What is 48v lithium battery?

What is 48V Lithium Battery?

In daily life, 48V lithium battery is involved in many applications, such as the commonly used  home battery energy storage systems, telecommunication batteries, data center backup power supply, etc. So how much do you know about 48V lithium batteries?We have specially integrated and analyzed some information about the 48V lithium battery, and below, we will take you to further understand the 48V lithium battery!

48v 200Ah Lifepo4 battery-1


Perfect Energy Storage

2 times battery life, reduce space by 50 percent, need no maintenance, and reduce charging time by 60 percent

Off-grid solar systems ha actually been around the world for a long time, and the first widely used system was 12V. At this time, many consumers will question, why our system is bigger than 24V? Because they are used as a 12V as a standard for RV and off-grid homes.

We agree that 12V is ideal, but this is only for small systems. For medium or large systems, it is wise for consumers to use 24V or 48V to achieve economical and more efficient settings.

The higher the voltage of the pack means it can support larger solar arrays.

48v 100ah lithium battery


What is a 48V lithium-ion battery?

People often buy a single battery, it is generally around 3.7v. But when the operating voltage range is slightly larger, the single battery has a defect about the insufficient voltage.At this time, the battery pack and the modular battery that increase the battery voltage will come immediately.Among the many high-voltage batteries, we often see 48v lithium-ion batteries.

Compared with lead-acid batteries, 48V lithium-ion batteries have many advantages.Among them, the more obvious is the small volume, light weight, strong temperature adaptability, high charge and discharge efficiency, safety and stability, long service life and energy saving and environmental protection.

48V lithium-ion batteries can be divided into a lot of content.If according to the cathode material can be divided into ternary lithium batteries, lithium iron phosphate batteries, lithium titanate batteries

96v battery lithium ion 100Ah-1500Ah


48V Li-ion Battery Price

The 48V lithium-ion battery is composed of multiple lithium cells combined in series and parallel, because if the 48v lithium battery is made of only a single cell, the battery efficiency and life are relatively poor.


48V lithium-ion battery price estimation formula

Single lithium battery cell price x (3.2 ~ 3.7V * n = 48v) * m (the number of cells in parallel) + protection plate price + shell price + auxiliary material price General single lithium cell voltage of 3.2 ~ 3.7V, its price will be different because of the manufacturer when the production of lithium battery production materials and process steps.


48V Lithium-ion Battery Protection Board

The 48V lithium-ion battery protection board, with another name, is the protective circuit board.Mainly composed of electronic circuits, it can accurately capture the cell voltage and charge and discharge circuit current in the-40℃ to + 85℃ environment, so as to control the connection and disconnection of the battery.Current circuit is timely.

48v 100ah lifepo4 battery-1

Li-ion battery protection board can as charging and discharging protection for series and parallel connected battery pack, and at the same time can detect the over-voltage, over-current, over-temperature, under-voltage and short-circuit status of each single battery in the battery pack to prolong the service life of the battery and elude the harm of the battery in virtue of over-discharge. Lithium battery protection board is an indispensable component of lithium battery.The most indispensable component of the lithium battery is the lithium battery protection board.


48V Lithium-ion Battery BMS

The 48V Li-ion battery management system (BMS) can capture the status of each individual cell in the Li-ion battery pack to determine the status of the entire Li-ion battery system, and then according to the overall state of the Li-ion battery system corresponding control adjustment and strategy, realize the Li-ion battery system and each battery charge and discharge management, the ultimate goal is to ensure the safe and stable operation of the Li-ion battery system.

24v 100ah Lifepo4 battery1


48V Lithium Battery BMS Features

  • Lithium-ion battery management system consists of voltage and temperature collection module, current collection module,management host (CPU) and communication interface module.
  • It can capture and display the total voltage, reserve power and total current of the lithium-ion battery pack; the voltage of any single cell and the temperature of the battery box; the highest and lowest temperature, the highest and lowest single cell voltage and cell number, and the charge and discharge amount of the battery pack.
  • The lithium-ion battery host also supply alarm and control output interface for over-voltage, under-voltage, high temperature, low temperature, over-current, short circuit and other limit conditions.
  • The RS232 and CAN bus interfaces are provided, and all the information on the lithium-ion battery management system can be read directly by the computer.

