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Method and apparatus for electric power management in a vehicle

一种功率、功率转换的技术，应用在电能管理、车辆部件、车辆储能等方向，能够解决限制参考电压电平可容许范围等问题

Active Publication Date: 2015-03-11
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Known systems limit the tolerable range of the reference voltage level when the headlights are operating

Method used

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  • Method and apparatus for electric power management in a vehicle
  • Method and apparatus for electric power management in a vehicle

Examples

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Embodiment Construction

[0039] Referring now to the drawings, in which the illustrations are for purposes of illustrating certain representative embodiments only and not for purposes of limitation, figure 1 A vehicle 100 is schematically shown including a hybrid system 20 connected to a driveline 60 and controlled by a control system 10 . Like reference numerals refer to like elements throughout the description. The hybrid system 20 includes a mechanical power path including an engine 40 and an electrically powered torque machine (MGA) 35 mechanically connected to a hybrid transmission 50 having an output member 62 connected to a driveline 60 . The mechanical power paths that transfer torque between elements of the hybrid system 20 are shown with line elements 84 . Communication of signals and commands between elements of hybrid powertrain system 20 , including communication bus 18 , is shown with line element 82 . The electrical power transfer includes a high voltage electrical power connection 8...

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Abstract

An on-vehicle DC / DC converter transforms high-voltage electric power originating from an on-vehicle high-voltage source to low-voltage electric power at a regulated voltage level. The low-voltage electric power is distributed by a low-voltage bus. A method for operating the DC / DC converter includes monitoring a state of charge and a temperature of a low-voltage battery connected to the low-voltage bus, setting a DC / DC converter command to a nominal voltage level as a function of the state of charge and temperature of the low-voltage battery, monitoring a total low-voltage electric load, and adjusting the DC / DC converter command to a minimum low-voltage reference voltage when the vehicle is operating below a predetermined speed and the total low-voltage electric load is greater than a predetermined load.

Description

technical field [0001] The present invention relates to electrical power management. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0003] Vehicle systems, including electric and hybrid systems, employ electric power systems that use high and low voltage energy systems to provide power. Known high voltage systems include electric machines configured to generate traction torque and reacting driveline torque to generate electrical power. Known low voltage systems include electric motors configured to provide power to accessories such as headlights, air conditioner compressors, and electric power steering. Known electrical power systems include DC / DC power converters configured to convert high voltage electrical power to low voltage electrical power. Known DC / DC power converters for vehicle systems include a high voltage electrical power input, eg 330Vdc,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L11/18B60L1/00
CPCY02T10/7066B60L2240/545Y02T10/7044Y02T10/7216B60L2210/10Y02T10/7016B60L2240/12B60L11/1861Y02T10/7005B60L11/1868B60L58/15B60L58/20Y02T10/70Y02T10/72
Inventor S.戈帕拉克里什南C.S.纳穆杜里M.C.霍因卡S.M.奈克L.郝
Owner GM GLOBAL TECH OPERATIONS LLC
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