Negative electrode leading-out mechanism and energy storage capacitor

Abstract

The utility model relates to a cathode leading-out structure of an energy storage capacitor and a corresponding energy storage capacitor. The cathode leading-out structure comprises an integrated cathode column, an insulation sealing member, a cathode cover plate and a cathode collector sheet. A center hole is formed in the center of the cathode cover plate, the integrated cathode column penetrates through the center hole of the cathode cover plate, and the insulating sealing piece is arranged in the center hole of the cathode cover plate to insulate and separate the integrated cathode column from the cathode cover plate; the integrated negative pole comprises a pole and an adapter plate, and the pole and the adapter plate are of an integrated structure; a circular boss is arranged in the center of the upper surface of the switching disc, and a plurality of reinforcing ribs are arranged in the circumferential direction of the circular boss at intervals; the pole column is arranged on the upper surface of the circular boss of the switching disc; and the insulating sealing element is formed between the integrated negative pole and the negative pole cover plate through injection molding. The pole and the switching disc form an integrated structure, so that the assembly between the pole and the switching disc is avoided, and the connection strength between the pole and the switching disc is improved. The insulation sealing piece is formed between the integrated cathode column and the cathode cover plate through injection molding, so that the insulation structure between the integrated cathode column and the cathode cover plate is simplified, the production cost is reduced, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrochemical energy storage, in particular to a negative electrode lead-out mechanism and an energy storage capacitor. Background Art

[0002] With the rapid emergence and development of new technologies in the fields of information technology, electronic products and new energy vehicles, the research and development of energy storage capacitors has received more and more attention. Energy storage capacitors are a new type of energy storage device between traditional capacitors and rechargeable batteries. They have both the large current fast charging and discharging characteristics of capacitors and the energy storage characteristics of batteries. Their capacity can reach several thousand farads. Compared with traditional capacitors, energy storage capacitors have higher capacity, and compared with batteries, they have the advantages of fast charging speed, high energy density, wide operating temperature range and long cycle life, and they are pollution-free to the environment. They are especially suitable for high-frequency, high-power and high-energy charging and discharging applications. Therefore, they have a wide market demand in national strategic emerging industries such as rail transit, wind power generation, public buses, electric vehicles, and smart grids.

[0003] Currently, the negative electrode lead-out mechanism of the energy storage capacitor mainly includes a negative electrode column, a transfer plate, a current collector and a cover plate. For example, in the energy storage capacitor disclosed in the Chinese patent document with announcement number CN214280154U, a battery cell is inserted in the shell, the top of the battery cell is fixedly connected to the negative cover assembly through the negative current collector, and the bottom of the battery cell is fixedly connected to the positive cover assembly through the positive current collector; the negative cover assembly includes a negative column assembly, a first cover, a first insulating member, and a second insulating member; the negative column assembly includes a column and a chassis, a second center hole is opened in the center of the chassis, and a first boss is provided at the bottom of the column, the outer diameter of the first boss is slightly larger than the inner diameter of the second center hole of the chassis, the first boss is pressed into the second center hole, and the two are interference fit, thereby realizing the fixed connection between the column and the chassis, and the chassis is fixed to the negative current collector by welding; the first cover is sleeved on the outer periphery of the column of the negative column assembly, and a first insulating member and a second insulating member are sequentially arranged between the first cover and the column from top to bottom for insulation, and the corresponding surfaces of the first insulating member and the second insulating member abut against each other. However, in the above-mentioned negative electrode lead-out mechanism, the negative electrode column and the chassis serving as the adapter plate are connected by interference fit, and the negative electrode column assembly and the first cover plate are provided with a first insulating member and a second insulating member to perform insulation and sealing functions. The structure is complex and has many parts, which leads to low production and assembly efficiency, cumbersome processing and manufacturing process of the energy storage capacitor, and high manufacturing cost.

[0004] Therefore, there is an urgent need for a new negative electrode lead-out mechanism to solve the problems of complex structure and inconvenient assembly and connection between the negative electrode column, the adapter plate and the cover plate, improve the processing and manufacturing efficiency of the energy storage capacitor and reduce the production cost. Utility Model Content

[0005] The utility model provides a negative electrode lead-out mechanism and an energy storage capacitor, which integrate the negative electrode column and the adapter plate, solve the problems of complex structure and inconvenient connection between the negative electrode column, the adapter plate and the cover plate, simplify the manufacturing and assembly procedures of the energy storage capacitor, and reduce the production cost.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A negative electrode lead-out structure of an energy storage capacitor comprises an integrated negative electrode column, an insulating seal, a negative electrode cover plate and a negative electrode current collector; a center hole is arranged at the center of the negative electrode cover plate, the integrated negative electrode column passes through the center hole of the negative electrode cover plate, the insulating seal is arranged in the center hole of the negative electrode cover plate, and the integrated negative electrode column is insulated and separated from the negative electrode cover plate; the integrated negative electrode column comprises a pole column and a transfer plate, and the pole column and the transfer plate are an integrated structure; a circular boss is arranged at the center of the upper surface of the transfer plate, and a plurality of reinforcing ribs are arranged at intervals along the circumference of the circular boss; the pole column is arranged on the upper surface of the circular boss of the transfer plate; the insulating seal is formed by injection molding between the integrated negative electrode column and the negative electrode cover plate.

