Graphite negative electrode structure combination

Abstract

The utility model relates to the technical field of lithium batteries, in particular to a graphite cathode structure combination, which solves the technical problem that an anti-collision layer structure in the prior art is too complicated and is not convenient to disassemble and assemble, and is characterized in that a protective layer structure is arranged in a shell body, and a lithium ion battery core is arranged in the protective layer structure; the end part of the protective layer structure is matched with the shell body to form a step structure; the shell body is also provided with an extension end; the shockproof gasket is arranged in the protective layer structure; the filling piece can be clamped in a clamping space formed by the step structure and the extending end, and the shockproof gasket is clamped on the protective layer structure. The shock-proof gasket and the step structure can play a role in buffering, and the structural part of the technical scheme is detachable, so that an enforceable foundation is provided for recycling and secondary utilization.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a graphite negative electrode structure combination. Background Art

[0002] In the current method, lithium-ion batteries use metal oxides as positive electrode materials and graphite as negative electrode materials;

[0003] Lithium batteries have a wide range of applications. In the prior art, protection designs for lithium batteries are generally provided through combined structures.

[0004] For example, the Chinese utility model patent, publication number CN219513220U, specifically includes: a supporting shell, a lithium-ion battery cell body is arranged inside the supporting shell, the lithium-ion battery cell body is coated with an anti-corrosion inner layer and a fireproof outer layer, electrode exposure openings are opened at both ends of the supporting shell, and both poles of the lithium-ion battery cell body are provided with graphite electrode sheets located inside the electrode exposure openings; and an anti-collision wrapping outer layer, which is arranged inside the supporting shell and wrapped around the outside of the lithium-ion battery cell body having the anti-corrosion inner layer and the fireproof outer layer. This device protects the lithium-ion battery cell body through the supporting shell, and while the anti-collision wrapping outer layer plays a role in anti-collision, it can also reduce the vibration caused by the collision and the damage to the lithium battery caused by the vibration through its elastic deformation ability, thereby improving the protection ability of the lithium battery;

[0005] However, the problem with the prior art is that, in order to solve the problem of extrusion, too many anti-collision layers are set, resulting in a complicated structure. It is understandable that the cited documents have a positive effect on solving the problems of the prior art, but the complicated structure leads to an increase in manufacturing costs and is not conducive to recycling and reuse; therefore, it is necessary to propose a combined structure, which, while having the function of anti-collision and buffering, is conducive to disassembly and assembly and reduces manufacturing costs, providing a basis for recycling and reuse. Utility Model Content

[0006] The utility model aims to solve the technical problem in the prior art that the anti-collision layer structure is too complicated and thus is not conducive to disassembly and assembly, and provides a graphite negative electrode structure combination.

[0007] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0008] A graphite negative electrode structure combination, comprising a lithium ion battery core 1 and a graphite electrode sheet 2, comprising:

[0009] The outer shell body 10 has a protective layer structure 20 inside, and the lithium-ion battery core 1 is arranged in the protective layer structure 20;

[0010] The end of the protective layer structure 20 cooperates with the shell body 10 to form a stepped structure 30;

[0011] The housing body 10 also has an extension end 101;

[0012] A shock-proof washer 40, arranged in the protective layer structure 20;

[0013] The filling piece 50 can be stuck in the insertion space formed by the step structure 30 and the extension end 101 , and can clamp the anti-vibration gasket 40 on the protective layer structure 20 .

[0014] Specifically, the protective layer structure 20 includes:

[0015] An inner anti-corrosion layer 210 having an epoxy anti-corrosion coating and an outer fireproof layer 220 having a fireproof coating;

[0016] The outer fireproof layer 220 is arranged adjacent to the outer shell body 10;

[0017] When viewed in the cross-sectional direction of the ion battery core 1, the end height of the inner anti-corrosion layer 210 is greater than the height of the outer fireproof layer 220;

[0018] The height of the outer fireproof layer 220 is greater than the height of the outer shell body 10 .

[0019] Specifically, the cross-sectional shape of the shock-absorbing gasket 40 is a square.

[0020] Specifically, the extension end 101 includes:

[0021] A connecting body 101a, which is fixedly connected to the outer shell body 10 and makes the end of the outer shell body 10 extend a preset distance;

[0022] An extension body 101b, which is extended from the connecting body 101a and forms a filling space with the housing body 10;

[0023] The extension body 101b is provided with external threads in the radial direction.

