Battery cover plate with ptfc coating

Abstract

The utility model relates to a battery field especially relates to a battery cover plate with PTFE coating, including cover plate body, the one side of cover plate body is coated with PTFE coating, the other side of cover plate body both ends symmetry is provided with positive pole assembly, negative pole assembly, positive pole assembly, negative pole assembly all are composed of sealing washer, pole, welding ring, upper plastic, the middle part of cover plate body is equipped with explosion -proof valve hole, and cover plate body is located at the explosion -proof valve hole place through the buckle place is provided with safety valve explosion -proof membrane, explosion -proof valve protection plastic piece, and the other side of cover plate body is located at the explosion -proof valve hole place and is provided with PET face paste, in the utility model, cover plate body cancels the mode of using insulating film, the place needing insulation of original changes to have PTFE coating, through PTFE coating, the thickness of cover plate insulating layer is reduced greatly, provides more accommodating pole piece's space for battery height direction, improves battery energy density.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery cover plate with a PTFE coating. Background Technology

[0002] The existing battery cover has a 0.8mm thick insulating film, which serves to prevent the positive and negative electrode connecting pieces from directly contacting and conducting electricity with the cover.

[0003] Most insulating films are 0.8-1.0 mm thick. Especially for batteries with low height, this reduces the usable space in the height direction of the battery, which restricts the improvement of battery energy density. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a battery cover with a PTFE coating.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A battery cover with a PTFE coating includes a cover body. One side of the cover body is coated with a PTFE coating, and positive and negative electrode components are symmetrically arranged at both ends of the other side of the cover body. The positive and negative electrode components are composed of a sealing ring, a terminal post, a welding ring, and an upper plastic. An explosion-proof valve hole is opened in the middle of the cover body, and a safety valve explosion-proof membrane and an explosion-proof valve protective plastic part are provided on the cover body at the explosion-proof valve hole through a buckle. A PET faceplate is provided on the other side of the cover body at the explosion-proof valve hole.

[0007] In addition, a preferred structure is that the cover plate body has symmetrical buckles at both ends on the side near the PTFE coating and at the explosion-proof valve hole.

[0008] In addition, a preferred structure is that an injection hole is provided on one side of the cover plate body, and a sealing nail is provided on one side of the cover plate body at the injection hole, and a face pad is provided on one side of the cover plate body outside the positive electrode assembly and the negative electrode assembly.

[0009] A battery with a PTFE coating includes a core and an aluminum shell. The outer wall of the core is covered with a Mylar film by tape, and positive and negative tabs are symmetrically arranged on both sides of the top of the core.

[0010] In addition, a preferred structure is that connecting pieces are ultrasonically welded above both the positive and negative electrodes.

[0011] In addition, a preferred structure is that the bottom of the core is provided with a bottom support piece, and the core is covered with an aluminum shell.

[0012] The beneficial effects of this utility model are as follows:

[0013] In this invention, the cover plate body no longer uses insulating film. Instead, the areas that originally required insulation are coated with a PTFE coating. The PTFE coating significantly reduces the thickness of the cover plate insulation layer, providing more space for the electrode sheets in the height direction of the battery and improving the battery energy density. Attached Figure Description

[0014] Figure 1 This is a schematic diagram showing the disassembled structure of a battery cover with a PTFE coating proposed in this utility model.

[0015] Figure 2 This is a schematic diagram of the structure of a battery cover with a PTFE coating proposed in this utility model;

[0016] Figure 3 This is a schematic diagram showing the disassembled structure of a battery cover plate with a PTFE coating proposed in this utility model.

