Home > Suggestions on designing Lithium battery packs
When designing a lithium battery pack for your
device, you must have two levels of protection. The
primary protection should be from the device for charge
and discharge of the battery. The secondary protection
is from the battery's protection circuit board which
protects batteries from over-charge, over-discharge and
short circuit.You must not rely on
battery's PCB/PCM protection only.Let's
use Lithium-ion cells as an example:
Primary
protection: When designing
protection on device, the charge circuit should be
cut off at 4.2V/cell and discharge circuit should be
cut off at 2.5V -3V/cell (please refer to cell's
specification).
Secondary protection: When
designing a protection circuit board (PCB/PCM), the
over-charge threshold voltage should not exceed
4.35V/cell and the over-discharge threshold voltage
should not below 2.3V/cell.
Please also consider using a thermistor to
monitor the temperature, thermostat to cut off at
high temperature and polyswitch to limit the current
when necessary.
Please always check the cell's specification to
determine the cut off voltage and charge/discharge
current.
Design of enclosure: The battery should
be attached to enclosure firmly. Due to the nature of
polymer cell, it might swollen over time. Please leave
at least 5mm or 10% more (whichever is bigger) space to
allow the cell to expand.
For medical device, we strongly recommend use brand
name cylindrical cell, like LG, Sony, Panasonic and
Samsung, 18650 cells.
Suggest to replace the battery pack once every two
years, used or not used.
Certifications:For Lithium
batteries, you will need UN38.3 for shipping, also you
might need IEC62133 or UL2054. Those 3 tests need cell
to pass UN38.3/IEC62133/UL1642 accordingly first before
the packs to get UN38.3/IEC62133/UL2054 test. We suggest
you check the following links when selecting cells. If
there is any cell meet your requirement, you will save
around $10K when you decided to get pack's certification
later.
There are
three types of Li-Ion cells on current market based on chemistry of cathode
materials. Please see the table below to see advantage and disadvantage of
each type cell. Among of them, LiCoO2series Li-Ion cell has the
highest energy density and is most popular cell using in the market.
LiFePO4 and LiMnNiO4 cell still are in developing.
Category : LiFePO4/LiFeMnPO4 Batteries Lithium Iron Phosphate (LiFePO4, LFE) is kind of
Li-Ion rechargeable battery for high power applications, such as EV car ,
Power Tool and RC hobby. LFP cells feature with high discharging
current, non explosive, long cycle life (>2000@0,2C rate, IEC Standard),
but its energy density is lower than normal Li-Ion cell (Li-Co) (higher NiMH
cell). Please click
Knowledge on LiFePO4 battery to learn more detail. LFP cell has 3,2V
nominal working voltage and shall be cut-off power at 3,6-3,8V per cell
during charging. Please see the table below to see comparison between LFP
and other rechargeable batteries. LFP battery has the lowest cost if
considering its long cycle life.
Chemistry
Voltage
Energy Density
Working Temp.
Cycle Life
Safety
Environmental
Cost based on cycle life x wh of SLA
LiFePO4
3,2V
>120 wh/kg
-20 - 60 °C
>2000
(80% of initial capacity at 0,2C
rate, IEC standard)
If you want to use this protection circuit
board for a battery that is less than the rated drain, you must add
additional protection device to protect the battery itself. Such as:
proper rated polyswitch.
To achieve balance, each cell in battery pack
must has equal voltage within tolerance. When charger LED turn Green,
allow 30 minutes for pack to balance before use.
You must be professional in Lithium battery
pack to buy the protection circuit board. Misusing may cause battery
damage or explode. We are not responsible for any damage caused by user.
So calledHi-Power Lithium Polymer
Battery(Polymer Li-Ion) is made by
special electrolyze which allow polymer battery drain at >5Crate
without over-heated and damaged. Batteryspacedesigns /
manufactures the highest quality hi-power Li-Polymer packs for
RC Car, RC air. Airsoft and E-bike at the most competitive
price. The customized battery pack is our strength. We can
help customers design/assembly a special battery pack in ourNorth
Californiafacility and deliver a
prototype pack within one week.
