Energus Power Solutions Ltd.

Datasheet
Tiny BMS s516 – 30A / 150A / 750A

Revision A, 2018-07-30
 Energus Power Solutions Ltd. Tiny BMS Datasheet

INTRODUCTION FEATURES
BMS, or Battery Management System, is an • Integrated 150 A power switches
essential component of every Lithium battery. • Supports 12 V to 60 V systems (4s-16s), all
Energus PS Tiny BMS supports lithium batteries of lithium chemistries
any chemistry and up to 60 V nominal. Battery • All parameters are adjustable: voltage,
capacity from sub-1 Ah to 655 Ah can be managed current, temperature
easily. • Supporting up to two external temperature
sensors and one dual-range current sensor
Tiny BMS measures individual voltages of parallel
• Dissipative balancing up to 150 mA
cell groups and manages switching of load and
charger. During charging, cells are balanced by
• Connectivity: UART, MODBUS, CAN and
Bluetooth
bleeding-off higher cells to accomplish full balance
and maintain good health of battery pack.
• Event Log, Usage Statistics
• Free firmware upgrades
State-of-Charge is calculated as well, and is • Programmable Inputs & Outputs
available via communication bus to be displayed for • Ultra-compact design: 95x65x9 mm
user.

SAFETY APPLICATIONS
Various safety mechanisms are built in: • Industrial equipment, robotics
disconnection of load or charger if any of the cells • Stationary solar & wind storage
go out of allowed range of voltage or current, also • Personal transportation
up to two temperature points are measured and can
be used for emergency disconnect or for disabling
of charging if cell temperature is too low.

FLEXIBILITY
User-upgradeable firmware allows quick updates,
bringing bugfixes, new features and other
improvements, such as client-specific functionality.
Integrated communication bus allows easy
reconfiguration and streaming of real time data,
while extension I/Os enables operation with various
external peripherals: current sensors, contactors,
Enable switches, SOC gauges and more.

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ELECTRICAL CHARACTERISTICS
Table 1: Product characteristics (all parameters rated at 25 °C if not specified otherwise)
Parameter Comment Min. Typ. Max. Unit
Battery voltage Operation range 9.0 - 75 V
Cell voltage Measurement range 0.8 - 4.5 V
Continuous ±0.8 - ±50 A
Mounted on cool surface ±0.8 - ±60 A
Discharge/Regen current
(150 A high power BMS version) Peak (<10 sec.) ±0.8 - ±150 A
With external relay / contactor and
±0.8 - ±750 A
current sensor
Continuous 0.8 - 30 A
Charge current
(150 A high power BMS version) With external relay / contactor and 0.8 - 750 A
current sensor
Discharge/Regen current Continuous ±0.08 - ±30 A
(30 A low power BMS version) Peak ±0.08 - ±60 A
Charge current Continuous 0.08 - 20 A
(30 A low power BMS version) Peak 0.08 - 30 A
Balancing current Per cell, Ucell=4.2V - 100 150 mA
Expansion I/O current Long term - - 250 mA
ADC range 0 - 75.0 V
Expansion I/O voltage Logic 1 3.0 5.0 75.0 V
Logic 0 0 0 1.5 V
Without cooling plate - 95x65x9 - mm
Dimensions
With cooling plate - 113x65x11 - mm

Current consumption in active state (charging, discharging or communicating)

7.0
Consumed current from B+ (mA)

6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
15 20 25 30 35 40 45 50 55 60 65
Battery pack voltage (V)

Figure 1: Current consumption from battery pack (+) in active mode (low power 30 A BMS version)

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 Energus Power Solutions Ltd. Tiny BMS Datasheet

12.0

Consumed current from B+ (mA)

11.0
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
15 20 25 30 35 40 45 50 55 60 65
Battery pack voltage (V)

Figure 2: Current consumption from battery pack (+) in active mode (high power 150 A BMS version)

Current consumption in sleep mode

95
Consumed current from B+ (μA)A)

90

85

80

75

70
15 20 25 30 35 40 45 50 55 60 65
Battery pack voltage (V)

Figure 3: Current consumption from battery pack (+) in sleep mode. Ignition enabled or load disabled due
fault condition

250
Consumed current from B+ (μA)A)

240
230
220
210
200
190
180
170
160
15 20 25 30 35 40 45 50 55 60 65
Battery pack voltage (V)

Figure 4: Current consumption from battery pack (+) in sleep mode. Ignition disabled (low power 30 A
BMS version)

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 Energus Power Solutions Ltd. Tiny BMS Datasheet

430
Consumed current from B+ (μA)A)

410
390
370
350
330
310
290
270
250
15 20 25 30 35 40 45 50 55 60 65
Battery pack voltage (V)

Figure 5: Current consumption from battery pack (+) in sleep mode. Ignition disabled (high power 150 A
BMS version, internal current sensor)

700
Consumed current from B+ (μA)A)

650
600
550
500
450
400
350
300
15 20 25 30 35 40 45 50 55 60 65
Battery pack voltage (V)

Figure 6: Current consumption from battery pack (+) in sleep mode. Ignition disabled (high power 150 A
BMS version, external current sensor)

Note: These are measured approx Tiny BMS device current consumption values. Real current
consumption may insignificantly differ from values presented above due to firmware version, BMS fault
state, enabled features, wiring setup etc.

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 Energus Power Solutions Ltd. Tiny BMS Datasheet

MECHANICAL DATA
105

57
65

2
11

Figure 7: Mechanical dimensions (in mm) of the high power 150 A BMS module

95
65
9

Figure 8: Mechanical dimensions (in mm) of the low power 30 A BMS module

Note: A simplified STP model is available upon request.

Note: For best results of high current handling with integrated switches, mount the Tiny BMS device on
cool metal surface, such as enclosure of battery box.

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 Energus Power Solutions Ltd. Tiny BMS Datasheet

Document revision history

Revision Date Description
A 2018-07-30 Initial release.

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