2. Changelog

Release 1.6.3

Software:

  • Toolchain:

    • the flash process sometimes did not work correctly for the secondary MCU. The robustness of the _ack function was generally improved and flashing both, primary and secondary, MCU should no longer fail.

    • if foxBMS was not developed inside a git repository, building the binaries failed. For these cases building now succeeds and the binary is still runnable. This requires the define BUILD_ALLOW_DIRTY_STARTUP to be set to 1 (in general.h for both, primary and secondary MCU). Defining BUILD_ALLOW_DIRTY_STARTUP to 1 is the default setting.

  • Bugfixes:

    • minimum, maximum and average SOC were identically if Coulomb counting feature of current sensors was used (sox.c/h)

    • recommended safety limit flag for undertemperature in charge direction was was never set. (diag_cfg.c)

    • diagnosis system monitoring error occured if ISOGUARD-module was disabled (isoguard.c)

    • current sensor detection failed always if triggered mode was selected, as CAN TX messages were activated after check for current sensor (sys.c)

  • Enhancements:

    • changed file structure to allow type definitions to be used as return values for static function prototypes (cansignal_cfg.c)

Hardware:

  • none

Documentation:

  • none


Release 1.6.2

Software:

  • Toolchain:

    • added cpplint configuration file

    • added cppcheck configuration file

    • added flake8 configuration file

    • added busmaster project file

  • Bugfixes:

    • cell voltages for module 4 for cells 12 and upwards were not transmitted via CAN (cansignal_cfg.c)

    • ISO_MeasureInsulation() did not correctly utilize DIAG_SysMonNotify(), which could lead to initialization errors (isoguard.c)

    • cell voltages and temperatures are now depicted in foxBMS-GUI if more than eight modules are selected (foxbms_interface.py)

    • compiling primary or secondary MCU binaries without COM module enabled led to a compile error

    • SPI chipselect pin for FPGA extension board was erroneously set in EEPROM module (eepr.c)

  • Enhancements:

    • source code cleanup of interlock module (interlock.c/h)

Hardware:

  • none

Documentation:

  • fixed pinout of temperature sensor connectors X201 and X202 for 18-cell Slave v1.1.3 and above


Release 1.6.1

Software:

  • Toolchain:

    • none

  • Bugfixes:

    • fixed the extension of the startup scripts (*.S to *.s)

  • Enhancements:

    • none

Hardware:

  • none

Documentation:

  • none


Release 1.6.0

Software:

  • Toolchain:

    • Updated to waf-2.0.15 (from waf-2.0.14)

    • size is now implemented as a waf-feature to speed up build times

    • foxBMS custom waf tasks displayed wrong information in the terminal about the running processes (e.g., Compiling instead of Creating hex file)

    • fixed a task order constraint when building the elf file. For details see the updated build documentation (see section Build Process).

    • added a simple test, that verifies that low level drivers do not relay on higher level modules (e.g., FreeRTOS, database, etc.). A project can be tested by running python tools\waf build_primary_bare or python tools\waf build_secondary_bare (see section Build Process).

    • removed unnecessary run_always attribute to reduce build time

    • rewrote the build of libraries. Now libraries can be build independent from the project configuration. Libraries can then later be added to the project as needed with the configure --libs=... command (see section Build Process).

    • fixed clean_libs command as it did not remove all build_libs artifacts

    • if an include directory does not exist, an error is raised

    • if a directory is included more than once, an error is raised

    • some build attributes of bld.env inside the wscript s haven been renamed (__inc_hal to hal_dirs, __inc_FreeRTOS to FreeRTOS_dirs, __bld_common to common_dir, __sw_dir to es_dir and __bld_project to mcu_dir

    • an error is raised if the path to the foxBMS project directory contains whitespace

    • an error is raised if a comparison between signed and unsigned integers is used

    • ensured compatibility with PyYAML v5.1 by supplying a Loader-parameter to calls of yaml.load()

    • fixed generation of .hex file to only contain flash content

    • raise the switch-warning to error in GCC

    • add a configuration for cppcheck to the repository

    • raise the type-limits-warning to error in GCC

    • raise the double-promotion-warning to error in GCC

  • Bugfixes:

    • in the function LTC_RX_PECCheck(), the LTC PEC (packet error code) check of the last module in the daisy-chain was overriding the PEC check of all preceding modules. If the PEC of the last module was correct, all other PECs were detected as correct, even if some errors were present (ltc.c)

    • fixed compile error, when setting define MEAS_TEST_CELL_SOF_LIMITS to TRUE (bms.c)

    • some variables used to store database content at the beginning of the BMS_Trigger() function were defined as local variables. This could lead to a stack overflow if a high number of modules was configured. These variables have been defined as static to solve this issue (bms.c)

    • the DIAG_GeneralHandler has been removed. The DIAG_Handler must be used for all diagnosis instead, except for the diagnosis of the contactors, which is handled by DIAG_ContHandler.