Please see the table below to Compare properties between
NiMH, Lead Acid and Li-IonBatteryat
Similar Energy Level (360 Wh)
0.5C CC
(constant current) charge to 4.2V, then CV (constant voltage 4.2V)
charge till charge current decline to ≤0.05C
6
Charging
time
Standard
Charging: 3.0hours (Ref.)
Rapid charge: 2hours (Ref.)
7
Max.charge
current
1.0 C
8
Max.discharge current
3.0 C
9
Discharge
cut-off voltage
2.75V
10
Operating
temperature
Charging:
0°C ~ 45°C Discharging: 0°C ~
45°C
11
Storage
temperature
-10°C ~
+45°C
12
Operating
temperature
Length: 121
mm Max (not including tabs)
Width: 66 mm Max Thickness:
7.5 mm Max
Weight：127.2gModel：
Sv: FW: Can I buy HCX-D242LI02S35A-02? Peter Adolfsson
Hi and thank
you for the answer but sorry, the shipping fee is to high. Sorry again.
With the best regards from Peter Adolfsson.
Från: elvis@litechpower.com
<elvis@litechpower.com> Skickat: den 12 juni 2023 08:23 Till:
peter.adolfsson.bkg405h@outlook.com <peter.adolfsson.bkg405h@outlook.com>
Kopia: Henry Zhang <henry@litechpower.com>; info@litechpower.com
<info@litechpower.com> Ämne: Re: FW: Can I buy HCX-D242LI02S35A-02?
Re: FW: Can I buy HCX-D242LI02S35A-02? Du svarade Mån 2023-06-12 18:46
elvis@litechpower.com peter.adolfsson.bkg405h@outlook.com Henry
Zhang; info@litechpower.com Hello Peter,
this is Elvis,
thank you for reaching out,
and since this is a remote address, the
shipping fee will be more expensive and we can ship it by DHL, and the
shipping fee is about $93.00.
should I make a Proforma invoice for you?
I am looking forward to your reply, thank you.
Elvis Feng Sales
representative
Thanks and Best Regards
LiTech Power Co., Ltd
Lithium Technology Power solutions
German Office: LiTech Power GmbH Olewischtwiet 20 D-22177
Hamburg, Germany
------------------ Original ------------------ From:
Support LiTech Power <info@LiTechPower.com> Send time: Tuesday, June 6, 2023
09:51 PM To: Elvis Feng <Elvis@LiTechPower.com> Subject: FW: Can I buy
HCX-D242LI02S35A-02?
Hi
Technical Support
Thanks and Best
Regards
LiTech Power Co., Ltd Lithium Technology Power solutions
German Office: LiTech Power GmbH Olewischtwiet 20
D-22177 Hamburg, Germany
------------------------------------------------------------------ From:
Peter Adolfsson <Peter.Adolfsson.bkg405h@outlook.com> Date: Tuesday, June 6,
2023 at 21:49 To: Support LiTech Power <info@LiTechPower.com> Subject: Can
I buy HCX-D242LI02S35A-02?
Hello!
Can I buy?
How much is
the cost for shipping to Sweden with DHL? not DHL express please. Maybe by
ground, is it ok? please, not by air. No hurry. I can wait many months.
Please not UPS because they can not deliver to me because of they sending back
the items to where it comes from (you).
Thank you and with the best
regards from Peter Adolfsson, Sweden.
1. Battery
management circuit board for 7.4V 2S Li-ion and Li-polymer battery pack.
2. BMS/PCB/PCM applies for 2 cells Li-ion/Li-polymer battery pack.
3. To
prevent the battery packs from overcharge, overdischarge, over current, over
temperature, short circuit.
