JPS61190857A - Storage battery - Google Patents

Abstract

PURPOSE:To stir electrolyte by utilizing pressure change of gas by arranging a constant volume tank sealed with a gas outside a storage battery and connecting, through a passage, the tank to a soft body capable of expansion and shrinkage which is accommodated in an electrolyte of a battery. CONSTITUTION:A soft body 2 capable of expansion and shrinkage is arranged in an electrolyte of a storage battery 1, and air or gas is sealed in it, and connected, through a passage 3, to an outside tank 4 having a constant volume arranged outside the buiding. The soft body 2 is expanded by increase in gas pressure caused by atmospheric temperature increase and shrinked by decrease in gas pressure caused by atmospheric temperature decrease, and electrolyte level is raised and lowered respectively, to stir the electrolyte. The electrolyte of the battery 1 is effectively stirred without use of power, and life of the battery is increased.

Description

[Detailed description of the invention] Industrial applications The present invention relates to electrolyte stirring for storage batteries.

Prior art and its problems When a storage battery is used in a shallow charging/discharging process or is charged with a small current, the diffusion of the electrolyte is poor, which causes the concentrations of the upper and lower electrolytes of the storage battery to be different. In other words, the upper electrolyte specific gravity becomes lower, the lower electrolyte specific gravity becomes higher,
Since the specific gravity of the electrolyte becomes non-uniform in this way, the storage battery is adversely affected in terms of capacity and life.

In order to eliminate this negative effect, normally uniform charging is carried out as needed to increase the charging current, and gas is generated from the electrode plates to stir the electrolyte, but in recent years, due to the demand for downsizing of charging equipment, When used in combination with a solar cell as a backup power source for the solar cell, it has become impossible to increase the charging current, and it has become difficult to sufficiently stir the electrolyte.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a long-life storage battery having a non-powered electrolyte stirring function.

Structure of the Invention In order to achieve the above object, the present invention includes a tank having a constant volume outside the storage battery, and a flexible body communicating with the tank that can expand and contract and whose volume fluctuates within the electrolyte of the battery. It is.

Also, a tank with a constant volume is placed outdoors outside the battery room.

EXAMPLE Hereinafter, the present invention will be explained with reference to drawings showing one example thereof.

FIG. 1 is a schematic diagram of the storage battery of the present invention.

1 is a storage battery, 2 is a flexible body that expands and contracts within the electrolyte of the storage battery, and 3 is a communication pipe that communicates with an external tank 4 that does not change in volume outside the storage battery, and inside these,
Air or gaseous gas is enclosed. Since the external tank does not undergo a volume change, an increase in temperature will cause the gas pressure in the external tank to increase. At this time, since the flexible bodies are connected by the communication pipe, the flexible bodies expand due to changes in gas pressure. Furthermore, when the temperature drops, the flexible body also contracts due to the change in gas pressure as the gas pressure in the external tank decreases. In this way, the expansion and contraction of the flexible body causes the level of the battery electrolyte to rise and fall, stirring the electrolyte.

In this case, by arranging the external tank outdoors, changes in temperature and gas pressure are increased, and the electrolyte can be stirred more efficiently.

As a result of comparing the life performance of the storage battery according to the present invention and the conventional storage battery without a stirring function, the life of the storage battery according to the present invention was more than twice as long as that of the conventional storage battery.

It is also possible to connect a plurality of single cells to a tank outside the battery.

Effects of the Invention The present invention can stir the electrolyte of a storage battery without power, and also provides a long-life storage battery, which has great industrial value.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the storage battery of the present invention.

Claims (2)

[Claims] (1) A storage battery comprising a tank with a constant volume outside the storage battery, and a flexible body communicating with the tank that can expand and contract and whose volume fluctuates within the electrolyte. (2) The storage battery according to claim 1, wherein the tank is outdoors.