Vehicle power supply system

A technology for power supply systems and vehicles, applied in the field of power supply systems, can solve problems such as large output current, unstable operation of auxiliary equipment, and lower output voltage of auxiliary equipment batteries, and achieve the effect of preventing voltage reduction.

Pending Publication Date: 2020-08-07
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, when multiple auxiliary devices are used at the same time, the output current from the battery of the auxiliary device becomes large
When the output current output from the auxiliary equipment battery is large and the amount of change is large, the output voltage of the auxiliary equipment battery may drop, and the operation of various auxiliary equipment that receives power from the auxiliary equipment battery may become unstable. possibility of instability

Method used

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Embodiment Construction

[0024] Embodiments of the present disclosure will be described below based on the drawings. In addition, this indication is not limited to embodiment described here.

[0025] [Overall structure of the system]

[0026] figure 1 It is a diagram showing the overall configuration of the power supply system according to the embodiment. This power supply system is mounted on EVs, HVs, and the like. The high-voltage battery 10 is constituted by a secondary battery such as a lithium-ion battery, and has an output voltage of about several hundred volts. An inverter 60 is connected to the high-voltage battery 10 so that DC power is converted into AC power by the inverter 60 . A drive motor 62 with a large output is connected to the inverter 60 , and the vehicle runs with the output of the drive motor 62 . In this example, the drive motor 62 is a three-phase AC motor.

[0027] The input side of a DC / DC converter 12 is connected to the high-voltage battery 10 . Various configuratio...

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PUM

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Abstract

A power supply system for a vehicle includes a high-voltage battery (10) that supplies electric power to an on-vehicle motor, a low-voltage battery (20) that supplies electric power to a plurality ofon-vehicle auxiliary machines (22, 24), a DC / DC converter (12) that changes voltage of an output from the high-voltage battery (10) and supplies the resulting output to the low-voltage battery (20), and a controller (14) that detects a working state of at least one of the plurality of on-vehicle auxiliary machines (22, 24), and controls operation of the DC / DC converter in accordance with the detected working state.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Japanese Patent Application No. 2019-014149 filed on January 30, 2019, which is incorporated by reference in its entirety, including the specification, claims, drawings, and abstract Incorporated into this article. technical field [0003] The present disclosure relates to a power supply system of a vehicle including a DC / DC converter. Background technique [0004] Conventionally, electric vehicles (EVs) and hybrid vehicles (HVs) equipped with large-output motors for driving have been equipped with high-voltage batteries of several hundred volts or more as their power sources. On the other hand, for auxiliary equipment such as electronic equipment, lights, audio equipment, air-conditioning fans, radiator fans, electric brakes, electric power steering devices, and various control units, the auxiliary equipment is from about 12V. powered by the device battery. Although an alternat...

Claims

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Application Information

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IPC IPC(8): B60L1/00H02J7/00H02M3/156H02M3/157
CPCB60L1/00H02M3/156H02M3/157B60L1/12B60L58/20B60L2240/52B60L50/66B60R16/03B60T13/74B62D5/0457
Inventor 长本真
Owner TOYOTA JIDOSHA KK
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