[0024] Specifically, the filler 50 includes:

[0025] A filling body 501 having a preformed ring 501a at its center;

[0026] A stepped ring 502a is formed on one side of the filling body 501;

[0027] The step ring 502 a can be stuck on the end of the housing body 10 , the end of the inner anti-corrosion layer 210 , and the end of the outer fireproof layer 220 .

[0028] Specifically, the upper and lower ends of the housing body 10 form openings.

[0029] Optionally, it also includes:

[0030] An end cover 60, wherein the end cover 60 has a leakage hole 601;

[0031] The end cover 60 has an inner annular space 602 , and the filler 50 can be placed in the inner annular space, and the end cover 60 can be screwed and connected to the external thread of the extension body 101 b .

[0032] Optionally, it also includes:

[0033] End cap 60;

[0034] The end cover 60 has an inner annular space 602 , and the filler 50 can be placed in the inner annular space, and the end cover 60 can be screwed and connected to the external thread of the extension body 101 b .

[0035] The utility model has the following beneficial effects:

[0036] The advantage of this technical solution is that the filling piece and the stepped structure are installed in coordination. When the design is subjected to radial impact, axial impact or impact in other directions, the shock-absorbing gasket can play a buffering role, and the stepped structure itself can also achieve a certain degree of buffering effect. In addition, the structural part of this technical solution is detachable, which also provides a feasible basis for recycling and secondary utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] Figure 1 It is a schematic diagram of the structure of the utility model;

[0039] Figure 2 The name of the utility model;

[0040] Figure 3 A schematic diagram of an embodiment of the utility model;

[0041] Figure 4 It is a schematic diagram of another embodiment of the present invention.

[0042] The reference numerals in the figures indicate:

[0043] Shell body 10, protective layer structure 20, lithium ion battery core 1, extension end 101, shockproof gasket 40, filling member 50, inner anti-corrosion layer 210, outer fireproof layer 220;

[0044] Connecting body 101a, extending body 101b;

[0045] Filling body 501, prefabricated ring 501a, and stepped ring 502a;

[0046] End cover 60 , leakage hole 601 , inner annular space 602 . DETAILED DESCRIPTION

[0047] 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; it should be noted that in this application, for the convenience of description, the "left side" in the current view is the "first end", the "right side" is the "second end", the "upper side" is the "first end", and the "lower side" is the "second end". The purpose of such description is to clearly express the technical solution, and it should not be understood as an improper limitation on the technical solution of this application.

[0048] The utility model aims to solve the technical problem that the anti-collision layer structure in the prior art is too complicated, which leads to inconvenience in disassembly and assembly, and provides a graphite negative electrode structure combination. The specific design idea is as follows: Figure 1-3 As shown, the graphite negative electrode structure combination first has a lithium ion battery core 1 and a graphite electrode sheet 2, including: a shell body 10, which has a protective layer structure 20 inside, and the lithium ion battery core 1 is arranged in the protective layer structure 20; the end of the protective layer structure 20 cooperates with the shell body 10 to form a step structure 30; the shell body 10 also has an extension end 101; a shockproof gasket 40 is arranged in the protective layer structure 20; the filling piece 50 can be stuck in the insertion space formed by the step structure 30 and the extension end 101, and the shockproof gasket 40 is stuck on the protective layer structure 20; the filling piece 50 and the step structure 30 are matched and installed, so that when the design is subjected to radial impact or axial impact or impact in other directions, the shockproof gasket 40 can play a buffering role, and the step structure 30 itself can also achieve a certain degree of buffering effect, and the structural part of the technical solution is detachable, which also provides a feasible basis for recycling and secondary utilization.

[0049] In a specific embodiment, see Figure 1 , 2As shown, the protective layer structure 20 includes: an inner anti-corrosion layer 210 having an epoxy anti-corrosion coating and an outer fireproof layer 220 having a fireproof coating; the outer fireproof layer 220 is arranged adjacent to the outer shell body 10; viewed in the cross-sectional direction of the ion battery core 1, the end height of the inner anti-corrosion layer 210 is greater than the height of the outer fireproof layer 220; the height of the outer fireproof layer 220 is greater than the height of the outer shell body 10; that is, the overall protective layer structure 20 extends out of a part of the outer shell body 10, so that the protected part is more sufficient and the protection effect is improved.

[0050] In a specific embodiment, see Figure 1 As shown, the cross-sectional shape of the shockproof washer 40 is a square, so that the shockproof washer can also effectively play a protective role in the radial direction, which is different from the transmission washer that focuses on axial protection.

