Preparation process of micro supercapacitor

Abstract

The application discloses a preparation process of a micro super capacitor. The micro super capacitor comprises a first single unit and a first negative pole column unit connectable with the first single unit. The first single unit comprises a first shell with a first accommodating cavity formed in the inside and a first positive pole column arranged in the first accommodating cavity. The outer wall of the first positive pole column is attached to the inner wall of the first accommodating cavity. The first negative pole column unit comprises a first negative pole column which can be embedded in the first positive pole column, a first diaphragm layer wrapped around the outer circumferential surface of the first negative pole column and a first sealing rubber ring sleeved on the upper end of the first negative pole column for sealing the first accommodating cavity. The application directly uses the electrode column and the shell as the current collector by limiting the structural design of the micro capacitor. The contact between the electrode material and the current collector is more compact by the unique electrode material coating, rolling and rolling methods. 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 application belongs to the field of supercapacitor preparation, and particularly relates to a preparation process of a micro supercapacitor. BACKGROUND

[0002] As a new high-level energy storage device, the supercapacitor has the high power characteristics of the traditional capacitor and the high energy characteristics of the battery. Due to its unique high specific power, large current discharge capacity, ultra-long temperature range characteristics, no discharge voltage platform, high reliability and green environmental protection, the supercapacitor is widely used and developed in many fields such as electric power, transportation, communication, energy and aviation.

[0003] The existing supercapacitor is greatly limited in size reduction due to the influence of structure, preparation process and manufacturing equipment. Especially for the mainstream supercapacitors on the market using organic electrolyte as the carrier fluid, and for the supercapacitors using solid electrolyte as the carrier fluid, there are many defects such as high manufacturing cost, limited ionic conductivity, poor mechanical strength, low working temperature range, limited contact area leading to low specific capacity, easy to break leading to short circuit of the capacitor, and so on. These are obstacles to the use of solid electrolyte to prepare supercapacitors. Compared with the supercapacitor system using organic electrolyte as the carrier fluid, the supercapacitor system using organic electrolyte as the carrier fluid has undergone decades of research and development, and has mature technology, stable performance and high cost performance. At the same time, the existing small cylindrical supercapacitors generally use a jack type lead-out method, which has limitations for user circuit board design, and the use voltage of a single supercapacitor is low. Usually, the supercapacitor unit needs to be connected in series after preparation to increase the rated voltage of the module supercapacitor. This method increases the welding, cutting, secondary packaging and other processes, increases the unqualified product rate and labor cost in the preparation, and increases the cost, which needs to be further improved. SUMMARY

[0004] The purpose of the application is to overcome the defects of the prior art and provide a preparation process of a micro supercapacitor.

[0005] The application adopts the following technical scheme:

[0006] A preparation process of a micro supercapacitor, the micro supercapacitor comprising a first monomer unit and a first negative pole column unit connectable with the first monomer unit,

[0007] The first monomer unit comprises a first shell with a first accommodating cavity formed inside and a first positive pole column arranged in the first accommodating cavity, and the outer wall of the first positive pole column is attached to the inner wall of the first accommodating cavity;

[0008] The first negative pole unit comprises a first negative pole capable of being embedded in the first positive pole, a first diaphragm layer wrapped around the outer circumferential surface of the first negative pole, and a first sealing rubber ring sleeved on the upper end of the first negative pole for sealing the first accommodating cavity, and a first positioning hole is formed in the first positive pole for embedding the first negative pole.

[0009] The preparation process thereof comprises the following steps:

[0010] In step one, the first negative pole is inserted into the prepared cellulose pulp, the cellulose pulp is uniformly adhered to the surface of the first negative pole, and the first diaphragm layer is formed by drying and shaping, then the first sealing rubber ring is fixed on the upper end of the first negative pole to obtain the first negative pole unit.

[0011] In step two, the first shell is placed horizontally, a plug with a through hole is used to plug the first accommodating cavity, then a positive electrode slurry is injected into the first accommodating cavity using a syringe, the first shell is rotated around its axis to make the positive electrode slurry uniformly coated on the inner wall of the first accommodating cavity and adhered and shaped, the plug is removed, and the positive electrode slurry is rolled and shaped using a positive electrode rolling device to make the first positive pole formed inside the first accommodating cavity to obtain the first monomer unit.

