# US 9,434,256 B2 · Arrangement and method for stabilizing a voltage applied to a first electric consuming device arranged in an onboard power supply system of a vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,434,256 B2 - Document ID: US9434256B2 - Status: Granted - Kind: B2 - Application number: 13/957,750 - Filed: 2013-08-02 - Published: 2013-11-28 - Granted: 2016-09-06 - Earliest claimed: 2011-02-03 - Assignees: Bayerische Motoren Werke Aktiengesellschaft - Applicants: Bayerische Motoren Werke Aktiengesellschaft - Inventors: Hartmut Proebstle; Rupert Neudecker; Sherif Mahmoud - Web page: https://patentgrep.com/patent/US9434256B2 ## CPC - H02J 7/60: including safety or protection arrangements - B60L 1/00: Supplying electric power to auxiliary equipment of vehicles (circuit arrangements for charging batteries H02J7/00) - B60L 1/02: to electric heating circuits - B60L 15/20: for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed - B60L 50/16: with provision for separate direct mechanical propulsion - B60L 50/40: using propulsion power supplied by capacitors - B60L 53/14: Conductive energy transfer - B60L 58/20: having different nominal voltages - B60R 16/03: for supply of electrical power to vehicle subsystems {or for (circuit arrangements for charging batteries H02J7/00)} - H02J 7/1423: {with multiple batteries} - H02J 7/663: {using battery or load disconnect circuits (H02J9/002 takes precedence)} - H02J 7/865: {Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence)} - B60L 2210/40: DC to AC converters - B60L 2220/14: Synchronous machines - B60L 2240/12: Speed - B60L 2240/423: Torque - B60L 2240/441: Speed - B60L 2240/547: Voltage - B60L 2260/26: Transition between different drive modes - H02J 2105/33: exchanging power with road vehicles - Y02T 10/64: Electric machine technologies in electromobility - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - Y02T 10/72: Electric energy management in electromobility - Y02T 90/12: Electric charging stations - Y02T 90/14: Plug-in electric vehicles - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An arrangement and method are provided for stabilizing a voltage applied to a first electric consumer arranged in a vehicle onboard power supply system that includes a second electric consumer. A first voltage supply unit provides a supply voltage; a storage unit stores electric energy; a second voltage supply unit provides a charging voltage; a switching unit is connected to the first consumer, the storage unit, the first voltage supply unit and the second voltage supply unit; and a control unit determines whether a stabilization is to be carried out. If no stabilization is to be carried out, the control unit activates the switching unit such that the first consumer is connected to the first voltage supply unit and, as soon as the stabilization is to be carried out, the first consumer is connected to a series connection formed by the storage unit and the first voltage supply unit. ## Claims ### Claim 1 An arrangement for stabilizing a voltage in a vehicle onboard power supply system having a first, voltage-sensitive electric consuming device and a second, non-voltage-sensitive electric consuming device, comprising: a first voltage supply unit configured to provide a supply voltage; a storage unit configured to store electric energy at least temporarily; a second voltage supply unit configured to provide a charging voltage; a switching unit to which at least the first, voltage-sensitive electric consuming device, the storage unit, the first voltage supply unit and the second voltage supply unit are connected; a control unit operatively configured to determine whether a stabilization of the voltage applied to the first, voltage-sensitive electric consuming device is to be carried out, wherein the control unit is further configured such that: as long as a stabilization is not to be carried out, activate the switching unit to connect the first, voltage-sensitive electric consuming device to the first voltage supply unit and, as soon as the stabilization is to be carried out, activate the switching unit to connect the first, voltage-sensitive electric consuming device to a series connection formed by the storage unit and the first voltage supply unit in order to thereby supply the first, voltage-sensitive electric consuming device with a voltage provided by the series connection in order to compensate for any reduction of the supply voltage that is present, subsequent to stabilization having been carried out, in each case, at least temporarily activate the second voltage supply unit, the second, non-voltage-sensitive electric consuming device and the switching unit, wherein the second voltage supply unit provides the charging voltage having a value greater than the supply voltage of the first voltage supply unit, and electric current flows at least temporarily through the second, non-voltage sensitive electric consuming device, and a charging of the storage unit is made possible by a current path formed by the second voltage supply unit and the second, non-voltage-sensitive electric consuming device. ### Claim 2 (depends on 1) The arrangement according to claim 1, further comprising: an internal-combustion engine of the vehicle; a first electric machine of the vehicle; and wherein the first electric machine is operatively configured for at least temporarily driving the internal-combustion engine, and wherein the control unit is further operatively configured to determine whether a stabilization of the voltage applied to the first, voltage-sensitive electric consuming device is to be carried out in order to evaluate whether at least one of a restarting and additional starting of the internal-combustion engine is to be implemented via the first electric machine. ### Claim 3 (depends on 2) The arrangement according to claim 2, wherein: the restarting of the internal-combustion engine that is to be carried out is detected when a start-driving signal is present in an idle state of the vehicle in which the vehicle is stationary and the internal-combustion engine has stopped or has a rotational engine speed between a rotational shut-off speed and a zero value; and the additional