pressure-maintaining device can form uniform pressure on the battery cover, thereby avoiding pressure concentration in the center of the four cavities. Due to the elasticity of the plastic shell, the gap between the battery cover and the battery lower shell 7 increases, resulting in incomplete sealing.

[0044]

[0045] There are 2 columns of defective products caused by battery damage and scrapping, while there are no defective products in the comparative example. This is mainly because the fixing mechanism of the full-thread screw 8 improves the positioning accuracy of the full-thread screw 8 and improves its verticality in the vertical direction, ensuring that the hole position deviation is reduced when the robot places the battery lower shell 7, and the probability of error is greatly reduced.

[0046] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the scope of the present invention. The technical scope of this utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A water-based battery sealing, profiling and pressure-maintaining device, characterized by: The battery lower shell comprises a battery lower shell, the top cover of the battery lower shell is provided with a battery upper cover, and the top of the battery upper cover has intersecting ridges, which divide it into multiple grooves, and the edge of one side of the battery upper cover has two electrode protrusions, and each groove of the battery upper cover is provided with a pad, and a contoured limiting plate is provided outside the pad to surround all the pads, the contoured limiting plate is covered on the edge of the battery upper cover, and the upper surface of the contoured limiting plate is flush with the upper surface of the pad, and the upper cover of the contoured limiting plate is provided with a pressure plate, and a press head is provided above the pressure plate, which can apply pressure on the pressure plate; the bottom of the battery lower shell is provided with a base for limiting and fixing it; it also includes multiple full-thread screws, which pass through the pressure plate, the battery upper cover, the battery lower shell and the bottom plate from top to bottom in sequence, and the upper end is locked with the pressure plate by a locking nut, and the lower end is fixed to the base by two screw nuts arranged on the upper and lower sides of the base.

2. The aqueous battery sealing contouring and pressure-maintaining device according to claim 1, wherein: It also includes an anti-deformation component arranged at the bottom of the battery lower shell and connected to the base, the anti-deformation component includes a sleeve and a limiting fixing block, the sleeve is sleeved on the full-thread screw at the bottom of the battery lower shell, the limiting fixing block has a fixing clamp hole, the sleeve passes through the fixing clamp hole, and the fixing clamp hole is locked by a locking screw arranged on the limiting fixing block, and the other end of the limiting fixing block is fixed to the base by a bolt.

3. The aqueous battery sealing contouring and pressure maintaining device according to claim 1, wherein: The contoured limiting plate is a rectangular frame structure, and two limiting grooves matching the electrode protrusions on the battery cover are provided on its bottom surface.

4. The aqueous battery sealing contouring and pressure maintaining device according to claim 1, wherein: The upper surface of the base is provided with four right-angled limiting platforms, the inner sides of the four right-angled limiting platforms jointly form a positioning cavity of the battery lower shell, and the bottom of the battery lower shell is embedded in the positioning cavity.

5. The aqueous battery sealing contouring and pressure maintaining device according to claim 1, wherein: The contoured limiting plate is made of aluminum through machining.

6. The aqueous battery sealing contouring and pressure maintaining device according to claim 1, wherein: The cushion block is made of hard plastic.

7. The aqueous battery sealing contouring and pressure maintaining device according to claim 6, characterized in that: The hard plastic is ABS plastic, polyethylene, polypropylene or nylon, and has a pressure tolerance of 4-5T.

8. The aqueous battery sealing contouring and pressure maintaining device according to claim 1, wherein: The height error between the upper surface of the contoured limiting plate and the upper surface of the pad is less than 0.5 mm.

9. The aqueous battery sealing, contouring, and pressure-maintaining device according to claim 1, wherein: The shape of the contoured limiting plate matches the shape of the battery cover, and the outer contour size of the contoured limiting plate is 5-10 mm larger than the size of the battery cover.

10. The aqueous battery sealing contouring and pressure maintaining device according to claim 1, wherein: The contoured limiting plate is a rectangular frame structure, and the gap between the inner side surface and the pad is 1-2 mm.

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