SU720582A1 - Device for indicating the end of charge of storage battery - Google Patents

Description

The invention relates to the electrical industry and can be used in the operation of electric batteries.

Known indicator of the end of battery charge, made in the form of a sealed float with a built-in concave membrane with a metal ball on its surface and an induction coil mounted under the membrane [1].

The disadvantage of this indicator is that there is a need for a sensitive amplifier. voltage arising in the induction coil 15; In addition, there are parasitic voltages created by vibration of the battery case.

It is also known a device for indicating the end of charge of the battery, made in the form of a hollow plug and a sensor made of metal contacts in the form of plates placed in the cavity of the plug, in which, in order to improve accuracy, the lower ends of the contacts are located at a distance equal to the size of the electrolyte drop (2].

A known device for indicating the end of a battery charge has!

the following disadvantages: insufficient degree of accuracy with vibration of the battery case, at different temperatures and electrolyte concentrations, limited use at various positions of the object on which the device is installed; the comparative complexity of the practical determination of the magnitude, droplet of the electrolyte and, consequently, the distance between the metal contacts corresponding to the state end of battery charge; the possibility of accidental discharge of electrolyte in the state of the battery that does not correspond to the end of the charge, and, therefore, the possibility of issuing false information about the end of the charge; a comparatively large dependence of the operation of the device on the intensity of the electrolyte boiling.

The purpose of the invention is to increase the accuracy of work and expand the scope.

To achieve this, the sensor is made in the form of a piezoelectric element with a ferromagnetic plate and an elastic sensing element with a permanent magnet facing the ferromagnetic plate.

The drawing schematically shows a device.

It consists of a hollow plug 1, equipped with a shank 2 with a thread and a Central hole 3 and a cover 4 with openings 5 for gas outlet. An elastic sensing element 6, for example, made in the form of a membrane, is placed in the lid 4. A permanent magnet 7 is mounted on the elastic sensor element 6 so that the deflection of the elastic sensor element b under the action of the pressure of gases released during the charge corresponding to the end of the battery charge leads to the movement of the permanent magnet 7. A piezoelectric element 8 with fer-15 magnetic plate 9 facing the permanent magnet 7. The permanent magnet 7 is located at such a distance from the ferromagnetic plate 9 that in the discharged state 20 of the battery or in a state different from the end series about bending elastic sensing element 6 and therefore movement 'of the permanent magnet 7 in the direction 25 enzyme ferromagnetic plate 9 occurs, and a signal from the indicator end of the battery is missing.

The contact plate 10 is designed to pick up signals from the indicator of the end of the charge. The role of another contact. the plate is made by a ferromagnetic plate 9. An insulating gasket 11 separates the housing of the cover 4 from the contact plate 10. The current leads 12 pre-, s are assigned to remove piezoelectric voltages from the contact plates 9 and 10 of the piezoelectric element 8.

The operation of the proposed device To indicate the end of the battery charge as follows.

At the end of the charge of the battery, under the influence of increased pressure, the elastic sensitive element b deflects when the gases are charged, which leads to the displacement of the permanent magnet 7 towards the ferromagnetic plate 9. As a result of the interaction of the magnetic fluxes of the permanent magnet 7 and the ferromagnetic plate 9, the latter tends to attract permanent magnet 7, exerting a tensile effect on the piezoelectric element 8, which leads to the removal of the electrical signal indicating the windows from the contact plates 9 and 10 of the piezoelectric element 8 battery charge.

The proposed device for indicating the end of the battery charge significantly increases the accuracy of the device and expands its scope. So, for example, the proposed device can function without substantially changing its parameters, with significant vibrations, in various positions of the object on which it is installed, etc.

Claims (1)

Claim A device for indicating the end of the battery charge, made in the form of a hollow plug with a cover and a sensor placed in it, which consists in the fact that, in order to increase the accuracy of the device and expand its field of application, the sensor is made in the form of a piezoelectric element with a ferromagnetic plate and an elastic sensing element with a permanent magnet facing the ferromagnetic plate.