KR102580194B1 - Electrode plate manufacturing method for lead-acid battery with increased active material adhesion and improved electrical conductivity by applying a conductive paste nonwoven fabric with added graphite - Google Patents

Abstract

The present invention relates to a method of manufacturing an electrode plate for a lead acid battery that increases adhesion to active materials and improves electrical conductivity by applying a conductive paste nonwoven fabric to which graphite has been added. More specifically, a conductive paste to which irregularly sized graphite particles have been added is applied to the surface of the nonwoven fabric. By manufacturing a lead-acid battery by including an electrode plate attached by pressing the non-woven fabric produced by dipping to the surface of the active material applied to the grid, the electrical conductivity of the lead-acid battery and the adhesion of the active material are improved, thereby improving the basic performance (CCA) of the lead-acid battery. ) It relates to a method of manufacturing electrode plates for lead acid batteries that increases active material adhesion and improves electrical conductivity by applying a conductive paste non-woven fabric with added graphite, which can improve the lifespan and early end of life.
Through the present invention, by using a conductive paste nonwoven fabric to which graphite is added, the effect of improving the basic performance (CCA) of a lead acid battery and early end of life by improving electrical conductivity is provided.

Description

Electrode plate manufacturing method for lead-acid battery with increased active material adhesion and improved electrical conductivity by applying a conductive paste nonwoven fabric with added graphite}

The present invention relates to a method of manufacturing an electrode plate for a lead acid battery that increases adhesion to active materials and improves electrical conductivity by applying a conductive paste nonwoven fabric to which graphite has been added. More specifically, a conductive paste to which irregularly sized graphite particles have been added is applied to the surface of the nonwoven fabric. By manufacturing a lead-acid battery by including an electrode plate attached by pressing the non-woven fabric produced by dipping to the surface of the active material applied to the grid, the electrical conductivity of the lead-acid battery and the adhesion of the active material are improved, thereby improving the basic performance (CCA) of the lead-acid battery. ) It relates to a method of manufacturing electrode plates for lead acid batteries that increases active material adhesion and improves electrical conductivity by applying a conductive paste non-woven fabric with added graphite, which can improve the lifespan and early end of life.

Currently, the lead acid battery active material mechanism adds polyester-based fiber to the active material to secure physical strength and a surface area for reaction with sulfuric acid.

Typically, polyester-based fibers with a fineness of 0.8 to 5 denier and a length of 1 to 10 mm are added to the lead acid battery active material, and these fibers have excellent acid resistance and oxidation resistance.

At this time, the organic synthetic short fibers added typically have a circular cross-section and are about 2 to 10 mm in length.

The ingredients of organic synthetic short fibers are mainly polypropylene, polyester, and modacrylic, which have excellent acid and oxidation resistance.

The prior art, Korean Patent Registration No. 10-0603908, “electrode plate for storage battery and method for manufacturing the same,” is to manufacture an electrode plate by attaching fiber-reinforced paper by applying pressure so that fiber filaments are embedded on the surface of the active material and filling the uneven portions of the surface with the active material. Disclose the method.

The above-mentioned conventional Korean registered patent relates to "electrode plates for storage batteries and their manufacturing method," in which an active material with electrochemical activity is applied to a substrate that serves as a passage for electricity to flow, and fiber-reinforced paper is applied to the surface of the active material. In the attaching or pressing step, pressure is applied so that the fiber filaments of the fiber-reinforced paper are embedded to a certain depth, and the surface irregularities of the fiber-reinforced paper are filled with the active material to increase the bonding surface area, thereby preventing the active material from being detached from the substrate. Technology that improves the initial high-rate discharge characteristics of the electrode plate due to the porosity of the fiber-reinforced paper and extends the life of the storage battery by retaining and supporting the active material due to the stable support and acid resistance of the fiber filament structure of the fiber-reinforced paper. It's about.

Until now, lead (Pb)-calcium (Ca)-tin (Sn) alloy has been used as the grid alloy for lead acid batteries, but this alloy composition alone cannot sufficiently respond to the harsh operating environment (high temperature and overcharge phenomenon), leading to corrosion or corrosion of the grid. It has been pointed out as a problem that the lifespan of lead acid batteries is shortening due to deformation due to growth.