    • DIAG_Handler returned wrong value if it was called when an error has already been detected (diag.c)

    • If more cell voltages or temperatures were defined for CAN transmission than for measurement in the battery system, during transmission, the array boundaries of the local variables storing database entries were violated. now boundary violations are checked and default values are sent for CAN signals not corresponding to existing measurements. (cansignal_cfg.c/h)

    • fixed incorrect array offset mapping CAN1 RX messages to respective CAN1 RX signals (cansignal.c)

    • moved fuse state error handling from CONT module to BMS module to avoid CONT state machine switching into error state without BMS state machine transitioning into error state

    • fixed an implicit cast to uint that prevented working protection of the battery cells against overdischarge and -charge below zero degrees (bms.c)

    • moved checksum feature to main wscript

    • added initialization state flags to contactor-, BMS- and balancing-statemachine in order to fix race-conditions between these statemachines and the sys-statemachine (sys.c/h, bal.c/h, bms.c/h, contactor.c/h)

    • fixed overlapping signals in dbc file for CAN message CAN_Cell_voltage_M2_0

    • fixed function BMS_CheckCurrent(). If contactors opened in case of over-current, error flags remained set in spite of the current being back to zero.

    • allow for current thresholds in BMS_CheckCurrent() differing from the cell-limits and adaptable to both charge and normal powerline (bms.c, contactor.c/h)

  • Enhancements:

    • reimplemented UART COM Decoder as a non-realtime background task for easier use

    • removed direct register access in UART module to improve portability (uart.c/h)

    • added plausibility module to check pack voltage (plausibility.c/h)

    • added plausibility module to check cell voltage and cell temperature (slaveplausibility.c/h)

    • the Python wrapper and DLL needed to run the graphical user interface with a CAN-adapter from the company Peak are now redistributed with foxBMS. Before using them, the conditions in the file readme.txt in tools\gui must be read and accepted.

    • updated STM32 HAL to version 1.7.4 and CMSIS to version 2.6.2

    • rewrote CAN driver to work with new HAL CAN module introduced in HAL version 1.7.0 (can.c/h, can_cfg.c/h)

    • updated FreeRTOS to version 10.2.0 and adapted FreeRTOSConfig.h accordingly

    • added dedicated datasheet files for EPCOS B57251V5103J060, EPCOS B57861S0103F045 and Vishay NTCALUG01A103G NTC sensors to calculate cell temperatures using either a look-up table or polynomial approximation

    • the diagnosis modules of primary and secondary were unified and moved to mcu-common

    • error and safe operating area flags are now written periodically (1ms) to prevent erroneous database operations due to concurrency effects

    • moved #define to configure current sensor response timeout from cansignal_cfg.h to batterysystem_cfg.h

    • moved #define to select if current sensor is in cyclic or triggered mode from can_cfg.h to batterysystem_cfg.h

    • added simple diag-function that allows to track the call period of system tasks

    • moved linker scripts from src to general\config\STM32F4xx

    • moved FreeRTOS configuration headers from src\general\config to src\general\config\FreeRTOS

    • removed MCU_0_ and MCU_1_ from the pin defines in io_mcu_cfg to increase the readability of the drivers

    • added deep-discharge flag that gets set if the deep-discharge voltage limit is violated. Flag is stored in non-volatile backup SRAM and can only be reset with CAN debug message. This prevents closing the contactors before the affected cell has been replaced

    • added support for FreeRTOS runtime stats. The stats can be accessed by the new ‘printstats’ command in the COM module.

    • added state transition functions for ltc-statemachine to reduce code size (ltc.c)

    • added stack overflow-handler that can be used for debugging and detecting stack overflows during development

    • disabled dynamic allocation for operating system, removed heap-implementation and switched to static allocation for operating system components

    • information about the git repository from which the binaries are built is included in the binaries. The define BUILD_ALLOW_DIRTY_STARTUP has been added in general.h to allow or disallow the startup of the BMS in case of a non clean repository.

