Miniature supercapacitor

Abstract

A miniature supercapacitor comprises a first monomer unit and a first negative pole unit capable of being connected with the first monomer unit, the first monomer unit comprises a first shell and a first positive pole, a first containing cavity is formed in the first shell, the first positive pole is arranged in the first containing cavity, and the outer wall of the first positive pole is attached to the inner wall of the first containing cavity; the first negative pole column unit comprises a first negative pole column capable of being embedded into the first positive pole column, a first diaphragm layer wrapping the peripheral surface of the first negative pole column and a first sealing rubber ring which sleeves the upper end of the first negative pole column and is used for sealing the first accommodating cavity, and a first positioning hole for embedding the first negative pole column is formed in the first positive pole column; by limiting the structural design of the miniature capacitor, the electrode column and the shell directly serve as the current collector, the contact between the electrode material and the current collector is more compact through unique electrode material coating, rolling and rolling modes, the material is uniform, the structure is firm, the process is simple, and the internal resistance of the capacitor is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the field of capacitor preparation, and particularly relates to a micro supercapacitor. Background Art

[0002] Supercapacitors, as an emerging advanced energy storage device, combine the high power characteristics of traditional capacitors with the high energy characteristics of batteries. Their unique high power density, high current discharge capability, extended temperature range, and zero discharge voltage plateau—all contributing to their high reliability and environmental friendliness—have led to their widespread application and development in numerous fields, including electricity, transportation, communications, energy, and aviation.

[0003] Existing supercapacitors, affected by their structure, manufacturing process, and manufacturing equipment, have significant limitations in reducing their size. This is especially true for the current mainstream supercapacitors on the market that use organic electrolytes as the carrier. For supercapacitors that use solid electrolytes as the carrier, due to their relatively immature technology, they have many drawbacks, such as high manufacturing costs, limited ionic conductivity, poor mechanical strength, low operating temperature range, limited contact area resulting in low specific capacity, and easy rupture that causes the capacitor to short-circuit. These are all obstacles to the use of solid electrolytes to prepare supercapacitors. In comparison, supercapacitor systems using organic electrolytes as the carrier have undergone decades of research and development and have mature processes, stable performance, and high cost-effectiveness. At the same time, existing small columnar supercapacitors generally use a jack-type lead-out method, which has its limitations in the design of user circuit boards. In addition, the operating voltage of a single supercapacitor is relatively low. Usually, after the supercapacitor unit is prepared, it is necessary to connect them in series to increase the rated voltage of the module supercapacitor. This method adds multiple processes such as welding, cutting leads, and secondary packaging, which increases the defective rate and labor during the manufacturing process, resulting in increased costs and needs further improvement. Summary of the Invention

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a micro supercapacitor.

[0005] The utility model adopts the following technical solutions:

[0006] A micro supercapacitor includes a first monomer unit and a first negative electrode column unit connectable to the first monomer unit.

[0007] The first monomer unit includes a first housing with a first accommodating cavity formed therein and a first positive electrode column disposed in the first accommodating cavity, wherein an outer wall of the first positive electrode column is in contact with an inner wall of the first accommodating cavity;

[0008] The first negative electrode column unit includes a first negative electrode column that can be embedded in the first positive electrode column, a first diaphragm layer wrapped around the outer circumference of the first negative electrode column, and a first sealing rubber ring sleeved on the upper end of the first negative electrode column for sealing the first accommodating cavity. A first positioning hole for embedding the first negative electrode column is formed inside the first positive electrode column.

[0009] Furthermore, the first negative electrode column includes a first supporting portion that can be supported at the upper end of the first outer shell, a first extension section that is arranged at the lower end of the first supporting portion and extends downward, a first connecting column that is arranged at the lower end of the first extension section and extends downward and can be embedded in the first positioning hole, and a first negative electrode column body wrapped around the outer periphery of the first connecting column, the first sealing rubber ring is arranged around the outer periphery of the first extension section, and the first diaphragm layer is wrapped around the outer periphery of the first negative electrode column.

[0010] Furthermore, the diameter of the first connecting column is smaller than the diameter of the first extending section.