Accordingly, there is a need to improve grid corrosion resistance, mechanical strength, and suppress growth deformation.

Meanwhile, the active materials of conventional lead acid batteries are generally based on lead powder and aqueous sulfuric acid solution, and other additives are mixed according to the characteristics of the anode and cathode and then mixed to make the active material.

The active material made in this way goes through a coating process, which is a process of applying it to a substrate, and then goes through a maturation process and drying process depending on the positive/cathode characteristics, and then multiple sheets of prepared positive and negative electrode plates are alternately overlapped to prevent electrical short-circuiting between the electrode plates. For this purpose, a non-conductive separator is installed so that the positive electrode plate, negative electrode plate, and separator plate form a group of electrode plates.

Several groups of electrode plates are connected in series according to the capacity of the storage battery and accommodated in the cell.

The received group of electrode plates undergoes a supercharged chemical process to obtain electrical properties. At this time, the active material of the positive plate is lead dioxide (PbO2), and due to its characteristics, countless fine particles of oxidized lead are combined, and the particles are rich in porosity. Electrolytes are allowed to freely diffuse and penetrate the liver.

In addition, the active material of the negative electrode plate is spongy lead (Pb), which is also rich in porosity and reactivity, allowing the electrolyte to freely diffuse and penetrate.

Only then can products made in this way become available on the market.

In addition, to facilitate the initial charging process and improve the durability of the product, separate aging and drying processes are performed for each polarity.

The aging process of the positive plate is an important process that increases the durability of the product. The hot temperature of steam (approximately 70 ~ 100℃) and moisture (humidity of 99% or more) convert lead (Pb), a component of the active material, into lead oxide (lead oxide). Not only does it change it to PbO), but it also changes the crystal structure of the active material.

If the negative electrode plate is left in natural conditions without any additional processing, it can be aged and dried at the same time.

However, if sufficient aging and drying are not achieved, the electrode plates stick together during the assembly process to form the electrode group, and the durability of the active material decreases due to the presence of moisture, so the active material embedded between the substrates easily falls off even with a small impact.

As the number of charging and discharging of a lead-acid battery made through this process increases, the active material falls off the substrate more easily due to the reaction between lead and sulfuric acid, and the fallen active materials can no longer participate in the reaction, ultimately leading to the breakdown of the lead-acid battery. By degrading performance, the lifespan of lead acid batteries is usually only 1 to 2 years.

Therefore, there is a need for a manufacturing process that can improve the durability and performance of lead acid batteries in line with the current demand for high-performance lead acid batteries.

Meanwhile, lead acid batteries are usually attached by applying the active material to the grid and then pressing non-woven PET or tissue paper onto the surface of the active material.

This is used only to support the active material applied to the grid so that it does not fall off the grid, and this active material support (non-woven fabric or tissue paper) is characterized by acid resistance, heat resistance, and oxidation resistance.

However, since these supports only support the active material by compression when applying the active material to the grid, when mounted on a vehicle and used, the removal of the active material from the grid is accelerated depending on the user's usage conditions, environmental conditions, and driving conditions, leading to battery capacity loss. And it caused a decrease in starting power or premature end of life.

Therefore, there is a need for a manufacturing process that can improve lead acid battery durability and performance while maintaining acid resistance, heat resistance, and oxidation resistance characteristics.

Republic of Korea Patent Registration No. 10-0483246

Therefore, the present invention was devised to solve the above conventional problems,

The purpose of the present invention is to manufacture a lead-acid battery by including an electrode plate attached by pressing a non-woven fabric produced by dipping a conductive paste to which irregular-sized graphite particles are added to the surface of the non-woven fabric and pressing it to the surface of the active material applied to the grid, thereby improving the electricity of the lead-acid battery. Lead improves the adhesion of active materials and improves electrical conductivity by applying conductive paste non-woven fabric with added graphite, which improves the basic performance (CCA) of lead acid batteries and improves early end of life by improving conductivity and adhesion of active materials. We aim to provide manufacturing of electrode plates for storage batteries.

