1. Введение: What Is an 18650 2000Литий-ионный аккумулятор мАч?
The 18650 2000mAh lithium-ion battery cell is a rechargeable cylindrical battery designed for compatible electronic devices and battery pack applications. With a nominal voltage of 3.7V and a rated capacity of 2000mAh, it provides 7.4Wh of rated energy in a compact cylindrical format.
The 18650 format is widely used in rechargeable battery pack designs because of its standardized dimensions and convenient integration into multi-cell configurations.
Для производителей аккумуляторов, дистрибьюторы, и производители оборудования, selecting a suitable 18650 cell requires evaluating more than capacity alone. Напряжение, зарядный ток, ток разряда, внутренний импеданс, рабочая температура, and physical dimensions all need to match the target application.
2. Key Specifications of the 18650 2000мАч аккумулятор
Understanding the technical specifications is essential when selecting a lithium-ion cell for battery pack development.
The main specifications of this cell include:
| Параметр | Спецификация |
|---|---|
| Формат ячейки | 18650 Цилиндрический |
| Химия батареи | Литий-ионный |
| Номинальное напряжение | 3.7В |
| Номинальная мощность | 2000мАч |
| Номинальная энергия | 7.4Чт |
| Стандартное зарядное напряжение | 4.2В |
| Recommended Charging Current | 400мА |
| Максимальный зарядный ток | 1000мА |
| Максимальный ток разряда | 1000мА |
| Внутренний импеданс | ≤30 мОм |
| Приблизительный вес | 43г |
| Диаметр | 18.2 ± 0.3mm |
| Flat-top Height | 65.0 ± 0.5mm |
| Button-top Height | 67.3 ± 0.5mm |
These specifications provide a reference for engineers and purchasing teams when evaluating compatibility with battery management systems, charging circuits, and battery pack structures.
3. Why Choose a 2000mAh 18650 Литий-ионный элемент?
3.1 Standard 3.7V Nominal Voltage
The 3.7V nominal voltage makes this cell suitable for battery designs developed around conventional rechargeable lithium-ion configurations.
Battery pack designers can connect multiple compatible cells in series and parallel to achieve the required voltage and capacity. The final configuration should be determined by the equipment’s electrical requirements and an appropriate battery management system.
3.2 Компактный цилиндрический дизайн
The 18650 cylindrical format provides a compact form factor for battery pack assembly.
Its specified diameter and height help engineers evaluate cell spacing, holder compatibility, enclosure dimensions, and overall battery pack layout.
3.3 7.4Wh Rated Energy
With a nominal voltage of 3.7V and capacity of 2000mAh, the rated energy is 7.4Wh.
This provides a useful reference for estimating the energy capacity of compatible battery pack configurations.
3.4 Defined Charging and Discharging Parameters
The cell has a recommended charging current of 400mA and a maximum charging current of 1000mA. Its specified maximum discharge current is also 1000mA.
Following the manufacturer’s charging and discharging limits is important for battery performance and safe system design.
4. Charging and Discharging Considerations
Proper charging and discharging conditions are essential for rechargeable lithium-ion batteries.
For this 18650 2000mAh cell, the manufacturer’s specification provides the following charging parameters:
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Стандартное зарядное напряжение: 4.2В
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Рекомендуемый зарядный ток: 400мА
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Максимальный зарядный ток: 1000мА
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Температура зарядки: 0от °С до 45 °С
The specified maximum discharge current is 1000mA, and the operating discharge temperature range is -10°C to 60°C.
Battery pack manufacturers should select compatible charging circuits and protection systems based on the final application.
The discharge cut-off voltage should also be confirmed with the manufacturer before finalizing the battery pack design, because different sections of the supplied specification contain different end-of-discharge references.
5. Operating Temperature and Cycle Life
Temperature conditions influence the performance and service life of lithium-ion battery cells.
According to the supplied product specification, the operating temperature ranges are:
| Operation | Temperature Range |
|---|---|
| Зарядка | 0от °С до 45 °С |
| Разгрузка | -10от °С до 60 °С |
| Хранилище | -10от °С до 45 °С |
The specification also states a cycle life of at least 300 cycles under its defined 1C charge/discharge test method to 80% емкость.
