A sealed casing for lithium batteries

Abstract

This utility model claims protection for a sealed lithium battery casing. The key technical features include an end cap, a connector frame, a sealing adhesive layer, and a casing. The connector frame is fixedly connected to the bottom of the end cap, and the inner casing is fixedly connected to the casing. The bottom of the end cap abuts against the top of the sealing adhesive layer, the top of the casing abuts against the bottom of the sealing adhesive layer, and the outer wall of the connector frame abuts against the inner wall of the casing. Compared to traditional designs, this utility model uses the cavity formed by the bottom of the end cap, the outer wall of the connector frame, and the top of the casing as the dispensing area. Therefore, it eliminates the need for a dispensing groove and additional supports, reducing material costs, simplifying the assembly process, and improving production efficiency.

Description

Technical Field

[0001] This utility model relates to a housing, and more specifically, to a sealed housing for a lithium battery. Background Technology

[0002] Due to the restrictions on plastic use in electric bicycles, existing lithium battery casings for the new national standard are made of metal, unlike plastic casings. In actual production, it has been found that metal casings are usually thinner due to weight limitations. This makes it impossible to directly cut adhesive grooves on the casing. Instead, a support is added inside the casing, and adhesive is used to form a sealing layer, which increases the cost of the battery. Therefore, a sealed lithium battery casing is needed. This device can form a sealing layer without the need for an additional support, thereby saving production costs.

[0003] For the reasons mentioned above, the problem addressed in this application is how to form a sealing adhesive layer without the need for additional support. Utility Model Content

[0004] To address the shortcomings of existing technologies, a lithium battery sealing shell is provided. This device can form a sealing adhesive layer by dispensing adhesive without the need for additional brackets, thereby saving production costs.

[0005] To achieve the above objectives, the following technical solution is provided: a lithium battery sealed casing, comprising an end cap, a connector frame, a sealing adhesive layer, and a casing body, wherein the connector frame is fixedly connected to the bottom of the end cap, the bottom of the end cap abuts against the top of the sealing adhesive layer, the top of the casing body abuts against the bottom of the sealing adhesive layer, and the outer wall of the connector frame abuts against the inner wall of the casing body.

[0006] Furthermore, an inner shell is fixedly connected to the outer shell, and the bottom of the plug-in frame abuts against the top of the inner shell.

[0007] Furthermore, a handle is provided on the end cap.

[0008] Furthermore, indicator lights are provided on the end cap.

[0009] Furthermore, the end cap is equipped with a socket and a cover plate, with the cover plate and socket being detachably connected.

[0010] Furthermore, the end cap is equipped with an information reading area, which includes three QR code blocks.

[0011] Furthermore, the outer casing is provided with threaded holes, and bolts are connected to the end caps, with the bolts passing through the sealing adhesive layer and connecting to the threaded holes.

[0012] Furthermore, the sealing adhesive layer includes an inner pad and an outer pad, the inner pad and the outer pad are fixedly connected, the bolts pass through the outer pad and are connected to the threaded holes, and the plug frame passes through the inner pad and is connected to the inner shell.

[0013] Furthermore, the inner wall of the inner padding layer abuts against the outer wall of the insertion frame, and the part where the inner padding layer connects to the outer padding layer is recessed towards the insertion frame.

[0014] In summary, the above technical solution has the following beneficial effects: Compared with the traditional design, the present invention uses the cavity formed by the bottom of the end cap, the outer wall of the plug frame and the top of the outer shell as the dispensing area, so there is no need to set up a dispensing groove or an additional support, which reduces material costs, simplifies the assembly process and improves production efficiency. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a sealed casing for a lithium battery.

[0016] Figure 2 This is an exploded view of the present invention.

