Core winding, method for preparing supercapacitor, and core winding production equipment

Abstract

The present invention discloses a method for preparing a core and a supercapacitor, and also discloses a core production device. By adopting the core preparation method provided by the present invention, the positive electrode sheet coil, the negative electrode sheet coil and the non-woven membrane coil are dried respectively before winding, and during the winding process, the non-woven membrane coil is also dried in real time, so that the moisture contained in the core formed by the final winding is greatly reduced, thereby ensuring the excellent performance of the core. By adopting the supercapacitor preparation method provided by the invention, the moisture in the supercapacitor can be reduced to the greatest extent. The core production device provided by the present invention can dry the non-woven membrane in real time during the winding process, reduce the moisture content of the non-woven membrane and the influence of the working environment, which is conducive to achieving continuous production, improving production efficiency and product qualification rate.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitor preparation methods and equipment, and in particular to a core preparation method, a supercapacitor preparation method, and core production equipment used in the above preparation methods. Background Art

[0002] Supercapacitors are widely used in automobile start-stop, pure electric or hybrid vehicles, wind power generation, elevators, smart instruments, military industry, aerospace and other fields due to their high power density, long cycle life, wide operating temperature range, maintenance-free, and green environmental protection.

[0003] The main raw material of supercapacitor electrodes is activated carbon, which has a specific surface area of ​​1500-2300m 2 / g, strong adsorption capacity, easy to absorb more water during the production process, which has a certain impact on the electrical performance and safety performance of the product; the non-woven fabric diaphragm used in supercapacitors has well-developed pores, and the original diaphragm water content before use is above 10000ppm, which has a certain contribution to the total water content of the battery core. Ignoring the moisture content of the diaphragm will affect the electrical performance of the supercapacitor to a certain extent, and may even cause safety problems for the supercapacitor.

[0004] The existing technical process in the industry is to dry the pole pieces and diaphragms after winding them into battery cells. However, the tightly stacked structure of the core is not conducive to the removal of moisture from the battery cells and the improvement of production efficiency, and the moisture content of the original diaphragm is not taken into account. During the manufacturing process, the diaphragm and the pole pieces containing activated carbon will also absorb more moisture. At present, the moisture content of the pole pieces in the supercapacitor core can quickly reach the standard. The industry generally only pays attention to the moisture problem of the pole pieces, but the capillary pores of the diaphragm itself will absorb moisture from the pole pieces and environmental moisture, which has a greater impact on the subsequent electrical performance. How to reduce the moisture content of the core, especially the moisture content of the non-woven diaphragm, is an industry problem. Summary of the invention

[0005] The technical problem to be solved by the present invention is that, in view of the above-mentioned shortcomings of the prior art, a method for preparing a winding core is provided, in which the positive electrode sheet, the negative electrode sheet and the non-woven membrane are dried separately before winding, and the non-woven membrane is dried in real time during the winding process, so that the moisture content of the winding core formed by the final winding is greatly reduced, thereby ensuring the excellent performance of the winding core. Furthermore, a method for preparing a supercapacitor is provided, which can reduce the moisture in the supercapacitor to the greatest extent. At the same time, the present invention also provides a winding core production equipment, which can dry the non-woven membrane in real time during the winding process, reduce the moisture content of the non-woven membrane and the influence of the working environment, and is conducive to achieving continuous production, improving production efficiency and product qualification rate.

[0006] In order to solve the above technical problems, the present invention provides a method for preparing a winding core for a supercapacitor, comprising the following steps:

[0007] Step S1, drying the rolled positive electrode sheet material, the negative electrode sheet material and the non-woven fabric separator material respectively;

[0008] Step S2: Winding the dried positive electrode sheet roll, the negative electrode sheet roll and the non-woven membrane roll together into a roll core, and during the winding process, the non-woven membrane roll is simultaneously dried.

[0009] By adopting the above technical scheme, the positive electrode sheet roll, the negative electrode sheet roll and the non-woven fabric diaphragm roll are dried separately before winding. Moreover, during the winding process, the non-woven fabric diaphragm roll is also dried in real time, so that the moisture content of the core formed by the final winding is greatly reduced, thereby ensuring the excellent performance of the core.

[0010] As a preferred embodiment of the method for preparing the core of the present invention, in step S1, the positive electrode sheet coil, the negative electrode sheet coil and the non-woven membrane coil are placed in a vacuum oven for drying respectively, the vacuum degree in the vacuum oven is greater than or equal to 0.09Mpa, the temperature is 100℃-190℃, and the drying time in the vacuum oven is 1-24 hours. In this way, the positive electrode sheet coil, the negative electrode sheet coil and the non-woven membrane coil are dried in a vacuum oven with a vacuum degree greater than or equal to 0.09Mpa and a temperature of 100℃-190℃ for 1-24 hours to ensure that the moisture in the positive electrode sheet coil, the negative electrode sheet coil and the non-woven membrane coil is removed.

