US 2019/0165584 A1Published application

Architecture of battery modules connected in parallel

AssigneeSaft

InventorsPhilippe Laflaquiere, Younes Jaoui

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Abstract

A battery architecture based on putting n branches of battery modules in parallel associated with a DC/DC converter, the whole being controlled by an intelligent controller. It is thus possible to isolate a branch, connect it to the DC/DC converter and then carry out operations of charging or discharging of this branch using the power available from the battery modules of the n−1 other brandies. At the same time the n−1 other branches remain available for a user. The branch that has been isolated is then reconnected to the other branches to reconstitute the initial system. This architecture makes it possible to carry out operations such as balancing of voltages between modules, determination of the state of charge, and measurement of capacity. This architecture comprises a single voltage step-down/step-up DC/DC converter, bidirectional with respect to current, able to provide, in each branch individually, the charging and discharging of the module or modules of said branch.

Claims15

Dependent claims

A device for controlling battery modules, said device comprising at least two branches connected in parallel, each branch comprising one or more battery modules connected in series, each branch capable of being connected to an internal circuit or to an external circuit,

said external circuit being suitable for:
charging the battery modules of said at least two branches by a charger,
discharging the battery modules of said at least two branches in an electrical consumer;
said internal circuit being suitable for:
charging the battery module or modules of one of the branches by the battery module or modules of one or more other branch(es) and for
discharging the battery module or modules of one of the branches in one or more battery modules of one or more other branch(es);
said device further comprising:
one branch controller per branch, suitable for controlling:
connection to the external circuit and disconnection from the external circuit, of the branch with which the branch controller is associated, and
connection to the internal circuit and disconnection from the internal circuit, of the branch with which the controller is associated, and
a single voltage step-up/step-down DC/DC converter, bidirectional with respect to current, the input of which is connected to the external circuit and the output of which is connected to the internal circuit, able to provide charging and discharging of the module or modules of said branch in each branch individually.

8 more elements

Dependencies are inferred from the claim text.