Lithium Battery 3.7V Lithium Polymer Battery 3.2V LifePo4 Battery 1.2V Ni-MH Battery Button Coin Battery
3.7V Battery Pack 7.4V Battery Pack 11.1V Battery Pack 14.8V Battery Pack Other Battery Pack
Sino Science&Technology Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of Lifepo4 batteries,energy storage battery,portable UPS power supply,personalized customization lithium battery pack etc .
Environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery,3.7V lithium polymer battery, NiMH battery , NiCD battery ,Lead acid battery,dry cell battery ,alkaline battery ,heavy duty battery, button cell battery etc. we devote to R&D,innovation ,production & sales
Shenzhen Green Power Energy Battery Co.,ltd specializes in a wide range of digital battery such as environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery, 3.7V lithium polymer battery, NiMH battery, NiCD battery, dry cell battery, alkaline battery, heavy duty battery, button cell battery etc. we devote to R&D, innovation, production & sales. With automatic production machines we have been exported goods to all over the world over 15years. We have complete exported certificate such as KC, CE, UL, BSCI, ROHS, BIS, SGS, PSE etc
Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
Anhui Seong-hee New Energy Technology Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of primary batteries. And mainly produces and sells alkaline batteries & carbon zinc batteries. there are size AA, AAA, C, D, 9V etc
Guizhou STD Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production & sale of lithium polymer batteries, drone battery, airplane batteries & battery pack etc.
release time:2024-03-25 Hits: Popular:AG11 battery
CAN bus 18650 lithium-ion battery management solution
Accurate measurement of remaining battery capacity has always been a very critical issue in the development of electric vehicles. An effective battery management system helps improve battery life. Therefore, accurate estimation of battery SOC has become a central issue in electric vehicle battery energy management systems. If the SOC of the battery can be correctly estimated, the power provided by the battery can be rationally utilized and the service life of the battery pack can be extended.
The solution adopts bus-type networking and uses fieldbus to complete data exchange between various nodes. In the distributed solution, the multi-energy controller is the main control ECU, which communicates with multiple lower-level ECUs through the fieldbus. During the working process, the communication sub-module of each controller runs in the background in the form of a timer or interrupt to complete the sending and receiving of data and save the main process resource expenditure.
The SOC value of the battery is sent by the battery controller to the multi-energy controller through the CAN bus, and the working mode of the vehicle is determined by the multi-energy controller through certain logical algorithms by collecting information from each ECU. Once these parameters are determined, we can decide whether to start the engine or shut down the engine, and also decide in which state the motor should work. For example, when the SOC value of the battery is between 50% and 70%, the multi-energy controller calculates that the vehicle working mode is in the starting mode, which means that the current system has sufficient power energy and there is no need to turn on the engine. Moreover, the motor Can work as a driver.
2 System hardware composition
The battery controller can communicate with other control systems in the external car through the CAN bus network. A battery management ECU (electronic control unit) and 4 battery pack information detection ECUs; the single cells we use are combined into 24 battery packs. We configure a measurement unit for every 6 battery packs, that is, there are total battery packs ECU1 to ECU4. The 4 battery pack ECUs and the battery pack ECU form a CAN bus network, and a CAN controller and the battery pack ECU form the CAN inside the battery management system. network, another CAN controller and other control systems in the car form a vehicle optical fiber CAN bus network.
As shown in Figure 3, the embedded microcontroller used in the battery pack ECU is the p87C591 microcontroller, whose internal hardware integrates a CAN controller and an A/D analog-to-digital conversion module. Each battery pack ECU manages 6 battery packs, and its completed function is to measure the voltage and temperature information of the 6 battery packs, and send the collected information to the battery management ECU through the CAN bus. The voltages of the 6-channel battery pack are connected to the 6-channel A/D input port of p87C591 through the voltage conditioning circuit. The signal lines of the 6 temperature sensors are connected to the same IO port of p87C591.
Circuit design of 3CAN interface
In this design, p87C591 is used as the microcontroller. Among them, the interface circuit design between p87C591 and CAN driver chip is shown in Figure 4. It is mainly composed of three parts: p87C591, photoelectric isolation circuit, and CAN driver. Photoelectric isolation circuit: In order to further suppress interference, photoelectric isolation circuits are often used in CAN bus interfaces. The photoelectric isolator is generally located between the CAN controller and the transceiver.
The overall system program includes the initialization program and the main loop program, and its flow chart is shown in Figure 5:
The system is powered on first, and then initializes CAN and timers. The system waits for interrupts. If there is an interrupt, it determines the interrupt type. If it is an interrupt from the SJA1000 controller, it reads the data of the SJA1000 controller and releases the buffer. The operation is completed. Interrupt return, if it is a timer 50ms periodic interrupt, AD conversion is performed on the voltage and current data, the SOC value is calculated, and the relevant data is sent by CAN, and the interrupt returns after the operation is completed.
4 Conclusion
Data communication technology based on CAN bus has high reliability, real-time performance and flexibility. CAN bus has broad application prospects and development space in the application of nickel-metal hydride battery management systems for hybrid electric vehicles.
Read recommendations:
18650 lithium battery 3000mah.Selection of zinc alloy powder for low mercury in alkaline batteries
Last article:lithuim ion battery 18650
Next article:18650 battery 3.7v 2200mah
Popular recommendation
60v 80ah lifepo4 battery pack
2023-05-09801520 lipo battery company
2023-03-22601848 polymer battery
2023-03-22lithium battery 18650 Vendor
2023-03-22601435 battery Manufacturing
2023-03-22LR14
2022-11-16Rack-mounted energy storage battery GN-10240
2022-09-27LR03
2022-08-199V card-mounted carbon battery 6F22
2023-06-28Snow board shoulder strap set
2022-09-22522749 880mAh 3.7V
2022-07-01102540 1100mAh 3.7V
2022-08-19602535 500mAh 3.7V
2022-08-1918650 1500mAh 3.7V
2022-06-20L1325 4LR44
2022-10-09CR927 battery
2023-06-25Nickel Hydride No. 5 batteries
2023-06-2518650 battery 4800mah
2023-06-2527A battery
2023-06-25CR2032 button cell batteries
2023-06-25Standards of Lithium - Ion Battery Cell Production Process
2025-08-28What is the capacity of a 18650 lithium battery?16340 battery
2023-06-25Performance Testing of Lithium - Ion Battery Cell Materials
2025-09-22Master the three major characteristics of lithium iron phosphate battery.48v solar power energy stor
2023-03-15What is the difference between a battery and a lithium battery
2022-11-09Low -temperature work battery introduction.home energy storage lithium battery Factory
2023-05-13Summary and analysis of 18650 lithium battery pack technology
2022-12-17Battery module performance test
2022-12-29Common problems with lithium batteries and processing methods.602030 polymer battery
2023-06-10Current battery issues.18650 battery rechargeable
2023-08-14