Weijiang Power manufactures عبوات أسطوانية ليثيوم-أيون مخصصةمصنوعة من خلايا 18650 و21700 للعدّات والدراجات والسكوتر والإلكترونيات المحمولة والإضاءة والأجهزة الطبية والصناعية. نوفر عبوات مجمّعة ومحمية BMS ومعتمدة — بتكوين وسعة وغلاف وموصلات مصممة لجهازك — بدل خلايا مكشوفة. تشرح الصفحة أيضًا خلية 18650 الأسطوانية القياسية.
Understanding the 18650 Cylindrical Cell
The 18650 is a widely used rechargeable lithium-ion cylindrical cell. Its name describes its dimensions: the first two digits give the 18 mm diameter, the next two the 65 mm length, and the final digit indicates a cylindrical form factor. A standard cell measures about 18 mm × 65 mm. Cells may be supplied with a button top or an integrated protection circuit, which can increase the length from about 65 mm to 70 mm or more, so the exact specification should always be confirmed against the device or pack design.
Custom Cylindrical Li-ion Packs
| المعامل |
Custom Options |
| Cells |
18650 / 21700 cylindrical cells in series × parallel configurations |
| Voltage & capacity |
Configured to the required voltage and runtime |
| Protection |
PCM/BMS with over-charge, over-discharge, over-current and short-circuit protection; NTC thermistor on request |
| Mechanical |
Welded nickel tabs, lead wires, connectors, shrink-wrap or custom housing |
| Certification |
UN38.3, IEC 62133, CE, RoHS, REACH and MSDS documentation for shipping |
Typical Applications
- Cordless power tools and garden equipment
- Electric bicycles, scooters and small mobility devices
- Portable electronics, flashlights, scanners and medical devices
- Lighting, backup power and small energy-storage systems
For applications that favour intrinsic safety, wide temperature tolerance and lower cost, compare our NiMH cells and packs؛ لحلول العبوات الجاهزة انظرعبوات بطاريات ليثيوم.
Frequently Asked Questions
Q1: Do you sell bare 18650 cells?Our focus is assembled, protected and certified cylindrical lithium-ion packs for OEM devices, rather than loose unprotected cells. We select and integrate the cells as part of the pack build.
Q2: What does 18650 mean?It denotes an 18 mm diameter, 65 mm long cylindrical lithium-ion cell; the final zero indicates the cylindrical form factor.
Q3: What is the difference between protected and unprotected cells?Protected cells include a small circuit that guards against over-charge, over-discharge and short circuits and may be slightly longer (around 70 mm); packs we build include appropriate BMS/PCM protection.
Q4: Can you match a specific voltage and capacity?Yes. Packs are configured in series and parallel from 18650/21700 cells to meet the voltage, capacity, current and runtime your device requires.
Q5: Which safety and shipping documents are provided?Packs are supplied with UN38.3, IEC 62133, CE, RoHS, REACH and MSDS documentation as required for international shipping.
Q6: What is the MOQ for a custom lithium pack?Custom packs are project-based with flexible MOQ; send your electrical and mechanical requirements for engineering review and a quotation within 24 hours.