In order to achieve the problem to be solved by the present invention, a method of manufacturing electrode plates for a lead acid battery in which the adhesion to the active material is increased and the electrical conductivity is improved by applying a conductive paste nonwoven fabric to which graphite is added according to an embodiment of the present invention is,

Active material application step (S100) of applying the active material to the grid; and

Graphite conductive paste dipping step (S200) for uniformly applying PET nonwoven fabric to the surface of the nonwoven fabric by dipping it into a conductive paste liquid containing irregularly sized graphite particles;

A graphite-added nonwoven fabric attachment step (S300) for pressing and attaching the dipped nonwoven fabric to the grid on which the active material is applied so that the irregularly sized graphite particles added to the conductive paste penetrate into the active material;

A graphite conductive paste high-temperature curing step for manufacturing a lead acid battery electrode plate in which the graphite-added conductive paste increases the adhesion between the active material and the nonwoven fabric by putting the grid attached to the graphite-added conductive paste nonwoven fabric in a dryer and drying it at high temperature. By including (S400);, the problem of the present invention is solved.

Through the present inventor's method of manufacturing electrode plates for lead acid batteries, which increases active material adhesion and improves electrical conductivity by applying the conductive paste nonwoven fabric to which graphite is added, a nonwoven fabric produced by dipping a conductive paste to which irregularly sized graphite particles are added onto the surface of the nonwoven fabric is produced. By manufacturing a lead-acid battery by including an electrode plate attached by pressing to the surface of the active material applied to the grid, the electrical conductivity of the lead-acid battery is improved and the adhesion of the active material is improved.

In addition, by using a conductive paste non-woven fabric with added graphite, the basic performance (CCA) of the lead acid battery is improved through improved electrical conductivity and the effect of improving early end of life is provided.

Figure 1 is a process diagram of a method of manufacturing an electrode plate for a lead acid battery in which the adhesion to the active material and the electrical conductivity are improved by applying a conductive paste nonwoven fabric to which graphite is added according to an embodiment of the present invention.
Figure 2 is a conceptual diagram of an electrode plate manufactured by a method of manufacturing an electrode plate for a lead acid battery in which the adhesion to the active material and the electrical conductivity were improved by applying a conductive paste nonwoven fabric to which graphite was added according to an embodiment of the present invention.
Figure 3 is a basis for comparing an improved product and a conventional product using an electrode plate manufactured in a method of manufacturing an electrode plate for a lead acid battery in which the adhesion to the active material and the electrical conductivity were improved by applying a conductive paste nonwoven fabric to which graphite was added according to an embodiment of the present invention. This is a graph of the performance evaluation results.

A method of manufacturing electrode plates for lead acid batteries that increases active material adhesion and improves electrical conductivity by applying a conductive paste nonwoven fabric to which graphite is added according to an embodiment of the present invention,

Active material application step (S100) of applying the active material to the grid; and

Graphite conductive paste dipping step (S200) for uniformly applying PET nonwoven fabric to the surface of the nonwoven fabric by dipping it into a conductive paste liquid containing irregularly sized graphite particles;

A graphite-added nonwoven fabric attachment step (S300) for pressing and attaching the dipped nonwoven fabric to the grid on which the active material is applied so that the irregularly sized graphite particles added to the conductive paste penetrate into the active material;

A graphite conductive paste high-temperature curing step for manufacturing a lead acid battery electrode plate in which the graphite-added conductive paste increases the adhesion between the active material and the nonwoven fabric by putting the grid attached to the graphite-added conductive paste nonwoven fabric in a dryer and drying it at high temperature. (S400);

At this time, in the graphite conductive paste high temperature curing step (S400),

The high temperature is characterized as being within the range of 300°C to 400°C.

At this time, in the graphite conductive paste dipping step (S200),

It is manufactured by dipping a conductive paste containing irregularly sized graphite particles onto the surface of a PET non-woven fabric to improve the electrical conductivity of the lead acid battery and the adhesion of the active material, thereby improving the low-temperature starting ability and high-temperature durability of the lead-acid battery. do.

