Lithium ion battery pack
Lithium ion battery pack consists of a battery management system and multiple lithium ion cells connected in series or parallel to output different voltages and capacities. Lithium ion battery packs can be tailor-made in size, capacity, voltage, enclosure, and connectors for different applications, such as solar lights, UPS, industrial equipment, and electronic devices.
All the cells in the battery pack lithium ion should be strictly matched in voltage, capacity, internal resistance, and self-discharge rate, which is normally sorted by our automatic cell group machine to ensure cell consistency. Any cell difference will cause lots of problems in uneven charging and discharging, reduced pack lifespan, overheating and safety risks, capacity loss, and BMS stress.
Choose the BMS with cell balance function to minimize the cell gap after hundreds of cycles! It can not only extend the lifespan of the rechargeable lithium ion battery pack, but also reduce capacity loss.
Choose the lithium ion battery pack charger with a zero-voltage charge function, which can avoid the charging problem when the BMS is cut off with zero voltage output.
① 11.1v lithium ion battery
11.1V lithium ion battery consists of three single lithium ion battery cells in series(3S), with an 11.1V output and a 12.6V fully charged voltage. Featuring 11.1V perfect output, the 11.1v lithium battery pack can not only provide a stable and reliable power supply for robotics, portable electronics, and UPS, but also ensure maximum energy.
By assembling different cylindrical cells of 18500,18650 and 21700, lithium ion battery 11.1V(3S) can be customized to different sizes and capacities, optimizing the maximum energy output.
② 12v lithium ion battery
12v lithium ion battery pack is divided into two configuration types. One is the 11.1V(3S) lithium ion battery made of three lithium ion cells in series, and another is the 12.8V(4S) lithium iron phosphate (LiFePO4) battery made of four lithium iron phosphate (LiFePO4) cells in series.
Energy density and cycle life are the key factors to choose the right types of 12V lithium ion battery. 11.1V(3S) lithium ion battery has a higher energy density to reach more power in a compact size.. 12.8V(4S) Lifepo4 battery is intrinsically safe in chemistry and ultra-long 6000+ cycles.
11.1V(3S) lithium ion battery is widely used in consumer electronics, such as laptops, power banks,
robotics, power tools, etc.12.8V(4S) Lifepo4 battery is commonly installed in solar energy storage,RVs&Marine,Golf Carts and Backup Power(UPS).
③ 14.4v Lithium Ion Battery Pack
14.4V lithium ion battery pack is made of four single lithium ion cells in series(4S), with a 14.8V nominal voltage and a 16.8V fully charged voltage. Thus,14.4V lithium battery is also nominated as 14.8V lithium battery pack. Featuring a popular 14.4V output voltage, the 14.4V lithium ion batteries are ideal for power tool devices, such as drilling and driving screws, impact wrenching, circular sawing, and lighting. Meanwhile, high drain current capability enables the strong burst power for the machine operation.
④ 18v Lithium Ion Battery
18v lithium ion battery pack is made of five single lithium ion cells in series(5S), with an 18V nominal voltage and a 21V fully charged voltage. Besides the normal BMS protection against overcharge,over-discharge, overcurrent, and short-circuits, the 5S BMS should have functions of cell balancing and thermal monitoring to maintain capacity and prevent operation in extreme conditions.18v Lithium Ion Battery is widely used in cordless tools, outdoor power equipment, vacuums, lighting, and automotive tools.
⑤ 24v lithium ion battery pack
24v lithium ion battery pack is divided into two configuration types. One is the 25.2V(7S) lithium ion battery made of seven lithium ion cells in series, and another is the 25.6V(8S) lithium iron phosphate (LiFePO4) battery made of eight lithium iron phosphate (LiFePO4) cells in series.
Featuring compact size and high energy density, 25.2V(7S) lithium-ion battery packs are widely used in industrial equipment, robotics, drones, e-scooters, and e-bikes.
Featuring ultra-long cycle life and intrinsic safety, 25.6V(8S) LiFePO4 battery packs are widely used in solar lighting, solar energy storage and industrial system.