4. The Maximal working current: 35A.
5. Compatible with both Li-ion and Li-Polymer cells.
We keep materials in
stock only, we need around 3-7 days for samples productions.
Sale Price：
$16.09
Quantity: 3
3-50 $16.09
Weight： 21g
Model：
HCX-D242LI02S35A-02
3 x 16,09 = 48,27 $
----------------------------------------------------------------------------
Re: Hi there, Are you looking for lithium polymer cells or packs? 📑 We ...
Sam from Support <sam.abdelaal@voltaplex.com>
peter.adolfsson.bkg405h@outlook.com Sam Abdelaal Hi
Thanks for
reaching out to us. Currently we are not selling this individual PCB/BMS.
However we can potentially build full pack instead if it is for business purpose
intended for mass production. Please let us know if this option works for you.
If you still want to purchase this item you can find it on
www.bestechpower.com . MOQ is 2 units.
Thanks, Sam
Reply in our
Messenger You may need to sign in to Support again. You can also reply
directly to this email.
Powered by Intercom intercom
Your
shopping cart BatterySpace Here's a copy of your shopping cart
Product Protection Circuit Module (PCM) with Equilibrium Function for
7.2V/7.4V Li-Ion Battery Pack (20A limit) (#1083) Quantity: 1 $15.95
This email was sent to peter.adolfsson.bkg405h@outlook.com from
BatterySpace.
-----------------------------------------------------------------------------------
Re: Must I pay about 200 dollar? Du svarade Tor 2023-06-01 09:56
BatterySpace <sales@batteryspace.com> Du Hi Peter,
Did
you purchase any products from us? Do you have the order number?
We
normally use FedEx to ship overseas, one piece of PCM #1083 costs $142.88 for
shipping.
Best regards, Shelly Ye Batteryspace.com/AA Portable
Power 825 S.19th St.,Richmond, CA 94804 Tel: +1-510-525-2328 Fax:
+1-510-439-2808 Email: sales@batteryspace.com Site:
http://www.batteryspace.com
On Wed, May 31, 2023 at 12:23 PM Peter
Adolfsson <Peter.Adolfsson.bkg405h@outlook.com> wrote: Hello... Must I pay
about 200 dollar for the shipping for only one piece of Protection Circuit
Module (PCM) with Equilibrium Function for 7.2V/7.4V Li-Ion Battery Pack (20A
limit) (#1083)?
Best regards from Peter Adolfsson
I have such a
bad experience with UPS. They did not delivered to me. I do not know why...
Please, can you use another shipper?
Is LT-34SF100A-A design for
LiFePO4
(3,2 V) ? https://www.amazon.se/ Your conversation with Amoq313 14-Jun-2023 20:08 Hello
but I wonder if it for LiFePO4 or Li-Ion cell? 3,2 V or 3,7 V? You had write
that is is for Balance detection voltage 4.20±0.05V but it is too high for
LiFePo4. Thank you from Peter 15-Jun-2023 05:28 This board consists of 3
series of lithium batteries. Three series of 12V protection plates, four series
of Lithium iron phosphate protection plates. This is the product composition,
used to protect lithium ion batteries
•
MULTIFUNCTIONAL: This battery protection card protects the battery pack from
overcharging, overcharging overcurrent and short circuit, very useful. •
UTSEENDE --- Continuous discharge current: 100A(MAX); Charging voltage: 12.6V;
Charging current: 10A(MAX); Overcharge protection delay: 0.5S; Working
temperature: -30/+80°C • BALANCE --- Battery protection board keeps each cell
in balance and good life with equalweight function • WIDE APPLICATIONS:
Suitable for DIY work and school science projects, widely used in battery
protection work. • PORTABLE:This battery protection card is very portable,
perfect for DIY work.