    • set error flag if current flows in spite of all contactors being open (bms.c)

    • added support for TCA6408A port expander in LTC module (write output pins and read input pins)

    • added decoding for up to 18 cell voltages per module in foxBMS interface

Hardware:

  • removed version number from hardware file names

  • Slave 12-cell v2.1.7

    • EMI layout improvements (targeting UN ECE R10 Revision 5)

    • added RC filters on NTC sensor inputs

    • replaced linear regulators for LTC6811 5V supply with DC/DC converters

    • added circuit for switching off 5V DC/DC converters in LTC sleep mode, thus reducing the current consumption to less than 20µA

  • Interface LTC6820 v1.9.4

    • replaced connectors J500 and J501 with TE 534206-4 due to clearance issues in component placement

Documentation:

  • added missing unit information for some CAN signals in section Communicating with foxBMS

  • added a section on how to configure conda to work behind a proxy.


Release 1.5.5

Software:

  • Toolchain:

    • Updated to waf-2.0.14 (from waf-2.0.13)

  • Bugfixes:

    • fixed UART frame error due to floating RX pin by enabling pull-up in the MCU

    • fixed reading wrong entry from database when checking battery system current against SOF limits (bms.c)

    • the flag SPI transmit_ongoing was reset incorrectly after SPI dummy byte was transmitted. This lead to invalid measured cell voltages if the daisy-chain was too long (i.e., more than 10 BMS-Slaves in the daisy-chain)

    • enabled simultaneous measurement of lithium-coin-cell V_bat and MCU temperature in ADC module

    • fixed error calculating MCU temperature in ADC module

    • balancing threshold for voltage-based balancing was set in the wrong place: it is now set in the function BAL_Activate_Balancing_Voltage (bal.c)

  • Enhancements:

    • database entries are initialized with 0 to prevent undefined data if entries are read before valid values are written into the database (database.c)

Hardware:

  • BMS-Slave 18-cell v1.1.5

    • EMI layout improvements (targeting UN ECE R10 Revision 5)

    • adapted component variations to simplify the management of component variations in Altium Designer

    • replaced DC/DC converter power inductor to comply with AEC-Q

    • added circuit for switching off DC/DC converters in LTC sleep mode, thus reducing the current consumption to less than 20µA

    • added pull-ups on GPIOs 6-9 of the LTCs (open-drain outputs) to enable them to be used as digital I/O

Documentation:

  • BMS-Interface: fixed pin 11 in the pinout of the connectors for version 1.2.0 and above

  • Updated BMS-Slave 18-cell hardware documentation for version 1.1.5

  • Updated year in copyright

  • Fixed some wrong @file attributes in doxygen comments


Release 1.5.4

Software:

  • Toolchain:

    • Added a Python script that implements a graphical user interface to communicate with foxBMS. The instructions in the README.md file supplied with the script must be followed.

    • Removed obsolete build.py wrapper

    • Updated to waf-2.0.13 (from waf-2.0.12)

    • Fixed a build error when using the build_all option

  • Bugfixes:

    • In BMS module, wait time between error request to contactors and open request to interlock was increased. Otherwise, interlock opened before contactors were open. If this is the case, both contactors open at the same time without any delay between first and second contactor.

    • Fixed error in reading of interlock feedback.

  • Enhancements:

    • none

Hardware:

  • none

Documentation:

  • none


Release 1.5.3

Software:

  • Toolchain:

    • raised compiler warning [-Werror=comment] to error level

    • write compiler macros to header file for improved eclipse support

  • Bugfixes:

    • fixed a bug, that caused the mcu temperature for primary and secondary mcu to be never updated.

    • fixed a bug, that caused the coin cell voltage of the primary mcu to be never updated.

    • rewrite of struct DIAG_RETURNTYPE_e. The enumeration had non-consecutive numbering and potentially dangerous typo in duplicate enum (DIAG_HANDLER_RETURN_ERR_OCCURED = 2 and DIAG_HANDLER_RETURN_ERR_OCCURRED = 4).

    • fixed a bug, that diagnosis entry for a voltage violation of the maximimum safety limit wrote to wrong database entry.

    • NVRAM module was compiled twice for primary mcu. Once it was compiled by mcu-common module and once again in mcu-primary module). Now compiled only once by mcu-common module as on mcu-secondary.

