Battery management system and battery system

• US 9,840,157 B2
• Filed: 11/20/2013
• Issued: 12/12/2017
• Est. Priority Date: 12/11/2012
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH, Samsung SDI Company Limited
• Original Assignee: Robert Bosch GmbH, Samsung SDI Company Limited
• Inventors: Butzmann, Stefan
• Primary Examiner(s): Berhanu, Samuel
• Application Number:
  US14/649,302
• Publication Number:
  US 20150325886A1
• Time in Patent Office: 1,483 Days
• Field of Search: 320116
• CPC Class Codes: B60L 58/10 for monitoring or controlling batteries
• CPC Class Codes: G01R 19/16542 for batteries charge condition monitoring in G01R31/36
• CPC Class Codes: G01R 31/3835 involving only voltage measurements
• CPC Class Codes: G01R 31/392 Determining battery ageing or deterioration, e.g. state of health
• 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 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 10/482 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 2200/00 Safety devices for primary or secondary batteries
• CPC Class Codes: H01M 50/574 Devices or arrangements for the interruption of current
• CPC Class Codes: H02J 7/0031 using battery or load disconnect circuits H02J9/002 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

Abstract

A control circuit is configured to monitor and control the operation of a rechargeable battery. The rechargeable battery includes a plurality of interconnected battery cells which are connected to at least one pole connection of the battery by at least one circuit element such that the at least one pole can be electrically decoupled from the rechargeable battery. The control circuit further includes at least one cell monitoring device configured to detect operational parameters of at least one battery cell, and a first control device configured to determine battery properties by evaluating operational parameters. The first control device is connected to the at least one cell monitoring device by a first interface. The control circuit further includes a second control device configured to control the at least one circuit element and which is connected to the at least one cell monitoring device by a second interface.

Claims

1. A regulating circuit for monitoring and regulating the operation of a rechargeable battery having a plurality of interconnected battery cells and at least one pole connection connected to the battery cells by at least one switching element, such that the battery cells are electrically decoupleable from the at least one pole connection, the regulating circuit comprising:

a first cell monitoring device configured to record operating parameters of a first portion of the plurality of interconnected battery cells;

a second cell monitoring device configured to record operating parameters of a second portion of the plurality of interconnected battery cells;

a first control device connected to the first cell monitoring device and the second cell monitoring device via a first data bus, the first control device being configured to determine battery properties based on first operating parameters received from the first cell monitoring device and the second cell monitoring device via the first data bus;

a second control device connected to the first cell monitoring device and the second cell monitoring device via a second data bus, the second data bus being separate from the first data bus, the second control device being configured to;

receive second operating parameters from the first cell monitoring device and the second cell monitoring device via the second data bus; and

control the at least one switching element in response to identifying a fault in at least one battery cell in the plurality of interconnected battery cells based on the second operating parameters.

2. The regulating circuit as claimed in claim 1, at least one of the first cell monitoring device and the second cell monitoring device further comprising:

a cell voltage recording device configured to record a cell voltage of at least one battery cell as a measured voltage value.

3. The regulating circuit as claimed in claim 2, wherein the cell voltage recording device is configured to transmit recorded measured voltage values to the first control device via the first data bus.

4. The regulating circuit as claimed in claim 2, the cell voltage recording device being further configured to:

record the critical cell voltage parameters corresponding to exceeding of a maximum cell voltage limit value and/or undershooting of a minimum cell voltage limit value.

5. The regulating circuit as claimed in claim 4, wherein the cell voltage monitoring device is configured to transmit the critical cell voltage parameters to the second control device via the second data bus.

6. The regulating circuit as claimed in claim 1, wherein:

the second control device is connected to a current recording device;

the current recording device is configured to record a charging current and/or a discharging current of the rechargeable battery as a measured current value and to transmit recorded measured current values to the second control device; and

the second control device is configured to operate the at least one switching element in response to identifying a fault in at least one battery cell in the plurality of interconnected battery cells based on the recorded measurement current values.

7. The regulating circuit as claimed in claim 1, further comprising:

a third data bus configured to connect the first control device to the second control device,

wherein the first control device is configured to transmit data to the second control device via the third data bus, and

wherein the second control device is configured to transmit data to the first control device via the third data bus.

8. The regulating circuit of claim 1, the second control device being directly connected to the first cell monitoring device and the second cell monitoring device via the second data bus, the second control device being further configured to:

receive second operating parameters from the first cell monitoring device and the second cell monitoring device via the second data bus, the second operating parameters corresponding only to critical cell voltage parameters in the plurality of interconnected battery cells; and

control the at least one switching element in response to identifying a fault in at least one battery cell in the plurality of interconnected battery cells based on the second operating parameters.

9. A battery system comprising:

a rechargeable battery having a plurality of interconnected battery cells and at least one pole connection connected to the plurality of interconnected battery cells by at least one switching element, such that the battery cells are electrically decoupleable from the at least one pole connection; and

a regulating circuit configured to monitor and regulate operation of the rechargeable battery, the regulating circuit comprising;

a first cell monitoring device configured to record operating parameters of a first portion of the plurality of interconnected battery cells;

a second cell monitoring device configured to record operating parameters of a second portion of the plurality of interconnected battery cells;

a first control device connected to the first cell monitoring device and the second cell monitoring device via a first data bus, the first control device being configured to determine battery properties based on first operating parameters received from the first cell monitoring device and the second cell monitoring device via the first data bus;

a second control device connected to the first cell monitoring device and the second cell monitoring device via a second data bus, the second data bus being separate from the first data bus, the second control device being configured to;

receive second operating parameters from the first cell monitoring device and the second cell monitoring device via the second data bus; and

control the at least one switching element in response to identifying a fault in at least one battery cell in the plurality of interconnected battery cells based on the second operating parameters.

10. The battery system of claim 9, the second control device being directly connected to the first cell monitoring device and the second cell monitoring device via the second data bus, the second control device being further configured to:

receive second operating parameters from the first cell monitoring device and the second cell monitoring device via the second data bus, the second operating parameters corresponding only to critical cell voltage parameters in the plurality of interconnected battery cells; and

control the at least one switching element in response to identifying a fault in at least one battery cell in the plurality of interconnected battery cells based on the second operating parameters.