Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1984-07-19
1987-06-16
Hickey, R. J.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 48, 320 23, 322 28, 322 99, H02J 714
Patent
active
046738622
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a method for recharging a chargeable battery for a vehicle, a machine, a motor boat or the like, whereby the output voltage from a battery charging generator connected to the battery is used as a charging voltage the magnitude of which can be varied by controlling the field of the generator and whereby the recharging is performed by means of repeated charging cycles each of which consists of a charging period and a test period during which the battery is loaded and the charging from the generator to the battery is disconnected. The magnitude of the charging voltage during a charging period is determined with regard to the test result achieved during the immediately preceding test period. The invention also relates to a charging regulator for recharging of a rechargeable battery for a motor vehicle, a machine, a motor boat or the like, said regulator being connected to a line between the battery and a battery recharging generator of a type in which the output voltage thereof can be varied by varying the magnetizing current of the generator. During repeated charging cycles each of which consists of a test period and a charging period, the regulator interrupts the charging during each test period while the battery is loaded in order to measure the charging condition of the battery and to control the output voltage of the generator during the next following charging period, depending on the detected charging condition.
In recent years battery run electrical equipment such as, for example, refrigerators, heaters and radio equipment has become more and more common in, for example, long distance trucks and motor boats. As such equipment consumes a substantial current compared with the equipment that was previously conventional, the new equipment produces a bigger load on the battery, especially as the generator and its regulator are designed to provide current only when the engine that drives the generator, as well as the vehicle or boat, is running. If the engine has not been running for a couple of hours while one or more of the above items of equipment has been connected, the battery is normally more or less discharged.
In accordance with one aspect of the present invention there is provided a method for recharging during operation a chargeable battery connected to an electrical system of a motor vehicle, a machine, a motor boat or the like wherein the output voltage from a generator connected to the battery is used as a charging voltage the amplitude of which can be varied by controlling the field of the generator, and wherein the recharging is performed by one or repeated charging cycles during which the charging is performed at a raised charging voltage which, by controlling the output voltage of the generator, is just below the upper limit of the range of operating voltage of the electrical system.
In accordance with a further aspect of the present invention there is provided a voltage regulator for recharging during operation a rechargeable battery which is connected to an electrical system of a motor vehicle, a machine, a motor boat or the like, said regulator being connected to a line between the battery and a generator having an output which can be varied by varying the magnetizing current of the generator, wherein the regulator comprises a control device arranged to define cyclic charging periods of equal time during which, by controlling the magnetizing current of the generator, there is applied to the battery an increased voltage which is just below the upper limit voltage value of the electrical system.
Other features and characteristics of the present invention will be obvious from the following specification in conjunction with the enclosed drawings in which:
FIG. 1 is a block diagram showing a conventional charging regulator system;
FIG. 2 which corresponds to FIG. 1 illustrates a charging regulator system according to the present invention;
FIG. 3 is a flow chart which shows how a charging regulator according to the invention functions;
FIGS. 4-6 show by a dotted and a
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