  • Enhancements:

    • debug printing is replaced by printf for easier and more versatile usage

    • added additional basic math macros (e.g., LN10, PI etc.) in foxmath.h

    • Fuse state is now monitored. Fuse can be placed in NORMAL and/or CHARGE path. Added flag to CAN0_MSG_SystemState_2 message

    • added support to build and link multiple libraries

    • added warning flag if MCU die temperature is outside of operating range to CAN0_MSG_SystemState_2 message

    • added warning flag to replace coin cell if measured coin cell voltage is low to CAN0_MSG_SystemState_2 message

    • added daisy-chain communication error flags to CAN0_MSG_SystemState_2 message

    • added error flag if an open voltage sense wire is detected

Hardware:

  • none

Documentation:

  • updated library build documentation

  • updated .dbc file


Release 1.5.2

Software:

  • Toolchain:

    • updated to waf-2.0.12 (from waf-2.0.11)

  • Bugfixes:

    • fixed bug that delay after SPI wake-up byte was not long enough

  • Enhancements:

    • increased CPU clock frequency from 168MHz to 180MHz

    • increased SPI bitrate from 656.25kHz to 703.125kHz

    • added CAN boot message with SW-version and flash checksum (0x101)

    • CAN messages are now always sent, even if system error was detected

    • foxBMS SW-version requestable via CAN (request ID: 0x777, response ID: 0x101)

    • added insulation error flag to DATA_BLOCK_ERRORSTATE_s

    • configurable behavior if contactors should be open on insulation error or not

    • separate configurable precharging for charge/discharge path possible

Hardware:

  • Master v1.0.6

    • adapted CAN filter circuit for improved fault tolerance at short of CAN_L to GND or CAN_H to supply

  • Extension v1.0.5

    • adapted CAN filter circuit for improved fault tolerance at short of CAN_L to GND or CAN_H to supply

Documentation:

  • updated instruction for flashing primary MCU

  • updated FAQ section


Release 1.5.1

Software:

  • Toolchain:

    • toolchain compatible with POSIX operating systems

    • updated to waf-2.0.11 (from waf-2.0.10)

    • fixed missing files in eclipse workspace (CHANGELOG.rst and compiler-flags.yml)

  • Bugfixes:

    • fixed bug updating BKPSRAM values to EEPROM: BKPSRAM checksum was calculated wrong

  • Enhancements:

    • modules CONTACTOR, INTERLOCK and ISOGUARD can be disabled if not needed

    • selected new EEPROM M95M02 as default EEPROM (equipped on foxBMS-Master since v1.0.5)

Hardware:

  • none

Documentation:

  • added a section on how to build and include a library

  • removed references to directory foxbms-setup, as it is now simply called foxbms

  • removed references to script bootstrap.py, as this script is no longer used


Release 1.5.0

  • foxBMS has been migrated from Python 2.7 to Python 3.6. The foxconda3 installer is found at https://iisb-foxbms.iisb.fraunhofer.de/foxbms/. foxconda3 must be installed to C:foxconda3.

  • EEPROM addresses on the BMS-Master were changed. Previous saved EEPROM data will be lost with new update.

  • introduction of an improved software structure to differentiate between hardware-dependent and hardware-independent software layers

Software:

  • Toolchain:

    • switched to monolithic repository structure to simplify the versioning

    • raised compiler warning [-Wimplicit-function-declaration] to error level

    • avoid shell=True in python subprocess

    • updated python checksum script

    • updated to waf-2.0.10 and renamed the waf binary to simply waf

  • Bugfixes:

    • fixed bug passing mV instead of V to function LTC_Convert_MuxVoltages_to_Temperatures()

    • typedef DATA_BLOCK_ID_TYPE_e starts at 0x00 instead of 0x01 (renamed DATA_BLOCK_1 to DATA_BLOCK_00) for consistency

    • fixed bug in ltc module: wrote wrong values to database when using filtered mode for measuring cell voltages and temperatures

    • #define CONT_PRECHARGE_VOLTAGE_THRESHOLD used V instead of mV

    • fixed bug in function CAN_WakeUp(): wrong HAL function call was corrected

    • fixed bug in diag module: did not evaluated diagnostic errors with DIAG_ERROR_SENSITIVITY_HIGH

  • Enhancements:

    • adapted wscripts to new restructured software architecture

    • added timestamp to MCU backup SRAM and external EEPROM entries

    • added three alarm levels (maximum operating limit, recommended safety limit, maximum safety limit)

