JPS5828182A - Storage battery - Google Patents

Abstract

PURPOSE:To enable measurement of electrolyte to be performed with high accuracy, at a low cost by constituting an electrolyte measuring device from two hollow pipes the lower ends of which are located at different depths in the electrolyte, and which are provided with pressure sensors at their tops. CONSTITUTION:An electrolyte measuring device 5 is constituted by providing pressure detecting parts 8 and 9 of pressure sensors 6 and 7 at its top, and situating two hollow pipes 12 and 13, which have different lengths, are immersed in an electrolyte 4, and have openings 10 and 11 at their lower ends, under the sensors 6 and 7. After that, the device 5 is attached to a container lid 2. When the depths of the openings 10 and 11 of the pipes 12 and 13 from the liquid level of the electrolyte 4 are supposed to be (d1) and (d2), (d2-d1=c), and the pressures detected by the sensors 6 and 7 are supposed to be (p1) and (p2), the specific gravity of the electrolyte 4 is given according to the equation of p= (P1-P2)/c. As a result, measurement of the electrolyte 4 can be performed with high accuracy, at an extremely low cost, without any need of providing a complicate device.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a storage battery equipped with a simple electrolyte measuring device for measuring the specific gravity and liquid level of an electrolyte.

Conventionally, to measure the specific gravity of the electrolyte in a storage battery.

A float type hydrometer is used, or two hollow tubes are placed at different depths of the electrolyte, a certain amount of air is sent into the tubes, and the difference in back pressure is converted into specific gravity. A so-called differential pressure tube type hydrometer was used.

However, the former method has the disadvantage that it requires manual labor and skill because measurements must be carried out to the storage battery each time. In addition, the latter method has the drawback that a constant amount of air must always be supplied to the hollow tube, making the measuring device expensive and requiring space.

The present invention aims to solve these drawbacks, and consists of two storage batteries whose lower ends are located at different depths of the electrolyte, and whose upper ends are equipped with pressure sensors that convert pressure into electrical signals. By being equipped with an electrolytic wave meter 111 device having an empty tube, Anlin's large M
This makes it possible to measure highly concentrated electrolytes.

The present invention will now be described in detail with reference to Figure 1 showing one embodiment of the invention. In the drawing, 21 is a storage battery, L2 is an electric tower, 3 is a positive electrode plate, and a negative electrode plate.

The electrode group consisting of a separator, 4 is an electrolyte.

5 is an electrolyte measuring device, and pressure sensors 6 and 7 are installed at the top end.
The pressure sensitive parts 8 and 9 are arranged, and the lower part is immersed in the electrolytic solution 4, and two hollow holes 12 and 15 having openings 10 and 11 that open at the respective pressure measurement positions are provided at the lower ends. It has a set configuration.

A lead wire 14.15 is led out from the pressure sensor 6.7. The lead wires 14 and 15 are connected to pressure sensors 6 and 7.
It is connected to a display that converts and displays the electrical signals in an appropriate form.

There are 6 types of pressure sensors 6 and 7, but these are capacitive types that convert changes in capacitance between a diamond 7 hum that is displaced in response to measured pressure and a fixed electrode into an electrical signal. is appropriate.

Next, a formula for calculating the specific gravity and liquid level of the electrolytic solution 4 based on the pressure detected by the pressure sensors 6 and 7 will be explained. First, the depth of the opening 10 of the hollow T#12 from the level of the electrolyte L is dl, and the opening of the hollow tube 15-! If the printing thickness of 1ls11 is d2, then the pressures detected by the pressure sensors 6 and 7 are Ps p 1) 1 are respectively pl-ρdl s p
z−ρd! becomes. Note that the specific gravity of the electrolyte is P. By the way, since the distance Q between dl and quadruple is constant, + plP
a"j/) (dt dzL ps-ps-OP, and the specific gravity ρ of the electrolyte can be calculated from #P-(pt-pg)10. Also, regarding the liquid level of the electrolyte, 9For example, the opening of the hollow tube 12 Using the position of section 10 as a reference, the specific gravity of the electrolyte has already been calculated, so pl-ρdxpeix-
It can be easily determined using the formula pt/ρ.

According to the present invention, there is no need to bring the pressure sensor into contact with an electrolytic solution, so there is no need to particularly consider the acid resistance of the pressure sensor. Further, as the pressure sensor, any one for measuring gauge pressure, absolute pressure, or differential pressure can be used.

In the above embodiment, if the air inside the hollow tubes 12 and 15 escapes due to the rocking of the storage battery and enters the tubes 12 and 15, an error will occur in the measured value.

By setting the diameter of the hollow tube 12.13 to 3 to 511M, there is no problem.

However, if this point is further considered, the hollow tube 12 of the embodiment shown in FIG. By filling i3 with a liquid that has a lower specific gravity than the electrolyte, such as lance oil, it is also possible to prevent measurement errors due to a decrease in the volume of air in the hollow tube 12 and 13 due to changes in electrolyte pressure. It is. In addition, by placing a flexible membrane on the opening part 10.11 of the hollow tube 12°, it is possible to prevent air from escaping due to the rocking of the storage battery. By filling the container with liquid, measurement errors can be minimized.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing an embodiment of the present invention. Applicant Yuasa Battery Co., Ltd. Figure 1

Claims (1)

[Scope of Claims] 1) An electrolytic solution measuring device having two hollow tubes each having a lower end located at a different depth of the electrolytic solution and a pressure sensor for converting the pressure into an electric 9L signal arranged at the upper end. A storage battery characterized by: 2) The storage battery according to claim 1, wherein the hollow tube is filled with a liquid that does not mix with the electrolyte and has a specific gravity lower than that of the electrolyte. 5) The storage battery according to claim 1, characterized in that a flexible membrane is disposed at the lower end of the hollow tube. 4) The storage battery according to item 6 of the tokko glaze, characterized in that the hollow tube is filled with liquid.