KR20200045224A - Manufacture of gold-plated grid for the production of lead-acid batteries for high temperature regions and lead acid battery - Google Patents

Abstract

The present invention relates to a method for manufacturing a gold-plated grid for making a lead-acid battery for a high temperature region and a lead-acid battery thereof and, more specifically, to a method for manufacturing a gold-plated grid for making a lead-acid battery for a high temperature region, in which gold is plated on a cathode grid of a lead-acid battery to solve a problem that lifespan is reduced by 50% or more than a lead-acid battery used at room temperature and in particular, a short circuit is generated by growth of a grid when an existing lead-acid battery is used in a high temperature region of 30°C or higher, thereby simultaneously providing an effect of restricting grid growing deformation caused by corrosion of the grid and a performance increase effect due to increase of electric conductivity, and a lead-acid battery thereof. Accordingly, the increase of the electric conductivity and reduction in weight due to a lower density than an existing alloy (or metal) can be expected and a corrosion resistance increase effect due to prevention of a product by reaction with metal can be provided. In particular, a high temperature durability increase effect is provided, thereby providing the lead-acid battery for a high temperature region. According to the present invention, the method comprises a lead grid manufacturing step, a gold plating layer forming step, and a lead plating layer forming step.

Description

Manufacture of gold-plated grid for the production of lead-acid batteries for high temperature regions and lead acid battery}

The present invention relates to a gold-plated grid manufacturing method and a lead acid battery for manufacturing a lead acid battery for a high temperature region, and more specifically, a lead acid battery used at normal temperature when a lead acid battery is used in a high temperature region of 30 ° C. or higher. Compared to the above, the lifespan is reduced by 50% or more, and in particular, in order to improve the short circuit caused by grid growth, gold is plated on the positive electrode grid of the lead-acid battery, so that the effect of suppressing grid growth deformation due to grid corrosion and electrical conductivity The present invention relates to a gold-plated grid manufacturing method and a lead-acid battery for manufacturing a lead-acid battery for a high-temperature area that can simultaneously provide an effect of improving performance due to an increase.

The prior art, Korean Patent Registration No. 10-0603908, “A battery electrode plate and a manufacturing method thereof,” is prepared by applying a fiber-reinforced paper under pressure to attach fiber filaments to the surface of the active material, and filling the concave-convex portion of the surface to produce an electrode plate. The method is disclosed.

The above-mentioned conventional Korean registered patent relates to a "electrode plate for a storage battery and a method for manufacturing the same", and the electrode plate of the storage battery is coated with an active material having electrochemical activity on a substrate serving as a passage for electricity, and a fiber-reinforced paper is applied to the surface of the active material. In the step of attaching or compressing, the fiber filaments of the fiber-reinforced paper are attached by applying pressure to a certain depth, and the active material is filled in the irregularities of the surface of the fiber-reinforced paper to increase the binding surface area. Preventing, further improving the initial high-rate discharge characteristics of the electrode plate due to the porosity of the fiber-reinforced paper, and also prolonging the life of the storage battery by retaining and supporting the active material due to the stable support capacity and acid resistance of the fiber filament structure of the fiber-reinforced paper It is about.

Until now, lead (Pb) -calcium (Ca) -tin (Sn) -based alloys have been used as grid alloys for lead-acid batteries, but these alloys alone do not sufficiently cope with harsh usage environments (high temperature and overcharge phenomenon), causing corrosion or corrosion of the grid. It is pointed out that the problem is that the lifespan of the lead acid battery is shortened due to the deformation due to the growth.

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

On the other hand, the aging process of the positive electrode plate is an important process to increase the durability of the product. It oxidizes lead (Pb), a component of the active material, with hot temperature (about 70 to 100 ° C) of steam and moisture (at least 99% humidity). It not only changes to lead (PbO), but also changes the crystal structure of the active material.

The cathode plate can be aged and dried at the same time if left in a natural state without a separate process.

However, if sufficient maturation and drying are not achieved, the electrode plates and the electrode plates stick together in the assembly process of forming the electrode plate group, and moisture is present, so the durability of the active material is reduced and the active material embedded between the substrates is easily dropped even with a small impact.

As the number of charge and discharge increases, the lead-acid battery made through this process is more likely to fall off the substrate by the reaction of lead and sulfuric acid, and the fallen active materials can no longer participate in the reaction. By reducing the performance, the lead-acid battery's lifespan is usually only 1 to 2 years.

Therefore, there is a need for a manufacturing process capable of improving lead acid battery durability and performance.

And, at present, the conditions of materials required for high-temperature lead-acid batteries are suppression of grid growth and corrosion, and accordingly, new types of materials have been developed to meet requirements such as improvement of charge and discharge characteristics.

