Product ParametersModeLWS-4S30A-921PCM
SizeL90mm*W55mm*T9.6mmbattery series4S Availableworking
current20AvailableUsage(Cell Type)LiFePO4 battery packs
(12.8V/cell)ApplicationEbike, Solar products,
etcSampleavailable LWS-4S30A-921 (4S20A) for
LiFePo battery pack of 4 cells in series is a battery
protection solution of LWS's, can support a load with very stable,
in addition that the continuous current may be up to 20A
.Features IntroducedProvides protection for 4 series
LiFePo battery packProvides protections in charging and
dischargingProcesses the balance between cells smartly, the current
of it can be set freely by external components.Deals with
over-current and short-circuit protection with circuit
itselfProtect an electrical circuit from damage caused by over
current/ over load or short circuitSupport bluetooth
protocolProduct Picture Specification
Test
itemDescriptionCriterionVoltageCharging voltageDC:14.4V
CC/CVBalance voltage for single cell3.20±0.025VcCurrentBalance
current for single cell50±20mACurrent
consumption (sleeping)≤250uACurrent
consumption(working)≤10mAMaximal continuous discharging
current≤20AMaximal discharging current (time)NoneOver charge
ProtectionOver charge detection voltage for single
cell3.75±0.025VOver charge detection delay time0.5~1.5SOver charge
release voltage for single cell3.5±0.05VOver discharge
protectionOver discharge detection voltage for single
cell2.60±0.05VOver discharge detection delay time500~1500mSOver
discharge release voltage for single cell2.8±0.10VOver current
protectionOver discharge current protection50±10ADetection
delay time 1500~1500mSDetection delay time 2500~1500mSOvercharge
current protects current30±5ADetection delay time500~1500mSShort
circuit protectionShort circuit protection current/Detection delay
time50~800uSProtection conditionExterior short circuitRelease
conditionCut load,Auto recoveryCharge high temperature
protection55±5ºCCharge low temperature protection0ºCDischarge
high temperature protection60±5ºCDischarge low temperature
protection-20±5ºC/Release conditionThe temperature drops to 50ºC,
charge releaseOperating temperature range-20~+60ºCStorage
temperature range-20~+60ºCResistanceThe on-state resistance of the
main circuit≤5mΩBreak circuit protectionDisconnect the voltage
sampling circuit to turn off the charge and dischargeSupportNTC
ProtectionThermistor temperature protectionSupportElectronic
switchElectronic switchSupportReverse polarity
protection Nonsupport Electric Switch, Temperature
Switch, Passive Balance, Active Balance, 5V output, NTC,bluetooth
UART/BT/RS485/CAN communication/LCD dispay and etc., if you need
any above accessories, please must to contact our sales fisrt. All
items could be customized to your requirements,if without any
requests after order placed, we will produce as specification in
details page. Product advantage About LWS
Shenzhen Li-ion Battery Bodyguard Technology Co.,Ltd was
founded in 2013. We provide Battery PCM &BMS for Lithium
ion,LiFePo4,LTO battery pack and ODM & OEM services.Since
established, we have designed more than 900 types of hardware
PCM/BMS, and software BMS including HDQ/12C/SMBUS/
RS485/RS232 & Bluetooth and so on. Mainly covers battery
assembly 1S-35S in series, working current up
to 350A; the products arewidely used in light ,power
tool, electric bicycle,medical equipment, EV application
....etc. Li-ion Battery Bodyguard Technology Co., Ltd has
passed ISO 9001(2015) certification.We were also
awarded High Technology Expertise (HNTE) in 2018.
The spirit of "honesty, credibility first" business
principle, fast delivery time, competitive price ,high-quality
products & services have got us many customer's affirmation.And
because of that, our products have been sold to not only Germany,
France, the United States, Australia, India, South Korea, Japan but
also other countries and regions. As a professional
BMS designer and manufacturer, we are willing to support, help
every client to open new markets and extend new business. Meet
us, Meet reliablility, Meet our mutual development!
Packaging & shipping: Delivery
type:by air such as TNT,UPS,FEDEX or by sea ,just depend on your
convenient. Payment:L/C,T/T,Western
Union,PAYPAL etc.Warranty: The warranty period of this
product is 12 months, during which, any damage under normal usage
should be within the warranty service scope by Shenzhen Li-ion
Battery Bodyguard Technology Co., LTD. Any damages caused by below
abnormal conditions is not covered by the Warranty
policy.(1) Incorrect operation or use(2) Use of
environmental conditions exceeds the
specifications(3) Unauthorized disassembly and
maintenance(4) Caused by human sabotage(5) Water or
dampness FAQQ: How do I judge what material my battery is ?A:
Please take a look at the battery body.if the normal voltage of
your battery shows as 3.2V,the battery will be LiFePo4.If the
normal voltage of your battery shows as 3.6V or 3.7V, the battery
will be Li-ion or
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