Lithium battery shell with good sealing performance

Abstract

The utility model provides a lithium battery shell with good sealing performance, which comprises a plastic shell, an aluminum alloy outer frame and a plastic upper cover, a frame groove is arranged on the periphery of the outer part of the plastic shell, the aluminum alloy outer frame is completely clamped in the frame groove, and a metal upper frame body is horizontally fixed at the joint of the plastic shell and the upper end of the aluminum alloy outer frame. A plurality of first positioning notches are formed in the periphery of the metal upper frame body, a square groove is formed in the upper end of the metal upper frame body, and a plurality of micro springs are mounted at the lower end in the square groove. In order to solve the problems in the prior art that an existing battery is large in size, large in weight of a metal shell and not beneficial to lightweight design of the battery, the aluminum alloy and high-strength plastic composite material is adopted, the strength of metal and the lightweight characteristic of plastic are both achieved, meanwhile, a double-layer elastic sealing structure is adopted, moisture and dust can be effectively prevented from entering, and waterproof and dustproof performance is enhanced.

Description

Technical Field

[0001] This utility model is a lithium battery casing with good sealing performance, belonging to the field of lithium battery technology. Background Technology

[0002] The lithium battery casing is a crucial component of a lithium battery, its primary function being to protect the internal cells and electrolyte from the impact of external environmental factors (such as moisture, dust, and mechanical shock) on battery performance. In existing technologies, lithium battery casings are typically made of metal or plastic, using methods such as welding, sealant, or sealing rings to achieve a seal. However, with the diversification of lithium battery applications (such as electric vehicles and energy storage systems), higher demands are being placed on the sealing performance, strength, corrosion resistance, and lightweight design of lithium battery casings.

[0003] Although existing technologies have met the basic requirements for the sealing and strength of lithium battery casings to a certain extent, there are still some shortcomings in practical applications. For example, traditional sealing rings and fixing devices may not be able to completely prevent moisture and dust from entering, especially in harsh environments. In addition, the metal casing is relatively heavy, which is not conducive to the lightweight design of the battery. There is an urgent need for a lithium battery casing with good sealing performance to solve the above-mentioned problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a lithium battery shell with good sealing performance to solve the problems mentioned in the background technology. This utility model adopts an aluminum alloy and high-strength plastic composite material, which combines the strength of metal and the lightweight characteristics of plastic. At the same time, it adopts a double-layer elastic sealing structure, which can effectively prevent moisture and dust from entering and enhance waterproof and dustproof performance.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a lithium battery casing with good sealing performance, comprising a plastic casing, an aluminum alloy frame, and a plastic top cover. The plastic casing has a frame groove around its outer perimeter, and the aluminum alloy frame is completely fitted into the frame groove. A metal top frame is horizontally fixed at the connection between the plastic casing and the upper end of the aluminum alloy frame. Multiple first positioning slots are formed around the metal top frame. A square groove is formed at the upper end of the metal top frame. Multiple micro-springs are installed inside the lower end of the square groove. A square push plate is horizontally installed at the upper end of the multiple micro-springs. A square silicone sealing ring is horizontally adhered to the upper end of the square push plate. An inner frame groove is formed inside the metal top frame. The plastic top cover is placed on top of the plastic casing. A square insert frame and an inner sealing frame are fixed at the lower end of the plastic top cover. The square insert frame is located outside the inner sealing frame, and multiple second positioning slots are formed outside the square insert frame. A square fluororubber sealing gasket is fixed at the lower end of the inner sealing frame.

[0006] Furthermore, triangular metal reinforcing plates are fixed at all four corners of the aluminum alloy outer frame.

[0007] Furthermore, both the plastic outer shell and the plastic top cover are made of high-strength engineering plastic.

[0008] Furthermore, the square insert is fitted into the square groove, and its lower end abuts against the square silicone sealing ring.

[0009] Furthermore, the plurality of second positioning slots are respectively connected to the plurality of first positioning slots, and the plurality of first positioning slots and the plurality of second positioning slots are all fixed with stepped mounting inserts by bolts.