[0011] Furthermore, the first sealing rubber ring includes a first main body section that can be embedded in the first accommodating cavity and a first limiting section arranged at the upper end of the first main body section and can be supported at the upper end of the first accommodating cavity, and the bottom surface of the first supporting portion is in contact with the top surface of the first limiting section.

[0012] Furthermore, it also includes a plurality of second monomer units spliced between the first monomer unit and the first negative electrode column unit, the second monomer unit including a second outer shell with a second accommodating cavity formed therein, a second positive electrode column arranged in the second accommodating cavity, a second negative electrode column arranged at the bottom of the second outer shell and extending downwardly and capable of being embedded in the first positioning hole or the second positive electrode column, a second diaphragm layer wrapped around the outer circumference of the second negative electrode column, and a second sealing rubber ring sleeved on the upper end of the second negative electrode column for sealing the second accommodating cavity or the upper end of the first accommodating cavity, and a second positioning hole for embedding the first negative electrode column or the second negative electrode column is formed inside the second positive electrode column.

[0013] Furthermore, the second negative electrode column includes a second extension section extending downward from the bottom of the second outer shell, a second connecting column extending downward from the lower end of the second extension section, and a second negative electrode column wrapped around the outer periphery of the second connecting column, and the second sealing rubber ring is arranged around the outer periphery of the second extension section.

[0014] Furthermore, the second extension section, the second connecting column and the second shell are integrally formed.

[0015] Furthermore, it also includes a negative electrode lead-out terminal arranged at the upper end of the first negative electrode column and a positive electrode lead-out terminal arranged at the bottom of the first shell.

[0016] Furthermore, the negative electrode lead-out terminal includes a negative electrode positioning segment arranged at the upper end of the first negative electrode column and a negative electrode connecting segment extending outward from the side of the negative electrode positioning segment, and the positive electrode lead-out terminal includes a positive electrode positioning segment arranged at the bottom of the first shell and a positive electrode connecting segment extending outward from the side of the positive electrode positioning segment.

[0017] Furthermore, the positive electrode lead-out terminal is integrally formed with the first shell.

[0018] From the above description of the utility model, it can be seen that compared with the prior art, the beneficial effects of the utility model are as follows: the present application simplifies the coating process, slitting, punching, winding or patching after the ingredients are mixed in the prior art supercapacitor preparation process by limiting the structural design of the microcapacitor, and directly coats the electrode material on the negative electrode column and the inner wall surface of the accommodating cavity, saving a lot of processes and working hours. At the same time, conductive gel, aluminum foil, copper foil, adapter and other materials are no longer used, but the electrode column and the shell are directly used as the current collector. Through the unique electrode material coating, rolling and grinding method, the electrode material and the current collector are The contact between the two electrodes is tighter, the material is uniform, the structure is firm, and the process is simple, which greatly reduces the internal resistance of the capacitor. Among them, because the positive electrode is at a high potential, it is more likely to produce chemical side reactions, which accelerates the aging of the material. Therefore, the positive electrode slurry is coated on the inner wall of the shell with a larger area, so that the positive electrode column and the negative electrode column are wrapped in a scattered shape, leaving more space for material aging and loss for the positive electrode column, greatly improving the service life of the capacitor. At the same time, the structure is simplified, and it is easy to prepare a sealed micro supercapacitor with a solid or liquid electrolyte, realizing a more convenient internal series supercapacitor and increasing the operating voltage of the supercapacitor.

[0019] In addition, by setting a negative lead-out terminal at the upper end of the first negative pole and a positive lead-out terminal at the bottom of the first shell, and by adjusting the lead-out terminal form, it is easier to choose a plug-in type or a patch type installation method for the supercapacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the first embodiment;

[0021] Figure 2 It is a structural cross-sectional view of the first embodiment;

[0022] Figure 3 It is an exploded schematic diagram of the first embodiment;

[0023] Figure 4 is a schematic structural diagram of the second embodiment;

[0024] Figure 5 is a structural cross-sectional view of the second embodiment;

[0025] Figure 6 is a schematic structural diagram of the second monomer unit;

[0026] Figure 7 is a structural diagram of the third embodiment;

