KR102658470B1 - Electrode plate manufacturing method for lead-acid battery using hydrophilic fiber - Google Patents

Abstract

The present invention relates to a method of manufacturing electrode plates for lead acid batteries using hydrophilic fibers. More specifically, the present invention relates to a method of manufacturing electrode plates for lead acid batteries using hydrophilic fibers, and more specifically, by adding hydrophilic fibers or adsorptive carbon to the active material added to the negative electrode of a conventional lead acid battery and coating the electrode plates, thereby forming the electrode plates using hydrophilic fibers. By improving the porosity of the active material compared to conventional lead acid batteries, the water content in the active material is increased, thereby improving porosity, and the size of the pores is made larger than before by absorbent carbon, making it hydrophilic to adsorb PbSO4, which is a residual impurity. This relates to a method of manufacturing electrode plates for lead acid batteries using fiber.
The present invention provides the effect of improving the basic performance and charging efficiency of a lead acid battery by increasing the internal electrical conductivity of the negative electrode active material.

Description

{Electrode plate manufacturing method for lead-acid battery using hydrophilic fiber}

The present invention relates to a method of manufacturing electrode plates for lead acid batteries using hydrophilic fibers. More specifically, the present invention relates to a method of manufacturing electrode plates for lead acid batteries using hydrophilic fibers, and more specifically, by adding hydrophilic fibers or adsorptive carbon to the active material added to the negative electrode of a conventional lead acid battery and coating the electrode plates, thereby forming the electrode plates using hydrophilic fibers. By improving the porosity of the active material compared to conventional lead acid batteries, the water content in the active material is increased, thereby improving porosity, and the size of the pores is made larger than before by absorbent carbon, making it hydrophilic to adsorb PbSO4, which is a residual impurity. This relates to a method of manufacturing electrode plates for lead acid batteries using fiber.

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-described 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 at 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 also 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). PbO) and 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 from 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.

As a conventional technology, 'Negative active material and its manufacturing method and lead acid battery' has disclosed a technology related to a negative electrode active material characterized in that lignin is added to lead powder.

However, it was difficult to expect the above technology to improve the lifespan of the active material.

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 coat the electrode plate by adding hydrophilic fiber or adsorbent carbon to the active material added to the negative electrode of a conventional lead acid battery, thereby improving the porosity of the active material compared to the conventional lead acid battery with the hydrophilic fiber and reducing the water content in the active material. The purpose is to improve the porosity accordingly, and to make the pore size larger than before by using adsorptive carbon to adsorb PbSO4, which is a residual impurity.

In order to achieve the problem that the present invention seeks to solve, a method of manufacturing electrode plates for lead acid batteries using hydrophilic fibers according to an embodiment of the present invention,

In the active material mixing process of lead acid batteries,

When mixing lead powder, sulfuric acid, and additives according to the cathode, a binder solution preparation step (S100) of preparing a binder solution by mixing PE fiber and a binder as additives;

A hydrophilic mixture coating layer forming step ( S200);

By including a substrate drying step (S300) of drying the substrate on which the hydrophilic mixture coating layer is formed for 1 to 10 days within the range of 60 ℃ to 80 ℃, the problem of the present invention is solved.

Through the method of manufacturing electrode plates for lead acid batteries using hydrophilic fibers of the present invention, hydrophilic fibers or adsorbent carbon are added to the active material added to the negative electrode of conventional lead acid batteries and coated on the electrode plates, so that the hydrophilic fibers produce more active materials than conventional lead acid batteries. By improving porosity, the water content in the active material is increased, thereby improving porosity, and the size of the pores is made larger than before by absorbent carbon, allowing PbSO4, a residual impurity, to be adsorbed, improving performance and extending lifespan. It provides an effect.

Figure 1 is a process diagram of a method of manufacturing an electrode plate for a lead acid battery using hydrophilic fiber according to an embodiment of the present invention.

A method of manufacturing an electrode plate for a lead acid battery using hydrophilic fiber according to an embodiment of the present invention,

In the active material mixing process of lead acid batteries,

When mixing lead powder, sulfuric acid, and additives according to the cathode, a binder solution preparation step (S100) of preparing a binder solution by mixing PE fiber and a binder as additives;

A hydrophilic mixture coating layer forming step ( S200);

A substrate drying step (S300) of drying the substrate on which the hydrophilic mixture coating layer is formed within the range of 60°C to 80°C for 1 to 10 days.