[0011] As a preferred embodiment of the method for preparing the core of the present invention, step S2 includes: preparing a core production device, the core production device having a winding mechanism, a first feeding mechanism, a second feeding mechanism, a third feeding mechanism and a fourth feeding mechanism arranged around the winding mechanism, the core production device also having a first drying mechanism and a second drying mechanism, the first feeding mechanism and the second feeding mechanism being respectively arranged inside the first drying mechanism and the second drying mechanism; the non-woven fabric diaphragm roll is installed in the first feeding mechanism and the second feeding mechanism, and the free end of the non-woven fabric diaphragm roll is pulled to the winding mechanism; the positive electrode sheet roll is installed in the third feeding mechanism, and the free end of the positive electrode sheet roll is pulled to the winding mechanism; Pulling to the winding mechanism; installing the negative electrode sheet coil in the fourth feeding mechanism, and pulling the free end of the positive electrode sheet coil to the winding mechanism; starting the core production equipment, the first feeding mechanism and the second feeding mechanism respectively convey the non-woven membrane coil to the winding mechanism, the first drying mechanism and the second drying mechanism respectively dry the non-woven membrane coil on the first feeding mechanism and the second feeding mechanism in real time, the third feeding mechanism conveys the positive electrode sheet coil to the winding mechanism, the fourth feeding mechanism conveys the negative electrode sheet coil to the winding mechanism, and the winding mechanism winds the positive electrode sheet coil, the negative electrode sheet coil and the non-woven membrane coil into a core. More preferably, after starting the core production equipment, the first drying mechanism heats the non-woven membrane coil in the first feeding mechanism to 100℃-190℃, and the second drying mechanism heats the non-woven membrane coil in the second feeding mechanism to 100℃-190℃.

[0012] As a preferred embodiment of the method for preparing the winding core of the present invention, in the step S2, during the winding process, the positive electrode sheet and the negative electrode sheet are also dried synchronously.

[0013] More preferably, the step S2 comprises: preparing a core production equipment, the core production equipment having a winding mechanism, a first feeding mechanism, a second feeding mechanism, a third feeding mechanism and a fourth feeding mechanism arranged around the winding mechanism, the core production equipment also having a first drying mechanism, a second drying mechanism, a third drying mechanism and a fourth drying mechanism, the first feeding mechanism, the second feeding mechanism, the third feeding mechanism and the fourth feeding mechanism being respectively arranged inside the first drying mechanism, the second drying mechanism, the third drying mechanism and the fourth drying mechanism; installing the non-woven fabric diaphragm roll in the first feeding mechanism and the second feeding mechanism, and pulling the free end of the non-woven fabric diaphragm roll to the winding mechanism; installing the positive electrode sheet roll in the third feeding mechanism, and pulling the free end of the positive electrode sheet roll to the winding mechanism; The negative electrode sheet coil is installed in the feeding mechanism, and the free end of the positive electrode sheet coil is pulled to the winding mechanism; the core production equipment is started, the first feeding mechanism and the second feeding mechanism respectively convey the non-woven fabric diaphragm coil to the winding mechanism, the first drying mechanism and the second drying mechanism respectively heat and dry the non-woven fabric diaphragm coil on the first feeding mechanism and the second feeding mechanism in real time, the third drying mechanism heats and dries the positive electrode sheet coil on the third feeding mechanism, the fourth drying mechanism heats and dries the negative electrode sheet coil on the fourth feeding mechanism, the third feeding mechanism conveys the positive electrode sheet coil to the winding mechanism, the fourth feeding mechanism conveys the negative electrode sheet coil to the winding mechanism, and the winding mechanism winds the positive electrode sheet coil, the negative electrode sheet coil and the non-woven fabric diaphragm coil into a core together.

[0014] More preferably, after starting the core production equipment, the first drying mechanism heats the non-woven membrane roll in the first feeding mechanism to 100℃-190℃, the second drying mechanism heats the non-woven membrane roll in the second feeding mechanism to 100℃-190℃, the third drying mechanism heats the positive electrode sheet roll in the third feeding mechanism to 100℃-190℃, and the fourth drying mechanism heats the negative electrode sheet roll in the fourth feeding mechanism to 100℃-190℃.

[0015] The present invention also discloses a method for preparing a supercapacitor, which is characterized by comprising the following steps:

[0016] Prepare a roll core using the roll core preparation method described above;

[0017] Drying the core;

[0018] Welding a cover plate or a rubber plug for sealing on the roll core in a dry environment;

[0019] placing the core in a vacuum environment for air drying;

[0020] The winding core is placed in a shell in a dry environment, an electrolyte is injected into the shell, and the shell is sealed to obtain the supercapacitor.

[0021] By adopting the above technical solution, the moisture in the supercapacitor can be reduced to the greatest extent.

[0022] The present invention also discloses a core production device, which has a winding mechanism, a first feeding mechanism, a second feeding mechanism, a third feeding mechanism and a fourth feeding mechanism arranged around the winding mechanism, and the core production device also has a first drying mechanism and a second drying mechanism, and the first feeding mechanism and the second feeding mechanism are respectively placed inside the first drying mechanism and the second drying mechanism.

[0023] Compared with the existing winding equipment, the core production equipment can dry the non-woven membrane in real time during the winding process, reduce the moisture content of the non-woven membrane and the impact of the working environment, which is conducive to achieving continuous production, improving production efficiency and product qualification rate.

