[Grade A, Brand New Quality] EVE original grade A, brand new MB31 cells, with intact QR, ready for assembly into high-voltage systems.
[Real Capacity 330Ah] Nomial capacity 314Ah, actual capacity 330Ah, higher energy density, compact size.
[Free Accessories] Provide all necessary accessories for DIY batteries, including screws, busbars, epoxy plates and studs(Already welded at the electrode).
[Already Matched] All cells have consistent voltage, internal resistance, and capacity, allowing for direct assembly without the need for balancing.
[Original Test Report] With the original test report, all battery cell test data is traceable, capacity range 330.0011-332.9999Ah, internal resistance range 0.1702–0.1836 mΩ, voltage range 3.2650-3.2678V
[8000 Cycles] At 25 ℃, 10%-90% humidity, the battery is subjected to a pressure of 300 kgf and a charge and discharge power of 0.5P. After 8000 cycles, the actual remaining capacity is greater than 70% (SOH ≥ 70%).
[Quality and safety certification] MB31 cells have passed UL1642, UL1973, UL9540A, IEC62619, UN38.3 and other quality and safety certifications.
Description
xWistek EVE MB31 Lifepo4 Cells Reviews - @Easypowerwall
Supply Original EVE Grade A, Brand New Prismatic LiFePO4 Cell
MB31 3.2V 314Ah prismatic cell, lifepo4 material, no fire, no explosion, real capacity 330Ah (original factory report shows), 8000 cycle life (≥70% SOH), service life of more than 10 years.
Single M6 Stud
The battery cell has been welded with a single M6 stud(aftermarket), which is convenient for DIY battery. It is recommended to use a torque of less than 6N.m for assembly.
Grade A,brand new quality
The battery cells have the original test report, the QR code is intact, and all the battery cell test data can be tracked.(How to determine whether it is a Grade A battery?)
Free Accessories
The battery cell comes with the necessary accessories, busbars, screws and epoxy sheets to assemble the battery pack.The busbar is made of nickel-plated copper, which has low resistance, good conductivity, corrosion resistance, and generates little heat during operation.
Good packaging conditions
The battery cells are packed in cartons that meet the requirements of dangerous goods, with transparent tape wrapped around the outside to prevent rainwater from seeping into the cartons. Customized sponges are used to fix the cells, effectively protecting them from impact damage.
Wide Applications
Specification
x|
Model |
EVE MB31 |
|
Nominal Capacity |
314Ah(1004.8Wh) |
|
Norminal Voltage |
3.2V |
|
Number of Cycles |
≥8000cycles@70%SOH |
|
Charging Voltage |
4.2V |
|
Maxinum Charge Current |
157A |
|
Maxinum Discharge Current |
157A |
|
Temperature Range(discharge) |
-30°C~66°C |
|
Connection Screw |
Single M6 |
|
Warranty |
5 years |
|
Weight |
5.6KG |
|
Dimensions(W*T*H) |
173*72*208mm |
FAQ
x● Is the battery cell of brand new A-grade quality?
Yes
● How do I distinguish between Grade A and Grade B batteries?
1. Verify that the QR code is original and not reprinted.
2. Check for the original factory inspection report.
3. Determine the difference in voltage, internal resistance, and capacity between cells from the same batch as reported in the original factory inspection report.
● Do I need to balance the battery cells after receiving them?
No. We balance the battery cells before shipping, so you can assemble them directly.
● Why is the internal resistance I measured much higher than the one in the datasheet?
The internal resistance listed in the datasheet is the resistance without the studs soldered to the battery. Your measurement likely includes the resistance of the M6 studs, so your value is slightly higher.
Of course, the battery cell's internal resistance is also affected by the cell's charge level, humidity, and the test equipment.
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