[0017] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0018] Reference numerals: 1. End cap; 2. Insertion frame; 3. Sealing adhesive layer; 4. Outer shell; 5. Inner shell; 11. Handle; 12. Indicator light; 13. Socket; 14. Cover plate; 15. Bolt; 16. Information reading area; 17. QR code section; 31. Inner cushioning layer; 32. Outer cushioning layer; 41. Threaded hole. Detailed Implementation

[0019] Reference Figure 1-3 As shown, a lithium battery sealed casing includes an end cap 1, a connector frame 2, a sealing adhesive layer 3, and a casing 4. The connector frame 2 is fixedly connected to the bottom of the end cap 1. The bottom of the end cap 1 abuts against the top of the sealing adhesive layer 3, the top of the casing 4 abuts against the bottom of the sealing adhesive layer 3, and the outer wall of the connector frame 2 abuts against the inner wall of the casing 4.

[0020] In this invention, the end cap 1 and the outer shell 4 are the sealed outer shells of the lithium battery. Multiple sealing effects are achieved through mechanical compression and elastic deformation. The radial support of the plug frame 2 can enhance the structural strength of the top and better withstand physical impact. The connection between the end cap 1 and the outer shell 4 is achieved by using the insertion frame 2 as the core. When the adhesive is applied to form the sealing adhesive layer 3, the uncured adhesive will move around freely, so an adhesive groove is required. However, due to weight considerations, the metal outer shell 4 is relatively thin. Without an adhesive groove, the adhesive is confined within the cavity formed by the bottom of the end cap 1, the outer wall of the insertion frame 2, and the top of the outer shell 4. In this process, the insertion frame 2 plays a dual role as an internal mold and a connecting medium, ensuring that the adhesive can be shaped in the preset position and form an effective sealing adhesive layer 3. Compared with traditional designs, this utility model uses the cavity formed by the bottom of the end cap 1, the outer wall of the plug frame 2, and the top of the outer shell 4 as the dispensing area. Therefore, there is no need to set up a dispensing groove or an additional support, which reduces material costs, simplifies the assembly process, and improves production efficiency.

[0021] An inner shell 5 is fixedly connected inside the outer shell 4. The bottom of the plug frame 2 abuts against the top of the inner shell 5. When the bottom of the plug frame 2 abuts against the top of the inner shell 5, the downward pressure acting on the end cap 1 can be transmitted through the plug frame 2 and dispersed to the inner shell 5, and then transmitted from the inner shell 5 to the entire outer shell 4. This can prevent the sealing adhesive layer 3 from being subjected to excessive pressure for a long time and causing plastic deformation or failure. At the same time, it also provides an additional reference surface for the installation of the plug frame 2, making the assembly more precise.

[0022] The end cap 1 is equipped with a handle 11, an indicator light 12, a socket 13, a cover plate 14, and an information reading area 16. Users can carry the entire battery through the handle 11. The indicator light 12 can only indicate the power status. The cover plate 14 is detachably connected to the socket 13. When the socket 13 is not connected, it is covered by the cover plate 14 to prevent the socket 13 from being damaged. The information reading area 16 includes three QR code blocks 17. The three QR code blocks 17 on the information reading area 16 respectively represent battery parameter information, manufacturer information, and sales location.

[0023] The outer casing 4 is provided with a threaded hole 41, and the end cap 1 is connected with a bolt 15. The bolt 15 passes through the sealing adhesive layer 3 and is connected to the threaded hole 41. The bolt 15 passes through the end cap 1 and the sealing adhesive layer 3, and finally screws into the threaded hole 41 on the outer casing 4. When the bolt 15 is tightened, a downward clamping force is generated. Under the clamping force of the bolt 15, the sealing adhesive layer 3 is compressed between the bottom of the end cap 1 and the top of the outer casing 4, thereby undergoing elastic deformation, filling the micro gaps and uneven processing areas, forming a sealing barrier to prevent liquid and gas from passing through. In addition, in order to protect the bolt 15, an inner groove can be provided in the end cap 1, and the bolt 15 is placed in the inner groove.

