BATTERY MANAGEMENT SYSTEM

• US 20150340888A1
• Filed: 05/23/2014
• Published: 11/26/2015
• Est. Priority Date: 05/23/2014
• Status: Active Grant

• Current Assignee: Infineon Technologies AG
• Original Assignee: Infineon Technologies AG
• Inventors: Hofer, Guenter
• Granted Patent: US 10,305,293 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01K 13/00 Thermometers specially adapted for specific purposes
• CPC Class Codes: G01N 21/25 Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
• CPC Class Codes: G01N 7/00 Analysing materials by measuring the pressure or volume of a gas or vapour
• CPC Class Codes: G01R 31/382 Arrangements for monitoring battery or accumulator variables, e.g. SoC
• CPC Class Codes: G01R 31/389 Measuring internal impedance, internal conductance or related variables
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: 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
• CPC Class Codes: H01M 10/486 for measuring temperature
• CPC Class Codes: H01M 2010/4271 Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
• CPC Class Codes: H01M 2010/4278 Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A device comprises a control entity configured to monitor an operation parameter of at least one battery cell of a battery. The device further comprises an interface coupled with a power line of the battery and configured to transceive control data via at least one of load modulation or load demodulation of a power line signal of the power line.

Claims

1. A device, comprising:

a control entity configured to monitor an operation parameter of at least one battery cell of a battery,

an interface coupled with a power line of the battery and configured to transceive control data via at least one of load modulation or load demodulation of a power line signal of the power line.

2. The device of claim 1,

wherein the interface is configured to transmit the control data via time-dependent variation of an impedance connected in parallel to the at least one battery cell, the time-dependent variation encoding the control data.

3. The device of claim 2,

wherein the interface is configured to modulate a predefined carrier signal to encode the control data,

wherein the time-dependent variation of the impedance corresponds to the modulated predefined carrier signal.

4. The device of claim 3,

wherein the interface is configured to modulate the carrier signal employing amplitude modulation or phase shift modulation.

5. The device of claim 2,

wherein the interface comprises a transistor and a resistor, the resistor being coupled in series with the transistor,

wherein both the transistor and the resistor are situated in a branch of the power line connected in parallel to the at least one battery cell.

6. The device of claim 1,

wherein the control data is indicative of at least one element selected from the group consisting of:

an identification of the at least one battery cell;

an identification of the battery;

an identification of the device;

the operation parameter;

a control command for the control entity; and

a communication setup parameter.

7. The device of claim 1,

wherein the operation parameter comprises at least one parameter consisting of:

pressure of the at least one battery cell;

temperature of the at least one battery cell;

dilatation of the at least one battery cell;

color of an electrode of the at least one battery cell;

voltage across the at least one battery cell; and

voltage across the battery.

8. The device of claim 1,

wherein the interface is configured to set an amplitude of the load modulation based on the operation parameter.

9. A system, comprising:

a plurality of batteries electrically connected in series via a power line,

a plurality of devices, each one of the plurality of devices being associated with a respective one of the plurality of batteries, each device comprising;

a control entity configured to monitor an operation parameter of at least one battery cell of the associated battery,

an interface coupled with the power line and configured to transceive control data via at least one of load modulation or load demodulation of a power line signal of the power line.

10. The system of claim 9, further comprising:

a master unit configured to control the plurality of devices and comprising a interface, the interface of the master unit being configured to receive the control data transmitted by each one of the plurality of devices via load demodulation of the power line signal and further being configured to transmit the control data to each one of the plurality of devices via load modulation of the power line signal.

11. The system of claim 10,

wherein the interface of the master unit is AC coupled to the power line or to a given one of the plurality of devices.

12. The system of claim 9,

wherein the interfaces of at least two different devices are configured to transmit the control data via different modulation channels.

13. A system, comprising:

a plurality of battery cells of a battery, the battery cells being electrically connected in series via a power line,

a plurality of devices, each one of the plurality of devices being associated with a respective one of the plurality of battery cells, each device comprising;

a control entity configured to monitor an operation parameter of the associated battery cell,

an interface coupled with the power line and configured to transceive control data via at least one of load modulation or load demodulation of a power line signal of the power line.

14. The system of claim 13, further comprising:

a transponder unit comprising an interface coupled with the power line and configured to transceive the control data to and from each one of the plurality of devices via at least one of load modulation and load demodulation of the power line signal,

a master unit configured to control the plurality of devices and comprising an interface, the interface of the master unit being configured to transceive the control data to and from the interface of the transponder unit.

15. The system of claim 14,

wherein the interface of the transponder unit and the interface of the master nit communicate via at least one of load modulation or load demodulation.

16. The system of claim 14,

wherein the interfaces of at least two different devices are configured to transmit the control data via different modulation channels.

17. A method, comprising:

monitoring an operation parameter of at least one battery cell of a battery,

transmitting control data via at least one of load modulation or load demodulation of a power line signal of a power line of the battery.

18. The method of claim 17,

wherein the transmitting further comprising:

varying over time an impedance connected in parallel to the at least one battery cell, the time-dependent variation encoding the control data.

19. The method of claim 18, further comprising:

modulating a predefined carrier signal to encode the control data,

wherein the time-dependent variation of the impedance corresponds to the modulated predefined carrier signal.

20. The device of claim 19,

wherein said modulating employs amplitude modulation or phase shift modulation.