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Battery Management System

A complete suite of electronic modules, ready to compose any type of BMS configuration for Lithium batteries, from the simplest to the most sophisticated configurations.
  • BMS Module: active cell balancing/equalization (up to 12 cells), data acquisition, protection and communication. Multiple BMS modules can be stacked to control batteries of any voltage/size.
  • MMI Module: man-machine interface, CANBUS connectivity, management and coordination of stacked BMS modules.
  • SAC Module: advanced data-logging capabilities with remote management through Internet interface.

Common features:

  • Cell Protection Protecting the battery from out of tolerance operating conditions is fundamental to all BMS applications. In practice the BMS must provide full cell protection to cover almost any event. Operating a battery outside of its specified design limits will inevitably lead to short life or failure. Apart from the inconvenience, the cost of replacing the battery can be prohibitive. This is particularly true for high voltage and high power automotive batteries which must operate in hostile environments and which are also subject to abuse by the user.

  • Charge control This is an essential feature of BMS. More batteries are damaged by inappropriate charging than by any other cause.

  • Demand Management While not directly related to the operation of the battery itself, demand management refers to the application in which the battery is used. Its objective is to minimize the current drain on the battery by designing power saving techniques to the applications circuitry, thus prolonging the time between battery charges.

  • SOC Determination Many applications require knowledge of the State of Charge (SOC) of the battery or of the individual cells in the battery. This may simply be to provide the user with an indication of the capacity left in the battery, or it could be needed in a control circuit to ensure optimum control of the charging process.

  • SOH Determination The State of Health (SOH) is a measure of a battery's capability to deliver its specified output. This is vital for assessing the readiness of emergency power equipment and is an indicator of whether maintenance actions are needed.

  • Cell Balancing In multi-cell battery chains small differences between cells due to production tolerances or operating conditions tend to be magnified with each charge / discharge cycle. Weaker cells become overstressed during charging causing them to become even weaker, until they eventually fail causing premature failure of the battery. Cell balancing is a way of compensating for weaker cells by equalizing the charge on all the cells in the chain,thus extending battery life.

  • History Monitoring and storing the battery's history is another important function of the BMS. This is needed not only to estimate the State of Health of the battery, but also to determine whether it has been subject to abuse. Parameters such as number of cycles, maximum/minimum voltages, maximum/minimum temperatures and maximum charging/discharging currents are recorded for subsequent evaluation. This can be an important tool in assessing warranty claims.

  • Authentication and Identification The BMS also allows the possibility to record information about the cell such as the manufacturer's type designation and the cell chemistry, which can facilitate automatic testing and the batch or serial number and the date of manufacture, which enables traceability in case of cell failures.

  • Communication Our BMS systems incorporate various communication interfaces to the charger, vehicle or supervisory systems. Communication interfaces are also needed to allow the user to access to the battery to modify the BMS control parameters or for diagnostics and tests.

BMS module [12 cells] Sealed Version

BMS module [12 cells] Sealed Version