-(2)Analysis of specifications and dimensions of 18650 lithium-ion batteries

(2)Analysis of specifications and dimensions of 18650 lithium-ion batteries
author:enerbyte source:本站 click204 Release date: 2023-10-08 08:43:59
abstract:
Minimum discharge termination voltage - -2.75V Maximum charging termination voltage - -4.23V Maximum continuous charging current -1500mA Maximum continuous discharge current -3000mA Size (including heat shrink jacket)...

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Minimum discharge termination voltage - -2.75V

Maximum charging termination voltage - -4.23V

Maximum continuous charging current -1500mA

Maximum continuous discharge current -3000mA

Size (including heat shrink jacket)

Diameter: d - -18.0 ± 0.2mm

Height: h-65.0 ± 0.5mm

Minimum capacity - -2000mAh

Maximum capacity -3400mAh

Internal resistance (20 ℃± 5 ℃, measured after full charging) - - - less than 80mQ

Charging conditions 20 ℃± 5 ℃)

Standard charging -1000mA to 4.2V, 4.2V constant voltage to current less than 20mA

Fast charging -1500mA to 4.2V, 4.2V constant voltage to current less than 20mA

Usage environment (proposed)

Storage - Temperature (15-35 ℃)

Relative humidity (45-75%)

Atmospheric pressure (86-106kPa)

Discharge -20 to 60 ℃

Standard charging -0 to 45 ℃

Relative humidity -<93%

Atmospheric pressure -86 to 106kPa

Standard detection environment (unless otherwise required)

Temperature -20 ℃± 5 ℃

Relative humidity -45 ± 20%

2. General chemical performance parameters (electrical performance) requirements for 18650 lithium-ion batteries

(1) Appearance and structure, visually free from breakage, scratches, deformation, stains, and electrolyte leakage.

(2) Standard detection strip: If there are no special requirements, the detection should be carried out under conditions of 20 ± 5 ℃ (temperature) and 65 ± 20% (humidity). The accuracy level of the ammeter and voltmeter used in detection is ≤ 0.5

(3) Standard charging

It refers to charging a single battery voltage of 4.2V at a current of 0.5ItmA in an environment of 20 ± 5 ℃ and 65 ± 5% RH, then switching to constant voltage 4.2V charging until the charging current is less than 20mA and stopping charging.

(4) Fast charging

It refers to charging at a constant current of 1500mA in an environment of 20 ± 5 ℃ and 65 ± 5% RH until the voltage of the single battery is 4.2V, and then switching to a constant voltage of 4.2V until the charging current is less than 20mA and stopping charging.

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