# US 2014/0152091 A1 · Energy supply circuit for electric components > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0152091 A1 - Document ID: US20140152091A1 - Status: Published application - Kind: A1 - Application number: 14/163,369 - Filed: 2014-01-24 - Published: 2014-06-05 - Earliest claimed: 2011-07-27 - Assignees: Marquardt GmbH - Applicants: Marquardt GmbH - Inventors: Karl MÜLLER; Matthias RECKERMANN - Web page: https://patentgrep.com/patent/US20140152091A1 ## CPC - B60R 16/033: characterised by the use of electrical cells or batteries (for propulsion puposes B60K1/04; supplying batteries to, or removing batteries from, vehicles B60S5/06; testing of charge state G01R31/36) - B60R 25/403: {Power supply in the vehicle} - G07C 9/00174: {Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys (mechanical locks with electric permutation E05B49/00; arrangements for sensing or reading record carriers G06K7/00; electronic switching H03K17/00)} - H01M 10/48: Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) - H02J 9/002: {in which a reserve is maintained in an energy source by disconnecting non-critical loads, e.g. maintaining a reserve of charge in a vehicle battery for starting an engine} - G01R 31/3647: {for determining the ability of a battery to perform a critical function, e.g. cranking} - G07C 2009/00634: {Power supply for the lock} - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - Y02E 60/10: Energy storage using batteries - Y02T 10/92: Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - G07C: TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract The invention relates to an energy supply circuit of electric components, in particular for a motor vehicle, having an accumulator, wherein a discharge monitoring circuit monitors the energy stored in the accumulator. If the energy stored in the accumulator falls below a threshold value, the discharge monitoring circuit switches off the energy supply at least of individual components, in particular of all components. ## Claims ### Claim 1 An energy supply circuit for electric components in a motor vehicle, comprising an accumulator, and a discharge monitoring circuit that monitors the energy stored in the accumulator, wherein the discharge monitoring circuit switches off the energy supply at least of individual electric components of the motor vehicle if the energy stored in the accumulator falls below a threshold value. ### Claim 2 (depends on 1) The energy supply circuit as claimed in claim 1, wherein residual energy contained in the accumulator is provided to an electric component of the motor vehicle upon request. ### Claim 3 (depends on 1) The energy supply circuit as claimed in claim 1, wherein the motor vehicle has a locking system that comprises a first device designed as a control device having at least two states, and an associated second device, wherein the first and second devices have transmitters and/or receivers for transmitting and/or receiving electromagnetic signals, wherein at least one of the signals transmitted between the second device and the first device is an encoded operating signal for authentication of the second device, so that a change of the state of the first device can be brought about after a positive evaluation of the transmitted operating signal if the second device is authorized, and wherein the first device is supplied with energy from the accumulator for normal operation, and wherein the electric component to which the residual energy is provided is a component of the locking system. ### Claim 4 (depends on 3) The energy supply circuit as claimed in claim 3 wherein the electric component of the first device that is supplied with the residual energy is a module for a driving authorization system and/or for an access authorization system of the motor vehicle. ### Claim 5 (depends on 3) The energy supply circuit as claimed in claim 3, wherein the second device is activated using the residual energy via an access authorization system module of the motor vehicle with the aid of a transponder for the access authorization system of the motor vehicle, and a coil of the transponder is placed in the door handle on the door or at another location in the exterior area of the motor vehicle. ### Claim 6 (depends on 1) The energy supply circuit as claimed in claim 1, wherein residual energy of the accumulator is connected via a separate activation unit for operating electronics of the motor vehicle, so that at least one starting procedure can be carried out for the motor vehicle. ### Claim 7 (depends on 3) The energy supply circuit as claimed in claim 3, wherein the second device is activated using the residual energy via a driving authorization system module of the motor vehicle with the aid of a transponder for the driving authorization system of the motor vehicle, and a coil of the transponder is placed in the dashboard or at another location in the interior area of the motor vehicle. ### Claim 8 (depends on 1) The energy supply circuit as claimed in claim 1, wherein the accumulator is a lithium-ion battery. ### Claim 9 (depends on 1) The energy supply circuit as claimed in claim 1, wherein the discharge monitoring circuit switches off the energy supply of all electric components of the motor vehicle if the energy stored in the accumulator falls below a threshold value. ### Claim 10 (depends on 3) The energy supply circuit as claimed in claim 3, wherein the locking system of the motor vehicle provides at least one of access and driving authorization of the motor vehicle. ### Claim 11 (depends on 3) The energy supply circuit as claimed in claim 3, wherein the first device is one of a control device for unlocking and/or locking the doors of the motor vehicle, the ignition lock of the motor vehicle, the steering wheel lock of the motor vehicle, for enabling and/or disabling the immobilizer of the motor vehicle, and the engine control unit. ### Claim 12 (depends on 3) The energy supply circuit as claimed in claim 3, wherein the second device is one of an electronic key, an ID transmitter, and a chip card. ### Claim 13 (depends on 3) The energy supply circuit as claimed in claim 3, wherein the electric component to which the residual energy from the accumulator is provided is a component of the first device. ### Claim 14 (depends on 4) The energy supply circuit as claimed in claim 4, wherein the electric component of the first device that is supplied with the residual energy from the accumulator is a module in the door of the motor vehicle for the door lock.