starting of the internal-combustion engine is detected when, in a moving state of the vehicle, an engine torque demand is present, the vehicle moving state being a state in which the vehicle is driving and the internal-combustion engine has stopped or has a rotational engine speed between a rotational shut-off speed and a zero value. ### Claim 4 (depends on 1) The arrangement according to claim 1, wherein the switching unit comprises a first switching element and a second switching element. ### Claim 5 (depends on 4) The arrangement according to claim 4, wherein the storage unit is a capacitor. ### Claim 6 (depends on 4) The arrangement according to claim 4, wherein the storage unit is a super capacitor. ### Claim 7 (depends on 4) The arrangement according to claim 4, wherein the second, non-voltage-sensitive electric consuming device is connected to the first voltage supply unit. ### Claim 8 (depends on 2) The arrangement according to claim 2, further comprising: a second electric machine of the vehicle, the second electric machine being operatively configured to drive driven wheels of the vehicle either alone or in combination with the internal-combustion engine; and wherein the second voltage supply unit is a voltage transformer operatively connected on an input side with a switching circuit containing the second electric machine. ### Claim 9 (depends on 1) The arrangement according to claim 1, wherein the second voltage supply unit is a generator. ### Claim 10 (depends on 1) The arrangement according to claim 1, wherein the control unit is further operatively configured to evaluate a driver entrance signal and, when a driver entrance is detected, initially charge the storage unit. ### Claim 11 A method of stabilizing a voltage applied to a first voltage-sensitive electric consuming device arranged in an onboard power supply system of a vehicle, the onboard power supply system also having a second, non-voltage-sensitive electric consuming device and a first voltage supply unit that provides a supply voltage, as well as a storage unit configured to store electric energy at least temporarily, a second voltage supply unit that provides a charging voltage, a switching unit that has connected thereto the first, voltage-sensitive electric consuming device, the storage unit, the first voltage supply unit and the second voltage supply unit, wherein a control unit for the onboard power supply system executes, the method comprising the acts of: determining whether a stabilization of the voltage applied to the first, voltage-sensitive electric consuming device is to be carried out; activating the switching unit as long as the stabilization is not to be carried out such that the first, voltage-sensitive electric consuming device is connected to the first voltage supply unit; activating the switching unit as soon as the stabilization is to be carried out such that the first, voltage-sensitive electric consuming device is connected to a series connection formed by the storage unit and the first voltage supply unit in order to thereby supply the first, voltage-sensitive electric consuming device with a voltage provided by the series connection in order to compensate for any reduction of the supply voltage that is present; and activating the second voltage supply unit, the second, non-voltage-sensitive electric consuming device and the switching unit subsequent to carrying out the stabilization, in each case, at least temporarily such that: the second voltage supply unit provides the charging voltage having a value greater than the supply voltage of the first voltage supply unit, an electric current flows through the second, non-voltage-sensitive electric consuming device at least temporarily, and charging of the storage unit is made possible via a current path formed by the second voltage supply unit and the second, non-voltage-sensitive electric consuming device. ### Claim 12 A computer product for implementing a method of stabilizing a voltage applied to a first, voltage-sensitive electric consuming device arranged in an onboard power supply system of a vehicle, the onboard power supply system also having a second, non-voltage-sensitive electric consuming device and a first voltage supply unit that provides a supply voltage, as well as a storage unit configured to store electric energy at least temporarily, a second voltage supply unit that provides a charging voltage, a switching unit that has connected thereto the first, voltage-sensitive electric consuming device, the storage unit, the first voltage supply unit and the second voltage supply unit, wherein a control unit controls the onboard power supply system, the computer product comprising: a non-transitory computer readable medium having stored thereon program code segments that: determine whether a stabilization of the voltage applied to the first, voltage-sensitive consuming device is to be carried out; activate the switching unit as long as the stabilization is not to be carried out such that the first, voltage-sensitive electric consuming device is connected to the first voltage supply unit; activate the switching unit as soon as the stabilization is to be carried out such that the first, voltage-sensitive electric consuming device is connected to a series connection formed by the storage unit and the first voltage supply unit in order to thereby supply the first, voltage-sensitive electric consuming device with a voltage provided by the series connection in order to compensate for any reduction of the supply voltage that is present; and activate the second voltage supply unit, the second, non-voltage-sensitive electric consuming device and the switching unit subsequent to carrying out the stabilization, in each case, at least temporarily such that: the second voltage supply unit provides the charging voltage having a value greater than the supply voltage of the first voltage supply unit, an electric current flows through the second, non-voltage-sensitive electric consuming device at least temporarily, and charging of the storage unit is made possible via a current path formed by the second voltage supply unit and the second, non-voltage-sensitive electric consuming device.