At this time, in the binder solution preparation step (S100),

It is characterized by additionally preparing 0.1 to 5 parts by weight of Activated Carbon, an adsorption material, and mixing it into the binder solution.

At this time, the binder is,

It is characterized in that it is one of hydrophilic surfactants, silicone-based, fluorine-based, hydrocarbon-based or alcohol-based -COONa, -COOK, -SO ₃ Na, CH ₂ CH ₂ O, and -O-.

At this time, the content of the binder is,

It is characterized by adding 0.1 to 10 parts by weight based on 100 parts by weight of the negative electrode active material excluding the binder.

At this time, in the binder solution preparation step (S100),

As a binder, by applying any one of hydrophilic surfactants, silicone-based, fluorine-based, and hydrocarbon-based, the average particle size of the pore layer in the active material is improved from 50 to 65 nm to 55 to 70 nm.

By additionally applying Activated Carbon, an adsorption material, the average particle diameter of the pore layer within the active material is improved from 50 to 65 nm to 60 to 75 nm.

At this time, in the binder solution preparation step (S100),

As a binder, by applying any one of hydrophilic surfactants, silicone, fluorine, and hydrocarbon, the average particle diameter of the pore layer in the active material is improved from 50 to 65nm to 55 to 70nm, delaying the accumulation of PbSO ₄ ,

By additionally applying Activated Carbon, an adsorption material, the average particle diameter of the pore layer in the active material is improved from 50 to 65 nm to 60 to 75 nm, and it adsorbs PbSO4 to remove impurities in the electrolyte solution.

At this time, by the method of manufacturing electrode plates for lead acid batteries using the hydrophilic fiber of the present invention,

It is characterized in that the lifespan can be improved by 28.5% from 238 cycles, which is the lifespan without forming the hydrophilic mixture coating layer, to 306 cycles when the hydrophilic mixture coating layer is formed.

At this time, by the manufacturing method of the present invention,

A lead-acid battery containing electrode plates for lead-acid batteries using hydrophilic fibers is provided.

Hereinafter, the method for manufacturing electrode plates for lead acid batteries using hydrophilic fiber according to the present invention will be described in detail through examples.

Figure 1 is a process diagram of a method of manufacturing an electrode plate for a lead acid battery using hydrophilic fiber according to an embodiment of the present invention.

As shown in Figure 1, the method of manufacturing electrode plates for lead acid batteries using hydrophilic fiber according to the present invention,

In the active material mixing process of lead acid batteries,

When mixing lead powder, sulfuric acid, and additives according to the cathode, a binder solution preparation step (S100) of preparing a binder solution by mixing PE fiber and a binder as additives;

A hydrophilic mixture coating layer forming step ( S200);

A substrate drying step (S300) of drying the substrate on which the hydrophilic mixture coating layer is formed within the range of 60°C to 80°C for 1 to 10 days.

The present invention relates to a method of manufacturing an electrode plate for a lead acid battery using a hydrophilic fiber. By adding hydrophilic fiber or adsorbent carbon to the active material added to the negative electrode of a conventional lead acid battery and coating the electrode plate, the hydrophilic fiber makes it more effective than the conventional lead acid battery. By improving the porosity of the active material, the water content within the active material is increased, thereby improving the porosity, and the size of the pores is made larger than before by using adsorbent carbon to allow the adsorption of PbSO4, which is a residual impurity, thereby improving performance and longevity. It provides an extension effect.

It was confirmed through experiments that by applying a hydrophilic group or adsorption material to the hydrophobic (PE series) fiber that is generally used in manufacturing the active material of a lead acid battery, the efficiency of the active material of the lead acid battery can be improved and the charging ability can be improved.

For example, the manufacturing method of the present invention is used as a method of improving the performance and durability of lead acid batteries in vehicles equipped with the ISS vehicle (Stop & Start) system. Specifically, the porosity of the active material is increased compared to existing lead acid batteries. To improve this, hydrophilic fiber is applied to increase the water content in the active material and thereby improve porosity.

