1
What is?
48V mild hybrid system is based on a 12V battery, 48V increase a lithium-ion battery hybrid system in which, 12V circuit handles conventional electrical loads, such as lighting, ignition, audio systems. 48V circuit is responsible for supporting an active chassis system, air conditioner compressor and a regenerative braking system.
2
what’s the use?
mounted 48V vehicle light mixing systems may implement dynamic energy recovery, rapid engine start and engine power traction assist features, thereby improving the fuel economy of a vehicle to reduce emissions.
3
Principle
composed mainly of power recovery motor, the power conversion unit and the power battery composed of three core components. It is called mild hybrid because the system does not participate directly in the motor-driven vehicle is almost, but as a tool for energy recovery, to assist the engine, so that the entire vehicle electrical equipment as much as possible out of dependence on the engine, the engine more reasonable drive vehicle.
4
advantages
– as compared to the high-voltage hybrid system, lower cost.
* lower than 60V safe voltage, no additional voltage protection.
· operating current is only a conventional system under the same 12V power 1/4, lower loss.
* can directly drive a high load on the engine accessory, reducing engine load. Also support more powerful on-board equipment.
5
drawbacks
· voltage is increased, the electromagnetic compatibility requirements will be equipment improve.
there will be arcing at
· 48V voltage, there will be some potential risks.
· 12V car original equipment relocation to 48V, the need for re-development and testing, while the cost will be improved.
6
Further reading
BSG hybrid system
BSG (belt-drivenStarterGenerator) represents the low biaxial parallel hybrid: the way to take power transmission belt drive between the engine and the motor, an engine for the vehicle driving power source, a motor system for implementing quick start of the engine.
ISG hybrid system
ISG (IntegratedStarterGenerator) represents the uniaxial parallel hybrid Moderate: The engine torque and the motor power for mixing a superimposed manner, the engine and the motor and the transmission are connected in parallel, according to different driving conditions, torque of the motor torque of the engine before the various forms of the composite to achieve optimal transmission efficiency of the driving, the engine for the vehicle drive power source, the motor system be complementary.