An over-discharge diagnosing method includes, among other things, evaluating concurrently, a voltage behavior of a battery pack, a current behavior of the battery pack, and a temperature behavior of the battery pack. The method further includes detecting an over-discharge based on the evaluating, and communicating an over-discharge notification in response to the detecting.

A lift device comprises a base, a linear actuator, and a rechargeable battery system. The linear actuator is configured to selectively move a work platform between a raised position and a lowered position. The linear actuator includes an electric motor. The rechargeable battery system includes a battery, a heating system, and a battery charger. The battery is configured to power the electric motor of the linear actuator. The battery charger is configured to simultaneously charge the battery and provide power the heating system to heat the battery.

A lift device comprises a base, a linear actuator, and a rechargeable battery system. The linear actuator is configured to selectively move a work platform between a raised position and a lowered position. The linear actuator includes an electric motor. The rechargeable battery system includes a battery, a heating system, and a battery charger. The battery is configured to power the electric motor of the linear actuator. The battery charger is configured to simultaneously charge the battery and provide power the heating system to heat the battery.

Computer-implemented methods and computer systems are disclosed herein as implemented by a controller operatively coupled to a network of electric vehicles. The methods and systems include the controller (i) receiving a notification that an electric vehicle is stranded without sufficient power to operate; (ii) receiving information regarding the stranded electric vehicle; (iii) detecting one or more other electric vehicles in a vicinity of the stranded electric vehicle; (iv) receiving information regarding the detected one or more other electric vehicles; and/or (v) determining, based upon the received information, which of the detected one or more other electric vehicles to send a power source request. Alternatively, the notification may indicate that an electric vehicle has a low state of charge (SOC), or is otherwise has a battery in need of being recharged to facilitate the electric vehicle traveling to a destination.

In order to manage power exchanged between an electric vehicle 1 and a house system 2 including an electric device 22, a power management device includes a vehicle detection portion 26 configured to detect a vehicle available for a resident of the house. A controller 24 determines power supplied from the electric vehicle 1 to the house system 2 in accordance with the presence of the vehicle detected by the vehicle detection portion 26. The power management device can thereby supply power from an electric vehicle to a house while securing the situation where the resident can move by vehicle in emergencies.

Disclosed is a battery management unit. The battery management unit according to the present disclosure can prevent performance of an erroneous control algorithm by executing an infinite loop when an error occurs on a communication line.

A method for managing an authorized operating range of a battery, the authorized operating range being limited between a minimum level and a maximum level of state of charge of the battery. The method includes estimating a state of health in power of the battery, the state of health in power characterizing capacity of the battery to supply a minimum required power level across an entirety of the operating range; and determining the minimum level of state of charge of the battery in accordance with the estimated state of health in power, the minimum level of state of charge being increased when the state of health in power decreases.

A DC/DC converter for a hybrid vehicle, a battery energy management system having the DC/DC converter and the corresponding hybrid vehicle. The DC/DC converter is configured to control an output voltage to be output to the low voltage grid in accordance with a battery status parameter information and/or a vehicle running status parameter information in the high voltage grid or the low voltage grid. This enables the state of charge of the low voltage battery pack to be in an appropriate range, and a space for storing the free energy is provided, which means more fuel saving. According to different vehicle running modes, the DC/DC converter can automatically control the output voltage to be increased or reduced.

This disclosure provides systems, methods and apparatus for an energy storage system. In one aspect, the energy storage system includes a controller configured to connect a first capacitor system and a second capacitor system in series with an output of a battery system during a high current demand event such that the voltage of the output of the battery system is supported within the voltage constraints of the output of that battery system.

Provided are systems and methods for a public standard interface including a Battery Management System that allows for communication between an alternative energy source and a material handling vehicle. The alternative energy source may be a Lithium Ion Battery, a fuel cell, or another non-lead acid based battery. The Battery Management System is coupled with a CAN bus that allows for communication between the material handling vehicle and the alternative energy source. The CAN bus communicates information such as a type of the energy source, energy output limits, electric current limits and information such as an energy demand profile of the vehicle. Also included is an interface between the Battery Management System and Charger Control System.