Lithium ion battery shell

Abstract

The utility model discloses a lithium ion battery shell in the technical field of lithium ion batteries, which comprises a lower shell, a heat dissipation through hole is fixedly formed in the surface of the top end of an upper shell, a heat dissipation fan is fixedly mounted on the inner side of the heat dissipation through hole, an upper heat conduction silica gel gasket is fixedly mounted below the inner side of the upper shell, and a lower heat conduction silica gel gasket is fixedly mounted below the inner side of the lower shell. The upper heat conduction silica gel gasket and the heat absorption copper plate are connected in a gluing mode through a heat conduction silicone grease layer, the top of the heat absorption copper plate is fixedly connected with a cooling fin, and heat on the surface of the upper heat conduction silica gel gasket can be conducted through the heat absorption copper plate. The heat conduction rate between the heat absorption copper plate and the upper heat conduction silica gel gasket is improved through the arrangement of the heat conduction silicone grease layer, heat on the surface of the heat absorption copper plate can be absorbed through the cooling fins, and finally the heat on the surface of the cooling fins is discharged to the outside from the interiors of the cooling through holes through the cooling fans.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium-ion batteries, and particularly relates to a lithium-ion battery shell. Background Art

[0002] A lithium-ion battery is a secondary battery (rechargeable battery), which mainly works by the movement of lithium ions between the positive electrode and the negative electrode. During the charge and discharge process, Li+ intercalates and deintercalates between the two electrodes: during charging, Li+ deintercalates from the positive electrode and intercalates into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; during discharging, the opposite occurs. Currently, the shells of lithium-ion batteries all adopt a single cavity, and for lithium batteries with a shell thickness ≥ 45mm, the capacity is relatively high.

[0003] Existing lithium-ion batteries have a higher energy density and a larger charge and discharge rate compared to traditional lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries, etc. Therefore, they generate serious heat during operation, especially in high-temperature summers, and the heat generation is even more intense, significantly affecting the capacity and life of the battery, and even causing safety accidents of electrical equipment. For this reason, we propose a lithium-ion battery shell. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a lithium-ion battery shell to solve the problem of serious heat generation and the need for heat dissipation of existing lithium-ion batteries mentioned in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A lithium-ion battery shell includes a lower shell, an upper shell is arranged above the lower shell, a heat dissipation through hole is arranged at the top of the upper shell, a dust-proof net is arranged inside the heat dissipation through hole, a heat dissipation fan is arranged inside the heat dissipation through hole, an installation groove is arranged inside the lower shell, a lower heat-conducting silica gel gasket is arranged at the bottom of the lower shell, an upper heat-conducting silica gel gasket is arranged below the inner side of the upper shell, a heat-absorbing copper plate is arranged above the upper heat-conducting silica gel gasket, a heat-conducting silicone grease layer is arranged at the bottom of the heat-absorbing copper plate, a heat sink is arranged at the top of the heat-absorbing copper plate, upper fixing blocks are arranged on both sides of the upper shell, upper threaded holes are arranged on the surfaces of the upper fixing blocks, lower fixing blocks are arranged on both sides of the lower shell, lower threaded holes are arranged on the surfaces of the lower fixing blocks, and ventilation holes are arranged at the bottom of the lower shell.

[0006] Preferably, the heat dissipation through hole is fixedly opened on the top surface of the upper shell, a dust-proof net is fixedly installed at the outer end of the heat dissipation through hole, and a heat dissipation fan is fixedly installed inside the heat dissipation through hole.

[0007] Preferably, a plurality of installation grooves are slidably opened at the inner bottom of the lower shell, a lower heat-conducting silica gel gasket is fitted and installed on the bottom surface of the lower shell, and an upper heat-conducting silica gel gasket is fixedly installed below the inner side of the upper shell.

[0008] Preferably, the upper heat-conducting silica gel gasket and the heat-absorbing copper plate are adhesively connected through a heat-conducting silicone grease layer, and a heat sink is fixedly connected to the top of the heat-absorbing copper plate.

[0009] Preferably, upper fixing blocks are fixedly installed on both sides of the upper housing, and upper threaded holes are fixedly formed on the surfaces of the upper fixing blocks.