[0012] In step three, the electrolyte is injected into the first shell, then the first negative pole of the first negative pole unit is inserted into the first positioning hole of the first positive pole, and the first sealing rubber ring is clamped with the inner wall of the first accommodating cavity to obtain the micro super capacitor.

[0013] Further, the first negative pole comprises a first support portion capable of being supported on the upper end of the first shell, a first extension segment downwardly extending from the lower end of the first support portion, a first connecting pole downwardly extending from the lower end of the first extension segment and capable of being embedded in the first positioning hole, and a first negative electrode pole body wrapped around the outer circumferential surface of the first connecting pole, the first sealing rubber ring is sleeved on the outer circumferential surface of the first extension segment, and the first diaphragm layer is wrapped around the outer circumferential surface of the first negative electrode pole body.

[0014] Further, when the first negative pole is prepared, the first connecting pole is inserted into the negative electrode slurry to make the negative electrode slurry adhered to the first connecting pole, and the negative electrode slurry is firmly adhered to the outer circumferential surface of the first connecting pole by rotating, drying and rolling to form the first negative electrode pole body.

[0015] Further, the first sealing rubber ring comprises a first main segment capable of being embedded in the first accommodating cavity and a first limiting segment provided on the upper end of the first main segment and capable of being supported on the upper end of the first accommodating cavity, and the bottom surface of the first support portion is in contact with the top surface of the first limiting segment.

[0016] Further, the positive electrode rolling device comprises a fixed column which can be connected with the first shell and a rolling shaping column which can be movably arranged in the fixed column, the fixed column is formed with a moving cavity for the rolling shaping column to move back and forth, the front end of the rolling shaping column is formed with a shaping part, the diameter of the shaping part is the same as that of the first positioning hole, when the first positive electrode column is prepared, the fixed column is connected with the first shell, the rolling shaping column is moved in the direction of approaching the positive electrode paste so that the shaping part is inserted into the positive electrode paste, through repeated back and forth movement of the rolling shaping column, the positive electrode paste is solidified and formed in the accommodating cavity to obtain the first positive electrode column.

[0017] Further, the micro super capacitor further comprises a negative electrode lead-out end arranged at the upper end of the first negative electrode column and a positive electrode lead-out end arranged at the bottom of the first shell.

[0018] Further, the negative electrode lead-out end comprises a negative electrode positioning section arranged at the upper end of the first negative electrode column and a negative electrode connecting section extending outward from the side of the negative electrode positioning section, the positive electrode lead-out end comprises a positive electrode positioning section arranged at the bottom of the first shell and a positive electrode connecting section extending outward from the side of the positive electrode positioning section, the contact surfaces of the negative electrode connecting section and the positive electrode connecting section with the circuit board are both provided with a tinned layer, after the first sealing rubber ring is clamped with the inner wall of the accommodating cavity, the contact surfaces of the negative electrode connecting section and the positive electrode connecting section with the circuit board are tinned to form the tinned layer, thereby obtaining the micro super capacitor.

[0019] A preparation process of a micro super capacitor, the micro super capacitor comprises a first single unit, a first negative electrode column unit and a plurality of second single units spliced between the first single unit and the first negative electrode column unit,

[0020] The first single unit comprises a first shell with a first accommodating cavity formed inside and a first positive electrode column arranged in the first accommodating cavity, the outer wall of the first positive electrode column is attached to the inner wall of the first accommodating cavity;

[0021] The first negative electrode column unit comprises a first negative electrode column which can be embedded in the first positive electrode column, a first diaphragm layer which wraps around the outer periphery of the first negative electrode column and a first sealing rubber ring which is sleeved on the upper end of the first negative electrode column for sealing the first accommodating cavity, the first positive electrode column is formed with a first positioning hole for the first negative electrode column to be embedded;

[0022] The second single unit comprises a second shell with a second accommodating cavity formed inside, a second positive electrode column arranged in the second accommodating cavity, a second negative electrode column arranged at the bottom of the second shell and extending downward to be embedded in the first positioning hole or the second positive electrode column, a second diaphragm layer which wraps around the outer periphery of the second negative electrode column and a second sealing rubber ring which is 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, the second positive electrode column is formed with a second positioning hole for the first negative electrode column or the second negative electrode column to be embedded;

