Bidirectional cell channels
Each channel can source and sink current, supporting both active and passive balancing tests.
N83524 – Bidirectional Battery Cell Simulator with 24 Isolated Channels
For precise BMS, protection circuit and ATE testing of battery electronics and portable devices.
The N83524 series is a programmable multi-channel battery cell simulator for precise testing of BMS electronics, cell monitoring systems, battery protection circuits and portable devices. Its compact 19-inch format supports development, validation and automated production testing wherever multiple cell states must be generated and monitored reproducibly.
Isolated channel architecture
24 mutually isolated channels support multi-cell BMS and CMS testing as well as series connection.
SOC and SEQ profiles
Programmable SOC files and sequences reproduce defined cell states and time-dependent test procedures.
Remote control and cascading
LAN, RS232 and CAN plus dual LAN ports support automated systems and multi-unit control.
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ART. NO.
Description
Current [A]
Power [P]
Voltage [V]
N83524-06-01
|
Description
N83524-06-01 Bidirectional 24-channel battery simulator, 6 V/channel, ±1 A/channel, 6 W/channel, 3U
|
Current [A]
1
|
Power [P]
6
|
Voltage [V]
6
|
24 Channel Simulator
Technical Data
Design
Standard 19"
Height
3
Interfaces / Protocols
max. current per channel
max. power per channel
max. voltage per channel
Number of channels
24
Product category
Battery Cell Simulators
Type of Batterycellsimulator
Bidirectional
Fault Simulation
> 10 Channels
Uni-/Bidirectional
Bidirectional
N83524-06-03
|
Description
N83524-06-03 Bidirectional 24-channel battery simulator, 6 V/channel, ±3 A/channel, 18 W/channel, 3U
|
Current [A]
3
|
Power [P]
18
|
Voltage [V]
6
|
24 Channel Simulator
Technical Data
Design
Standard 19"
Height
3
Interfaces / Protocols
max. current per channel
max. power per channel
max. voltage per channel
Number of channels
24
Product category
Battery Cell Simulators
Type of Batterycellsimulator
Bidirectional
Fault Simulation
> 10 Channels
Uni-/Bidirectional
Bidirectional
N83524-06-05
|
Description
N83524-06-05 Bidirectional 24-channel battery simulator, 6 V/channel, ±5 A/channel, 30 W/channel, 3U
|
Current [A]
5
|
Power [P]
30
|
Voltage [V]
6
|
24 Channel Simulator
Technical Data
Design
Standard 19"
Height
3
Interfaces / Protocols
max. current per channel
max. power per channel
max. voltage per channel
Number of channels
24
Product category
Battery Cell Simulators
Type of Batterycellsimulator
Bidirectional
Fault Simulation
> 10 Channels
Uni-/Bidirectional
Bidirectional
N83524 battery cell simulator overview
The N83524 series is a programmable, bidirectional multi-channel battery cell simulator for BMS, CMS, protection-circuit and ATE testing. All three models provide 24 mutually isolated channels with a voltage range of 0 to 6 V per channel. Depending on the model, bidirectional currents of ±1 A, ±3 A or ±5 A and power ratings of 6 W, 18 W or 30 W per channel are available.
Each channel can operate as a precise cell-voltage source while simultaneously absorbing or delivering current. This enables charging and discharging conditions, active and passive balancing processes, and the behaviour of electronic components under different battery conditions to be investigated. The 19-inch instrument requires 3 U and combines local operation, programmable test sequences and remote control in one compact system.
Model selection: Voltage range and channel count are identical for all variants. The appropriate model is selected according to the required bidirectional current and power per channel.
Key benefits
Precise cell voltage
Setting and readback accuracy are specified at up to 0.6 mV at 23 ±5 °C. Cell voltages can be programmed and measured with 0.1 mV resolution.
Low-current measurement
An additional ±1 mA measurement range with 0.1 µA resolution supports the investigation of low quiescent currents and consumption values.
Low voltage noise
Voltage ripple of no more than 2 mV RMS supports stable supply conditions for sensitive BMS and protection-circuit electronics.
Fast settling
After a load step from 10% to 90%, the voltage returns to within 50 mV of the previous output voltage in less than 100 µs.
Four-wire connection
Separate output and sense lines compensate for voltage drops in the connection leads, with remote compensation up to 1 V.
Optional fault simulation
The optional NB108-2 unit provides short circuit, open positive or negative lead and reverse polarity simulation for all 24 channels.
Battery cell simulator operating principle
Provide cell voltage
In Source mode, the selected channel operates as a constant-voltage source. Input and output current can be limited separately, allowing the channel to supply current or absorb it from the DUT.