Product details Package Dimensions : 11 x 7
x 1 cm Date First Available : 11 Nov. 2022 Manufacturer : Garosa
ASIN : B0BM3W9GFY Item model number : Garosaftnqrdyv7x Country of
origin : China
Product description Specifications: Discharge
contact(MAX) A discharge current Momentary Discharge Current 150A Charge
Voltage 12.6V Charging current 10(MAX) A Overcharge protection Overcharge
detection Protection Delay 0.5 S Overcharge release
Balance detection voltage Trigger Voltage Balance
current 42±5mA Overdischarge protection Overdischarge detection
Overdischarge detection delay 0.1 S Trigger Voltage Over Current
Protection Detect Voltage 150mV Detection delay 9mS Current sensing
200±10A Trigger State Cut Load Short Circuit Protect Protect Condition
Load Short Circuit Detection delay 250uS Trigger State Cut Load
Temperature Protect / / ℃ Resistance Inner ≤25mΩ Self-Consumption Working
Current ≤20uA Sleep current (in case of overdischarge) ≤10uA Working
temperature range -30/+80℃ Size: 70*51.5*10mm Weight: 50
g?
2s 3,2v bms
LiFePO4 6,4v 1865015A common port protection board bms pcm
Lithium battery protection plate
60,83 SEK 101,39 40% off Price
includes VAT
2S LFP4 6,4V 25A
JH-886175 2S V1.0-35A 6,4V
LFP4: Charging protection
Over-charge protection voltage lifepo4： 3.750V±0.05V Over-charge protection
delay time： 1000mS Over-charge protection recovery voltage lifepo4： 3.6V
±0.05V
Discharge protection Over-discharge protection voltage lifepo4：
2.000V±0.1V Over-discharge protection voltage delay time: 200mS
Li ion: Charging protection Over-charge protection voltage
lifepo4： 4.28V±0.025V Over-charge protection delay time： 1000mS
Over-charge protection recovery voltage lifepo4： 4.2V ±0.05V
Discharge
protection Over-discharge protection voltage lifepo4： 2.400V±0.1V
Over-discharge protection voltage delay time: 200mS
GET
THE LOOK✨:2s 3.2v bms LiFePo4 6.4v 1865015A common port protection board bms pcm
Lithium battery protection plate PRODUCT PROPERTY:✨ 1: If you are looking for
our product, the brand of minerals is your good choice.The accessory type of our
product is charger accessories.Our product is from cn(origin).
REASONS TO
BUY:✨ Plate: bms battery protection plate is equipped with a protective cover,
which can protect the battery from being damaged by external force. ✨ 18650
2s 5a battery protection board: family members of all ages can enjoy maximum
protection from fcc, rohs, and marine environments. ✨ 2s 6 4v lifepo4 bms:
four different sizes bms: six different colors for you to choose from, one is
all the same as the picture shown. ✨ Easy to install & remove: easy to
install and remove, no need to use tools, just put the battery into the bms port
protection plate.
RELATED INFO:✨ 2s lifepo4 protection board: protective
board: protects battery from over-charging, short-circuit, over-voltage, and
over-current. ✨ Bms 2 battery protection: bms battery protection plate with
built-in intelligent chip, can protect your battery from overcharging,
overheating, and overcurrent.
Specifications Model Number HP02S006
Accessory Type Charger Accessories Brand Name Minerals Origin
Mainland China Certification NONE
Lifepo4 2S 6.4V
15A/20A/25A BMS Applicable 3.2V lifepo4 battery(Lithium Iron Phosphate)
Connection method:Common Port Over-discharge protection voltage :2.0V±0.1V
Continuous working current :15A/20A/25A Instantaneous protection
current:65A/80A/90A Overcurrent recovery conditions :charge recovery or
disconnect load Short-circuit recovery conditions :charge recovery or
disconnect load Overcharge protection voltage :3.7V±0.1V Continuous
charging current :15A/20A/25A Charger voltage :7.4V (recommended)
Activation method :(1) B- and P- wires can be short-circuited once
(2)Rechargeand activate Work power consumption:≤10uA Main circuit
conduction internal resistance:≤5mΩ Temperature range :-40℃ ~ 80℃
Appearance size:60*25*3.5 MM other instructions:15A BMS=6MOS 20A BMS=8MOS 30A
BMS=10MOS Due to different production batches, we will randomly send blue or
green or red circuit boards.
