SYSTEM FOR MANAGING THE CHARGING OF A STORAGE BATTERY

• US 20150054470A1
• Filed: 03/26/2013
• Published: 02/26/2015
• Est. Priority Date: 03/30/2012
• Status: Active Grant

• Current Assignee: Renault Sas (Renault)
• Original Assignee: Renault Sas (Renault)
• Inventors: Le Vourch, Yves, Peuchant, Thomas, Saint-Marcoux, Antoine
• Granted Patent: US 9,941,721 B2
• Time in Patent Office: Days
• US Class Current: 320/162
• CPC Class Codes: G01R 19/16542 for batteries charge condition monitoring in G01R31/36
• CPC Class Codes: H02J 7/0014 Circuits for equalisation of charge between batteries
• CPC Class Codes: H02J 7/0016 using shunting, discharge or bypass circuits
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

The invention relates to a system for managing the charging of at least one cell of a storage battery, comprising: two separate means for comparing the voltage across the terminals of said cell with a threshold voltage; and two separate controlling means adapted to control two actuators, respectively, in order to interrupt the charging of the storage battery when said first or second comparing means detects that the voltage across the terminals of said cell exceeds the threshold voltage. One of the actuators is formed by a charger that is connected to said storage battery in order to recharge said cells.

Claims

1. A system for managing the charging of at least one cell of a storage battery, including:

a first means for comparing the voltage at the terminals of said cell with a threshold voltage, and

a first control means for controlling a first actuator in order to interrupt the charging of the storage battery when said first comparing means detects that the voltage at the terminals of said cell is greater than said threshold voltage,

a second means for comparing the voltage at the terminals of said cell with said threshold voltage, which means is separate from said first comparing means, and

a second control means, which is separate from said first control means and which is suitable for controlling a second actuator in order to interrupt the charging of the storage battery when said second comparing means detects that the voltage at the terminals of said cell is greater than said threshold voltage,

the system being characterized in that said first actuator is formed by a charger that is connected to said storage battery in order to recharge said cells.

2. The management system as claimed in claim 1, in which said second actuator includes at least one relay located between one of the terminals of the storage battery and one of the terminals of the charger connected to said storage battery in order to recharge said cells.

3. The management system as claimed in claim 2, in which said first and second control means are part of a first microprocessor and a second microprocessor having different architectures, respectively.

4. The management system as claimed in claim 1, in which said first and second comparing means include a first analog-digital interface and a second analog-digital interface having different architectures, respectively.

5. The management system as claimed in claim 1, in which said first analog-digital interface digitizes the voltage at the terminals of said cell and transmits it to a comparator which compares the digitized voltage with the threshold voltage.

6. The management system as claimed in claim 1, in which said comparator is part of the first microprocessor.

7. The management system as claimed in claim 1, in which said second analog-digital interface is suitable for carrying out an analog comparison of the voltage at the terminals of said cell and the threshold voltage and for transmitting a digitized signal dependent upon the result of said comparison.

8. The management system as claimed in claim 1, in which said first actuator is separate from said second actuator.

9. The management system as claimed in claim 1, in which said second actuator includes two relays located between the two terminals of the charger and the two terminals of the storage battery, respectively.