Are there any important functions of BMS battery management test system?

The BMS battery system is commonly known as the battery nanny or battery housekeeper, which is mainly to intelligently manage and maintain each battery cell, prevent the battery from overcharging and overdischarging, prolong the service life of the battery, and monitor the status of the battery. The BMS battery management system unit comprises a BMS battery management system, a control module, a display module, a wireless communication module, an electrical equipment, a battery pack for supplying power to electrical equipment and a collection module for collecting battery information from a battery pack, the BMS battery management system is connected with a wireless communication module and a display module respectively through a communication interface, and the output end of the acquisition module is connected with the input end of the BMS battery management system, The output end of the BMS battery management system is connected with the input end of the control module, the control module is connected with the battery pack and the electrical equipment respectively, and the BMS battery management system is connected with the server end by the wireless communication module. <>

Battery testing in our laboratory is generally done by two types of people, one is just here, through the test can have an intuitive understanding of the battery, so that it is convenient to do a deeper understanding in the future, of course, the design of the test scheme and the operation of the equipment need to be taken by the senior brother for a period of time; One is those who have studied to a certain point and hope to verify their theories through data. I don't know much about the job of a battery tester, but just testing batteries is indeed enough for undergraduates, and of course, the knowledge of electrical and English must be solid enough. In practice, there are probably tests that you won't do in school, extreme tests.

This kind of test is extremely dangerous, even if the manufacturer says that it is safe, there is a possibility of safety, from the battery bulge to the first time is very short, and the serious will be life-threatening. Even in our laboratory, the battery that was good one second will break the next, no one knows why, and the manufacturer who made the battery itself does not know. The major needs to be engineering, do various tests and verifications of BMS, as well as analyze the collected messages, find problems, make reports, and need to have basic knowledge of electrochemistry, electrical engineering, material mechanics, mechanics, physics, etc.

In a word, I understood the circuit diagram, connected various wiring harnesses, learned logical timing analysis, and wrote a summary report. <>

To put it simply: collect battery information, calculate battery status parameters, and communicate with external controllers.

The battery system includes: structure, hardware, software. The structure is used to wrap the battery body, which is composed of battery cells and modules, and the modules are composed of battery packs; The battery pack plus the high and low voltage wiring harness, plus the contactor, constitutes most of the battery system; Together with the BMS controller (both software and hardware), you make up the whole battery system.

The body that provides energy (battery pack) has been said, so how can the battery pack provide energy without damaging the battery? That's what a BMS controller does: battery management.

The process of battery management is as follows:

1) Real-time monitoring of battery status.

By detecting the external characteristic parameters of the battery (such as voltage, current, temperature, etc.), and using appropriate algorithms, the internal state of the battery (such as capacity and SOC, etc.) can be estimated and monitored, which is the basis and key to the effective operation of the battery management system.

2) Carry out thermal management, battery balancing management, charge and discharge management, fault alarm, etc. after correctly obtaining the state of the battery;

3) Establish a communication bus to realize data exchange to display systems, controllers, etc.

To sum up, the workflow of the BMS control system is to collect the voltage, temperature and other signals of the battery cell, transmit them to the control system, and estimate the battery status (SoC, SOH) for the control function of the BMS. The control functions mainly include fault alarm, thermal management, balance management, charge and discharge management, etc.

Measuring instruments used for these tests:

High-precision multi-channel recorders (e.g. MX100) monitor and record parameters such as voltage, current and temperature for a long time;

A high-precision power analyzer (e.g., WT3000E) provides accurate measurements of charging efficiency, battery level, etc.;

The CAN bus analysis function of a digital oscilloscope (e.g., DLM2000) can decode CAN data in the battery management system in real time and capture error frames;

The recorder (e.g. DL850EV) monitors the various sensor signals transmitted in the CAN bus of the battery management system via the CAN bus monitoring module.

The role of BMS: the core component of battery protection and management, in the power battery system, its role is the same.

When it comes to the human brain. It should not only ensure the safe and reliable use of the battery, but also give full play to the energy of the battery.

force and prolong service life, as a bridge between the battery and the vehicle controller as well as the driver communicates, through control.

The contactor controls the charging and discharging of the power battery pack, and reports the basic parameters and causes of the power battery system to the VCU.

Barrier information. The function of BMS is to realize the power battery system through voltage, current and temperature detection functions.

Voltage, undervoltage, over-current, over-high temperature and over-low temperature protection, relay control, SOC estimation, charge and discharge management,

Functions such as balance control, fault alarm and processing, communication with other controllers, etc.; In addition, the battery management system.

It also has the function of detecting the insulation of the high-voltage circuit and heating the power battery system.

Chilongju Intelligent Electric Pedal Bicycle VX: TeaSeller01, Like and follow, learn electric moped knowledge together - battery management system BMS introduction.

The main role of the battery management system is to manage the battery, mainly electric vehicles, whether it is a pure electric vehicle or a hybrid vehicle has a battery management system.

Generally, the battery management system structure is divided into a master control board and a slave control board, the slave control board is responsible for sampling battery information, and the slave control board is responsible for control.

The power battery is the power supply that provides power for tools**, mostly referring to the battery that provides power for electric vehicles, electric trains, electric bicycles, and golf carts.

Its main difference is from the starter battery used for starting the engine of a car. Valve-sealed lead-acid batteries, open-mouth tubular lead-acid batteries and lithium iron phosphate batteries are mostly used.

On July 31, 2018, the national monitoring and power battery traceability integrated management platform for new energy vehicles was launched in Beijing.

Automobile and motorcycle industry. It is mainly used to provide electrical energy for the starting, ignition of the engine and the use of on-board electronic equipment;

Industrial power systems. It is used for power transmission and substation, providing closing current for power units, and providing backup power supply and communication power supply for public facilities;

Electric vehicle and e-bike industry. Replace gasoline and diesel as a driving power source for electric vehicles or electric bicycles.

New energy vehicles are favored because of their energy-saving and environmentally friendly characteristics, but the biggest problem facing their industrialization is high sales. From the perspective of foreign hybrid vehicles, the price difference between the same type of hybrid and fuel Toyota Camry reaches 8-100,000 yuan, while the price difference between domestic BYD pure electric vehicle E6 and the same type of fuel vehicle is as high as more than 200,000 yuan. Although the low cost of operation and maintenance of new energy vehicles in the later stage can gradually fill the price difference of a purchase, the high purchase ** has undoubtedly become an important obstacle to the industrialization of new energy vehicles.