24v lifepo4 battery pack 100Ah-1600Ah-1


48V Li-ion Battery use Precautions

  1. If you don’t use lithium-ion batteries for a long time, you should keep the lithium-ion battery charged at 50-60%, replenish it every three months, and charge and discharge it every 6 months.
  2. Care should be taken not to let the lithium-ion battery get wet, squeeze and collide during transportation.This can damage the lithium-ion battery.
  3. Storage of lithium-ion batteries should not be less than 0 degrees Celsius. Lithium-ion batteries are best stored at 5 to 10 degrees Celsius.
  4. Prohibit use or place lithium-ion batteries at high temperatures (in high sunlight or very hot cars), which will cause less battery life.
  5. Prohibit storage in places with strong static electricity and strong magnetic fields, otherwise it is easy to destroy the battery safety protection device, bringing unsafe hidden danger.
  6. 6.If the lithium-ion battery is abnormal during use, storage or charging, immediately remove the battery from the device or charger and stop the use.
  7. For lithium-ion batteries, they could reduce electricity by 3 to 5 percent a month. Self-discharge is temperature dependent and will be higher as the temperature rises.
  8. Complete discharge is the “squeezing” of a battery until it no longer produces any current. Squeeze out any current. In this case, the voltage will drop to 0 V.If you stay in this state, the battery may stop using it and be out of control.
  9. Lithium-ion batteries can be used in the temperature range of 10°C to +55°C. However, charging can only be done at a battery temperature of +5°C to +45°C.


48V Lithium-ion Battery vs. Lead-acid Battery

Energy density by weight

In this era, lithium batteries have an absolute advantage in energy storage. Because the energy density of lithium battery generally reaches 200~260wh / g, while the energy density of lead-acid generally reaches 50~70wh / g.The weight and energy density of lithium batteries is 3 to 5 times that of lead-acid batteries, thus indicating that the capacity of lithium batteries at the same weight is 3 to 5 times stronger than that of lead-acid batteries.


Volume energy density

At the same capacity, lithium-ion batteries are about 30 percent smaller than lead-acid batteries.Because the volume energy density of lithium-ion batteries is usually about 1.5 times that of lead-acid batteries.


Service life

Lithium ternary materials and lithium iron are the most popular lithium battery materials. For example, ternary lithium batteries usually have 1000 cycles, lithium iron phosphate batteries have more than 2000 cycles, and lead-acid batteries usually have 300-350 cycles. Then it means that lithium-ion batteries can last many times longer than lead-acid batteries.


Price Cost

Lithium-ion batteries are about three times as expensive than lead-acid batteries.That means lead-acid batteries are currently cheaper than lithium-ion batteries. However, by lifetime analysis, lithium batteries have a longer lifetime if the same cost is used.


Environmental Protection

Lead-acid batteries are very polluted, while lithium batteries are more environmentally friendly in production and recycling than lead-acid batteries.

If I were to use a full powered 48V lithium-ion battery at home, how long would it last?

The range of a 48V Li-ion battery is related to the capacity of the battery itself (Ah) and the total power of the household appliances (W). Assuming you are using a 48V 200Ah solar home battery and the total power of the household appliances is 1800W, then the running time of your home is 48V*200Ah/1.8kW=5.3h.


How Many Hours Does It Take To Charge an 48V Lithium Battery to Full?

charging time and voltage does not have much to do with.

Mainly depends on the capacity of the lithium-ion battery and the power of the charger, charging time = lithium battery capacity ÷ charging current

For example, 48V 5kWh lithium-ion battery, assuming that the maximum charge current allowed is 50Ah, then the theoretical charging time of 4 hours, that is, 200Ah ÷ 50A = 4h, but the actual charging constant current to constant voltage mode, the trickle charge at the end takes longer, so under normal circumstances are in about 5 hours. Similarly, if the allowed charging current is 20Ah, it takes 200Ah ÷ 20A = 10h, but the same trickle time, so it is about 12 hours or so.



48V lithium ion battery charging can not charge in how to do?

  • Whether the solar panel output parameters are normal, voltage, current, etc.
  • hether the charger line is normal, whether the connector is disconnected
  • whether the 48V lithium battery is broken, you can check whether the open circuit voltage of the battery is normal.
  • Consult the lithium battery manufacturer.


48V 13 String and 14 String Difference

NCA only divided into 13 or 14 strings, lithium iron phosphate is 16 strings

But the NCA 13 string discharge platform is significantly lower than 48V, the speed is slow, 14 string good

13 string full voltage 13 * 4.2 = 54.6V, rated voltage 13 * 3.7 = 48.1V, as of voltage 13 * 3.2 = 41.6V

14 string full voltage 14*4.2=58.8V, rated voltage 14*3.7=51.8V, as of voltage 14*3.2 = 44.8V

13 series can be better compatible with lead-acid battery electric car, lead-acid battery electric car normal is 12*4= 48V, as of voltage 10.5*4 = 42V

People commonly refer to “iron phosphate” as LiFePO4 / LFP, the nominal voltage of each cell is 3.2V. This means that to make a 48V battery pack requires 16 LiFePO4 cells, 16 strings full voltage 16*3.2 = 51.2V, LiFePO4 is considered to be the most fireproof, and their LiFePO4 is that fire protection performance is the best, and they usually last twice as long as ordinary NCA/NCM 18650 battery packs.

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