[0027] Figure 8 is a structural cross-sectional view of a third embodiment;

[0028] Figure 9 This is a flow chart of the preparation of a micro supercapacitor according to the first embodiment;

[0029] In the figure, 1-first monomer unit, 2-first negative electrode column unit, 3-second monomer unit, 4-negative electrode lead-out terminal, 5-positive electrode lead-out terminal, 6-positive electrode rolling device, 11-first shell, 111-first accommodating cavity, 12-first positive electrode column, 121-first positioning hole, 21-first negative electrode column, 211-first supporting portion, 212-first extension section, 213-first connecting column, 214-first negative electrode column, 22-first diaphragm layer, 23-first sealing rubber ring, 231-first main body section, 232-first limiting section, 31-second outer shell, 311-second accommodating chamber, 32-second positive pole, 321-second positioning hole, 33-second negative pole, 331-second extension section, 332-second connecting pole, 333-second negative electrode column, 34-second diaphragm layer, 35-second sealing rubber ring, 41-negative pole positioning section, 42-negative pole connecting section, 51-positive pole positioning section, 52-positive pole connecting section, 61-fixed column, 62-rolling shaping column, 63-moving cavity, 64-shaping part. DETAILED DESCRIPTION

[0030] The present invention is further described below through specific implementation methods.

[0031] Reference Figures 1 to 3 As shown, the first embodiment of the micro supercapacitor includes a first monomer unit 1 and a first negative electrode column unit 2 connected to the first monomer unit 1 .

[0032] The first monomer unit 1 includes a first housing 11 with a first accommodating cavity 111 formed therein and a first positive electrode column 12 disposed in the first accommodating cavity 111 . Specifically, the outer wall of the first positive electrode column 12 is in contact with the inner wall of the first accommodating cavity 111 .

[0033] The first negative electrode column unit 2 includes a first negative electrode column 21 that can be embedded in the first positive electrode column 12, a first diaphragm layer 22 wrapped around the outer circumference of the first negative electrode column 21, and a first sealing rubber ring 23 sleeved on the upper end of the first negative electrode column 21 for sealing the first accommodating cavity 111. Correspondingly, a first positioning hole 121 for embedding the first negative electrode column 21 is formed inside the first positive electrode column 12; specifically, the height of the first diaphragm layer 22 is consistent with the height of the first positive electrode column 12.

[0034] The first negative electrode column 21 includes a first support portion 211 that can be supported at the upper end of the first shell 11, a first extension section 212 that is arranged at the lower end of the first support portion 211 and extends downward, a first connecting column 213 that is arranged at the lower end of the first extension section 212 and extends downward and can be embedded in the first positioning hole 121, and a first negative electrode column 214 wrapped around the outer periphery of the first connecting column 213, wherein the first sealing rubber ring 23 is sleeved on the outer periphery of the first extension section 212, and the first diaphragm layer 22 is wrapped around the outer periphery of the first negative electrode column 214; specifically, the diameter of the first connecting column 213 is smaller than the diameter of the first extension section 212; further, the first support portion 211, the first extension section 212 and the first connecting column 213 are integrally formed.

[0035] The first sealing rubber ring 23 includes a first main section 231 that can be embedded in the first accommodating cavity 111 and a first limiting section 232 that is arranged at the upper end of the first main section 231 and can support the upper end of the first accommodating cavity 111. When the first sealing rubber ring 23 is installed, the bottom surface of the first supporting portion 211 contacts the top surface of the first limiting section 232; specifically, after the first sealing rubber ring 23 is installed, there is a certain distance between the bottom surface of the first main section 231 and the first diaphragm layer 22 or the top surface of the first positive electrode column 12, so that after the first sealing rubber ring 23 is installed, there is space between the first diaphragm layer 22 and the first positive electrode column 12. This space makes the internal air pressure of the capacitor more stable, avoiding the reduction of electrical performance due to the increase of internal air pressure of the capacitor due to gas production due to decomposition of the electrolyte.

[0036] The preparation process specifically comprises the following steps:

[0037] Step 1: Insert the first connecting post 213 into the negative electrode slurry to make the negative electrode slurry adhere to the first connecting post 213. After rotating, drying, and rolling, the negative electrode slurry is firmly adhered to the outer periphery of the first connecting post 213 to form a first negative electrode column 214, thereby obtaining the first negative electrode column 21.

