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Power supply control device

A technology of power control device and charging control, applied in circuit devices, battery/fuel cell control devices, battery circuit devices, etc., can solve problems such as insufficient fuel efficiency

Inactive Publication Date: 2015-11-25
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that improvement in fuel efficiency cannot be sufficiently realized

Method used

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Examples

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Effect test

Deformed example 1

[0067] In the above-described embodiment, a lithium ion battery is used as the second battery, but other batteries may also be used. For example, a nickel-metal hydride battery may be used as the second battery. In showing the OCV vs. SOC characteristics of NiMH batteries, with figure 2The characteristics of the lithium-ion battery shown are similar, and the value of OCV is always large in the predetermined SOC range compared with the above-mentioned characteristics of the lead battery. By using a battery having such characteristics as the second battery, the same effects as those of the above-described embodiment can be obtained.

Deformed example 2

[0069] In the above embodiments, the vehicle is a vehicle equipped with only an engine as a power source, but instead of this vehicle, a hybrid vehicle equipped with an engine and a motor (electric motor) as a power source may be used.

Deformed example 3

[0071] In the above-described embodiments, part of the functions realized by software may be realized by hardware (such as an integrated circuit), or part of the functions realized by hardware may also be realized by software.

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PUM

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Abstract

A power supply control device comprises: a generator (10) driven by an engine; a lead acid battery (30) and a lithium ion battery (40) connected in parallel to the generator; an SOC detector that detects SOC of the lead acid battery; and a charge controller (70) that controls charging of the lead acid battery. The charge controller performs the charge control based on a regenerative predictive value estimated according to vehicle state information (step S130) when the SOC is greater than a threshold SL1. The charge controller performs the charge control irrespective of the regenerative predictive value (step S170) when the SOC is less than SL1. When the charge surplus of the lithium ion battery is larger than a charge deficiency of the lead acid battery (step S150: YES), the charge controller performs the charge control based on the regenerative predictive value, regardless of whether the SOC is less than SL1 (step S130).

Description

technical field [0001] The present invention relates to a power supply control device mounted on a vehicle. Background technique [0002] A vehicle that uses an engine as a power source for running includes: a battery (storage battery) that supplies power to various electrical loads; and an alternator (generator) that is driven by the rotation of the engine and generates electricity. Use the alternator to charge the battery. Conventionally, as charging control when charging a battery, techniques are known in which fuel consumption is saved by suppressing charging to the battery during normal running, and the battery is charged using regenerative power generation during deceleration running. [0003] In addition, Japanese Patent Application Laid-Open No. 2005-160269 describes a technique in which, in order to protect the battery life, when the SOC (StateOfCharge: state of charge) of the battery is lower than a predetermined threshold value, the above-mentioned charge control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18H02J7/00
CPCB60L11/1861B60L7/10B60L11/08B60L11/1868B60L2260/50H02J7/0077H02J7/1423H02J7/16Y02T10/70H02J7/1415H02J7/1492B60L50/13B60L53/20B60L58/20H02J7/00306H02J7/00302H02J2310/48H02J7/00712H02J7/00047Y02E60/10Y02T10/7072Y02T90/14H02J7/0019H01M10/0525H01M10/06H01M10/441H01M2220/20B60L58/12
Inventor 松永昌树江岛和仁铃木健明
Owner TOYOTA JIDOSHA KK