[0024] As an improvement of the core production equipment of the present invention, the core production equipment further comprises a third drying mechanism and a fourth drying mechanism, and the third feeding mechanism and the fourth feeding mechanism are respectively disposed inside the third drying mechanism and the fourth drying mechanism. Through the above improvements, the core production equipment can also dry the positive electrode sheet coil and the negative electrode sheet coil in real time during the winding process, thereby further reducing the moisture content of the final supercapacitor.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. By adopting the method for preparing the core provided by the present invention, the positive electrode sheet roll, the negative electrode sheet roll and the non-woven fabric diaphragm roll are dried separately before winding. Moreover, during the winding process, the non-woven fabric diaphragm roll is also dried in real time, so that the moisture content of the core finally formed by winding is greatly reduced, thereby ensuring the excellent performance of the core.

[0027] 2. By adopting the preparation method of the supercapacitor provided by the invention, the moisture in the supercapacitor can be reduced to the greatest extent.

[0028] 3. The core production equipment provided by the present invention can dry the non-woven membrane in real time during the winding process, reduce the moisture content of the non-woven membrane and the impact of the working environment, which is conducive to achieving continuous production and improving production efficiency and product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the first embodiment of the present invention;

[0030] Figure 2 FIG. 4 is a schematic structural diagram of a second embodiment of the present invention.

[0031] Description of the accompanying drawings in the specific implementation manner:

[0032] Main frame 1 control Panel 2 Winding mechanism 3 The first feeding mechanism 4 Second feeding mechanism 5 The third feeding mechanism 6 The fourth feeding mechanism 7 The first drying mechanism 8 Second drying mechanism 9 The third drying mechanism 10 Fourth drying mechanism 11 First Scroll 41 Second Scroll 51 The Third Scroll 61 The Fourth Scroll 71 Non-woven membrane rolls 100 Positive electrode coil 200 Negative electrode coil 300 DETAILED DESCRIPTION

[0033] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1

[0035] This embodiment provides a core production device, which can be used to efficiently produce cores for supercapacitors with extremely low moisture content.

[0036] like Figure 1 As shown, the core production equipment includes a main frame 1, a control panel 2 arranged on the upper side of the main frame 1, a winding mechanism 3, a first feeding mechanism 4, a second feeding mechanism 5, a third feeding mechanism 6, a fourth feeding mechanism 7, a first drying mechanism 8 and a second drying mechanism 9 installed on the main frame 1, and a controller electrically connected to the control panel 2, the first feeding mechanism 4, the second feeding mechanism 5, the third feeding mechanism 6, the fourth feeding mechanism 7, the first drying mechanism 8 and the second drying mechanism 9 respectively.

[0037] The winding mechanism 3 is arranged in the center of the main frame 1, the first feeding mechanism 4 and the second feeding mechanism 5 are respectively arranged on the front and rear sides of the winding mechanism 3, the third feeding mechanism 6 and the fourth feeding mechanism 7 are respectively arranged on the left and right sides of the winding mechanism 3, the first drying mechanism 8 is arranged on the outside of the first feeding mechanism 4 and accommodates the first feeding mechanism 4, and the second drying mechanism 9 is arranged on the outside of the second feeding mechanism 5 and accommodates the second feeding mechanism 5.

[0038] The first feeding mechanism 4 includes three first reels 41 and three first motors respectively linked to the three first reels 41, wherein two of the first reels 41 are arranged side by side, and another first reel 41 is arranged in front of the two first reels 41, and the first motor can drive the corresponding first reel 41 to rotate around its own central axis when it is running. When using the core production equipment, the user needs to set a non-woven membrane roll 100 on each of the three first reels 41, and pull the free end of one of the two non-woven membrane rolls 100 located at the rear side into the winding mechanism 3, and connect the free ends of the remaining two non-woven membrane rolls 100 for standby use.

[0039] The second feeding mechanism 5 includes three second reels 51 and three second motors respectively linked to the three third reels 61, wherein two of the second reels 51 are arranged side by side, and another second reel 51 is arranged at the rear of the two second reels 51. When the second motor is running, it can drive the corresponding second reel 51 to rotate around its own central axis. When using the core production equipment, the user needs to set a non-woven membrane roll 100 on each of the three second reels 51, and pull the free end of one of the two non-woven membrane rolls 100 at the rear into the winding mechanism 3, and connect the free ends of the remaining two non-woven membrane rolls 100 for standby use.

[0040] The third feeding mechanism 6 includes a third reel 61 and a third motor linked to the third reel 61. When the third motor is running, it can drive the third reel 61 to rotate around its own central axis. When using the winding core production equipment, the user needs to sleeve a positive electrode sheet coil 200 on the third reel 61 and pull the free end of the positive electrode sheet coil 200 into the winding mechanism 3.

[0041] The fourth feeding mechanism 7 includes a fourth reel 71 and a fourth motor linked to the fourth reel 71. When the fourth motor is running, it can drive the fourth reel 71 to rotate around its own central axis. When using the core production equipment, the user needs to sleeve a negative electrode sheet coil 300 on the fourth reel 71 and pull the free end of the negative electrode sheet coil 300 into the winding mechanism 3.

