Li-Ion BMS

Li-Ion BMS options

A comparison of commercially available Li-Ion BMSs

These tables compare Li-Ion BMSs available on the market today.
This information does not constitute an endorsement of any of these companies and products.
While the information presented here is believed to be accurate, Elithion takes no responsibility for any errors.
Please send us comments, corrections and additions.
Spreadsheet of BMSs

back to topParametric BMS selector

Go to the Parametric BMS selector utility.

back to topBMS types

This table explains the difference between digital and analog BMSs, and between Protectors, Balancers, Monitors, Displays and Regulators.
Reports individual cell voltages Balances the battery Requests that battery be switched off Includes switch to turn off battery
Digital:
knows where
the problem is
and by how much
Protector
Balancer
Monitor
Meter
Analog:
knows there's
a problem,
but doesn't know
where and
by how much
Protector
Balancer
Monitor
Regulator

back to topPrices
Digital BMSs anchor
Price vs number of cells
Digital Protectors and Balancers
Note: log scales. Sources: (15)
Analog BMSs anchor
Price vs number of cells
Protectors (thin line), Balancers (thick line).
Note: log scales. Sources: (15)
back to topDigital protectors

Sophisticated digital technology, able to measure and report every cell voltage, to balance the battery pack, and to cut-off the battery current.

To see additional information, hover your cursor over the more info icons.
Company
(1)
Picture
(2)
Model Topology
(3)
No of cells
(4)
Cell shape
(5)
Current Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Comm.
(10)
Displ.
(13)
Case
(14)
Chargery
China
GuangDong
Click to see the BMS B series Wired,
Centralized
1~12
more info
Any - - - -
more info
Metal
Clayton power
UK
coffin No longer selling off-the-shelf BMSs; custom BMS only
e-chip coffin No longer selling BMSs
Emus
(Formerly Elektromotus)
Gintautas Paluckas
Lithuania
Click to see the BMS BMS Mini Wired,
Centralized
6~16 Any 45 A cont. / 100 A pk. 5 CAN (CANOpen), LIN, RS-232, Bluetooth GUI Plastic

Energus
Lithuania
Click to see the BMS S516 Wired,
Centralized
5~16 Any 60 A cont. / 150 A pk.
or
600 A cont. / 750 A pk

more info
USART (USB / Bluetooth) CycleAnalyst
GUI (Android)
Open board
Hunan group control energy technology Co., Ltd. (GCE)
China
Click to see the BMS 12S-16S BMU Wired,
Centralized
12~16 Any ? - CAN - Enclosed
Click to see the BMS 17S-24S BMU Wired,
Centralized
? Any ? - CAN - Enclosed
Click to see the BMS ? Wired,
Centralized
RBMS07S-60S50A Any 50, 100 - CAN, RS-485 - Open asm
Click to see the BMS RBMS07S-60S50A Wired,
Centralized
65~75 Any 50, 100 - CAN, RS-485 - Open asm
Click to see the BMS ? Wired,
Centralized
?
more info
Any 600 ? ? - ? - 5U rack mount
Click to see the BMS ? Wired,
Centralized
?
more info
Any ? ? ? - ? - 4U rack mount
Green Eco
India
Click to see the BMS Smart BMS Wired,
Centralized
5~32 Any 50 A RS-232, RS-485, CAN Open board
JTT
Vancouver, BC
Canada
Click to see the BMS P-Series Wired,
Centralized
5~13 Any 25 A Open board
Click to see the BMS T-Series Wired,
Master/slave
4~240 Any 1 / 4 cells 300 A
more info
RS485, RS232
more info
GUI Metal
Lithium Balance
Denmark
coffin No longer selling protector BMSs
Lithium Start coffin No longer selling BMSs
RoboteQ
US
Arizona
Click to see the BMS BMS1040 /
BMS1060
Wired,
Centralized
6~10 /
11~15
Any 100 A 3 CAN (CANopen), RS485, USB
more info
-
more info
?
Ventec
France
coffinOut of business
Company
(1)
Picture
(2)
Model Topology
(3)
No of cells
(4)
Cell shape
(5)
Current Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Comm.
(10)
Displ.
(13)
Case
(14)

back to topDigital balancers

Sophisticated digital technology, able to measure and report every cell voltage, to calculate SOC, to balance the battery pack, and to request that the battery current be shut off to protect it. Does not include a switch to cut off the battery current.