[0010] Preferably, lower fixing blocks are fixedly installed on both sides of the lower housing, lower threaded holes are fixedly formed on the surfaces of the lower fixing blocks, and a plurality of ventilation holes are fixedly formed at the bottom of the lower housing.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. The heat on the surface of the upper heat-conducting silica gel gasket can be conducted through the heat-absorbing copper plate. The setting of the heat-conducting silicone grease layer improves the heat conduction rate between the heat-absorbing copper plate and the upper heat-conducting silica gel gasket. The heat on the surface of the heat-absorbing copper plate can be absorbed through the heat sink, and finally the heat on the surface of the heat sink is discharged to the outside through the inside of the heat dissipation through hole by the heat dissipation fan.

[0013] 2. By providing the upper heat-conducting silica gel gasket and the lower heat-conducting silica gel gasket, the heat that is not easily dissipated at the top and bottom of the lithium-ion battery can be conducted outward, increasing the heat dissipation efficiency. At the same time, the high electrical insulation and anti-puncture properties unique to the upper heat-conducting silica gel gasket and the lower heat-conducting silica gel gasket can provide good protection for the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 is a schematic diagram of the internal structure of the present utility model;

[0016] Figure 3 is a schematic diagram of the bottom structure of the present utility model.

[0017] In the figure: 1. Lower housing; 2. Upper housing; 3. Heat dissipation through hole; 4. Dust-proof net; 5. Heat dissipation fan; 6. Installation groove; 7. Lower heat-conducting silica gel gasket; 8. Upper heat-conducting silica gel gasket; 9. Heat-absorbing copper plate; 10. Heat-conducting silicone grease layer; 11. Heat sink; 12. Upper fixing block; 13. Upper threaded hole; 14. Lower fixing block; 15. Lower threaded hole; 16. Ventilation hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1-3 , the present invention provides a technical solution: a lithium-ion battery housing, including a lower housing 1, an upper housing 2 is provided above the lower housing 1, a heat dissipation through hole 3 is provided at the top end of the upper housing 2, a dust-proof net 4 is provided inside the heat dissipation through hole 3, a heat dissipation fan 5 is provided inside the heat dissipation through hole 3, an installation groove 6 is provided inside the lower housing 1, a lower heat-conducting silicone gasket 7 is provided at the bottom of the lower housing 1, an upper heat-conducting silicone gasket 8 is provided below the inner side of the upper housing 2, a heat-absorbing copper plate 9 is provided above the upper heat-conducting silicone gasket 8, a heat-conducting silicone grease layer 10 is provided at the bottom of the heat-absorbing copper plate 9, a heat sink 11 is provided at the top of the heat-absorbing copper plate 9, upper fixing blocks 12 are provided on both sides of the upper housing 2, upper threaded holes 13 are provided on the surfaces of the upper fixing blocks 12, lower fixing blocks 14 are provided on both sides of the lower housing 1, lower threaded holes 15 are provided on the surfaces of the lower fixing blocks 14, and ventilation holes 16 are provided at the bottom of the lower housing 1.

[0020] Specifically, a heat dissipation through hole 3 is fixedly opened on the top surface of the upper housing 2, a dust-proof net 4 is fixedly installed at the outer end of the heat dissipation through hole 3, a heat dissipation fan 5 is fixedly installed inside the heat dissipation through hole 3, a plurality of installation grooves 6 are slidably opened at the bottom inside the lower housing 1, a lower heat-conducting silicone gasket 7 is adhesively installed on the bottom surface of the lower housing 1, an upper heat-conducting silicone gasket 8 is fixedly installed below the inner side of the upper housing 2, the upper heat-conducting silicone gasket 8 and the heat-absorbing copper plate 9 are adhesively connected through a heat-conducting silicone grease layer 10, a heat sink 11 is fixedly connected to the top of the heat-absorbing copper plate 9, upper fixing blocks 12 are fixedly installed on both sides of the upper housing 2, upper threaded holes 13 are fixedly opened on the surfaces of the upper fixing blocks 12, lower fixing blocks 14 are fixedly installed on both sides of the lower housing 1, lower threaded holes 15 are fixedly opened on the surfaces of the lower fixing blocks 14, and a plurality of ventilation holes 16 are fixedly opened at the bottom of the lower housing 1.

