# US 10,312,698 B2 · Charger device for battery supported power supplies

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- Number: US 10,312,698 B2
- Document ID: US10312698B2
- Status: Granted
- Kind: B2
- Application number: 15/897,327
- Filed: 2018-02-15
- Published: 2018-07-05
- Granted: 2019-06-04
- Earliest claimed: 2015-02-23
- Assignees: Koninklijke Philips N.V.
- Applicants: Koninklijke Philips N.V.
- Inventors: Bernhard Wagner
- Web page: https://patentgrep.com/patent/US10312698B2

## CPC

- H02J 7/56: Active balancing, e.g. using capacitor-based, inductor-based or DC-DC converters
- H02J 7/80: including monitoring or indicating arrangements
- H02J 7/50: acting upon multiple batteries simultaneously or sequentially
- H02J 7/54: Passive balancing, e.g. using resistors or parallel MOSFETs
- H02J 7/575: {Parallel/serial switching of connection of batteries to charge or load circuit}
- Y02E 60/10: Energy storage using batteries
- 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

## Abstract

A charger device comprises a sensor which is configured to measure a differential current as a difference between a first current through a first battery portion of a battery and a second current through a second battery portion of the battery. The sensor is configured to provide a current difference signal based on the measured differential current. The charger device further comprises a compensator configured to calculate a first current setpoint used for the first battery portion and a second current setpoint used for the second battery portion based on the current difference signal and a battery current setpoint. The charger device also comprises a controller configured to control charging and/or discharging of the first battery portion based on the first current setpoint and of the second battery portion based on the second current setpoint.

## Claims

### Claim 1

A power supply system, comprising:
a battery comprising a first battery portion and a second battery portion; and
a charger device comprising a sensor configured to measure a differential current as a difference between a first current through the first battery portion and a second current through the second battery portion and to provide a current difference signal based on the measured differential current, wherein the first battery portion and the second battery portion are centrally earthed; the charger device further comprising a compensator configured to calculate a first current setpoint used for the first battery portion and a second current setpoint used for the second battery portion based on the current difference signal and a battery current setpoint; the charger device further comprising a controller configured to control charging and/or discharging of the first battery portion based on the first current setpoint and of the second battery portion based on the second current setpoint, wherein the controller comprises a first portion charging device configured to control charging and/or discharging of the first battery portion based on the first current setpoint, and a second portion charging device configured to control charging and/or discharging of the second battery portion based on the second current setpoint;
wherein the charger device is configured to control charging and/or discharging of the battery.

### Claim 2

A method for controlling charging and discharging of a battery, comprising:
measuring a differential current as a difference between a first current through a first battery portion of the battery and a second current through a second battery portion of the battery;
providing a current difference signal based on the differential current, wherein the first battery portion and the second battery portion are centrally earthed;
calculating a first current setpoint used for the first battery portion and a second current setpoint used for the second battery portion based on the current difference signal and a battery current setpoint;
controlling charging and/or discharging of the first battery portion based on the first current setpoint; and
controlling charging and/or discharging of the second battery portion based on the second current setpoint.

### Claim 3 (depends on 2)

The method according to claim 2, wherein calculating the first current setpoint and/or the second current setpoint is performed by a calculation selected from a proportional calculation, a proportional-integral calculation, a proportional-derivative calculation, and a proportional-integral-derivative calculation.

### Claim 4 (depends on 2)

The method according to claim 2, wherein calculating the first current setpoint and/or the second current setpoint is performed by integrating the current difference signal.

### Claim 5 (depends on 2)

The method according to claim 2, wherein calculating the first current setpoint and/or the second current setpoint is performed by a minimization control loop of the current difference signal.