TENNANT N.V. Patent applications |
Patent application number | Title | Published |
20120043917 | Battery Connection System - A method of operating an electric vehicle including the steps of: (1) providing the electric vehicle (2) providing an electric load device on the electric vehicle (3) providing a first battery on the electric vehicle with a first state of charge (4) providing a second battery on the electric vehicle with a second state of charge lower than the first state of charge (5) determining an initial state of charge of the first battery (6) determining an initial state of charge of the second battery (7) connecting the first battery to the electric load device (8) measuring the current flow from the first battery (9) calculating an instantaneous state of charge of the first battery (10) comparing the instantaneous state of charge of the first battery with the initial state of charge of the second battery, and (11) when the instantaneous state of charge of the first battery reaches a predetermined percentage of the initial state of charge of the second battery, connecting the second battery in parallel with the first battery. | 02-23-2012 |
20110180104 | Sweeping Machine - A method of operating a sweeping machine, including a battery, a positioning receiver, a battery charge monitoring system and a computer, and having a cleaning and a transport mode of operation The method comprising the steps of: a) providing the computer with the location of a charging station, b) using the positioning receiver to provide the computer with the location of the sweeping machine, c) using the computer to provide an estimate of an amount of energy required to drive the sweeping machine from its location to the charging station in the transport mode, d) using the battery charge monitoring system to provide the computer with the amount of energy remaining in the battery, e) using the computer to compare the estimate with this amount of energy, and f) providing an operator notification when the amount of energy remaining in the battery falls below a predetermined amount of the estimate | 07-28-2011 |
20110155488 | Cleaning Machine - A cleaning machine having two front wheels and two rear wheels supporting a chassis, the chassis having a central spine, the cleaning machine including a first electrical cell for propelling the cleaning machine, said first electrical cell being positioned between one of the front wheels and one of the rear wheels and outboard of the central spine. | 06-30-2011 |