Battery management system, battery, motor vehicle having a battery management system, and method for monitoring a battery

Patent metadata

Field	Value
Publication number	US-10024921-B2
Application number	US-201214131637-A
Country	US
Kind code	B2
Filing date	Jul 6, 2012
Priority date	Jul 14, 2011
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

A battery management system includes several first measuring units, each associated with at least one respective battery module of the battery to detect a measured variable. The battery management system also includes a control device having a first microcontroller and a second microcontroller, a first communication connection configured to transfer data between the first measuring units and the control device, and several second measuring units configured to detect the measured variable from the battery modules of the battery in addition to the detection of the measured variable by the first measuring units. A second communication connection is used to transfer data between the second measuring units and the control device. The first microcontroller is configured to evaluate measurement data detected by the first measuring units, and the second microcontroller is configured to evaluate measurement data detected by the second measuring units independently of the first microcontroller.

First claim

The invention claimed is:

1. A battery management system, comprising:
a plurality of first measuring units configured to capture a measured variable associated with at least one battery module of a battery;
a controller having a high voltage side and a low voltage side and including a first microcontroller and a second microcontroller, the first microcontroller being arranged on the high voltage side, the second microcontroller being arranged on the low voltage side, the high voltage side and the low voltage side being DC isolated from each other;
a first communication link configured to transmit the measured variable from the first measuring units to the first microcontroller;
a plurality of second measuring units configured to capture the measured variable from the at least one battery module of the battery; and
a second communication link configured to transmit the measured variable from the second measuring units to the second microcontroller, wherein the first microcontroller is programmed to evaluate the measured variable captured by the first measuring units,
wherein the second microcontroller is programmed to evaluate the measured variable captured by the second measuring units independently of the evaluation of the measured variable by the first microcontroller.

2. The battery management system as claimed in claim 1 , wherein the first microcontroller is programmed to evaluate the measurement data captured by the first measuring units independently of the second microcontroller.

3. The battery management system as claimed in claim 1 , wherein:
the first communication link is a CAN bus or the first measuring units are coupled by the first communication link in accordance with a daisy chain arrangement, and/or
the second communication link is a CAN bus or the second measuring units are coupled by the second communication link in accordance with a daisy chain arrangement.

4. The battery management system as claimed in claim 1 , wherein at least one of the first measuring units and the second measuring units are each connected to at least one of the first and the second communication link via a cell monitoring microcontroller.

5. The battery management system as claimed in claim 1 , wherein:
a respective one of the first measuring units is arranged in a first cell monitoring unit and one of the second measuring units is arranged in a second cell monitoring unit, and
the second cell monitoring unit is coordinate with respect to the first cell monitoring unit, such that the first and second cell monitoring units are each coupled to the same battery modules of the battery.

6. The battery management system as claimed in claim 1 , wherein:
a respective one of the first measuring units together with one of the second measuring units are arranged in a cell monitoring unit, and
the cell monitoring unit is configured to capture at least one further physical measured variable for the battery cells or battery modules in addition to the measured variables monitored by the first and second measuring units.

7. The battery management system as claimed in claim 1 , wherein the battery management system is included in a battery.

8. The battery management system as claimed in claim 1 , wherein the at least one measured variable is an electrical voltage.

9. The battery management system as claimed in claim 1 , wherein:
the first measuring units of the plurality of first measuring units are configured to ascertain the at least one measured variable repeatedly and independently of the second measuring units of the plurality of second measuring units, and
the second measuring units of the plurality of second measuring units are configured to ascertain the at least one measured variable repeatedly and independently of the first measuring units of the plurality of first measuring units.

10. The battery management system as claimed in claim 1 , wherein:
the first communication link is configured to transmit the at least one measured variable to the first microcontroller for the purpose of evaluation or processing, the first communication link exclusively associated with the plurality of first measuring units, and the first microcontroller exclusively associated with the plurality of first measuring units,
the second communication link is configured to transmit the at least one measured variable to the second microcontroller for the purpose of evaluation or processing, the second communication link exclusively associated with the plurality of second measuring units, and the second microcontroller exclusively associated with the plurality of second measuring units,
the first microcontroller evaluates or processes the at least one measured variable independently of the evaluation or processing of the at least one measured variable by the second microcontroller, and
the second microcontroller evaluates or processes the at least one measured variable independently of the evaluation or processing of the at least one measured variable by the first microcontroller.

11. The battery management system as claimed in claim 1 , wherein the at least one measured variable is an electrical voltage.

12. A motor vehicle, comprising:
a drive system;
a battery connected to the drive system; and
a battery management system configured to monitor the battery, the battery management system including:
a plurality of first measuring units, each associated with at least one battery module of the battery, the first measuring units configured to capture at least one measured variable;
a controller including a first microcontroller and a second microcontroller;
a first communication link configured to transmit data between the first measuring units and the controller;
a plurality of second measuring units configured to capture the at least one measured variable from the battery modules of the battery and the at least one measured variable by the first measuring units; and
a second communication link configured to transmit data between the second measuring units and the controller,

wherein the first microcontroller is programmed to evaluate measurement data captured by the first measuring units, and the second microcontroller is programmed to evaluate measurement data captured by the second measuring units independently of the first microcontroller,
wherein the first microcontroller is arranged on a low voltage side of the controller and the second microcontroller is arranged on a high voltage side of the controller, and said sides are DC isolated from one another,
wherein the first measuring units cover the first microcontroller on the low-voltage side using a first line and the second measuring units cover the second microcontroller on the high voltage side using a second line.

13. The motor vehicle as claimed in claim 12 , wherein the at least one measured variable is an electrical voltage.

Assignees

• Butzmann Stefan
• Bosch Gmbh Robert
• Samsung Sdi Co Ltd

Inventors

• Butzmann Stefan

Classifications

• H01M10/48

  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 title

• Y02T90/16

  Information or communication technologies improving the operation of electric vehicles · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M2010/4271

  Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing · CPC title

• B60L2240/547

  Voltage · CPC title