Current grid alloys for lead acid batteries are manufactured using lead-tin-calcium-based alloys, but research on various composite materials such as carbon material coatings has been recently conducted.

In manufacturing a conventional lead acid battery grid, a lead-tin-calcium-based alloy is manufactured by applying a pressing and punching process.

Owing to the nature of lead, which is the main material of the existing lead acid battery, it easily reacts with oxygen to oxidize and lead growth occurs according to grain growth.

Particularly, in the case of a product mounted in a vehicle in a high temperature area, grid corrosion is accelerated according to operating conditions and loads used in the battlefield, leading to an early end of life due to lead-acid battery short circuit.

Therefore, there is a need to develop a lead acid battery capable of improving the problems described so far.

Republic of Korea Patent Registration No. 10-0483246

Therefore, the present invention has been devised to solve the conventional problems,

In the case of a product mounted on a vehicle in a high temperature area, grid corrosion is accelerated according to the operating conditions and the load used on the electric field, resulting in an early end of life due to lead-acid battery short circuit. In order to improve, it is to improve the performance and prevent the end of early life by improving the electrical conductivity and corrosion resistance by processing the gold plating on the grid surface.

In order to achieve the problem to be solved by the present invention, a method for manufacturing a gold-plated grid for manufacturing a lead acid battery for a high-temperature region according to an embodiment of the present invention,

Lead grid manufacturing step of manufacturing a lead grid as a substrate (S100); And

A gold plating layer forming step (S200) of forming a gold plating layer by vacuum deposition with gold on a vacuum surface of the lead grid; and

By including a lead plating film layer forming step (S300) of forming a lead plating film layer on the formed gold plating layer, to provide a gold plating grid as a solution to the problem.

The present inventor, through the gold-plated grid manufacturing method and lead-acid battery for the production of lead-acid batteries for high-temperature areas, improves electrical conductivity, expects to be lighter at a lower density than existing alloys (or metals), and improves corrosion resistance by suppressing reaction products with metals It provides an effect.

In particular, by providing a high temperature durability improvement effect, it is possible to provide a lead acid battery for a high temperature region.

1 is a process diagram of a gold-plated grid manufacturing method for manufacturing a lead acid battery for a high temperature area according to an embodiment of the present invention.
Figure 2 is a graph comparing the improved product and the conventional product prepared in a gold-plated grid manufacturing method for producing a lead acid battery for a high temperature area according to an embodiment of the present invention, life in a high temperature environment according to the American Automobile Engineers Association standard It is a graph drawing verified.
3 is a perspective view showing a grid of a gold-plated grid manufacturing method for manufacturing a lead acid battery for a high temperature area according to an embodiment of the present invention.
4 is a perspective view showing a gold plating grid produced by a gold plating process grid manufacturing method for manufacturing a lead acid battery for a high temperature area according to an embodiment of the present invention.

Method for manufacturing a gold-plated grid for manufacturing lead acid batteries for high-temperature areas according to an embodiment of the present invention,

Manufacturing a lead grid as a substrate (S100); and

A gold plating layer forming step (S200) of forming a gold plating layer by vacuum deposition with gold on a vacuum surface of the lead grid; and

By including a lead plating film layer forming step (S300) for forming a lead plating film layer on the formed gold plating layer, it characterized in that to provide a gold plating grid.

At this time, the lead plating film layer forming step (S300),

It is characterized in that the hard plating prepared by mixing one or more selected from nickel, silver, copper, indium, and cobalt by 0.1 to 8.0% vacancy is vacuum-deposited using a vacuum evaporator.

In addition, the gold plating grid,

Characterized in that it is applied to the blended positive electrode active material mixture.

Therefore, by the method of manufacturing a gold-plated grid for the production of lead-acid batteries for high temperature areas,

When the capacity of the manufactured lead acid battery is 80 Ah,

The service life is characterized by being able to provide a durability improvement of 11 to 15% from 304 to 315 cycles at 274 cycles.

Therefore, by the manufacturing method of the present invention,

It is possible to provide a lead acid battery including a gold-plated grid.

Hereinafter, it will be described in detail through an embodiment of a gold-plated grid manufacturing method and a lead acid battery for manufacturing a lead acid battery for a high temperature area according to the present invention.

1 is a process diagram of a gold-plated grid manufacturing method for manufacturing a lead acid battery for a high temperature area according to an embodiment of the present invention.

As shown in Figure 1, the present invention is a method for manufacturing a gold-plated grid for the production of lead acid batteries for high-temperature areas,

Lead grid manufacturing step of manufacturing a lead grid as a substrate (S100); And

A gold plating layer forming step (S200) of forming a gold plating layer by vacuum deposition with gold on a vacuum surface of the lead grid; and

And a lead plating film layer forming step (S300) of forming a lead plating film layer on the formed gold plating layer.