Price vs number of cells

Note: log scales. Sources: (15)

To see additional information, hover your cursor over the more info icons.
Company
(1)
Picture
(2)
Model Topology
(3)
No of cells
(4)
Cell shape
(5)
Balance
current
Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Isol. detect Comm.
(10)
Fan
drive
(11)
Contac.
drive
(12)
Displ.
(13)
Case
(14)
123 Electric
The Netherlands
Click to see the BMS 123SmartBMS Distributed
more info
1~255 Prismatic 1 A Bluetooth
more info
-
more info
-
more info
-
Ashwoods Energy Limited
UK
coffin Out of business
Balancell
South Africa
coffin No longer selling BMSs
Batrium
NSW
Australia
Click to see the BMS WatchMon Distributed
more info
1~249 Prismatic
/ Large cylindrical
0~2 A CAN
WiFi
USB
- - - -
BatteryMan coffin Out of business
Black Sheep Technology coffin No longer selling BMSs
Clayton power coffin No longer selling off-the-shelf BMSs; custom BMS only
Convert the future coffin Out of business
Eberspaecher coffin Out of business
Emus
(Formerly Elektromotus)
Gintautas Paluckas
Lithuania
Click to see the BMS EMUS BMS Distributed 4~256
more info
Prismatic 1.3 A
more info

more info
- Wire
CAN
USB
RS232

more info
- Avail.
GUI
Metal
Company
(1)
Picture
(2)
Model Topology
(3)
No of cells
(4)
Cell shape
(5)
Balance
current
Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Isol. detect Comm.
(10)
Fan
drive
(11)
Contac.
drive
(12)
Displ.
(13)
Case
(14)
Elithion
Davide Andrea
US
Colorado
Click to see the BMS Lithiumate™ Pro Distributed 2~255 Sml cyl
Lrg cyl
Prism.
Pouch
0.2 A /
3 A
more info
1 / cell
more info
Wire
CAN
RS232
Avail.
GUI
Metal
more info
Click to see the BMS Lithiumate™ HD Distributed 2~200 Sml cyl
Lrg cyl
Prism.
Pouch
0.2 A /
3 A
more info
1 / cell
more info
Wire
CAN
RS232
Avail.
GUI
Sealed composite
Click to see the BMS Vinci EV Master/slave
wired or distrib.
2~1000 Any 0.1 A 1/cell 1000 A
more info
Wire
CAN
USB
GUI Sealed composite
Click to see the BMS Vinci HV Master/slave
wired or distrib.
2~1000 Any 0.1 A 1/cell 1000 A
more info
Wire
CAN
USB
Modbus RS485
Ethernet
GUI Sealed composite
Click to see the BMS Vinci LV Centralized
wired
2~16
60 batts in par.
Any 0.1 A /
3 A
more info
3 1000 A
more info
Wire
CAN
USB
Modbus RS485
Ethernet
WiFi
RS232

