18650 rechargeable battery lithium 3.7v 3500mah
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18650 rechargeable battery lithium 3.7v 3500mah
18650 rechargeable battery lithium 3.7v 3500mah
Sino Technology Manufacturer Group co.,ltd Home  >  product  >  polymer lithium battery
polymer lithium battery

Primary battery

Rechargeable Battery

LR03 alkaline battery

Sino Technology Manufacturer Group co.,ltd
Sino Technology Manufacturer Group co.,ltd

3.7V 18650 lifepo4 battery
3.7V 18650 lifepo4 battery
3.7V 18650 lifepo4 battery
3.7V 18650 lifepo4 battery
3.7V 18650 lifepo4 battery
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3.7V 18650 lifepo4 battery

3.7V 18650 lifepo4 battery

Model: 18650

Capacity: 2600mAh

Discharge rate: Continuous 3C, Instantaneous 5C

Pole ear: Monopole ear with PTC

Internal resistance: <60mΩ

Minimum capacity: 2550mAh

Discharge cut-off voltage: 3.6V

Cell weight: 45g


Application:

Ebike, scooters, solar panel, power storage, flashlight, power tools, medical equipment, motorcycle, digital products etc.


Product description

Related Products

  Briefly describe the production process of 18650 lithium-ion battery pack

  (1) Baking

  Bake for 12 hours under the condition of constant temperature and vacuum degree of -0.09MPa. The main purpose is to dry the moisture of the battery cell.

  (2) Injection

  Inject the battery cell after vacuum baking into the electrolyte solution in the glove box filled with Ar gas. The amount of liquid injection is different according to the design of the lithium-ion battery pack. Use this to judge whether the injection volume is appropriate or not.

  (3) Welding tabs Weld the positive tab (aluminum strip) and the negative tab (nickel strip) to the scraper positions of the positive and negative tabs with an ultrasonic welding machine. Pay attention to prevent welding deviation, welding dislocation, and false welding.

  (4) Bottom welding. First put the insulating gasket into the steel shell, then put the wound battery core into the steel shell, and weld the negative tab to the bottom of the steel shell with a spot welder. Check the outer surface of the bottom of the steel shell, pick out yellow spots, black spots, defects, fires and other poor appearances, and try to pull the tabs, pick out 18650 lithium-ion battery packs that are not firmly spot welded, such as fires, weak welding, and desoldering.

  (5) sealing

  First spot weld the steel shell and cap of the 18650 lithium-ion battery pack with a spot welder, and then continue laser welding with a laser welder. Laser welding should ensure accurate positioning, and the welded parts are clean. It is strictly forbidden to cause deformation or damage to the battery. Check after welding, and repair welding for defective batteries such as welding holes and explosions.

  (6) Winding

  Put the ion-exchange membrane on the winding needle evenly, and the front end protrudes 2-5mm from the winding needle. There should be no wrinkles at the four corners of the pole piece. If the adhesive tape is misaligned left and right, the adhesive tape does not cover the solder joints and other defects, the positive electrode material must hug the negative electrode material, the electrode sheet cannot be rolled, and the front end of the electrode sheet must be inserted to the top.

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