Daly Smart lifepo4 BMS K board 4S 12V 7S 8S 24V 16S 48V Li ion 3S 12V 6S 7S 24V 100A 60A 40A BMS For 18650 BATTERY PACK
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- Supplier: HUNAN AUK NEW ENERGY CO. LTD
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Product Overview
Description
Daly Smart lifepo4 BMS K board 4S 12V 7S 8S 24V 16S 48V Li-ion 3S 12V 6S 7S 24V 100A 60A 40A BMS For 18650 BATTERY PACK
Product Description
1. How to choose BMS? Necessary information: battery type, number of battery packs connected in series, load power or controller current limit, application scenarios;Secondary information: battery capacity, discharge rate, voltage, continuous discharge current, etc. 2. What is hardware BMS and what is Smart BMS? The hardware BMS has the most basic protection functions (overcharge, overdischarge, overcurrent, short circuit), and can be customized with temperature control and GPS functions and switch function of control MOS charge and discharge. The smart BMS is based on the addition of a Bluetooth module. It can download the APP to understand various data of the battery,and can customize the communication function: RS485/CAN. 3.What other extra function does BMS have? It can be connected to an external display screen and a light board to monitor the data of the battery pack.At the same time,The 12V port can be customized so that you can connect the modules you want.It can also connect an external parallel module, which can solve the problem of excessive mutual charging current of parallel battery packs. It can also be connected to a communication board to realize BMS parallel communication.The active balance module is also supported by BMS. It can balance the voltage difference of the battery pack and solve the problem of poor cell consistency. 4.How is the shipping cost calculated? Calculated based on the actual shipping cost of customer service. 5.Minimum Order Requirement (MOQ)? No, we don't have MOQ. different customers have different requirements, we can provide various capacity and size as per your requirements, also ODM / OEM is welcome.We support sample order service.
1. Overview
4S BMS is used for 4 series 12V battery pack.
We can design it for various lithium batteries like LiFepo4, LiMn2O4, and Li-polymer etc.
The main functions are: over charge protection, over discharge protection, over current protection, short-circuit protection, temperature protection etc.
2. Advantage
1)Use top quality (A-level) protective integrated circuit IC, from the solution of Seiko of Japan.
2)Strong load ability, constant discharge current 200A, use high voltage resistance, low inner
resistance power Mosfet. The heat sink will greatly help cooling.
3)IC itself has power balancing function. The circuit is simple and reliable.
4)Typical voltage detection for each cell. So each battery will be prevented over charged or over discharged. Over current and short circuit protection
function is very reliable.Long time short circuit of the load won’t affect the PCB and the battery.Temperature protection during charging and discharging.
5)Extreme low power consumption. The consumption of the whole device is less than 50uA.
6)PCB use high anti-corrosion, high water resistance, high impedance ESD conformal Coating
3.Technical parameter
(The following is an example for 3.2V rated LiFePo4 battery.
If your battery is 3.7V rated battery, we will set the parameters for it )
| Content | Spec | Unit |
Discharge | constant discharge current | 80/100/120/200 | A |
peak discharge current | 200/200/300/400 | A | |
Charge | charge voltage | 14.6 | V |
charge current | within 80/100/120/200 | A | |
Over charge protection | over charge volt | 3.6±0.05 | V |
over charge volt protect delay | 0.5 | S | |
Over charge volt release | 3.6±0.05 | V | |
Power balancing
| Power balance volt | 3.6 | V |
balance release volt | 3.6 | V | |
balance current | 35 | mA | |
Over discharge protection | Over discharge detect volt | 2.5±0.05 | V |
Over discharge detect delay | 0.5 | S | |
Over discharge volt release | 3.0±0.05 | V | |
Over current protection | Over current detect volt | 150 | mV |
Over current detect delay | 9 | MS | |
Over current protection | 400A(MAX) | A | |
Over current protect release | disconnect load |
| |
Short circuit protection | Short circuit protection |
External load short circuit |
|
Short circuit detect delay | 250 | uS | |
Short circuit detect release | Disconnect load |
| |
Temperature protection | Temp protection | none | ℃ |
resistance | Main circuit resistor | ≤10 | mΩ |
Self- consumption | Working current | ≤40 | uA |
Sleepy current(when battery is over discharged ) | ≤20 | uA | |
Working temp
| temp range | -30/+80 | ℃ |
FAQ
1.What is the common port and separate port? what is the difference?
We take 13S48V16A BMS as an example, common port 16A means your charge cathode and discharge cathode are connected in the same point end(our P-), charge cathode and discharge cathode are used in the common connection
port, so the charge current and discharge current are the same 16A. while the separate port is separately connected by charge cathode (C-) and discharge cathode (P-), so the charge current and discharge current are different, discharge current 16A, charge current 8A.
2.What is the balance function?
The working principle and function are as followings, when your one cell voltage is upto alarm voltage(Li-ion upto 4.18V, Life Po4 upto (3.6V), then the cell Balance starts to work, balance resistance starts discharge with 35ma(when balance discharge starts to work, BMS will starts a little heat up, which is the normal reflection), the cell is in both charging and discharging status, and others which are not reached to alarm voltage(Li-ion 4.18V, Life Po43.6V)are only in charging status, no discharging, when the fast cell voltage is reached to alarm voltage (Li-ion 4.25V, Life Po43.75V)BMS starts off power protection, all the other cells
are all in stop of charging, this process will enable your battery charging in balance current, and your battery voltage are in balance status, but when your cell voltage difference are in a big range, then balance can not be functionning.
well
3.The relationship between Battery capacity and BMS current?
There is no direct relationship between Battery capacity and BMS current, big capacity doesn`t mean a big battery, but rely on continue current, that is to say if your engine is powerful, your should choose high current of BMS, it is not relied on battery capacity.
4. What type of charger should I choose?
Lithium battery must choose specific charger, do not use Charger for Leadacid battery, for leadacid charger may have MOS with high pressure breakdown protection, which will not protect of BMS over charge. Life Po4 battery charger voltage=battery string No.X3.6V, while Li-ion battery charger voltage=Battery string No.X4.2V.
5. What current BMS should I choose ?
Take 10S36V as an example: what current BMS you choose is relied on your E-bicycle Motor power and current limitation of controller. eg., choose 16A for below 350W, 25A for below500W, 35A for below 800W, 60A for Below 1000W, higher than 1200W are contact with our service specialist for suggestions, one inall, continue current shall be higher than current limitation in Controller.
6. Whether my BMS damaged?
if you want to judge if the BMS is damaged, please take the folowing steps, to test if each cell voltage is the same with voltmeter? if the cell voltage difference is over 1.0V, the fault is displayed that it cannot run far, no power supply at the
start range, short charge time, all these issues are almost caused by battery cells, if BMS damaged is displyed as no charge, no discharge, no discharge while the battery has voltage.
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