MOSFET
GUI Sealed composite
Company
(1)
Picture
(2)
Model Topology
(3)
No of cells
(4)
Cell shape
(5)
Balance
current
Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Isol. detect Comm.
(10)
Fan
drive
(11)
Contac.
drive
(12)
Displ.
(13)
Case
(14)
Elecyr coffin No longer selling BMSs
Evaira coffin Out of business
E-Pow
(Huizhou EPower Electronics)
coffin Out of business
EVLithium
(Norway) (Not to be confused by the Chinese reseller by the same name.)
coffin Out of business
EVPST
China
Guangzhou
Click to see the BMS BMS-4 Wired,
Master/slave
??? Any - CAN
RS485
- - Metal
Ewert Energy Systems
Chris Ewer
US
Illinois
Click to see the BMS Orion™ Wired,
Centralized
1~180 Any
more info
Wire
CAN
- GUI Metal
Click to see the BMS Orion JR Wired,
Centralized
16 Any - Wire
more info
- - Plastic
Flux Power coffin No longer selling BMSs
Freemens
France
coffin Sold designs to Ion Energy, India
Company
(1)
Picture
(2)
Model Topology
(3)
No of cells
(4)
Cell shape
(5)
Balance
current
Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Isol. detect Comm.
(10)
Fan
drive
(11)
Contac.
drive
(12)
Displ.
(13)
Case
(14)
Gannon
USA
coffin Out of business
GfE/GK-Anlagentechnik coffin No longer selling BMSs
Guantuo
China
Heilongjiang
coffin Seems to be out of business
GWL Power
Czech Republic
EU
coffin No longer offering their own BMS; now reselling BMS123 Smart from 123 Electric
I + ME ACTIA
Germany
Click to see the BMS IME Wired,
Master/slave
140 max
more info
Any - CAN
RS232
- - - -
ION Energy
Mumbai, India
(Very slow loading site)
Click to see the BMS FS-XT (Bought tech from Freemens, France) Wired,
Master/slave
192 max
more info
Any 420 mA 4/board - CAN
Bluetooth
- - -
JTT
Vancouver, BC
Canada
Click to see the BMS S-Series Wired,
Centralized
4~48 Any 0.3 A 1 / cell 300 A
more info
- CAN, RS232
more info
GUI Metal
Click to see the BMS X-Series Wired,
Master/slave
2~240
more info
Any 0.3 A
more info
2/slave 300 A
more info
2 x CAN
more info
GUI Metal
Jon Elis
Lithuania
EU
coffin Out of business
Company
(1)
Picture
(2)
Model Topology
(3)
No of cells
(4)
Cell shape
(5)
Balance
current
Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Isol. detect Comm.
(10)
Fan
drive
(11)
Contac.
drive
(12)
Displ.
(13)
Case
(14)
Ligoo
Anhui Wicom New Energy Technology
coffin Out of business
Lithium Balance
Denmark
Click to see the BMS LiBAL sBMS
more info
Wired,
Master/slave
more info
256 Any CAN (CANopen)
wire
- - - Metal
more info
Click to see the BMS LiBAL sBMS 9-16 Wired,
Master/slave
more info
16 Any CAN
wire
- - - -
more info
Manzanita Micro
Rich Rudman
US
Washington
coffin No longer offering a BMU
Methods
Patrick Schindler
US
California
Click to see the BMS LTC BMS
more info
Wired,
Centralized
36
more info
Any - Wire
USB
- - - Aluminum
Millen Works coffin Out of business
Movicom Electric

Russia
Click to see the BMS Movicom BMS WiredMaster/slave 256
more info
Any 0.35 A
more info
1/cell Hall Effect - CAN (CANopen), Wifi, MODbus - GUI, LCD, beeper -
Nuvation
US
California
Click to see the BMS Low voltage Wired,
Centralized
?~16 Any 8 total Modbus TCP, Modbus RTU, CAN Plastic
Click to see the BMS High voltage Wired,
Master slave
Many
more info
Any 300 mA 8 / slave Modbus TCP, Modbus RTU, CAN Metal
Company
(1)
Picture
(2)
Model Topology
(3)
No of cells
(4)
Cell shape
(5)
Balance
current
Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Isol. detect Comm.
(10)
Fan
drive
(11)
Contac.
drive
(12)
Displ.
(13)
Case
(14)
O'Cell Technology
China, Shenzhen
coffinNo longer selling BMSs
Pacific EV coffin Out of business
Peter Perkins
UK
Click to see the BMS V series
more info
Distributed or
Wired,
Master/slave
more info
1~255
more info
Prismatic - Wire
RS232
- - Included -
more info
Prohelion
Australia
Click to see the BMS IQ System
(Formerly from Tritium)
Master Slave
more info
256
more info
Any 0.25 A
more info

