Visteon SLA12 Sense Line Electronic Module User Manual
- June 12, 2024
- Visteon
Table of Contents
Visteon SLA12 Sense Line Electronic Module
Product Information
- Model Name: SLA12
- Type of product: Sense Line Assembly
- Brand Name: Visteon
- Manufacturer: Visteon Corporation
- Manufacturer Address: One Village center drive, Van Buren Township, 48111-5711 Michigan, United States of America
- The SLA12 (Sense Line Assembly) is an electronic module manufactured by Visteon Corporation. It is designed to monitor battery module cell groups voltages and module temperatures from the High Voltage battery bus. The SLA12 also activates cell balancing to improve battery cell life. It utilizes a Cell Monitoring Unit (CMU) board with a Pinnacle IC (ADRF8800) for wireless communication between the Battery Cell Monitoring chip and the Battery Management System Controller. The SLA12 operates in the frequency range of 2.405 GHz – 2.480 GHz (ISM band) using Wireless battery management technology.
- The SLA12 can send 3 packets per 100ms and 3 packets of health reports every minute. With a path stability of 81%, it can transmit approximately 37.0987 times per second. The maximum transmission length is 1.016 ms, resulting in a duty cycle of 3.7%. Please note that the 27% duty cycle belongs to the Dual BRFM (FCC ID: NT8-BRFM/IC: 3043A-BRFM).
- The SLA12 has various system interactions including analog input, digital input, analog output, communication bus, RF link(s), and switching clock frequency content. It also has a module-to-vehicle electrical interface where the battery module provides voltage to the SLA12. The power nominal value is 43.8 V, with a minimum voltage of 26.4 V and a maximum voltage of 52.8 V. The SLA12 utilizes NTC1, NTC2, and NTC3 thermistors from ICB.
- The SLA12 does not have a user interface and certain internal I/O monitoring should only occur via communication bus data or indirect methods. Direct monitoring using attachments or external monitoring devices is not recommended.
- In terms of compliance, the device complies with Part 15 of the FCC Rules and must not cause harmful interference. It also complies with FCC RF exposure limits and has been evaluated under portable exposure conditions. The equipment must be installed and operated with a minimum distance of 3.69 cm from the human body to ensure compliance through normal use of the vehicle.
Product Usage Instructions
- Connect the SLA12 module to the High Voltage battery bus according to the provided electrical interface specifications.
- Ensure that the battery module provides a voltage within the range of 26.4 V to 52.8 V to power the SLA12.
- Position the SLA12 module in a suitable location within the vehicle, ensuring it is securely mounted and protected from excessive heat or moisture.
- Activate the SLA12 by providing power to the module.
- The SLA12 will automatically start monitoring battery module cell group voltages and module temperatures via wireless communication through the BRFM.
- Monitor the cell voltages and module temperatures reported by the SLA12 on a regular periodic basis using the VICM3 or any compatible monitoring device.
- If necessary, activate cell balancing to improve battery cell life by following the instructions provided by the Battery Management System Controller.
- Adhere to the duty cycle specifications of the SLA12 to ensure optimal performance and transmission frequency.
- Ensure compliance with FCC regulations regarding radio waves emission by maintaining a maximum output power of 10 dBm (U.S.A. and Canada).
- Follow all safety guidelines and maintain a minimum distance of 3.69 cm between the SLA12 and the human body to comply with RF exposure limits.
- Do not make any changes or modifications to the SLA12 that are not expressly approved by Visteon Corporation, as it may void the user’s authority to operate the equipment.
SLA Features
- The SLA12 (Sense Line Assembly) is an electronic module intended to monitor battery module cell groups voltages and module temperatures from the High Voltage battery bus in addition to activate cell balancing to improve battery cells life.
- All cell voltages and module temperatures are reported directly to the VICM3 on a regular periodic basis via Wireless communication through the BRFM.
- The SLA12 implements a Cell Monitoring Unit (CMU) board that uses a Pinnacle IC (ADRF8800), this is an IC that provides wireless communication between the Battery Cell Monitoring chip and the Battery Management System Controller
- SLA12 operates in the frequency range 2.405 GHz – 2.480 GHz (ISM band) by using Wireless battery management technology.
Duty Cycle
- SLA12 can send 3 packets per 100ms + 3 packets of (health reports) every minute.
- With a path stability of 81 %, this means (30*60+3)/0.81 = 2225.92 transmissions per minute or 37.0987 transmissions per second.
