diy battery
mb31 314ah 3.2v cells dimension and weight
4pcs 314ah cells,4pcs epoxy plate one white background
314ah cells have a better fit and battery accessories
314Ah lifepo4 battery parameters
diy battery spot welder
diy battery
mb31 314ah 3.2v cells dimension and weight
4pcs 314ah cells,4pcs epoxy plate one white background
314ah cells have a better fit and battery accessories
314Ah lifepo4 battery parameters
16 Grade A EVE MB31 Cells with DIY LiFePO4 Battery Box|Wistek(USA Stock)
diy battery spot welder
Wistek

16 Grade A EVE MB31 Cells with DIY LiFePO4 Battery Box|Wistek(USA Stock)

SKU: DIY4815-1-R
Availability: In Stock
Product Type: DIY Battery Kits

[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] Nominal 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 other accessories.

[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%).

[Pre-assembled Version] The BMS is already installed on the battery box. During assembly, simply install the cells in order according to the signal lines and tighten the screws on the battery box again.

[16S 200A BMS] The battery box includes a JK V19 PB2A16S20P BMS, a touchscreen display, 2A active current balancing, and a continuous output of 200A.

Choose Product: 16 MB31 Cells+1 Diy Box
$1,804.00
$3,550.00
$1,804.00
Subtotal: $1,804.00
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Local Express Delivery

The package will be sent out within 24 hours and delivered to your door within 3-7 working days.

Free Returns

7-day no-questions-asked return.

5 Years Warranty

24/7 online technical support
Description
Description
x

EVE MB31 cells will be shipped from our Los Angeles warehouse in the US, with a shipping time of 3-7 working days.

DIY battery boxes will be shipped from China, with a shipping time of 25-30 working days.

 

Wistek EVE MB31 Lifepo4 Cells Reviews - @Easypowerwall

Supply Original EVE Grade A, Brand New Prismatic LiFePO4 Cell

EVE MB31 Battery

Single M6 Stud

The battery cell has been welded with a single M6 stud, which is convenient for DIY battery. It is recommended to use a torque of less than 6N.m for assembly.

MB31 lifepo4 battery

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.

EVE MB31 Grade A

Free Accessories

The battery cell comes with the necessary accessories, busbars, screws and epoxy sheets to assemble the battery pack.

MB31 Packaging

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.

MB31 3.2V 314Ah
MB31 cells container shipment

15kWh Battery Box


Wide Applications

mb31 cells applications
Specification
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
MB31 314Ah 3.2V Cell Datasheet
V1 15kWh Battery Box Listing
V1 15kWh DIY Battery Box Installation Guide
FAQ
FAQ
x
FAQ Section Example
●Advantages of Prismatic LiFePO4 Batteries?
1. Larger monomer capacity.
2. Higher stability.
3. Higher security.
4. Higher space utilization.
5. Lighter weight.
●What is the series and parallel connection of batteries?
Both are how the battery is connected and is something you have to learn when assembling the battery.

Series connection: Connecting the positive pole of one battery to the negative pole of another battery increases the voltage of the battery pack, but the capacity remains the same.

Parallel connection: Connecting the positive pole of one battery to the positive pole of another battery increases the capacity of the battery pack, but the voltage remains the same.
●Are LiFePO4 batteries safe?
There is no doubt that LiFePO4 batteries are one of the safest lithium-ion batteries out there. Due to its chemical properties and safe internal structure, LiFePO4 batteries will not explode even if they are severely damaged (such as puncture/strong knocks).
●Can LiFePO4 batteries be mixed?
Generally speaking, it is best not to, but it depends on the situation.

It is best not to mix batteries of different brands, because there may be subtle differences;

It is also best not to mix batteries with different degrees of old and new, because the weakest battery in the battery pack will restrict the performance of the entire battery pack;

Never mix batteries of different chemical properties, this may kill your LiFePO4 battery, although there are ways to achieve it, it is definitely not recommended for battery beginners to consider;

Batteries with different capacities can be mixed, but the premise is that both batteries are 3.2V and connected in parallel.
●How are LiFePO4 batteries stored?
The most important thing is the temperature. LiFePO4 batteries are well stored at room temperature (15°C~25°C), but too low temperature may damage the battery. In an icy environment, you need to pay attention to the insulation of the battery. Alternatively, the battery can be stored in a dry and ventilated room at 50% SOC.
●What should I do when I receive cells?
After receiving the battery, please immediately check whether the insulating layer of the battery (usually a blue film) is damaged and whether the QR code is scratched. Also use a multimeter to check the voltage/internal resistance/capacity. Be sure to charge the battery to full voltage before using it for the first time.
●What is Grade A battery cells?
● Grade A: Cells perform to manufacturer specifications.
● Grade B: Cells under-perform or have other defects.
● Grade C: Cells are used, repackaged, salvaged, or damaged.
●When assembling, what torque should I use?
Although we have tested and found that the welding studs can withstand 15N.m torque, we still recommend using no more than 6N.m torque.
Review
Review
x

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