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[China]
Address: Room 910, HeFaTouZi Building, QingQuan North Road, 2528 Block，YuCui Industrial Area, LongHua District,518053 Shenzhen China.
Contact name:Sales Manager
Shenzhen Herculesi Technology Co., Ltd. |
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Rechargeable 3.7V 37Ah Lithium Ion Polymer Lipo Pouch Battery Cell
Important Note Regarding LiNMC Battery Care
All lithium-ion cells are “deep cycle” meaning that they have the ability to be fully charged and discharged. The life of the battery will significantly increase if the depth of each discharge is limited to 80% of the rated capacity.
| Specifications | lithium ion pouch cell 3.7V 37Ah |
| Nominal voltage | 3.7V |
| Nominal capacity | 37Ah |
| Standard charge current | 0.5C |
| Fast charge current | 3C |
| Max charge full voltage | 4.2V |
| Internal resistance | ≤7mΩ |
| Charge temperature | 0～40℃ |
| Discharge temperature | -20～50℃ |
| Storage temperature | -20～45℃ |
| Size | Customized |
Comparing LiFePO4 to LiNMC
In spite of the various chemical variations, lithium-ion batteries can generally be separated into two groups: lithium iron phosphate (LFP, LiFePO4) and metal oxides (NMC, NCA, Cobalt, Manganese).
Comparing LiNMC to Lead Acid
Table 2 provides a brief comparison of lead acid to LiNMC on a pack level. It should be noted that both chemistries have a wide range of parameter values, so this table is only a simplified representation of a very complex comparison.
Battery Technology Comparison
| lead acid | Vrla lead acid | NMC | |
| Energy Density (Wh/L) | 80 | 100 | 250 |
| Specific Energy (Wh/kg) | 30 | 40 | 256 |
| Regular Maintenance | Yes | No | No |
| Cycle Life | 1200@50%DOD | 1000@50%DOD | 1900@80%DOD |
| Typical state of charge window | 50% | 50% | 80% |
| Temperature sensitivity | Degrades significantly above 25°C | Degrades significantly above 25°C | Degrades significantly above 45°C |
| Efficiency | 100% @20-hr rate 80% @4-hr rate 60% @1-hr rate | 100% @20-hr rate 80% @4-hr rate 60% @1-hr rate | 100% @20-hr rate 99% @4-hr rate 92% @1-hr rate |
| oltage increments | 2V | 2V | 3.7V |
Pictures
Applications
Usage
Lithium cells and batteries are designed for use as rechargeable and reusable power source. Can be used as a substitute for other types of rechargeable cells and batteries.
Possible dangers
Risk of short circuit and the subsequent fire
Charged and uncharged cells contain large amount of electricity, which can cause a short-circuit in the electrical spark or arc. The battery itself is not combustible, but from incandescent contacts may ignite other combustible materials.
Risk of injury by DC
When connecting more cells and batteries in series increases the risk of injury DC. In any case, do not touch electrical wires or other components under voltage.
Risk of chemicals
Lithium cells and batteries contain no caustics and acids. However contain chemical substances, that act on the human body. For this reason, in the handling of cells and batteries must observe the following rules:
Eye protection: protect your eyes with goggles against the ingress of chemicals in the eye.
Skin protection: wear protective clothing and gloves. Avoid skin contact with chemicals.
Protection against inhalation: Operate with batteries only in well-ventilated areas. In enclosed spaces it is necessary to provide forced air ventilation.
