Lithium battery sealing structure

Abstract

The utility model relates to the field of lithium batteries and discloses a lithium battery sealing structure which comprises a battery shell, a cavity groove is formed in the side wall of the battery shell, an impermeable layer is arranged in the cavity groove, a containing cavity is formed in the battery shell, a battery inner core is arranged in the containing cavity, a pole head is arranged above the battery inner core, and a negative plate is arranged below the battery inner core. An inner clamping groove is formed in the inner side of the upper portion of the battery shell, a sealing piece is arranged on the inner clamping groove, a sealing groove is formed in the upper portion of the battery shell, a battery cover plate is arranged on the sealing groove, the sealing piece comprises a gasket clamped on the inner clamping groove, an annular plate is arranged on the inner side of the gasket, a clamping ring is arranged on an inner ring of the annular plate, and a frosted layer is arranged on the inner wall of the clamping ring. And the inner wall of the clamping ring is attached to the pole head, so that the sealing performance of the lithium battery can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a lithium battery sealing structure. Background Art

[0002] With the growing development of mobile devices and the increasing demand for mobile devices, the demand for batteries as the energy source of mobile devices has also increased dramatically. Among these batteries are lithium batteries. Lithium batteries are a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. Lithium batteries have the characteristics of long service life, high rated voltage, and strong power tolerance.

[0003] Generally, lithium battery sealing mainly adopts the form of rubber sealing ring. The side wall of the shell is squeezed by special sealing equipment, so that the side wall shrinks inward and squeezes the sealing ring to form a seal for the product. However, this sealing form is greatly affected by the tolerance of the material and the processing accuracy of the equipment, and is prone to the risk of leakage. Therefore, we propose a lithium battery sealing structure. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a lithium battery sealing structure to solve the problems mentioned in the above background.

[0005] The utility model provides the following technical solution: The utility model discloses a lithium battery sealing structure, including a battery shell, a side wall of the battery shell is provided with a cavity, an anti-seepage layer is arranged in the cavity, a containing cavity is arranged in the battery shell, a battery core is arranged in the containing cavity, a pole head is arranged above the battery core, a negative electrode sheet is arranged below the battery core, an inner card groove is provided on the inner side of the upper part of the battery shell, a sealing member is arranged on the inner card groove, a sealing groove is provided on the upper part of the battery shell, and a battery cover is arranged on the sealing groove.

[0006] As a preferred solution, the sealing member includes a gasket clamped on the inner groove, a ring plate is arranged on the inner side of the gasket, and a clamping ring is arranged on the inner ring of the ring plate.

[0007] As a preferred solution, the inner wall of the clamping ring is provided with a frosted layer, and the inner wall of the clamping ring is in contact with the pole head.

[0008] As a preferred solution, a card frame is provided below the battery cover plate, the longitudinal cross-sections of the sealing groove and the card frame are T-shaped, a rubber layer is provided on the outer side of the card frame, and the card frame and the sealing groove are engaged with each other.

[0009] As a preferred solution, the inner sides of the inner card groove, the sealing groove and the gasket are coated with a waterproof sealant layer.

[0010] As a preferred solution, a pole cap is provided in the middle of the battery cover plate, and the pole head is clamped in the pole cap.

[0011] As a preferred solution, the surfaces of the battery housing and the battery cover are provided with an anti-corrosion coating.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model adopts the structural setting of the sealing member, wherein the gasket is placed in the inner groove, and the inner wall of the clamping ring is provided with a frosted layer, the pole head is fitted with the clamping ring, and the sealing member seals the battery core, thereby improving the sealing performance of the lithium battery.

[0014] By arranging a rubber layer on the outer side of the card frame, the longitudinal sections of the sealing groove and the card frame are in a T-shape, and the card frame and the sealing groove are engaged with each other, so that the stability of the engagement between the card frame and the sealing groove is improved.

[0015] A waterproof sealant layer is applied on the inner side of the inner card slot, the sealing slot and the gasket to improve the sealing performance of the connection between the battery cover and the battery shell, and the sealing member seals the battery core, thereby improving the sealing performance of the lithium battery.

[0016] By opening a cavity on the side wall of the battery shell and providing an anti-seepage layer in the cavity, the battery shell has a double-layer side wall structure to prevent liquid from seeping out of the battery core, thereby improving the sealing of the lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0018] Figure 2 is a partial cross-sectional view of a battery casing;

[0019] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0020] Figure 4 It is a three-dimensional structural diagram of the battery cover.

[0021] In the figure: 1. battery shell; 2. anti-seepage layer; 3. battery core; 4. pole head; 5. inner card slot; 6. sealing slot; 7. battery cover; 8. gasket; 9. ring plate; 10. snap ring; 11. card rack; 12. rubber layer; 13. pole cap. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figures 1 to 4 A lithium battery sealing structure of the present embodiment includes a battery shell 1, which is a steel shell, so that the battery shell 1 has good impact resistance, thereby improving the service life of the lithium battery, a cavity is provided on the side wall of the battery shell 1, and an anti-seepage layer 2 is provided in the cavity, so that the battery shell 1 has a double-layer side wall structure, which prevents liquid from seeping out of the battery core 3, thereby improving the sealing of the lithium battery, a cavity is provided in the battery shell 1, and a battery core 3 is provided in the cavity, a pole head 4 is provided above the battery core 3, and a negative electrode sheet is provided below the battery core 3, so that the battery core 3 forms an electrode, an inner card groove 5 is provided on the inner side of the upper part of the battery shell 1, and a sealing member is provided on the inner card groove 5, which improves the sealing of the lithium battery and prevents liquid from seeping out of the battery core 3, thereby making the lithium battery safer to use, a sealing groove 6 is provided on the top of the battery shell 1, and a battery cover 7 is provided on the sealing groove 6, so that the battery core 3 is stably encapsulated in the cavity of the battery shell 1.

