I am part of a team at school that designs and builds a hybrid electric vehicle. We have chosen to use a series hybrid configuration, so we will be using a motor as a generator to charge lithium polymer batteries, which will be connected to a battery management system. We are likely going to be using a brushed DC motor as the generator, which will be connected to a small engine that will be running at a constant rpm and I'm trying to figure out if a controller is necessary for this generating motor and if not, what is the best option? Also what needs to be regulated before reaching the battery?

  • \$\begingroup\$ You'll need a way to detect when the LiPo batteries are fully charged, for one. You can get charge controller ICs which handle this for you - the MCP73833 is a common one. You'll probably also want to ensure that they're properly balance-charged if you're using multi-cell LiPo batteries, which I suspect you will be. \$\endgroup\$ – Polynomial Nov 19 '16 at 0:17
  • \$\begingroup\$ You'll need a LiPo Charge controller. \$\endgroup\$ – Voltage Spike Nov 19 '16 at 0:24
  • \$\begingroup\$ The battery will be connected to a BMS so is a charge controller connected to the generator neccesary? Also what about controlling safety-critical aspects? \$\endgroup\$ – Michael Mayberry Nov 19 '16 at 0:31

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