    • enhanced voltage based balancing algorithm

    • updated .dbc file

    • added measure AllGPIO state to ltc module

    • added CAN message for pack voltage (CAN-ID: 0x1F0)

    • added algorithm module to enable future advanced algorithms

    • increased FreeRTOS heap size from 15kByte to 20kByte

    • increased stack size of 100ms application task from 512bytes to 1024bytes

    • increased size of CAN TX message buffer from 16 to 24 messages

    • added calculation of moving average values (1s, 5s, 10s, 30s and 60s) for current and power

    • database timestamp are now automatically written on DB_Write - no need to manually update timestamps anymore

    • added native matlab datatypes support

    • cleanup of ASCII conversion functions (uint to ASCII, hex to ASCII, int to ASCII)

    • added nvramhandler to automatically update non-volatile memory (i.e., external EEPROM on BMS-Master)

    • renamed various structs, variables and functions for an improved code understanding and increased readability

Hardware:

  • added hardware changelogs

  • ported hardware PCB design files to Altium Designer format (AutoDesk Eagle files no longer supported)

  • updated hardware PCB designs: Master V1.0.5, Extension V1.0.4, Interface 1.9.3, Slave 12-cell (LTC6811-1) V2.1.5, Slave 18-cell (LTC6813-1) V1.1.3

Documentation:

  • added foxbms styleguide

  • fixed spelling errors

  • added documentation of software architecture

  • added documentation of algorithm module

  • added documentation of nvramhandler

  • updated isoguard documentation


Release 1.1.0

foxbms-setup(v1.0.1):

  • updated build scripts

  • updated waf script

  • updated README.md

mcu-common(v1.1.0):

  • updated license header

  • seperated database entries to prevent concurrent read/write requests to the database

  • updated wscripts to build specific files only for primary/secondary

  • moved sdram from common repository to primary repository

  • renamed database functions to DB_WriteBlock() and DB_ReadBlock()

  • There was a compile error when CAN0 and CAN1 are deactivated

  • updated README.md

mcu-freertos(v1.1.0):

  • updated license header

  • updated wscripts to build specific files only for primary/secondary

  • moved sdram from common repository to primary repository

  • updated README.md

mcu-hal(v1.0.1):

  • updated license header

  • updated README.md

mcu-primary(v1.1.0):

  • uses now wafs feature of variant builds

  • baudrate of CAN0 and CAN1 can now be set independently

  • the setup of the tasks in engine and application layer is now consistent

  • updated license header

  • fixed a bug in contactor module to write unnecessary often into the database which caused a high cpuload

  • seperated database entries to prevent concurrent read/write requests to the database

  • added support of external SDRAM using keyword MEM_EXT_SDRAM

  • moved sdram from common repository to primary repository

  • fixed a bug that closed the interlock for a short period of time after restart even if no CAN message was received to switch to STANDBY state

  • renamed database functions to DB_WriteBlock() and DB_ReadBlock()

  • updated README.md

mcu-secondary(v1.1.0):

  • uses now wafs feature of variant builds

  • the setup of the tasks in engine and application layer is now consistent

  • updated license header

  • seperated database entries to prevent concurrent read/write requests to the database

  • renamed database functions to DB_WriteBlock() and DB_ReadBlock()

  • deleted unused code

  • updated README.md

tools(v1.0.2):

  • Updated waf

  • Updated copyright

  • Updated the Eclipse Project

  • Updated checksum tool from gdb-based to object-copy-based toolchain

  • updated README.md

documentation(v1.0.2):

  • updated documentation for the build process

  • updated FAQ section

  • updated copyright

  • updated README.md


Release 1.0.1

  • updated build scripts

  • updated waf script


Release 1.0.0

  • renamed repository from foxBMS-setup to foxbms-setup.

  • Removed update functionallity

  • Moved arm-none-eabi-size call as post function in build process

  • added a .config.yaml file which includes a list of repositories which are boostrapped and their bootstrap location.


Release 0.5.2

Release notes: We fixed a bug in the ltc driver, leading to a non-functional temperature sensing for foxBMS Slave Hardware version 1.xx. The slave version is configuration for the primary MCU in foxBMS-primarysrcmoduleconfigltc_cfg.h by the define SLAVE_BOARD_VERSION and for the secondary MCU in foxBMS-secondarysrcmoduleconfigltc_cfg.h by the define SLAVE_BOARD_VERSION.