[0023] The preparation process thereof comprises the following steps:

[0024] Step one, insert the first negative pole into the prepared cellulose pulp, make the cellulose pulp evenly adhere to the surface of the first negative pole, and dry and shape to form the first diaphragm layer, then fix the first sealing rubber ring on the upper end of the first negative pole, get the first negative pole unit;

[0025] Step two, insert the second negative pole into the prepared cellulose pulp, make the cellulose pulp evenly adhere to the surface of the second negative pole, and dry and shape to form the second diaphragm layer, then fix the second sealing rubber ring on the upper end of the second negative pole;

[0026] Step three, lay the first shell and the second shell, plug the first containing cavity and the second containing cavity with the plug with a through hole formed inside, then use the syringe to inject the positive electrode slurry into the first containing cavity and the second containing cavity respectively, rotate the first shell and the second shell around the axis respectively, make the positive electrode slurry evenly coated on the inner wall of the containing cavity and adhere and shape, take down the plug, use the positive electrode rolling device to roll and shape the positive electrode slurry, make the first containing cavity and the second containing cavity respectively form the first positive pole or the second positive pole, get the first monomer unit and the second monomer unit;

[0027] Step four, inject the electrolyte into the first shell and the second shell, then insert the second negative pole of the second monomer unit into the first positioning hole of the first positive pole, make the second sealing rubber ring on the second negative pole clasp in the first containing cavity, and continue to stack the required number of second monomer units on the second monomer unit, in the stacking process, insert the second negative pole of the second monomer unit into the second positioning hole of the second positive pole, make the second sealing rubber ring clasp with the inner wall of the second containing cavity of the second shell located at the lower end; then insert the first negative pole of the first negative pole unit into the first positioning hole of the second positive pole located at the upper end, make the first sealing rubber ring clasp with the inner wall of the second containing cavity, get the micro super capacitor.

[0028] Further, the second negative pole comprises a second extension section extending downward from the bottom of the second shell, a second connecting pole arranged at the lower end of the second extension section and extending downward, and a second negative pole body wrapped around the outer periphery of the second connecting pole, and the second sealing rubber ring is sleeved on the outer periphery of the second extension section.

[0029] Further, the second extension section, the second connecting pole and the second shell are integrally formed.

[0030] From the above description of the present application, compared with the prior art, the beneficial effects of the present application are: by limiting the structure design of the micro capacitor, the coating process, slitting, punching, winding or patching process after batching in the preparation process of the super capacitor in the prior art is simplified, the electrode material is directly coated on the inner wall surface of the negative electrode column and the housing, a large number of process and working hours are saved, at the same time, conductive gel, aluminum foil, copper foil, adapter sheet 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 rolling method, the contact between the electrode material and the current collector is more compact, 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 high potential, it is more prone to chemical side reactions, which accelerates the aging of the material, so the positive electrode slurry is coated on the inner wall of the larger housing, the positive electrode column and the negative electrode column are wrapped in a scattering manner, more material aging loss space is reserved for the positive electrode column, the service life of the capacitor is greatly improved, at the same time, the structure is simplified, and it is easy to prepare a sealed electrolyte solid, liquid selectable micro super capacitor, realize more convenient internal series super capacitor, and improve the use voltage of the super capacitor;

[0031] In addition, by setting the negative electrode lead-out end on the upper end of the first negative electrode column and the positive electrode lead-out end on the bottom of the first housing, by adjusting the form of the lead-out end, it is more convenient to select the installation mode of the super capacitor plug-in type or patch type. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a structure schematic view of the first embodiment;

[0033] Figure 2 It is a structure sectional view of the first embodiment;

[0034] Figure 3 It is an exploded schematic view of the first embodiment;

[0035] Figure 4 It is a structure schematic view of the second embodiment;

[0036] Figure 5 It is a structure sectional view of the second embodiment;

[0037] Figure 6 It is a structure schematic view of the second single unit;

[0038] Figure 7 It is a structure schematic view of the third embodiment;

[0039] Figure 8 It is a structure sectional view of the third embodiment;

[0040] Figure 9 It is a preparation flow chart of the micro super capacitor of the first embodiment;

