18650 rechargeable battery lithium 3.7v 3500mah
CH
About Us
Company Profile Development History Sales Network Partner Social Responsibility
Products
Rechargeable Battery Battery Packs Energy Storage Battery Primary Battery Handicraft Article
Subsidiary Company
SINO TECHNOLOGY SUNBEAM GREEN POWER DATAPOWER SEONG-HEE STD
Honor
Qualification Certificate Patent Certificate Honor Certificate
R&D
R&D Center Test Center
News
Company News Industry News
Contact Us
18650 rechargeable battery lithium 3.7v 3500mah
18650 rechargeable battery lithium 3.7v 3500mah
Sino Technology Manufacturer Group co.,ltd Home  >  product  >  energy storage lithium battery  >  Rechargeable Battery
polymer lithium battery

Primary battery

Rechargeable Battery

LR03 alkaline battery

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

lithium 18650 li ion battery
lithium 18650 li ion battery
>
<
lithium 18650 li ion battery

lithium 18650 li ion battery

Model: 18650

Capacity: 1200mAh

Standard voltage: 3.7V

Size: 18*65mm

Product origin: China

Storage time: 5 years


Application:

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


Product description

Related Products

  18650 lithium-ion battery winding step process should pay attention to the problem

  Battery Information 18650 Lithium battery winding step process to pay attention to 1. Humidity control ≤ 1%RH Purpose: To prevent positive and negative electrode sheets from absorbing water during the winding process, resulting in zero voltage, self-discharge, and poor cycle performance; method: Calculate the dew point value and temperature value to get the temperature and humidity value; 2. Dust control ≤100,00

  18650 lithium-ion battery winding step process should pay attention to the problem

  1. Humidity control ≤1%RH Purpose: To prevent positive and negative electrode sheets from absorbing water during the winding process, resulting in zero voltage, self-discharge, and poor cycle performance;

  Method: Calculate the dew point value and temperature value to obtain the temperature and humidity value;

  2. Dust control ≤100,000pc/ft3 (detection particle size is 0.5um)

  Low temperature lithium iron phosphate battery 3.2V 20A -20℃ charge, -40℃ 3C discharge capacity ≥70%

  Charging temperature: -20~45℃ -Discharging temperature: -40~+55℃ -40℃ supports maximum discharge rate: 3C -40℃ 3C discharge capacity retention rate≥70%

  Click for details

  Purpose: To prevent dust from being involved in the electrode group during winding, causing short circuit, overheating, fire, self-discharge and other defects in the battery cell;

  Method: use a dust tester;

  3. Abnormal cutting burrs

  Process requirements: pole piece ≤ 8um; tab burr ≤ 12um; detection method: randomly select 1PCS cell for dissection in the first inspection of each machine in each shift, and detect the front and rear ends of the positive and negative electrodes and the positive and negative electrodes according to the "burr detection operation guide" Ear clipping burrs.

  Adverse effects: The burrs on the pole pieces or tabs exceed the process requirements, which may cause the burrs to pierce the diaphragm, short-circuit the positive and negative electrodes, overheat the battery cells, and may explode in severe cases, posing serious safety hazards.

  Low temperature high energy density 18650 3350mAh-40℃ 0.5C discharge capacity ≥60%

  Charging temperature: 0~45℃ Discharging temperature: -40~+55℃ Specific energy: 240Wh/kg -40℃ discharge capacity retention rate: 0.5C discharge capacity≥60%

  Click for details

  4. Poor coverage of positive and negative electrodes

  Process requirements: the alignment of positive and negative plates is 0.75~.55mm

  Negative plate and diaphragm alignment 1?.5mm

  Detection method: continuous random inspection of 3PCS cells after reel change, detection of alignment according to the "X-RAY Operation Instructions" Adverse effects: 1) The alignment of positive and negative electrodes exceeds the process specification, which may cause the negative electrode to not cover the positive electrode During the charging process, the lithium ions released from the positive electrode cannot find the corresponding graphite to embed, resulting in free lithium ions in the battery cell accumulating on the negative electrode and forming dendrites. The dendrites penetrate the separator and cause an internal short circuit, which poses a safety hazard.

  2) If the alignment between the negative electrode and the diaphragm exceeds the process standard, the negative electrode may be squeezed and deformed, and the negative material on the electrode may fall off. During the charging process, the battery cell expands, and the powder penetrates the diaphragm, causing the internal short circuit of the positive and negative electrodes to cause safety. Hidden danger;

  5. Poor coverage of the pole piece in the winding direction (the length of the outer layer negative electrode exceeds the length of the positive electrode material, and the length of the inner layer negative electrode exceeds the length of the positive electrode material) detection method: every 2H each winding machine randomly checks the dissection of 3PCS batteries, and measures the two parts with eyepieces and rulers respectively. A coverage gap size.

  Adverse effects: It may cause the negative electrode sheet not to enclose the positive electrode sheet. During the charging process of the battery, the lithium ions released from the positive electrode cannot find the corresponding graphite to embed, causing free lithium ions in the battery cell to accumulate on the negative electrode and appear dendrites. Dendrites puncture the separator and cause internal short circuit, which poses a safety hazard.

  6. Short circuit test

  Parameter setting (100V, 25nF250V,

  250uA) Detection method: test the machine with a short-circuit sample during the first inspection of each shift; adverse effects: self-discharge, heat, explosion and other short-circuit factors: cutting particles, metal dust, burrs, etc. cause diaphragm holes;

  7. Tab sticking foil and tension

  Process requirements: tensile force ≥ 15N sticky foil area 2/3 welding printing

  Detection method: Sampling 1PCS cell every 2H, dissecting, measuring tension, checking foil sticking

  Bad effect: high internal resistance

2600_02.jpg

2600_03.jpg

2600_04.jpg

2600_05.jpg

2600_06.jpg

2600_07.jpg

2600_08.jpg

2600_09.jpg

2600_10.jpg

2600_11.jpg


AAA Ni-MH battery price AAA Ni-MH battery price

AAA Ni-MH battery price

GREEN POWER

lithium battery 18650 wholesaler lithium battery 18650 wholesaler

lithium battery 18650 wholesaler

GREEN POWER

702535 lipo battery company 702535 lipo battery company

702535 lipo battery company

STD

18500 battery Manufacturing 18500 battery Manufacturing

18500 battery Manufacturing

SUNBEAM

601248 polymer battery 601248 polymer battery

601248 polymer battery

STD

401030 battery direct sales 401030 battery direct sales

401030 battery direct sales

STD

26650 battery wholesale 26650 battery wholesale

26650 battery wholesale

SUNBEAM

402427 battery Manufacturing 402427 battery Manufacturing

402427 battery Manufacturing

GREEN POWER

703048 polymer battery company 703048 polymer battery company

703048 polymer battery company

STD

NiMH battery packs manufacture NiMH battery packs manufacture

NiMH battery packs manufacture

GREEN POWER

902030 polymer battery company 902030 polymer battery company

902030 polymer battery company

GREEN POWER

home solar energy storage lithium battery home solar energy storage lithium battery

home solar energy storage lithium battery

GREEN POWER
Back to Previous Category Access to Factory
360° FACTORY VR TOUR
lithium ion battery 18650 priceWhatsapp
lithium ion battery 18650 price

lithium ion battery 18650 priceTel
+86 19925278095

lithium ion battery 18650 priceEmail
admin@sino-techgroup.com

TOP