  • Set SLAVE_BOARD_VERSION to “1” if you are using version 1.xx of the foxBMS Slave.

  • Set SLAVE_BOARD_VERSION to “2” if you are using version 2.xx of the foxBMS Slave. Version 2.xx is the default configuration.

Changelog:

  • foxBMS-primary

    • fixed LTC temperature sensing bug

  • foxBMS-secondary

    • fixed LTC temperature sensing bug


Release 0.5.1

  • foxBMS-setup

    • added parameter ‘-u’, ‘–update’ to bootstrap.py for updating the setup repository.

  • foxBMS-primary

    • updates for waf 1.9.13 support

    • updated module/EEPROM and migrated to module/nvmram

    • minor code adaptations and cleanup

  • foxBMS-secondary

    • support for waf 1.9.13

    • minor code adaptations and cleanup

  • foxbMS-tools

    • updated waf from version 1.8.12 to version 1.9.13


Release 0.5.0

A new project structure is now used by foxBMS. The documentation is no more contained in the embedded software sources and has its own repository. FreeRTOS and hal have their own repository, too. A central repository called foxBMS-setup is now used. It contains several scripts:

  • bootstrap.py gets all the repositories needed to work with foxBMS

  • build.py is used to compile binaries and to generate the documentation

  • clean.py is used to removed the generated binaries and documentation

Release notes:

  • New project structure

  • Added support for external (SPI) EEPROM on the BMS-Master

  • Redesign of can and cansignal module to simplify the usage

  • Added support for triggered and cyclic current measurement of Isabellenhütte current sensor (IVT)

  • Current sensor now functions by default in non-triggered modus (no reprogramming needed for the sensor)

  • Updated and restructured complete documentation

  • Restructured file and folder structure for the documentation

  • Added safety and risk analysis section

  • Cleaning up of non-used files in the documentation

  • Consistency check and correction of the naming and wording used

  • Addition of the source files (e.g., Microsoft Visio diagrams) used to generate the figures in the documentation

  • Reformatted the licenses text formatting (no changes in the licenses content)

  • Updated the battery junction box (BJB) section with up-to-date components and parameters


Release 0.4.4

The checksum tool is now automatically called when building binaries. Therefore the command python tools/waf-1.8.12 configure build chksum is NOT longer supported. The command to build binaries with checksum support is python tools/waf-1.8.12 configure build This is the build command used in foxBMS FrontDesk, that is, FrontDesk software is compatible with this change and now supports automatic checksum builds.

Release notes:

  • Improved checksum-feature

  • Updated copyright 2010 - 2017


Release 0.4.3

Starting from this version, a checksum mechanism was implemented in foxBMS. If the checksum is active and it is not computed correctly, it will prevent the flashed program from running. Details on deactivating the checksum can be found in the Software FAQ, in How to use and deactivate the checksum.

Release notes:

  • Important: Changed contactor configuration order in the software to match the labels on the front

    • Contactor 0: CONT_PLUS_MAIN

    • Contactor 1: CONT_PLUS_PRECHARGE

    • Contactor 2: CONT_MINUS_MAIN

  • Fixed an bug which could cause an unintended closing of the contactors after recovering from error mode

  • Increased stack size for the engine tasks to avoid stack overflow in some special conditions

  • Added a note in the documentation to indicate the necessity to send a periodic CAN message to the BMS

  • Fixed DLC of CAN message for the current sensor measurement

  • Added checksum verification for the flashed binaries

  • Updated linker script to allow integration of the checksum tool

  • Activated debug without JTAG interface via USB


Release 0.4.2

Release notes:

  • Removed schematic files from documentation, registration needed to obtain the files

  • Added entries to the software FAQ


Release 0.4.1

Release notes:

  • Corrected daisy chain connector pinout in quickstart guide

  • Corrected code for contactors, to allow using contactors without feedback

  • Corrected LTC code for reading balancing feedback

  • Quickstart restructured, with mention of the necessity to generate the HTML documentation


Release 0.4.0

Beta version of foxBS that was supplied to selected partners for evaluation.

