DISPLAY SYSTEM FOR ELECTRICALLY POWERED VEHICLE AND ELECTRICALLY POWERED VEHICLE HAVING THE SAME

• US 20130009764A1
• Filed: 09/13/2012
• Published: 01/10/2013
• Est. Priority Date: 10/14/2010
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: YAMAMOTO, Masaya, SETA, Itaru
• Granted Patent: US 9,758,050 B2
• Time in Patent Office: Days
• US Class Current: 340/449
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

An SOC display displayed on a display includes a first region and a second region. The first region presents an SOC range capable of ensuring the minimum traveling performance. The SOC display displays an SOC within the first region. The second region presents an SOC range incapable of ensuring the minimum traveling performance. The boundary between the first region and the second region corresponds to an SOC lower limit value indicating the SOC lower limit capable of ensuring the minimum traveling performance. The SOC lower limit value is set based on the temperature of a power storage device.

Claims

1. A display system for an electrically powered vehicle,

said electrically powered vehicle including:

a power storage device storing electric power for traveling; and

an electric motor receiving electric power from said power storage device and generating traveling driving force,

outputtable electric power of said power storage device varying depending on a state of said power storage device,

said display system comprising;

a state-of-charge calculating unit calculating a state of charge of said power storage device; and

a state-of-charge display displaying a remaining amount of said state of charge above a lower limit of said state of charge, said lower limit ensuring a predetermined minimum traveling performance.

2. The display system according to claim 1, further comprising a setting unit setting said lower limit based on a state of said power storage device.

3. The display system according to claim 2, wherein

said setting unit uses a map prepared in advance and showing a relation between temperature and said state of charge of said power storage device ensuring said minimum traveling performance to set said lower limit based on temperature of said power storage device.

4. The display system according to claim 2, wherein

said state-of-charge display displays said lower limit set by said setting unit.

5. The display system according to claim 4, wherein

said state-of-charge display displays a range of said state of charge below said lower limit in a manner different from a manner in which a range of said state of charge above said lower limit is displayed.

6. The display system according to claim 4, wherein

said state-of-charge display hides a range of said state of charge below said lower limit.

7. The display system according to claim 1, wherein

said state-of-charge display displays said state of charge with a bottom end of a display region for said state of charge being said lower limit.

8. The display system according to claim 7, wherein

said state-of-charge display displays said state of charge with a top end of the display region for said state of charge being an upper limit of said state of charge.

9. The display system according to claim 1, further comprising:

a distance calculating unit calculating a travelable distance based on said state of charge; and

a distance display displaying said travelable distance calculated by said distance calculating unit.

10. The display system according to claim 9, wherein

said distance calculating unit calculates, based on a remaining amount of said state of charge above said lower limit, said travelable distance for which said minimum traveling performance can be ensured.

11. An electrically powered vehicle comprising a display system according to claim 1.