New energy vehicles are now the focus of people's choice of cars, and
energy management is the core function of new energy vehicles. In the management
system of new energy vehicle batteries, the torque demand put forward by the
vehicle must go through the energy management module. According to the different
vehicle power hybrid methods, components, and strategies, the energy demand is
reasonably allocated to different drive systems. Today I will give What you are
introducing is the knowledge introduction to the management system of new energy
vehicle batteries. Let’s take a look with the editor.
New energy vehicle battery management system: definition
The new energy vehicle energy management system is a software and hardware
system that coordinates, distributes and controls the working energy of the
power system energy conversion device.
The hardware of the energy management system consists of sensors, control
units (ECUs), and actuators. The function of the software system is mainly to
analyze and process the sensor signals, optimize and analyze the working status
of the energy conversion device, and issue instructions to the actuators to
control its actions.
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New energy vehicle battery management system: composition
Different types of new energy vehicles have different energy conversion
systems, so their energy management software and hardware system devices have
different compositions. Taking pure electric vehicles as an example, the basic
components of the energy management system of pure electric vehicles include:
battery input controller, vehicle operating status parameters, vehicle control
status, energy management system ECU, battery output controller, motor power
generation system, etc.
The parameters input to the electronic control unit ECU of the energy
management system include the status parameters of each battery pack (such as
operating voltage, discharge current and battery temperature, etc.), vehicle
operating status parameters (such as driving speed, motor power, etc.) and
vehicle control status (such as braking). (moving, starting, accelerating and
decelerating, etc.), etc. The energy management system has the function of
real-time display of detected status parameters. The ECU infers and calculates
the detected status parameters according to a predetermined algorithm, and
issues appropriate control and display instructions to the battery, motor, etc.,
to achieve optimal management and control of battery energy.
New energy vehicle battery management system: introduction
1.State of charge indicator
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capacity ≥60%
The state-of-charge indicator is similar to the fuel gauge of a fuel
vehicle and represents the energy stored in the battery of an electric vehicle
and its driving range.
2. Battery Management System (BMS)
The battery management system is a subsystem of the energy management
system that detects and estimates battery status in real time to provide optimal
use of the battery pack. According to Dr. Bao Wei, president of Ligao Research
Institute, the battery management system is generally divided into two parts,
namely the host machine and the slave machine. The slave machine mainly collects
voltage and current, and the host machine mainly completes the calculation of
SOC, SOH, SOP and high-voltage Circuit control, thermal management, equalization
and other controls.
The main tasks of the battery management system are: preventing overcharge,
preventing over-discharge, temperature control and balance, energy system
information prompts, battery status testing and display, etc.
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