SPECIFICATIONS

Base Material: -

Board Size: -

Board Thickness: -

Brand Name: -

Copper Thickness: -

Functional Application: -

Material: -

Min. Hole Size: -

Min. Line Spacing: -

Min. Line Width: -

Model Number: Li-ion BMS 18S 40A-120A

Place of Origin: Guangdong, China

Surface Finishing: -

Type: -

XR-20S-120AH NMC Battery Protection Board (18S 40A-120A)

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Frequently Asked Questions

1. Can my battery use your protection board?

Answer:
Whether you can use this protection board depends on two key factors:
1. How many series (S) does your battery have? You need a protection board with the same number of series.
2. What is the material of your battery? We offer protection boards for lithium iron phosphate and 18650 lithium batteries.

• If your battery is lithium iron phosphate (LiFePO4), each cell has a nominal voltage of 3.2V. You should choose a board for 3.2V lithium iron phosphate.

• If your battery is a ternary (Li-ion), cobalt-based, or manganese-based lithium battery, the nominal cell voltage is 3.6V (or 3.7V). Please choose the 18650 3.7V category.

2. How do I know what material my battery is?

Answer:
Check the battery label:

• Lithium iron phosphate batteries are usually labeled 3.2V.

• Other lithium batteries are typically labeled 3.6V or 3.7V.

If you cannot determine the material from the label, ask your battery seller directly. Many customers say "my battery is 18650 or 26650 soft pack, etc." — these refer to the shape, not the material. We cannot determine the appropriate protection board parameters just from the shape.

3. How many amps of protection should I choose?

Answer:
This depends on the motor power or controller current limit of your electric vehicle:

• For motors under 250W, choose 15A

• For motors under 500W, choose 20A

• For motors under 800W, choose 30A

If your motor is above 1000W, please contact customer service. The protection board's current must not be lower than the controller's current.

4. My battery is 20AH. Can I use this protection board?

Answer:
The amp-hour (AH) capacity of your battery is not directly related to the current rating of the protection board. Capacity is not the same as current. The protection board current rating should be based on the continuous discharge current your battery requires. The larger your battery, the more current it can usually provide — so choose a board with a higher current rating if needed. The capacity of the battery does not determine the protection board's specs.

5. What voltage should my charger be set to?

Answer:
Use a lithium battery-specific charger.
Do not use a lead-acid battery charger. Lead-acid chargers may cause overvoltage that can damage the MOSFETs on the protection board, rendering it inoperative.

For 18650 lithium battery chargers:

• Charging voltage = number of battery cells × 4.2V

1. How to place an order?

    If you are interesting in our products, welcome to contact us. Our sales colleagues will work out quotation and help you place an order as per your requirements as soon as possible.
    Please be sure to contact us for quotaiton before your purchase. Since the ferquent changes in the price of electronic components, our price updates erveyday. Hope your understanding!
    Since the large quantity of electronic components, there are still some products haven't been released yet. We are keeping on releasing. If we cannot find the product you need, you can contact us, we are good at and also very glad to help you source it.

2. Why your price is advantageous?

    For 17 years since established, we keep integrating supply resources of electronic components, committing to serve our customers faster, more stably and more cost-effectively.

    We keep 5000+ SKUs in stock. In addition, We also develop deep cooperation with manufacturers, authorized distributors and OEMs all around the world. Our professional sourcing colleague will help you source the components you need globally to minimize cost and maxmize efficiency.

3. How do you guarantee the quality?

    We have established a strict quality management system to ensure that every component from CHY is original and brand new.
    - Strictly management of suppliers. Review the qualification of suppliers and establish a supplier whitelist.
    - Comprehensive inventory management system. Make sure every chip traceable.
    - 100% test. Our products will at least undergo dual testing when in and out of the warehouse. 100% visual inspection. Acetone wipe test, X-ray test, ROHS test, De-cap test and Electrical test when necessary.

4. About Payment

    We accept and highly recommend you to usd Alibaba trade assurance order. You can pay the order by online payment (like credit card, Paypal, Apple pay and other local online payment) or wire transfer (T/T). Customers in different countries may apply different payment methods and different rates, please contact us for details.
    We also accept off-line order and payment through wire transfer(T/T).

5. Shipping & Delivery

    For products in stock, we will deliver it in 24 hours.We will inform you the tracking number by email.
For delayed orders, please refer to the shipping date agreed upon by us. Our colleague will update you about the delivery.

    We provive DHL, Fedex, UPS, Aramex, SF Express, EMS for shipping. There are also special line for some region. Please contact us. We will work out the suitable freight solution for you.