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Battery systems for electric vehicles

A technology for electric vehicles and battery systems, applied in electric vehicle charging technology, electric vehicles, non-aqueous electrolyte batteries, etc., to prevent high-speed deterioration

Active Publication Date: 2019-05-31
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 systems for electric vehicles
  • Battery systems for electric vehicles
  • Battery systems for electric vehicles

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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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PUM

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Abstract

The invention relates to a battery system for an electric vehicle. A nonaqueous electrolyte secondary battery is a battery system for electric vehicles that prevents high-speed deterioration. Correction processing is performed on the cumulative evaluation value which is a degradation index value of high-speed degradation, which reflects the recovery behavior of the high-speed degradation during the charge / discharge cessation in the battery quiescent period. When the battery rest period ends, the correction process is executed based on a relaxation coefficient indicating the degree of relaxation of the deviation of the ion concentration every time a given time elapses. The relaxation coefficient is variably set so that when the time length of the battery rest period is short compared to when the time length of the battery rest period is long, the deviation of the ion concentration at the given time is eased. degree becomes larger.

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 Patents(China)
IPC IPC(8): H01M10/48H01M10/42H02J7/00B60L53/53
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