Reproduce cell behaviour
Battery and charging functions extend the programmed cell voltage with current limits, simulated internal resistance, capacity states and time-dependent voltage curves.
The bidirectional design reproduces both current directions of a real cell connection. When a simulated cell is discharged, the channel supplies current to the device under test. During charging, the channel absorbs current from the DUT. This is particularly relevant for active and passive balancing tests and for validation of charging, monitoring and protection functions.
Models and technical specifications
All models provide 24 channels and a voltage range of 0 to 6 V per channel. The variants differ in their maximum bidirectional channel current and the resulting power per channel.
| Model | Channels | Voltage per channel | Current per channel | Power per channel |
|---|---|---|---|---|
| N83524-06-01 | 24 | 0 to 6 V | ±1 A | 6 W |
| N83524-06-03 | 24 | 0 to 6 V | ±3 A | 18 W |
| N83524-06-05 | 24 | 0 to 6 V | ±5 A | 30 W |
Series-wide accuracy and measurement data
| Parameter | Value | Condition or note |
|---|---|---|
| Voltage setting | 0.1 mV resolution | Setting accuracy 0.6 mV at 23 ±5 °C |
| Voltage readback | 0.1 mV resolution | Readback accuracy 0.6 mV at 23 ±5 °C |
| Low current range | ±1 mA | 0.1 µA resolution and 1 µA setting and readback accuracy |
| Load regulation | 0.01% + 0.2 mV | Series-wide value |
| Channel-to-channel isolation | 500 V DC | Supports isolated cell channels and series connections |
| Communication response time | ≤10 ms | For the remote-control interfaces |
Dynamics and control behaviour
The dynamic data describe how quickly a programmed cell voltage is established or reduced and how the output stabilises after a load change. This is relevant for BMS inputs that detect and evaluate rapid current changes or switching processes within a cell group.
| Dynamic parameter | Value | Test condition |
|---|---|---|
| Voltage rise time | <40 µs | 10% to 90% of final value, no load and full resistive load |
| Voltage fall time | <100 µs | 90% to 10% of final value, no load and full resistive load |
| Transient voltage-drop depth | 350 mV | Load step from 10% to 90% at full output voltage |
| Transient settling time | <100 µs | Return to within 50 mV of the previous voltage |
| Voltage ripple | ≤2 mV RMS | Series-wide value |
Operating modes and programmable test functions
The N83524 series combines direct cell-voltage generation with predefined and programmable test procedures. Functions can be operated locally via the 4.3-inch colour display or through a remote-control interface.
| Function | Technical task | Typical use |
|---|---|---|
| Source | Constant-voltage operation with separately adjustable input and output current limits | Supplying and monitoring individual BMS or protection-circuit inputs |
| Charge | Simulation of charging and discharging processes with programmed voltage, current limits and internal resistance | Investigation of bidirectional current flow and charging functions |
| Battery | Voltage curve with start value, step size, end value, time interval and adjustable internal resistance | Repeatable voltage ramps and defined battery cycles |
| SOC Test | Up to 8 SOC files with a maximum of 200 steps each for voltage, capacity, current limits and internal resistance | Simulation of different states of charge and cell characteristics |
| SEQ Test | Up to 10 sequence files with a maximum of 200 steps, links, repetitions and step times up to 99.999 s | Automated functional, limit and sequence testing |
| Graph and All View | Real-time display of voltage for up to four selected channels and overview of all channel values and switching states | Local monitoring of multi-channel test procedures |
Typical applications
The N83524 battery cell simulator is designed for applications in which multiple precise cell voltages must be provided simultaneously and loaded in both current directions.
BMS and CMS testing for automotive and e-mobility
The simulator replaces individual battery cells and provides the control unit with up to 24 mutually isolated cell voltages for functional and balancing tests.
Active and passive balancing
Bidirectional channels supply or absorb balancing current and enable balancing algorithms to be tested at defined cell voltages.
Battery protection circuits
Programmable cell voltages, current limits and sequences support testing of monitoring, shutdown and protection functions in electronic battery boards.
Battery electronics for UAVs, drones and eVTOL aircraft
Multi-channel cell conditions can be reproduced for development and validation of monitoring and protection systems in compact flight and propulsion batteries.
Production and end-of-line testing
Remotely controlled channels, stored sequences and fast measurement readback enable repeatable testing of battery electronics in automated test systems.
Portable electronics and power tools
The simulator reproduces battery conditions for mobile devices, Bluetooth headphones, smartwatches, power tools, DC/DC converters and wireless-charging products.
