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Battery charge/discharge control device and hybrid vehicle using the same

A charge-discharge control, charge-discharge technology, used in battery/fuel cell control devices, hybrid vehicles, battery circuit devices, etc., can solve the problem of battery becoming overcharged, etc., to suppress overcharge, avoid overheating and/or The effect of reduced performance

Active Publication Date: 2011-06-08
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the battery is charged with the power obtained by regeneration beyond the limit, the battery will become overcharged.

Method used

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  • Battery charge/discharge control device and hybrid vehicle using the same
  • Battery charge/discharge control device and hybrid vehicle using the same
  • Battery charge/discharge control device and hybrid vehicle using the same

Examples

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Embodiment Construction

[0040] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0041] figure 1 An example of the configuration of the battery charge and discharge control device of the present embodiment used in a hybrid vehicle is shown in . Here, the battery in this specification is a lithium-ion secondary battery, and the term "lithium-ion secondary battery" in this specification includes a lithium-ion secondary battery using an electrolytic solution as an electrolyte, and a lithium-ion secondary battery using a polymer gel as an electrolyte. Lithium polymer batteries are meant to be used.

[0042] Such as figure 1 As shown, the battery charge and discharge control device 20 of this embodiment includes: a battery electronic control unit 22 (hereinafter referred to as "battery ECU 22 ") that monitors the state of the battery 10; an SOC estimation unit 24 that estimates the state of charge of the battery 10; The electric motor electronic control...

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Abstract

A battery charge / discharge control device (20) includes an input-enabled power adjustment means (40) having an input-enabled current calculation means (42) and an input power limit value calculation means (44). The input-enabled current value calculation means (42) uses a battery current value, a battery temperature value, and an estimated charge capacity value at the time ''t'' upon execution ofdetection, so as to obtain an input-enabled current value reduction amount per unit time during charge and an enabled current amount recovery amount per unit time when being left uncontrolled. Moreover, the input-enabled current value calculation means (42) calculates an input-enabled current value Ilim(t) to a battery (10) according to the previously calculated input-enabled current value Ilim(t-1) which has been calculated previously or the only initially set input-enabled current value Ilim(O). The input power limit value calculation means (44) calculates the battery input power limit value so that the input current limit target value obtained in accordance with the input-enabled current value Ilim(t) is greater than an actual battery current value. Thus, the input-enabled power to thebattery (10) is adjusted in accordance with the battery input power limit value.

Description

technical field [0001] The present invention relates to a battery (battery) charge and discharge control device and a hybrid vehicle equipped with the device. Background technique [0002] In an electric vehicle, drive wheels connected to a battery-driven electric motor are braked by regenerative braking force. At this time, the electric power generated by the electric motor is charged to the battery and recovered. However, if the battery is charged with the electric power obtained by regeneration beyond the limit, the battery will be in an overcharged state. In order to prevent this, a battery charge control device has been proposed that compares the battery voltage with a battery voltage limit to control battery charge so that the battery voltage does not exceed the battery voltage limit (for example, Patent Document 1). [0003] Patent Document 1: Japanese Patent Application Laid-Open No. 6-153314 Contents of the invention [0004] Generally speaking, lithium ion se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/10B60K6/445B60L11/14B60W10/26B60W20/00H01M10/44H01M10/48H02J7/00B60L50/16
CPCY02T10/6286B60W2520/10B60W2540/12Y02T10/7044B60W10/06B60W2510/244Y02E60/122B60W2710/0666B60L11/1887Y02T10/705B60W10/08B60L11/187B60L2240/423Y02T90/34H02J7/0073B60W2510/246Y02T10/7011H01M10/44H01M10/486H01M10/0525B60W2710/083B60W20/00B60L11/1862B60W10/26Y02T10/642H01M10/48B60L58/24B60L58/40H02J7/0071B60L58/15Y02E60/10Y02T10/64Y02T10/62Y02T10/70B60W20/13B60W2510/24Y02T90/40
Inventor 石下晃生泉纯太野崎耕酒井仁葛谷孝史町田清仁
Owner TOYOTA JIDOSHA KK
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