It is important to understand that cycle life depends on testing conditions, including charging and discharging current, температура, пределы напряжения, and operating environment. Actual results in a finished battery pack may differ.
6. Применение 18650 2000mAh Lithium-Ion Battery Cells
18650 lithium-ion cells can be considered for different battery pack projects, provided the electrical characteristics and safety requirements are compatible.
Потенциальные области применения включают в себя:
Производство аккумуляторных батарей
Battery pack manufacturers can evaluate 18650 cells for customized rechargeable battery assemblies. Cell quantity and series-parallel configuration depend on the required voltage and capacity.
Портативное электронное оборудование
The compact cylindrical format may be suitable for compatible portable electronic products that require rechargeable lithium-ion power.
Industrial Electronic Equipment
Equipment manufacturers can assess this cell for devices with matching voltage, текущий, емкость, and environmental requirements.
Customized OEM/ODM Battery Projects
Для проектов OEM и ODM, buyers can discuss cell selection, конфигурация пакета, размеры, electrical requirements, and production quantities with their battery supplier.
Примечание: These are potential application categories, not a claim that the cell has been approved or certified for every application listed.
7. What Should Buyers Consider When Sourcing 18650 Батарейные элементы?
Для B2B-покупателей, selecting the right battery cell involves evaluating technical suitability and supplier reliability.
Consider the following factors before placing an order:
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Стабильность емкости: Confirm the rated capacity and capacity testing method.
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Voltage compatibility: Check the cell’s nominal and charging voltage against the intended system.
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Текущие требования: Ensure charging and discharging limits meet the application.
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Физические размеры: Confirm diameter, высота, and terminal type.
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Internal impedance: Review the manufacturer’s specified impedance.
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Рабочая температура: Check the actual operating environment.
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Документация по качеству: Request available test reports and product specifications.
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Sample evaluation: Test samples before confirming mass production.
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Battery pack compatibility: Verify the BMS, схема защиты, и конфигурация упаковки.
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Supply cooperation: Обсудить количество заказа, delivery requirements, and long-term sourcing needs.
A professional supplier should be able to provide clear technical information and communicate with buyers about their project requirements.
8. Часто задаваемые вопросы
1 квартал: What is the nominal voltage of this 18650 аккумуляторная батарея?
The nominal voltage is 3.7V.
2 квартал: What is its rated capacity?
The rated capacity is 2000mAh.
Q3: How much energy does it provide?
Its rated energy is 7.4Wh.
Q4: Какое стандартное напряжение зарядки??
The standard charging voltage is 4.2V.
Q5: What is the recommended charging current?
The recommended charging current is 400mA.
Q6: What is the maximum charging current?
The specified maximum charging current is 1000mA.
Q7: Какой максимальный ток разряда?
The specified maximum discharge current is 1000mA.
Q8: What are the cell dimensions?
The diameter is 18.2 ± 0.3mm. The flat-top height is 65.0 ± 0.5mm, while the button-top height is 67.3 ± 0.5mm.
Q9: What is the operating temperature range?
Диапазон температур зарядки составляет от 0°C до 45°C., and the discharging temperature range is -10°C to 60°C.
Вопрос 10: Можно ли использовать этот элемент для индивидуальных аккумуляторных блоков??
It can be evaluated for compatible battery pack projects. The final configuration should be based on the equipment’s electrical and mechanical requirements.
9. Заключение: Выбор права 18650 Battery Cell for Your Project
The 18650 2000mAh 3.7V rechargeable lithium-ion battery cell offers a compact cylindrical format, 7.4Wh rated energy, and clearly defined charging and discharging parameters.
Для производителей аккумуляторов, дистрибьюторы, и производители оборудования, it can be considered for compatible battery pack projects where its capacity, текущие ограничения, размеры, and operating temperature meet the design requirements.
Before starting mass production, buyers should confirm the technical specifications, evaluate samples, and verify compatibility with the complete battery system.
Looking for a reliable 18650 поставщик литий-ионных аккумуляторов?
Contact our team to discuss your required quantity, приложение, конфигурация аккумуляторной батареи, образец требований, and OEM/ODM project details.