18650 rechargeable battery lithium 3.7v 3500mah
CH
About Us
Company Profile Development History Sales Network Partner Social Responsibility
Products
Rechargeable Battery Battery Packs Energy Storage Battery Primary Battery Handicraft Article
Subsidiary Company
SINO TECHNOLOGY SUNBEAM GREEN POWER DATAPOWER SEONG-HEE STD
Honor
Qualification Certificate Patent Certificate Honor Certificate
R&D
R&D Center Test Center
News
Company News Industry News
Contact Us
18650 rechargeable battery lithium 3.7v 3500mah
18650 rechargeable battery lithium 3.7v 3500mah

Other information

Home  >  Other information

Lithium battery sharing three major core functions of BMS

release time:2023-02-07 Hits:     Popular:AG11 battery

  Lithium Battery GN72100

  The BMS electric vehicle battery management system is an important link to connect vehicle power batteries and electric vehicles.

  The important information of the BMS in real -time collection, processing, and storage battery packs, exchange information with external devices such as vehicle controller, and solve key issues such as safety, availability, ease of use, and service life in the lithium battery system.

  The main role is to improve the utilization rate of batteries, prevent excessive charging and excessive discharge of batteries, and extend the service life of the battery.

  Monitor the status of the battery. In popular terms, it is a system of management, control, and battery pack.

  The three most core functions of BMS are battery cell monitoring, load power status (SOC) estimation, and single battery equilibrium.

  1. Core monitoring technology

  1. Collecting of single battery voltage; 2. Merodic battery temperature collection; 3. Battery box current detection.

  The accurate measurement of temperature is also very important for the working status of the battery pack, including the temperature measurement of a single battery and the temperature monitoring of the battery pack heat dissipation liquid. This requires a reasonable setting of the location and the number of uses of the temperature sensor, and forms a good cooperation with the BMS control module.

  The monitoring of the temperature of the battery set heat dissipation liquid focuses on the fluid temperature of the entrance and export. The choice of monitoring accuracy is similar to that of a single battery.

  2, SOC technology

  Single -core SOC calculation is the focus and difficulty of BMS. SOC is the most important parameter in BMS, because everything else is SOC as the

  The foundation, so its accuracy and robustness (also called error correction ability) are extremely important. If there is no precise SOC, no more protection function can make BMS work normally, because the battery will often be protected, and the life of the battery cannot be extended. The higher the accuracy of the SOC estimation, the higher the battery of the same capacity, which can make electric vehicles a higher range of mileage. High -precision SOC estimates can make the battery pack maximum efficiency.

  At present, the most commonly adopted calculation methods include the peaceful integration method and the opening voltage calibration method. By establishing a battery model and a large amount of data collection, the actual data is compared with the calculation data. This is also the technical secrets of each family. Accumulation, also the highest technical content in Tesla. Tesla has applied for more than hundreds of core patents related to BMS in the fields of battery cooling, safety, charge balance.

  3, equilibrium technology

  Passive equilibrium generally uses resistance heat to release the "extra power" of high -capacity batteries, thereby achieving a balanced purpose. The circuit is simple and reliable, the cost is low, but the battery efficiency is also low.

  During the active equilibrium charging, the excess electricity volume is transferred to a high -capacity battery cell. When discharging, the excess electricity volume is transferred to a low -capacity battery cell, which can improve the efficiency of usage, but the cost is higher, the circuit is complicated, and the reliability is low. In the future, as the consistency of the cells increases, the demand for passive balance may decrease.


Read recommendations:

Coin Battery CR 1616

Mobile lithium battery recognition memory effect.802540 polymer battery

Lithium phosphate iron and lithium battery principle.Column rechargeable battery

602248 battery

AG1 battery

Last article:Analysis of the common failure performance of lithium batteries and its failure mechanism

Next article:Several major factors affecting the performance of lithium battery

Popular recommendation

360° FACTORY VR TOUR
lithium ion battery 18650 priceWhatsapp
lithium ion battery 18650 price

lithium ion battery 18650 priceTel
+86 19925278095

lithium ion battery 18650 priceEmail
admin@sino-techgroup.com

TOP