[0041] In the figure, 1-first monomer unit, 2-first negative pole unit, 3-second monomer unit, 4-negative electrode lead-out end, 5-positive electrode lead-out end, 6-positive electrode rolling device, 11-first shell, 111-first accommodating cavity, 12-first positive pole, 121-first positioning hole, 21-first negative pole, 211-first supporting part, 212-first extension section, 213-first connecting pole, 214-first negative electrode pole body, 22-first diaphragm layer, 23-first sealing rubber ring, 231-first main body section, 232-first limiting section, 31-second shell, 311-second accommodating cavity, 32-second positive pole, 321-second positioning hole, 33-second negative pole, 331-second extension section, 332-second connecting pole, 333-second negative electrode pole body, 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-fixing pole, 62-rolling shaping pole, 63-moving cavity, 64-shaping part. DETAILED DESCRIPTION

[0042] The application will be further described in the following specific embodiments.

[0043] Reference Figures 1 to 3 As shown in the figure, the first embodiment of the micro super capacitor comprises a first monomer unit 1 and a first negative pole unit 2 connected with the first monomer unit 1.

[0044] The first monomer unit 1 comprises a first shell 11 with a first accommodating cavity 111 formed inside and a first positive pole 12 arranged in the first accommodating cavity 111, specifically, the outer wall of the first positive pole 12 is attached to the inner wall of the first accommodating cavity 111.

[0045] The first negative pole unit 2 comprises a first negative pole 21 which can be embedded in the first positive pole 12, a first diaphragm layer 22 wrapped around the outer circumferential surface of the first negative pole 21 and a first sealing rubber ring 23 sleeved on the upper end of the first negative pole 21 for sealing the first accommodating cavity 111, correspondingly, the first positive pole 12 is internally formed with a first positioning hole 121 for embedding the first negative pole 21; specifically, the height of the first diaphragm layer 22 is consistent with the height of the first positive pole 12.

[0046] The first negative pole 21 comprises a first supporting part 211 which can be supported on the upper end of the first shell 11, a first extension section 212 which is arranged on the lower end of the first supporting part 211 and extends downward, a first connecting column 213 which is arranged on 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 body 214 which is 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 body 214; specifically, the diameter of the first connecting column 213 is smaller than the diameter of the first extension section 212; further, the first supporting part 211, the first extension section 212 and the first connecting column 213 are integrally formed.

[0047] The first sealing rubber ring 23 comprises a first main body section 231 which can be embedded in the first accommodating cavity 111 and a first limiting section 232 which is arranged on the upper end of the first main body section 231 and can be supported on the upper end of the first accommodating cavity 111, and when the first sealing rubber ring 23 is installed, the bottom surface of the first supporting part 211 is in contact with the top surface of the first limiting section 232; specifically, after the first sealing rubber ring 23 is installed, the bottom surface of the first main body section 231 is at a certain distance from the top surface of the first diaphragm layer 22 or the first positive pole 12, so that after the first sealing rubber ring 23 is installed, a space is left between the first sealing rubber ring 23, the first diaphragm layer 22 and the first positive pole 12, which makes the internal gas pressure of the capacitor more stable and avoids the decrease of the electrical performance caused by the increase of the internal gas pressure of the capacitor due to the gas produced by the decomposition of the electrolyte.

[0048] The preparation process thereof specifically comprises the following steps:

[0049] Step one, insert the first connecting column 213 into the negative electrode slurry, so that the negative electrode slurry adheres to the first connecting column 213, and after rotation, drying and rolling, the negative electrode slurry is firmly adhered to the outer periphery of the first connecting column 213 to form the first negative electrode column body 214, thereby obtaining the first negative pole 21;

[0050] Step two, insert the first negative pole 21 into the prepared cellulose pulp, so that the cellulose pulp is evenly adhered to the surface of the first negative pole 21, and then dry and shape to form the first diaphragm layer 22, and then fix the first sealing rubber ring 23 on the upper end of the first negative pole 21, thereby obtaining the first negative pole unit 2;

[0051] Step three, place the first shell 11 horizontally, plug the first accommodating cavity 111 with a plug having a through hole formed inside, then use a syringe to inject the positive electrode slurry into the first accommodating cavity 111, rotate the first shell 11 around its axis at a limited temperature, use the centrifugal force to make the positive electrode slurry evenly coated on the inner wall of the first accommodating cavity 111 and adhere to the shape, remove the plug, and use the positive electrode rolling device 6 to roll and shape the positive electrode slurry, so that the first accommodating cavity 111 is internally formed with the first positive pole 12, thereby obtaining the first monomer unit 1.

