Product Description
Heated Lithium Battery 7.4V 2s2p 4400mAh 18650 Rechargeable Li-ion Battery Pack
| Model | 2S2P |
| Nominal voltage | 7.4V |
| Nominal capacity | 4400mAh |
| Size | 22mm*69mm*87mm |
| Max charge current | 0.5C |
| Charging method | Constant current 1C to 8.4V,then charge with constant voltage 8.4V till charge current less than 0.01C |
| Max discharge current | 1C |
| Discharge cut-off voltage | 6V, the over-discharge detection voltage of PCM |
| Operating environment | Charging, 0°C ~ 45°C ; 65±20%RH; Discharging, -20°C~60°C ; 65±20%RH |
| Storage environment | -20°C~45°; 65±20%RH; |
| Lifespan (80% Prime Capacity) | >500times |
| Charging Attention | It is dangerous that charging with higher current or voltage than Product Specification may cause damage to the cell electrical, mechanical safety performance. |
Advantages:
Performance in Cold Environments
Enhanced Discharge Capacity: Heated Li - ion battery packs can maintain a better discharge capacity in cold temperatures. In cold weather, the performance of traditional Li - ion batteries can decline significantly. For example, at very low temperatures (such as - 20°C), the capacity of an ordinary Li - ion battery might reduce to less than 50% of its normal capacity. However, a heated Li - ion battery pack can keep its capacity at a much higher level, often around 80 - 90% of the normal capacity. This is because the heating element in the battery pack warms up the battery cells, allowing the electrochemical reactions to occur more efficiently.
Improved Voltage Stability: The voltage output of a heated Li - ion battery pack is more stable in cold conditions. When a traditional Li - ion battery gets cold, its voltage drops rapidly during discharge. In contrast, the heated battery pack can provide a more consistent voltage supply. This is crucial for applications such as electric vehicles, where a stable voltage is required to ensure the proper operation of motors and other electrical systems.
Safety and Longevity
Reduced Risk of Damage: Cold temperatures can cause damage to Li - ion batteries, such as lithium plating on the anode, which can lead to a decrease in battery life and even safety hazards like short - circuits and explosions. Heated Li - ion battery packs mitigate this risk by keeping the battery cells at an appropriate temperature. The heating system helps to prevent the formation of lithium plating and other cold - related damages, thus increasing the safety of the battery pack.
Extended Battery Life: By operating within a more suitable temperature range, the heated Li - ion battery pack can have a longer lifespan. The consistent temperature provided by the heating element slows down the degradation process of the battery. For example, in applications like outdoor power equipment or remote - sensing devices that are frequently exposed to cold environments, using a heated battery pack can significantly extend the number of charge - discharge cycles the battery can endure.
Versatility and Adaptability
Wider Range of Applications: Heated Li - ion battery packs are more versatile and can be used in a broader range of environments. They are suitable for outdoor applications such as in winter sports equipment (like electric snowmobiles or heated ski vests), cold - storage logistics devices (such as pallet trucks in refrigerated warehouses), and remote - area power supplies (in polar regions). These battery packs enable the reliable operation of equipment in cold climates where traditional Li - ion batteries would struggle.
Adaptive to Temperature Fluctuations: The heating system in these battery packs can be designed to adapt to different temperature conditions. Some advanced heated battery packs have temperature - sensing and control mechanisms. They can automatically adjust the heating intensity according to the ambient temperature. For example, in a situation where the temperature varies between - 10°C and - 5°C, the battery pack can adjust the heating level to maintain an optimal operating temperature for the battery cells.
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