[0042] The first drying mechanism 8 includes a first shell cover, which accommodates the three first reels 41 so that the three first reels 41 are in a relatively sealed space. The first drying mechanism 8 also includes a first heating component arranged inside the first shell cover, which can be a resistance heating element, an infrared heating element, or a microwave heating element, and its function is to heat the temperature inside the first shell cover to a suitable temperature, for example, 100°C-190°C, so as to heat and dry the non-woven membrane winding inside the first shell cover. A first door for the non-woven membrane roll 100 to enter and exit is provided at one end of the first shell cover close to the winding mechanism 3. When the core production equipment is working, the first door needs to be opened so that the non-woven membrane roll 100 in the first shell cover can be connected to the winding mechanism 3. The first shell cover also has a first observation window made of transparent material for the non-woven roll to enter and exit. We can see the use of the non-woven membrane roll 100 inside the first shell cover through the first observation window, so as to change the material in time. During operation, the first observation window is closed to prevent the heat inside the first shell from dissipating, but the first observation window can be opened when the non-woven membrane roll 100 needs to be replaced. A first heat insulation layer formed of a heat insulation material is also provided on the inner side of the first shell to prevent the heat inside the first shell from dissipating to the outside.

[0043] The second drying mechanism 9 includes a second shell cover, which accommodates three second reels 51 so that the three second reels 51 are in a relatively sealed space. The second drying mechanism 9 also includes a second heating component arranged inside the second shell cover, which can be a resistance heating element, an infrared heating element, or a microwave heating element, and its function is to heat the temperature inside the second shell cover to a suitable temperature, for example, 100°C-190°C, so as to heat and dry the non-woven membrane winding inside the second shell cover. A second door is provided at one end of the second shell cover close to the winding mechanism 3 for the non-woven membrane roll 100 to enter and exit. When the core production equipment is working, the second door needs to be opened so that the non-woven membrane roll 100 in the second shell cover can be connected to the winding mechanism 3. The second shell cover also has a second observation window made of transparent material for the non-woven roll to enter and exit. We can see the use of the non-woven membrane roll 100 inside the second shell cover through the second observation window, so as to change the material in time. During operation, the second observation window is closed to prevent the heat inside the second shell from dissipating, but the second observation window can be opened when the non-woven membrane roll 100 needs to be replaced. A second heat insulation layer formed of a heat insulation material is also provided on the inner side of the second shell to prevent the heat inside the second shell from dissipating to the outside.

[0044] The controller may be a computer disposed at the bottom of the main frame 1. The user may input control instructions to the controller through the control panel 2, and the controller controls the winding mechanism 3, the first feeding mechanism 4, the second feeding mechanism 5, the third feeding mechanism 6, the fourth feeding mechanism 7, the first drying mechanism 8 and the second drying mechanism 9 according to the control instructions.

[0045] The method for producing a core using the core production equipment is described as follows.

[0046] Step S1, drying the rolled positive electrode sheet material 200, the negative electrode sheet material 300 and the non-woven fabric separator material 100 respectively. The specific implementation is as follows:

[0047] The positive electrode sheet roll 200, the negative electrode sheet roll 300 and the non-woven fabric diaphragm roll 100 are placed in a vacuum oven for drying respectively. The vacuum degree in the vacuum oven is greater than or equal to 0.09 MPa, the temperature is 100°C-190°C, and the drying time in the vacuum oven is 1-24 hours; high-purity nitrogen or high-purity argon is used for ventilation, and the ventilation frequency is once every 0.1 to 1 hour; the vacuum is released with high-purity inert gas, and after the temperature is reduced to near room temperature, the positive electrode sheet roll 200, the negative electrode sheet roll 300 and the non-woven fabric diaphragm roll 100 are taken out for use.

[0048] Step S2: Wind the dried positive electrode sheet coil 200, the negative electrode sheet coil 300 and the non-woven membrane coil 100 together into a coil core, and during the winding process, dry the non-woven membrane coil 100 simultaneously. The specific implementation is as follows:

[0049] A non-woven membrane roll 100 is respectively mounted on the three first reels 41, and the free end of one of the two non-woven membrane rolls 100 at the rear side is pulled into the winding mechanism 3, and the free ends of the remaining two non-woven membrane rolls 100 are connected for standby use.

[0050] A non-woven membrane roll 100 is respectively mounted on the three second reels 51, and the free end of one of the two non-woven membrane rolls 100 at the rear side is pulled into the winding mechanism 3, and the free ends of the remaining two non-woven membrane rolls 100 are connected for standby use.

[0051] A positive electrode sheet coil 200 is sleeved on the third reel 61 , and a free end of the positive electrode sheet coil 200 is pulled into the winding mechanism 3 .

[0052] A negative electrode sheet coil 300 is sleeved on the fourth reel 71 , and a free end of the negative electrode sheet coil 300 is pulled into the winding mechanism 3 .

[0053] The core production equipment is started through the control panel 2. Under the control of the controller, the first feeding mechanism 4 and the second feeding mechanism 5 respectively convey the non-woven membrane roll 100 to the winding mechanism 3. The first heating component of the first drying mechanism 8 and the second heating component of the second drying mechanism 9 respectively heat the internal temperature of the first feeding mechanism 4 and the second feeding mechanism 5 to 100°C-190°C, thereby heating and drying the non-woven membrane roll 100 on the first feeding mechanism 4 and the second feeding mechanism 5 in real time. The third feeding mechanism 6 conveys the positive electrode sheet roll 200 to the winding mechanism 3, and the fourth feeding mechanism 7 conveys the negative electrode sheet roll 300 to the winding mechanism 3. The winding mechanism 3 winds the positive electrode sheet roll 200, the negative electrode sheet roll 300 and the non-woven membrane roll 100 together into a core.

