The ittyBMS is a lower-cost cell module capable of preventing overcharging or overdischarging of a lithium battery cell. It comes in a convenient package capable of fitting any standard prismatic cell from 40Ah through 200Ah, or can be supplied with two ring lugs to mount on any desired battery size.
  • Leaves the center of the battery open, allowing you to hold down the batteries with a simple mounting bar!
  • Can protect cell up to 400C charging rate
  • 1.5 AMP (1500mA) bypass capability -- our competitors are 200mA...
  • Thermal limit protection of the bypass circuit
  • All parameters are fixed at the factory
  • You can request your own high and low set points prior to shipping
  • Our recommended parameters are 2.5V-3.9V hard limits, a lower soft limit of 2.8V, a bypass voltage of 3.60V, and a full-charge level of 3.55V
  • Signals when full charge is reached
  • With our other equipment, supports any charger which will reach the bypass voltage multiplied by the number of cells, so you can choose a charger based on its other features rather than any special curves available
  • This cell unit works with our integration board for throttle control, and over/undercharge protection
ittyBMS Spec Sheet
ittyBMS reference including blink code
ittyBMS Instruction Manual
Two models of ittyBMS
On the left is a negative-post ittyBMS. The wire is colour-coded to attach to a positive post. The cable with white and yellow wires connects all ittyBMS cell modules together, and to PEV's Electric Vehicle Control Module.
ittyBMS modules mounted on Thundersky cells
With an even number of negative- and positive-post ittyBMS modules, the center of the batteries are left wide-open for hold-down bars.
ittyBMS modules mounted on Thundersky cells
The communication cable always plugs into the module of a higher voltage.
ittyBMS modules with silicone protecting the wires
Silicone is used to protect against wire damage due to vibration. Boards are also sealed against environmental contamination.
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