Li-ion 2S 7.4V 15A/20A/25A BMS Applicable
:3.7V or 3.6V lithium battery Connection method:Common Port Over-discharge
protection voltage :2.5V±0.1V Continuous working current :15A/20A/25A
Instantaneous protection current:65A/80A/90A Overcurrent recovery conditions
:charge recovery or disconnect load Short-circuit recovery conditions
:charge recovery or disconnect load Overcharge protection voltage
:4.25V±0.025V Continuous charging current :15A/20A/25A Charger voltage
:8.4V (recommended) Activation method :(1) B- and P- wires can be
short-circuited once (2)Rechargeand activate Work power consumption:≤10uA
Main circuit conduction internal resistance:≤5mΩ Temperature range :-40℃ ~
80℃ Appearance size:60*25*3.5 MM other instructions:15A BMS=6MOS 20A
BMS=8MOS 30A BMS=10MOS Due to different production batches, we will randomly
send blue or green or red circuit boards.
Here are some important attributes when
selecting a battery for an application:
1. Internal Resistance, 2.
Operational Load Current, 3. Energy Density (Size & Weight), 4.
Charge/Discharge Cycles (Life Cycle), 5. Capacity (dominates the operational
duration without external power source present).
Like most engineering
work, these key attributes do not exist in the same technology. There is
always a trade- off between them when selecting the battery chemistry for a
portable application. Refer to Microchip’s AN1088 “Selecting the Right
Battery System for Cost-Sensitive Portable Applications While Maintaining
Excellent Quality” for the details of battery chemistry comparisons.
Li-Ion batteries have played an important role in today’s portable world
because of the advantages in high energy density, low maintenance
requirement, relatively low self discharge rate and higher cell voltages.
1-cell Li-Ion batteries especially enjoy the largest share of the Li-Ion
battery market while 1-cell and 2-cell applications are available in more
than 70% of the total available market.
Li-Polymer batteries which are
also recognized as Li- Ion Polymer batteries are similar in terms of chemistry
with Li-Ion batteries. Li-Polymer can be charged using the same algorithm as
Li-Ion batteries because of their similar characteristics. The flexible form
factors and very low profile to fit inside the compact applications make
Li-Polymer an ideal candidate for MP3 Players and Mobile Phones.
Note:
The major drawbacks of Li-Ion batteries are higher initial cost and the aging
effect. Li-Ion batteries age over time regardless of the number of cycles
that have been reached. A protection circuit is required for Li-Ion
batteries to prevent overvoltage during charge cycle and undervoltage during
the discharge cycle; overcurrent as well in both directions.
Batteries
usually occupy a considerable amount of space and weight in today’s portable
devices. The energy density for each chemistry dominates the size and
weight for the battery pack. Li-Ion has advantages in both energy density
weight and energy density volume among other available battery technologies.
Selecting the
Right Battery System For Cost-Sensitive Portable Applications While
Maintaining Excellent Quality
Author: Brian Chu
Microchip Technology Inc.
---
Li-Ion (Lithium-Ion) Li-Ion batteries have
advantages in high energy density, low maintenance requirement, relatively low
self discharge rate and higher voltage per cell. (Table 1 and Table 2) The
major drawbacks of Li-Ion batteries are higher initial cost and aging effect.
Li-Ion batteries age over time regardless of the usage. Protection circuitry is
required for Li-Ion battery to prevent over voltage during charge cycle and
under voltage during discharge cycle.
Li-Polymer (Lithium Polymer) Li-Polymer
batteries should be recognized as Li-Ion Polymer batteries. It is designed as an
improved version of Li-Ion with flexible form-factors and very low profile. It
is perfect for miniature applications, such as Bluetooth headsets or MP3
players. It has similar characteristics as Li-Ion and can be charged with same
algorithm. It is a different technology compared to Li-Ion, but will be
discussed as Li-Ion in this application note.
