APPARATUS AND METHOD FOR CONTROLLING CHARGING OF BATTERY FOR HYBRID VEHICLE

• US 20180118049A1
• Filed: 12/13/2016
• Published: 05/03/2018
• Est. Priority Date: 11/01/2016
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: KO, Kyu Beom
• Granted Patent: US 10,343,544 B2
• Time in Patent Office: Days
• CPC Class Codes: B60L 53/00 Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60L 58/16 responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
• CPC Class Codes: G01R 31/367 Software therefor, e.g. for battery testing using modelling or look-up tables
• CPC Class Codes: G01R 31/44 Testing lamps
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/1492 by means of controlling devices between the generator output and the battery
• CPC Class Codes: Y02T 10/92 Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

Abstract

A method of controlling charging of a battery connected to a wheel driving motor for a hybrid vehicle is disclosed. The method comprises detecting battery charging information when a battery is charged; learning a state of health (SOH) of the battery by using the battery charging information; calculating a battery charging current by using the learned SOH; and controlling charging of the battery using the battery charging current.

Claims

1. A method of controlling charging of a battery for a hybrid vehicle by a battery charging control apparatus for a hybrid vehicle, the method comprising:

detecting battery charging information when a battery is charged;

learning a state of health (SOH) of the battery by using the battery charging information;

calculating a battery charging output by using the learned SOH; and

controlling the battery to be charged by using the battery charging output.

2. The method of claim 1, wherein:

the detecting of the charging information includes;

detecting a variation of a state of charge (SOC) before and after the charging when the battery is charged; and

measuring a battery charging variation by the charging of the battery.

3. The method of claim 2, wherein:

the learning of the SOH includes;

estimating maximum battery energy by using the variation of the SOC and the battery charging variation; and

estimating the SOH by the charging of the battery by using the maximum battery energy.

4. The method of claim 1, wherein:

the learning of the SOH includes

estimating an SOH whenever the battery is charged, and calculating a final SOH by applying a weighted value to the SOH estimated during the recent charging.

5. The method of claim 4, wherein:

the calculating of the battery charging output includes

calculating a battery charging capacity chargeable in the battery in a current state by multiplying the final SOH and an initial capacity of the battery.

6. The method of claim 5, wherein:

the calculating of the battery charging output includes

calculating a charging time by using the initial capacity of the battery and an initial charging output, and calculating the battery charging output by dividing the battery charging capacity by the charging time.

7. The method of claim 1, wherein:

the controlling the battery to be charged includes

charging the battery by using a charging current value corresponding to the battery charging output.

8. An apparatus for controlling charging of a battery for a hybrid vehicle, the apparatus comprising:

a charging information detecting unit configured to detect battery charging information when a battery is charged;

a learning unit configured to learn a state of health (SOH) of the battery by using the battery charging information; and

a charging controller configured to calculate a battery charging output by using the learned SOH and control the battery to be charged by using the battery charging output.

9. The apparatus of claim 8, wherein:

the charging information includes

a variation of a state of charge (SOC) before and after the charging of the battery, and a battery charging quantity by the charging of the battery.

10. The apparatus of claim 9, wherein:

the learning unit includes

an SOH estimating unit configured to estimate an SOH by using the variation of the SOC and the battery charging quantity whenever the battery is charged.

11. The apparatus of claim 10, wherein:

the learning unit further includes

a final SOH calculating unit configured to calculate a final SOH by applying a weighted value to the SOH estimated during the recent charging.

12. The apparatus of claim 11, wherein:

the charging controller includes;

a charging output calculating unit configured to calculate the battery charging output by using the final SOH; and

a charging current calculating unit configured to calculate a charging current value corresponding to the battery charging output.

13. The apparatus of claim 12, wherein:

the charging output calculating unit

calculates a battery charging capacity by multiplying the final SOH and the initial capacity of the battery, calculates a charging time by using the initial capacity of the battery and an initial charging output, and calculates the battery charging output by dividing the battery charging capacity by the charging time.