Abstract: A stack current controller may be configured to determine a stack current request based on a state of charge of a battery, an error based on a difference between an actual coolant temperature and a coolant temperature setpoint, or both. A plurality of stack current levels may be implemented corresponding to different battery state-of-charge thresholds. The determined stack current magnitude may be the lowest current magnitude that provides sufficient heat to maintain a coolant temperature at the coolant temperature setpoint or within the coolant temperature threshold. The determined stack current magnitude may be the highest current magnitude that provides sufficient power while maintaining a coolant temperature at the coolant temperature setpoint or within the coolant temperature threshold.

Abstract: A stack current controller may be configured to determine a stack current request based on a state of charge of a battery, an error based on a difference between an actual coolant temperature and a coolant temperature setpoint, or both. A plurality of stack current levels may be implemented corresponding to different battery state-of-charge thresholds. The determined stack current magnitude may be the lowest current magnitude that provides sufficient heat to maintain a coolant temperature at the coolant temperature setpoint or within the coolant temperature threshold. The determined stack current magnitude may be the highest current magnitude that provides sufficient power while maintaining a coolant temperature at the coolant temperature setpoint or within the coolant temperature threshold.

Abstract: Sound suppression devices may include a baffle system or stack having a plurality of baffle disks where at least a first portion of the disks include a first set of gas ports and at least a second portion of the disks include a second set of gas ports. The baffle system may be configured to act as a compressing piston. When a bullet leaves a muzzle of a firearm and enters a suppression device, the baffle system acts as a compressing piston and moves forward with the gas pressure caused by the firing of the bullet. As the bullet begins to enter each baffle disk, the pressure starts to subside until there is a point where there is equalization between gas pressure and, for example, tension on a piston spring within the baffle system. After this point, the piston is driven back into place by the releasing of the spring tension.

Abstract: The present invention is a light weight decorative wood beam system. The wood beam system is comprised of at least two wood beam pieces. The wood beam pieces each have a bottom plate and two vertical plates that form a three-sided, hollow box. Each wood beam piece comprises an end with a male dado and an end with a female dado. The male and female dado ends fit over each other to create a shiplap joint. Anchor plates are fastened into a building surface and support the wood beam system. Because the wood beam system is light weight, it does not require a special anchoring system to support the real wood beams.