[0017] In the diagram: 1. Aluminum shell; 2. Base plate; 3. Mylar film; 4. Adhesive tape; 5. Core; 6. Positive electrode tab; 7. Negative electrode tab; 8. Cover plate body; 81. Buckle; 82. PTFE coating; 9. Sealing nail; 10. Face pad; 11. Explosion-proof valve protective plastic parts; 12. Safety valve explosion-proof membrane; 13. Connecting piece; 14. Sealing ring; 15. Terminal post; 16. Welding ring; 17. Top plastic; 18. PET faceplate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figure 1-3 A battery cover with a PTFE coating includes a cover body 8, a core 5, and an aluminum shell 1. One side of the cover body 8 is coated with a PTFE coating 82. Positive electrode components and negative electrode components are symmetrically arranged at both ends of the other side of the cover body 8. Both the positive electrode components and the negative electrode components are composed of a sealing ring 14, an electrode post 15, a welding ring 16, and an upper plastic 17. An explosion-proof valve hole is opened in the middle of the cover body 8. A safety valve explosion-proof film 12 and an explosion-proof valve protective plastic part 11 are provided on the cover body 8 at the explosion-proof valve hole through a buckle 81. A PET faceplate 18 is provided on the other side of the cover body 8 at the explosion-proof valve hole.

[0020] It is worth noting that the pole post 15 is made of aluminum, grade 1060-H14, the welding ring 16 is made of conductive polyphenylene sulfide, the upper plastic 17 is made of conductive polyethyleneimine, and the sealing ring 14 is made of fluororubber.

[0021] Furthermore, the cover plate body 8 is symmetrically provided with buckles 81 at both ends on the side of the PTFE coating 82 and at the explosion-proof valve hole. The thickness of the PTFE coating 82 can be 10-100μm. Through the PTFE coating 82, the thickness of the cover plate insulation layer is greatly reduced, providing more space for accommodating the electrode in the height direction of the battery and improving the battery energy density.

[0022] Meanwhile, a liquid injection hole is provided on one side of the cover plate body 8, and a sealing nail 9 is provided on one side of the cover plate body 8 at the liquid injection hole, and a face pad 10 is provided on one side of the cover plate body 8 outside the positive electrode component and the negative electrode component.

[0023] A battery with a PTFE coating includes a core 5 and an aluminum shell 1. The outer wall of the core 5 is covered with a Mylar film 4 by an adhesive tape 4, and positive tabs 6 and negative tabs 7 are symmetrically arranged on both sides of the top of the core 5.

[0024] Meanwhile, connecting pieces 13 are ultrasonically welded above both the positive electrode 6 and the negative electrode 7.

[0025] Furthermore, the bottom of the core 5 is provided with a bottom support plate 2, and the core 5 is covered with an aluminum shell 1.

[0026] It is also worth noting that the battery and cover are fixed by laser welding.

[0027] In this embodiment, the cover plate body 8 no longer uses insulating film. Instead, the original areas that needed insulation are coated with PTFE coating 82. The PTFE coating 82 significantly reduces the thickness of the cover plate insulation layer, providing more space for the electrode sheets in the height direction of the battery and improving the battery energy density.

[0028] In this invention, the cover plate body 8 no longer uses insulating film. Instead, the original areas that needed insulation are coated with PTFE coating 82. The PTFE coating 82 significantly reduces the thickness of the cover plate insulation layer, providing more space for the electrode sheets in the height direction of the battery and improving the battery energy density.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A battery cover with a PTFE coating, comprising a cover body (8), characterized in that, One side of the cover body (8) is coated with a PTFE coating (82), and the other two sides of the cover body (8) are symmetrically provided with a positive electrode component and a negative electrode component. The positive electrode component and the negative electrode component are both composed of a sealing ring (14), an electrode post (15), a welding ring (16), and an upper plastic (17). An explosion-proof valve hole is opened in the middle of the cover body (8), and a safety valve explosion-proof membrane (12) and an explosion-proof valve protective plastic part (11) are provided at the explosion-proof valve hole of the cover body (8) through a buckle (81). A PET faceplate (18) is provided at the explosion-proof valve hole of the other side of the cover body (8).

2. The battery cover with a PTFE coating according to claim 1, characterized in that, The cover plate body (8) has buckles (81) symmetrically arranged at both ends on the side of the PTFE coating (82) and at the explosion-proof valve hole.

3. A battery cover with a PTFE coating according to claim 1, characterized in that, A liquid injection hole is provided on one side of the cover plate body (8), and a sealing nail (9) is provided on one side of the cover plate body (8) at the liquid injection hole, and a face pad (10) is provided on one side of the cover plate body (8) outside the positive electrode assembly and the negative electrode assembly.

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