Dcns

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Naval Group

Nicolas Pierre

Daniel Chatroux

Sebastien Carcouet

Sébastien Carcouet

Jacques Ecrabey

Etienne Durand

Cyrille Garans

Bernard Keruel

Disclosed is an overcharge detection method for detecting an overcharging of an accumulator of a battery including a set of parallel branches each including accumulators disposed in series, wherein the method includes steps of: (i) collecting the measurements of the currents flowing in the branches of the battery; (ii) identifying at least one variation in current in one branch with respect to at least one other branch as a function of the measurements of current collected; (iii) determining a level of state of charge of the branch; and (iv) detecting an overcharging of an accumulator in the branch as a function of at least the variation in current identified and of the level of state of charge determined.

Method and device for detecting an overcharging of an accumulator of a battery

Disclosed is a submarine provided with lithium-ion battery-based electricity storage, assuming the form of associated individual storage elements (), each element () being provided with an electronic connecting and operation management card (), in which: the associated individual storage elements () are arranged in a row; each electronic card () of an element of a row () is mechanically and electrically connected, at its ends (), to the electronic cards () of the row () that are its closest neighbors, to form a strip of cards () for this row (); this strip of cards () can be manipulated by an operator from at least one of its ends and is able to slide relative to the storage elements () of the row ().

Submarine provided with rows of power storage means

An electrical apparatus, including: a circuit breaker having a breaking capacity and a breaking current; a DC voltage source including two batteries connected in parallel, connected in series with the circuit breaker, the sum of short-circuit currents of the batteries being greater than the breaking capacity, each battery including: a first branch including storage batteries and a switch connected in series; a second branch connected in parallel with the first branch and including a free-wheeling diode; an ammeter measuring output current; and a control circuit configured to detect a short-circuit. The control circuits simultaneously keep a majority of switches open and close one switch to apply a current passing through the circuit breaker which is higher than the breaking current and lower than the breaking capacity.

Protecting a power supply including a plurality of batteries in parallel against an external short-circuit

Growing community of inventors

Quimper, France

Nicolas Pierre