[0008] Furthermore, the reinforcing ribs extend outward from the outer circumference of the circular boss along the radial direction of the adapter plate.

[0009] Furthermore, a circle of annular protrusions is provided on the upper outer side surface of the pole, and spaced arc grooves are provided on the outer side surface of the pole below the circle of annular protrusions, and the arc grooves are spaced apart by partition walls.

[0010] Furthermore, a center hole is provided in the center of the negative electrode cover plate, a countersunk hole is provided at the upper end of the center hole to form a step surface, and a plurality of grooves are provided on the step surface.

[0011] Furthermore, an explosion-proof valve is provided on the negative electrode cover plate.

[0012] Furthermore, the insulating seal includes a lower ring body, an upper ring body, a connecting portion arranged between the lower ring body and the upper ring body, and a center hole located in the center and cooperating with the integrated negative pole; a step surface is formed around the center hole at the upper end of the upper ring body, and the step surface cooperates with the lower surface of the annular protrusion on the pole; a plurality of block-shaped protrusions are formed on the lower part of the upper ring body and cooperate with the grooves on the negative pole cover plate.

[0013] Furthermore, an arc-shaped protrusion and a vertical groove are formed on the inner upper part of the insulating seal to respectively cooperate with the arc-shaped groove and the partition wall on the outer side of the pole.

[0014] Furthermore, a blind hole is formed in the center of the lower surface of the integrated negative electrode column.

[0015] Furthermore, a cylindrical protrusion matching the blind hole is formed in the center of the upper surface of the negative electrode current collector.

[0016] An energy storage capacitor comprises a shell, a battery cell, a negative electrode lead-out structure and a positive electrode lead-out mechanism; the battery cell is inserted in the shell, the top end of the battery cell is the negative electrode lead-out mechanism, and the bottom end is the positive electrode lead-out mechanism.

[0017] Compared with the prior art, the utility model has the following advantages and technical effects:

[0018] 1. The negative electrode lead-out structure of the utility model adopts an integrated negative electrode column, so that the electrode column and the adapter plate form an integrated structure, avoiding the assembly between the electrode column and the adapter plate, and improving the connection strength between the electrode column and the adapter plate.

[0019] 2. In the present invention, the insulating seal is formed between the integrated negative electrode column and the negative electrode cover by injection molding, which simplifies the insulating structure between the integrated negative electrode column and the negative electrode cover, reduces production costs, and improves assembly efficiency.

[0020] 3. In the present invention, a circumferential limiting structure is formed between the insulating seal and the integrated negative pole column and the negative pole cover plate, thereby preventing the insulating seal and the integrated negative pole column and the negative pole cover plate from rotating relative to each other, thereby ensuring the insulating sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the energy storage capacitor of the utility model;

[0023] Figure 2 It is a cross-sectional view of the energy storage capacitor of the utility model;

[0024] Figure 3 It is an exploded view of the negative electrode lead-out structure of the utility model;

[0025] Figure 4 It is a cross-sectional view of the negative electrode lead-out structure of the utility model.

[0026] Reference numerals in the figures:

[0027] Integrated negative electrode column 1, adapter plate 11, reinforcing rib 12, circular boss 13, arc groove 14, annular protrusion 15, pole 16, partition wall 17, blind hole 18, insulating seal 2, lower ring body 21, connecting part 22, upper ring body 23, vertical groove 24, first step surface 25, block protrusion 26, arc protrusion 27, negative electrode cover plate 3, second center hole 30, second step surface 31, groove 32, negative electrode collector 4, cylindrical protrusion 41, rubber plug 5, positive electrode cover plate 6, aluminum plug 7, positive electrode collector 8, battery cell 9, shell 10, explosion-proof valve 111. DETAILED DESCRIPTION

[0028] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0029] The following describes the implementation methods of the present invention through specific concrete examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The present invention can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the utility model, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0031] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0032] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0033] At the same time, in this specification, descriptions involving orientations, such as up, down, left, right, front, back, inside, outside, longitudinal, lateral, vertical, horizontal, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] Embodiment 1

[0035] like Figure 1-2 As shown, the energy storage capacitor of the utility model mainly includes a housing 10, a battery cell 9, a negative electrode lead-out structure and a positive electrode lead-out mechanism. The housing 10 is a cylindrical shape with a fully open top and a bottom surface, and a center hole is opened in the center of the bottom surface. The battery cell 9 is inserted in the housing 10, and the top end of the battery cell 9 is the negative electrode lead-out mechanism, and the bottom end is the positive electrode lead-out mechanism.

