Large cylinder energy storage negative electrode structure

Abstract

The utility model discloses a large cylinder energy storage negative electrode structure, which comprises a negative electrode column, a cover plate, an insulation shielding layer and a negative electrode switching sheet which are arranged in sequence, the cover plate, the insulation shielding layer and the negative electrode switching sheet are respectively provided with a central hole, and the negative electrode column penetrates through the central holes of the cover plate, the insulation shielding layer and the negative electrode switching sheet and is electrically connected with the negative electrode switching sheet; the insulation shielding layer covers a gap between the cover plate and the negative electrode adapter plate, the insulation shielding layer is provided with a central ring table, a plurality of reinforcing ribs are arranged at intervals in the circumferential direction of the edge, and a plurality of first circulation holes are formed at intervals in the circumferential direction between the central ring table and the reinforcing ribs; second circulation holes in one-to-one correspondence with the plurality of first circulation holes are formed in the circumferential direction of the negative electrode adapter plate; a liquid injection hole is formed in the cover plate on one side of the central hole; the liquid injection hole is communicated with one group of the first circulation hole and the second circulation hole and is used for injecting electrolyte; through the design, the technical problems of high processing cost and easy short circuit of the existing cathode lead-out structure are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of energy storage cell charging and discharging, and particularly relates to a large cylindrical energy storage negative electrode structure. BACKGROUND

[0002] With the rapid generation and development of new technologies in the fields of information technology, electronic products and vehicle energy, people pay more attention to the research and development of novel supercapacitors. Supercapacitors are a new type of energy storage device between traditional capacitors and rechargeable batteries, which have both the large-current rapid charging and discharging characteristics of capacitors and the energy storage characteristics of batteries, and the capacity can reach several thousand farads. Compared with traditional capacitors, supercapacitors have higher capacity, and compared with storage batteries, they have the advantages of fast charging speed, high energy density, wide working temperature range and long cycle life, and are pollution-free to the environment, and are particularly suitable for application fields of high frequency, high power and high energy charging and discharging, so they have wide market demand in emerging industries such as rail transit, wind power, public buses, electric vehicles and smart grids.

[0003] Chinese invention patent 201922481942.7 discloses a negative electrode lead-out structure and an energy storage cell, wherein the negative electrode adapter plate and the cover plate are both provided with a center hole, the negative electrode pole penetrates through the center holes of the negative electrode adapter plate and the cover plate and is electrically connected with the negative electrode adapter plate; a sealing ring is arranged between the negative electrode pole and the cover plate for electrical insulation. The structure has the following disadvantages: 1. The cover plate and the negative electrode adapter plate are suspended, and there is no strong insulation measure, so short circuit is easy to occur when metal impurities are encountered; 2. The negative electrode pole injection hole has high processing cost, and when the pole welding is performed on the system composed of the cells, the welding heat affects the sealing performance of the center hole of the cover plate, which causes the risk of liquid leakage. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the defects in the prior art and provides a large cylindrical energy storage negative electrode structure.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A large cylindrical energy storage negative electrode structure comprises a negative electrode pole, a cover plate, an insulating shielding layer and a negative electrode adapter plate arranged in sequence, the cover plate, the insulating shielding layer and the negative electrode adapter plate are all provided with a center hole, the negative electrode pole penetrates through the center holes of the cover plate, the insulating shielding layer and the negative electrode adapter plate and is electrically connected with the negative electrode adapter plate;

[0007] The insulating shielding layer covers the gap between the cover plate and the negative electrode adapter plate, the insulating shielding layer is provided with a center ring table, a plurality of reinforcing ribs are circumferentially and spaced apart at the edge, and a plurality of first flow-through holes are circumferentially and spaced apart between the center ring table and the reinforcing ribs;

[0008] The negative electrode adapter piece is provided with second flow-through holes corresponding to the first flow-through holes in a one-to-one manner in a circumferential direction.

[0009] The cover plate located on one side of the center hole is provided with a liquid injection hole, which is in communication with one group of the first flow-through holes and the second flow-through holes, and is used for injecting electrolyte.

[0010] Preferably, an insulating piece is arranged between the negative electrode column and the cover plate, and the insulating piece is arranged around the outer circle of the maximum diameter of the negative electrode column.

[0011] Preferably, a sealing ring is arranged between the outer wall of the negative electrode column located at the center hole and the cover plate.

