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

Other information

Home  >  Other information

Lithium battery charging and discharging life.3.7 volt 18650 lithium battery

release time:2023-09-23 Hits:     Popular:AG11 battery

  





  The cycling life test conditions and requirements for lithium batteries specified in the national standard: Charge at 1C under an ambient temperature of 20 ℃± 5 ℃. When the battery terminal voltage reaches the charging limit voltage of 4.2V, switch to constant voltage charging until the charging current is less than or equal to 1/20C. Stop charging, let it stand for 0.5h~1h, and then discharge at 1C current to the termination voltage of 2.75V. After discharge, let it stand for 0.5h~1h before proceeding to the next charging and discharging cycle, If the discharge time is less than 36 minutes for two consecutive times, the service life is considered to have ended, and the number of cycles must be greater than 300

  Interpretation of national standard regulations:

  A. This definition stipulates that the testing of cycle life is conducted in a deep charging and discharging manner

  B. The cycle life of lithium batteries is specified according to this mode, and after ≥ 300 cycles, the capacity still exceeds 60%

  However, the number of cycles obtained by different cycle systems is completely different. For example, the other conditions mentioned above remain unchanged, and only changing the 4.2V constant voltage to 4.1V constant voltage is used to test the cycle life of the same type of battery. This way, the battery is no longer a deep charging method, and the final test results show that the cycle life can be increased by nearly 60%. So if the cutoff voltage is raised to 3.9V for testing, the number of cycles should be increased several times.

  Regarding the statement that one cycle of charging and discharging reduces the lifespan of a lithium battery, we should note that the definition of the charging cycle of a lithium battery is: a charging cycle refers to the process of all the battery's charge from full to empty, and then from empty to full. And this is not equivalent to charging once. In addition, when discussing the number of cycles, we cannot ignore the conditions of the cycle. Setting aside the rules and discussing the number of cycles is meaningless because the number of cycles is a means of detecting battery life, not the purpose!

  three

  ▲ Misunderstanding: Many people like to use their mobile phone lithium-ion batteries for automatic shutdown and recharging, which is completely unnecessary.

  In fact, it is impossible for users to use the battery according to the national standard testing mode. No mobile phone will shut down at 2.75V, and its discharge mode is not high current constant current discharge, but a mixture of GSM pulse discharge and normal low current discharge.

  There is another method of measuring cycle life, which is time. Some experts suggest that the lifespan of general civilian lithium-ion batteries is 2-3 years. Based on actual situations, such as the termination of lifespan at 60% capacity and the aging effect of lithium-ion batteries, I think it is more reasonable to use time to express the cycle lifespan.


Read recommendations:

Rack-mounted energy storage battery GN-10240

Lithium battery R&D

New method of lithium battery explanation lithium battery maintenance

3.2v lifepo4 battery cell

li ion 18650 battery pack manufacture

Last article:How to improve battery energy density?18650 battery 3.7v 6000mah

Next article:Measures to solve battery reverse connection.18650 li ion rechargeable battery

Popular recommendation

18650 battery 3500mah

2023-03-22

18650 lithium rechargeable battery

2023-03-22

Nickel Hydride Batteries price

2023-03-22

AAA NiMH batteries direct sales

2023-03-22

802540 battery manufacture

2023-03-22

Ni-MH AAA400mAh 1.2V

2022-07-01

803040 1000mAh 3.7V

2022-08-19

801752 720MAH 3.7V

2023-06-10

L1022 10A

2022-10-09

Cabinet type energy storage battery 25KWH

2022-11-08

Street light energy storage battery GN-1260-NCM

2022-09-27

LR6

2022-12-07

Coin Battery LR 936

2022-10-15

Lithium Battery GN12-400

2022-08-19

Lithium-ion battery GN500

2022-07-29

27A battery

2023-06-25

18650 battery pack Product

2023-06-25

button cell battery cr2025

2023-06-25

NiMH No. 7

2023-08-04

18650 lithium ion battery cell

2023-06-25

CR2450 battery

2024-09-26

Lithium phosphate iron and lithium battery principle.Column rechargeable battery

2023-07-19

Polymer18650 rechargeable battery lithium 3.7v 3500mah. lithium batteries bring more possibilities f

2023-10-14

Lithium battery external circuit

2023-02-01

Fuel cell vehicles

2024-06-18

History of Nuclear fusion lithium battery technology.902030 polymer battery

2023-07-20

Development prospects of rechargeable batteries.solar energy storage lithium ion battery 15kwh 48v

2023-10-07

Introduction: Explanation of the reasons for bulges in robot lithium battery customization.L1022 bat

2023-08-18

What is the energy density of lithium iron phosphate batteries?mobile energy storage battery

2023-03-28

Novelty of Lithium iron phosphate battery.solar energy storage lithium ion battery 15kwh 48v 100ah

2023-10-07
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