JPS6332854A - Manufacture of anode plate of lead-acid battery for instantaneous use - Google Patents

Abstract

PURPOSE:To prevent starting failure at a low temperature by washing an anode plate which has passed caustic dipping and then drying it in an inert gas, dipping the anode plate thereafter for 2 to 60 seconds in an organic solvent where 0.1-10.0wt% of lignin has been dissolved, and drying the anode plate in an inert gas at a low temperature. CONSTITUTION:An anode plate 2 carried on a conveyor 1 after washing in water is, after being dried, dipped in a liquid tank of an organic solvent, such as alcohol with 0.1-10.0wt% of lignin dissolved, for 2-60 seconds and then passed through an inert gas in a furnace 4 at a low temperature of 40-60 deg. C. At this temperature, the organic solvent included in the anode plate 2 evaporates and the temperature of the plate is kept within 100 deg.C with lignin thereby being prevented from being decomposed. By the dipping in the lignin solution lignin is absorbed to the inside and the surface of the plate, resulting in the effect same as that before washing in water or higher expected. Thus starting failure is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to an improvement in the method of manufacturing cathode plates for ready-to-use lead-acid batteries.

Conventional technology A ready-to-use lead-acid battery, which can be used on two sides immediately by simply injecting an electrolyte, is made of a negative electrode plate obtained by drying in an active gas while preventing oxidation after chemical formation, and a conventional method. It is assembled using dried anode plates.

Problems to be Solved by the Invention When using this ready-to-use lead-acid battery, the load current of the battery is large due to the cooling of the engine of an automobile or the like at low temperatures in the winter; when used in the winter, the engine cannot be started. However, it may reach the end of its lifespan sooner than the normal unformed one. The cause of this deterioration is that the lignin in the additive, which is said to be the lifeblood of the cathode plate, is exposed to heat ( :
The reason is that lignin decomposes and disappears (= This is due to the fact that the temperature of some electrode plates rises to around 300℃ when moisture removal is completed during the drying process, and this temperature causes lignin to decompose and disappear (
(occurs at around 200°C), and the cathode plate that comes out of the drying process is considered to be lightning because the cathode plate does not contain lignin. It is believed that ready-to-use lead-acid batteries using these electrode plates are unable to start up due to the inability to receive the primary charge while driving (photoelectric efficiency is very poor) and a decline in high-rate discharge performance at low temperatures. Ru.

Means for Solving the Problems The chemically formed cathode plate is washed with water, dried in an inert gas such as nitrogen or argon, and then 0.1 to 10% of lignin is added to a solution of an organic solvent such as alcohol. Ocaty.

Dip the cathode plate in the dissolved solution for 2 to 60 seconds and heat it at low temperature (4
It was dried in an inert gas at a temperature of 0 to 60°C.

Embodiment that does not cause inoperability FIG. 1 shows the process of drying the cathode plate in an inert gas. After the cathode plate 2 that has been washed with water and passed through the belt conveyor 1 (2) is dried, it is poured into a liquid tank 3 in which 0.1 to 30.0 cat of lignin is dissolved in a solution of an organic solvent such as alcohol.
After passing through the immersion for seconds, the temperature inside the furnace 4 in inert gas is set to 40 to 60
It is passed at a low temperature of about ℃. Due to this temperature, the organic solvent in the cathode plate 2 evaporates, and the temperature of the electrode plate is also 100° C. or less, so that lignin does not decompose and disappear. In addition, lignin is adsorbed on the surface and inside of the electrode plate due to immersion, and it is expected that the effect will be equal to or greater than that before washing with water. Note that the temperature inside the oven during water washing and drying is around 200 to 300°C.

Figure 2 shows a conventional ready-to-use lead-acid battery A of the NET4QZ type (according to the present invention) and a ready-to-use lead-acid battery C with unformed electrode plates. The voltage at the 5th grid point was measured during discharge for 150 people at 15°C.As can be seen from the results, compared to the conventional ready-to-use lead-acid battery A, the ready-to-use lead-acid battery B according to the present invention has a non-formed plate. It is almost equivalent to the original battery C, and the life span is improved by using a ready-to-use lead-acid battery according to the present invention (2).

Effects of the Invention As mentioned above, according to the present invention, there is no possibility of startup failure, especially at low temperatures, and the industrial value is extremely great.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the cathode plate manufacturing process according to the present invention, and Fig. 2 is a plan view of a conventional ready-to-use lead-acid battery, a ready-to-use lead-acid battery according to the present invention, and a finished battery using unformed electrode plates. It is a curve diagram showing the 5th grain voltage of 150-person discharge at -15°C during the end of the EIAK life. 1 is the cathode plate.

Claims (1)

[Claims] After washing the chemically formed cathode plate with water and drying it in an inert gas, the cathode plate is immersed in an organic solvent solution containing 0.1 to 10.0 wt% lignin for 2 to 60 seconds to make it inert at a low temperature. A method for manufacturing a cathode plate for a ready-to-use lead-acid battery, characterized by drying in a gas atmosphere.