[0012] Preferably, the top and bottom of the insulating shielding layer are both provided with a center ring table and a plurality of reinforcing ribs.

[0013] Preferably, the center ring table located at the top and bottom of the insulating shielding layer is both provided with a positioning pin, the cover plate is provided with a positioning concave table matched with the positioning pin, and the negative electrode adapter piece is provided with a positioning hole matched with the positioning pin.

[0014] Preferably, the liquid injection hole is blocked by a rubber plug penetrating through the liquid injection hole, the first flow-through hole and the second flow-through hole, and the top of the rubber plug is further provided with an aluminum plug.

[0015] Preferably, the cover plate and the liquid injection hole are integrally formed by stamping.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] The utility model adds the insulating shielding layer between the cover plate and the negative electrode adapter piece, greatly reduces the risk of short circuit of the cover plate and the negative electrode adapter piece, the cover plate and the liquid injection hole are integrally formed by stamping, the production cost is low in batch production, when the energy storage monomer system is welded, the liquid injection hole is not affected by welding heat, and the sealing failure and liquid leakage phenomenon do not occur, when the energy storage monomer is injected, the electrolyte reaches the area below the adapter piece, the injection speed is fast, and the production efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall structure schematic diagram of the utility model;

[0019] Figure 2 It is the sectional view of the utility model;

[0020] Figure 3 It is the exploded view of the overall structure of the utility model.

[0021] In the figure: 1, negative pole post; 2, cover plate; 21, liquid injection hole; 211, rubber plug; 212, aluminum plug; 22, positioning recess; 3, insulating shielding layer; 31, center ring table; 311, positioning pin; 32, reinforcing rib; 33, first flow-through hole; 4, negative pole adapter plate; 41, second flow-through hole; 42, positioning hole; 5, center hole; 6, insulating piece; 7, sealing ring. DETAILED DESCRIPTION

[0022] A preferred embodiment of the present application will be described below with reference to the accompanying drawings, and the technical solutions in the preferred embodiment of the present application will be clearly and completely described.

[0023] Embodiment 1:

[0024] A large cylindrical energy storage negative pole structure comprises: a negative pole post 1, a cover plate 2, an insulating shielding layer 3 and a negative pole adapter plate 4 arranged in sequence, the cover plate 2, the insulating shielding layer 3 and the negative pole adapter plate 4 are all provided with a center hole 5, the negative pole post 1 penetrates through the center holes 5 of the cover plate 2, the insulating shielding layer 3 and the negative pole adapter plate 4 and is electrically connected with the negative pole adapter plate 4;

[0025] The insulating shielding layer 3 covers the gap between the cover plate 2 and the negative pole adapter plate 4, the insulating shielding layer 3 is provided with a center ring table 31, and a plurality of reinforcing ribs 32 are circumferentially and spaced apart from the edge, a plurality of first flow-through holes 33 are circumferentially and spaced apart between the center ring table 31 and the reinforcing ribs 32;

[0026] The negative pole adapter plate 4 is circumferentially provided with a plurality of second flow-through holes 41 corresponding to the plurality of first flow-through holes 33;

[0027] The cover plate 2 located on one side of the center hole 5 is provided with a liquid injection hole 21; the liquid injection hole 21 is in communication with one group of the first flow-through holes 33 and the second flow-through holes 41, and is used for injecting electrolyte.

[0028] The present application has the advantages that: the cover plate 2 and the negative pole adapter plate 4 are designed with full coverage insulation, the insulating shielding layer 3 is added, and the risk of short circuit of the cover plate 2 and the negative pole adapter plate 4 is greatly reduced; the liquid injection hole 21 is designed on the cover plate 2, the cover plate 2 is integrally formed by stamping, the processing process is simplified, and the production cost is reduced; a plurality of holes for electrolyte flow are opened on the insulating shielding layer 3 and the negative pole adapter plate 4, the first flow-through holes 33 on the insulating shielding layer 3 and the second flow-through holes 41 on the negative pole adapter plate 4 correspond one by one, the liquid injection hole 21 on the cover plate 2 corresponds to one group of the first flow-through holes 33 and the second flow-through holes 41, and the electrolyte can be rapidly and fully injected into the energy storage monomer, thereby improving the production efficiency.

[0029] Specifically, the insulating piece 6 is arranged between the negative pole 1 and the cover plate 2, and the insulating piece 6 is arranged at the outer ring of the maximum diameter of the negative pole 1.