[0054] In this way, the positive electrode sheet roll 200, the negative electrode sheet roll 300 and the non-woven fabric diaphragm roll 100 are dried separately before winding, and the non-woven fabric diaphragm roll 100 is also dried in real time during the winding process, so that the moisture content of the core finally formed by winding is greatly reduced, thereby ensuring the excellent performance of the core.

[0055] Embodiment 2

[0056] This embodiment provides a core production device, which can be used to efficiently produce cores for supercapacitors with extremely low moisture content.

[0057] like Figure 2 As shown, the core production equipment includes a main frame 1, a control panel 2 arranged on the upper side of the main frame 1, a winding mechanism 3, a first feeding mechanism 4, a second feeding mechanism 5, a third feeding mechanism 6, a fourth feeding mechanism 7, a first drying mechanism 8, a second drying mechanism 9, a third drying mechanism 10 and a fourth drying mechanism 11 installed on the main frame 1, and a controller electrically connected to the control panel 2, the first feeding mechanism 4, the second feeding mechanism 5, the third feeding mechanism 6, the fourth feeding mechanism 7, the first drying mechanism 8, the second drying mechanism 9, the third drying mechanism 10 and the fourth drying mechanism 11 respectively.

[0058] The winding mechanism 3 is arranged in the center of the main frame 1, the first feeding mechanism 4 and the second feeding mechanism 5 are respectively arranged on the front and rear sides of the winding mechanism 3, the third feeding mechanism 6 and the fourth feeding mechanism 7 are respectively arranged on the left and right sides of the winding mechanism 3, the first drying mechanism 8 is arranged on the outside of the first feeding mechanism 4 and accommodates the first feeding mechanism 4, the second drying mechanism 9 is arranged on the outside of the second feeding mechanism 5 and accommodates the second feeding mechanism 5, the third drying mechanism 10 is arranged on the outside of the third feeding mechanism 6 and accommodates the third feeding mechanism 6, and the fourth drying mechanism 11 is arranged on the outside of the fourth feeding mechanism 7 and accommodates the fourth feeding mechanism 7.

[0059] The first feeding mechanism 4 includes three first reels 41 and three first motors respectively linked to the three first reels 41, wherein two of the first reels 41 are arranged side by side, and another first reel 41 is arranged in front of the two first reels 41, and the first motor can drive the corresponding first reel 41 to rotate around its own central axis when it is running. When using the core production equipment, the user needs to set a non-woven membrane roll 100 on each of the three first reels 41, and pull the free end of one of the two non-woven membrane rolls 100 located at the rear side into the winding mechanism 3, and connect the free ends of the remaining two non-woven membrane rolls 100 for standby use.

[0060] The second feeding mechanism 5 includes three second reels 51 and three second motors respectively linked to the three third reels 61, wherein two of the second reels 51 are arranged side by side, and another second reel 51 is arranged at the rear of the two second reels 51. When the second motor is running, it can drive the corresponding second reel 51 to rotate around its own central axis. When using the core production equipment, the user needs to set a non-woven membrane roll 100 on each of the three second reels 51, and pull the free end of one of the two non-woven membrane rolls 100 at the rear into the winding mechanism 3, and connect the free ends of the remaining two non-woven membrane rolls 100 for standby use.

[0061] The third feeding mechanism 6 includes three third reels 61 and three third motors respectively linked to the three third reels 61, wherein two third reels 61 are arranged side by side front and back, and another third reel 61 is arranged on the left side of the two third reels 61, and the third motor can drive the corresponding third reel 61 to rotate around its own central axis when it is running. When using the winding core production equipment, the user needs to set a positive electrode sheet coil 200 on each of the three third reels 61, and pull the free end of one of the two positive electrode sheet coils 200 on the right side into the winding mechanism 3, and connect the free ends of the remaining two positive electrode sheet coils 200 for standby use.

[0062] The fourth feeding mechanism 7 includes three fourth reels 71 and three fourth motors respectively linked to the three third reels 61, wherein two of the fourth reels 71 are arranged side by side, and another fourth reel 71 is arranged on the right side of the two fourth reels 71. When the fourth motor is running, it can drive the corresponding fourth reel 71 to rotate around its own central axis. When using the winding core production equipment, the user needs to set a negative electrode sheet coil 300 on each of the three fourth reels 71, and pull the free end of one of the two negative electrode sheet coils 300 on the left side into the winding mechanism 3, and connect the free ends of the remaining two negative electrode sheet coils 300 for standby use.

[0063] The first drying mechanism 8 includes a first shell cover, which accommodates the three first reels 41 so that the three first reels 41 are in a relatively sealed space. The first drying mechanism 8 also includes a first heating component arranged inside the first shell cover, which can be a resistance heating element, an infrared heating element, or a microwave heating element, and its function is to heat the temperature inside the first shell cover to a suitable temperature, for example, 100°C-190°C, so as to heat and dry the non-woven membrane winding inside the first shell cover. A first door for the non-woven membrane roll 100 to enter and exit is provided at one end of the first shell cover close to the winding mechanism 3. When the core production equipment is working, the first door needs to be opened so that the non-woven membrane roll 100 in the first shell cover can be connected to the winding mechanism 3. The first shell cover also has a first observation window made of transparent material for the non-woven roll to enter and exit. We can see the use of the non-woven membrane roll 100 inside the first shell cover through the first observation window, so as to change the material in time. During operation, the first observation window is closed to prevent the heat inside the first shell from dissipating, but the first observation window can be opened when the non-woven membrane roll 100 needs to be replaced. A first heat insulation layer formed of a heat insulation material is also provided on the inner side of the first shell to prevent the heat inside the first shell from dissipating to the outside.