At this time, the conductive paste to which the graphite particles are added is,

It is characterized as a liquid product manufactured using siloxane conjugate (Si-O-Si), a silicon-based polymer material, with silicon-oxygen bond as the skeleton, silver metal powder as a conductive filler, and graphite with a particle size in the range of 0.075 to 2 mm. do.

At this time, by the manufacturing method of the present invention, it is possible to provide a lead acid battery including an electrode plate for a lead acid battery to which a conductive paste nonwoven fabric to which graphite has been added is applied.

At this time, in the graphite conductive paste high temperature curing step (S400),

Dry at room temperature for 12 hours and then pre-heat-treat for 1 hour at 200°C in a dryer.

Finally, heat treatment is performed in a dryer within the range of 300°C to 400°C for 1 hour to ensure that there are no cracks or pores and that stable bonding between the electrode plate and the conductive paste containing graphite is possible.

Hereinafter, a method for manufacturing an electrode plate for a lead acid battery in which the adhesion to the active material and the electrical conductivity are improved by applying the graphite-added conductive paste nonwoven fabric according to the present invention will be described in detail through an example.

Figure 1 is a process diagram of a method of manufacturing an electrode plate for a lead acid battery in which the adhesion to the active material and the electrical conductivity are improved by applying a conductive paste nonwoven fabric to which graphite is added according to an embodiment of the present invention.

As shown in Figure 1, the present invention's method of manufacturing electrode plates for lead-acid batteries by applying the graphite-added conductive paste nonwoven fabric to increase active material adhesion and improve electrical conductivity is as follows:

Active material application step (S100) of applying the active material to the grid; and

Graphite conductive paste dipping step (S200) for uniformly applying PET nonwoven fabric to the surface of the nonwoven fabric by dipping it into a conductive paste liquid containing irregularly sized graphite particles;

A graphite-added nonwoven fabric attachment step (S300) for pressing and attaching the dipped nonwoven fabric to the grid on which the active material is applied so that the irregularly sized graphite particles added to the conductive paste penetrate into the active material;

A graphite conductive paste high-temperature curing step for manufacturing a lead acid battery electrode plate in which the graphite-added conductive paste increases the adhesion between the active material and the nonwoven fabric by putting the grid attached to the graphite-added conductive paste nonwoven fabric in a dryer and drying it at high temperature. (S400); is included.

The present invention improves the electrical conductivity of a lead-acid battery by manufacturing a lead-acid battery by including an electrode plate attached by pressing a non-woven fabric produced by dipping a conductive paste to which irregular-sized graphite particles are added onto the surface of the non-woven fabric and pressing it to the surface of the active material applied to the grid. And the adhesion of the active material is improved, thereby improving the basic performance (CCA) of the lead acid battery and improving its early lifespan.

In other words, by applying a conductive paste containing graphite, the adhesion of the active material can be improved, and by applying a conductive paste, the electrical conductivity within the active material can be improved and the ability to accept electrons can be improved.

As a result, it was confirmed through experiments that the basic performance (CCA) of the lead acid battery was improved and the early end of life was improved by improving electrical conductivity.

Additionally, the cause of lead acid battery failure depends on the type of load and how it is managed during use.

The main failure factors include active material sulphation, loss of electrode active material, anode lattice corrosion, separator damage, and complex factors.

In particular, in the case of products installed in automobiles, active material sulphation is accelerated depending on operating conditions and battlefield usage load, and electrode plate active material falls off, resulting in premature termination of life.

Therefore, it is important to reduce the acceleration of active material dropping from the grid.

In conclusion, by curing the graphite-added conductive paste on the surface of the active material of the grid, the adhesion of the active material is improved, and by using the conductive paste, electrical conductivity is improved, causing the problem of delayed sulphation and deactivation of the active material, which are the main causes of lifespan termination. has been improved.

In order to provide the above functions, the active material application step (S100) of the present invention applies the active material to the grid, and through the graphite conductive paste dipping step (S200), a nonwoven fabric made of PET is added with irregularly sized graphite particles. The conductive paste is evenly applied to the surface of the nonwoven fabric by dipping into the liquid.

