JPH0215562A - Electrolyte stirring device of storage battery - Google Patents

Abstract

PURPOSE:To uniformize the concentration of electrolyte across the upper and lower parts of a storage battery, by stirring the electrolyte through utilization of gas generated from the battery. CONSTITUTION:A gas generating electrode 11 arranged within an electrolyte circulating tube 13 in the forefront cell 1a is connected via a switching element 14 to a battery terminal on a negative potential side from the forefront cell 1a, and the switching element 14 is turned on by using a signal outputted from a potential detecting electrode 12 which detects battery charging conditions when the battery is set in its charging condition. Then, electrolyte in the electrolyte circulating tube 13 is moved upstream and circulated by using gas generated from the gas generating electrode 11. The gas stayed on an electrolyte level in the cell is sequentially fed to an electrolyte circulating tube 8 in a second rank cell 1b to move the electrolyte upstream and circulate it in chain-reacting relation so that the gas is discharged out of the exhaust portion 5 of a terminal cell 1c. This makes it possible to uniformize the specific gravity of the electrolyte across the upper and lower parts of the battery.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an electrolyte stirring device for a storage battery.

Conventional technology and its problems @Since the electrolyte is a reactive substance for batteries, 1. Like the active material of the electrode plate, its electrolysis? It is well known that the capacity of a storage battery is greatly influenced by how it is used in the storage battery.

In addition, in the case of lead-acid batteries, the electrolyte at the top of the battery is often used during charging and discharging, so the specific gravity of the electrolyte at the top of the battery is low, and the electrolyte with high specific gravity always remains at the bottom of the battery. In order to eliminate the concentration difference between these electrolytes, overcharging is applied to generate gas, and the stirring action of this gas is used to equalize the upper and lower specific gravity. In this case, if the storage battery is vertically low, you can easily equalize the electrolyte by overcharging, but if the battery is tall, such as an electric car storage battery, even a small amount of overcharging will not always make the electrolyte uniform. It is.

As a result, the capacity decreases due to the low specific gravity electrolyte in the upper part of the electrode plate, and the high specific gravity and highly oxidizing electrolyte always remains in the lower part, which corrodes the lower edge of the electrode plate and shortens its life. It becomes. For this reason, the storage battery is overcharged every time it is charged, which wastes power and shortens the life of the storage battery.

In addition, in the case of stationary storage batteries, various loads are connected to the storage battery, and some loads do not like large voltage fluctuations, so overcharging is not possible, so a constant voltage charging system is used that cuts the charging voltage at a constant value. However, in storage batteries for this type of use, the above-mentioned phenomenon becomes even more pronounced. In addition, in order to solve these problems, even if equal charging is carried out over a long period of 12 to 24 hours, the equal charging voltage is low, so
It was not possible to fully solve the above problems.

Means for Solving the Problems The present invention provides an electrolyte stirring device for a storage battery that eliminates the above-mentioned drawbacks. That is, the present invention provides an assembled battery composed of a plurality of cells, in which a circulation pipe is provided vertically in the electrolyte in each cell, and a gas generating electrode is arranged in the liquid circulation cylinder of the first cell. It is connected to the battery terminal of a cell on the 11th potential side from the leading cell through a switching element, and when the battery is in a charging state, the switching element is turned on by a signal from a potential detection electrode that detects the charging state. The electrolyte in the liquid circulation cylinder is upwardly circulated by the gas generated from the gas generating electrode, and the gas remaining on the electrolyte surface in the cell is sequentially supplied to the Rin circulation cylinder of the next cell. The electrolyte is circulated upward in a chain manner, and the terminal cell is provided with an exhaust section for discharging gas to the outside.

Actual repair example Hereinafter, the present invention will be specifically explained using the drawings.