- The max TX length is 1.016 ms 37.0987 TX per second with each TX being 1.016 ms = on for 37.6 ms every second = 3.7% of Duty Cycle. The 27% Duty Cycle belongs to the Dual BRFM (FCC ID: NT8-BRFM/IC: 3043A-BRFM).
System interaction
| Module-to-Vehicle Electrical Interface | |
|---|---|
| Analog Input | _Battery module provides voltage to SLA12. Power |
nominal value is 43.8 V Minimum voltage expected is 26.4 V and maximum is 52.8
V. NTC1, NTC2 and NTC3 thermistors from ICB._
Digital (discrete state) Input| NA
Analog Output| NA
Digital (discrete state) Output| NA
---|---
Communication Bus| NA
RF Link(s)| ISM Band (2.405 GHz to 2.480 GHz) used to communicate
with BRFM modules. Rx sensitivity shall be around 50% of PER, where each
measurement shall vary by no more than +/- 2.0dB from the golden sample. Tx
output power shall vary by no more than +/-2.5dB from the golden sample. Radio
frequency reference shall be within ± 20PPM from desired
frequency (2.44GHz, channel 7).
Module-to-Vehicle Non-Electrical Interface
N/A
User Interface
NA
Internal Interface
Note: For these internal I/O, monitoring shall only occur via communication bus data or via indirect methods. Direct monitoring using attachments leads to external monitoring devices shall not be included.
Analog Input| NA
Digital (discrete state) Input – steady-state I/O| NA
Switching & Clock Frequency Content| SPI communication shall be
1Mbps nominal. Used to communicate between RF manager to Sensors ASIC. RF
Manager IC XTAL frequency shall be 40MHz nominal.
Digital (discrete state) Input – dynamic I/O| NA
Analog Output| ****
Main power supply SMPS U302 0shall have an output voltage of 3.3V with ±5mV peak-to-peak ripple voltage
Digital (discrete state) Output
Communication Bus
Note: This section assumes that production software is not mandatory;
the use of specialized software is acceptable.
Note: Software diagnostic timers should be reset to minimum detection values, to facilitate assertion of potential diagnostic flags during the RF exposure time (maximum 2 seconds).
Note: States/faults/issues shall be reported directly over the communication bus (i.e., Class 2, Controller Area Network (CAN), etc.) or indirectly if the communication bus is not available via the cycling of output(s) (e.g., PWM duty cycle change, telltale flash rate change, etc.)
Note: Unless otherwise specified in the EMC Test Plan, in order to ensure a refreshed value, all information related to data monitoring (such as analog input voltages, operating states, etc.) shall be via parameter requests (e.g., Parameter ID (PID)) and not via scheduled, or periodic, broadcast messages. This ensures bi-directional communications during immunity testing.
- The following information shall also be included in the case of radio equipment intentionally emitting radio waves:
- a. Frequency band : 2.405 – 2.480 GHz
- b. Maximum radio-frequency power transmitted in the frequency band(s) in which the radio equipment operates. Max output power = 10 dBm
FCC
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
- This device may not cause harmful interference, and
- The device must accept any interference received, including interference that may cause undesired operation.
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment. RF
exposure safety
This device complies with the FCC RF exposure limits and has been evaluated in
compliance with portable exposure conditions.
The equipment must be installed and operated and was evaluated with minimum
distance of 3.69 cm of the human body. This distance or greater is maintained
by vehicle design and ensures compliance by normal use of the vehicle.
For a Class B digital device or peripheral, the instructions furnished the
user shall include the following or similar statement, placed in a prominent
location in the text of the manual:
Note: This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses and
can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
This device complies with Industry Canada License-exempt RSS standard(s). Operation is subject to the following two conditions:
- This device may not cause harmful interference, and
- The device must accept any interference received, including interference that may cause undesired operation.
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
RF exposure safety
This device complies with the RF exposure limits and has been evaluated in
compliance with portable exposure conditions.
The equipment must be installed and operated and evaluated with a minimum
distance of 3.69 cm from the human body. This distance or greater is
maintained by vehicle design and ensures compliance with the normal use of the
vehicle.
- Model Name: SLA12
- Type of product: Sense Line Assembly
- Brand Name: Visteon
- Manufacturer: Visteon Corporation
- Manufacturer Address: One Village center drive, Van Buren Township
- 48111-5711 Michigan
- United States of America