New Protected Version 8-Channel LiPo/LiFePO4 Low Voltage Protection Circuit + Parallel Adapter.
Provides two functions, individual low voltage protection for each channel, and provides a convenient way to connect the balance plugs for up to four Turnigy/Zippy LiPo packs in parallel. The PCB contains pads for four 9-pin JST-XH connectors. This is a very easy way to build up to 20Ah packs, and provide cell-level low voltage protection at the same time, for either LiPo or LiFePO4-based packs. The standard balancer output is via a 9-pin 3.5mm mini-terminal block.
This version now includes 5.1V zener diodes on each circuit, to help provide protection from loose connections and wiring errors causing the TC54 voltage detection chips to fail.
The LVC function provides an opto-coupled 2-wire output signal that can be connected into the ebike controller's ebrake input, or can be used to pull down the throttle signal, that goes active anytime a block of paralleled cells goes below 3.0V, for LiPo, or 2.1V for LiFePO4. This will cause the controller to temporarily cut the throttle input, which removes the load. Simple, but very effective and estremely reliable.
Options are provided for either one or two boards, with the latter having the LVC opto outputs already connected.
A two-wire pigtail and a 2-pin header connector is provided for each board, or group of boards, which can be used to "daisy-chain" the opto outputs from multiple LVC/HVC/Parallel Adapter boards.
Basic options are for one, or two, LVC boards per PCB-only, plus a full set of illustrated assembly and test instructions. Options are also provided for a full kits, for one or two LVC boards. The links below are for Bill of Materials (BOM) Word files that have links to all the parts:
8s LVC BOM
A complete set of illustrated assembly, test and connection intructions is provided here:
6s-8s LVC Assembly, Test and Connection Instructions A partial kit option is provided, which includes all non-Mouser parts, in addition to the PCB(s).