Automotive voltage protection with automatic cell
balance for 2-cell li-ion batteries, OVP = 4,30V. BQ29209-Q1 Voltage Protection with
Automatic Cell Balance for 2-Series Cell Li-Ion Batteries:
TECNOIOT, 2S, 20 A, 7,4 V / 8,4 V, lithium battery
protection board, BMS, balance version:
【2S20A】2S 20A 7.4V 8.4V 18650 Lithium Battery Protective
Plate BMS Balance Version 【Note】The successful start of the drill requires two
10C-20C Power Batteries, or 4 5C-10C Batteries (ordinary 18650 can't start the
drill! ! ! ); 0V and 8.4V cable, please use 2 square mm above copper wire
(cannot use nickel plate!!! ); 【Design Compact】Applicable area: Suitable for
lithium batteries with rated voltage of 3.7V and full voltage of 4.2V (including
18650, 26650, polymer lithium batteries, without restriction of the dimensions).
Product size: 45 x 15 x 3.4mm (standard), 48 x 20 x 3.4mm (balancing). Charging
voltage: 8.4V-9.0V 【Description】Continuous discharge current (upper limit):
20A (if the cooling environment is not good, reduce load current);Continuous
charging current (upper limit): 10A; balanced version: Suitable for starting
currents below 25A and below 50W power drills, or resistive loads under 168W,
with balanced charging function. 【Note】: Connect 0V, 4.2V, 8.4V according to
the chart carefully. When connecting the battery for the first time, it must be
charged before output. When the battery is charged, the "43" resistance heating
is a normal phenomenon, indicating that the smoothing circuit works; if the "43"
resistance is also heated in state of not being charged, please check whether
the wrong line is connected. 【Note】For some customers with bad electronic
foundation, please explain: Do not mix good batteries and bad batteries
together! Capacity/inner resistance of 2 batteries should be as close as
possible! (1 good battery + 1 bad battery = 2 battery use effect).
Applicable area: Suitable for lithium
batteries with a rated voltage of 3.7V and full voltage of 4.2V (including
18650, 26650, polymer lithium batteries, without limiting the dimensions).
Product size: 45*15*3.4mm (standard), 48*20*3.4mm (balancing) Charging
Voltage:8.4V -9.0V Continuous discharge current (upper limit): 20A (if the
cooling environment is not good, reduce the load current) Continuous charging
current (upper limit): 10A Balanced version: Suitable for starting currents
below 25A and below 50W power drills, or resistive loads under 168W, with
balanced charging function.
Note:
Note 1: The successful start of
the drill requires two 10C-20C power batteries, or four 5C-10C electric
batteries (regular 18650 cannot start drilling! ! ! ); 0V & 8.4V cable, please
use 2 square mm above copper wire (can not use nickel plate!!!) Note 2:
Connect 0V, 4.2V, 8.4V according to the diagram carefully. When connecting the
battery for the first time, it needs to be charged before expiry. Note 3:
When the battery is charged, the "43" resistance heating is a normal phenomenon,
indicating that the smoothing circuit is working; if the "43" resistance is also
heated in the state of not charging, please check if the wrong line is
connected. For some customers with poor electronic foundation, please
explain: Do not mix good batteries and bad batteries together! Capacity/internal
resistance of 2 batteries should be as close as possible! (1 good battery + 1
bad battery = 2 battery usage effect).
The
Batemo Cell of the lithium-ion battery cell LithiumWerks ANR26650-M1B is a
high-precision, physical battery model with global validity. As a digital twin
it seamlessly integrates into your research, development and battery analytics
by basing your decisions on simulations.
Capacity [close] The nominal
capacity originates from the manufacturer’s data sheet, if available.
