26650 lithium ion battery capacity sorting preferred method

2022/04/02

  Author :Iflowpower – Portable Power Station Supplier

26650 Lithium Battery Overview 26650 type, that is, a battery having a battery having a diameter of 26 mm, a length of 65 mm, a cylindrical type. Generally used for screaming lithium batteries, including lithium primary batteries and lithium ion batteries. Common useful nickel-wateng manganese positive materials, lithium batteries made of lithium iron phosphate materials - INR26650-3.

6V-4500MAH, IFR26650-3.2V-3200MAH. 26650 lithium battery performance cycle performance: 2000 times (1C charge / 1C discharge, capacity retention ratio ≥80%, 100% DOD) maximum continuous discharge current: 9.

6A Pulse discharge current: 15A, 5S Operating temperature: Charging: 0 ° C ~ 55 ° C; Discharge: -20 ° C ~ 60 ° C storage temperature: -20 ° C ~ 45 ° C battery weight: 86g (about) nickel-manganese ternary lithium ion 26650 single nominal voltage general: 3.6 V Nominal capacity: 4500mAh (capacity range 4500-4650mAH) AC internal resistance: ≤30mΩ (plus PTC type) charging conditions: cutoff voltage 4.2 ± 0.

05V, cutoff current 0.01c. (Remarks: Charging at 0.

5C constant current to 4.01C charging to current falls to 0.01C deadlines: 2.

75V cycle performance: 500 times (1C charging / 1C discharge, capacity retention ratio ≥70%, 100 % DOD) maximum continuous discharge current: 13A Pulse discharge current: 15A, 5S Operating temperature: Charging: 0 ° C ~ 55 ° C; Discharge: -20 ° C ~ 60 ° C Storage temperature: -20 ° C ~ 45 ° C Battery weight: 92g (about) diameter: 26.2mm Height: 65.6mm26650 Lithium battery safety performance test 1.

After the overter chargeable battery standard is charged, the initial state of the battery is measured, and when the battery is normal, charging it to 10.0V. Then the turntable press charging is terminated until the current is 0.

01c. Observe the appearance of the battery. RESULTS: Do not afford the fire, not exploding 2, after the over-place performance battery standard is charged, the battery initial state is measured, and when the battery status is normal, discharged to 0V at 0.

5c. Observe the appearance of the battery. RESULTS: Do not afford the fire, not exploding 3, after the external short-circuit battery standard is charged, the initial state of the battery is measured, and the positive and negative poles are directly shorted in the explosion-proof cover (the total electrical resistance is not more than 50mΩ), when the battery temperature dropped to the peak temperature The test ends at a low approximately 10 ° C.

Observe the temperature and appearance of the battery. RESULTS: No fire, not exploded 4, thermal abuse measuring the initial state of the battery, the battery standard is charged, placed in the oven, and the rate of temperature is raised to 130 ± 2 ° C in the rate of (5 ± 2 ° C) / min and holding for 30 min. Observe the appearance of the battery.

RESULTS: Do not afford the fire, not exploding 5, the initial capacity of the battery, the standard is charged, the initial state of the battery is measured, and the test battery is vertical from the high (lowest point height) of 1m, and the horizontal direction is free to fall into the cement floor. Dropping 2 times. RESULTS: Do not afford the fire, not exploding 6, the heavy material is placed in the middle of the full-electric battery; the weight of 10 kg is then freely fall from 1.

0m to the upper portion of the battery. RESULTS: Do not afford the fire, not exploded 7, extrusion testing cells are placed between the two extruded surfaces of the extruded equipment, and the cylindrical core shaft is parallel to the extrusion surface, gradually increase the pressure to 13 kN, and hold the pressure for 1 min. RESULTS: Best 26650 lithium battery capacity sorting method 6650 lithium battery capacity sorting method 6650 lithium battery capacity sorting method is the most authoritative, general battery manufacturer is sorted by battery capacity when shipping 26650 lithium batteries, each battery manufacturer The selection method is also the five paintings, and now investigates a plurality of cylindrical 26650 battery sorting processes, summarizing the best battery sorting methods as follows: 1) The upper cabinet is put on hold 2 min to terminate the voltage, the voltage is <2.

5V, directly down the cabinet C is scrapped. 2) 0.5c (1500mA) constant current discharge, voltage limit 2.

0V, time limit 150min; 3) stand for 10 min; 4) 0.1c (300mA) constant current discharge, voltage limit 2.0V, time limit 60min; 5) 2min; 6) 0.

5C constant current charging, voltage limit 3.65V, time limit 150min; 7) 3.65V constant voltage charging, current cutoff: 0.

05c (150mA), time limit 90min; 8) stand 2 min; 9) 0.5c Constant current discharge, voltage limit 2.0V, time limit 150min; 10) Static 10min; 11) 0.

1c constant current discharge, voltage limit 2.0V, time limit 60min; 12) Align 2 min; 13) 0.5C constant current charging, Voltage limit 3.

65V, time limit 60min; China's battery industry strongly recommends that the 26650 lithium battery capacity sorting process needs to be mastered is as follows: Remarks: 0.5c = 0.5 * Nominal capacity 0.

1c = 0.1 * Nominal capacity 0.05c = 0.

05 * Nominal capacity (in this class) (step 2 step 4) is the residual capacity of the battery, (Step 9 Step 11) is the actual capacity. Self-discharge test method = 2 * (nominal capacity * 0.5- Remaining capacity) / ((Step 9 Step 11) * After the last month is over, the actual capacity and self-discharge of the battery are given.

. After the step is over 12 hours, the circuit voltage and the internal resistance are fully detected and the voltage internal resistance is given. Sakhes Data Processing Remove Step 9, 0.

5c (1500mAh) Constant Current Discharge 3.2V Platform Capacity Data, Capacity Demand Data Use of Capacity / Step 9 "= 40%, for example: Step 9, 0.5c (1500mAh) Constant current discharge 3.

2V platform capacity = 1800mAh, step 9 capacity = 3200mAh, calculation method: 1800/3200 = 56%, that is, a qualified battery, such as less than 40%, ie, the unqualified battery core requires The component capacity is grouped (120PCS), the grouping requirements: 0.5c 0.1C capacity ≥ 3000mAh voltage ≥ 3.

290V internal resistance ≤ 30 millio, monthly self-discharge ≤10%. The capacity is 30mAh, the internal resistance ± 2mΩ, the voltage ± 2mV, the self-discharge tolerance is ± 1%. Self-discharge, internal resistance and heavy inspection capacity unqualified battery, according to standard documentation.

The original batch and the re-examination date cannot be paid to the library standard. The battery capacity is affected by temperature. The temperature of less than 22 degrees Celsius requires calculation of temperature compensation.

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