[0010] Furthermore, the inner sealing frame and the square fluororubber sealing gasket are inserted into the inner frame groove.

[0011] The beneficial effects of this utility model are as follows: This utility model provides a lithium battery casing with good sealing performance. Because it incorporates a plastic casing, an aluminum alloy outer frame, a metal upper frame, a stepped mounting plate, a miniature spring, a square push plate, a square silicone sealing ring, a square fluororubber sealing gasket, a plastic top cover, a square insert frame, and an inner sealing frame, our design improvements and practical use have shown that this device has a reasonable structure and good practicality. The use of a composite material of aluminum alloy and high-strength plastic combines the strength of metal with the lightweight characteristics of plastic, reducing the weight of the casing while improving its strength and corrosion resistance. Furthermore, the double-layer elastic sealing structure effectively prevents moisture and dust from entering, enhancing its waterproof and dustproof performance. Attached Figure Description

[0012] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0013] Figure 1 This is a three-dimensional schematic diagram of the overall structure of a lithium battery casing with good sealing performance according to the present invention;

[0014] Figure 2 This is a schematic diagram showing the disassembled design of a well-sealed lithium battery casing according to this utility model.

[0015] Figure 3 This is a schematic diagram of the square push plate connection for a lithium battery casing with good sealing performance according to this utility model.

[0016] In the diagram: 1-Plastic outer shell, 2-Aluminum alloy outer frame, 3-Triangular metal reinforcing plate, 4-Metal upper frame, 5-First positioning groove, 6-Step mounting insert, 7-Second positioning groove, 8-Square groove, 9-Miniature spring, 10-Square push plate, 11-Square silicone sealing ring, 12-Inner frame groove, 13-Square fluororubber sealing gasket, 14-Plastic top cover, 15-Square insert frame, 16-Inner sealing frame. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] Please see Figures 1-3 This utility model provides a technical solution: a lithium battery casing with good sealing performance, including a plastic casing 1, an aluminum alloy outer frame 2, and a plastic top cover 14. The plastic casing 1 has a frame groove around its outer perimeter, and the aluminum alloy outer frame 2 is completely fitted into the frame groove. A metal upper frame 4 is horizontally fixed at the upper connection between the plastic casing 1 and the aluminum alloy outer frame 2. Multiple first positioning slots 5 are formed around the metal upper frame 4. A square groove 8 is formed at the upper end of the metal upper frame 4. Multiple micro springs 9 are installed inside the lower end of the square groove 8. A square push plate 10 is horizontally installed above the multiple micro springs 9, and a square push plate 10 is horizontally adhered to the upper end of the square push plate 10. The design includes a silicone sealing ring 11, an inner frame groove 12 on the inner side of the metal upper frame 4, a plastic upper cover 14 covering the upper end of the plastic outer shell 1, a square insert frame 15 and an inner sealing frame 16 fixed at the lower end of the plastic upper cover 14, the square insert frame 15 being located outside the inner sealing frame 16, and multiple second positioning slots 7 being provided on the outside of the square insert frame 15, and a square fluororubber sealing gasket 13 fixed at the lower end of the inner sealing frame 16. This design solves the problem that the sealing ring and fixing device of the traditional lithium battery shell may not be able to completely prevent moisture and dust from entering, especially in harsh environments, and the metal shell is heavy, which is not conducive to the lightweight design of the battery.

[0019] As the first embodiment of this utility model: triangular metal reinforcing plates 3 are fixed at all four corners of the aluminum alloy outer frame 2. By adding multiple triangular metal reinforcing plates 3, the strength of the four corners of the aluminum alloy outer frame 2 can be improved. The plastic outer shell 1 and the plastic top cover 14 are both made of high-strength engineering plastic. By adding high-strength engineering plastic materials, the plastic outer shell 1 and the plastic top cover 14 are relatively lightweight and have a certain impact resistance.

