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Onboard electric system for a motor vehicle

An electrical system, motor vehicle technology, applied in electric vehicles, electrical components, current collectors, etc., can solve problems such as low energy recovery efficiency and achieve good efficiency

Inactive Publication Date: 2011-07-06
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The efficiency of energy recovery via generator operation is also low during propulsion interruptions (Schubunterbrechung) when the state of charge of the battery is continuously high

Method used

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  • Onboard electric system for a motor vehicle
  • Onboard electric system for a motor vehicle
  • Onboard electric system for a motor vehicle

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Embodiment Construction

[0019] exist figure 1 In the simplified diagram of , 1 denotes the generator, 2 denotes the generator regulator, which regulates the output voltage supplied from generator 1 to its output terminals to a rated value, wherein the rated value is determined by the control signal received on line 3 Determined, 4 indicates the motor vehicle battery, 5 indicates the battery sensor, 6 indicates the generator control device for providing control signals, which predetermines the rated value of the output voltage for the generator regulator 2, 7, 8 indicates the load, 9 indicates electrical wires which connect the output terminals of the generator 1 with the battery 4 and the loads 7 , 8 .

[0020] The generator 1 and the generator controller 2 are combined to form a structural unit of a type known per se. The control signal on line 3 , which specifies the setpoint output voltage of generator 1 , is the only control signal which processes generator controller 2 . The control signal can...

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Abstract

The invention relates to an onboard electric system for a motor vehicle comprising an electric generator (1), a battery (4), a generator controller (6), and at least one consumer load (7, 8) being supplied by the generator (1) and the battery (4). The generator controller (6) is configured in order to provide the generator (1) with a target output voltage (Usoll+Udiff). The generator controller (6) is equipped to detect the load state (SOC) and the load current (list) of the battery (4), and to vary the target output voltage (Usoll+Udiff) of the generator (6) until the load current (list) assumes an amperage (lsoll) that is predetermined as a function of the load state.

Description

technical field [0001] The invention relates to an on-board electrical system of a motor vehicle. Background technique [0002] DE 100 52 315 A1 discloses an on-board electrical system with a generator, a battery rechargeable via the generator, a generator control device for controlling the power output of the generator and at least one load. The generator control unit is able to predetermine a nominal output voltage for the generator, which is supplied to the generator at its connection terminals. [0003] Furthermore, a setpoint battery current is predetermined in the known vehicle electrical system. In order to adjust this nominal battery current, the control device varies the electrical power output at a certain load. [0004] Typically, the generator of the on-board electrical system of a motor vehicle is connected to the battery and the load via wires of non-negligible length, over which a voltage drop occurs, which can be several tenths of a volt, depending on the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/16
CPCH02J7/16Y02T10/7005Y02T10/70
Inventor M.贝克C.加尔特纳R.莱迈尔
Owner ROBERT BOSCH GMBH
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