Saft-Societe Des Accumulateurs Fixes Et De Traction

Pierre Godard

Michel Billot

Daniel Lelaidier

Robert Henri Lapuyade

Claude Prevot

Jean-Claude Geoffroy

The invention relates to a method of controlling the heating of a chamber and to a controlled installation for heating a chamber. Circulation of a heat-conveying fluid between a solar energy collector (CS) and a water heater chamber (10) is stopped when the temperature t.sub.A of a sensor placed at the outlet of the collector is lower than the temperature t.sub.B of a sensor placed at the inlet of the heat exchanger of the water heater, and also when the temperature t.sub.B is lower than or equal to the temperature t.sub.C of a sensor placed at the outlet of the heat exchanger. Application to producing domestic hot water.

Method of controlling the heating of a chamber and a controlled

The invention relates to an automatic switching arrangement for two batteries which are charged in parallel and discharged in series. The arrangement includes a control unit and a charging circuit; the control unit is a circuit which includes a transistor (T1), a resistor (R1) and a diode (D1) which is connected between two terminals of opposite polarities of the batteries (BT1) and (BT2), the transistor being blocked or conductive according to the direction of the voltage at the terminals of the diode; the transistor controls switching units (T2,T3) of the charging circuit. A switch (CT4, Th, CT11) can be disposed in series with the diode (D1). Application to stand-by batteries.

Automatic switching arrangement for two batteries which are charged in

Circulation of a heat-conveying fluid between a solar energy collector (CS) and a water heater chamber (10) is stopped when the temperature t.sub.A of a sensor placed at the outlet of the collector is lower than a temperature t.sub.B +Dt, where the temperature t.sub.B is that of a sensor placed at the inlet to the heat exchanger of the water heater, where a temperature t.sub.C is that of a sensor placed at the outlet of the heat exchanger, and Dt is a temperature offset which increases with a decrease in the temperature difference t.sub.B -t.sub.C.

A heat control device for a space heated primarily by means of a heat pump and having an auxiliary makeup heater comprises a room temperature measurement circuit (100), a makeup heat control circuit (200), a current control circuit (500) of a heat pump, and a measurement circuit (600) of the temperature of the exchange fluid of the pump whose information is transmitted both to the circuit (200) and to the circuit (300). Application to household heating.

Temperature control device for a heat pump

An aleatory source of energy, e.g., a battery of photocells (1), supplies energy to a load (5) and to a storage battery (3). When the source is supplying more energy than is being drawn by the load, the storage battery is charged; when the source is supplying less than the demand, the shortfall is made up by drawing energy from the storage battery. The state of charge of the storage battery is monitored by a meter (8) which governs a regulator (7). Once the battery is charged to a predetermined threshold, the amount of current it draws from the source is regulated, and energy supplied by the source in excess of the combined requirements of the load and of battery charging is diverted to a storage means (6) other than the storage battery (e.g., a mains electricity supply grid). The flows of energy to both the battery and the other storage means are controlled by the regulator (7) as a function of the state of charge of the battery.

Apparatus for regulating the charging of a storage battery

The invention relates to electronic warning devices. The control system includes means for supplying an accurate clock signal and a divider (CD1, CD2) for dividing the clock signal to obtain an audio frequency, adjusting the mark/space ratio of the audio frequency for application to a power transistor (T6), said transistor driving a loudspeaker (HP), providing a cyclic modulation for modulating the clock frequency; and timing the duration of the sound emission of the loud speaker. The timing functions can all be provided without the use of electrolytic capacitors as would otherwise have been necessary, thereby avoiding problems due to the lack of precision and drift in the values of such capacitors.

System for controlling an electronic warning device

A method of charging a secondary electric battery from a primary source of electric current, the secondary battery being connected to supply an intermittent load that draws a current which is greater than the primary source is capable of supplying the method comprising recording the quantity of electricity discharged by the secondary cell, charging the secondary battery at a first rate from the beginning of its discharge, and continuing the charging at the said first rate for a period of time which is a function of the recorded discharge.

Method and device for charging secondary electric batteries by primary

Method and apparatus for charging storage batteries in which the charging rate is varied as a function of temperature are disclosed. The battery temperature and ambient temperature are sensed and compared. When the battery temperature is less than the ambient temperature plus a first temperature difference, a first charging rate is provided; when the battery temperature is greater than the ambient temperature plus the first temperature difference but less than the ambient temperature plus a second temperature difference which is greater than the first temperature difference, an intermediate charging rate is provided which varies with the comparison of the battery and ambient temperatures between the first charging rate and a second charging rate which is less than the first charging rate; and when the battery temperature is greater than the ambient temperature plus the second temperature difference, the second charging voltage is provided. Alternatively, charging may be cut-out instead of proceeding at the second charging rate. The method disclosed herein may advantageously be used to charge all types of storage batteries.

Method and apparatus for charging storage batteries

A system and method for effecting rapid safe charging of sealed storage cells embodying a charger to supplying a rapid high rate charging current to the cells or battery of cells with interruption but once during charging, at an optimum time to prevent cell or battery damage, the timing of this interruption being effected by change in magnitude of a continuous control signal by means incorporated in the cell or battery. This magnitude changes when voltage across the cell terminals increases above a reference voltage that varies with change in battery or cell temperature, the change in said magnitude of the control signal serving to effect interruption of rapid charging. Subsequent to this interruption charging at a slower rate proceeds to complete the charge of the sealed cell or battery of such cells.

Rapid charging system and method for sealed storage cells

Method for charging a sealed storage cell battery according to which the battery is heated when its temperature lies below a determined value and the intensity of the charge current is lowered by being shunted to heat the battery when the voltage of the battery reaches a given value, characterized in that the said value of the voltage of the battery supplies the signal which causes the heating of the battery; and device for implementing the method.

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Tremblay les Gonesse, France

Pierre Godard