# US 11,299,057 B2 · Method for charging an electrical energy store by means of voltage pulses

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- Number: US 11,299,057 B2
- Document ID: US11299057B2
- Status: Granted
- Kind: B2
- Application number: 16/755,725
- Filed: 2018-09-20
- Published: 2021-06-24
- Granted: 2022-04-12
- Earliest claimed: 2017-10-12
- Assignees: Robert Bosch GmbH
- Applicants: Robert Bosch GmbH
- Inventors: Andreas Lemke; Stefan Teusch; Thomas Lang; Maximilian Hinninger; Daniel Groezinger; Ulrich Schuetterle
- Web page: https://patentgrep.com/patent/US11299057B2

## CPC

- B60L 3/0046: {relating to electric energy storage systems, e.g. batteries or capacitors}
- B60L 53/22: Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
- B60L 53/62: in response to charging parameters, e.g. current, voltage or electrical charge
- B60L 58/12: responding to state of charge [SoC]
- H01M 10/44: Methods for charging or discharging (circuits for charging H02J7/00)
- H02J 7/50: acting upon multiple batteries simultaneously or sequentially
- H02J 7/90: Regulation of charging or discharging current or voltage
- H02J 7/927: {with introduction of pulses during the charging process}
- B60L 2210/10: DC to DC converters
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- H02J 2105/37: exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV]
- 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 10/72: Electric energy management in electromobility
- Y02T 90/12: Electric charging stations
- Y02T 90/14: Plug-in 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
- 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
- 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 a method for charging an electrical energy store, the electrical energy store comprising at least one electrical energy storage unit and a predefined maximum permissible energy-store voltage limit value being specified for the electrical energy store. The electrical energy store is charged with a pulsed charging voltage, a maximum value of the pulsed charging voltage being greater than the predefined maximum permissible energy-store voltage limit value over a pulse duration in the case of at least one pulse. The invention further relates to a corresponding device for charging the electrical energy store, to a corresponding computer program, to a corresponding machine-readable storage medium and to a corresponding electrical energy store.

## Claims

### Claim 1

A method for charging an electrical energy store (1) that includes at least one electrical energy storage unit (11, 12, 13), wherein a maximum permissible energy-store voltage limit value is specified for the electrical energy store (11, 12, 13), the method comprising:
a) charging the electrical energy store (1) with a pulsed electrical charging voltage, wherein for each of a plurality of pulses over a pulse duration a maximum value of the pulsed electrical charging voltage is greater than the maximum permissible energy-store voltage limit value, wherein the pulse duration is shorter than or equal to half a pulse period.

### Claim 2 (depends on 1)

The method as claimed in claim 1, further comprising:
b) driving an electronic circuit (18) in such a manner that an electrical charging voltage applied to the electronic circuit (18) is converted by the electronic circuit (18) into the pulsed electrical charging voltage.

### Claim 3 (depends on 1)

The method as claimed in claim 1, further comprising:
c) determining a charge state variable of the electrical energy store (1);
d) comparing the determined charge state variable with a predefined charge state variable threshold value;
e) if the charge state variable exceeds or reaches the predefined charge state variable threshold value, interrupting the charging of the electrical energy store (1).

### Claim 4 (depends on 1)

The method as claimed in claim 1, wherein the pulse duration is less than 50 milliseconds.

### Claim 5 (depends on 1)

The method as claimed claim 1, wherein a mean value of the pulsed electrical charging voltage over the pulse duration is greater than the maximum permissible energy-store voltage limit value.

### Claim 6 (depends on 1)

The method as claimed in claim 1, wherein the pulsed electrical charging voltage over the pulse duration is greater than the maximum permissible energy-store voltage limit value.

### Claim 7

A device for charging an electrical energy store (1), wherein the electrical energy store comprises at least one electrical energy storage unit (11, 12, 13), and a maximum permissible energy-store voltage limit value is specified for the electrical energy store (1), and wherein the device comprises an electronic circuit (18) for connecting to the electrical energy store (1) and an electronic control unit (16), wherein the electronic control unit (16) is configured to control charging of the electrical energy store (1) with a pulsed electrical charging voltage, wherein for each of a plurality of pulses over a pulse duration a maximum value of the pulsed electrical charging voltage is greater than the maximum permissible energy-store voltage limit value, wherein the pulse duration is shorter than or equal to half a pulse period.

### Claim 8 (depends on 7)

The device as claimed in claim 7, wherein the electronic circuit comprises two power semiconductor switches (14, 15) which are connected in series in opposite directions.

### Claim 9

A non-transitory, computer-readable storage medium containing instructions that when executed by a computer cause the computer to
control charging of an electrical energy store (1) that includes at least one electrical energy storage unit (11, 12, 13), wherein a maximum permissible energy-store voltage limit value is specified for the electrical energy store (11, 12, 13), by charging the electrical energy store (1) with a pulsed electrical charging voltage, wherein for each of a plurality of pulses over a pulse duration a maximum value of the pulsed electrical charging voltage is greater than the maximum permissible energy-store voltage limit value, wherein the pulse duration is shorter than or equal to half a pulse period.

### Claim 10

An electrical energy store (1), comprising:
at least one electrical energy storage unit (11, 12, 13); and
a device having an electronic circuit (18) for connecting to the electrical energy store (1) and an electronic control unit (16), wherein the electronic control unit (16) is configured to control charging of the electrical energy store (1) with a pulsed electrical charging voltage, wherein for each of a plurality of pulses over a pulse duration a maximum value of the pulsed electrical charging voltage is greater than a maximum permissible energy-store voltage limit value specified for the electrical energy store (11, 12, 13), wherein the pulse duration is shorter than or equal to half a pulse period.