Project Introduction:
This project is mass-produced on SAIC E50 electric vehicle. It is the E50's low-voltage energy management system and charge and discharge management system. The main functions of this system can be summarized into 4 items.
The first is to control the energy source of the vehicle's high-voltage conversion and low-power system (power electronic control).
The second is to manage low-voltage batteries and power grids and intelligently energy-saving charging and discharging.
The third is to control, limit or support the energy flow of the load and the power system.
The fourth is to save fuel or power refined control.
Existing technical problems are mainly solved through the mathematical control model of PMU:
1 The status quo of extensive energy design: The energy consumption reduction measures for traditional vehicles and hybrid and electric vehicles often only have the main solutions such as "hybrid" and "electric", but every detail is not refined. When it comes to energy conservation, it is said that although the hybrid has significantly reduced emissions, it has failed to drain all the potential of every component. The automotive industry needs innovative ideas to software model the efficiency of each piece and implement lean control ideas at the highest efficiency point.
2 Monopoly: Energy emission reduction control algorithms and hardware are almost monopolized by Bosch Continental Haila and others in Europe through technology to form trade barriers and tax barriers. Moreover, Bosch must use its entire system with a battery controller. The embedded monopoly makes car companies very passive. The PMU system breaks this monopoly.
3 Electricity ignores comfort: The current situation only requires electricity supply but ignores the comfort of electricity. For example, the current of the oil pump is very sensitive when adding the throttle. If it can be improved instantaneously, the power can be changed. For example, if the power supply for sensitive steering is insufficient, it will feel a little underpowered, or if the air conditioner is used to control the appropriate current through mathematical models, which can maximize the comfort of existing hardware.
4 Poor energy-saving methods: Existing brake energy recovery and passive BOOST designs fail to effectively achieve no secondary recovery and low secondary power efficiency, but SAIC PMU has these two patented technologies.
5 No energy warning: The current situation is that the direct reaction of the car running out of electricity is that the car cannot start early the next day, or it directly limps or stalls (Roewe has experienced). The complaints caused by not being able to start the car at work are very big. If there is advance warning, it can be done to save power and replenish power.PMU's risk model mathematical algorithm can solve the problem.
6 Error-free use of energy and overload use of energy control: Motors (more than 15 types in cars) start for too long or are blocked without corresponding algorithm control. Even if the customer forgets to turn off the headlights, the entertainment heating bus is not dormant, you cannot let it use electricity. An algorithm should be used to make up for mistakes. There are algorithms to solve this problem in PMU.
7 No energy control matrix in the ECU: In the past, only more than 100 functions of the BCM and the vehicle were designed, but we often forgot its energy control strategy. The first capability level of the correct design is to turn on the load at different levels of power risk. and function limit control, and the second capability level is to control energy constraint matrix for all hundreds of functions. This project is the second level. Ensuring energy security is actually about comfort and no immediate sensing function
8 Energy-free flexible load change control: The current situation is that when a load is added, for example, the moment the air conditioner is turned on, it will have an impact on the power of the whole vehicle. The design of the PMU should have a soft response algorithm to ensure that the power consumption is slowly increased.
9 Poor integration of distributed systems: Bosch and others use distributed systems for embedded monopoly but have poor integration. SAIC systems are centralized systems