Factory Direct Wholesale 3.7v 21700 Lithium Battery for Electronic Bike, Electronic Scooter
Product Description
Li-ion/LiFePO4 Rechargeable Battery
Shape: Single, Pack, Sticked
Nominal voltage:3.7V
Rated capacity: 4000mAh, 4500mAh,4800mAh
5000mAh, 6000mAh
(optional or customised)
Design: Flat and pointed
Package: PVC layer, Silkprint label, OEM Label, Carton box
Product Paramete
|
Model |
3.7V
4000mAh |
3.7V
4500mAh |
3.7V
4800mAh |
3.7V
5000mAh |
3.7V
6000mAh |
|
Voltage |
3.7V |
|
Capacity |
4000mAh |
4500mAh |
4800mAh |
5000mAh |
6000mAh |
|
Rated power |
14.8Wh |
16.65Wh |
17.76Wh |
18.5Wh |
22.2Wh |
|
Cycle times |
500-1000 |
|
Recharging current |
0.5c-1c |
|
Discharge current |
0.2c-2c |
|
Maximum discharge current |
4c |
|
Operating temperature |
Charge: 0-45°C; Discharge:-20-60°C. |
|
Net weight |
65g-75g |
70g-80g |
75g-85g |
80g-90g |
90g-100g |
|
Dimensions(mm) |
Diameter is about 21 mm, height is about 70 mm |
Cylindrical Cell Structure
•Cathode: The main cathode materials are LiCoO2, LiMn2O4 or (LiFePO4). The material of the positive electrode determines the voltage and performance of the battery.
•Anode: The anode material is mainly graphite or silicon.
•Electrolyte: Electrolyte is the conductive medium between the positive and negative electrodes, usually a liquid or gel.
•Casing: The casing of the battery cell is a metal cylinder, usually made of aluminum or steel, used to protect the internal structure of the battery, provide mechanical support, and prevent the impact of the external environment on the battery.
•Seal: The sealing part of the battery cell is located on the top of the casing and is used to seal the battery and prevent electrolyte leakage.
•Electrolyte selection: Choosing an electrolyte that is stable and has high thermal stability is an important step in ensuring battery safety.
•
•Materials and Structural Design: Appropriate materials and structures provide adequate mechanical support, protection, and isolation to prevent physical damage to the battery.
•
•Overcharge and over-discharge protection: Battery management systems (BMS) often contain overcharge and over-discharge protection circuits to prevent batteries from being exposed to inappropriate current or voltage when charging and discharging. This helps prevent the battery from overheating and damage.
•
•Thermal Management: Thermal stability is a key factor in battery safety. Heat generation within batteries is part of normal operation, but effective thermal management systems are required to ensure temperature control under a wide range of conditions.
•
•Safety valves and seals: Cylindrical cells often have safety valves and sealing systems designed to prevent electrolyte leakage.
•
•Production Quality Control: Strict manufacturing standards and quality inspection procedures help reduce manufacturing defects and improve quality.
Application Area
Lithium-ion batteries are in every corner of our lives, and their applications include mobile phones, tablets, laptops, smart watches, mobile power supplies (charging banks), emergency power supplies, shavers, electric bicycles, electric cars, electric buses, sightseeing vehicles, drones, and other types of power tools
Packing and Shipping
Company Profile
Production Process
Exhibition
Our Advantages
1.Our company is a high-tech enterprise with 21 years of battery experience and advanced production equipment, with 500,000 + production capacity and 20+ technical engineers, ISO9001 quality management system.
2.Our products are Grade A quality new battery cells, and support T/T,Western Union, PayPal,LC,D/P and other payment methods.
3.We can customized battery size,protective board,offer Customized power supply scheme and diversified battery cell selection for you.
4.12 months warranty period, to provide you with good after-sales service.
Certifications
FAQ
Q1: Are your factory or trading company?
A1: We are professional battery manufacturer with our own factory and brand. We provide all kinds of OEM/ODM services for clients, can produce by your samples or technical drawings. We can build the molds and fixtures.
Q2 : Do you accept OEM/ODM?
A2: Accept, send us your requirement/draft ,we will produce battery according to your requirement/draft.
Q3.Can I have a sample order?
A3: Yes, we welcome sample order to test and check quality.
Q4: What's your payment and delivery terms?
A4: Payment terms: By T/T, 30% for deposit, and 70% balance before shipment. PayPal for small amount.
Q5: What company will be used for making the shipments? DHL? UPS or others?
A5: Via DHL,UPS and FedEx.
Q6: What is delivery time if we place an order?
A6: It's depends on the order quantities. Usually, small quantity within 7-9 working days. 30-35 days for bulk order.
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