more info
- CAN - -
REC
Slovenia
EU
Click to see the BMS BMS Master/Slave
more info
240 Any 1.3 A ✓:
380 A
- CAN, RS485 GUI Metal
more info
Click to see the BMS Q16S Centralized 16 CAN, RS-485 Metal
Click to see the BMS Active Centralized 4 Any 2 A
more info

more info
CAN, RS485 Metal
Shanghai Founding New Energy Technology
/ Leoyun New Energy
China

Resold by EVlithium (China)
Click to see the BMS EBS-BMS.24S Centralized 4~24
for bike
Any Metal
STW and Fraunhofer IVI

Germany / USA
Click to see the BMS mBMS WiredMaster/slave 8~300 Any 0.16 A 800 A
Shunt
- CAN (CANopen) GUI -
KLClear
China
coffin No longer selling BMSs
Tritium coffin No longer selling BMSs
REAP systems coffin No longer selling BMSs
Ventec coffin No longer selling BMSs
Volrad
Ankara
Turkey
Click to see the BMS V-BMS Wired,
Master-slave
3-600
more info
Any 1 A
more info
2 3200 A
more info
- CAN
RS-485
USB
WiFi, BlueTooth
-
more info
GUI Metal
Zeva
Ian Hooper
West Australia
Australia
coffin No longer accepting orders. Engineering files released to the public.
Company
(1)
Picture
(2)
Model Topology
(3)
No of cells
(4)
Cell shape
(5)
Balance
current
Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Isol. detect Comm.
(10)
Fan
drive
(11)
Contac.
drive
(12)
Displ.
(13)
Case
(14)

back to topDigital monitors

Sophisticated digital technology, able to measure and report every cell voltage, to calculate SOC, and to request that the battery current be shut off to protect it. Not able to balance the battery pack.

To see additional information, hover your cursor over the more info icons.
Company
(1)
Picture
(2)
Model Topology
(3)
No of cells
(4)
Cell shape
(5)
Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Comm.
(10)
Fan
drive
(11)
Contac.
drive
(12)
Displ.
(13)
Case
(14)
All New Energy
Distributed by Lithium Batteries Australia (LBA) / Battery Manufacturer's International (BMI) / LifeBatt
Taiwan
Click to see the BMS VMS / GBTS Wired,
Modular
1~24
more info
Any -
more info
Wire
serial
more info
- - - -
more info
Electric Blue Motors coffin Out of business
Guantuo coffin No longer selling monitor BMSs
Manzanita Micro
Rich Rudman
US
Washington
Click to see the BMS MK3x4SMT regulator Wired,
Master/slave
Any
more info
Any - - - - - - -
Company
(1)
Picture
(2)
Model Topology
(3)
No of cells
(4)
Cell shape
(5)
Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Comm.
(10)
Fan
drive
(11)
Contac.
drive
(12)
Displ.
(13)
Case
(14)
LEM
Switzerland
coffin No longer offering a BMS
Lithium Start coffin No longer selling BMSs
Rozwiazania dla EV
("Solutions for EV")
Poland
No website
Click to see the BMS iBMS
more info
Wired,
Master/slave
more info
4~24
more info
Any
more info

more info
Wire
more info
RS485
- -
more info
-
Shenzhen Junsi Electronic Co
Shenzhen, China
Click to see the BMS S8 Wired,
Centralized
2~8 Any - - - USB
Wire
- - Plastic
Worley Parsons coffin No longer selling BMSs
Company
(1)
Picture
(2)
Model Topology
(3)
No of cells
(4)
Cell shape
(5)
Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Comm.
(10)
Fan
drive
(11)
Contac.
drive
(12)
Displ.
(13)
Case
(14)

back to topDigital meters

Sophisticated digital technology, able to measure and report every cell voltage. Not able to balance the battery pack; does not protect the battery (does not request that the battery current be shut off).