[0052] Step four, electrolyte is injected into the first shell 11, and then the first negative pole column unit 2 is inserted into the first positioning hole 121 of the first positive pole 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 super capacitor.

[0053] Among them, the negative electrode slurry, cellulose pulp, and positive electrode slurry are components commonly used in the field of super capacitor preparation. Since they are not the invention points of the present application, the raw material composition of their components will not be further described, 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 super capacitor. The flowability of the slurry can be adjusted by adjusting the solid content of the electrode slurry to increase or decrease the thickness of the electrode column attached to the inner wall of the accommodating cavity. When the flowability is high, the thickness of the electrode column attached to the connecting column and the inner wall of the accommodating cavity is thinner, and the size of the capacitor can be made smaller. Among them, the thinnest electrode column can reach the nanometer level of the raw material particles, and the capacitor diameter can reach 100um or less.

[0054] Referring to Figure 9 As shown in the figure, the positive electrode rolling device 6 includes a fixed column 61 that can be docked with the first shell 11 and a rolling and shaping column 62 that can be movably arranged in the fixed column 61. The fixed column 61 forms a moving cavity 63 for the rolling and shaping column 62 to move back and forth, and the front end of the rolling and shaping column 62 forms a shaping part 64, and the diameter of the shaping part 64 is the same as the diameter of the first positioning hole 121. Specifically, when the first positive pole column 12 is prepared, the fixed column 61 is docked with the first shell 11, and the rolling and shaping column 62 is moved in the direction close to the positive electrode slurry so that the shaping part 64 extends into the positive electrode slurry. Through the repeated back-and-forth movement of the rolling and shaping column 62, the positive electrode slurry is solidified and formed in the first accommodating cavity 111 to obtain the first positive pole column 12.

[0055] Referring to Figures 4 to 6 As shown in the figure, the second embodiment of the micro super capacitor includes a first monomer unit 1, a first negative pole column unit 2, and a plurality of second monomer units 3 spliced between the first monomer unit 1 and the first negative pole column unit 2.

[0056] Among them, the structure of the first monomer unit 1 and the first negative pole column unit 2 is the same as that of the first monomer unit and the first negative pole column unit in the first embodiment.

[0057] 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.

[0058] 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.

[0059] The preparation process specifically comprises the following steps:

[0060] 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.

[0061] 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.

[0062] 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;

[0063] 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;

[0064] Step five, lay the first shell 11, the second shell 31, respectively plug the first containing cavity 111 and the second containing cavity 311 with the plug with the through hole formed in the inside, then inject the positive electrode paste into the first containing cavity 111 and the second containing cavity 311 respectively using the syringe, rotate the first shell 11 and the second shell 31 around the axis thereof respectively under the limited temperature, make the positive electrode paste evenly coated on the inner wall of the containing cavity by the centrifugal effect, and adhere to the shape, remove the plug, and roll the positive electrode paste using the positive electrode rolling device to make the first containing cavity 111 and the second containing cavity 311 respectively form the first positive pole column 12 or the second positive pole column 32, obtain the first single unit 1 and the second single unit 3;

[0065] Step six, inject the electrolyte into the first shell 11 and the second shell 31, then insert the second negative pole column 33 of the second single unit 3 into the first positioning hole 121 of the first positive pole column 12, make the second sealing rubber ring 35 on the second negative pole column 33 engaged in the first containing cavity 111, and continue to stack the required number of the second single unit 3 on the second single unit 3, in the stacking process, insert the second negative pole column 33 of the second single unit 3 into the second positioning hole 321 of the second positive pole column 32, make the second sealing rubber ring 35 engaged with the inner wall of the second containing cavity 311 of the second shell 31 at the lower end; then insert the first negative pole column 21 of the first negative pole column unit 2 into the second positioning hole 321 of the second positive pole column 32 at the upper end, make the first sealing rubber ring 23 engaged with the inner wall of the second containing cavity 311, obtain the above-mentioned micro super capacitor.