[0020] A square insert 15 is fitted into a square groove 8, with its lower end abutting against a square silicone sealing ring 11. This square insert 15, fitted into the square groove 8 and with its lower end abutting against the square silicone sealing ring 11, provides a single seal at the connection between the metal upper frame 4 and the plastic upper cover 14. Multiple second positioning slots 7 communicate with multiple first positioning slots 5, and stepped mounting pieces 6 are bolted into each of the multiple first positioning slots 5 and the multiple second positioning slots 7. The addition of these stepped mounting pieces 6, bolted into the multiple first positioning slots 5 and the multiple second positioning slots 7, achieves the fixation between the square insert 15 and the metal upper frame 4, and also facilitates the installation between the plastic outer shell 1 and the plastic upper cover 14. The inner sealing frame 16 and the square fluororubber sealing gasket 13 are inserted into the inner frame groove 12. By inserting the inner sealing frame 16 and the square fluororubber sealing gasket 13 into the inner frame groove 12, the connection between the metal upper frame 4 and the plastic upper cover 14 can be sealed again.

[0021] As a second embodiment of this utility model: the plastic top cover 14 is directly placed on the upper end of the plastic shell 1, so that the square insert frame 15 is inserted into the square groove 8 and is in contact with the square silicone sealing ring 11. Then, the plastic top cover 14 is pressed down, so that the square insert frame 15 is pressed down by the square push plate 10 and the square silicone sealing ring 11 to press down multiple micro springs 9 until multiple second positioning slots 7 are respectively connected to multiple first positioning slots 5. At this time, the inner sealing frame 16 and the square fluororubber sealing gasket 13 will be inserted into the inner frame groove 12. Finally, multiple step mounting inserts 6 are fixed in the multiple first positioning slots 5 and multiple second positioning slots 7 by bolts, so as to realize the fixation between the square insert frame 15 and the metal upper frame 4, and also facilitate the sealing installation between the plastic shell 1 and the plastic top cover 14.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lithium battery casing with good sealing performance, comprising a plastic casing (1), an aluminum alloy frame (2), and a plastic top cover (14), characterized in that: The plastic shell (1) has a frame groove around its outer perimeter, and the aluminum alloy frame (2) is completely fitted into the frame groove. A metal upper frame (4) is horizontally fixed at the upper connection between the plastic shell (1) and the aluminum alloy frame (2). The metal upper frame (4) has multiple first positioning slots (5) around its perimeter. The upper end of the metal upper frame (4) has a square groove (8). Multiple miniature springs (9) are installed inside the lower end of the square groove (8). A square push plate (10) is horizontally installed on the upper end of the multiple miniature springs (9). A square silicone sealing ring (11) is horizontally attached to the upper end of the square push plate (10). An inner frame groove (12) is opened on the inner side of the metal upper frame (4). The plastic cover (14) is placed on the upper end of the plastic shell (1). A square insert frame (15) and an inner sealing frame (16) are fixed at the lower end of the plastic cover (14). The square insert frame (15) is located outside the inner sealing frame (16), and multiple second positioning slots (7) are opened outside the square insert frame (15). A square fluororubber sealing gasket (13) is fixed at the lower end of the inner sealing frame (16).

2. The lithium battery casing with good sealing performance according to claim 1, characterized in that: Triangular metal reinforcing plates (3) are fixed at all four corners of the aluminum alloy outer frame (2).

3. The lithium battery casing with good sealing performance according to claim 1, characterized in that: Both the plastic outer shell (1) and the plastic top cover (14) are made of high-strength engineering plastic.

4. A lithium battery casing with good sealing performance according to claim 1, characterized in that: The square insert (15) is fitted into the square groove (8), and its lower end abuts against the square silicone sealing ring (11).

5. A lithium battery casing with good sealing performance according to claim 1, characterized in that: Multiple second positioning slots (7) are respectively connected to multiple first positioning slots (5), and multiple first positioning slots (5) and multiple second positioning slots (7) are all fixed with stepped mounting plates (6) by bolts.

6. A lithium battery casing with good sealing performance according to claim 1, characterized in that: The inner sealing frame (16) and the square fluororubber sealing gasket (13) are inserted into the inner frame groove (12).

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