To see additional information, hover your cursor over the more info icons.
Company
(1)
Picture
(2)
Model Topology
(3)
No of cells
(4)
Cell shape
(5)
Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Comm.
(10)
Fan
drive
(11)
Contac.
drive
(12)
Displ.
(13)
Case
(14)
CasaDelGato coffin No longer selling BMSs
Ken Hall coffin No longer selling BMSs

back to topAnalog protectors (PCM)

  • A protection circuit is a BMS that also includes a way to interrupt the battery current to protect the battery (unlike a protection circuit, a standard BMS must rely on external devices (charger, motor controller, contactors) to reduce or stop the battery current when the BMS tells them to)
  • Protection circuits usually are meant for small batteries (cell phones, laptops) as they can usually only handle a few Amps of battery current

Sources of commercially available circuit protectors for small Li-Ion batteries:

back to topAnalog balancers

Simple analog technology, just able to detect that some cell's voltage is too low or too high, but unable to report which one. Able to balance the battery.

To see additional information, hover your cursor over the more info icons.
Company
(1)
Picture
(2)
Topology
(3)
No of cells
(4)
Cell shape
(5)
Balan.
(6)
Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Comm.
(10)
Displ.
(13)
Case
(14)
Price,
14-cell
[US$]
(15) http://www.saiettaengineering.com/
Agni motors coffin Out of business
Black Sheep Technology coffin No longer selling BMSs
Belktronix
Bryan Belk
US
California
Click to see the BMS Distributed 1~44 Any
more info
- - - Wire - - ?
Clean Power coffin No longer selling BMSs
Company
(1)
Picture
(2)
Topology
(3)
No of cells
(4)
Cell shape
(5)
Balan.
(6)
Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Comm.
(10)
Displ.
(13)
Case
(14)
Price,
14-cell
[US$]
(15)
EV Power
Rod Dilkes
Australia
W. Aus.
Click to see the BMS Distributed 1~any Prismatic - - - Wire -
more info
Metal
more info
186
EV Works
Rod Dilkes
Australia
W. Aus.
Click to see the BMS Centralized 8 Any - - - Wire - -
LiPoTech
Francesco Tosoni
San Marino
(Italy)
Click to see the BMS Distributed
more info
1~any Any
more info
- - - Wire
more info
-
more info
- € 40 /
4-cells
Low Carbon Idea
China
coffinOut of business
High Tech Systems
Derek Barger
US
Colorado
coffin No longer offering a BMS
Company
(1)
Picture
(2)
Topology
(3)
No of cells
(4)
Cell shape
(5)
Balan.
(6)
Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Comm.
(10)
Displ.
(13)
Case
(14)
Price,
14-cell
[US$]
(15)

back to topAnalog monitors

Simple analog technology, just able to detect that some cell's voltage is too low or too high, but unable to report which one nor to balance the battery.

To see additional information, hover your cursor over the more info icons.
Company
(1)
Model Picture
(2)
Topology
(3)
No of cells
(4)
Cell shape
(5)
Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Comm.
(10)
Displ.
(13)
Case
(14)
Price
[US$]
(15)
Thunderstruck
US, CA
BMS-X Click to see the BMS Distributed Any Prismatic
M8 bolt only
- - - Wire
more info
- - $ 150 + $ 15 / cell

back to topRegulators / equalizers / balancers

Regulators (also called "equalizers" or "balancers") are sometimes used in Li-Ion packs as a simple protection against overcharging. A regulator is required across each cell.