[0066] Referring to Figures 7 to 8 Fig. 4, the third embodiment of the micro super capacitor includes the first single unit 1, the first negative pole column unit 2 connected with the first single unit 1, the negative pole lead-out end 4 arranged at the upper end of the first negative pole column unit 2, and the positive pole lead-out end 5 arranged at the bottom of the first single unit 1.

[0067] The structure of the first single unit 1 and the first negative pole column unit 2 is the same as that of the first single unit and the first negative pole column unit in the first embodiment.

[0068] The negative pole lead-out end 4 includes the negative pole positioning section 41 arranged at the upper end of the first negative pole column 21 and the negative pole connecting section 42 extending outward from the side of the negative pole positioning section 41, and specifically, the negative pole lead-out end 4, the first support part 211, the first extending section 212 and the first connecting column 213 are integrally formed.

[0069] The positive pole lead-out end 5 includes the positive pole positioning section 51 arranged at the bottom of the first shell 11 and the positive pole connecting section 52 extending outward from the side of the positive pole positioning section 51, and specifically, the positive pole lead-out end 5 is integrally formed with the first shell 11.

[0070] The preparation process specifically comprises the following steps:

[0071] Step one, insert the first connecting column 213 into the negative electrode slurry, make the negative electrode slurry adhere to the first connecting column 213, and after rotating, drying and rolling, make the negative electrode slurry firmly adhere to the outer periphery of the first connecting column 213 to form the first negative electrode column body 214, and obtain the first negative electrode column 21;

[0072] Step two, insert the first negative electrode column 21 into the prepared cellulose pulp, make the cellulose pulp uniformly adhere to the surface of the first negative electrode column 21, and dry and shape to form the first diaphragm layer 22, then fix the first sealing rubber ring 23 on the upper end of the first negative electrode column 21, and obtain the first negative electrode column unit 2;

[0073] Step three, place the first shell 1 horizontally, plug the first containing cavity 111 with a plug with a through hole formed inside, then use a syringe to inject the positive electrode slurry into the first containing cavity 111, rotate the first shell 11 around its axis at a limited temperature, use the centrifugal effect to make the positive electrode slurry uniformly coated on the inner wall of the first containing cavity 111 and adhere to shape, remove the plug, use the positive electrode rolling device 6 to roll and shape the positive electrode slurry, make the first containing cavity 111 internally shaped into the first positive electrode column 12, and obtain the first monomer unit 1;

[0074] Step four, inject the electrolyte into the first shell 11, then insert the first negative electrode column 21 of the first negative electrode column unit 2 into the first positioning hole 121 of the first positive electrode column 12, the first sealing rubber ring 23 is clamped with the inner wall of the first containing cavity 111, then tin is plated on the contact surface of the negative electrode connecting section 42, the positive electrode connecting section 52 and the circuit board to form a tin plating layer, and obtain the above-mentioned micro super capacitor.

[0075] By setting the negative electrode lead-out end 4 on the upper end of the first negative electrode column 21 and the positive electrode lead-out end 5 on the bottom of the first shell 11, and by adjusting the form of the lead-out end, it is more convenient to select the plug-in or patch type installation mode of the super capacitor.

[0076] The application simplifies the coating process, slitting, punching, winding or patching process after the preparation process of the super capacitor in the prior art by limiting the structural design of the micro capacitor, directly coats the electrode material on the inner wall surface of the negative electrode column and the accommodating cavity, greatly saves the process and working hours, and simultaneously, no longer uses conductive gel, aluminum foil, copper foil, adapter sheet and other materials, but directly uses the electrode column and the shell as the current collector, through the unique electrode material coating, rolling and rolling method, makes the contact between the electrode material and the current collector more compact, the material is uniform, the structure is firm, the process is simple, greatly reduces the internal resistance of the capacitor, and simultaneously, because the positive electrode is at a high potential, is more prone to chemical side reactions, accelerates the material aging, therefore, coats the positive electrode slurry on the inner wall of the larger shell, makes the positive electrode column and the negative electrode column into a scattering state, reserves more material aging and loss space for the positive electrode column, greatly improves the service life of the capacitor, simultaneously, simplifies the structure, is easy to prepare into a sealed electrolyte solid, liquid selectable micro super capacitor, realizes more convenient internal series type super capacitor, and improves the use voltage of the super capacitor.

