Tsenter Inc. Li-ion Battery Management Technology

 Li-ion batteries, with their high energy density and need for protection against overcharging and cell imbalance, create a great challenge for the development of a total battery management system (TBMS). Tsenter Inc’s TBMS that includes optimal charging, diagnostic and prognostic algorithms, cell equalization, and safety subsystems, is a new approach to the management of all battery types, including Li-ion. A battery’s intrinsic electrochemical values such as ohmic resistance, chemical resistance, electrical double layer capacity (EDLC), and instantaneous and dynamic open circuit voltage (OCV) are collected, analyzed, and compiled into a matrix of battery parameters (MoP). Being electrochemical in nature, the MoP reflects the true battery condition relative to the point of charge, mass and heat transfer, in addition to the dynamics of battery degradation. Understanding the chemical nature of battery degradation through MoP treatment let’s proceed with optimization of battery operation.

General Principles:

•  Procedure for  measurement battery DC impedance,ohm and chemical polarization and resistance in process of charging through treatment current –time data in
• CC charging  or discharging modes.
• Optimization charging rate depending on battery impedance for battery swelling prevention.
•  Flexible charge termination point depending on battery temperature in order to stabilize structure of positive electrode.
• Recognition of battery wearing.
• SOC recognition in any sequence of battery operation.
•  Recognition of residual dischargng time based on voltage cut off, battery impedance and maximum discharging current.
• Flexible battery voltage cut off depending on battery impedance.
•  Software safety protection via recognition of soft, hard and chemical shunts .
•  Development math. model of battery operation with prediction capacity and power degradation level depending on cycle life and operational conditions.

Ni-Based and lead –acid batteries

 General Principles:  

• Precisely monitoring onset of oxygen production and taping current at that point for charging lead-acid batteries  
• Two step charge with lowing current at 90% state of charge for NiMH and NiCd batteries  
• Termination point as per decreasing of chemical polarization value (NiCd chemistry)  
• Recognition of residual discharging time  
• Flexible voltage cut off as per impedance measurement  
• Development math. model of battery operation with prediction capacity and power degradation level depending on cycle life and operational conditions.