[0064] The second drying mechanism 9 includes a second shell cover, which accommodates three second reels 51 so that the three second reels 51 are in a relatively sealed space. The second drying mechanism 9 also includes a second heating component arranged inside the second shell cover, which can be a resistance heating element, an infrared heating element, or a microwave heating element, and its function is to heat the temperature inside the second shell cover to a suitable temperature, for example, 100°C-190°C, so as to heat and dry the non-woven membrane winding inside the second shell cover. A second door is provided at one end of the second shell cover close to the winding mechanism 3 for the non-woven membrane roll 100 to enter and exit. When the core production equipment is working, the second door needs to be opened so that the non-woven membrane roll 100 in the second shell cover can be connected to the winding mechanism 3. The second shell cover also has a second observation window made of transparent material for the non-woven roll to enter and exit. We can see the use of the non-woven membrane roll 100 inside the second shell cover through the second observation window, so as to change the material in time. During operation, the second observation window is closed to prevent the heat inside the second shell from dissipating, but the second observation window can be opened when the non-woven membrane roll 100 needs to be replaced. A second heat insulation layer formed of a heat insulation material is also provided on the inner side of the second shell to prevent the heat inside the second shell from dissipating to the outside.

[0065] The third drying mechanism 10 includes a third shell cover, and the third shell cover accommodates the three third reels 61 so that the three third reels 61 are in a relatively sealed space. The third drying mechanism 10 also includes a third heating component arranged inside the third shell cover, and the third heating component can be a resistance heating element, an infrared heating element, or a microwave heating element, and its function is to heat the temperature inside the third shell cover to a suitable temperature, for example, 100°C-190°C, so as to heat and dry the positive electrode sheet coil 200 in the third shell cover. The end of the third shell cover close to the winding mechanism 3 is provided with a third door for the positive electrode sheet coil 200 to enter and exit. When the core production equipment is working, the third door needs to be opened so that the positive electrode sheet coil 200 in the third shell cover can be connected to the winding mechanism 3. The third shell cover also has a third observation window made of transparent material for the non-woven fabric coil to enter and exit. We can see the use of the positive electrode sheet coil 200 inside the third shell cover through the third observation window, so as to facilitate timely material replacement. During operation, the third observation window is closed to prevent the heat inside the third shell from dissipating, but the third observation window can be opened when it is necessary to replace the positive electrode sheet coil 200. A third heat insulation layer formed of a heat insulation material is also provided on the inner side of the third shell to prevent the heat inside the third shell from dissipating to the outside.

[0066] The fourth drying mechanism 11 includes a fourth shell cover, and the fourth shell cover accommodates the three fourth reels 71 so that the three fourth reels 71 are in a relatively sealed space. The fourth drying mechanism 11 also includes a fourth heating component arranged inside the fourth shell cover, and the fourth heating component can be a resistance heating element, an infrared heating element, or a microwave heating element, and its function is to heat the temperature inside the fourth shell cover to a suitable temperature, for example, 100°C-190°C, so as to heat and dry the negative electrode sheet coil 300 in the fourth shell cover. The fourth shell cover is provided with a fourth door for the negative electrode sheet coil 300 to enter and exit at one end close to the winding mechanism 3. When the core production equipment is working, the fourth door needs to be opened so that the negative electrode sheet coil 300 in the fourth shell cover can be connected to the winding mechanism 3. The fourth shell cover also has a fourth observation window made of transparent material for the non-woven fabric coil to enter and exit. We can see the use of the negative electrode sheet coil 300 inside the fourth shell cover through the fourth observation window, so as to facilitate timely material replacement. During operation, the fourth observation window is closed to prevent the heat inside the fourth shell from dissipating, but the fourth observation window can be opened when it is necessary to replace the negative electrode sheet coil 300. A fourth heat insulation layer formed of a heat insulation material is also provided on the inner side of the fourth shell to prevent the heat inside the fourth shell from dissipating to the outside.

[0067] The controller may be a computer disposed at the bottom of the main frame 1. The user may input control instructions to the controller through the control panel 2, and the controller controls the winding mechanism 3, the first feeding mechanism 4, the second feeding mechanism 5, the third feeding mechanism 6, the fourth feeding mechanism 7, the first drying mechanism 8 and the second drying mechanism 9 according to the control instructions.

[0068] The method for producing a core using the core production equipment is described as follows.

[0069] Step S1, drying the rolled positive electrode sheet material 200, the negative electrode sheet material 300 and the non-woven fabric separator material 100 respectively. The specific implementation is as follows:

[0070] The positive electrode sheet roll 200, the negative electrode sheet roll 300 and the non-woven fabric diaphragm roll 100 are placed in a vacuum oven for drying respectively. The vacuum degree in the vacuum oven is greater than or equal to 0.09 MPa, the temperature is 100°C-190°C, and the drying time in the vacuum oven is 1-24 hours; high-purity nitrogen or high-purity argon is used for ventilation, and the ventilation frequency is once every 0.1 to 1 hour; the vacuum is released with high-purity inert gas, and after the temperature is reduced to near room temperature, the positive electrode sheet roll 200, the negative electrode sheet roll 300 and the non-woven fabric diaphragm roll 100 are taken out for use.