Thereafter, through the graphite-added nonwoven fabric attachment step (S300), the dipped nonwoven fabric is pressed and attached to the grid on which the active material is applied, allowing irregularly sized graphite particles added to the conductive paste to penetrate into the active material, thereby increasing the support for the active material. It will improve.

Afterwards, through the graphite conductive paste high temperature curing step (S400), the grid to which the graphite-added conductive paste nonwoven fabric is attached is placed in a dryer and dried at high temperature, so that the graphite-added conductive paste increases the adhesion between the active material and the nonwoven fabric. The electrode plates of storage batteries are manufactured.

Specifically, in the graphite conductive paste high temperature curing step (S400),

The high temperature is characterized as being within the range of 300°C to 400°C.

The critical significance of performing high temperature treatment within the above range is that, as shown in Table 2, the lifespan at about 200°C is higher than the conventional 238 cycles, but it provides a slight lifespan extension effect of 20% or less, and at 400°C The lifespan at temperatures exceeding 238 cycles is not much different from the conventional 238 cycles, which is believed to be because cracks occur at high temperatures exceeding 400°C.

Therefore, it is desirable to carry out curing within the above-described temperature range.

Meanwhile, in the graphite conductive paste high temperature curing step (S400),

Dry at room temperature for 12 hours and then pre-heat-treat for 1 hour at 200°C in a dryer.

Finally, heat treatment is performed in a dryer within the range of 300°C to 400°C for 1 hour to ensure that there are no cracks or pores and that a stable bond between the electrode plate and the conductive paste is possible.

At this time, if the temperature exceeds 200°C during the preheating process, cracks may occur between the conductive paste applied during the final heat treatment and the electrode plate, and if the temperature is below the above temperature, stable bonding with the active material in the electrode plate is impossible. It would be desirable to observe the temperature.

Afterwards, it is finally heat treated in a dryer at a temperature of 300°C to 400°C for 1 hour to ensure that there are no cracks or pores and that a stable bond between the electrode plate and the conductive paste is possible.

At this time, the lifespan at temperatures exceeding 400 degrees is not much different from the conventional 238 cycles. This is believed to be because cracks occur at high temperatures exceeding 400 degrees, so the drying process is performed for 1 hour set within the above temperature range. Only then can the most optimal life cycle be provided.

On the other hand, the conductive paste to which graphite particles of the present invention are added is,

It is characterized as a liquid product manufactured using siloxane conjugate (Si-O-Si), a silicon-based polymer material, with silicon-oxygen bond as the skeleton, silver metal powder as a conductive filler, and graphite with a particle size in the range of 0.075 to 2 mm. do.

The above manufacturing conditions will be described in more detail below.

As described above, in order to determine the effect of the present invention, the active material was applied to a conventional grid, and then the non-woven fabric was pressed and attached to the active material, and the graphite-added conductive paste nonwoven fabric (100) manufactured by the present invention was used. Basic performance and lifespan tests were conducted using an electrode plate to which (see Figure 2) was applied.

The conventional products described below refer to products manufactured using electrode plates containing non-woven fabric as the active material used in the lead acid battery (BX80) manufactured by the applicant, and the improved products are conductive pastes with graphite added through the manufacturing method of the present invention. It refers to a product containing electrode plates for lead acid batteries to which non-woven fabric is applied.

In addition, through subsequent processes such as assembly and chemical conversion to impart electrical conductivity to the substrate, a conventional product (electrode plate containing non-woven fabric as an active material) and an improved product (graphite conductive paste non-woven fabric) with a final capacity of 70 Ah (20 hour rate capacity) are produced. An electrode plate for a lead-acid battery was manufactured, and charge acceptability and 50% DoD durability tests were conducted to prove the effectiveness of the electrode plate containing graphite-added conductive paste non-woven fabric.

1) Charge Acceptance test (CA: Charge Acceptance test)

A fully charged sample is discharged for 2.5 hours at room temperature (25±2℃) at a 5-hour rate current (17.5A based on 70Ah), and then left at 0±2℃ for more than 12 hours.

Afterwards, charge it at a constant voltage of 14.4V±0.1V and measure the current at 10 minutes of charging.

