System and method for managing battery of vehicle

Patent metadata

Field	Value
Publication number	US-11378626-B2
Application number	US-202017110983-A
Country	US
Kind code	B2
Filing date	Dec 3, 2020
Priority date	Jul 8, 2020
Publication date	Jul 5, 2022
Grant date	Jul 5, 2022

Abstract

A system for managing a battery of a vehicle includes a first controller configured to control a power-on (IG ON) state and a power-off (IG OFF) state of a plurality of controllers in the vehicle and to be periodically woken up in the power-off (IG OFF) state to wake up at least some of the plurality of controllers, and a second controller configured to turn off a main relay connecting a first battery in the vehicle and a vehicle system when the power-off (IG OFF) state begins, to monitor a state of the first battery storing energy for generating power of the vehicle by maintaining power during a preset first reference time, to be woken up at a wake-up period of the first controller when the first reference time elapses, and to monitor the state of the first battery.

First claim

What is claimed is:

1. A system for managing a battery of a vehicle, comprising:
a first controller configured to control a power-on (IG ON) state and a power-off (IG OFF) state of a plurality of controllers in the vehicle and to be periodically woken up in the power-off (IG OFF) state to wake up at least some of the plurality of controllers; and
a second controller configured to turn off a main relay connecting a first battery in the vehicle and a vehicle system when the power-off (IG OFF) state begins, to monitor a state of the first battery storing energy for generating power of the vehicle by maintaining power during a preset first reference time, to be woken up at a wake-up period of the first controller when the first reference time elapses, and to monitor the state of the first battery,
wherein, after turning off the main relay, the second controller does not monitor a state of the first battery when not allowed to check a state of charge (SoC) of a second battery for providing power voltage of the first controller and the second controller, when a SoC of the first battery is lower than a preset reference, or when not allowed to communicate with a low voltage DC-DC converter (LDC) or the first controller for dropping a voltage of the first battery and applying the voltage to the second battery.

2. The system of claim 1 , wherein the second controller sets the wake-up period of the first controller.

3. The system of claim 2 , wherein the second controller sets the wake-up period of the first controller to a first wake-up period during a preset second reference time from a time at which the power-off (IG OFF) state begins, and sets the wake-up period of the first controller to a second wake-up period, which is longer than the first wake-up period, after the second reference time elapses.

4. The system of claim 1 , wherein the second controller stops and initializes monitoring of the first battery, performed in the power-off (IG OFF) state, when a main relay connected to the first battery is turned on.

5. A method of managing a battery of a vehicle, the method comprising:
when receiving an external input for terminating vehicle driving, controlling a plurality of controllers in the vehicle in a power-off (IG OFF) state, by a first controller;
turning off a main relay connected to a first battery storing energy for generating driving power of the vehicle while maintaining power, by a second controller;
a first monitoring operation of setting a wake-up period of the first controller, and monitoring a state of the first battery of the vehicle by maintaining power during a preset first reference time, by the second controller;
a second monitoring operation of, when the first reference time elapses, being woken up at the wake-up period of the first controller, and monitoring the state of the first battery, by the second controller; and
after the turning off the main relay: determining not to perform the first monitoring operation by the second controller when not to allowed to check a state of charge (SoC) of a second battery for providing power voltage of the first controller and the second controller, when a SoC of the first battery is lower than a preset reference, or when not allowed to communicate with a low voltage DC-DC converter (LDC) or the first controller for dropping a voltage of the first battery and applying the voltage to the second battery.

6. The method of claim 5 , wherein:
the first monitoring operation comprises determining the wake-up period of the first controller to a preset first wake-up period, by the second controller; and
the second monitoring operation comprises being woken up by the first controller woken up at the first wake-up period during a preset second reference time at a time when the first reference time elapses, and setting the wake-up period of the first controller to a second wake-up period longer than the first wake-up period and being woken up by the first controller woken up at the second wake-up period after the second reference time elapses, by the second controller.

7. The method of claim 5 , wherein the first monitoring operation comprises:
checking whether the main relay is turned on when the second controller is controlled in a power-on (IG ON) state, by the first controller, and
terminating monitoring of the state of the first battery when the main delay is turned on, by the second controller.

8. The method of claim 5 , wherein the second monitoring operation comprises, after being woken up, determining a reason of wake-up and monitoring the state of the first battery when the determined reason is the wake-up period set by the first controller, by the second controller.

9. The method of claim 5 , wherein the second monitoring operation comprises, after being woken up, determining a reason of wake-up, checking whether the main relay is turned on when the determined reason is the external input rather than the wake-up period set by the first controller, and terminating monitoring of the state of the first battery when the main relay is turned on, by the second controller.

10. A method of managing a battery of a vehicle, the method comprising:
when receiving an external input for terminating vehicle driving, controlling a plurality of controllers in the vehicle in a power-off (IG OFF) state, by a first controller;
turning off a main relay connected to a first battery storing energy for generating driving power of the vehicle while maintaining power, by a second controller;
a first monitoring operation of setting a wake-up period of the first controller, and monitoring a state of the first battery of the vehicle by maintaining power during a preset first reference time, by the second controller; and
a second monitoring operation of, when the first reference time elapses, being woken up at the wake-up period of the first controller, and monitoring the state of the first battery, by the second controller,
wherein the second monitoring operation comprises, after being woken up, determining a reason of wake-up, checking whether the main relay is turned on when the determined reason is the external input rather than the wake-up period set by the first controller, and terminating monitoring of the state of the first battery when the main relay is turned on, by the second controller.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Baek Ki Seung
• Choi Ik Jun
• Hwang Do Sung
• Jung Kyung Taek
• Kim Chang Yu
• Cheong Dea Ki
• Kim Tae Hyuck
• Myoung Han Seung
• Lee Ho Joong
• Kim Hye Seung
• Ahn Byoung Jik
• Ko Kyu Beom
• Moon Hyo Sik
• Yoon Jong Seo
• Lee Sung Il
• Oh Hong Min
• Cho Jin Woo

Classifications

• H01M10/48

  Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) · CPC title

• H01M10/425 Primary

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2010/4271

  Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing · CPC title

• G01R31/382

  Arrangements for monitoring battery or accumulator variables, e.g. SoC · CPC title