When the data sheet is unavailable, the nominal capacity is estimated.
Batemo measured the C/10 capacity by discharging the cell at an ambient
temperature of 25°C from 100% with a constant current of 0.26A (0.1C)
until reaching the voltage of 2.0V. The thermal boundary condition is
free convection.
nominal 2.56 Ah C/10 2.50 Ah
Current [close] All quantities are measurement results of the
Batemo battery laboratory. The continuous current is the highest current
that completely discharges the cell without over-heating it. Therefor,
the cell is discharged from 100% state of charge at an ambient
temperature of 25°C with a constant current until reaching a residual
state of charge of 10% and either the voltage of 2.0V or 90% of the
maximum surface temperature of 54°C. The peak current is the current the
cell can deliver for 5 minutes. Consequently, the cell is discharged
from 100% SOC at an ambient temperature of 25°C with a constant current
until reaching either the voltage of 2.0V or the surface temperature of
60°C after 5 minutes. The thermal boundary condition is free convection.
These operational conditions might be outside the specification of the
cell manufacturer.
continuous 23.9 A peak 29.2 A
Energy [close] Batemo measured the
C/10 energy by discharging the cell at an ambient temperature of 25°C
from 100% with a constant current of 0.26A (0.1C) until reaching the
voltage of 2.0V. The thermal boundary condition is free convection.
C/10 8.10 Wh
Power [close] All quantities are
measurement results of the Batemo battery laboratory. The mean
continuous power is the highest power that completely discharges the
cell without over-heating it. Therefore, the cell is discharged from
100% state of charge at an ambient temperature of 25°C with a constant
current until reaching a residual state of charge of 10% and either the
voltage of 2.0V or 90% of the maximum surface temperature of 54°C. The
peak power is the power the cell can deliver for 5 minutes.
Consequently, the cell is discharged from 100% SOC at an ambient
temperature of 25°C with a constant current until reaching either the
voltage of 2.0V or the surface temperature of 60°C after 5 minutes. The
thermal boundary condition is free convection. These operational
conditions might be outside the specification of the cell manufacturer.
continuous 69.7 W peak 83.9 W
Energy Density [close]
The energy densities result from the C/10 energy, the cell weight and
the cell volume.
gravimetric106
Wh/kg volumetric235
Wh/l
Power Density [close]
The power densities result from the peak power, the cell weight and the
cell volume.
gravimetric1.10
kW/kg volumetric2.43
kW/l
Batemo
Cell
The
Batemo Cell of the lithium-ion battery cell LithiumWerks ANR26650-M1B is a
high-precision, physical cell model with global validity. As a digital twin it
seamlessly integrates into your research, development and battery analytics by
basing your decisions on simulations. See the details to
learn more about the features and capabilities of the Batemo Cell.
Batemo Cell Version
1.308
Release Date
August 01, 2022
Batemo
demonstrates the accuracy and validity of the Batemo cell by comparing battery
simulation and measurement data in the range given below. Validation is
extensive, experimental characterization covers the total operational area of
the cell: At low and high temperatures, up to the maximal current and in the
whole state of charge range.
State of Charge Range
0 … 100%
Current Range [close] The current range are the electrical current limits
as used in the Batemo battery laboratory. Please see the LithiumWerks
ANR26650-M1B data sheet for the precise definition of the current safe
area of operation of the cell.
-120 A discharge … 21 A charge (-47.0C … 8.0C)
Voltage Range [close] The voltage range
are the electrical voltage limits as used in the Batemo battery
laboratory. Please see the LithiumWerks ANR26650-M1B data sheet for the
precise definition of the voltage safe area of operation of the cell.
2.0 … 3.6 V
Temperature Range [close] The
temperature range are the thermal limits as used in the Batemo battery
laboratory. Please see the LithiumWerks ANR26650-M1B data sheet for the
precise definition of the temperature safe area of operation of the
cell.
