Battery Management Unit Having a Plurality of Monitoring IC Chips

• US 20140377602A1
• Filed: 10/04/2012
• Published: 12/25/2014
• Est. Priority Date: 11/04/2011
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH, Samsung SDI Company Limited
• Original Assignee: Robert Bosch GmbH, Samsung SDI Company Limited
• Inventors: Thoelmann, Karsten
• Granted Patent: US 9,733,310 B2
• Time in Patent Office: Days
• US Class Current: 429/61
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 58/18 of two or more battery modules
• CPC Class Codes: B60L 58/21 having the same nominal voltage
• CPC Class Codes: G01R 31/382 Arrangements for monitoring battery or accumulator variables, e.g. SoC
• CPC Class Codes: G01R 31/396 Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
• CPC Class Codes: H01M 10/4207 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/4257 Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
• CPC Class Codes: H01M 10/482 for several batteries or cells simultaneously or sequentially
• 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 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H02J 13/00002 characterised by monitoring
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H04Q 2209/10 using a centralized architecture
• CPC Class Codes: H04Q 2209/30 using a wired architecture
• 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
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles

Abstract

A battery management unit includes a plurality of monitoring IC chips each configured to detect at least one operating parameter of at least one battery cell or battery module, which has a predetermined number of battery cells and is connected to a first bus. The battery management unit further includes a control unit and a basis monitoring IC chip which is likewise connected to the first bus and is configured to communicate with each of the monitoring IC chips via the first bus. The basis monitoring IC chip and the control unit are connected to a second bus and are configured to communicate with each other via the second bus. The basis monitoring IC chip and the control unit are arranged on a common circuit board.

Claims

1. A battery management unit comprising:

a plurality of monitoring IC chips, each of the monitoring IC chips being configured to record at least one operating variable of at least one battery cell or a battery module including a predetermined number of battery cells and each of the monitoring IC chips being connected to a first bus;

a base monitoring IC chip which is likewise connected to the first bus and is configured to communicate with each of the monitoring IC chips via the first bus; and

a control device, the base monitoring IC chip and the control device being connected to a second bus and being configured to communicate with one another via the second bus, and the base monitoring IC chip and the control device being located on a common printed circuit board.

2. The battery management unit as claimed in claim 1, wherein the base monitoring IC chip is configured to communicate via the first bus using a first bus protocol and via the second bus using a second bus protocol.

3. The battery management unit as claimed in claim 1, wherein the second bus is located on the printed circuit board in such a manner that the second bus is protected from electromagnetic irradiation and emission.

4. The battery management unit as claimed in claim 1, wherein the base monitoring IC chip is not configured to record an operating variable of the at least one battery cell or the battery module.

5. The battery management unit as claimed in claim 1, wherein at least some of the monitoring IC chips are connected to the first bus in a daisy chain topology.

6. the battery management unit as claimed in claim 1, further comprising:

a DC isolation unit configured to DC-isolate the base monitoring IC chip and the control device from one another and located on the printed circuit board.

7. The battery management unit as claimed in claim 1, wherein each of the monitoring IC chips is configured to record a voltage of the at least one battery cell or the battery module.

8. The battery management unit as claimed in claim 1, wherein the base monitoring IC chip on the first bus is configured as a master, and each of the monitoring IC chips on the first bus are configured as a slave.

9. The battery management unit as claimed in claim 1, further comprising a voltage supply unit configured to provide a supply voltage for the base monitoring IC chips and located on the printed circuit board.

10. The battery management unit as claimed in claim 1, wherein:

the base monitoring IC chip is configured to record at least one further operating variable of a battery including the at least one battery cells, and

the at least one further operating variable includes a battery current or a total battery voltage.

11. A battery comprising:

a plurality of battery cells; and

a battery management unit including

a plurality of monitoring IC chips, each of the monitoring IC chips being configured to record at least one operating variable of at least one battery cell of the plurality of battery cells and each of the monitoring IC chips being connected to a first bus,

a base monitoring IC chip which is likewise connected to the first bus and is configured to communicate with each of the monitoring IC chips via the first bus, and

a control device, the base monitoring IC chip and the control device being connected to a second bus and being configured to communicate with one another via the second bus, and the base monitoring IC chip and the control device being located on a common printed circuit board.

12. An electric motor vehicle, comprising:

a battery including a plurality of battery cells and a battery management unit having (i) a plurality of monitoring IC chips, each of the monitoring IC chips being configured to record at least one operating variable of at least one battery cell of the plurality of battery cells and each of the monitoring IC chips being connected to a first bus, (ii) a base monitoring IC chip which is likewise connected to the first bus and is configured to communicate with each of the monitoring IC chips via the first bus, and (iii) a control device, the base monitoring IC chip and the control device being connected to a second bus and being configured to communicate with one another via the second bus, and the base monitoring IC chip and the control device being located on a common printed circuit board.