Measurement circuit for a modular system of electrical cells connected in series, in particular for a system of the storage batterytype
First Claim
1. A measurement circuit for a modular system of cells that are electrically connected in series, each being constituted by one or more elements for producing, storing or converting electrical energy, said circuit incorporating a common measurement transducer plus individual measurement interfaces for the various cells, each of which interfaces includes its own generator for determining a measurement signal representative of some varying characteristic of the cell to which the interface in question is allocated, each interface having a measurement signal output connected to the common measurement transducer via a single-wire link common to all of the interfaces, each of said interface responds to receiving a first control impulse by transmitting to the common transducer the measurement signal as produced by its own generator, and then relays to a following interface any subsequent control pulses it receives before the end of a determined limiting time period after an immediately preceding control pulse, wherein each interface includes two ports operable in alternation such that one acts as an input for control pulses transmitted to the interface while the other acts as an output for such pulses after they have been received, the port selected as the input for any new control pulse train being that one of said ports which receives the first pulse of a train.
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Accused Products
Abstract
The circuit has a common measurement transducer together with individual measurement interfaces for each of the cells. Each interface has its own generator for defining a measurement signal relating to a characteristic of the associated cell, and each of the interfaces has its own measurement signal output that is connected to the measurement transducer of the circuit via a common single-wire link. Each interface also includes two ports, operable in alternation so that one constitutes an input for control pulses transmitted to the interface while the other acts as an output for relaying such pulses after they have been received. Each interface also includes means for forcing a signal to be emitted via its measurement signal output to the measurement transducer of the circuit in the event of a threshold being crossed by a measurement element that monitors a characteristic of the cell with which the interface is associated.
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Citations
4 Claims
- 1. A measurement circuit for a modular system of cells that are electrically connected in series, each being constituted by one or more elements for producing, storing or converting electrical energy, said circuit incorporating a common measurement transducer plus individual measurement interfaces for the various cells, each of which interfaces includes its own generator for determining a measurement signal representative of some varying characteristic of the cell to which the interface in question is allocated, each interface having a measurement signal output connected to the common measurement transducer via a single-wire link common to all of the interfaces, each of said interface responds to receiving a first control impulse by transmitting to the common transducer the measurement signal as produced by its own generator, and then relays to a following interface any subsequent control pulses it receives before the end of a determined limiting time period after an immediately preceding control pulse, wherein each interface includes two ports operable in alternation such that one acts as an input for control pulses transmitted to the interface while the other acts as an output for such pulses after they have been received, the port selected as the input for any new control pulse train being that one of said ports which receives the first pulse of a train.
Specification