Release notes:


foxBMS Hardware Change Log (deprecated)

The hardware changelog is now included in the regular changelog (since version 1.5.0).

foxBMS Master

V1.0.6

adapted CAN filter circuit for improved fault tolerance at short of CAN_L to GND or CAN_H to supply

V1.0.5

schematic cleanup, improved fonts and sizes on PCB

V1.0.4

introduced minor improvements to design
replaced EEPROM with M95M02-DRMN6TP

V1.0.3

ported schematics and layout to Altium Designer
created hierarchical design
introduced minor improvements to design

V1.0.2

replaced ADuM14XX isolators by ADuM34XX

V1.0.1

added fuse protection on power supply input

V1.0.0

initial release

foxBMS Extension

V1.0.5

adapted CAN filter circuit for improved fault tolerance at short of CAN_L to GND or CAN_H to supply

V1.0.4

schematic cleanup, improved fonts and sizes on PCB

V1.0.3

ported schematics and layout to Altium Designer
created hierarchical design
introduced minor improvements to design

V1.0.2

replaced ADuM14XX isolators by ADuM34XX

V1.0.1

swapped input protection of isolated GPIOs

V1.0.0

initial release

foxBMS Interface

V1.9.4

replaced connectors J500 and J501 with TE 534206-4 due to clearance issues in component placement

V1.9.3

replace NAND-gate with SN74LVC00AQPWRQ1

V1.9.2

replace OR-gate with NAND-gate and add direction pin

V1.9.1

rotate pinout of Daisy-Chain-Connectors in order to mirror Slave-Connectors
add labels to Daisy-Chain-Connectors
update with new layermarker
replace OR-gate with AEC-Q100 qualified COTS

V1.9.0

update design for reverse isoSPI with second channel
port to Altium Designer

V1.1.0

replaced isoSPI transformer HX1188 by HM2102

V1.0.2

modified connection of isoSPI transformer HX1188

V1.0.1

added fiducials

V1.0.0

initial release

foxBMS Slave 12-cell (LTC6811-1)

V2.1.7

modified component designators to be compatible with 18-cell versions

V2.1.6

EMI improvements (layout)
added RC filters on NTC sensor inputs
added DC/DC converters for 5V LTC supplies

V2.1.5

Replaced Opamps, Port Expanders and Optocouplers with AEC-Q100 compliant ones
Modified silkscreen texts

V2.1.4

Primary software timer is now switched on by default
added layermarker on PCB

V2.1.3

replaced EOL port expander with PCF8574

V2.1.2

ported schematics and layout to Altium Designer
created hierarchical design
introduced minor improvements to design

V2.1.1

improved isolation distances between external DC/DC converter supply and battery module signals

V2.1.0

added DC/DC converter for external power supply

V2.0.3

fixed isoSPI transformer CMC issue

V2.0.2

replaced LTC1380 MUXs with ADG728 (400 kHz I2C)
adjusted connection of 100 ohm resistors for V+/V_REG supply
reduced value of I2C pullups to 1k2

V2.0.1

added missing cooling areas on bottom side, adjusted silk screen
enlarged PCB tracks, R201/202/301/302 other package
enlarged T201/301 cooling area
Replaced PCF8574 with PCA8574 (400 kHz I2C)

V2.0.0

initial release

foxBMS Slave 18-cell (LTC6813-1)

V1.1.5

EMI layout improvements
adapted component variants to other changes

V1.1.4

replaced DC/DC converter power inductor with AEC-Q compliant one
added circuit for switching off DC/DC converters in LTC sleep mode
added pull-ups on all GPIOs of the LTCs

V1.1.3

schematic cleanup, improved fonts and sizes on PCB

V1.1.2

replaced ACPL-247 with ACPL-217 optocoupler in order to be able to use automotive components

V1.1.1

replaced port expander with TCA6408APWR (automotive)
replaced analog buffer opamp with AD8628ARTZ-R2 (automotive)
replaced DC/DC buck controller with LM5161QPWPRQ1 (automotive)

V1.1.0

ported schematics and layout to Altium Designer
created hierarchical design
introduced minor improvements to design
replaced linear regulation (PNP transistor) for LTC power supply with DC/DC converters
improved isolation distances between external DC/DC converter supply and battery module signals
added 8-24 V isolated external power supply
replaced I2C EEPROM 24AA02UID with M24M02-DR (ECC)
replaced isoSPI transformers HX1188NL with HM2102NL
reduced balancing resistors from 2x 68 Ohm to 2x 130 Ohm due to shrinked cooling areas
added layermarker on PCB
Primary discharge timer is now switched on by default

V1.0.1

replaced all LTC1380 MUXs with ADG728 MUXs

V1.0.0

initial release