Method of estimating state of charge for battery and battery management system using the same
First Claim
1. A battery management system, comprising:
- a sensor for detecting a pack current and a pack voltage of a battery;
a state of health measurer coupled to the sensor to receive the pack current and the pack voltage, and measuring a state of health of the battery from both of the pack current and the pack voltage;
a state of charge measurer coupled to the sensor to receive the pack current;
a total amount of charge determiner coupled to the state of charge measurer, determining a total amount of charge, and delivering the information of the total amount of charge to the state of charge measurer, the state of charge measurer measuring a state of charge from both of the pack current and the total amount of charge of the battery; and
an output unit coupled to both of the state of health measurer and the state of charge measurer, and receiving the state of health and the state of charge.
1 Assignment
0 Petitions
Accused Products
Abstract
The battery management system (BMS) measures a state of charge (SOC) of a battery by using a total amount of charge corresponding to a total amount of discharge accumulation. The BMS, outputting a SOC of a battery to an engine control unit (ECU), includes a sensor, state of health (SOH) and SOC measurers, a total amount of charge (TAC) determiner, and an output unit. The sensor detects a pack current and a pack voltage of the battery. The SOH measurer outputs a SOH of the battery by using the pack current and voltage. The SOC measurer measures a SOC of the battery by using the pack current and a TAC of the battery. The TAC determiner accumulates a total amount of discharge accumulation by using the pack current, determines a TAC corresponding to the total amount of discharge accumulation, and delivers the determined TAC to the SOC measurer. The output unit outputs the SOC and SOH to the ECU.
92 Citations
16 Claims
-
1. A battery management system, comprising:
-
a sensor for detecting a pack current and a pack voltage of a battery;
a state of health measurer coupled to the sensor to receive the pack current and the pack voltage, and measuring a state of health of the battery from both of the pack current and the pack voltage;
a state of charge measurer coupled to the sensor to receive the pack current;
a total amount of charge determiner coupled to the state of charge measurer, determining a total amount of charge, and delivering the information of the total amount of charge to the state of charge measurer, the state of charge measurer measuring a state of charge from both of the pack current and the total amount of charge of the battery; and
an output unit coupled to both of the state of health measurer and the state of charge measurer, and receiving the state of health and the state of charge. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method for measuring a state of charge of a battery employed to a battery management system, the method comprising:
-
measuring a pack voltage and a pack current of the battery;
obtaining a total amount of discharge accumulation of the battery from the measured pack current;
determining a total amount of charge from the obtained total amount of discharge accumulation;
measuring a state of charge of the battery from both of the total amount of charge and the pack current. - View Dependent Claims (9, 10, 11)
-
-
12. A recording medium used in a battery management system for measuring a state of charge of a battery, the recording medium comprising:
-
a measurement function for measuring a pack voltage and a pack current of the battery;
a calculation function for calculating a total amount of discharge accumulation from the measured pack current;
a determination function for determining a total amount of charge of the battery from the total amount of discharge accumulation; and
a calculation function for calculating a state of charge of the battery from both of the total amount of charge and the pack current. - View Dependent Claims (13, 14, 15, 16)
-
Specification