Design of Electric Vehicle Power Management Communication System Based on CAN Bus
With the rise in oil prices and the increase in environmental protection requirements, electric power has become an important direction for future car development. For battery-powered all-electric power systems or for engine and battery hybrid systems, power management system design is an important factor in vehicle performance. The overall vehicle design and external environment must be considered in design, in order to save power. It is also necessary to design a certain control strategy to ensure the best use of the power supply. Therefore, it is necessary to conduct an in-depth discussion on the power management system of all-electric vehicles. The main purpose of electric vehicle power management is to make full use of the fuel's combustion efficiency, to make the engine work near the best working point, and to adjust the energy storage and output of the electric motor and battery to adjust the running condition of the vehicle and the external road conditions in time. Matching relationship. After more than ten years of development, the power system design of electric vehicles is currently the most practical and has a commercial operation mode, only hybrid vehicles. The hybrid system assembly has evolved from the original engine and motor discrete structure to the integrated structure of the engine motor and transmission, namely the integrated hybrid powertrain system. Therefore, only the power management of the hybrid system is considered here. Power management of hybrid systems, functionally, needs to achieve the following two goals:
The micro Vibration Motor is introduced:
Micro vibration motor is mainly used for adult health care products and toys, micro vibration motor is a Dc Motor, the motor shaft with an eccentric wheel, the use of most of the micro vibration motor voltage is lower than 6 v, probably between 6 mm to 15 mm in diameter, when the motor rotation, eccentric circle particles is not the core of the motor, the motor often lose their balance, due to the inertia effect.
Characteristics: small volume, strong vibration;
Operating temperature range:
Mini Vibration Motor should be used at a temperature of -10~60℃.
The figures stated in the catalog specifications are based on use at ordinary room temperature catalog specifications re based on use at ordinary room temperature (approximately20~25℃.
If a Mini Vibration Motor is used outside the prescribed temperature range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.Depending on the temperature conditions ,it may be possible to deal with them by changing the grease of the motor's parts.Please feel free to consult with us about this.
Storage temperature range:
Mini Vibration Motor should be stored ta a temperature of -15~65℃.
In case of storage outside this range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.
Service life:
â—Use with a load that exceeds the rated torque
â—Frequent starting
â—Momentary reversals of turning direction
â—Impact loads
â—Long-term continuous operation
â—Forced turning using the output shaft
â—Use in which the permitted overhang load or the permitted thrust load is exceeded
â—A pulse drive ,e.g.,a short break,counter electromotive force,PWM control
â—Use of a voltage that is nonstandard as regards the rated voltage
â—Use outside the prescribed temperature or relative-humidity range,or in a special environment.
â—Please consult with us about these or any other conditions of use that may apply,so that we can be sure that you select the most appropriate model.
when it come to volume production,we're a major player as well .each month,we rurn out 600000 units,all of which are compliant with the rohs directive.Have any questions or special needed, please contact us, we have the engineer group and best sales department to service to you Looking forward to your inquiry. Welcome to our factory.
Micro Vibration Motor,Mini Vibration Motor,Dc Micro Vibration Motor,Electric Micro Vibration Motor Shenzhen Shunchang Motor Co., LTD. , https://www.scgearmotor.com
(1) Guarantee the optimal working condition of the engine to avoid inefficient operation of the engine. The engine can usually be adjusted to operate stably around the optimum operating point, and the output of the battery and the motor can be adjusted to adapt to various external road conditions. For example, when the vehicle is in a low speed, coasting, or idle condition, the motor is driven by the battery pack, and the engine-motor unit and the battery pack collectively supply electric power to the motor when the vehicle is started, accelerated, or climbed. In this way, the engine is prevented from idling and low-speed operation, thereby improving the efficiency of the engine, not only reducing exhaust emissions, but also saving power.
(2) Make full use of the inertial energy of the vehicle. When the vehicle is decelerating, braking, or traveling downhill, the motor is driven by the inertial force of the wheel. At this time, the electric motor becomes a generator, which can charge the reverse battery and save fuel.
Statistics show that under the road conditions of more than 80%, an ordinary car only uses 40% of the power potential, and will fall to 25% in the urban area, while electric vehicles with power optimization management, such as Toyota's Prius, Its power has exceeded the level of its class, fuel savings of 75%.
The power management of electric vehicles needs to monitor the working conditions of the engine, electric motor, battery, vehicle running speed, driving resistance data and driver's operation at any time, and can automatically control the energy-saving device or circuit after intelligent processing according to the above data. Therefore, it is necessary to first solve the connection mode of the component operating state sensor related to energy consumption and energy conversion.
At present, the data communication between the internal measurement and execution components of the automobile mainly adopts the CAN bus technology. The bus technology was first introduced by the German company BOSCH, and is mainly used to solve the data exchange problem between many control and test instruments in modern automobiles. The electric vehicle power management system developed by CAN bus not only has high communication speed, accuracy, high reliability, but also is easy to be compatible with the vehicle control network, sharing sensor information, calculation information and operation status of each control unit, and on-board Or provide a basic platform for vehicle fault diagnosis, etc., so in this topic, the CAN bus is used as the basic communication technology for power management.
The CAN bus-based energy management network topology formed by the energy consumption of the chassis part of the electric vehicle is shown in Figure 1. It includes the brake energy conversion device, powertrain, battery management, motor controller, and driving resistance test. Several lower critical monitoring nodes and a higher-level master node composed of an on-board computer system. 
Figure 1 Energy management network topology based on CAN bus
The brake energy conversion device works in conjunction with the driver's control monitoring system and the battery motor controller. When the driver steps on the brake pedal, the brake motor is first brought close to the rotating device to be braked, such as the drive shaft, consuming the inertial energy of the vehicle and converted into electric energy, and the control monitoring system monitors the brake pedal when the battery is charged. The circuit is adjusted to realize the storage of electrical energy transmitted by the brake motor.
The powertrain system is mainly used to optimize the operation of the engine operating conditions. In the normal exercise situation, the energy of the engine is divided into two ways, one way is transmitted to the vehicle transmission and propulsion system, the driving vehicle is normally exercised, and the other road drives the motor to work and supplies power to the battery. At this time, the auxiliary power system composed of the motor and the battery is equivalent to an energy regulating device, and the battery motor controller and the driving resistance testing device are used to adjust and distribute the output energy of the two engines according to changes in the external road conditions.
Through the CAN bus, the upper master node composed of the on-board computer system connects the entire energy management and control network, and through the special software system, data acquisition, data analysis and control strategy output are realized, which realizes the relationship between the external driving resistance and the engine energy adjustment. Optimize the matching to realize the energy conversion and utilization inside the vehicle, and realize the regulation of energy saving, energy storage and supplementary energy of the motor and battery system.
Features: small size, fast speed, stable performance, low price, can use battery drive,Can change the different materials of the pendulum head
Method of use: the best stable in horizontal plane, installed on the dc Micro vibration motor output shaft parts, cannot use a hammer to knock, knock prone to press into the Micro vibration motor drive, may cause damage to internal components, and cannot be used in the case of blocked.
