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Charging device for vehicle, vehicle equipped with charging device, and offset correction method for current sensor

A technology of current sensor and charging device, which is applied in the direction of electric device, electric vehicle charging technology, secondary battery charging/discharging, etc., and can solve problems such as inability to accurately perform deviation learning

Active Publication Date: 2013-12-18
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the external power supply is connected to the power storage device through the charger, especially during the charging of the power storage device, when the current is actually not zero due to the interruption of the stop command signal line, the operation of the auxiliary load, etc., despite the shutdown command output to the charger, nor can bias learning be performed accurately

Method used

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  • Charging device for vehicle, vehicle equipped with charging device, and offset correction method for current sensor
  • Charging device for vehicle, vehicle equipped with charging device, and offset correction method for current sensor
  • Charging device for vehicle, vehicle equipped with charging device, and offset correction method for current sensor

Examples

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no. 1 example

[0038] figure 1 is an overall block diagram of a vehicle including a charging device according to a first embodiment of the present invention. Such as figure 1 As shown, the vehicle 10 includes a power storage device 12 , a power control unit (hereinafter referred to as “PCU”) 14 , a power output device 16 , drive wheels 18 , and an auxiliary load 20 . Additionally, the vehicle 10 further includes an inlet 22 , a charger 24 , a controller 26 , a current sensor 28 and a voltage sensor 30 .

[0039]The power storage device 12 is a rechargeable DC power source formed of, for example, a secondary battery such as a nickel-metal hybrid battery and a lithium ion battery. The power storage device 12 stores not only electric power supplied from an external power source and input from the inlet 22 but also electric power generated by the power output device 16 . It should be noted that a capacitor with a relatively large capacitance can be used as the power storage device 12 .

[00...

no. 2 example

[0074] When the deviation learning of the current sensor 28 cannot be properly performed due to a negative current stop determination or the like, if the external charging continues in this state, the power storage device 12 may be overcharged. Specifically, when the value detected by the current sensor 28 shifts to the discharge side, the current sensor 28 recognizes a charging current smaller than the actual charging current as the charging current. Thus, during external charging, a charging current exceeding the upper limit may flow.

[0075] Furthermore, when the value detected by the current sensor 28 is shifted to the charging side, the current sensor 28 recognizes a charging current larger than the actual charging current as the charging current. Here, for the full charge determination during external charging, the open circuit voltage (OCV) of the power storage device 12 is used, and the OCV is related to the state of charge (SOC) of the power storage device 12 , and i...

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PUM

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Abstract

A vehicle (10) is configured to be able to charge an electrical storage device (12) using an external power supply outside the vehicle. A charger (24) receives electric power supplied from the external power supply to charge the electrical storage device (12). A current sensor (28) detects a current (IB) input to or output from the electrical storage device (12). During external charging, when the charger (24) and the auxiliary load (20) are turned off and a determination condition for determining that the current (IB) is zero on the basis of the value detected by the current sensor (28) is satisfied, the controller (26) carries out offset learning of the current sensor (28).

Description

technical field [0001] The present invention relates to a charging device for a vehicle that charges a power storage device using a power source external to the vehicle, a vehicle equipped with the charging device, and an offset correction method for a current sensor. Background technique [0002] As environmentally friendly vehicles, vehicles such as electric vehicles and hybrid vehicles have been in the spotlight. An electric vehicle is equipped with a power storage device, an inverter, and an electric motor as a power source for driving the vehicle. The electric motor is driven by an inverter. A hybrid vehicle is equipped with an electric storage device, an inverter, and an electric motor as a power source for driving the vehicle in addition to an existing internal combustion engine. In such vehicles, in order to manage input and output of the power storage device, a current sensor for detecting current input to or output from the power storage device is provided. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18B60L3/00G01R31/36H01M10/48
CPCB60L2260/42H01M10/44H01M10/48Y02T90/14G01R35/005Y02T10/7072B60L53/20B60L58/10B60L58/15Y02T10/70Y02E60/10B60L3/0046Y02T90/12
Inventor 光谷典丈神谷庆
Owner TOYOTA JIDOSHA KK