Electro-hydraulic brake device

An electro-hydraulic brake device comprising:

• a main brake unit connected to and configured to provide a braking fluid to a plurality of wheel cylinder units of a vehicle, the plurality of wheel cylinder units respectively coupled to a plurality of wheels of the vehicle, configured to perform wheel braking of the vehicle using the provided braking fluid, and including one or more first wheel cylinder units and one or more second wheel cylinder units;
• a storage unit connected to the main brake unit and having a storage space for storing the braking fluid;
• and
• an auxiliary brake unit connected to the main brake unit and the storage unit and configured to provide the braking fluid to at least some of the plurality of wheel cylinder units when an operation error occurs at the main brake unit, wherein a hydraulic circuit is physically divided in the auxiliary brake unit wherein the auxiliary brake unit comprises:
• a first auxiliary flow path unit configured to control a flow of the braking fluid from the main brake unit to the one or more second wheel cylinder units;
• a second auxiliary flow path unit configured to control the flow of the braking fluid from the first auxiliary flow path unit to an electric pump unit and
• a third auxiliary flow path unit configured to control the flow of the braking fluid from the electric pump unit to the first auxiliary flow path unit.