[0036] The negative electrode lead-out mechanism mainly includes an integrated negative electrode column 1, an insulating seal 2, a negative electrode cover 3 and a negative electrode current collector 4. The negative electrode cover 3 is arranged at the top opening of the housing 10, and a second center hole 30 is arranged at the center of the negative electrode cover 3. The integrated negative electrode column 1 passes through the second center hole 30 of the negative electrode cover 3. The insulating seal 2 is arranged in the second center hole 30 of the negative electrode cover 3, and the integrated negative electrode column 1 is insulated and separated from the negative electrode cover 3, and at the same time plays the role of sealing the internal space of the energy storage capacitor.

[0037] The positive electrode lead-out mechanism mainly includes a positive electrode cover plate 6, a positive electrode current collector 8, a rubber plug 5 and an aluminum plug 7. The positive electrode cover plate 6 is a circular aluminum disk with a through step hole in the center, which is used to fill the positive electrode electrolyte into the cavity in the center of the battery cell 9; the rubber plug 5 and the aluminum plug 7 are arranged in sequence from the inside to the outside in the step hole for sealing, and the aluminum plug 7 is fixed to the positive electrode cover plate 6 by welding. A boss is arranged outward at the center of the bottom surface of the positive electrode cover plate 6, and the boss is installed and matched with the center hole on the bottom surface of the shell 10. The upper surface of the positive electrode cover plate 6 is fixedly connected to the bottom end of the battery cell 9 through the positive electrode current collector 8.

[0038] like Figure 3As shown, the integrated negative pole 1 includes a pole 16 and an adapter plate 11, and the pole 16 and the adapter plate 11 are an integral structure. A circular boss 13 is provided at the center of the upper surface of the adapter plate 11, and a plurality of reinforcing ribs 12 are provided at intervals along the circumference of the circular boss 13, and the reinforcing ribs extend outward from the outer circumference of the circular boss 13 along the radial direction of the adapter plate 11. The pole 16 is provided on the upper surface of the circular boss 13 of the adapter plate, and a circle of annular protrusions 15 are provided on the upper outer side surface of the pole 16, and at the same time, spaced arc grooves 14 are provided on the outer side surface of the pole 16 below the circle of annular protrusions 15, and the arc grooves 14 are spaced apart by partition walls 17.

[0039] A second central hole 30 is provided in the center of the negative electrode cover plate 3, a countersunk hole is provided at the upper end of the second central hole 30 to form a second step surface 31, and a plurality of grooves 32 are provided on the second step surface 31. An explosion-proof valve 111 is also provided on the negative electrode cover plate 3.

[0040] like Figure 3 and 4 As shown, the insulating seal 2 is formed by injection molding between the integrated negative pole 1 and the negative pole cover 3, and includes a lower ring body 21, an upper ring body 23, a connecting portion 22 arranged between the lower ring body 21 and the upper ring body 23, and a first center hole 20 located in the center and matched with the integrated negative pole 1. A first step surface 25 is formed around the first center hole 20 at the upper end of the upper ring body 23, and the first step surface 25 is matched with the lower surface of the annular protrusion 15 on the pole 16; a plurality of block-shaped protrusions 26 are formed at the lower part of the upper ring body 23 to match with the grooves 32 on the negative pole cover 3; the grooves 32 and the block-shaped protrusions 26 are matched to form a circumferential limit structure to prevent relative rotation between the insulating seal 2 and the negative pole cover 3, thereby ensuring the insulating sealing performance. The upper inner portion of the insulating seal 2 is also formed with an arc-shaped protrusion 27 and a vertical groove 24 that respectively cooperate with the arc-shaped groove 14 and the partition wall 17 on the outer surface of the pole 16. Through the cooperation between the arc-shaped groove 14, the partition wall 17, the arc-shaped protrusion 27 and the vertical groove 24, a circumferential limiting structure is formed between the insulating seal 2 and the pole 16 to prevent relative rotation between the insulating seal 2 and the pole 16, thereby ensuring the insulating sealing performance.

[0041] like Figure 4 As shown, a blind hole 18 is formed in the center of the lower surface of the integrated negative electrode column 1 , and a cylindrical protrusion 41 matching with the blind hole 18 is formed in the center of the upper surface of the negative electrode current collecting sheet 4 .