[0077] The above is only the preferred embodiment of the application, and therefore cannot limit the scope of the application, that is, equivalent changes and modifications made according to the scope of the application and the content of the specification should still be within the scope of the application.

Claims

1. A process for the preparation of a micro-supercapacitor, characterized in that: The micro super capacitor comprises a first monomer unit and a first negative pole column unit connectable with the first monomer unit, The first monomer unit comprises a first shell with a first accommodating cavity formed inside and a first positive pole column arranged in the first accommodating cavity, and an outer wall of the first positive pole column is attached to an inner wall of the first accommodating cavity; The first negative pole column unit comprises a first negative pole column which can be embedded in the first positive pole column, a first diaphragm layer wrapped around an outer circumferential surface of the first negative pole column, and a first sealing rubber ring sleeved on an upper end of the first negative pole column for sealing the first accommodating cavity, and the first positive pole column is internally formed with a first positioning hole for embedding the first negative pole column; The preparation process of the micro super capacitor comprises the following steps: Step one, insert the first negative pole column into the prepared cellulose pulp, make the cellulose pulp uniformly adhere to the surface of the first negative pole column, and dry and shape the first diaphragm layer, then fix the first sealing rubber ring on the upper end of the first negative pole column to obtain the first negative pole column unit; Step two, place the first shell flat, plug the first accommodating cavity with a plug with a through hole formed inside, then use a syringe to inject the positive electrode slurry into the first accommodating cavity, rotate the first shell around its axis to make the positive electrode slurry uniformly coated on the inner wall of the first accommodating cavity and adhere and shape, remove the plug, and use the positive electrode rolling device to roll and shape the positive electrode slurry to make the first accommodating cavity internally formed with the first positive pole column to obtain the first monomer unit; Step three, inject the electrolyte into the first shell, then insert the first negative pole column of the first negative pole column unit into the first positioning hole of the first positive pole column, and the first sealing rubber ring is clamped with the inner wall of the first accommodating cavity to obtain the micro super capacitor.

2. The process for preparing a micro-supercapacitor according to claim 1, characterized in that: The first negative pole column comprises a first support portion which can be supported on the upper end of the first shell, a first extension section which is arranged at the lower end of the first support portion and extends downward, a first connecting column which 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 which is wrapped around the outer circumference of the first connecting column, and the first sealing rubber ring is sleeved around the outer circumference of the first extension section, and the first diaphragm layer is wrapped around the outer circumference of the first negative electrode column body.

3. The process for fabricating a micro-supercapacitor according to claim 2, wherein: When the first negative pole column is prepared, the first connecting column is inserted into the negative electrode slurry to make the negative electrode slurry adhere to the first connecting column, and after rotation, drying and rolling, the negative electrode slurry is firmly adhered to the outer circumference of the first connecting column to form the first negative electrode column body.

4. The process for fabricating a micro-supercapacitor according to claim 2, wherein: The first sealing rubber ring comprises a first main section which can be embedded in the first accommodating cavity and a first limiting section which is arranged at the upper end of the first main section and can be supported on the upper end of the first accommodating cavity, and the bottom surface of the first support portion is in contact with the top surface of the first limiting section.

5. The process for fabricating a micro-supercapacitor according to claim 1, wherein: The positive electrode rolling device comprises a fixed column which can be butted with the first shell and a rolling and shaping column which is movably arranged in the fixed column, the fixed column is formed with a moving cavity for back and forth movement of the rolling and shaping column, the front end of the rolling and shaping column is formed with a shaping portion, the diameter of the shaping portion is the same as the diameter of the first positioning hole, and when the first positive pole column is prepared, the fixed column is butted with the first shell, the rolling and shaping column moves in the direction close to the positive electrode slurry to make the shaping portion extend into the positive electrode slurry, and through repeated back and forth movement of the rolling and shaping column, the positive electrode slurry is solidified and shaped in the accommodating cavity to obtain the first positive pole column.

6. The process for fabricating a micro-supercapacitor of claim 1, wherein: The micro super capacitor further comprises a negative electrode lead-out end arranged at the upper end of the first negative electrode column and a positive electrode lead-out end arranged at the bottom of the first shell.

