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Vehicle and method for estimating charged state of secondary battery

A secondary battery, state-of-charge technology, applied in the direction of secondary battery charging/discharging, secondary battery, secondary battery repair/maintenance, etc., to achieve the effect of extending the driving distance and effective utilization

Active Publication Date: 2011-01-05
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

SOC is also called charge capacity or remaining capacity, etc.

Method used

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  • Vehicle and method for estimating charged state of secondary battery
  • Vehicle and method for estimating charged state of secondary battery
  • Vehicle and method for estimating charged state of secondary battery

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0045] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, in the drawings, the same reference numerals are assigned to the same or corresponding parts, and description thereof will not be repeated.

[0046] (overall structure of the vehicle)

[0047] figure 1 It is a figure which shows the main structure of the vehicle 1 which concerns on embodiment of this invention.

[0048] refer to figure 1 , the vehicle 1 includes: batteries B1, B2; boost converters 12-1, 12-2; smoothing capacitors CH; voltage sensors 10-1, 10-2, 13; inverter 14; engine 4; motor generators MG1, MG2; power distribution mechanism 3; and control device 30.

[0049] The batteries B1 and B2 mounted on the vehicle can be charged from the outside. Therefore, vehicle 1 further includes charger 6 having a connector connectable to commercial power supply 8 of, for example, AC100V or 200V, and connected to positive line PL1 and negative line ...

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PUM

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Abstract

A vehicle (1) comprising a chargeable / dischargeable battery (B1), a current sensor (11-1) for detecting the current from the battery, and a control unit (30) for estimating the charged state of the battery and controlling the charging / discharging of the battery according to the charged state. In a first operation mode in which charging and discharging cycles are repeated, the control unit (30) estimates the open-circuit voltage of the battery, and determines the charged state on the basis of the value which is obtained by correcting the open-circuit voltage according to the polarization. In asecond operation mode in which either one of charging and discharging is continued, the control unit (30) determines the charged state on the basis of the result of integration of the current detected by the current sensor. Hence, the charged and discharged amperehours are large, thereby providing a vehicle which can effectively utilize the secondary battery.

Description

technical field [0001] The present invention relates to a vehicle and a method for estimating a state of charge of a secondary battery, and more particularly, to a vehicle including a secondary battery and a control device for controlling charge and discharge of the secondary battery, and a method for estimating the state of charge of the secondary battery. Background technique [0002] In recent years, electric vehicles in which wheels are driven by electric motors and hybrid vehicles in which wheels are driven by both electric motors and engines have attracted attention as eco-friendly vehicles. In such a hybrid vehicle, the generator mounted on the vehicle is rotated to generate electricity by the power of the engine, and the generated electricity is used to charge the battery or supply power to the motor. However, it is also being studied that the battery can be charged from the outside. . Vehicles that can be charged at home or other places (hereinafter simply referred ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00B60K6/445B60L3/00B60L11/14B60L11/18B60W10/26B60W20/00H01M10/48B60L50/15B60L50/16
CPCY02T10/7066B60K6/365Y02T10/7005G01R31/3613G01R31/006B60K1/02H01M10/48Y02T10/7044Y02T10/6278Y02T10/7077B60L11/1868B60W2510/244B60L11/14Y02T10/56B60K6/28B60L2240/80G01R31/362B60K6/445Y02E60/12H02J7/1423Y02T10/6239B60L11/1861H01M10/44H02J7/0073B60L11/123Y02T10/6269Y02T10/6217B60W10/08B60W20/00B60W10/26G01R31/3832G01R31/3835B60L50/61B60L50/16B60L58/20H02J7/0071B60L58/15Y02T10/62Y02T10/70Y02T10/7072Y02E60/10B60W2050/0031B60W20/13Y02T10/40
Inventor 泉纯太
Owner TOYOTA JIDOSHA KK
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