Advanced Command and Control
For use with the U-Charge® XP battery module range, the BMS is designed to enable multiple system implementation options.
Valence integrates battery management throughout the U-Charge® product line. Each U-Charge® battery contains internal circuitry to monitor and balance each cell. Through built-in communication cables, the modules are able to communicate to the U-Charge® Battery Management System (BMS), which monitors the system as a whole. The BMS initiates module-to-module balancing, as well as controls opening and closing the contactors. The BMS asserts warnings and alarms, and outputs data via digital and analog outputs. The BMS is small and compact, and can be mounted in the battery pack or remotely. It uses CANbus to communicate with other equipment and can control such items as chargers and fuel cells. The BMS can also connect to a PC/Laptop via the CANbus Monitoring Kit, for easy configuration, monitoring, or recording.
The Valence BMS comes in three voltage ranges, depending on the voltage of the pack that it is controlling.
|U-BMS-LV||for low voltage systems between 12 – 150VDC||12V enable||PN# 1004443|
|U-BMS-LVM||for low voltage systems between 12 – 150VDC; used in multi-BMS config||12V enable||PN# 1007427|
|U-BMS-HV||for high voltage systems between 100 – 450VDC||12V enable||PN# 1004440|
|U-BMS-SHV||for super high voltage systems 350 – 700VDC||12V enable||PN# 1004437|
- For systems between 700-1000V, we recommend using the BMS-LV and powering it off of the 12V key switch source.
Note that BMS offers battery pack isolation measurements up to 700V. For 700-1000V systems that require isolation measurement, an external 3rd party device should be used.
Some battery pack systems require multiple strings in parallel using one BMS per series string for redundant purposes. For these applications, we recommend using the BMS-LVM and power it off of the 12V key switch source. The BMS-LVM allows multiple BMS units to communicate on the same CANbus line without interference.
Each BMS requires a 12V source to turn it on. In some cases, a dc-dc converter may be added to the pack to convert the pack voltage down to 12V to provide power to the BMS as well as the contactors. The dc-dc should be able to supply at least 4 amps at 12V.