A regulator performs balancing during charging by bypassing charging current from the fully charged cells, so that other cells in the battery can finish charging.

balance on cell
Elite Power Solutions Battery Balancer.

What regulators do:

  • Regulator remove excess energy from cells whose voltage is above a certain threshold, but that's all they do

What regulators don't do:

  • Regulator can't keep individual cells in a battery from overcharging
  • Regulator don't monitor the entire battery, and don't report on its status
  • Regulators do not protect a pack from undercharging
  • Regulators are not able to tell the charger to stop charging: a human has to keep an eye on the regulators (which usually have LEDs) and shut down the charger
  • Regulators cannot not tell external devices to slow down or stop charging or discharging; therefore, a pack with regulators can still be under-charged, and overcharging may damage the regulators
  • Regulators can't protect themselves from overheat: they will be damaged if a CCCV charger's end current is higher than the regulators can bypass

EXCEPTION: The EV West bottom balancer actually does things the other way around:

  • Instead of top balancing, it bottom balances: it removes energy from a cell until it's empty
  • Instead of being permanently mounted on a cell, it is used only once, at manufacture, to empty a single cell at a time
  • Instead of being installed in addition to a non-balancing BMS, this bottom balancer is intended to be used without any BMS at all

Sources of commercially available regulators for Li-Ion cells:

  • Linano - Prismatic cell - Europe
  • CBM1 - Cell Balancing Module - 3.60V- 1.7A - Europe
  • Hot Juice Electric - US - Texas. No longer made.
  • Elite Power Solutions Battery Balancer sold by Electric Blue Motors - regulator for a single LiFePO4 prismatic cell
    • For 90 Ah prismatic cells
    • Probably on the order of 200 mA balance current
    • Fixed 3.7 V voltage
      • Not ideal for LiFePO4 cells: the shunt voltage is a bit too high
      • Won't work with Thundersky cells: the shunt voltage is too low
      • Won't allow LiPo and cobalt lithium cells charge fully: the shunt voltage is too low
    • $ 13 each
  • Bat Guard, by LL Labs (no website), sold by Anida in Dallas, TX, US
    • High power regulator: 4 A max current
      • While shunting, a yellow LED is lit.
      • If the fuse blows, a red LED will light, but cell will soon be toast, so a human has to watch the LEDs at all times
    • Fixed 3.67 V knee voltage, 3.7 V max voltage
      • Not ideal for LiFePO4 cells: the shunt voltage is a bit too high
      • Won't work with Thundersky cells: the shunt voltage is too low
      • Won't allow LiPo and cobalt lithium cells charge fully: the shunt voltage is too low
    • Between $ 40 to $ 60 each, depending on quantity
back to topNotes
  1. Company: Trade names are the property of their respective owners. A few other companies are getting ready to offer Li-Ion BMSs, but are not yet ready to be listed here (for example, Evie Systems).
  2. Picture:
    • Click to see the complete picture (if available)
  3. Topology (more info):
    • BMS: does not include a switch to cut off the battery current
    • Protector: includes a switch to cut off the battery current
    • Centralized ("spaghetti"): single BMS controller with n+1 wires going to n cells
    • Centralized with slaves: single BMS controller connected to a few slave boards, each with n+1 wires going to n cells
    • Modular: single BMS controller with n+1 wires going to n cells; expanded by adding more, identical BMS controllers
    • Distributed: small board mounted on each cell; BMS controller connected just to the 2 cells at either end of a battery
  4. Number of cells: this is the acceptable range in the number of cells in series. The number of cells in parallel does not matter.
  5. Cell shape:
    • Small cylindrical: cylindrical cells to be welded, such as the 18650 or the 26650 sizes
    • Large cylindrical: cylindrical cells with screw terminations at either end
    • Prismatic: boxy cells with screw terminations on top, such as Thundersky
    • Pouch: soft bags with tabs on one end, such as Kokam
    • Any: there are no electronics on the cells, so the BMS works with all the above, using wires
  6. Balance: The BMS is able to remove energy just from the most charged cells, to allow the other cells to reach the same level of charge. A balanced pack will have the maximum possible capacity. This is not as important for Hybrid Electric Vehicles.
  7. Temperature: The BMS is able to measure and report individual cells' temperature. (The 'more info' tells you if the temperature measurement is not for every cell.)
  8. Current sense: The BMS includes a current sensor or at least an input for a current sensor, to measure battery current. This enables the BMS to react to excessive current, and to calculate the SOS or DOD.
  9. "Fuel gauge": a.k.a.: "Gas Gauge". The BMS calculates the SOC (State Of Charge) or DOD (Depth Of Discharge), by integrating the battery current. Devices that simply use the voltage to estimate SOC are not included here.
  10. Communications: In general, the BMS must communicate with the rest of the system, to report the status of the pack, and be able to limit charging and discharging of the pack, in order to protect it.
    • Wire: separate wires are used, each with a single, specific function, such as to turn on the charger relay.
    • CAN: CAN bus, common in vehicles and European industrial equipment.
    • RS232: serial point-to-point communication, usually used only for initial set-up and testing, but some time also available for communication during operation.
  11. Fan: The BMS is able to control or drive a cooling system
  12. Contactors: The BMS is able to control or drive a set of contactors between the battery pack and the load, including a precharge relay. Many motor controllers already have this function built in, so BMS controller that includes this function is not required.
  13. Display: Either the BMS includes a SOC display, or the company sells a display that is compatible with the BMS.
  14. Case: Whether the BMS controller is enclosed (metal or plastic case), or it is an open PCB assembly. Unless otherwise noted, any cell-mounted boards are assumed to be open PCB assemblies.
  15. Price: from manufacturers' websites or discussion with them or their clients. Conversions into US $ based on rates effective at the time of writing. Unless otherwise noted, prices are for small quantities.
back to topCustom BMSs