Specifically, through a lead grid manufacturing step (S100), as shown in FIG. 3, a lead grid as a substrate is manufactured.

Thereafter, through a gold plating layer forming step (S200), a gold plating layer is formed by vacuum deposition on the surface of the lead grid using gold using a vacuum evaporator.

Then, by forming a lead plating film layer on the formed gold plating layer through the lead plating film layer forming step (S300), it is characterized in that to provide a gold plating grid as shown in FIG.

Through the above-described manufacturing method, in the case of the lead-acid battery produced, when using a lead-acid battery in a high temperature region of 30 ° C or higher, the life span is reduced by 50% or more compared to the lead-acid battery used at room temperature, especially for grid growth By improving the problem of short circuit caused by plating, gold is plated on the anode grid of a lead-acid battery, thereby providing an effect of suppressing grid growth deformation due to grid corrosion and an effect of improving performance due to an increase in electrical conductivity.

In other words, the consumption strategy is increasing due to the increase in safety devices such as navigation systems, black boxes, electric seats, and safety devices such as ABS, VDC, and anti-theft alarm systems, which require high-performance batteries. In the case of lead-acid batteries used in, the life of lead-acid batteries used at room temperature is reduced by 50% or more.

In more detail, the cause of the failure of the battery depends on the type of load and how it is managed during use.

The main failure factors are positive electrode active material sulfation, negative electrode active material sulfation, positive electrode lattice corrosion, separator breakage, and complex factors. In particular, in the case of a product mounted in a vehicle in a high temperature area, grid corrosion is accelerated depending on the operating conditions and the load used on the battlefield, leading to an early end of life due to lead-acid battery short circuit.

Therefore, in the present invention, by performing gold plating on the surface of a conventional grid, electrical conductivity and corrosion resistance are improved, thereby preventing performance improvement and end of life.

In consideration of the problems of the prior art described above, as a result of repeated studies until the present invention, if a lead-acid battery is manufactured by vacuum-depositing gold on a conventional lead-acid battery positive electrode grid to produce a gold-plated grid, it prevents anode corrosion and electrical conductivity. It has been discovered that the basic performance can be improved by more than 10% and the durability can be improved by 11% compared to a conventional lead acid battery, and the present invention has been completed through a verification test.

As described above, in order to grasp the effect of the present invention, nickel, silver, indium, cobalt, etc. are mixed with vacancy by 0.1 to 8%, and vacuum-deposited on a lead-acid battery anode grid to produce a gold-plated grid. A finished battery product was produced.

In order to grasp the effects of the above invention, a conventional electrode plate was fabricated, assembled, and converted to perform basic performance and life tests.

In addition, a product having a final capacity of 80 Ah was produced, and a life test was conducted according to the SAE J2801 standard to verify life at high temperatures.

As a result of the test, the capacity and life of 88Ah at the holding capacity ended at 304 cycles, which improved by 10% at the holding capacity compared to the conventional product and 11% at the life.

Test data for this will be described later.

Figure 2 is a graph comparing the improved product and the conventional product prepared in a gold-plated grid manufacturing method for producing a lead acid battery for a high temperature area according to an embodiment of the present invention, life in a high temperature environment according to the American Automobile Engineers Association standard It is a graph drawing verified.

<Test Example>

The conventional product, which will be described later, refers to a product manufactured through a grid manufacturing method of applying an active material used in a lead acid battery (BX80) manufactured by the applicant, and the improved product is manufactured in a high temperature region lead acid battery through the manufacturing method of the present invention. Refers to a product manufactured through a gold-plated grid manufacturing method.

division Conventional products Improvement RC 125min 138min CCA 635A 700A C20 80Ah 88Ah Durability (SAE J2801) 274 Cycle 304 Cycle

Table 1 shows the performance test results of a lead acid battery using a conventional manufacturing method and a lead acid battery manufactured using the manufacturing method of the present invention. In the case of a conventional product, durability was 274 cycles, and in the case of an improved product, 304 cycles were used. (See Fig. 2)

Therefore, it was confirmed through experiments that the durability was improved by 11% over the conventional products.

1) Reserve Capacity (RC)

Retention capacity RC measures the dischargeable duration until discharge end voltage reaches 10.5 V at 25 ° C. with a discharge current of 25 A after standing for 1 hour or more after full charge is completed. For example, it stops starting in a vehicle. It is a measure of how long the minimum function can be achieved to operate the load in conditions.