7. The process for fabricating a micro-supercapacitor according to claim 6, wherein: The negative electrode lead-out end comprises a negative electrode positioning section arranged at the upper end of the first negative electrode column and a negative electrode connecting section extending outward from the side of the negative electrode positioning section, and the positive electrode lead-out end comprises a positive electrode positioning section arranged at the bottom of the first shell and a positive electrode connecting section extending outward from the side of the positive electrode positioning section, and the contact surfaces of the negative electrode connecting section and the positive electrode connecting section with the circuit board are provided with a tin plating layer, and in step three, after the first sealing rubber ring is engaged with the inner wall of the accommodating cavity, the contact surfaces of the negative electrode connecting section and the positive electrode connecting section with the circuit board are plated with tin to form the tin plating layer, thereby obtaining the micro super capacitor.

8. A process for the preparation of a micro-supercapacitor, characterized in that: The micro super capacitor comprises a first single unit, a first negative electrode column unit and a plurality of second single units spliced between the first single unit and the first negative electrode column unit, The first single unit comprises a first shell with a first accommodating cavity formed inside and a first positive electrode column arranged in the first accommodating cavity, and the outer wall of the first positive electrode column is attached to the inner wall of the first accommodating cavity; The first negative electrode column unit comprises a first negative electrode column which can be embedded in the first positive electrode column, a first diaphragm layer wrapped around the outer periphery 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, and the first positive electrode column has a first positioning hole formed inside for embedding the first negative electrode column; The second single unit comprises a second shell with a second accommodating cavity formed inside, a second positive electrode column arranged in the second accommodating cavity, a second negative electrode column arranged at the bottom of the second shell and extending downward and capable of being embedded in the first positioning hole or the second positive electrode column, a second diaphragm layer wrapped around the outer periphery 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 the second positive electrode column has a second positioning hole formed inside for embedding the first negative electrode column or the second negative electrode column; The preparation process thereof comprises the following steps: Step one: inserting the first negative electrode column into the prepared cellulose pulp, allowing the cellulose pulp to uniformly adhere to the surface of the first negative electrode column, and drying and setting to form the first diaphragm layer, then fixing the first sealing rubber ring on the upper end of the first negative electrode column to obtain the first negative electrode column unit; Step two: inserting the second negative electrode column into the prepared cellulose pulp, allowing the cellulose pulp to uniformly adhere to the surface of the second negative electrode column, and drying and setting to form the second diaphragm layer, then fixing the second sealing rubber ring on the upper end of the second negative electrode column; Step three: placing the first shell and the second shell flat, plugging the first accommodating cavity and the second accommodating cavity with plugs with through holes formed inside, respectively, then using a syringe to inject positive electrode slurry into the first accommodating cavity and the second accommodating cavity, respectively, rotating the first shell and the second shell around their axes, respectively, to allow the positive electrode slurry to uniformly coat the inner wall of the accommodating cavity and adhere and set, removing the plugs, and using a positive electrode rolling device to roll and set the positive electrode slurry, so that the first accommodating cavity and the second accommodating cavity are respectively formed with the first positive electrode column or the second positive electrode column, thereby obtaining the first single unit and the second single unit; Step four, electrolyte is injected into the first shell and the second shell, and then the second negative pole column of the second monomer unit is inserted into the first positioning hole of the first positive pole column, so that the second sealing rubber ring on the second negative pole column is clamped in the first accommodating cavity, and the required number of second monomer units is continued to be stacked on the second monomer unit, in the stacking process, the second negative pole column of the second monomer unit is inserted into the second positioning hole of the second positive pole column, so that the second sealing rubber ring is clamped with the inner wall of the second accommodating cavity of the second shell located at the lower end; then the first negative pole column of the first negative pole column unit is inserted into the first positioning hole of the second positive pole column located at the upper end, so that the first sealing rubber ring is clamped with the inner wall of the second accommodating cavity, and the micro super capacitor is obtained.

9. The process for fabricating a micro-supercapacitor according to claim 8, wherein: The second negative pole column comprises a second extension section extending downward from the bottom of the second shell, a second connecting column extending downward arranged at the lower end of the second extension section, and a second negative electrode column body wrapped outside the second connecting column, and the second sealing rubber ring is sleeved outside the second extension section.

10. The process for fabricating a micro-supercapacitor according to claim 9, wherein: The second extension section, the second connecting column and the second shell are integrally formed.

Images