[0030] The insulating piece 6 of the outer ring of the negative pole 1 can block the heat influence, and the sealing property of the liquid injection hole 21 area is prevented from being damaged.

[0031] Specifically, the sealing ring 7 is arranged between the outer wall of the negative pole 1 of the center hole 5 and the cover plate 2.

[0032] The sealing ring 7 improves the sealing property of the negative pole 1 and the cover plate 2, and prevents the electrolyte from leaking.

[0033] Specifically, the top and bottom of the insulating shielding layer 3 are provided with a center ring table 31 and a plurality of reinforcing ribs 32.

[0034] The double-sided center ring table 31 and the plurality of reinforcing ribs 32 improve the anti-deformation ability of the insulating shielding layer 3, and prevent curling deformation.

[0035] Specifically, the center ring table 31 at the top and bottom of the insulating shielding layer 3 is provided with a positioning pin 311, the cover plate 2 is provided with a positioning recess 22 matched with the positioning pin 311, and the negative pole adapter plate 4 is provided with a positioning hole 42 matched with the positioning pin 311.

[0036] The positioning recess 22 and the positioning hole 42 facilitate quick positioning of the insulating shielding layer 3, and prevent position deviation.

[0037] Specifically, the liquid injection hole 21 is plugged by a rubber plug 211 penetrating the liquid injection hole 21, a first flow-through hole 33 and a second flow-through hole 41, and the top of the rubber plug 211 is further provided with an aluminum plug 212.

[0038] The liquid injection hole 21 is plugged by the rubber plug 211 and the aluminum plug 212, and the overall sealing property is improved.

[0039] Specifically, the cover plate 2 and the liquid injection hole 21 are integrally formed by stamping.

[0040] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A macrocylindrical energy storage anode structure, characterized in that, It includes negative pole post (1), cover plate (2), insulating shielding layer (3) and negative pole adapter piece (4) arranged in sequence, the cover plate (2), insulating shielding layer (3) and negative pole adapter piece (4) are all provided with center hole (5), the negative pole post (1) penetrates the center hole (5) of the cover plate (2), insulating shielding layer (3) and negative pole adapter piece (4) and is electrically connected with the negative pole adapter piece (4); The insulating shielding layer (3) covers the gap between the cover plate (2) and the negative pole adapter piece (4), the insulating shielding layer (3) is provided with center ring table (31), and a plurality of reinforcing ribs (32) are circumferentially spaced apart, a plurality of first flow-through holes (33) are circumferentially spaced apart between the center ring table (31) and the reinforcing rib (32); The negative pole adapter piece (4) is circumferentially provided with a second flow-through hole (41) corresponding to a plurality of first flow-through holes (33) one by one; The cover plate (2) on one side of the center hole (5) is provided with a liquid injection hole (21), the liquid injection hole (21) is communicated with one of the first flow-through hole (33) and the second flow-through hole (41), and is used for injecting electrolyte.

2. The large cylindrical energy storage anode structure of claim 1, wherein, It includes The insulating piece (6) is arranged between the negative pole post (1) and the cover plate (2), and the insulating piece (6) is arranged around the outer circle of the maximum diameter of the negative pole post (1).

3. The large cylindrical energy storing negative electrode structure of claim 1, wherein, It includes A sealing ring (7) is arranged between the outer wall of the negative pole post (1) of the center hole (5) and the cover plate (2).

4. The large cylindrical energy storing negative electrode structure of claim 1, wherein, It includes The insulating shielding layer (3) is provided with a center ring table (31) and a plurality of reinforcing ribs (32) on the top and the bottom.

5. The large cylindrical energy storing negative electrode structure of claim 4, wherein, It includes The center ring table (31) on the top and the bottom of the insulating shielding layer (3) is provided with a positioning pin (311), the cover plate (2) is provided with a positioning concave table (22) matched with the positioning pin (311), and the negative pole adapter piece (4) is provided with a positioning hole (42) matched with the positioning pin (311).

6. The large cylindrical energy storing negative structure of claim 1, wherein, It includes The liquid injection hole (21) is plugged by a rubber plug (211) penetrating the liquid injection hole (21), the first flow-through hole (33) and the second flow-through hole (41), and the top of the rubber plug (211) is further provided with an aluminum plug (212).

7. The large cylindrical energy storing negative structure of claim 1, wherein, It includes The cover plate (2) and the liquid injection hole (21) are integrally formed by stamping.

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