[0024] like Figure 2 , 3 As shown, the seal includes a gasket 8 clamped on the inner slot 5, a ring plate 9 is provided on the inner side of the gasket 8, a clamping ring 10 is provided on the inner ring of the ring plate 9, the gasket 8 is made of rubber, the ring plate 9 is made of silicone, and the ring plate 9 is made of polyethylene. The outer side of the seal is clamped in the inner slot 5, the pole head 4 is fitted with the clamping ring 10, and then the battery core 3 is sealed in the cavity, thereby improving the sealing of the lithium battery.

[0025] like Figure 2 , 3 As shown, the inner wall of the clamp ring 10 is provided with a frosted layer, and the inner wall of the clamp ring 10 fits with the pole head 4, and the sealing member seals the battery core 3, thereby improving the sealing performance of the lithium battery.

[0026] like Figure 2 , 4 As shown, a card frame 11 is arranged below the battery cover plate 7, the longitudinal cross-sections of the sealing groove 6 and the card frame 11 are T-shaped, a rubber layer 12 is arranged on the outside of the card frame 11, and the card frame 11 and the sealing groove 6 are engaged with each other, so that the stability of the engagement between the card frame 11 and the sealing groove 6 is improved.

[0027] like Figure 1 , 2As shown in Figure 4, the inner side of the inner card slot 5, the sealing groove 6 and the gasket 8 is coated with a waterproof sealant layer, and the waterproof sealant layer is an acrylic sealant, which is a transparent sealant with good water resistance and weather resistance. After curing, it presents a transparent appearance. By coating the inner side of the inner card slot 5, the sealing groove 6 and the gasket 8 with a waterproof sealant layer, the sealing performance of the connection between the battery cover 7 and the battery housing 1 is improved, and the sealant seals the battery core 3, thereby improving the sealing performance of the lithium battery.

[0028] like Figure 2 As shown, a pole cap 13 is provided in the middle of the battery cover 7, and the pole head 4 is clamped in the pole cap 13, which can improve the stability of the battery core 3 in the battery housing 1, and the pole cap 13 is the positive pole of the lithium battery.

[0029] like Figure 1 , 2 As shown, the surfaces of the battery housing 1 and the battery cover 7 are provided with an anti-corrosion coating to improve the service life of the battery housing 1 and the battery cover 7 and prevent the liquid seeping out of the battery core 3 from corroding the battery housing 1 and the battery cover 7 .

[0030] In the specific implementation of this embodiment, through the structural setting of the sealing member, the gasket 8 is placed in the inner groove 5, and the inner wall of the snap ring 10 is provided with a frosted layer, the pole head 4 is fitted with the snap ring 10, and the sealing member seals the battery core 3, thereby improving the sealing of the lithium battery, the longitudinal cross-section of the sealing groove 6 and the card frame 11 is T-shaped, and a rubber layer 12 is provided on the outer side of the card frame 11, and the card frame 11 and the sealing groove 6 are mutually engaged, so that the stability of the engagement between the card frame 11 and the sealing groove 6 is improved, and a waterproof sealant layer is applied on the inner side of the inner groove 5, the sealing groove 6 and the gasket 8, thereby improving the sealing of the connection between the battery cover 7 and the battery shell 1, and the sealing member seals the battery core 3, thereby improving the sealing of the lithium battery, and a cavity is opened on the side wall of the battery shell 1, and an anti-seepage layer 2 is provided in the cavity, so that the battery shell 1 has a double-layer side wall structure to prevent liquid from seeping out of the battery core 3, thereby improving the sealing of the lithium battery.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery sealing structure, comprising a battery housing (1), characterized in that: The side wall of the battery housing (1) is provided with a cavity, an impermeable layer (2) is arranged in the cavity, a chamber is arranged in the battery housing (1), a battery core (3) is arranged in the chamber, a pole (4) is arranged above the battery core (3), a negative electrode sheet is arranged below the battery core (3), an inner slot (5) is provided on the inner side of the upper part of the battery housing (1), a sealing member is arranged on the inner slot (5), a sealing slot (6) is provided on the upper part of the battery housing (1), and a battery cover (7) is arranged on the sealing slot (6).

2. A lithium battery sealing structure according to claim 1, characterized in that: The sealing member comprises a gasket (8) clamped on the inner clamping groove (5), a ring plate (9) is arranged on the inner side of the gasket (8), and a clamping ring (10) is arranged on the inner ring of the ring plate (9).

3. A lithium battery sealing structure according to claim 2, characterized in that: The inner wall of the clamping ring (10) is provided with a frosted layer, and the inner wall of the clamping ring (10) is in contact with the pole head (4).

4. A lithium battery sealing structure according to claim 1, characterized in that: A card frame (11) is arranged below the battery cover plate (7); the longitudinal cross-sections of the sealing groove (6) and the card frame (11) are T-shaped; a rubber layer (12) is arranged on the outside of the card frame (11); and the card frame (11) and the sealing groove (6) are mutually engaged.

5. A lithium battery sealing structure according to claim 3, characterized in that: The inner sides of the inner card groove (5), the sealing groove (6) and the gasket (8) are coated with a waterproof sealant layer.

6. A lithium battery sealing structure according to claim 1, characterized in that: A pole cap (13) is arranged in the middle of the battery cover plate (7), and the pole head (4) is clamped in the pole cap (13).

7. A lithium battery sealing structure according to claim 1, characterized in that: The surfaces of the battery housing (1) and the battery cover plate (7) are provided with an anti-corrosion coating.

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