Method for controlling the supply of power by means of a power supply device (14, 16, 24) in a power supply of a motor vehicle with the steps: a) recording data concerning the environment of the motor vehicle by means of at least one environmental sensor (20a, 20b); b) assessing a potential collision of the motor vehicle with an object in the environment of the motor vehicle based on the data recorded by the at least one environmental sensor (20a, 20b), by selecting an assessment (BW1, BW2, BW3, BW4) from at least two determinable assessments (BW1, BW2, BW3, BW4), wherein the at least two determinable assessments (BW1, BW2, BW3, BW4) characterise a collision of the motor vehicle with an object; and c) controlling the supply of power in the power supply of the motor vehicle according to a determinable control specification (SV1, SV2, SV3, SV4) as a function of the selected assessment (BW1, BW2, BW3, BW4), wherein a specific control specification (SV1, SV2, SV3, SV4) is assigned to each of the at least two determinable assessments (BW1; BW2; BW3; BW4); characterised in that the at least one environmental sensor (20a, 20b) can deliver motion, position and type information of different traffic participants, that the method allows an adaptation of the controlling of the supply of power to the severity of an accident, the at least two determinable assessments (BW1, BW2, BW3, BW4) characterise the collision of the motor vehicle with the object regarding the influence of the collision on the power supply device (14, 16, 24), a first assessment is selected if a collision of the motor vehicle with the object which is slight with respect to the influence of the collision on a power supply device (14, 16, 24) is assessed as non-critical, wherein the first assessment is assigned to a first control specification, a second assessment is selected if a collision of the motor vehicle with the object which is serious with respect to the influence of the collision on a power supply device (14, 16, 24) is assessed as very critical, wherein the second assessment is assigned to a second control specification, the first control specification prescribes that a reversible interruption of the supply of power takes place, and the second control specification prescribes that an irreversible interruption of the power supply in the context of the motor vehicle control is carried out, wherein internal protections present in a power supply device (14, 16, 24) are reversibly opened for the reversible interruption, such that no power is provided externally by the power supply device (14, 16, 24) and the irreversible interruption is implemented by a pyrotechnical separation of a power line, such that no power is provided externally by the power supply device (14, 16, 24), and that a probability, a course and a severity of the potential collision of the motor vehicle with the object and an impact region between motor vehicle and object and an impact angle between motor vehicle and object and a relative speed (v2-v1) between motor vehicle and object and a likely impact time of the object on the motor vehicle and a potential deformation of the motor vehicle and the stresses to be expected on the electric components are assessed by the at least two assessments (BW1, BW2, BW3, BW4), wherein in the case of a reversible interruption of the supply of power the management device of the power supply device (14, 16, 24) allows a driver of the vehicle to reclose the internal protections and to automatically activate the power supply device (14, 16, 24) and in the case of an irreversible interruption of the supply of power the management device guarantees to the power supply device (14, 16, 24) that only specialist personnel can change the power supply device (14, 16, 24) into an active state by inputting a code. a) recording data concerning the environment of the motor vehicle by means of at least one environmental sensor (20a, 20b); b) assessing a potential collision of the motor vehicle with an object in the environment of the motor vehicle based on the data recorded by the at least one environmental sensor (20a, 20b), by selecting an assessment (BW1, BW2, BW3, BW4) from at least two determinable assessments (BW1, BW2, BW3, BW4), wherein the at least two determinable assessments (BW1, BW2, BW3, BW4) characterise a collision of the motor vehicle with an object; and c) controlling the supply of power in the power supply of the motor vehicle according to a determinable control specification (SV1, SV2, SV3, SV4) as a function of the selected assessment (BW1, BW2, BW3, BW4), wherein a specific control specification (SV1, SV2, SV3, SV4) is assigned to each of the at least two determinable assessments (BW1; BW2; BW3; BW4);