[0042] The negative lead-out structure of the energy storage capacitor of the utility model adopts an integrated negative pole column 1, so that the pole column 16 and the adapter plate 11 form an integrated structure, avoiding the assembly between the pole column 16 and the adapter plate 11, and improving the connection strength between the pole column 16 and the adapter plate 11. The insulating seal 2 is formed by injection molding between the integrated negative pole column 1 and the negative pole cover plate 3, which simplifies the insulation structure between the integrated negative pole column 1 and the negative pole cover plate 3, reduces production costs, and improves assembly efficiency. A circumferential limiting structure is formed between the insulating seal 2 and the integrated negative pole column 1 and the negative pole cover plate 3, which prevents relative rotation between the insulating seal 2 and the integrated negative pole column 1 and the negative pole cover plate 3, thereby ensuring the insulating sealing performance.

[0043] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A negative electrode lead-out structure of an energy storage capacitor, comprising an integrated negative electrode column (1), an insulating seal (2), a negative electrode cover plate (3) and a negative electrode current collector (4); a second central hole (30) is arranged at the center of the negative electrode cover plate (3), the integrated negative electrode column (1) passes through the second central hole (30) of the negative electrode cover plate (3), and the insulating seal (2) is arranged in the second central hole (30) of the negative electrode cover plate (3) to insulate and separate the integrated negative electrode column (1) from the negative electrode cover plate (3); Features: The integrated negative pole (1) comprises a pole (16) and a transfer plate (11), wherein the pole (16) and the transfer plate (11) are an integrated structure; a circular boss (13) is arranged at the center of the upper surface of the transfer plate (11), and a plurality of reinforcing ribs (12) are arranged at intervals along the circumference of the circular boss (13); the pole (16) is arranged on the upper surface of the circular boss (13) of the transfer plate; The insulating seal (2) is formed between the integrated negative electrode column (1) and the negative electrode cover plate (3) by injection molding.

2. The negative electrode lead-out structure of the energy storage capacitor according to claim 1, characterized in that: The reinforcing rib (12) extends outward from the outer circumference of the circular boss (13) along the radial direction of the adapter plate (11).

3. The negative electrode lead-out structure of the energy storage capacitor according to claim 1, characterized in that: An annular protrusion (15) is arranged on the upper outer side surface of the pole (16), and spaced arc grooves (14) are arranged on the outer side surface of the pole (16) below the annular protrusion (15), and the arc grooves (14) are spaced apart by partition walls (17).

4. The negative electrode lead-out structure of the energy storage capacitor according to claim 3, characterized in that: A second central hole (30) is provided at the center of the negative electrode cover plate (3), a countersunk hole is provided at the upper end of the second central hole (30) to form a second step surface (31), and a plurality of grooves (32) are provided on the second step surface (31).

5. A negative electrode lead-out structure of an energy storage capacitor according to any one of claims 1 to 4, characterized in that: An explosion-proof valve (111) is provided on the negative electrode cover plate (3).

6. The negative electrode lead-out structure of the energy storage capacitor according to claim 4, characterized in that: The insulating seal (2) comprises a lower ring body (21), an upper ring body (23), a connecting portion (22) arranged between the lower ring body (21) and the upper ring body (23), and a first central hole (20) located at the center and matched with the integrated negative pole (1); a first step surface (25) is formed around the first central hole (20) at the upper end of the upper ring body (23), and the first step surface (25) is matched with the lower surface of the annular protrusion (15) on the pole (16); and a plurality of block-shaped protrusions (26) are formed at the lower part of the upper ring body (23) and are matched with the grooves (32) on the negative pole cover plate (3).

7. The negative electrode lead-out structure of the energy storage capacitor according to claim 6, characterized in that: The upper inner portion of the insulating seal (2) is also formed with an arc-shaped protrusion (27) and a vertical groove (24) respectively matching the arc-shaped groove (14) and the partition wall (17) on the outer side of the pole (16).

8. The negative electrode lead-out structure of the energy storage capacitor according to claim 1, characterized in that: A blind hole (18) is formed in the center of the lower surface of the integrated negative electrode column (1).

9. The negative electrode lead-out structure of the energy storage capacitor according to claim 1, characterized in that: A cylindrical protrusion (41) matching with the blind hole (18) is formed in the center of the upper surface of the negative electrode current collector (4).

10. An energy storage capacitor, comprising a housing (10), a battery cell (9), a negative electrode lead-out structure and a positive electrode lead-out mechanism; the housing (10) is provided with a battery cell (9), the top end of the battery cell (9) is the negative electrode lead-out mechanism, and the bottom end is the positive electrode lead-out mechanism; the characteristics are: The negative electrode lead-out structure is a negative electrode lead-out structure of an energy storage capacitor as described in any one of claims 1 to 9.

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