[0038] Step 2: Insert the first negative electrode column 21 into the prepared cellulose pulp, allow the cellulose pulp to evenly adhere to the surface of the first negative electrode column 21, dry and shape it to form a first separator layer 22, and then fix the first sealing rubber ring 23 to the upper end of the first negative electrode column 21 to obtain the first negative electrode column unit 2;

[0039] Step 3: Lay the first housing 11 flat, plug the first accommodating cavity 111 with a plug having a through hole formed therein, and then inject the positive electrode slurry into the first accommodating cavity 111 using a syringe. Rotate the first housing 11 around its axis at a predetermined temperature, and use centrifugal action to evenly coat the positive electrode slurry on the inner wall of the first accommodating cavity 111 and adhere to it to form a fixed shape. Remove the plug, and use the positive electrode rolling device 6 to roll and shape the positive electrode slurry, so that the first positive electrode column 12 is formed inside the first accommodating cavity 111, thereby obtaining the first monomer unit 1;

[0040] In step 4, the electrolyte is injected into the first shell 11, and then the first negative electrode column 21 of the first negative electrode column unit 2 is inserted into the first positioning hole 121 of the first positive electrode column 12, and the first sealing rubber ring 23 is engaged with the inner wall of the first accommodating cavity 111 to obtain the above-mentioned micro supercapacitor.

[0041] Among them, negative electrode slurry, cellulose pulp, and positive electrode slurry are commonly used components in the field of supercapacitor preparation. Since they are not the invention points of this application, the raw material composition of their components will not be further described here, and the specific parameters of the corresponding drying and shaping processes also refer to the existing process; specifically, the thickness of the negative electrode column and the positive electrode column determines the size of the micro supercapacitor, and the fluidity of the slurry can be increased or decreased by adjusting the solid content of the electrode slurry to adjust the thickness of the positive electrode and the negative electrode after forming. When the fluidity is high, the thinner the thickness of the electrode column attached to the connecting column and the inner wall of the accommodating cavity, the smaller the capacitor size can be. Among them, the thinnest electrode column can reach the nanoscale thickness of the raw material particles, and the capacitor diameter can reach 100um or less.

[0042] Reference Figure 9 As shown, the positive electrode rolling device 6 includes a fixed column 61 that can be docked with the first shell 11 and a rolling shaping column 62 that can be movably arranged in the fixed column 61, wherein the fixed column 61 is formed with a movable cavity 63 for the rolling shaping column 62 to move back and forth, and a shaping portion 64 is formed at the front end of the rolling shaping column 62, and the diameter of the shaping portion 64 is the same as the diameter of the first positioning hole 121; specifically, when the first positive electrode column 12 is prepared, the fixed column 61 is docked with the first shell 11, and the rolling shaping column 62 moves in a direction close to the positive electrode slurry so that the shaping portion 64 extends into the positive electrode slurry, and through the repeated back and forth movement of the rolling shaping column 62, the positive electrode slurry is solidified and formed in the first accommodating cavity 111, thereby obtaining the first positive electrode column 12.

[0043] Reference Figures 4 to 6 As shown, the second embodiment of the micro supercapacitor includes a first monomer unit 1 , a first negative electrode column unit 2 and a plurality of second monomer units 3 spliced between the first monomer unit 1 and the first negative electrode column unit 2 .

[0044] The structures of the first monomer unit 1 and the first negative electrode column unit 2 are the same as those of the first monomer unit and the first negative electrode column unit in the first embodiment.

[0045] The second monomer unit 2 includes a second outer shell 31 with a second accommodating cavity 311 formed therein, a second positive electrode column 32 arranged in the second accommodating cavity 311, a second negative electrode column 33 arranged at the bottom of the second outer shell 31 and extending downward to be embedded in the first positioning hole 121 or the second positive electrode column 32, a second diaphragm layer 34 wrapped around the outer circumference of the second negative electrode column 33, and a second sealing rubber ring 35 sleeved on the upper end of the second negative electrode column 33 for sealing the second accommodating cavity 311 or the upper end of the first accommodating cavity 111, wherein a second positioning hole 321 for embedding the first negative electrode column 21 or the second negative electrode column 33 is formed inside the second positive electrode column 32.