As a result of the test, it was found that the improved product had high electrical conductivity and charging efficiency, increasing the current by 40% in about 10 minutes compared to the conventional product.

division hour Conventional products improvement




Charge income 1 min 27.25 28.97 2 minutes 24.21 27.99 3 minutes 22.14 27.22 4 minutes 21.25 26.92 5 minutes 20.11 25.85 6 minutes 19.35 24.96 7 minutes 18.74 24.46 8 minutes 17.68 23.69 9 minutes 17.04 23.67 10 minutes 16.43 22.98

Typically, lead acid batteries are attached by applying active material to the grid and then pressing non-woven PET or tissue paper onto the surface of the active material.

This is used only to support the active material applied to the grid so that it does not fall off the grid, and this active material support (non-woven fabric or tissue paper) is characterized by acid resistance, heat resistance, and oxidation resistance.

However, since this support supports the active material only by compression when applying the active material to the grid, when it is installed and used in a vehicle, the removal of the active material from the grid is accelerated depending on the user's usage conditions, environmental conditions, and driving conditions, thereby reducing the battery capacity. And it causes a decrease in starting power or premature end of life.

However, in the case of the above method, problems arose in providing performance in an environment that requires increasingly higher basic performance.

On the other hand, in order to improve this problem, the present invention uses a non-woven fabric formed with a conductive paste to which graphite is added, which has excellent adhesion to the active material and excellent electrical conductivity.

Therefore, by applying a conductive paste, the adhesion of the active material is improved, and by using a conductive paste, the basic performance (CCA) of the lead acid battery is improved and the early end of life is improved through improved electrical conductivity.

The conductive paste used in the present invention is a silicon-based polymer material based on a siloxane bond (Si-O-Si) with a silicon-oxygen bond as the skeleton, and silver metal powder is used as a conductive filler.

This is an adhesive with excellent heat resistance, acid resistance, weather resistance, and electrical properties. It uses conductive particles to bring adherends into close contact with each other, and at the same time connects the particles in chains, thereby exhibiting conductivity and adhesion.

In order to further strengthen the adhesion, graphite with a particle size in the range of 0.075 ~ 2mm is used, so that the graphite particles of 0.075 ~ 2mm in size added to the conductive paste adhere to and compress the surface of the active material applied to the grid and attach to the active material. As it penetrates, conductivity and adhesion are further increased.

2) Accelerated life test (SAE J2801)

The lead acid battery is subjected to 34 charge/discharge cycles in a water bath at 75°C for approximately one week, similar to typical vehicle conditions.

After performing 34 cycles, the life test is conducted by discharging at 200A for 10 seconds, and if the voltage is maintained above 7.2V, the cycle is repeated 34 times.

In addition, the test is stopped when the current at the end of the charging phase during the cycle rises above 15A or when the voltage falls below 12.0V during rest, or when the voltage falls below 7.2V during the weekly verification phase when discharging 200A.

Table 2 below shows the results of the SAE J2801 test, showing the voltage when discharged at 200A for 10 seconds for every 34 charge/discharge cycles.

cycle Paste not applied Apply paste + do not apply preheat treatment Apply paste + apply preheat treatment + dry at 200 degrees Apply paste + apply preheat treatment + dry at 350 degrees Apply paste + apply preheat treatment + dry at 450 degrees 34 11.82 11.83 11.85 11.88 11.82 68 11.76 11.77 11.80 11.85 11.70 102 11.72 11.73 11.78 11.83 11.62 136 11.69 11.71 11.76 11.75 11.59 170 11.65 11.68 11.74 11.73 11.50 204 11.55 11.61 11.69 11.70 11.42 238 11.43 11.45 11.60 11.65 11.30 272 7.2 and below 7.2 and below 11.49 11.60 7.2 and below 306 7.2 and below 11.55 340 11.50 374 11.41 408 7.2 and below

In the case of Table 2 above, when the conductive paste was not applied, the lifespan was 238 cycles, and when the conductive paste was applied but no preheating process was performed, the lifespan was also 238 cycles.

