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JP-2026075493-A - Electric vehicles

JP2026075493AJP 2026075493 AJP2026075493 AJP 2026075493AJP-2026075493-A

Abstract

[Problem] To provide a technology that prevents electric vehicles from stopping due to the driver's incorrect assumptions about the remaining battery power or the driving range based on that power. [Solution] An electric vehicle 1 that runs on a motor, comprising: a main battery 11A provided to supply stored power to the motor; at least one sub-battery 11B provided to supply stored power to the motor; and a battery management device that individually manages the main battery 11A and the sub-battery 11B with respect to charging and power supply to the motor. [Selection Diagram] Figure 3

Inventors

  • 池端 高道

Assignees

  • 丸上若葉工業株式会社

Dates

Publication Date
20260508
Application Date
20241022

Claims (8)

  1. An electric vehicle that runs on a motor, A main battery is provided to supply the stored power to the motor, A sub-battery is provided, at least one of which is capable of supplying the stored power to the motor, An electric vehicle comprising a battery management device that individually manages the charging of the main battery and the sub-battery and the supply of power to the motor.
  2. The electric vehicle according to claim 1, characterized in that the battery management device charges the main battery after charging the sub-battery, and completes charging of both the main battery and the sub-battery after charging the main battery.
  3. The system further includes a display device that shows the charge levels of the main battery and the sub-battery, The electric vehicle according to claim 2, characterized in that the battery management device displays the remaining power of the main battery, the total remaining power of the sub-battery, and the total driving range of the electric vehicle based on the remaining power on the display device after the main battery has been fully charged.
  4. The electric vehicle according to claim 3, characterized in that the battery management device displays the total remaining power and the total driving range on the display device, and then displays the remaining power of the main battery and the driving range of the electric vehicle based on that remaining power on the display device.
  5. The electric vehicle according to any one of claims 1 to 3, characterized in that the battery management device supplies power from the main battery to the motor when the charge level, remaining power, or the driving range of the electric vehicle based on the remaining power of the main battery is equal to or greater than a preset switching charge threshold.
  6. The electric vehicle according to claim 3, characterized in that the battery management device supplies power from the sub-battery to the motor when the charge level, remaining power, or the driving range of the electric vehicle based on the remaining power of the main battery is less than the switching charge threshold.
  7. The electric vehicle according to claim 6, characterized in that the battery management device displays the charge rate of the sub-battery on the display device when the charge rate, remaining power, or driving range of the electric vehicle based on the remaining power of the main battery is less than the switching charge threshold.
  8. The electric vehicle according to claim 6, characterized in that the switching charging threshold is set according to the land area of the country in which the electric vehicle is sold.

Description

This invention relates to a battery for an electric vehicle. Efforts are being made to promote electric vehicles (EVs) to reduce carbon dioxide emissions, which have a negative impact on the natural environment. However, in recent years, various disadvantages of using EVs have become apparent, and support measures for the manufacture and purchase of EVs have been discontinued in various countries, hindering further increases in EV adoption rates. Disadvantages of using electric vehicles include the insufficient number of charging stations for electric vehicle batteries, and the fact that battery power is consumed not only by driving the vehicle, but also by various in-car devices such as air conditioning and car navigation systems. In electric vehicles, if the displayed driving range is based solely on the power required for propulsion, the driver may assume a longer driving range than is actually possible. As mentioned above, the number of charging stations is insufficient, so if there are no charging stations within the driver's assumed driving range, the electric vehicle may become inoperable before reaching a charging station. Furthermore, as a technology for displaying the power of an electric vehicle battery, an example of a battery charge management device is provided (see Patent Document 1). This device involves a CPU performing the following steps: extracting charging stations existing in a target area from map data as specific stations; calculating charging information as set charging information, assuming the battery is charged for a set charging time at the specific station; and outputting the set charging information along with the location information of the specific station. The charging information includes at least one of the following: the predicted increase in the battery's charge rate; the predicted charge rate of the battery after charging; and the vehicle's driving range corresponding to the predicted charge rate. Japanese Patent Publication No. 2024-33835 This is a schematic front view showing an electric vehicle according to an embodiment.This is a schematic rear view showing an electric vehicle according to an embodiment.This is a schematic side view showing an electric vehicle according to an embodiment.This is a schematic side view showing an electric vehicle according to the first modified example.This is a schematic side view showing the seats of an electric vehicle according to the second modified example.This is a block diagram showing the hardware configuration of a battery management device for an electric vehicle according to an embodiment.This is a block diagram showing the functional configuration of a battery management device for an electric vehicle according to an embodiment.This flowchart shows the operation of the charging control process according to the embodiment.This is a flowchart showing the operation of the power supply control process according to the embodiment. The embodiments of the present invention will be described below with reference to the drawings. In this specification and the drawings, components having substantially the same functional configuration are denoted by the same reference numerals, thus omitting redundant explanations. (Outline of electric vehicle configuration) The schematic configuration of the electric vehicle according to this embodiment will now be described. Figures 1 to 3 are schematic front view, schematic rear view, and schematic side view of the electric vehicle according to this embodiment, respectively. Figure 4 is a schematic side view of the electric vehicle according to the first modified example. Figure 5 is a schematic side view of the seats of the electric vehicle according to the second modified example. As shown in Figures 1 to 3, the electric vehicle 1 according to this embodiment is a BEV (Battery Electric Vehicle) driven by a motor. However, the electric vehicle 1 may also be a HEV (Hybrid Electric Vehicle) or a PHEV (Plug-in Hybrid Electric Vehicle). The electric vehicle 1 is equipped with a main battery 11A and a sub-battery 11B in its body 10. The main battery 11A and the sub-battery 11B may be of any type of rechargeable battery, and they may be of the same type or different types. Furthermore, the electric vehicle 1 may be equipped with multiple sub-batteries 11B. The main battery 11A and the sub-battery 11B are both located at the bottom of the vehicle body 10, between the front and rear wheels. The main battery 11A is located further forward than the sub-battery 11B, and the sub-battery 11B is located further rearward than the main battery 11A. Note that the main battery 11A and the sub-battery 11B may be located anywhere on the vehicle body 10. For example, the sub-battery 11B may be located in the cargo area of the vehicle body 10, as shown in Figure 4, or inside the seat 12 located on the vehicle body 10, as shown in Figure 5. (Configuration of the battery management device) The hardware configuration a