[0046] The second negative electrode column 33 includes a second extension section 331 extending downward from the bottom of the second outer shell 31, a second connecting column 332 extending downward from the lower end of the second extension section 331, and a second negative electrode column 333 wrapped around the outer periphery of the second connecting column 332, wherein the second sealing rubber ring 35 is sleeved on the outer periphery of the second extension section 331, and the structure is the same as that of the first sealing rubber ring 23; specifically, the second extension section 331, the second connecting column 332 and the second outer shell 31 are integrally formed.

[0047] The preparation process specifically comprises the following steps:

[0048] Step 1: Insert the first connecting post 213 into the negative electrode slurry to make the negative electrode slurry adhere to the first connecting post 213. After rotating, drying, and rolling, the negative electrode slurry is firmly adhered to the outer periphery of the first connecting post 213 to form a first negative electrode column 214, thereby obtaining the first negative electrode column 21.

[0049] Step 2: Insert the second connecting post 332 into the negative electrode slurry to make the negative electrode slurry adhere to the second connecting post 332. After rotating, drying, and rolling, the negative electrode slurry is firmly adhered to the outer periphery of the second connecting post 332 to form a second negative electrode column 333, thereby obtaining a second negative electrode column 33.

[0050] Step 3: Insert the first negative electrode column 21 into the prepared cellulose pulp, allow the cellulose pulp to evenly adhere to the surface of the first negative electrode column, dry and shape it to form a first separator layer 22, and then fix the first sealing rubber ring 23 to the upper end of the first negative electrode column 21 to obtain the first negative electrode column unit 2;

[0051] Step 4: Insert the second negative electrode column 33 into the prepared cellulose pulp, allow the cellulose pulp to evenly adhere to the surface of the second negative electrode column 33, dry and shape it to form a second separator layer 34, and then fix the second sealing rubber ring 35 on the upper end of the second negative electrode column 33;

[0052] Step 5: Lay the first housing 11 and the second housing 31 flat, plug the first accommodating cavity 111 and the second accommodating cavity 311 with plugs having through holes therein, and then inject the positive electrode slurry into the first accommodating cavity 111 and the second accommodating cavity 311 respectively using a syringe. Rotate the first housing 11 and the second housing 31 around their axes at a predetermined temperature, and use centrifugal action to evenly coat the positive electrode slurry on the inner walls of the accommodating cavities and adhere to them to form a fixed shape. Remove the plugs, and use a positive electrode rolling device to roll and shape the positive electrode slurry, so that the first positive electrode column 12 or the second positive electrode column 32 is formed in the first accommodating cavity 111 and the second accommodating cavity 311, respectively, to obtain the first monomer unit 1 and the second monomer unit 3;

[0053] Step six, injecting the electrolyte into the first shell 11 and the second shell 31, then inserting the second negative electrode post 33 of the second monomer unit 3 into the first positioning hole 121 of the first positive electrode post 12, so that the second sealing rubber ring 35 on the second negative electrode post 33 is engaged in the first accommodating cavity 111, and continuing to stack the required number of second monomer units 3 on the second monomer unit 3. During the stacking process, the second negative electrode post 33 of the second monomer unit 3 is inserted into the second positioning hole 321 of the second positive electrode post 32, so that the second sealing rubber ring 35 is engaged with the inner wall of the second accommodating cavity 311 of the second shell 31 at the lower end; then, the first negative electrode post 21 of the first negative electrode post unit 2 is inserted into the second positioning hole 321 of the second positive electrode post 32 at the upper end, so that the first sealing rubber ring 23 is engaged with the inner wall of the second accommodating cavity 311, and the above-mentioned micro supercapacitor is obtained.

[0054] Reference Figures 7 and 8 As shown, the third embodiment of the micro supercapacitor includes a first monomer unit 1, a first negative electrode column unit 2 connected to the first monomer unit 1, a negative electrode lead-out terminal 4 arranged at the upper end of the first negative electrode column unit 2, and a positive electrode lead-out terminal 5 arranged at the bottom of the first monomer unit 1.

