A Grade 3.7V 50Ah NMC Polymer Battery Cells for Electric Vehicles

2025-02-22 05:56

Sự chỉ rõ

Mẫu pin	NMC-50NP
loại pin	Prismatic NMC rechargeable battery
Định mức điện áp	3.7V
Sức chứa giả định	50Ah
Sạc điện áp	4,2V
Xả điện áp cắt	2,75V
Phí tối đa hiện tại	1C
Dòng xả tối đa	3C
Kháng cự bên trong	≤0.8mΩ
Nhiệt độ sạc	0-45 ℃
Nhiệt độ xả	-20 ~ 55 ℃
Nhiệt độ bảo quản	-20~35℃
Chu kỳ cuộc sống	≥2000 Times
Kích thước pin	11*100*300mm
Trọng lượng pin	0.74kg
Sự bảo đảm	2 năm

Test Procedure and its Standard

	Mục	Test method	Tiêu chuẩn
1	Xuất hiện	Visual	No Defects and Leakage
2	Kích thước	Caliper for dimension	As item 4
3	Cân nặng	Balance	As item 3.3
4	Shipment voltage	Voltmeter	3.50~3.6V  25%~35%SOC
5	Initial Internal Impedance	Measure the AC impedance at 1kHz	≤2.3mΩ (25%~35%SOC)
6	Discharge Capacity	Follow standard discharge after standard charge, at 25±2℃	*≥20Ah
7	Cycle Life (25±2℃, With splint ,Rest for 30 min between each cycle.)	Charge: 0.3C CC charge to 4.20V, 4.20V CV charge to 0.05C cut-off; Discharge: 0.5C CC discharge to 3.0V	≥70%Initial capacity @800 cycles
8	Leakage Test	The battery which is fully charged shall be stored at 60±2℃ and 85±5% RH for 7 days.	No Leakage.
9	H/L Temp. Characteristic (Hold for 5h@55℃ or 20h@-20℃ after full charging)	Charge: 0.3C CC charge to 4.20V, 4.20V CV charge to 0.05C cut-off at 25±2℃ Discharge: 0.2C CC discharge to 2.2V at -20±2℃; 0.2C CC discharge to 2.75V at 55±2℃.	Discharge capacity rate: *≥70%Initial Capacity -20±2℃ *≥90%Initial Capacity 55±2℃.

Safety Criteria for Acceptance

Mục	State	Test method	Tiêu chuẩn
External Short	Fully Charged	Battery terminals are short-circuited with a resistance of less than 100mΩ for 10minutes. Observe 1 hour. Tests are to be conducted at room temperature.	NO EXPLOSION AND NO FIRE.
Over-Discharge	Fully Charged	1C CC discharge for 90minutes after standard charge，Observe 1 hour.	NO EXPLOSION NO FIRE AND
Heating	Fully Charged	Put the battery into an oven at RT, and increase the temperature at a rating of 5℃/min to 130±2℃, after the oven temperature reached to 130℃±2℃, maintain for 30 minutes at that temperature before the test is discontinued.，Observe 1 hour.	NO EXPLOSION AND NO FIRE.
Crush	Fully Charged	Crush between two flat plates. Applied force is about 13kN, Observe 30min.	NO EXPLOSION AND NO FIRE.
Overcharge	Fully Charged	0.33C CC Charge the battery to 1.1 times of the max charge voltage or continue to charge for 1 hour after charge the battery to the 115%soc, Observe 1 hour.	NO EXPLOSION AND NO FIRE.
Temperature Cycling	Fully Charged	Reducing the chamber temperature to -40℃ within 60 minutes and maintaining this temperature for 90 minutes, Raising the chamber temperature to 25 ℃ within 60 minutes, Raising the chamber temperature to 85℃ within 90 minutes and maintaining this temperature for 110 minutes, Reducing the chamber temperature to 25℃ within 70 minutes. Repeating the sequence for a further 4 cycles, Observe 1 hour	NO EXPLOSION AND NO FIRE.

Câu hỏi thường gặp

Q: Which model should I choose? 

A: Tell us your demands for cells, including capacity, voltage, charge and discharge rate, application areas, etc. We will recommend you the most suitable cell model.

Q: How do I guarantee product quality?

A: We develop raw material to produce cell , We control well in cell production process, we test performance of batteries before shipping, and provide good after-sale service.

Q: What should I do if I find something wrong with batteries?

A: Describe your problems to us, we will quickly response to that and provide solutions as soon as possible.

Q: What about price? Can I get lower price for my order?

A: It depends on your quantities, the more order you place, the more discount you will get.

Q: Why I get different quotation for the same product during different time of the year?

A: The price of our cells will be adjusted if the price of raw materials changes. We　have to do so in order to transfer cost pressure.

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