As a result of the test, as shown in Table 1, when the product was manufactured with a gold-plated grid according to the present invention, the holding capacity (RC) is 135 to 140 minutes, and precisely 138 minutes, 10% performance compared to the conventional product. By showing the improvement, it was found that the gold-plated grid had a positive effect on the holding capacity.

2) Cold Cranking Ampere (CCA)

In general, the rapid discharge characteristic of a battery rapidly decreases below -10 ℃, and the low-temperature starting current (CCA) is a high-rate discharge test for evaluating the starting ability of a vehicle at low temperatures. The voltage at the time of ultra-discharge is measured.

In this test, a voltage of 30 seconds or more is required at 7.2 V or higher, and the higher the performance, the better the performance.

In the present invention, CCA was calculated using a correction formula of (30 sec voltage ÷ 6-0.2) x 630.

As shown in Table 1, the 30-second voltage is 7.70V to 7.82V, the converted CCA is 680A to 700A, and it is exactly 700A, which is a gold plating grid by showing a 10% performance improvement effect compared to existing products. It was found that when the product was manufactured, it had a positive effect on the low-temperature starting current.

3) 20 hour rate capacity (AH)

This is to find out the low-rate discharge characteristics, and is to continuously discharge at 3.75A, which is a relatively small current for the battery capacity, to measure the discharge capacity (AH) until the voltage reaches 10.5V.

As a result of the test, 85AH ~ 90AH, exactly 88AH, showing a 4% performance improvement effect compared to the existing product, which has a positive effect on the 20 hour rate capacity (AH) when the product is manufactured with a gold-plated grid. I could see.

4) Life test (SAE J2801, Cycle)

As a graph (J2801) of verifying life in an environment of 75 ° C according to the American Society of Automotive Engineers, the test standard measures the cycle until the life of the lead-acid battery is repeatedly charged / discharged at high temperature (75 ° C). It is a test method.

(1 cycle: 25A 18 sec discharge, 14.2V [max 25A] constant voltage 30 min charge-1 cycle after 5 repetitions)

This test was repeated 34 times for one week, and after standing for 56 hours, discharged at a high rate of 200 A to measure the voltage at the time of 30 seconds to determine the state of the battery.

If the voltage at 30 seconds is 7.2V or more, the battery is judged to be in an intact state, and the above cycle is repeated. If it is 7.2V or less, the battery is judged to be at the end of its life and the test is stopped.

As a result of the test, it can be seen that when the product was manufactured with a gold plating grid by showing an effect of 11% improvement in life compared to the conventional product, it had a positive effect on the increase in life.

Through the above manufacturing method, the electrical conductivity is improved, the weight is expected to be reduced to a density lower than that of the existing alloy (or metal), and the corrosion resistance is improved by suppressing the reaction product with the metal.

In particular, by providing a high temperature durability improvement effect, it is possible to provide a lead acid battery for a high temperature region.

Those of ordinary skill in the art to which the present invention pertains to the above contents can understand that the present invention may be implemented in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, the embodiments described above are exemplified in all respects and should be understood as non-limiting.

S100: Lead grid manufacturing step
S200: Gold plating layer formation step
S300: Lead plating film layer formation step

Claims (5)

In the method of manufacturing a gold-plated grid for the production of lead-acid batteries for high-temperature areas,
Lead grid manufacturing step of manufacturing a lead grid as a substrate (S100); And
A gold plating layer forming step (S200) of forming a gold plating layer by vacuum deposition with gold on a vacuum surface of the lead grid; and
By including a lead plating film layer forming step (S300) of forming a lead plating film layer on the formed gold plating layer, by providing a gold plating grid, gold plating process grid manufacturing method for producing a lead acid battery for a high temperature region.
According to claim 1,
The lead plating film layer forming step (S300),
Gold for high-temperature area lead-acid battery production, characterized by vacuum deposition of a hard plating prepared by mixing 0.1 to 8.0% vacancy by mixing one or two or more selected from nickel, silver, copper, indium, and cobalt Method of manufacturing a plated grid.
According to claim 1,
The gold plating grid,
Method for manufacturing a gold-plated grid for the production of lead acid batteries for high temperature regions, characterized in that they are applied to the blended positive electrode active material mixture.
According to claim 1,
By the method of manufacturing a gold-plated grid for the production of lead-acid batteries for high temperature areas,
When the capacity of the manufactured lead acid battery is 80 Ah,
The life span is from 274 cycles to 304 to 315 cycles, which can provide an 11 to 15% improvement in durability. A method of manufacturing a gold-plated grid for the production of lead-acid batteries for high-temperature areas.
By the manufacturing method of claim 1,
A lead acid battery containing a manufactured gold plated grid.

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