JPH0119329Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bulk water replenishment device for storage batteries installed in a large-scale storage battery group for power storage or the like.

BACKGROUND ART Generally, storage batteries used for purposes such as power storage are formed by connecting several hundred to several thousand large-capacity storage batteries in series and parallel, and have a capacity of several MWh to several tens of MWh.

As shown in Figure 1, the bulk water replenishment system for storage batteries when installed in such a large-scale storage battery group is as follows:
A main piping pipe 2 is connected to a water supply tank 1, a branch piping pipe 3 is connected to the main piping pipe 2, and the branch piping pipe 3 is connected to an automatic constant liquid level replenishing valve 4 provided in each cell. Furthermore, an automatic opening/closing valve 5 (for example, a solenoid valve, etc.) is provided between the water supply tank 1 and the branch piping pipe 3 to control the supply of water from the water supply tank 1 to the main piping system.

In addition, in the figure, 6 is a cell and 7 is an exhaust plug. In such a conventional configuration, the arrangement of the main piping pipe 2 and the branch piping pipe 3 and the connection between the two are usually based on distributing supplementary water evenly to each cell from the viewpoint of necessary functions, and also due to manufacturing considerations. For simplicity, branch pipes have been constructed with a branch structure that simply branches off the pipeline from the bottom or side of the main pipe, as shown in FIGS. 1 and 2. However, when refilling water with such a piping system, the water replenishment function for each cell is fully demonstrated, but from the time water replenishment is completed until the next water replenishment time, the water replenishment valve 4 of each cell is Since each cell is connected in a ventilated state through the main piping 2 and the main piping 2, there is a risk that gas generated during charging, which is normally discharged from the exhaust plug 7 provided in each cell, may enter the main piping 2. had. Under such conditions, if one storage battery were to explode for some reason, there was a risk that all of the storage batteries connected to the water replenishment system through the main pipe 2 would explode. .

The collective water replenishment system for storage batteries of the present invention solves the above-mentioned drawbacks, and it connects the main piping to the water tank via an automatic on-off valve, and connects the branch piping in parallel to the main piping. In a structure in which a branch piping pipe is connected to an automatic constant liquid level filling tap provided in each cell, the main piping pipe is installed at a position lower than the filling opening position of the automatic constant liquid level filling valve, and the branch piping is By opening the pipe near the bottom of the main piping and connecting it to the main piping, water that has accumulated in the main piping located at a low position can be prevented even after water replenishment until the next water replenishment. Most of the water is retained as surplus water, excluding the amount lost through natural evaporation, and a branch pipe is opened in the surplus water to form a water seal structure, so as to exhibit the explosion prevention function of the storage battery. This is what I did. The reason why the main piping pipe is set lower than the refilling opening position of the automatic constant level refilling valve is because after refilling is completed, the refilling valve float is lowered as the liquid level in the cell drops, and the refilling opening is opened. This is to prevent surplus water in the main piping from flowing into the cell through the opening through the piping tube due to siphon action.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The collective water replenishment device for storage batteries of the present invention will be specifically described below using embodiments shown in the drawings.

Figure 3 is a schematic configuration diagram showing an embodiment of the bulk water replenishment device for storage batteries of the present invention, and Figures 4 and 5 are
FIG. 2 is a perspective view and a cross-sectional view of essential parts of the embodiment of the present invention shown in the figures. Further, in FIGS. 3, 4, and 5, the same reference numerals as in FIG. 1 indicate the same operating members. In such an embodiment, the main plumbing pipe 2
As shown in FIGS. 3 and 5, the water refill opening 8 of the automatic constant liquid level refill valve 4 is installed in the piping at a lower position. Further, as shown in FIGS. 3, 4, and 5, the branch pipe 3 opens near the bottom of the main pipe 2 and is connected to the main pipe 2. In addition, the connection between the branch piping pipe 3 and the automatic constant liquid level filler valve 4 is specifically made by using a piping tube 9 made of soft synthetic resin, rubber, etc., as shown in FIG. This is done to ensure that there is no liquid leakage, airtightness, etc. at each joint of the automatic constant liquid level supplementary faucet 4.

FIG. 6 shows another embodiment in which the main piping 2 and the branch piping 3 are arranged alternately so as to be slightly inclined from the vertical line of the cross section of the main piping. The pipe is configured to open near the inner bottom of the main piping pipe. Even in this case, the same water sealing effect can be obtained, and in particular, when the respective branch piping pipes are drawn out in close proximity to each other, this makes it easier to perform operations such as fitting the piping tubes together. In the figure, the same reference numerals as in FIG. 4 indicate the same operating members.

In the embodiment of the present invention, there is no surplus in the main piping pipe 2 and the branch piping pipe 3 even during water refilling or when water refilling is completed, and even in the state before refilling when the electrolyte level has dropped due to daily charging and discharging of the storage battery. Since water remains and each branch piping pipe 3 is water-sealed, explosive gas is transferred to the main piping pipe 2 through the automatic constant liquid level filler valve 4 of each cell.
Even if explosive gas were to enter the main piping 2 due to some circumstances, the branch piping 3 is water-sealed, so that the gas in each cell will be transferred to the main piping 2. Therefore, there is no risk of explosion.

As described above, the bulk water replenishment device for storage batteries of the present invention is
Since the connection between the main piping pipe and the branch piping pipe has a water seal structure, there is no risk of explosion even when used as a bulk water replenishment device for a storage battery group consisting of hundreds to thousands of cells, ensuring safe water replenishment. It has excellent advantages such as ability to perform functions.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram showing an example of a conventional bulk water replenishment system for storage batteries, and Fig. 2 is a cross section of a main part showing an example of the connection structure of the main piping pipe and branch piping in the bulk water replenishment system for storage batteries shown in Fig. 1. Figure 3 is a schematic configuration diagram showing an embodiment of the collective water replenishment system for storage batteries of the present invention, and Figures 4 and 5 are connection structures of the main piping pipe and branch piping pipe in the embodiment of the present invention shown in Figure 3. A perspective view and a cross-sectional view of the main parts showing the same, etc., No. 6
The figures show another embodiment of the connection structure between the main pipe and the branch pipe in the collective water replenishment system for storage batteries of the present invention, in which a is a perspective view of the main part and b is a sectional view. 1...Water supply tank, 2...Main piping pipe, 3...Branch piping pipe, 4...Automatic constant liquid level refill valve, 5...Automatic on-off valve.

Claims (1)

[Scope of utility model registration request] Connect the main piping pipe to the water supply tank via an automatic on-off valve, connect the branch piping pipe in parallel to the main piping pipe, and connect the branch piping pipe to the automatic constant liquid level refill valve provided in each cell. In the collective water refilling device for storage batteries, the main piping pipe is installed at a position lower than the refilling opening position of the automatic constant level replenishing tap, and the branch piping pipe is opened near the inner bottom of the main piping pipe. A bulk water replenishment device for storage batteries that is connected to the main piping.