Mein Foto vom BMS-Board hat einen myimiev.com Forenuser eine Recherche starten lassen. Seine Erkenntnisse:
The LTC6802-2 is a complete battery monitoring IC that includes a 12-bit ADC, a precision voltage reference, a high voltage input multiplexer and a serial interface. Each LTC6802-2 can measure 12 series connected battery cells, with a total input voltage up to 60V. The voltage on all 12 input channels can be measured within 13ms.
Many LTC6802-2 devices can be stacked to measure the voltage of each cell in a long battery string. Each LTC6802-2 has an individually addressable serial interface, allowing up to 16 LTC6802-2 devices to interface to one control processor and operate simultaneously.
To minimize power, the LTC6802-2 offers a measure mode to monitor each cell for overvoltage and undervoltage conditions. A standby mode is also provided to reduce supply current to 50μA.
Each cell input has an associated MOSFET switch that can discharge any overcharged cell.
[Edit]
From looking at the circuit board the bleed circuit looks like two 82 Ohm resistors in parallel, so 41 Ohms to bleed 4.1 V is about 100 mA bleed current--the same as in a Tesla S pack.
The little white surface mount device(s) is a fuse.
The temperature sensors are located near the philips head screws on the right with the two tiny traces, the third is located within the LT chip itself.
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Beim 8-er Modul (eigentlich 2 4er-Module) ist ein dem 4er-Modul sehr ähnliches Board verbaut. Es hat lediglich einen zusätzlichen Stecker für das benachbarte 4er-Modul verbaut und auf dem benachbarten 4er-Modul ist nur ein einfaches Extension-Board verbaut ohne ICs. Gesteuert/überwacht werden die 4 bzw. 8 Zellen von dem einen LTC6802-2.
Martin