[0055] The structures of the first monomer unit 1 and the first negative electrode column unit 2 are the same as those of the first monomer unit and the first negative electrode column unit in the first embodiment.

[0056] The negative electrode lead-out terminal 4 includes a negative electrode positioning segment 41 arranged at the upper end of the first negative electrode column 21 and a negative electrode connecting segment 42 extending outward from the side of the negative electrode positioning segment 41. Specifically, the negative electrode lead-out terminal 4, the first support portion 211, the first extension segment 212 and the first connecting column 213 are integrally formed.

[0057] The positive electrode lead-out terminal 5 includes a positive electrode positioning segment 51 provided at the bottom of the first housing 11 and a positive electrode connecting segment 52 extending outward from the side of the positive electrode positioning segment 51 . Specifically, the positive electrode lead-out terminal 5 is integrally formed with the first housing 11 .

[0058] The preparation process specifically comprises the following steps:

[0059] Step 1: Insert the first connecting post 213 into the negative electrode slurry to make the negative electrode slurry adhere to the first connecting post 213. After rotating, drying, and rolling, the negative electrode slurry is firmly adhered to the outer periphery of the first connecting post 213 to form a first negative electrode column 214, thereby obtaining the first negative electrode column 21.

[0060] Step 2: Insert the first negative electrode column 21 into the prepared cellulose pulp, allow the cellulose pulp to evenly adhere to the surface of the first negative electrode column 21, dry and shape it to form a first separator layer 22, and then fix the first sealing rubber ring 23 to the upper end of the first negative electrode column 21 to obtain the first negative electrode column unit 2;

[0061] Step 3: Lay the first housing 1 flat, plug the first accommodating cavity 111 with a plug having a through hole formed therein, then inject the positive electrode slurry into the first accommodating cavity 111 using a syringe, rotate the first housing 11 around its axis at a defined temperature, and use centrifugal action to evenly coat the positive electrode slurry on the inner wall of the first accommodating cavity 111 and adhere to it to form a fixed shape. Remove the plug, and use the positive electrode rolling device 6 to roll and shape the positive electrode slurry, so that the first positive electrode column 12 is formed inside the first accommodating cavity 111, thereby obtaining the first monomer unit 1;

[0062] In step 4, the electrolyte is injected into the first shell 11, and then the first negative electrode column 21 of the first negative electrode column unit 2 is inserted into the first positioning hole 121 of the first positive electrode column 12. The first sealing rubber ring 23 is engaged with the inner wall of the first accommodating cavity 111. Then, tin is plated on the contact surface between the negative electrode connecting section 42, the positive electrode connecting section 52 and the circuit board to form a tin plating layer to obtain the above-mentioned micro supercapacitor.

[0063] By arranging a negative electrode lead-out terminal 4 at the upper end of the first negative electrode column 21 and a positive electrode lead-out terminal 5 at the bottom of the first shell 11, and adjusting the lead-out terminal form, it is more convenient to select a plug-in type or a patch type installation method for the supercapacitor.

[0064] The present application simplifies the coating process, slitting, punching, winding or patching after the ingredients are mixed in the prior art supercapacitor preparation process by limiting the structural design of the microcapacitor, and directly coats the electrode material on the surface of the negative electrode column and the inner wall of the accommodating cavity, thereby saving a large number of processes and working hours. At the same time, conductive gel, aluminum foil, copper foil, adapter sheet and other materials are no longer used. Instead, the electrode column and the shell are directly used as current collectors. Through the unique electrode material coating, rolling and rolling method, the contact between the electrode material and the current collector is made tighter, the material is uniform, the structure is firm, the process is simple, and the internal resistance of the capacitor is greatly reduced. Among them, because the positive electrode is at a high potential, it is more likely to produce chemical side reactions, which accelerates the aging of the material. Therefore, the positive electrode slurry is coated on the inner wall of the shell with a larger area, so that the positive electrode column and the negative electrode column are scattered and wrapped, leaving more space for material aging and loss for the positive electrode column, greatly improving the service life of the capacitor. At the same time, the structure is simplified, and it is easy to prepare a sealed micro supercapacitor with a solid or liquid selectable electrolyte, realizing a more convenient internal series supercapacitor and increasing the operating voltage of the supercapacitor.

