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:2024-03-21 Hits: Popular:AG11 battery
A simple analysis of three commonly used components for 18650 battery 3.7v 2000mah circuit protection
The batteries used in mobile phones are all lithium batteries, which may explode at high temperatures. In fact, this has happened and has had serious consequences. Therefore, most battery manufacturers will adopt protective measures. In addition to structural design, IC overcurrent protection and MOS tube protection, secondary protection components will also be used to strengthen protection measures.
There are three commonly used circuit protection components on mobile phone batteries: current fuses, thermal fuses and positive temperature coefficient thermistors. The use of different components reflects different protection requirements and different design concepts.
Current fuses are mainly used for short circuit protection:
The protection principle is that once the battery is short-circuited, the large overcurrent quickly breaks the thermal balance during normal operation, instantly raising the melt temperature to the melting point of the material, and the circuit will be disconnected, thereby achieving the safety protection function. The advantages of using a current fuse for protection include fast and complete circuit cutting and high precision of the fusing characteristics. Whether it is charging, in use or in standby, any short circuit in any part will act quickly. But it is only sensitive to current and does not respond to external temperature.
Thermal fuse is mainly used for overheating protection:
The protection principle is that the melt composed of low-melting electrical alloy material will melt once it encounters a temperature exceeding the allowable temperature, thereby cutting off the circuit to achieve safety protection. The advantage of using a thermal fuse for protection is that the melt is sensitive to both the internal and external temperatures of the component. Especially when the mobile phone is placed in a high-temperature environment or is overheated due to other reasons, it will act. However, the response to overtemperature caused by overcurrent is relatively slow. Slow, less accurate, and less reliable than current fuses.
Positive temperature coefficient thermistor is mainly used for overcharge protection:.
The protection principle is to utilize the positive temperature coefficient characteristics of pTC material resistance and the mutation characteristics of Curie point. That is to say, any temperature rise caused by any reason (including overcurrent and environment) will cause the material resistance to rise. Once it rises to the Curie point The resistance will become large enough to shut off the charging current and achieve safety protection function. The advantage of using thermistor protection is that it responds to both current and temperature, and can limit the current in a timely manner when the battery is overcharged. The disadvantage is that the response time is slow, there is still a small leakage current during shutdown, and the reliability is not high enough.
The positive temperature coefficient thermistor is also called a self-restoring fuse, but the self-restoring function is not necessary in the protection of mobile phone batteries, especially for overcurrent caused by circuit faults. If the fault is not eliminated and the pTC self-restorates, it will be detrimental to practical applications. It doesn't make sense.
There are also some low-end mobile phone batteries that, in order to save costs, do not use any protective components, or use zero-ohm resistors as protective components to deceive supporting factories or customers. This is irresponsible and poses considerable safety risks.
Read recommendations:
Brief introduction of Li ion battery
Last article:18650 battery 3.7v 2200mah
Next article:18650 battery 3.7v 1800mah
Popular recommendation
AA NiMH battery Manufacturing
2023-03-22battery 18650 rechargeable Product
2023-03-22lifepo4 battery pack 12v
2023-05-093.7V Lithium Polymer Battery
2023-03-22402427 polymer battery company
2023-03-22186095 6000MAH 7.4V
2023-06-10LR03
2022-08-19521133 160mAh 3.7V
2022-08-19Coin Battery LR 927
2022-10-15502030 200mAh 3.7V
2022-08-19Coin Cell BR 1632
2022-10-15102540 1100MAH 3.7V
2023-06-1218650 1800mAh 3.7V
2022-06-20801620 180MAH 3.7V
2023-06-10Coin Battery LR 1130
2022-10-15AG13 battery
2023-06-2518650 battery pack Manufacturing
2023-06-2518650 battery 3.7v 6000mah
2023-06-251.2V Ni-MH Battery
2023-06-25li ion 18650 battery pack
2023-06-25Why do express delivery companies stop transporting lithium batteries
2023-11-01Polymer lithium battery
2024-04-11902030 lipo battery.On the Self Protection Function of Lithium Batteries
2023-10-27CR2032 Button Cell Battery Overview
2025-01-07Use of lithium batteries by mobile phone manufacturers
2024-03-26How to judge the battery.portable energy storage battery power supply wholesaler
2023-05-06Lithium battery UPS system advantage.CR2477 battery
2023-06-07Analysis and solution for daily problems of lithium ion battery.lifepo4 200ah battery pack 12v
2023-03-28The difference between nickel -metal hydride batteries and lithium batteries.photovoltaic energy sto
2023-04-14Lithium power battery battery work electricity.102450 battery
2023-05-27