When manufacturing a typical lead acid battery active material, hydrophobic (PE-based) fiber is added to increase the porosity of the lead acid battery active material, and then applied, aged, and dried to form pores in the active material. This is a mechanism that contributes to the formation of pores in the lead acid battery active material. As the mixed mixture dries, pores are formed and the electrolyte solution penetrates into the pores to improve the efficiency of the active material. In the present invention, hydrophilic fiber is applied to increase the water content in the active material and thereby improve porosity.

In order to provide the above function, the binder solution preparation step (S100) of the present invention is a step of preparing a binder solution by mixing PE fiber and a binder as additives when mixing lead dust, sulfuric acid, and additives according to the cathode. am.

In order to provide the effect of the present invention, the binder content in the negative electrode active material is,

It is characterized by adding 0.1 to 10 parts by weight based on 100 parts by weight of the negative electrode active material excluding the binder.

If the weight part of the binder added is less than 0.1 parts by weight, the electrical conductivity of the electrode plate is similar to the conventional one, so it is a small amount where it is difficult to expect performance improvement, and if it exceeds 10 parts by weight, as proven in the accelerated life test, the life cycle It is difficult to expect more than a cycle of 10 parts by weight, and it only provides a cause for price increases.

Therefore, it would be desirable to add the binder within the above range.

At this time, the binder is,

It is characterized in that it is one of hydrophilic surfactants, silicone-based, fluorine-based, hydrocarbon-based or alcohol-based -COONa, -COOK, -SO3Na, CH ₂ CH ₂ O, and -O-.

And, in the binder solution preparation step (S100), as a binder, by applying any one of hydrophilic surfactants, silicone-based, fluorine-based, and hydrocarbon-based, the average particle diameter of the pore layer in the active material is changed from 50 to 65 nm to 55 to 70 nm. will improve.

Meanwhile, according to an additional aspect, in the binder solution preparation step (S100),

It is characterized by additionally preparing 0.1 to 5 parts by weight of Activated Carbon, an adsorption material, and mixing it into the binder solution.

Therefore, by additionally applying the adsorption material, Activated Carbon, the average particle diameter of the pore layer in the active material is improved from 50 to 65 nm to 60 to 75 nm.

Ultimately, in the binder solution preparation step (S100),

As a binder, by applying any one of hydrophilic surfactants, silicone, fluorine, and hydrocarbon, the average particle diameter of the pore layer in the active material is improved from 50 to 65nm to 55 to 70nm, delaying the accumulation of PbSO ₄ ,

By additionally applying Activated Carbon, an adsorption material, the average particle diameter of the pore layer within the active material is improved from 50 to 65 nm to 60 to 75 nm, preventing PbSO4 from accumulating and forming beyond a certain size.

In other words, when mixing active materials, hydrophilic group fiber that can absorb more water is applied, and when the active material is dried after manufacturing the electrode plate, the porosity increases as the formation of pores due to more water absorbed than before increases. By adding carbon, which is an absorbent material, the effect of enlarging pores can be provided.

In general, during frequent charging/discharging or deep charging/discharging of lead acid batteries, the size of PbSO ₄ accumulates. The size of the PbSO 4 gradually increases due to charging and discharging. As a result, it forms a non-ionized passivation salt even after charging and reaches the end of its lifespan. It provides the cause that leads to this.

Therefore, in the present invention, the problems caused by the active material of lead acid batteries are solved by applying hydrophilic fiber to make pores in the active material large and smooth, thereby delaying the accumulation of PbSO ₄ and applying activated carbon, an absorbent material, to the fiber. This eliminates the problem of PbSO ₄ accumulating and growing.

As a result, the lead acid battery formed shows a phenomenon in which the capacity drop rate is relatively low, and products with a small capacity drop provide improved durability.

The active material sulphation described in the present invention refers to the phenomenon in which the electrode plates become crystalline with lead sulfate (PbSO ₄ ), and the electrode plates are covered with an inert material when a lead acid battery is repeatedly charged and discharged.