[0024] The sealing adhesive layer 3 can usually use FIPG sealant. During the dispensing operation, FIPG sealant is applied to the upper surface of the housing 4 using a glue applicator. The sides of the housing 4 do not need to be glued. The thickness of the glue is usually 0.5mm. After the dispensing is completed, the end cap 1 is pressed down to force the overflowing glue between the outer wall of the plug frame 2 and the inner wall of the housing 4. This not only prevents the glue from overflowing, but also enhances the sealing effect. The capillary effect of FIPG material can fill the tiny gaps in the substrate. The micron-level filling can adaptively fill the shape and size of the sealing surface. When used as a sealing material, FIPG material has high structural integrity, good temperature resistance, wear resistance and chemical resistance. Compared with the sealing solutions of lithium batteries for two-wheeled vehicles on the market, it saves material costs, process costs and labor costs. The sealing adhesive layer 3 includes an inner padding layer 31 and an outer padding layer 32. The inner padding layer 31 and the outer padding layer 32 are fixedly connected. The bolt 15 passes through the outer padding layer 32 and is connected to the threaded hole 41. The plug frame 2 passes through the inner padding layer 31 and is connected to the inner shell 5. The inner wall of the inner padding layer 31 abuts against the outer wall of the plug frame 2. The part where the inner padding layer 31 and the outer padding layer 32 are connected is recessed towards the plug frame 2. Due to the presence of the threaded hole 41, an inner pad 31 with a concave setting and an outer pad 32 formed around the bolt 15 are naturally formed during the dispensing operation. In addition to playing a basic bonding role, the inner pad 31 also undertakes the main sealing role. The plug frame 2 passes directly through the inner pad 31, and the inner pad 31 is pressed tightly between the end cap 1 and the outer shell 4, thereby forming a sealing barrier. The cavity formed by the bottom of the end cap 1, the outer wall of the plug frame 2, and the top of the outer shell 4 can be used as the dispensing area for dispensing. The inner pad 31 formed in this way is height-matched to the outer wall of the plug frame 2. The outer pad 32 plays a buffering role at the bolt 15 instead of forming a large area buffer layer. This not only has a better sealing effect, but also saves more materials. During the dispensing process, the adhesive can be applied directly. If necessary, the outer pad 32 and the inner pad 31 can be made of different materials. The outer pad 32 serves as an auxiliary seal. Since the end cap 1 and the outer shell 4 are connected by bolts 15, in order to prevent excessive stress at the bolt 15 connection point from causing rigidity damage, an additional outer pad 32 is provided between the end cap 1 and the outer shell 4. When the bolts 15 connect the end cap 1 and the outer shell 4, they will pass through the outer pad 32, so the outer pad 32 can act as a buffer.

Claims

1. A sealed casing for a lithium battery, comprising an end cap, a connector frame, a sealing adhesive layer, and a casing body, characterized in that, The plug frame is fixedly connected to the bottom of the end cap. The bottom of the end cap abuts against the top of the sealing adhesive layer. The top of the outer shell abuts against the bottom of the sealing adhesive layer. The outer wall of the plug frame abuts against the inner wall of the outer shell.

2. The lithium battery sealed casing according to claim 1, characterized in that, An inner shell is fixedly connected to the outer shell, and the bottom of the plug-in frame abuts against the top of the inner shell.

3. A lithium battery sealed casing according to claim 1, characterized in that, The end cap is equipped with a handle.

4. A lithium battery sealed casing according to claim 1, characterized in that, The end cap is equipped with an indicator light.

5. A lithium battery sealed casing according to claim 1, characterized in that, The end cap is provided with a socket and a cover plate, and the cover plate and the socket are detachably connected.

6. A lithium battery sealed casing according to claim 1, characterized in that, The end cap is provided with an information reading area, which includes three QR code blocks.

7. A lithium battery sealed casing according to any one of claims 1-6, characterized in that, The outer casing is provided with threaded holes, and the end cap is connected with bolts, which pass through the sealing adhesive layer and are connected to the threaded holes.

8. A lithium battery sealed casing according to claim 7, characterized in that, The sealing adhesive layer includes an inner pad and an outer pad, the inner pad and the outer pad are fixedly connected, the bolt passes through the outer pad and is connected to the threaded hole, and the plug frame passes through the inner pad and is connected to the inner shell.

9. A lithium battery sealed casing according to claim 8, characterized in that, The inner wall of the inner padding layer abuts against the outer wall of the insertion frame, and portions of the inner padding layer and the outer padding layer are recessed toward the insertion frame.

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