Shenzhen Juyi Science And Trade Co., Ltd.
Shenzhen Juyi Science And Trade Co., Ltd.
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BMS for lithium battery
Why are BMS for lithium battery so important? These batteries are very powerful, but their reactions to misuse can be dangerous. Therefore, it is necessary to monitor each electrochemical cell to prevent such cases of unauthorized use.
This monitoring work is carried out thanks to an electronic management card called BMS “Battery Management System”
Lithium cells are very sensitive to their environment: If they are exposed to too severe conditions (voltage, temperature) or if they are subjected to shocks, this can lead to safety problems in the battery.
As the electrolyte is liquid, the risk of short-circuit due to leakage can quickly become dangerous. The liquid reacts with air or water and becomes extremely corrosive.
The critical cases are:
Overcharging
Exposure to too high or too low temperatures
Over-discharge followed by recharging
Short circuit
The consequences of these critical cases are:
A significant decrease in battery performance
Decreased battery life
The risk of fire
| Item type | Parameters | |||||||||
| 1 | Parameter Overview | Product Model | EK-BM4S200A | EK-BM4S200A | EK-BM4S200A | EK-BM4S200A | ||||
| Product Size(mm) | L111*W68*T15 | L111*W68*T15 | L111*W68*T15 | L111*W68*T15 | ||||||
| Product Weight(kg) | 0.1 | 0.1 | 0.1 | 0.1 | ||||||
| Product Material | FR-4 / Lead-free spray tin | FR-4 / Lead-free spray tin | FR-4 / Lead-free spray tin | FR-4 / Lead-free spray tin | ||||||
| Applicable battery type | Lifepo4 | Li-ion | Lto | SIB | ||||||
| Applicable battery string number | 4S | 4S | 4S | 4S | ||||||
| Rated discharge current | 200A | 200A | 200A | 200A | ||||||
| Peak starting current | 300A | 300A | 300A | 300A | ||||||
| Item type | Trigger (time) | Trigger (time) | Trigger (time) | Trigger (time) | Trigger (time) | Trigger (time) | Trigger (time) | Trigger (time) | ||
| 2 | Charging protection | Overvoltage protection voltage value | 3.65V/1s | 3.50V/1s | ||||||
| Balanced phase difference voltage value | 30Mv/1s | / | ||||||||
| Balanced voltage value | 3.45V | / | ||||||||
| Overcurrent value | 60A/2s | / | ||||||||
| ①Low temperature value | -5℃/2s | 0℃/2s | ||||||||
| ①Overtemperature value | 75℃/2s | 65℃/2s | ||||||||
| ②Low temperature value | -5℃/2s | 0℃/2s | ||||||||
| ②Overtemperature value | 55℃/2s | 50℃/2s | ||||||||
| 3 | Discharge protection | Undervoltage protection voltage value | 2.3V/0.5s | 2.7V/0.5s | ||||||
| ①Overcurrent protection value | 120A/2s | / | ||||||||
| ②Overcurrent protection value | 160A/250ms | / | ||||||||
| Short circuit protection value | 500A/64us | / | ||||||||
| ①Low temperature value | -20℃/2s | -10℃/2s | ||||||||
| ①Overtemperature value | 80℃/2s | 55℃/2s | ||||||||
| ②Low temperature value | -20℃/2s | -10℃/2s | ||||||||
| ②Overtemperature value | 65℃/2s | 60℃/2s | ||||||||
| 4 | Others | Standby current consumption | 25mA/180s | / | ||||||
| Motherboard lock voltage | 0.8V/30s | / | ||||||||
Wiring precautions:
1. Installing the protective board requires a certain amount of technical electronic knowledge.
2. When wiring, first connect the B- wire at the soldering pad position to the total negative terminal of the battery (the B- wire should be soldered to a short and thick wire) and solder the wired terminal to the battery pack first, and then insert the protective plate.
3. The connection between the battery terminal B- and the protection board terminal B- should be short and thick, otherwise it will cause the protection board to charge and discharge in advance and malfunction.
4. You need to use thick wires when wiring P+/P-. Wires that are too thin and too long will burn the board!
Q1. Why did we choose you?
* We can provide you with efficient after-sales service, with more than 10 years of strong technical support.
* Products have passed FCC, CE, ROHS and other international standards certification.
* We can provide you with factory price, Welcome you to visit our factory and production process.
Q2. What is your product range (type)?
*We mainly do battery management systems in the fields of power batteries, energy storage batteries and consumer batteries.
*Mainly used for LFP, Li-ino and LTO batteries.
Q3: How do I know which kind of material & type my battery is ?
*Please look the battery body, If the normal voltage of your battery shows 3.2V, The battery is LiFePo4.
*If the normal voltage of your battery shows 3.6V or 3.7V, the battery is Li-ion or Lto battery.
Q4. Do you have minimum order requirements?
Can it be customized? What is the lead time for samples and batches?
*Our minimum order quantity is 1 piece, ODM customization is available.
* 1~3 days delivery of existing samples, 3~10 days delivery of customized samples.
Q5: What if i can't use it?
*Regular products have instructional videos, We can also support online video call guidance from engineers.
Q6. What are your terms of payment?
*We accept wire transfer and cash payment, all negotiable. Payment method :visa, mastercard, T/T, PayPal, APPLE_PAY, GOOGLE_PAY, GC_REAL_TIME_BANK_TRANSFER, RMB
Q7. How do you guarantee the quality?
* All our products are subjected to professional laboratory 100% testing, as well as repeated aging tests.
* Obtained FCC, CE, ROHS and other international standard certification.
* Provide 3 years after-sales warranty service. Free spare units for replace in 3 years.
Q8. How to choose a BMS suitable for our battery?
*Depending on the voltage and current that matches your battery, you can consult our customer service and we will provide it for you equipped with the most suitable battery management system.
Q9. How can i contact you?
*We have 7x24 hours online service, Please leave us a message online.
*You can also contact us by Email, WhatsApp, WeChat, etc(see below). We are so glad to work with you.