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:2024-02-27 Hits: Popular:AG11 battery
1. Voltage detection function of single cell
When the battery is in use and stored, the protection IC needs to detect the voltage of each single cell in real time.
2. Overcurrent detection function of battery pack
During the use of the battery, the voltage drop on the external switch tube is judged to determine whether the current charging and discharging current of the battery pack exceeds the set maximum current value. The protection IC then determines whether to turn off the battery protection circuit switch to cut off the output. . If the charging and discharging current of the battery pack is in an overcurrent state at this time, after turning off the switch tube, it is necessary to use the detection circuit to determine whether the external load has been removed. When the external load has an impedance of 300 kiloohms or higher, then connect the Turn on the switch.
3. Overcharge protection function
Lithium-ion batteries are sensitive to charging voltage. When the charging voltage is higher than a certain value, the battery itself may be in danger of exploding. The value of this value depends on the internal materials of the battery. This value of a single battery cell is generally set between 4.15V and 4.35V. After discovering an overcharged battery, the protection IC should immediately turn off the output switch tube. This delay time can be determined by an external capacitor to ensure the accuracy of voltage sampling. After overcharging occurs, the voltage detection module detects that the cell voltage drops to 4V or lower, and then turns on the switch to ensure that the voltage detection of the internal module has a comparator with a hysteresis.
4. Over-discharge protection function
Lithium-ion batteries have certain requirements for discharge voltage. When the discharge voltage of the cell is lower than a certain value, the cell itself may be damaged beyond recovery. The value of this value depends on the internal materials of the battery. This value of a single battery cell is generally set between 2.3V and 3.0V. After discovering an over-discharged battery, the protection IC should immediately turn off the output switch tube. This delay time can be determined by an external capacitor to ensure the accuracy of voltage sampling. After over-discharge occurs, the voltage detection module detects that the cell voltage rises to 3V or higher, and then turns on the switch to ensure that there is a comparator with hysteresis in the internal module.
5. Protect the low power consumption function of the IC
The protection IC should keep power consumption as low as possible. It is best to keep the power consumption around 100uA, not too high. When the battery voltage is generally the highest, the power consumption of the protection IC is the largest.
Extended functions that a 10-cell battery protection IC should have:
6. Protect the automatic balancing function of the IC
It is best for the protection IC to have a built-in balancing circuit of about 10mA. When a cell is overcharged, the balancing circuit can automatically determine the cell voltage difference of the battery pack under normal circumstances, and use the balancing circuit to control the battery voltage at a certain level. within the difference range.
7.Protect the programmable functions of the IC
Because the open circuit voltage of batteries of different types and materials corresponds to different typical SOC values, a rewritable FLASHROM can be integrated inside the protection IC, and the user can input different battery curve parameters according to different battery models.
8. Protect the actual power display function of the IC
The actual power display function can be set according to the relationship between the open circuit voltage of the lithium-ion battery recorded in the internal RAM and the SOC. The general four-level power display is 20% power, 50% power, 80% power, and more than 95% power. Level four.
Generally speaking, the first five functions are common functions that are common to all popular lithium-ion battery protection ICs on the market. The last three functions are already available in some lithium-ion battery protection ICs on the market. 1 or 2 types, but a protection IC that fully possesses these functions has not yet been seen, and the price is generally on the high side.
On the basis of the above five basic functions, the last three functions can be expanded to make the protection line truly intelligent.
Note: The rated operating current of lithium-ion battery packs used in bicycle batteries is generally 10 amps, and the peak current may reach 20 amps.
The two available NMOS models are as follows:
IRF1010ES
NBD7052L
Both NMOSs have strong overcurrent capabilities and retain sufficient margin.
Read recommendations:
Lithium battery core technology
Last article:LR1130 battery.Introduction to Nanotechnology Batteries
Next article:lithium 3400mah 3.7v 18650 battery.UPS battery maintenance status and solutions
Popular recommendation
energy storage battery for solar system sales
2023-05-10602248 polymer battery company
2023-03-2232700 battery Manufacturing
2023-03-22Nickel Hydride No. 5 battery
2023-03-22521133 battery company
2023-03-22R03P
2022-07-01Rack-mounted energy storage battery GN-192V 100Ah
2022-09-27Rack-mounted energy storage battery GN-48600-l
2022-09-27551235 180mAh 3.7V
2022-07-01Coin Battery CR 1216
2022-09-276LR61
2022-12-07602030 300MAH 3.7V
2023-06-1018650 8000mAh 11.1V
2022-09-30701224 145mAh 3.7V
2022-07-01775767 3500mAh 7.4V
2022-08-199v alkaline battery
2023-06-25AAA NiMH batteries direct sales
2023-08-04AA Carbon battery
2023-06-254LR44 battery
2023-06-255/AA USB 1.5V 2035mWh
2022-06-27Waterproof Rating of Waterproof Lithium Batteries
2024-10-14401030 battery.Lithium ion batteries
2023-10-24What are the characteristics of custom lithium batteries.lifepo13 battery for solar energy storage w
2023-04-10Power battery manufacturers explain the correct use of high Lithium battery of electric vehicles.LR4
2023-06-16How does lithium polymer battery perform under extreme temperature conditions?
2024-09-10Lithium iron phosphate batteries are subject to temperature.18650 battery 4800mah
2023-08-22Lithium power battery characteristics.401030 battery
2023-05-27Recycling process for lithium iron phosphate batteries after disassembly.CR927 battery
2023-08-21Brief introduction of lithium battery protection principle.industrial energy storage battery
2023-03-25The battery shows the problem of power loss after welding.CR2430 battery
2023-06-07