⑥ 36v lithium ion battery pack
36v lithium ion battery pack is divided into two configuration types. One is the 36V(10S) lithium ion battery made of ten lithium ion cells in series, and another is the 38.4V(12S) lithium iron phosphate (LiFePO4) battery made of eight lithium iron phosphate (LiFePO4) cells in series.
36V lithium ion batteries are widely used in hoverboards, marine, golf carts, solar energy storage, and e-bikes.VTCBATT can specifically design the connector type, physical dimensions, and discharge current to satisfy your power demand.
⑦ 48v lithium ion battery pack
48v lithium ion battery pack is configured by 13S lithium-ion cells or 16S lithium iron phosphate cells. Featuring higher voltage, more power and efficiency, 48v lithium ion battery pack is very popular in energy storage systems, electric vehicles,golf carts, UPS, and utility vehicles.
Considering intrinsic safety and high capacity per cell, 16s 48V lithium iron phosphate battery packs are more commonly used than 13S 48V lithium-ion batteries. Choose the 48V lithium ion battery charger and motor that exactly match the 48V battery voltage, instead of 36V or 72V voltage.
⑧ 72v lithium ion battery pack
72v lithium ion battery pack is configured by 20S lithium-ion cells or 24S lithium iron phosphate cells. The BMS used in 72v lithium ion battery pack should be three multiple protections against over-voltage,under-voltage,over-current, short-circuit, and temperature protection, including cell balancing and warning.
The 72V lithium battery packs are more commonly used in high-speed electric motorcycles,electric cars,golf carts, e-cargo bikes,industrial equipment and marine applications.
A: No. Lithium ion batteries must be carried in carry-on luggage only. airline approves the carriage of power above 100Wh. 2 batteries of 100Wh- 160Wh are allowed by the airline.
A: Professional engineers with solid electrical knowledge are allowed to build a lithium ion battery pack. First, you need to define the device power requirements. Second, you need to choose the cell chemistry and type. Third, you need to select cells and only pack the same model cells in the same voltage, capacity, and resistance together. Fourth, calculate the configuration of the voltage and capacity you need. Five, assemble the BMS into the battery pack. Six, wiring the BMS, each cell, and do insulating to make a safe connection. Seven, use a multimeter to test whether the battery pack voltage is correct and normal. Test the load gradually. Eight, use shrink and epoxy board to protect and wrap the battery pack as protective clothing.
A: Use only a specific charger to charge the lithium ion battery pack in room temperature.The charger must match with the battery pack voltage and capacity.
Use only Nikon-approved chargers or high-quality third-party alternatives.
A:Only professional electricals are allowed to fix lithium ion battery pack. Always wear safety gloves and work in a fire-safe area. Never solder directly to cells.Don’t open or modify the original packs.
| Symptom | Possible Cause |
| Battery won’t charge | Faulty charger, BMS trip, broken wire, dead cells |
| Battery dies quickly | Cell imbalance, aging cells, high self-discharge |
| Battery gets hot | Internal short, overloading, poor connections |
| No power output | Tripped BMS, blown fuse, open circuit |
| One cell swollen | Internal failure — dangerous! |
A:Find you need to find the failure reason.
Possibility 1: Mostly it is the failed BMS,if the pack has voltage show,but no output,you just need to replace with another same BMS.
Possibility 2: If it is due to poor wiring or connections, use high-quality manufacturing cable and terminals.
Possibility 3: If it is due to dead or swollen cells, replace the faulty cells with the same voltage, capacity, and models as the original ones.
A: Place the battery pack in safe places and dial to DC voltage in the correct voltage range.
Use the red probe and black probe to connect to + and – correctly.
Then the display will show the voltage, resistance.
A:We do lithium ion batteries group by an automatic machine.The cells should be in great consistency. Our group standards tolerance are 10mv,5mAh,1mΩ.
A:It’s highly professional process to design lithium ion battery pack. First, you need to define the voltage,size and capacity you need. Second , choose the correct cell chemistry and model to match your requirement. Third, choose the correct BMS based on the current and voltage to calculate the total battery pack size.
