astra_conv:conversion:wiring_logics:wiring_logics
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astra_conv:conversion:wiring_logics:wiring_logics [2014/05/20 17:39] richard |
astra_conv:conversion:wiring_logics:wiring_logics [2014/05/20 17:45] (current) richard |
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| The BMS peripherals board, which is located in the rear distribution box, comprises three rather independent circuits that cover different logics tasks. They however share some power supply and signal inputs. | The BMS peripherals board, which is located in the rear distribution box, comprises three rather independent circuits that cover different logics tasks. They however share some power supply and signal inputs. | ||
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| - | The "charger lock" section in principle consists of a conventional relay that disables the traction battery charger when ignition is on. This is a safety measure to avoid that the traction battery is overcharged, since the BMS will wrongly interpret an interruption of the cell loop as "LVC" (low voltage cutoff), when ignition is on. | ||
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| - | The "HV battery alarm" section combines the three alarms "HV idle voltage", "isolation alarm" and "BMS buzzer", and generates the "HV battery alarm", that is fed to the GSM module. A timer module is intended to mask out "HVC" (high voltage cutoff) events (that only occur at the end of the charging phase and only take a few minutes), so that only LVC events are notified. I however later changed the timer to a very short time (a few seconds), so that it is without effect and now both events will lead to an HV battery alarm. | ||
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| - | The "DCDC control / 12V recharger" microcontroller circuit controls the driver of the DCDC converter. | ||
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| - | The DCDC converter itself and its surrounding circuitry is described in [[astra_conv:conversion:dcdc_converter:dcdc_converter#dc_dc_converter|"dcdc_converter"]]. | ||
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| Please see the circuit diagram and a view of the circuit board below. A top view of the board with explanations of the different terminals and LEDs is provided in the chapter [[astra_conv:conversion:distribution_boxes:distribution_boxes#trunk_distribution_box|"trunk distribution box"]]". | Please see the circuit diagram and a view of the circuit board below. A top view of the board with explanations of the different terminals and LEDs is provided in the chapter [[astra_conv:conversion:distribution_boxes:distribution_boxes#trunk_distribution_box|"trunk distribution box"]]". | ||
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| While charging and shortly after, a BMS alarm can only mean "high voltage threshold crossed", which is handled by the battery charger and does not require manual intervention. | While charging and shortly after, a BMS alarm can only mean "high voltage threshold crossed", which is handled by the battery charger and does not require manual intervention. | ||
| Else, a BMS alarm will mean that the low voltage threshold has been crossed at at least one cell. | Else, a BMS alarm will mean that the low voltage threshold has been crossed at at least one cell. | ||
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| + | I however later changed the timer in this circuit to a very short time (a few seconds), so that it is without effect and now both events will lead to an HV battery alarm. | ||
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astra_conv/conversion/wiring_logics/wiring_logics.1400607555.txt ยท Last modified: 2014/05/20 17:39 by richard
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