Meanwhile, the conductive paste was applied and preheated, but when dried at a temperature of 200 degrees, the lifespan was slightly improved from 238 cycles to 272 cycles, but it was confirmed that the improvement was not significant.

However, by applying the conductive paste, preheating, and drying at a temperature of 350 degrees, it was found that the lifespan was improved by 57% from 238 cycles to 374 cycles.

Therefore, it was found that the most crispy drying temperature was 350 degrees within the range of 300 to 400 degrees.

Meanwhile, after applying the conductive paste, preheating, and drying at a temperature of 450 degrees, which exceeds 400 degrees, it was found that the cycle returned to 238. This is believed to be because cracks occur at very high temperatures exceeding 400 degrees. .

Therefore, it is desirable to carry out curing within the above-described temperature range.

3) Basic performance test (SAE CCA)

division Conventional products improvement SAE CCA 10sec, V (630A discharge) 7.4V 7.9V

As shown in Table 3 and Figure 3, in the case of the basic performance test (SAE CCA), the conventional product was 7.4V, but the improved product was 7.9V, showing a 7% basic performance improvement.

Therefore, in the case of a lead acid battery including an electrode plate to which graphite-added conductive paste nonwoven fabric is applied, basic performance can be improved.

Through the above manufacturing method, a lead-acid battery is manufactured by including an electrode plate attached by pressing a non-woven fabric produced by dipping a conductive paste to which irregular-sized graphite particles are added onto the surface of the non-woven fabric and attaching it by pressing it to the surface of the active material applied to the grid. It improves the electrical conductivity of the storage battery and the adhesion of the active material.

Those skilled in the art to which the present invention pertains as described above will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. Therefore, the embodiments described above should be understood in all respects as illustrative and not limiting.

S100: Active material application step
S200: Graphite conductive paste dipping step
S300: Graphite-added nonwoven fabric attachment step
S400: Graphite conductive paste high temperature curing stage

Claims (5)

In the method of manufacturing an electrode plate for a lead acid battery, which increases the adhesion of active materials and improves electrical conductivity by applying a conductive paste nonwoven fabric to which graphite is added,
Active material application step (S100) of applying the active material to the grid; and
Graphite conductive paste dipping step (S200) for uniformly applying PET nonwoven fabric to the surface of the nonwoven fabric by dipping it into a conductive paste liquid containing irregularly sized graphite particles;
A graphite-added nonwoven fabric attachment step (S300) for pressing and attaching the dipped nonwoven fabric to the grid on which the active material is applied so that the irregularly sized graphite particles added to the conductive paste penetrate into the active material;
A graphite conductive paste high-temperature curing step for manufacturing a lead acid battery electrode plate in which the graphite-added conductive paste increases the adhesion between the active material and the nonwoven fabric by putting the grid attached to the graphite-added conductive paste nonwoven fabric in a dryer and drying it at high temperature. Characterized by including (S400);
In the graphite conductive paste high temperature curing step (S400),
A method of manufacturing electrode plates for lead acid batteries that increases active material adhesion and improves electrical conductivity by applying graphite-added conductive paste nonwoven fabric, characterized in that the high temperature is within the range of 300 ℃ to 400 ℃.
delete According to clause 1,
In the graphite conductive paste dipping step (S200),
It is manufactured by dipping a conductive paste containing irregularly sized graphite particles onto the surface of a PET non-woven fabric to improve the electrical conductivity of the lead acid battery and the adhesion of the active material, thereby improving the low-temperature starting ability and high-temperature durability of the lead-acid battery. A method of manufacturing electrode plates for lead acid batteries that increases adhesion to active materials and improves electrical conductivity by applying a conductive paste non-woven fabric to which graphite is added.
According to clause 1,
Conductive paste with graphite particles added,
A lead-acid battery that increases active material adhesion and improves electrical conductivity by applying a conductive paste non-woven fabric to which graphite is added, characterized by containing a siloxane conjugate (Si-O-Si) with a silicon-oxygen bond as the skeleton, a silicon-based polymer material. Method for manufacturing electrode plates.
By the manufacturing method of claim 1,
A lead-acid battery containing electrode plates for lead-acid batteries using a conductive paste non-woven fabric with added graphite.