JPS5830078A - Storage battery - Google Patents

Abstract

PURPOSE:To enable the electrolytic solution in a storage battery to be measured at low cost and with high accuracy, by disposing a hollow pipe so that respective ends of said pipe are located in different depth of the electrolytic solution, and by providing on the way of said pipe a differential pressure type-pressure sensor which converts a pressure into an electric signal. CONSTITUTION:In this figure, 1 is a battery jar of a storage battery, 2 is a lid of the battery jar, 3 is an electrode group consisting of positive plates, negative plates and separators, and 4 is electrolytic solution. 5 is an electrolytic solution- measuring device, which is composed of a hollow pipe 8, a differential pressure type-pressure sensor 9, and an outgoing-wire 10, that is, said hollow pipe 8 is disposed so that respective ends 6 and 7 are located in different depth of the electrolytic solution 4, said differential pressure type-pressure sensor 9 is disposed on the way of said hollow pipe 8 so that the pressure difference between pressures at respective ends of said hollow pipe can be detected, and said outgoing-wire 10 is a wire taken out of said pressure sensor outside of the battery; said outgong-wire 10 is connected to an indicator in which electric signals from the pressure sensor 9 can be converted into suitable forms and indicated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a storage battery equipped with a simple electrolyte specific gravity measuring device for measuring the specific gravity 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 to a ratio of 1. . A so-called differential pressure tube type hydrometer was used.

However, the former method has the disadvantage that it requires manpower and skill since it is necessary to go to the storage battery and measure it each time. In addition, the latter method has the disadvantage that a constant amount of air must always be supplied to the hollow tube, making the measuring device expensive and consuming space.

The present invention aims to solve these drawbacks, and consists of arranging hollow tubes such that their respective ends are located at different depths of the electrolyte, and applying pressure to the middle of the hollow tube. By equipping an electrolyte specific gravity measuring device with differential pressure sensors that convert into signals arranged so that the pressure difference at each end of the hollow tube can be detected, it is possible to measure the electrolyte at a low cost and with high precision. The measurement will be explained in detail using possible drawings.

In FIG. 11 showing an embodiment of the present invention, 1 is a storage battery container, 2 is a container structure, 3 is an electrode group consisting of a positive electrode plate, a negative electrode plate, and a separator, and 4 is an electrolytic solution. Reference numeral 5 denotes an electrolytic solution measuring device, which includes a hollow 118 arranged such that each end 6 and 7 is located at the depth where the electrolytic solution 4 rises, and a hollow tube 8 at each end 6 and 7 of the hollow tube 8. It consists of a differential pressure type pressure sensor 9 placed in the middle of the scissors hollow t8 so that the pressure difference can be detected, and a drawer [10] drawn out from the pressure sensor 9 to the outside of the storage battery. is connected to a display that converts and displays the electrical signals in an appropriate form.

Differential pressure sensor? Although there are various types of -9, an electrostatic capacitor type that converts the change in capacitance between the diaphragm and the identified electrode in response to measurement pressure into an electrical signal is suitable.

In addition, in this seventh embodiment, if the air inside the hollow tube 8 escapes due to the rocking of the storage battery and gets mixed into the tube 8, it will cause an error in the measured value. If you do this, there won't be much of a problem.

Next, a formula for calculating the specific gravity of the electrolytic solution 4 based on the pressure detected by the differential pressure sensor 9 will be explained. First, if the distance between the ends 6 and 7 of the hollow w8 is O, then the differential pressure sensor 9
The differential pressure P detected by is P−, where P is the specific gravity of the electrolyte
ρ0, and the specific gravity ρ of the electrolyte can be calculated from pp,'a·.

Although one embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to these, and various embodiments can be considered without departing from the spirit thereof.

For example, by filling the hollow t8 in the above embodiment with a liquid such as transformer oil that has a specific gravity lower than the electrolyte, it is possible to prevent measurement errors due to a decrease in the volume of air in the hollow tube due to changes in electrolyte pressure. It is.

Furthermore, by arranging a flexible membrane at the ends 6 and 7 of the hollow tube 8, it is possible to prevent air from escaping due to the rocking of the storage battery. By filling with liquid, the 11g error 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)

[Claims] 1) Hollow tubes are arranged so that each end thereof is located at a certain depth of the electrolyte, and 1. A storage battery comprising an electrolyte specific gravity measuring device in which sensors are arranged such that a pressure difference at each end of the hollow tube can be detected. 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. 3) The storage battery according to claim 1, characterized in that a fusible extension is arranged at the end of the hollow tube. 4) The storage battery according to claim 6, wherein the hollow tube is filled with liquid.