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Battery system for electric vehicle

A technology for electric vehicles and battery systems, applied in the direction of electric vehicle charging technology, electric vehicles, non-aqueous electrolyte batteries, etc., to achieve the effect of preventing high-speed deterioration

Active Publication Date: 2017-07-14
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Furthermore, WO 2013 / 046263 describes that if charge / discharge of a secondary battery is deactivated, an increase in the rate of resistance increase (ie, high-speed deterioration) due to charge / discharge restarted after the deactivation is suppressed

Method used

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  • Battery system for electric vehicle
  • Battery system for electric vehicle
  • Battery system for electric vehicle

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Embodiment Construction

[0037] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same or equivalent parts in the drawings are denoted by the same reference numerals, and description thereof will not be repeated in principle.

[0038] figure 1 is a schematic configuration diagram of a battery system for an electric vehicle according to a first embodiment of the present invention.

[0039] refer to figure 1 , the electric vehicle 100 runs with an on-vehicle secondary battery as a vehicle drive power source. For example, electric vehicle 100 is constituted by a hybrid car or an electric car. A hybrid vehicle is a vehicle that includes, in addition to a battery, a fuel cell, an engine, and the like as a driving power source to run the vehicle. An electric vehicle is a vehicle including only a battery as a driving power source of the vehicle.

[0040] Electric vehicle 100 includes secondary batt...

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Abstract

A nonaqueous electrolyte secondary battery is a battery system for an electric vehicle which prevents high rate deterioration. An integrated evaluation value which is a deterioration index value of high rate deterioration is subjected to correction processing reflecting a recovery behavior of the high rate deterioration during charging / discharging deactivation in a battery deactivation period. The correction processing is executed according to a relaxation coefficient indicating the degree of relaxation of deviation of an ion concentration each time a given time elapses when the battery deactivation period ends. The relaxation coefficient is set variably such that, when a time length of the battery deactivation period is short, the degree of relaxation of deviation of the ion concentration for the given time becomes greater than that when the time length is long.

Description

technical field [0001] The present invention relates to a battery system for an electric vehicle, and in particular, to a battery system including a non-aqueous secondary battery for a vehicle driving power source. Background technique [0002] A non-aqueous secondary battery having a non-aqueous electrolyte typified by a lithium ion secondary battery is used for a vehicle drive power source (vehicle power source) of an electric vehicle such as a hybrid car, an electric car, or a fuel cell car. As one factor causing the resistance increase of the non-aqueous secondary battery, there is known a phenomenon in which high-speed charge or discharge is continuously )) lead to increased resistance, the so-called high-speed degradation. [0003] International Publication No. 2013 / 046263 describes the method of accumulating threshold values ​​of evaluation values ​​(D(N)) of deterioration due to ion concentration deviations in electrolytes calculated based on current value histories...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/48H01M10/42H02J7/00B60L11/18
CPCB60L58/10H01M10/425H01M10/48H02J7/00H01M2010/4271H01M10/486B60L2240/545B60L2240/547B60L2240/549B60L2240/80B60L2260/44H01M10/052H01M10/44H01M2220/20B60L58/16B60L58/15Y02E60/10Y02T10/70Y02T90/12Y02T10/7072Y02T90/14B60L53/20
Inventor 桥本展信
Owner TOYOTA JIDOSHA KK