Analysis on the meaning of lithium battery protection board

The maintenance function of the lithium battery is generally completed by the maintenance circuit board and current devices such as PTC or TCO. The maintenance board is composed of electronic circuits, and accurately monitors the voltage and charge and discharge of the battery cells in an environment of -40℃ to +85℃. The current of the loop controls the on and off of the current loop immediately; PTC or TCO prevents severe damage to the battery in high temperature environments. The maintenance board generally includes control IC, MOS switch, JEPSUN fine resistance and auxiliary device NTC, ID memory, PCB, etc. In the meantime, the IC is controlled to control the MOS switch to turn on under all normal conditions, so that the battery cell communicates with the external circuit, and when the battery cell voltage or loop current exceeds the specified value, it immediately controls the MOS switch to turn off (tens of milliseconds). Maintain the safety of batteries. NTC is the abbreviation of Negativetemperaturecoefficient, which means negative temperature coefficient. When the ambient temperature rises, its resistance decreases. The use of electrical equipment or charging equipment responds in time and controls internal interruptions to stop charging and discharging. ID memory is often a single-wire interface memory. ID is the abbreviation of Identification, which means identification, and stores information such as battery type and processing date. It can limit the traceability and application of the product. PTC is the abbreviation of PositiveTemperatureCoefficient in English, which means positive temperature coefficient. Professionals generally refer to positive temperature coefficient devices as PTC for short. In battery products, PTC can prevent the occurrence of battery high temperature discharge and unsafe high current. According to the battery's voltage, current density characteristics and operating environment, PTC has special requirements. PTC is a very important component in battery pack products, and it bears an important mission for battery safety. Its performance and quality are also an important factor of battery pack performance and quality. When the maintenance board maintains a single battery cell, the maintenance board planning is relatively simple. The technicality is relatively high. For example, the power lithium-ion battery maintenance board needs to pay attention to the voltage channel problem. The power lithium-ion battery is often required to be used in the application. Large channel voltage, so when planning the maintenance board, try to make the maintenance board not affect the battery discharge voltage, so that the requirements for the control IC, fine resistance and other components will be very high. Generally, domestic ICs can meet the requirements of most products. Using imported products, current sampling resistors need to use JEPSUN resistors to meet the requirements of high precision, low temperature coefficient, and no inductance. For the multi-cell maintenance board planning, there are higher technical requirements. According to different needs, products with different levels of clutter are planned. Disclaimer: The articles published on this website are all from the Internet. If there is any infringement, please contact to delete it. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.