The figure does not show an embodiment of the electrolyte stirring device of the present invention, but is a schematic cross-sectional view.In Figure 0, 1a to IC are cells constituting the assembled battery of the present invention, and this embodiment assumes a case of 3 cells. . 2 is a lid, 3 is a liquid opening part of the lid, 4 is a sealing plug attached to the liquid part [1], 5 is an exhaust plug attached to the terminal cell IC, 6 is a cathode plate in the container, 7 is an anode plate, Reference numeral 8 denotes a tube for the liquid ring which is vertically placed in the electrolyte in the battery container, 9 is a gas inlet provided on the side of the tube, and 10 is a tube for supplying gas from the previous cell to the next cell. The tube to be moved, 11, is a gas generating electrode, which is inserted into a liquid circulation cylinder 13 standing upright in the first stage cell la, and the tip of the electrode reaches the lower end of the cylinder 13. 1
Reference numeral 2 denotes a potential detection electrode, which is kept in constant contact with the electrolytic solution of the first stage cell 1a, so that the potential of the electrolytic solution of the first stage cell can be detected. Reference numeral 14 denotes a switching section which is turned on and off by the potential detection electrode 12 and suppresses the current flowing through the gas generating type ALL.

Next, the operation of the above embodiment will be explained.

When the storage battery group is charged, the terminal voltage of each cell and the potential of the electrolyte increase. This increase in potential is detected by the auxiliary electrode 12 inserted into the electrolyte of the first stage cell 1a, and when the charging voltage reaches a predetermined voltage, the transistor in the switching section 14 is turned off.
The gas generating electrode 11 is brought into an N state, and a current is passed through the gas generating electrode 11 to generate gas by electrolysis from the tip of the electrode. When this generated gas rises inside the liquid circulation cylinder 13, the apparent specific gravity of the electrolyte in the cylinder decreases, so the electrolyte with a heavy specific gravity at the bottom of the container rises inside the cylinder, and the electrolyte flows through the upper opening. flows out along with the gas. Therefore, the electrolytic solution in the first stage cell 1a is added to the glass sink due to charging, and the electrolytic solution moves from the bottom of the container to the top in the cylinder 13, thereby making the electrolyte's upper and lower specific gravity uniform.

Although the potential detection electrode 12 described above is inserted into the electrolytic solution of the first stage cell 1a to detect the potential, it may also be connected to a battery terminal to detect the voltage.

Since the first stage cell 1a uses a liquid stopper at the bay mouth part 3 as a sealing stopper 3, the gas generated within the cell passes through the connecting tube 10,
Gas inlet 9 provided on the side of the liquid circulation cylinder 8 of the next cell
It is exhausted within 8 minutes.

In this case, similar to the gas rising in the liquid circulation tube 13 described above, this gas lowers the apparent specific gravity of the electrolyte in the liquid circulation tube 8, and moves the electrolyte with a heavy specific gravity at the bottom of the container upward. Suction to equalize the upper and lower specific gravity of the electrolyte in the cell.

The gas generated in each cell sequentially passes through the connecting tube 10, the liquid circulation tube 8, and is finally exhausted to the outside through the exhaust plug 5 of the terminal cell.

Effects of the Invention The electrolyte stirring device of the present invention uses the gas generated by the battery to stir the electrolyte, has a high stirring speed, and can also be expected to have a cooling effect that equalizes the temperature difference between the top and bottom of the storage battery. Furthermore, the present invention has a simple structure in which a gas generating electrode is attached to the liquid circulation unit of the first stage cell and the liquid circulation unit of each cell is connected with a tube, so that it can be attached to any battery.

[Brief explanation of the drawing]

The figure is a schematic diagram showing one embodiment of the electrolyte stirring device of the present invention.

Claims (1)

[Claims] In an assembled battery composed of multiple cells, a liquid circulation cylinder is provided vertically in the electrolyte in each cell, and a gas generating electrode placed in the liquid circulation cylinder of the first cell is connected via a switching element. connected to a battery terminal of a cell on a negative potential side from the leading cell, and configured to turn on the switching element with a signal from a potential detection electrode that detects the charging state when the battery is in a charging state; The gas generated from the gas generating electrode circulates the electrolyte in the liquid circulation cylinder upward, and the gas remaining on the electrolyte surface in the cell is sequentially supplied to the liquid circulation cylinder of the next cell, creating a chain reaction. An electrolyte stirring device for a storage battery, characterized in that an electrolyte is circulated upward and a terminal cell is provided with an exhaust section for discharging gas to the outside.