Dual-system starting electric energy auxiliary control method and system for 48V hybrid commercial vehicle
A technology for starting electric energy and auxiliary control, which is applied to vehicle components, circuits or fluid pipelines, transportation and packaging, etc. It can solve the problems of BSG motor being unable to start the vehicle alone, consuming battery power, and difficult to start the vehicle, so as to ensure reliability. and life, increase capacity, improve the effect of starting ability
Active Publication Date: 2021-01-22
DONGFENG COMML VEHICLE CO LTD
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Problems solved by technology
Traditional vehicles do not have high-voltage components similar to hybrid vehicles, and their power management is mainly the weak current management of the 24V / 12V low-voltage system. Compared with the power system of traditional vehicles, the power system of hybrid vehicles is based on the latter. BSG, MCU (MicroController Unit, microcontroller), power battery pack, BMS (Battery management system, battery management system) and other complex power electronic devices
[0003] For commercial vehicles with large engine power, the BSG motor cannot start the vehicle alone due to the power limit of the BSG motor. When the vehicle is started, the traditional starter is still required to start the engine. This process still consumes the power of the traditional battery.
Therefore, for 48V hybrid vehicles that need to use a starter to start the vehicle, they face the same problems as traditional vehicles: when the battery is aging, the power is insufficient, and the ambient temperature is too low, there is a phenomenon that the vehicle is difficult to start, and the repeated problems caused by the difficulty of starting Starting for a long time will accelerate the aging of the battery
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[0036] The embodiment of the present invention provides a dual-system start-up electric energy auxiliary control method for a 48V hybrid commercial vehicle. When the vehicle is about to start, the power battery is connected in parallel with the low-voltage battery of the vehicle through high-voltage conversion DC-DC to increase the capacity of the battery for starting. Improve the starting ability of the vehicle and effectively ensure the reliability and life of the vehicle's low-voltage battery. The embodiment of the present invention also provides a dual-system start-up electric energy auxiliary control system for a 48V hybrid commercial vehicle.
[0037] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviousl...
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The invention discloses a dual-system starting electric energy auxiliary control method and system for a 48V hybrid commercial vehicle, and relates to the field of automobile electronic control. The method comprises the steps that a PCU obtains the state of a power main switch and the state of an ignition lock; based on the obtained state information, the PCU judges the vehicle starting state; when the starting state of the vehicle is about to be the starting state, the power battery and the vehicle low-voltage storage battery are connected in parallel through high-voltage and low-voltage conversion DC-DC; and the PCU sends a starting signal to control a starter to start an engine to realize vehicle starting. The starting capacity of the vehicle can be improved, and the reliability and theservice life of the vehicle low-voltage storage battery are effectively guaranteed.
Description
technical field [0001] The invention relates to the field of automotive electronic control, in particular to a dual-system start-up electric energy auxiliary control method and system for a 48V hybrid commercial vehicle. Background technique [0002] The 48V mild hybrid vehicle is developed on the basis of traditional vehicles, and in order to realize some functions unique to the hybrid system, BSG (Belt-Driven Starter Generator, belt drive start / power generation) is added on the basis of traditional vehicles. integrated motor) and a 48V battery car. Traditional vehicles do not have high-voltage components similar to hybrid vehicles, and their power management is mainly the weak current management of the 24V / 12V low-voltage system. Compared with the power system of traditional vehicles, the power system of hybrid vehicles is based on the latter. BSG, MCU (MicroController Unit, microcontroller), power battery pack, BMS (Battery management system, battery management system) a...
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IPC IPC(8): B60R16/033
CPCB60R16/033
Inventor 郄鹤峰程学文曹亮钟小华蔡西张衡刘双平蒋学锋
Owner DONGFENG COMML VEHICLE CO LTD