[0065] The above description is merely a preferred embodiment of the present invention and therefore cannot be used to limit the scope of implementation of the present invention. In other words, equivalent changes and modifications made according to the scope of application of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A micro supercapacitor, characterized in that: comprising a first monomer unit and a first negative electrode column unit connectable to the first monomer unit, The first monomer unit includes a first housing with a first accommodating cavity formed therein and a first positive electrode column disposed in the first accommodating cavity, wherein an outer wall of the first positive electrode column is in contact with an inner wall of the first accommodating cavity; The first negative electrode column unit includes a first negative electrode column that can be embedded in the first positive electrode column, a first diaphragm layer wrapped around the outer circumference of the first negative electrode column, and a first sealing rubber ring sleeved on the upper end of the first negative electrode column for sealing the first accommodating cavity. A first positioning hole for embedding the first negative electrode column is formed inside the first positive electrode column.

2. A micro supercapacitor according to claim 1, characterized in that: The first negative electrode column includes a first supporting portion that can be supported at the upper end of the first outer shell, a first extension section that is arranged at the lower end of the first supporting portion and extends downward, a first connecting column that is arranged at the lower end of the first extension section and extends downward and can be embedded in the first positioning hole, and a first negative electrode column wrapped around the outer periphery of the first connecting column, the first sealing rubber ring is arranged around the outer periphery of the first extension section, and the first diaphragm layer is wrapped around the outer periphery of the first negative electrode column.

3. A micro supercapacitor according to claim 2, characterized in that: The diameter of the first connecting column is smaller than the diameter of the first extending section.

4. The micro supercapacitor according to claim 2, characterized in that: The first sealing rubber ring includes a first main body section that can be embedded in the first accommodating cavity and a first limiting section arranged at the upper end of the first main body section and can support the upper end of the first accommodating cavity, and the bottom surface of the first supporting portion contacts the top surface of the first limiting section.

5. The micro supercapacitor according to claim 1, characterized in that: It also includes a plurality of second monomer units spliced between the first monomer unit and the first negative electrode column unit, the second monomer unit including a second outer shell with a second accommodating cavity formed therein, a second positive electrode column arranged in the second accommodating cavity, a second negative electrode column arranged at the bottom of the second outer shell and extending downwardly and capable of being embedded in the first positioning hole or the second positive electrode column, a second diaphragm layer wrapped around the outer circumference of the second negative electrode column, and a second sealing rubber ring sleeved on the upper end of the second negative electrode column for sealing the second accommodating cavity or the upper end of the first accommodating cavity, and a second positioning hole for embedding the first negative electrode column or the second negative electrode column is formed inside the second positive electrode column.

6. The micro supercapacitor according to claim 5, characterized in that: The second negative electrode column includes a second extension section extending downward from the bottom of the second shell, a second connecting column extending downward from the lower end of the second extension section, and a second negative electrode column wrapped around the outer periphery of the second connecting column, and the second sealing rubber ring is arranged around the outer periphery of the second extension section.

7. The micro supercapacitor according to claim 6, characterized in that: The second extension section, the second connecting column and the second shell are integrally formed.

8. The micro supercapacitor according to claim 1, characterized in that: It also includes a negative electrode lead-out terminal arranged at the upper end of the first negative electrode column and a positive electrode lead-out terminal arranged at the bottom of the first shell.

9. The micro supercapacitor according to claim 8, characterized in that: The negative electrode lead-out terminal includes a negative electrode positioning segment arranged at the upper end of the first negative electrode column and a negative electrode connecting segment extending outward from the side of the negative electrode positioning segment. The positive electrode lead-out terminal includes a positive electrode positioning segment arranged at the bottom of the first shell and a positive electrode connecting segment extending outward from the side of the positive electrode positioning segment.

10. The micro supercapacitor according to claim 8, characterized in that: The positive electrode lead-out terminal is integrally formed with the first shell.

Images