[0051] In a specific embodiment, see Figure 1 As shown, the extension end 101 includes: a connecting body 101a, which is fixedly connected to the outer shell body 10 and allows the end of the outer shell body 10 to extend a preset distance; an extension body 101b, which is extended on the connecting body 101a and forms a filling space with the outer shell body 10; the extension body 101b is radially provided with an external thread.

[0052] In a specific embodiment, see Figure 1 , 2 As shown, the filler 50 includes: a filling body 501 having a prefabricated ring 501a at the center; a step ring 502a is formed on one side of the filling body 501; the step ring 502a can be stuck on the end of the outer shell body 10, the end of the inner anti-corrosion layer 210 and the end of the outer fireproof layer 220.

[0053] In addition, the upper and lower ends of the housing body 10 are formed with openings.

[0054] In addition to the housing body 10, in order to consider disassembly and as a basis for recycling,

[0055] In the attached Figure 3 In Example 1, a type of end cover 60 is designed, specifically including: an end cover 60, the end cover 60 has a leakage hole 601; the end cover 60 has an inner ring space 602, the filler 50 can be placed in the inner ring space, and the end cover 60 can be screwed and connected to the external thread of the extension body 101b. This is a conventional design, which is arranged as a usage state.

[0056] In the attached Figure 4 In the embodiment 2, another type of end cap 60 is designed.

[0057] It also includes: an end cover 60; the end cover 60 has an inner ring space 602, the filler 50 can be placed in the inner ring space, and the end cover 60 can be screwed and connected to the external thread of the extension body 101b, as an implementation method of transportation and closure, and as a basis for recycling applications.

[0058] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A graphite negative electrode structure assembly, comprising a lithium ion battery core (1) and a graphite electrode sheet (2), characterized in that: include: A shell body (10) having a protective layer structure (20) inside, wherein the lithium-ion battery core (1) is arranged inside the protective layer structure (20); The end of the protective layer structure (20) cooperates with the outer shell body (10) to form a stepped structure (30); The housing body (10) also has an extended end (101); An anti-vibration washer (40) arranged in the protective layer structure (20); A filling piece (50) is capable of being stuck in a stuck-in space formed by the step structure (30) and the extension end (101), and of sticking the anti-vibration washer (40) onto the protective layer structure (20).

2. The graphite negative electrode structure combination according to claim 1, characterized in that: The protective layer structure (20) comprises: An inner anti-corrosion layer (210) having an epoxy anti-corrosion coating and an outer fire-proof layer (220) having a fire-proof coating; The outer fireproof layer (220) is arranged adjacent to the outer shell body (10); When viewed in the cross-sectional direction of the ion battery core (1), the height of the end of the inner anti-corrosion layer (210) is greater than the height of the outer fireproof layer (220); The height of the outer fireproof layer (220) is greater than the height of the outer shell body (10).

3. The graphite negative electrode structure combination according to claim 2, characterized in that: The cross-sectional shape of the shock-proof gasket (40) is a square.

4. The graphite negative electrode structure combination according to claim 2, characterized in that: The extension end (101) comprises: A connecting body (101a) which is fixedly connected to the outer shell body (10) and allows the end of the outer shell body (10) to extend a preset distance; an extension body (101b), which is extended on the connecting body (101a) and forms a filling space between the connecting body and the outer shell body (10); The extension body (101b) is provided with external threads in the radial direction.

5. The graphite negative electrode structure combination according to claim 4, characterized in that: The filling member (50) comprises: A filling body (501) having a preformed ring (501a) at its center; A stepped ring (502a) is formed on one side of the filling body (501); The step ring (502a) can be clamped on the end of the housing body (10), the end of the inner anti-corrosion layer (210) and the end of the outer fireproof layer (220).

6. The graphite negative electrode structure combination according to claim 5, characterized in that: The upper and lower ends of the shell body (10) form openings.

7. The graphite negative electrode structure assembly according to claim 6, characterized in that: Also included are: An end cover (60), wherein the end cover (60) has a leakage hole (601); The end cover (60) is provided with an inner annular space (602), the filler (50) can be placed in the inner annular space, and the end cover (60) can be screwed and connected to the external thread of the extension body (101b).

8. The graphite negative electrode structure assembly according to claim 6, characterized in that: Also included are: End cap (60); The end cover (60) is provided with an inner annular space (602), the filler (50) can be placed in the inner annular space, and the end cover (60) can be screwed and connected to the external thread of the extension body (101b).

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