[0071] Step S2: Wind the dried positive electrode sheet coil 200, the negative electrode sheet coil 300 and the non-woven membrane coil 100 together into a coil core, and during the winding process, dry the non-woven membrane coil 100 simultaneously. The specific implementation is as follows:

[0072] A non-woven membrane roll 100 is respectively mounted on the three first reels 41, and the free end of one of the two non-woven membrane rolls 100 at the rear side is pulled into the winding mechanism 3, and the free ends of the remaining two non-woven membrane rolls 100 are connected for standby use.

[0073] A non-woven membrane roll 100 is respectively mounted on the three second reels 51, and the free end of one of the two non-woven membrane rolls 100 at the rear side is pulled into the winding mechanism 3, and the free ends of the remaining two non-woven membrane rolls 100 are connected for standby use.

[0074] A positive electrode sheet roll 200 is respectively mounted on the three third reels 61 , and the free end of one of the two positive electrode sheet rolls 200 on the right is pulled into the winding mechanism 3 , and the free ends of the remaining two positive electrode sheet rolls 200 are connected for standby use.

[0075] A negative electrode sheet roll 300 is respectively mounted on the three fourth reels 71 , and the free end of one of the two negative electrode sheet rolls 300 on the left is pulled into the winding mechanism 3 , and the free ends of the remaining two negative electrode sheet rolls 300 are connected for standby use.

[0076] The core production equipment is started by the control panel 2. Under the control of the controller, the first feeding mechanism 4 and the second feeding mechanism 5 respectively convey the non-woven membrane roll 100 to the winding mechanism 3. The first heating component of the first drying mechanism 8, the second heating component of the second drying mechanism 9, the third heating component of the third drying mechanism 10 and the fourth heating component of the fourth heating mechanism respectively heat the internal temperatures of the first feeding mechanism 4, the second feeding mechanism 5, the third feeding mechanism 6 and the fourth feeding mechanism 7 to 100°C-190°C, thereby The non-woven fabric diaphragm roll 100 on the first feeding mechanism 4 and the second feeding mechanism 5 is heated and dried in real time, and the positive electrode sheet roll 200 in the third feeding mechanism 6 and the negative electrode sheet roll 300 in the fourth feeding mechanism 7 are also heated and dried in real time. The third feeding mechanism 6 conveys the positive electrode sheet roll 200 to the winding mechanism 3, and the fourth feeding mechanism 7 conveys the negative electrode sheet roll 300 to the winding mechanism 3. The winding mechanism 3 winds the positive electrode sheet roll 200, the negative electrode sheet roll 300 and the non-woven fabric diaphragm roll 100 together into a winding core.

[0077] In this way, the positive electrode sheet roll 200, the negative electrode sheet roll 300 and the non-woven fabric diaphragm roll 100 are dried separately before winding, and during the winding process, the non-woven fabric diaphragm roll 100, the positive electrode sheet roll 200 and the negative electrode sheet roll 300 are also dried in real time, so that the moisture content of the core finally formed by winding is greatly reduced, thereby ensuring the excellent performance of the core.

[0078] Embodiment 3

[0079] This embodiment provides a method for preparing a supercapacitor, comprising the following steps:

[0080] 1) The core production equipment provided in Example 1 or Example 2 is used to prepare the core. The specific operation method can be found in the relevant description in Example 1 or Example 2, which will not be repeated here. The obtained core can be cylindrical or square.

[0081] 2) Drying the core. Specifically, the wound core is placed in an oven for drying to remove moisture. The drying method is a combination of "blast + vacuum". The blast drying temperature is 100°C to 190°C, and the blast drying time is 1 to 24 hours. The vacuum drying temperature is 100°C to 190°C, and the drying time is 1 to 12 hours. High-purity nitrogen or argon is used for ventilation, and the ventilation frequency is once every 0.1 to 1 hour.

[0082] 3) Welding a sealing cover plate or rubber plug on the core in a dry environment. Specifically, the dried core is welded with a sealing cover plate or rubber plug in a drying room or glove box with a dew point of -70°C to -40°C and a humidity of ≤25%.

[0083] 4) The core is placed in a vacuum environment for air drying. Specifically, the core with the cover plate / rubber plug is dried again by "air + vacuum", the air drying temperature is 100-160°C, the air drying time is 1-24 hours; the vacuum drying temperature is 100-160°C, the drying time is 1-12 hours, and high-purity inert gas is used for ventilation, and the ventilation frequency is once every 0.1-1 hour.

[0084] 5) placing the winding core into a shell in a dry room or glove box with a dew point of -70°C to -40°C and a humidity of ≤25%, injecting electrolyte into the shell, and sealing the shell to obtain the supercapacitor.

[0085] In the above preparation method, each step dries the positive electrode sheet coil 200, the negative electrode sheet coil 300 and the non-woven fabric diaphragm coil 100, which greatly reduces the moisture content of the positive electrode sheet coil 200, the negative electrode sheet coil 300 and the non-woven fabric diaphragm coil 100, ensuring that the moisture content of the final supercapacitor is as low as the allowable value. In addition, the method uses the core production equipment provided in Example 1 or Example 2, which can realize automated continuous production, is simple to operate, and is conducive to improving the product qualification rate.

