Specific guidelines for the NMC cell voltage

Table of Contents

NMC Battery (Ternary Lithium Battery), but the indispensable battery supply electrons in daily life. Especially when motorcycles and electric bicycles are becoming more and more popular, most of them choose ternary lithium batteries. For the ternary lithium battery, we all need to know more information. Let’s take a look at the specific introduction of NMC cell voltage.

What is the nominal NMC cell voltage

The nominal voltage of the ternary lithium battery is 3.6-3.7V, which is the standard voltage of the minimum standard work. It also sets the voltage of the factory.

The best storage voltage of NMC cell

The best NMC cell voltage is 3.7 ~ 3.8V. Lithium ions are relatively stable under such circumstances, and storage is the most damaged battery under the condition of fully charging. There is a self-discharge phenomenon of lithium ion power batteries. Long -term storage will cause the battery to discharge and destroy the internal structure of the battery and reduce the battery life.

Therefore, the long -stored lithium -ion power battery should be replenished every 3 to 6 months, that is, the charging to the NMC cell voltage is 3.8 to 3.9 volts (the best storage voltage of the lithium battery is about 3.85 volt).

The median voltage of the ternary lithium battery

The median voltage is the corresponding voltage value when the capacity of the ternary lithium battery is half the capacity. For very obvious materials, such as NMC Battery, the median NMC cell voltage is basically the average NMC cell voltage.

The average voltage is the effective area of the voltage-capacity curve except for the capacity. The calculation formula is ü = ∫U (t)*i (t) DT/∫i (t) DT. In the charging and discharge data test, the energy data is divided by the capacity of charging or discharge energy refers to the average voltage.


What is the cut-off voltage of the ternary lithium battery

The deadline is the minimum NMC cell voltage allowed by the battery to discharge, and the maximum NMC cell voltage allowed when charging lithium batteries.

If the NMC cell voltage continues to discharge after the discharge cut off voltage, the potential of the positive electrode of the lithium battery will continue to decrease, and the negative electrode potential will gradually rise, forming excessive discharge.

Excessive discharge may cause damage to the electrode activity material, lose the ability to respond, and shorten the life of the lithium battery; it will also cause the negative copper foil to decompose and precipitate it in the positive pole. There is a general risk of short circuit.

If the charging power is higher than the charging cuttering voltage, the electromotive power of the orthopedic pole of the ternary lithium battery will continue to rise, causing the positive pole material to excessively remove the lithium, the crystal structure will damage the failure, and the lithium battery electrolyte decompositions loss. The negative electrode potential will continue to decline, excessive lithium, graphite layer -shaped tiles, and polar tablet lithium analysis and many other problems.


NMC cell voltage during the discharge process

During the entire discharge process, the NMC cell voltage curve can be divided into 3 stages:

1) At the initial stage of the battery, the voltage at the initial stage drops rapidly. The greater the discharge multiplier, the faster the NMC cell voltage decreases.

2) NMC cell voltage entered a slow change stage. During this time, it is called the platform area of the battery. The smaller the discharge multiplier, the longer the platform area lasts, the higher the platform voltage, and the slower the decrease in NMC cell voltage.

3) When the battery battery is close, the battery load voltage begins sharply until the discharge cutter voltage is reached.

Why NMC cell voltage can’t break through the 4.2V?

NMC Cell Voltage is determined by the electrode potential. Lithium Ion’s electrode potential is about 3V, Lithium Ion Battery Voltage has changed with different materials. For example, the rated voltage of the NMC Battery Cell is 3.7V and the full electric voltage is 4.2V.

The rated voltage of potassium iron phosphate batteries is 3.2V, and the full electromoton voltage is 3.65V. In other words, the potential difference between the positive and negative poles of the NMC Battery Cel can be more than 4.2V, this is the need for material and use safety

What is the difference between NMC cell voltage 3.7 V and 3.6 V?

The specific voltage is different due to the different formula. The difference between the 3.7 volt of the lithium battery and the 3.6 volt of lithium batteries is that the output voltage of the 3.7 volt battery is 0.1 volts higher than 3.6 volts. As long as these two batteries are the same as the wiring position in actual use.

How to increase NMC cell voltage

The way to add NMC cell voltage can be achieved by connecting in series. In our lives, many equipment batteries are obtained by NMC Cells. If you want a 48V battery, through the required voltage 48V / single battery voltage 3.6 or3.7V ≈ 12.97 or 13.3, you need to get at least 13 or 14 NMC Cells in the 48V battery.Why does nmc battery voltage drop to zero?

Why does NMC cell voltage become zero and processing methods

1) The battery suffers from short -circuit or over -loading, anti -charging (battery positive and negative electrodes); whether the electrical circuit is normal; whether there are traces of scorching the welding battery.

2) The battery is continuously charged with a high rate of large charging current, causing the battery movement to expand, and the internal positive and negative electrodes directly contact the short circuit.


1) Understand the specific use of the customer’s battery;

2) Use the battery to charge the same model and connect to the electrical appliances to determine whether the electrical appliance is normal;

3) Charging the battery at a 1C current for 30 minutes and the opening of the road for about 10 minutes. If the opening voltage of the battery is stable in the normal voltage range of the battery, the battery can basically return to normal. If the battery has been damaged, the voltage cannot be restored. If this phenomenon does not appear if the battery is not used, the 1C charging voltage cannot be restored, and professional and technical personnel need to be further analyzed.
4) It is recommended that customers choose batteries or integrated circuits with protective electronic components or integrated circuits with insurance tube, temperature switch.

TYCORUN ENERGY motorcycle NMC cell voltage pack

Tycorun Energy’s Lithium Motorcycle Battery is combined with 3.6-3.7V NMC Cells. The characteristics of high density, light weight, and high loop of NMC Cells are used as power batteries in the transportation. Therefore Quality NMC Battery Pack is used in electric motorcycles and motorcycles. There are 48V, 60V, 72V lightweight motorcycle battery.

TYCORUN 72v ebike battery swappable 50ah for motorcycle battery swap station
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