# US 11,114,866 B2 · Energy system for a motor vehicle and method for charging an electrical energy storage device

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- Number: US 11,114,866 B2
- Document ID: US11114866B2
- Status: Granted
- Kind: B2
- Application number: 16/376,344
- Filed: 2019-04-05
- Published: 2019-11-07
- Granted: 2021-09-07
- Earliest claimed: 2018-05-07
- Assignees: Audi AG
- Applicants: Audi AG
- Inventors: Roman Straßer
- Web page: https://patentgrep.com/patent/US11114866B2

## CPC

- B60L 53/14: Conductive energy transfer
- H02J 7/575: {Parallel/serial switching of connection of batteries to charge or load circuit}
- B60L 53/11: {DC charging controlled by the charging station, e.g. mode 4}
- B60L 53/16: Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
- B60L 53/305: {Communication interfaces}
- B60L 58/19: Switching between serial connection and parallel connection of battery modules
- H01M 10/441: {for several batteries or cells simultaneously or sequentially}
- Y02E 60/10: Energy storage using batteries
- 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 90/12: Electric charging stations
- Y02T 90/14: Plug-in electric vehicles
- Y02T 90/16: Information or communication technologies improving the operation of electric vehicles
- 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
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

An energy system for a motor vehicle and a method for charging at least one electrical energy storage device of the energy system.

## Claims

### Claim 1

A method for charging at least one electrical energy storage device of a motor vehicle, comprising:
electrically subdividing a plurality of electrical cells of the energy storage device into at least two equivalent energy storage sub-devices with the same number of electrical cells for the duration of the charging process and they are connected in series, wherein the at least one energy storage device is sub-divided into the energy storage sub-devices as a function of a charging voltage available for the charging process, wherein the total of the nominal voltages of the energy storage sub-devices is less than or equal to the charging voltage.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the at least one electrical energy storage device is sub-divided into n equivalent energy storage sub-devices, wherein n is an integer greater than 2.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the at least one electrical energy storage device comprises at least one traction battery of an electric vehicle or of a hybrid vehicle.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the at least one electrical energy storage device comprises a number of cells or cell modules, which can be or are sub-divided into at least two energy storage sub-devices, each comprising at least one electrical cell or a cell module, and wherein the energy storage sub-devices may optionally be connected in parallel or in series.

### Claim 5 (depends on 2)

The method according to claim 2, wherein the at least one electrical energy storage device comprises at least one traction battery of an electric vehicle or of a hybrid vehicle.

### Claim 6 (depends on 2)

The method according to claim 2, wherein the at least one electrical energy storage device comprises a number of cells or cell modules, which can be or are sub-divided into at least two energy storage sub-devices, each comprising at least one electrical cell or a cell module, and wherein the energy storage sub-devices may optionally be connected in parallel or in series.

### Claim 7 (depends on 3)

The method according to claim 3, wherein the at least one electrical energy storage device comprises a number of cells or cell modules, which can be or are sub-divided into at least two energy storage sub-devices, each comprising at least one electrical cell or a cell module, and wherein the energy storage sub-devices may optionally be connected in parallel or in series.