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:2024-03-04 Hits: Popular:AG11 battery
The lithium battery protection board is to protect the charge and discharge of the series-connected lithium battery pack; when fully charged, it can ensure that the voltage difference between each single cell is less than the set value (generally ±20mV), achieving even charging of each single cell in the battery pack. , effectively improves the charging effect in series charging mode; simultaneously detects the overvoltage, undervoltage, overcurrent, short circuit, and overtemperature status of each single cell in the battery pack to protect and extend the service life of the battery; undervoltage protection enables each When a single battery is discharged, it can prevent the battery from being damaged due to over-discharge.
The finished lithium battery mainly consists of two parts, the lithium battery core and the protective plate. The lithium battery core is mainly composed of positive plate, separator, negative plate, and electrolyte; the positive plate, separator, and negative plate are wound or laminated, packaged, and filled with electrolyte , it is made into batteries after being packaged. Many people don’t know the function of the lithium battery protection plate. As the name suggests, it is used to protect the lithium battery. The function of the lithium battery protection plate is to protect the battery from being discharged, overcharged and overcharged. current, and there is output short circuit protection.
Working principle of lithium battery protection board
The reason why lithium battery (rechargeable type) needs protection is determined by its own characteristics. Since the material of the lithium battery itself determines that it cannot be overcharged, overdischarged, overcurrent, short-circuited, or charged and discharged at ultra-high temperatures, the lithium battery components will always appear with a delicate protective board and a current fuse.
The protection function of lithium batteries is usually completed by a protection circuit board and current devices such as pTC. The protection board is composed of electronic circuits and can accurately monitor the voltage and charge return circuit of the battery core at all times in an environment of -40°C to +85°C. Current, timely control the on and off of the current loop; pTC prevents severe damage to the battery in high temperature environments.
Ordinary lithium battery protection boards usually include control IC, MOS switches, resistors, capacitors and auxiliary devices FUSE, pTC, NTC, ID, memory, etc. Among them, the control IC controls the MOS switch to turn on when everything is normal, so that the battery core is connected to the external circuit. When the battery core voltage or loop current exceeds the specified value, it immediately controls the MOS switch to turn off to protect the battery core. Safety.
When the protection board is normal, Vdd is high level, Vss and VM are low level, DO and CO are high level. When any parameter of Vdd, Vss and VM changes, the level of DO or CO terminal will changes occur.
1. Overcharge detection voltage: Under normal conditions, Vdd gradually increases to the voltage between VDD and VSS when the CO terminal changes from high level to low level.
2. Overcharge release voltage: In the charging state, Vdd gradually decreases to the voltage between VDD and VSS when the CO terminal changes from low level to high level.
3. Over-discharge detection voltage: Under normal conditions, Vdd gradually decreases to the voltage between VDD-VSS when the DO terminal changes from high level to low level.
4. Over-discharge release voltage: In the over-discharge state, Vdd gradually rises to the voltage between VDD-VSS when the DO terminal changes from low level to high level.
5. Overcurrent 1 detection voltage: Under normal conditions, VM gradually rises to the voltage between VM and VSS when DO changes from high level to low level.
6. Overcurrent 2 detection voltage: Under normal conditions, VM rises from OV at a speed of more than 1ms and less than 4ms to the voltage between VM and VSS when the DO terminal changes from high level to low level.
7. Load short circuit detection voltage: Under normal conditions, VM starts from OV and rises to the voltage between VM and VSS when the DO terminal changes from high level to low level at a speed of more than 1μS and less than 50μS.
8. Charger detection voltage: In the over-discharge state, VM gradually drops from OV to the voltage between VM and VSS when DO changes from low level to high level.
9. Current consumption during normal operation: Under normal conditions, the current flowing to the VDD terminal (IDD) is the current consumption during normal operation.
10. Over-discharge current consumption: In the discharge state, the current (IDD) flowing through the VDD terminal is the over-discharge current consumption.
Lithium battery protection board wiring method
The third wire of some lithium-ion batteries is a temperature protection wire, and some are battery information verification wires (for example, if a non-original battery is replaced, an alarm will be prompted). Lithium-ion batteries are both batteries + protection boards. The 3 wires will only appear on the protection board, and the battery will always only have 2 wires. There are two types of lithium-ion batteries. Obviously the 3.7V one is non-aluminum iron phosphate and can be replaced directly.
Replacement is very simple (pay attention to the positive and negative poles):
1: Remove the packaging of the original battery, and then use a soldering iron to separate the protective plate and battery.
2: Similarly, remove the protective plate of your new battery and connect the battery to the old protective plate.
Read recommendations:
How to prevent energy storage safety?
What should I pay attention to when using robot lithium battery?
Last article:button cell battery cr2025.Technical limitations of lead-acid battery life design
Next article:1.5v Carbon battery.It depends on what kind of power battery is
Popular recommendation
AA rechargeable battery
2023-03-22602535 battery wholesaler
2023-03-22902030 battery Vendor
2023-03-22521133 lipo battery company
2023-03-22551521 battery manufacture
2023-03-22LR20
2022-07-01521133 160mAh 3.7V
2022-07-01Lithium Battery GN6020
2022-08-19LR03
2022-07-23503759 1200mAh 11.1V
2022-08-1918500 1000MAH 3.7V
2022-10-15802540 800mAh 3.7V
2022-08-19801752 720mAh 3.7V
2022-06-27Lithium-ion battery GN500
2022-08-2418650 4800MAH 3.7V
2022-07-29li ion 18650 battery pack
2023-06-253.7V Lithium Polymer Battery
2023-06-25CR3032 battery
2023-06-25703048 polymer battery
2023-06-2560v 80ah lifepo4 battery pack
2023-06-25Durability of Energy Storage Batteries
2025-03-27New method of lithium battery explanation lithium battery maintenance
2023-02-10Lithium battery external circuit
2023-02-01Polymer18650 rechargeable battery lithium 3.7v 3500mah. lithium batteries bring more possibilities f
2023-10-14Which Is Better for Tricycles: Lithium Ion Batteries or Lead Acid Batteries?
2025-02-14What are the reasons for the performance attenuation of lithium iron phosphate batteries in low temp
2023-03-28How to understand the drawbacks of materials used in the production of lithium iron phosphate batter
2023-09-08How to use lithium battery for the first time
2023-03-07How to choose high-quality lithium-ion batteries?
2022-11-07R03 Carbon battery.How to identify whether a 18650 lithium battery has a protective plate
2023-10-11