[0086] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, which all belong to the protection scope of the present invention.

Claims

1. A method for preparing a core, characterized in that: The steps include: Step S1, drying the rolled positive electrode sheet material, the negative electrode sheet material and the non-woven fabric separator material respectively; Step S2, winding the dried positive electrode sheet coil, the negative electrode sheet coil and the non-woven fabric separator coil together into a coil core, and during the winding process, the non-woven fabric separator coil is simultaneously dried; The step S2 comprises: Prepare a core production device, the core production device having a winding mechanism, a first feeding mechanism, a second feeding mechanism, a third feeding mechanism and a fourth feeding mechanism arranged around the winding mechanism, the core production device also having a first drying mechanism and a second drying mechanism, the first feeding mechanism and the second feeding mechanism being respectively placed inside the first drying mechanism and the second drying mechanism; The non-woven membrane roll is installed in both the first feeding mechanism and the second feeding mechanism, and the free end of the non-woven membrane roll is pulled to the winding mechanism; Installing the positive electrode sheet coil in the third feeding mechanism, and pulling the free end of the positive electrode sheet coil to the winding mechanism; Installing the negative electrode sheet coil in the fourth feeding mechanism, and pulling the free end of the negative electrode sheet coil to the winding mechanism; The core production equipment is started, the first feeding mechanism and the second feeding mechanism respectively convey the non-woven membrane roll to the winding mechanism, the first drying mechanism and the second drying mechanism respectively dry the non-woven membrane roll on the first feeding mechanism and the second feeding mechanism in real time, the third feeding mechanism conveys the positive electrode sheet roll to the winding mechanism, the fourth feeding mechanism conveys the negative electrode sheet roll to the winding mechanism, and the winding mechanism winds the positive electrode sheet roll, the negative electrode sheet roll and the non-woven membrane roll together into a core.

2. The method for preparing a winding core according to claim 1, characterized in that: In the step S1, the positive electrode sheet coil, the negative electrode sheet coil and the non-woven fabric diaphragm coil are placed in a vacuum oven for drying respectively. The vacuum degree in the vacuum oven is greater than or equal to 0.09 MPa, the temperature is 100° C.-190° C., and the drying time in the vacuum oven is 1-24 hours.

3. The method for preparing a winding core according to claim 1, characterized in that: After starting the core production equipment, the first drying mechanism heats the non-woven membrane roll in the first feeding mechanism to 100°C-190°C, and the second drying mechanism heats the non-woven membrane roll in the second feeding mechanism to 100°C-190°C.

4. The method for preparing a winding core according to claim 1, characterized in that: In the step S2, during the winding process, the positive electrode sheet coil and the negative electrode sheet coil are also dried synchronously, specifically: The core production equipment also has a third drying mechanism and a fourth drying mechanism, and the third feeding mechanism and the fourth feeding mechanism are respectively arranged inside the third drying mechanism and the fourth drying mechanism; After the first drying mechanism and the second drying mechanism respectively dry the non-woven fabric diaphragm roll on the first feeding mechanism and the second feeding mechanism in real time, it also includes: the third drying mechanism heats and dries the positive electrode sheet roll on the third feeding mechanism, and the fourth drying mechanism heats and dries the negative electrode sheet roll on the fourth feeding mechanism.

5. The method for preparing a winding core according to claim 4, characterized in that: After starting the core production equipment, the first drying mechanism heats the non-woven membrane roll in the first feeding mechanism to 100℃-190℃, the second drying mechanism heats the non-woven membrane roll in the second feeding mechanism to 100℃-190℃, the third drying mechanism heats the positive electrode sheet roll in the third feeding mechanism to 100℃-190℃, and the fourth drying mechanism heats the negative electrode sheet roll in the fourth feeding mechanism to 100℃-190℃.

6. A method for preparing a supercapacitor, characterized in that: The steps include: The core is prepared by the preparation method as claimed in claim 1; Drying the core; Welding a cover plate or a rubber plug for sealing on the roll core in a dry environment; placing the core in a vacuum environment for air drying; The winding core is placed in a shell in a dry environment, an electrolyte is injected into the shell, and the shell is sealed to obtain the supercapacitor.

7. A core production device based on the core preparation method of claim 1, characterized in that: The core production equipment has a winding mechanism, a first feeding mechanism, a second feeding mechanism, a third feeding mechanism and a fourth feeding mechanism arranged around the winding mechanism, and the core production equipment also has a first drying mechanism and a second drying mechanism, the first feeding mechanism and the second feeding mechanism are respectively arranged inside the first drying mechanism and the second drying mechanism; non-woven fabric diaphragm rolls are installed in the first feeding mechanism and the second feeding mechanism, and the free end of the non-woven fabric diaphragm roll is pulled to the winding mechanism; positive electrode sheet roll is installed in the third feeding mechanism, and the free end of the positive electrode sheet roll is pulled to the winding mechanism; negative electrode sheet roll is installed in the fourth feeding mechanism, and the free end of the negative electrode sheet roll is pulled to the winding mechanism.

8. The core production equipment according to claim 7, characterized in that: The core production equipment further comprises a third drying mechanism and a fourth drying mechanism, and the third feeding mechanism and the fourth feeding mechanism are respectively disposed inside the third drying mechanism and the fourth drying mechanism.

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