The main causes include repeated use of charging and discharging over a long period of time, overdischarging, leaving it in a discharged state for a long period of time, when the specific gravity of the electrolyte is too low, when the electrode plate is exposed due to a lack of electrolyte, and impurities in the electrolyte. This occurs when it is mixed in, when insufficient charging is repeated, etc.

In the hydrophilic mixture coating layer forming step (S200), a hydrophilic mixture coating layer is formed by applying the prepared binder solution to a substrate made of lead using any one of the CVD (chemical vapor deposition) method, deeping coating method, and casting method. This is the stage for forming.

That is, the prepared binder solution is applied to a substrate made of lead using any one of the CVD (chemical vapor deposition) method, deep coating method, and casting method. Preferably, the deep coating method is used to coat the substrate. It is applied to form a hydrophilic mixture coating layer.

The substrate drying step (S300) is a step of drying the substrate on which the hydrophilic mixture coating layer is formed within the range of 60°C to 80°C for 1 to 10 days.

That is, after a certain amount of the negative electrode active material is evenly spread on a lead substrate, it is dried for 1 to 10 days within the range of 60°C to 80°C.

As described above, in order to determine the effect of the present invention, an electrode plate was manufactured by coating the hydrophilic binder of the present invention on the organic synthetic short fiber (PE fiber) previously used when mixing the active material, and then aged through an aging process. , basic performance and lifespan tests were conducted.

The conventional product described below refers to a product manufactured using a negative electrode plate applied after including organic synthetic short fibers in the active material used in the lead acid battery (BX80) manufactured by the applicant, and the improved product is manufactured through the manufacturing method of the present invention. This refers to a product containing electrode plates for lead acid batteries using hydrophilic fiber.

In addition, through subsequent processes such as assembly and chemical conversion to impart electrical conductivity to the substrate, conventional products (containing organic synthetic short fibers) and improved products (containing hydrophilic fibers) have a final capacity of 70 Ah (20 hour rate capacity). was produced, and charge acceptability and 50% DoD durability tests were conducted to prove the effectiveness of the hydrophilic fiber.

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 battery's conductivity and charging efficiency were high, and the current increased by 15% in about 10 minutes compared to the conventional product.

division hour Conventional products improvement




Charge income 1 min 27.25 28.17 2 minutes 24.21 27.32 3 minutes 22.14 26.83 4 minutes 21.25 24.92 5 minutes 20.11 23.83 6 minutes 19.35 22.74 7 minutes 18.74 20.96 8 minutes 17.68 19.29 9 minutes 17.04 19.67 10 minutes 16.43 18.89

Organic synthetic short fibers are added to the active material for the purpose of increasing the mechanical strength of the battery active material.

Considering acid resistance to sulfuric acid aqueous solution, which is an electrolyte, polypropylene, polyester, and modacrylic series are used as materials.

The organic synthetic short fibers used have a circular cross-section, which is the specification of a typical synthetic short fiber produced by direct spinning, a fineness of 2 to 5 denier (diameter is about 12 to 20 micrometers), and a length of 2 to 20 micrometers. It's 10 millimeters.

The amount added during mixing is 0.1 to 0.5 wt%, which improves the mechanical strength of the final electrode active material and suppresses the phenomenon of destruction of the active material structure due to contraction and expansion of the active material due to vibration and charging and discharging.

However, in the case of the organic synthetic short fibers, problems have arisen in providing performance in environments that require increasingly higher basic performance.

Therefore, in order to improve this problem, the present invention uses a hydrophilic binder.

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.

Additionally, the test is stopped if the charging current rises above 15A or the discharge voltage falls below 12.0V during the cycle.

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 Binder 0 parts by weight Binder 5 parts by weight Binder 10 parts by weight Binder 15 parts by weight
34 11.82 11.83 11.85 11.87 68 11.76 11.77 11.80 11.83 102 11.72 11.73 11.78 11.80 136 11.69 11.71 11.76 11.79 170 11.65 11.68 11.74 11.77 204 11.55 11.61 11.69 11.70 238 11.43 11.45 11.60 11.63 272 7.2 and below 11.21 11.49 11.55 306 7.2 and below 11.55 11.50 340 7.2 and below 7.2 and below

As shown in Table 2 above, the test results show that when the hydrophilic binder is not applied, the lifespan is 238 cycles, but when applied after adding 5 parts by weight, the lifespan is 272 cycles, and when applied after adding 10 parts by weight, the lifespan is 306 cycles. It was possible to provide a 28.5% lifespan improvement.

