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A controller for low-voltage dc-dc converter of electric vehicle

A DC-DC and controller technology, which is applied in the controller field of low-voltage DC-DC converters of electric vehicles, can solve the problems of low control accuracy, poor control effect, and reduced service life of auxiliary batteries, so as to increase service life. , the effect of reducing energy loss, improving operational efficiency and performance

Active Publication Date: 2018-05-29
JIANGSU JINPENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the prior art does not take into account the state of the auxiliary battery, which may cause a reduction in the service life of the auxiliary battery, and the time to turn off the DC-DC converter or the amount to limit the output of the DC-DC converter is often set to a certain constant , the control precision is not high, and the control effect is not good

Method used

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  • A controller for low-voltage dc-dc converter of electric vehicle
  • A controller for low-voltage dc-dc converter of electric vehicle

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Embodiment Construction

[0018] The technical solution of the present invention will be described below in conjunction with the accompanying drawings, obviously, what is described is only a part of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] like figure 1 As shown, the electrical system of the electric vehicle includes: a motor 7 , a high-voltage battery 4 , an auxiliary battery 5 , a high-voltage DC-DC converter 2 , a low-voltage DC-DC converter 3 , and a controller 1 . The electric motor 7 is driven by the high-voltage battery 4, the high-voltage DC-DC converter 2 is used to convert the voltage input to or output from the high-voltage battery 4, and the low-voltage DC-DC converter 3 is used to convert the DC high voltage into a DC low voltage thereby The auxiliary battery 4 is charged...

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Abstract

The invention belongs to the field of vehicle electrical control, and specifically relates to a controller of a low-voltage DC-DC converter of an electric vehicle. The controller can accurately control operation of the DC-DC converter according to states of an auxiliary battery and states of vehicle load, so as to realize maximum efficiency of the DC-DC converter, and energy loss caused by the converter can be reduced, and service life of the auxiliary battery is prolonged.

Description

technical field [0001] The invention belongs to the field of vehicle electric control, and in particular relates to a controller for a low-voltage DC-DC converter of an electric vehicle. Background technique [0002] An electric vehicle usually has an electric motor, a high-voltage battery, an auxiliary battery, a high-voltage DC-DC converter, and a low-voltage DC-DC converter. The motor is driven by a high-voltage battery. The high-voltage DC-DC converter is used to convert the voltage input to or output from the high-voltage battery. The low-voltage DC-DC converter is used to convert DC high voltage to DC low voltage to charge the auxiliary battery. The auxiliary battery is used for providing power to vehicle electrical loads. Since the electrical components of the low-voltage DC-DC converter also need to consume a small amount of energy, especially when the load is low or no load, the overall efficiency of the DC-DC converter becomes lower due to its own loss. In order ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/00H02J7/00B60R16/033
Inventor 鹿世敏朱红军
Owner JIANGSU JINPENG GRP CO LTD