ACCUMULATOR COMPRISING A PLURALITY OF GALVANIC CELLS

• US 20100112417A1
• Filed: 10/23/2009
• Published: 05/06/2010
• Est. Priority Date: 10/24/2008
• Status: Active Grant

• Current Assignee: Li-Tec Battery GmbH (Mercedes-Benz Group AG)
• Original Assignee: Li-Tec Battery GmbH (Mercedes-Benz Group AG)
• Inventors: Schäfer, Tim, Gutsch, Andreas
• Granted Patent: US 8,603,655 B2
• Time in Patent Office: Days
• US Class Current: 429/50
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/4207 for several batteries or cells simultaneously or sequentially
• 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 10/441 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/443 in response to temperature
• CPC Class Codes: H01M 10/482 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/63 Control systems charging or discharging in response to temperature H01M10/44 , H01M10/443; measurement of temperature H01M10/48 , H01M10/486
• 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 7/0016 using shunting, discharge or bypass circuits
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• 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

In accordance with the invention, an accumulator comprises at least two galvanic cells that are electrically connected. The accumulator furthermore comprises a control device and at least one measuring device. The measuring device is suitable to determine at least one reading for at least one first functional parameter of a galvanic cell. The accumulator comprises a memory device which is assigned to the control device. The memory device is suitable for storing at least one target value of a first functional parameter. The accumulator furthermore comprises a computing unit. The computing unit is suitable for assigning at least two measured values and one pertinent target value to a first computed result. The measured values are the measured first functional parameters, respectively of at least two galvanic cells of the accumulator. The target value is a predetermined value in respect to the first functional parameter. The control device is suitable for initiating a predetermined action as a function of the first computed result.

Claims

1. Accumulator (1) comprising:

at least two galvanic cells (2), wherein at least two galvanic cells (2) are electrically interconnected,

a control device (3),

at least one measuring device (4, 4a, 4b), which is provided for determining a reading assigned to at least one first functional parameter of a galvanic cell (2),

wherein the

accumulator (1) further comprises a memory device (6), which is assigned to control device (3) and is provided to store at least one target value of a first functional parameter, and wherein the

accumulator (1) further comprises a computing unit (5), which is provided to associate at least one first reading of one first galvanic cell (2), a reading of a further galvanic cell (2) and a target value leading to at least one first computed result,

and further wherein the control device (3) is provided to initiate a predetermined action as a function of the first computed result.

2. Accumulator (1) according to claim 1, wherein the memory device (6) is further provided to store a reading of a functional parameter and/or a quantity derived thereof, together with at least one first value that is representative for the point in time of the reading and/or together with at least one second value, which is representative for the galvanic cell pertaining to the reading.

3. Accumulator (1) according to claim 1, wherein the control device (3) is provided, for at least parts of a time interval:

to initiate the at least one measuring device (4, 4a, 4b),

to initiate the computing unit (5),

and/or to communicate a target value of a first functional parameter to the computing unit (5).

4. Accumulator (1) according claim 1, wherein the control unit (3) is further provided to control the charging or the discharging, respectively, of a galvanic cell (2) according to at least one predetermined instruction in regard to charging.

5. Accumulator (1) according to claim 1, wherein the control device (3) is further provided to control the charging or the discharging, respectively, of at least two galvanic cells (2) in accordance with different predetermined instructions in regard to charging.

6. Accumulator (1) according to claim 5, wherein the predetermined instruction in regard to charging comprises at least one loading pulse.

7. Accumulator (1) according to claim 1, wherein the control unit (3) is further provided to overwrite a predetermined instruction in regard to charging.

8. Accumulator (1) according to claim 1, wherein the control device (3) is provided to exchange a predetermined message with an independent control for at least parts of a time interval.

9. A process for operating an accumulator (1) according to claim 1, wherein the at least one measuring device (4, 4a, 4b) measures a first functional parameter of at least two galvanic cells during at least parts of a time interval,

computing unit (5) associates the readings of the first functional parameter for at least two galvanic cells (2) with a target value of the first functional parameter leading to a first computed result,

computing unit (5) transmits the first computed result to the control device (3).

10. The process according to claim 9 for operating an accumulator (1) wherein the control device (3) initiates a predetermined action while using a first computed result.

11. Process according to claim 9, for operating an accumulator (1) wherein at least one event relating to the charging and/or discharging processes of at least two galvanic cells (2) is stored in memory device (6).

12. Process according claim 9 for operating an accumulator (1) wherein the control device (3) uses different instructions in regard to charging for each of the at least two galvanic cells while using a first computed result.