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Power management circuit, method and system

A power management and power conversion circuit technology, which is applied in the direction of circuits or fluid pipelines, road transportation emission reduction, efficient vehicle charging, etc., can solve the problem of large static power consumption, achieve static power consumption control, low energy consumption, Effect of Reducing Static Power Consumption

Active Publication Date: 2015-08-26
BEIJING BORGWARD AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is that in the prior art, the vehicle controller also supplies power to peripheral circuits in a sleep state, and the static power consumption is large, thereby providing a power management circuit and method capable of reducing static power consumption and system

Method used

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  • Power management circuit, method and system
  • Power management circuit, method and system
  • Power management circuit, method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0053] This embodiment provides a power management circuit, such as figure 2 As shown, it includes a power conversion circuit 1 , a microcontroller 2 and a CAN transceiver 3 .

[0054] The microcontroller 2 is used to control the CAN transceiver 3 to enter the dormant mode when the vehicle is parked or charged, so as to make itself and the power conversion circuit 1 both enter the dormant mode.

[0055] The CAN transceiver 3 is used to detect whether there is a wake-up signal, and enter the wake-up mode from the sleep mode when the wake-up signal is detected, so that the microcontroller 2 and the power conversion circuit 3 both enter the wake-up mode.

[0056] The power conversion circuit 1 includes a first output terminal and a second output terminal, and the first output terminal is used to supply power to the microcontroller 2, the CAN transceiver 3 and the peripheral circuit 4; the first output terminal The two output terminals output constant power, which are coupled wi...

Embodiment 2

[0069] On the basis of Embodiment 1, the power management circuit described in this embodiment, such as image 3 As shown, the power conversion circuit 1 includes a power conversion chip U1, which includes 20 pins, resistors R5, R6, R7, R8, R9, capacitors C4, C6, C7, and a voltage stabilizing capacitor C5.

[0070] The pin 9 of the power conversion chip U1 is connected to the pin 4 as the first output end; the pin 17 of the power conversion chip U1 is the second output end; one end of the resistor R7 is connected to the The first output end is connected, the other end is connected to the pin 6 of the power conversion chip U1, one end of the resistor R8 is connected to the first output end, and the other end of the resistor R8 is connected to the power conversion chip U1 at the same time. The pin 12 of the chip U1 is connected to one end of the resistor R9, the other end of the R9 is grounded, one end of the capacitor C6 is connected to the pin 19 of the power conversion chip U...

Embodiment 3

[0091] This embodiment provides a power management method, including the following steps:

[0092] When the vehicle is in the parking or charging state, the CAN transceiver is controlled to enter the sleep mode, and then the power conversion circuit and the microcontroller are all entered into the sleep mode, and then the power supply voltage of the CAN transceiver, the power conversion circuit, the microcontroller and the peripheral circuit is Low, but the wake-up voltage of the CAN transceiver remains high.

[0093] Detect whether there is a wake-up signal, and when a wake-up signal is detected, the CAN transceiver enters the wake-up mode from the sleep mode, and then the microcontroller and the power conversion circuit enter the wake-up mode. At this time, the CAN transceiver, the power conversion circuit, the microcontroller The power supply voltage of the controller and peripheral circuits is high level.

[0094] In a specific application, judging whether the vehicle is ...

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Abstract

The invention provides a power management circuit, method and system. A power-switching circuit of the power management circuit comprises a first output end and a second output end, the first output end is used for supplying power to a microcontroller, a CAN transceiver and a peripheral circuit, and the second output end provides awaking voltage for the CAN transceiver; when the power-switching circuit, the microcontroller and the CAN transceiver are in a sleep mode, that is, a vehicle control unit is not required to be supplied with power, the first output end outputs a low level, so that the static power consumption is reduced, meanwhile, the second output end outputs constant power to ensure the CAN transceiver to awake the microcontroller as required, and the vehicle control unit recovers the normal working state. When the peripheral circuit is not in the sleep mode, the first output end can output a high level to supply power to the peripheral circuit according to the actual condition. In conclusion, the power management circuit can perform power management on the vehicle control unit according to the actual condition, and the static power consumption is controlled at the lowest level.

Description

technical field [0001] The invention relates to a power management circuit, method and system. Specifically, it relates to a power management circuit, method and system in a vehicle controller. Background technique [0002] The vehicle controller is one of the core control components of new energy vehicles, and research on the vehicle controller is an important part of the development of new energy vehicles. The vehicle controller is responsible for collecting accelerator pedal signals, brake pedal signals and other component signals, and making corresponding judgments to control the actions of the various component controllers in the lower layer. The bus manages, schedules, analyzes and calculates network information. It plays a key role in the normal running of the car, regenerative energy recovery, network management, fault diagnosis and processing, vehicle status and monitoring. [0003] When an electric vehicle needs the vehicle controller to work, it is first necess...

Claims

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Application Information

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IPC IPC(8): B60R16/03
CPCY02T10/92
Inventor 赵俊桃
Owner BEIJING BORGWARD AUTOMOBILE CO LTD
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