Operation of batteries D-0,1. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Operation of batteries D-0,1. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Chargers, batteries, galvanic cells

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It is known that in the electrochemical systems of sealed nickel-cadmium batteries during operation, irreversible changes accumulate [1], leading to a loss of capacity and an increase in internal resistance. When batteries work in a battery, this leads to the failure of the entire battery, swelling of individual batteries.

In non-separable batteries 7 D-0,115-U1.1 [2, 3], which are commercially available, seven disk nickel-cadmium batteries D-0,115D are connected in series. selected by capacity with a spread of no more than 3 ... 4%. Sometimes after a two or three-fold warranty period (for batteries - 15, and for batteries - 14 months from the date of sale), under the influence of the mentioned changes, the uniformity of the batteries of the battery is disturbed, and it fails due to the failure of usually only one battery. At the same time, a long experience of working with D-0.115D batteries and batteries from them shows that some specimens retain almost full performance even after a six-fold warranty period.

All this leads to the conclusion that it is advisable for radio amateurs dealing with battery-powered radio receivers and other equipment not to use ready-made 7D-0.1 batteries, but self-made ones, made up of seven separate batteries. The design of such a battery, which does not have welded current leads between the batteries, should ensure its easy disassembly and free control of their condition, timely replacement of batteries that have exhausted their life. The battery must be freely placed in the compartment, the power supply of the receiver and in the charger.

Home-made batteries must be opened and inspected 2-3 times a year, and, if necessary, a deposit of released salt should be removed from the surface of the batteries. Plaque is removed with a cotton swab soaked in alcohol (or cologne), a flatly sharpened match, and a diligent ink eraser. The electrical contact between the batteries must be reliable. It is advisable to provide a longitudinal slot in the battery case in order to be able to control the voltage of the batteries without disassembling the battery.

To control the health of the batteries in the battery, an avometer is usually used [4]. In the absence of an avometer, you can use the following proven method. The battery is connected to the receiver, turned on and tuned to a clearly audible station that transmits a speech program. A known good charged battery is connected in turn to each battery in parallel and the volume of the sound of the receiver is compared. A sudden rise in volume will indicate a bad battery. This battery is put on charge and if it "does not hold" capacity, it is rejected.

In a self-made collapsible battery, you can fully realize the individual resource of all batteries. This could somewhat reduce the growing need for chemical current sources to power small transistor receivers.

Literature

1. Folk S. Uno. Salkind AI Alkaline storage batteries NY Wiley, 1969 p.461-462.
2. GOST 21446-75. Rechargeable battery 7D-0,115-U1-1.
3. GOST 11258-79. Accumulators sealed disk, nickel-cadmium alkaline.
4. L. Lomakin. Repair of the battery 7D-0.1.- Radio, 1985, No. 3 p. 56.
5 Tenkovtsev V. V., Levy M. Sh.-N. Sealed cadmium-nickel batteries for general purposes. - M .: Informstandartelectro, 1968, p. 40
6. V. Mamonov. Repair of rechargeable batteries 7D-0.1.- Radio, 1965, No. 3 p. eighteen.
7. Tennovtsev V., Levi M., Drachev V. Cadmium-nickel batteries. - Radio, 1968, No. G, p. 57-59.

Author: B. Petrovsky, Moscow; Publication: N. Bolshakov, rf.atnn.ru

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