Companies that offer custom BMS designs:

back to topDIY BMSs

Some open source, DIY BMS projects:

back to topCell manufacturer BMSs

BMSs from cell manufacturers, only sold together with their cells. Therefore, these BMS are not considered to be commercially available. They are presented here only for reference

To see additional information, hover your cursor over the more info icons.
Cell company
(1)
BMS company
(1)
Picture Model Topology
(3)
Function No of cells
(4)
Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Comm.
(10)
Fan
drive
(11)
Contac.
drive
(12)
Displ.
(13)
Case
(14)
Price
Elite Power EPS Click to see the BMS BMS System Distributed Digital balancer 200 Wire - - Plastic $370 / 16 cells
$470 / 24 cells
$1425 / 100 cells
more info
Thundersky Ningbo Yangming
(no link: attack website)
Click to see the BMS BMS40 Wired,
Master/slave
Digital monitor 10,20,
30...100

more info
? ? Incl.
more info
Metal
Valence coffin Out of business
Cell company
(1)
BMS company
(1)
Picture Model Topology
(3)
Function No of cells
(4)
Temper.
(7)
Curr.
sense
(8)
"Fuel
gauge"
(9)
Comm.
(10)
Fan
drive
(11)
Contac.
drive
(12)
Displ.
(13)
Case
(14)
Price

Also.

  • Frazer-nash - Out of business
  • KJohnson Matthey
  • Ash Woods Energy - Out of business
  • Vintage Voltage's EVView, Charlie Malone - Out of business
back to topOther

The following are not BMSs, but perform related functions.

  • Cycle Analyst, battery meter for electric bikes
  • EV-Display - Out of business
  • Shenzhen Junsi Electronic Co - Out of business

© 2008~2024 Davide Andrea. All rights reserved, except where noted by CC mark. Page published on May 06 2022. Graphic design by morninglori
 

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