-20 … 60 °C
Moreover, the Batemo Cell validation is fully transparent. The Batemo Cell Data
contains the raw measurement and simulation data. For all experiments the
voltage, temperature, power and energy accuracies are calculated. This allows
straight-forward evaluation and analysis of the Batemo Cell validity. The graphs
show a selection of characteristic data of the cell LithiumWerks ANR26650-M1B to
evaluate the cell performance.
Discharge Characteristics:
The electrical and thermal discharge behavior is strongly nonlinear.
Pulse Characteristics:
The shape of different current pulses changes strongly.
Energy Characteristics:
The graph visualizes how much energy the cell can deliver when operated at
different powers.
Power Characteristics:
The more power the cell supplies, the shorter it can deliver the power.
Thermal Characteristics:
The thermal losses heat up the cell the more, the higher the depleted
power is.
Discharge Characteristics
Pulse Characteristics
Energy Characteristics
How much
energy can it deliver?
Power
Characteristics
How long
can it deliver the power?
Thermal Characteristics
How hot
does it get?
The mean
accuracies give an overview of the Batemo Cell accuracy. Therefore, the root
mean square of the difference between the measurement and simulation result is
derived for the voltage, the temperature, the energy and the power. Relative
numbers relate the accuracy to the respective absolute value.
Mean Voltage Accuracy
0.032 V
1.2 %
Mean Temperature Accuracy
0.8 K
1.0 %
Mean Power Accuracy
0.62 W
1.2 %
Mean Energy Accuracy
0.070 Wh
1.9 %
The
Batemo Cell precisely describes all aspects of the cell. It is the perfect tool
for battery system development.
Batemo
Cell Data
Batemo
offers an extensive, experimental characterization of the lithium-ion battery
cell LithiumWerks ANR26650-M1B. The data contains measurement results in the
total operational area of the cell. The descriptions and graphs below explain
and show the available measurements. The Batemo Cell Viewer allows easy and fast
analysis, evaluation and comparison of the data. See the details to
learn more.
Constant Currents
The cell
is discharged from 100% SOC or charged from 0% SOC with different constant
currents at different ambient temperatures. The thermal boundary condition is
free convection. The measurement stops when reaching either the voltage of 2.0V
or 3.6V or the surface temperature of 60°C. The graph shows for which ambient
temperatures and charging and discharging constant currents measurements are
available.
Pulse
Currents
The cell
is discharged from 100% SOC or charged from 0% SOC with current pulses followed
by no-load phases at different ambient temperatures. The thermal boundary
condition is free convection. The measurement stops when reaching either the
voltage of 2.0V or 3.6V or the surface temperature of 60°C. The graph shows for
which ambient temperatures and pulse currents measurements are available.
Power
Profiles
The cell
delivers a typical power profile from 100% SOC at different ambient
temperatures. The thermal boundary condition is free convection. The measurement
stops when reaching either the voltage of 2.0V or the surface temperature of
60°C. The table summarizes for which ambient temperatures the profile is
available.
Ambient Temperature
Available
-20 °C
0 °C
25 °C
40 °C
Batemo
Cell Report
Batemo
offers a detailed report of the lithium-ion battery cell LithiumWerks
ANR26650-M1B. The report covers all important aspects about the cell. This
information greatly helps you to further evaluate and compare the cell. It is a
profound basis for your decisions concerning your battery system design. See the details to
learn more.
Accumulator holder to the accumulator
Lithium Werks’ 26650 Lithium Ion Power Cell Nanophosphate® Technology
ANR26650M1B, based on lithium iron phosphate chemistry (LiFePO4).
ANR26650M1B
Charging
Recommended charge current:
3 A Max continuous charge current: 10 A Max pulse charge current
(10s): 20 A
Float voltage:
3,45 V
Recommended charge V & cut-off current:
3,6 V, taper to 125 mA
Temperature range (reduce charging current to
250 mA when under 0 ºC):
0 ºC to 55 ºC