However, it can be seen that even if more than 10 parts by weight of the hydrophilic binder is added and then applied, the lifespan does not increase further at 306 cycles. Accordingly, it becomes 5 to 10 parts by weight, so it is preferable to add it within the above range.

This hydrophilic fiber improves the porosity of the active material compared to conventional lead acid batteries, increasing the water content in the active material. This improves porosity and increases the reaction surface area, increasing charging efficiency and reducing the sulphation content accumulated in the active material. This appears to be the result.

In other words, it showed a 28.5% improvement in lifespan compared to conventional products, showing that the addition of hydrophilic fiber had a positive effect on increasing the lifespan.

Meanwhile, as a result of the experiment, it was confirmed that when a hydrophilic type binder was used, the average particle diameter of the pore layer in the active material was improved from 50 to 65 nm to 55 to 70 nm.

At this time, it was confirmed that when 5 parts by weight of Activated Carbon, an adsorption material, was added, the average particle diameter of the pore layer in the active material improved from 50 to 65 nm to 60 to 75 nm.

Therefore, in the binder solution preparation step (S100), when 0.1 to 5 parts by weight of Activated Carbon, which is an adsorption material, is additionally prepared and mixed into the binder solution, the average particle diameter of the pore layer in the active material is improved from 50 to 65 nm to 60 to 75 nm. It will happen.

In particular, it was found that the average particle diameter of the pore layer improved from 65 nm to 75 nm when 5 parts by weight were added, and 5 parts by weight is preferably added.

Through the above manufacturing method, hydrophilic fiber or adsorbent carbon is added to the active material added to the negative electrode of a conventional lead acid battery and coated on the electrode plate. The hydrophilic fiber improves the porosity of the active material compared to the conventional lead acid battery, thereby improving the porosity of the active material within the active material. The water content is increased, the porosity is improved accordingly, and the pore size is made larger than before by absorbent carbon to allow the adsorption of PbSO4, which is a residual impurity, thereby providing the effect of improving performance and extending lifespan.

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: Binder solution preparation step
S200: Hydrophilic mixture coating layer formation step
S300: Substrate drying step

Claims (5)

In the method of manufacturing electrode plates for lead acid batteries using hydrophilic fiber,
In the active material mixing process of lead acid batteries,
When mixing lead powder, sulfuric acid, and additives according to the cathode, a binder solution preparation step (S100) of preparing a binder solution by mixing PE fiber and a binder as additives;
A hydrophilic mixture coating layer forming step ( S200); and
A substrate drying step (S300) of drying the substrate on which the hydrophilic mixture coating layer is formed within a temperature range of 60°C to 80°C for 1 to 10 days,
In the binder solution preparation step (S100),
It is characterized by additionally preparing 0.1 to 5 parts by weight of Activated Carbon, which is an adsorption material, and mixing it into the binder solution.
The binder is,
It is characterized in that it is one of hydrophilic surfactants, silicone-based, fluorine-based, hydrocarbon-based or alcohol-based -COONa, -COOK, -SO ₃ Na, CH ₂ CH ₂ O, -O-,
In the binder solution preparation step (S100),
As a binder, by applying any one of hydrophilic surfactants, silicone, fluorine, and hydrocarbon, the average particle size of the pore layer in the active material is improved from 50 to 65nm to 55 to 70nm, delaying the accumulation of PbSO ₄ ,
By additionally applying Activated Carbon, an adsorption material, the average particle diameter of the pore layer in the active material is improved from 50 to 65 nm to 60 to 75 nm, and adsorbs PbSO4 to remove impurities in the electrolyte solution.
The content of the binder is,
A method of manufacturing an electrode plate for a lead-acid battery using hydrophilic fiber, characterized in that 5 to 10 parts by weight are added based on 100 parts by weight of the negative electrode active material excluding the binder.
delete delete delete By the manufacturing method of claim 1,
A lead-acid battery containing electrode plates for lead-acid batteries using hydrophilic fiber.