U-Charge® Advanced Energy Systems and Management Systems are a family of 12V, 18V & 36V battery modules offering twice the run-time at less than half the weight of similar sized lead-acid batteries.

In commercial use since 2006, U-Charge XP® products are used in a wide variety of cutting edge applications including automotive & marine transport, industrial, military and stationary equipment.

Systems are maintained and constantly monitored by customers using U-Charge® XP Accessories, facilitating intelligent system management and dynamic Command and Control.

U-Charge® XP offers a scalable, modular approach, with configurations in excess of  700 volts and 1,000 Ah in custom solutions. The modules are packaged in standard lead acid BCI format sizes suited for a huge variety of applications.

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• Thousands of cycles, 100% DOD, (normal conditions)
• Maintenance free
• Internal cell balancing
• Modules communicate via Battery Management System (U-BMS)
• Rugged mechanical design with terminal covers
• LED battery status indicator
• Automotive type connectors
• Enhanced SOC algorithm
• Increased balance to current to reduce charge time
• Case redesign enables stacking of units on UEV model
• Backward compatibility with older U-Charge models

In terms of cycling performance Valence lithium iron magnesium phosphate cathode materials display excellent characteristics. Current cycling demonstrates minimal linear fade reaching over two thousand eight hundred full one hundred percent charge and discharge cycles to eighty percent depth of discharge.

• U-Charge® XP Discharge Performance @ 23^oC
• U-Charge® XP Life Cycle Performance
• U-Charge® XP Temperature Performance
• U-Charge® XP Charge Performance

U-Charge® Management Systems comprise a range of peripherals specifically tailored to achieve optimum usage of 12V and 19V Valence Lithium Iron Magnesium Phosphate battery modules.

• U-Charge® XP Battery Management System

Valence battery management system (BMS) designed for use with U-Charge® XP battery module systems. The BMS provides numerous system integration and options and facilitates temperature, voltage, current and state-of-charge monitoring. One single BMS is capable of managing up to 128 U-Charge® XP battery modules.

• U-Charge® XP Diagnostics Kit

The U-Charge® module diagnostics toolKit includes an RS485 to USB converter which enables a battery module to communicate directly with a PC without the need for a battery management system.

• U-Charge® CANbus Toolkit

The CANbus ToolKit includes a CAN to USB converter, plus associated application software, that enables a user to easily monitor and/or log the data being transmitted onto the CANbus by the U-BMS. No prior experience of CAN communications is required as the application software translates all of the U-BMS CAN messages into engineering units and shows this data in a simple display window. If logging is activated the data is saved to file in a CSV format.

Comparing U-Charge® LiFeMgPO4 to other chemistries

U-Charge® XP Lithium Iron Magnesium Phosphate (LiFeMgPO4) modules have considerably greater energy density making them particularly suitable for numerous applications. LiFeMgPO4 is considered safer, less toxic, and more energy efficient with significantly longer cycle life.

Compared to Lead Acid
Commonly used in starter batteries for internal combustion engine (ICE) vehicles Lead Acid is normally a low-cost secondary battery, composed of a Lead-dioxide cathode, a sponge metallic Lead anode and a Sulphuric acid solution electrolyte. The heavy metal element makes Lead Acid batteries toxic and improper disposal can be hazardous to the environment.

Disadvantages of Lead Acid batteries include

• Failure between several hundred and 2,000 cycles
• Comparatively low energy density,
• Long charge time
• Careful maintenance requirements

Compared to Nickel Cadmium (NiCd)
Disadvantages include:

• High rate of self-discharge at high temperature.
• Cadmium is highly toxic
• Use in batteries is controlled
• Environmental recycling issues
• Memory effect is one of the biggest disadvantages to using NiCd.

Compare LiFeMgPO4 to Nickel Metal Hydride (NiMH) suffers from:

• Poor charge retention
• Memory effect
• Higher cost 

Sodium (Na-NiCl2) so-called zebra battery.

• When not in use zebra batteries typically require to be left on charge, in order to be ready for use when needed.

• If shut down,the reheating process lasts 24 hours, and then a normal charge process of 6-8 hours is required for a full charge.
• Inefficiency due to energy consumption when not in use.