[0021] In this embodiment, the lithium-ion battery is vertically arranged inside the installation groove 6, so that the top and bottom of the lithium-ion battery are respectively in contact connection with the upper heat-conducting silica gel gasket 8 and the lower heat-conducting silica gel gasket 7, enabling the heat that is not easily dissipated from the top and bottom of the lithium-ion battery to be conducted outward through the upper heat-conducting silica gel gasket 8 and the lower heat-conducting silica gel gasket 7 for heat dissipation. The heat on the surface of the upper heat-conducting silica gel gasket 8 can be conducted through the heat-absorbing copper plate 9. The setting of the thermal grease layer 10 improves the heat conduction rate between the heat-absorbing copper plate 9 and the upper heat-conducting silica gel gasket 8. The heat on the surface of the heat-absorbing copper plate 9 can be absorbed through the heat sink 11, and finally the heat on the surface of the heat sink 11 is discharged to the outside from the inside of the heat dissipation through-hole 3 by the cooling fan 5. The lower heat-conducting silica gel gasket 7 can conduct the heat on its surface to the surface of the lower housing 1 for heat dissipation. At the same time, the ventilation hole 16 provided improves the heat dissipation efficiency of the lower heat-conducting silica gel gasket 7, increases the air flow rate inside the housing, and the battery pack can be well protected by the unique high electrical insulation and anti-puncture properties of the upper heat-conducting silica gel gasket 8 and the lower heat-conducting silica gel gasket 7.

[0022] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium-ion battery housing, comprising a lower housing (1), characterized in that: An upper shell (2) is arranged above the lower shell (1), a heat dissipation through hole (3) is arranged at the top of the upper shell (2), a dust screen (4) is arranged inside the heat dissipation through hole (3), a heat dissipation fan (5) is arranged inside the heat dissipation through hole (3), a mounting groove (6) is arranged inside the lower shell (1), a lower heat-conducting silicone gasket (7) is arranged at the bottom of the lower shell (1), an upper heat-conducting silicone gasket (8) is arranged at the lower inner side of the upper shell (2), and a heat-conducting silicone gasket (8) is arranged above the upper heat-conducting silicone gasket (8). A heat-absorbing copper plate (9) is provided, a thermal grease layer (10) is provided at the bottom of the heat-absorbing copper plate (9), a heat sink (11) is provided at the top of the heat-absorbing copper plate (9), upper fixing blocks (12) are provided on both sides of the upper shell (2), upper threaded holes (13) are provided on the surface of the upper fixing blocks (12), lower fixing blocks (14) are provided on both sides of the lower shell (1), lower threaded holes (15) are provided on the surface of the lower fixing blocks (14), and ventilation holes (16) are provided at the bottom of the lower shell (1).

2. A lithium-ion battery housing according to claim 1, characterized in that: A heat dissipation through hole (3) is fixedly provided on the top surface of the upper shell (2), a dustproof net (4) is fixedly installed on the outer end of the heat dissipation through hole (3), and a heat dissipation fan (5) is fixedly installed on the inner side of the heat dissipation through hole (3).

3. A lithium-ion battery housing according to claim 1, characterized in that: The inner bottom of the lower shell (1) is slidably provided with a plurality of mounting grooves (6), the bottom surface of the lower shell (1) is fitted with a lower thermal conductive silicone gasket (7), and the inner lower part of the upper shell (2) is fixedly provided with an upper thermal conductive silicone gasket (8).

4. A lithium-ion battery housing according to claim 1, characterized in that: The upper heat-conducting silicone gasket (8) and the heat-absorbing copper plate (9) are glued together via a heat-conducting silicone grease layer (10), and a heat sink (11) is fixedly connected to the top of the heat-absorbing copper plate (9).

5. A lithium-ion battery casing according to claim 1, characterized in that: Upper fixing blocks (12) are fixedly mounted on both sides of the upper shell (2), and upper threaded holes (13) are fixedly opened on the surface of the upper fixing blocks (12).

6. A lithium-ion battery housing according to claim 1, characterized in that: Lower fixing blocks (14) are fixedly mounted on both sides of the lower shell (1), lower threaded holes (15) are fixedly provided on the surface of the lower fixing blocks (14), and a plurality of ventilation holes (16) are fixedly provided on the bottom of the lower shell (1).

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