Interfaces, software and automation
| Interface or function | Status | Technical description |
|---|---|---|
| LAN | Standard | Two LAN ports for PC remote control and connection of multiple instruments; UDP or TCP network operation is selectable. |
| RS232 | Standard | DB9 interface with selectable baud rates of 9,600, 19,200, 38,400, 57,600 and 115,200 baud. |
| CAN | Standard | CAN bus interface with adjustable baud rate, standard or extended ID addressing and cyclic transmission of voltage, current and power. |
| Application software | Standard | Manufacturer software for multi-channel operation, parameterisation and complex test environments. |
| Local operation | Standard | 4.3-inch colour display, function keys, numeric input and rotary encoder for channel selection and parameterisation. |
| Four-wire connection | Standard | Separate output and sense connections per channel compensate for voltage drops in the leads. |
| NB108-2 | Option | Fault simulation and nA current measurement; fault simulation is available only in Source mode. |
Channel connection and instrument cascading
The 24 channels are isolated from one another and can be connected in series to reproduce multi-cell battery systems. The isolation between two channels is 500 V DC. When multiple channels or instruments are connected in series, the total voltage must not exceed 1,500 V DC.
The two LAN ports allow multiple N83524 instruments to be connected to one computer and controlled remotely together. Unique IP addresses must be used when several instruments are connected.
Safety note: With N83524 instruments connected in series, all channels must be switched off before the mains supply is disconnected.
Installation and infrastructure
| Requirement | Technical specification |
|---|---|
| Mains connection | Single-phase, 100 to 240 V AC, 47 to 63 Hz |
| Mains current | ≤8 A at 220 V AC or ≤14 A at 110 V AC |
| Fuse | 250 V, 16 A, 20 × 5 mm ceramic fuse |
| Form factor | 19 inch, 3 U |
| Dimensions without option | 132.5 × 482.0 × 559.0 mm, height × width × depth including handle |
| Dimensions with NB108-2 | 132.5 × 482.0 × 725.9 mm, height × width × depth including handle |
| Weight | Approx. 17 kg, approx. 20 kg with NB108-2 |
| Operating temperature | 0 to 40 °C |
| Storage temperature | −20 to 60 °C |
| Environmental conditions | Altitude below 2,000 m, 5 to 90% relative humidity, non-condensing, 80 to 110 kPa |
| Cooling | Air cooling through the integrated air outlets |
The instrument must be reliably connected to protective earth before commissioning. A three-pole mains connection with protective contact must be used.
Protection and safety functions
Overvoltage protection
When triggered, the instrument limits the maximum output voltage, switches off the output immediately and displays the OVP status.
Overcurrent protection
The protection function monitors input and output current. If the limit is exceeded, the affected output is switched off and the OCP status is displayed.
Overpower protection
Exceeding the programmed power threshold causes immediate output shutdown and display of the OPP status.
The mains supply must be disconnected before connecting, rewiring, replacing the fuse or installing the optional fault-simulation unit.
N83524 series FAQ
Which N83524 model is suitable for my application?
All variants provide 24 channels and 0 to 6 V per channel. Selection is based on the required current: ±1 A, ±3 A or ±5 A per channel.
Can each channel supply and absorb current?
Yes. The channels are bidirectional and can either output or absorb current depending on the connected device under test.
Are the 24 channels isolated from one another?
Yes. The channel-to-channel isolation is 500 V DC. This supports multi-cell BMS setups and series connections.
Which SOC and sequence functions are available?
Up to 8 SOC files and 10 SEQ files can be stored. Each file supports a maximum of 200 programmable steps.
Which interfaces are provided as standard?
LAN with two network ports, RS232 and CAN are integrated as standard. Application software for remote operation is also available.
Can the instrument measure low quiescent currents?
The low-current range extends from −1 to +1 mA and provides 0.1 µA resolution with an accuracy of 1 µA.
Which faults can be simulated with the NB108-2 option?
The option supports short circuit, open positive or negative terminal and reverse polarity. The function is available only in Source mode.
Is the series suitable for automated production testing?
Yes. Remotely controlled channels, stored procedures, LAN, RS232 and CAN support integration into ATE and end-of-line test systems.
Technical consultation and project enquiry
Are you planning a BMS test bench, automated protection-circuit testing or multi-channel battery simulation? ET System supports you in selecting the appropriate N83524 variant, configuring channel connections, integrating interfaces and implementing optional fault simulation.
Send us the required channel count, cell voltage, maximum charging and discharging current and information about your test procedure.
Request technical project consultation