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Active Battery Management System

Technology Overview

The proposed technology relates to a battery management system (BMS) equipped with active cell balancing technology and sophisticated state-of-charge (SOC) prediction algorithms. Using this algorithm, faster cell balancing can be achieved during charge and even discharge operations as compared to conventional passive cell balancing technology. This allows the BMS to maximise net energy output from the battery system during its service life. Ultimately, the BMS increases driving range and reduces battery repair/replacement cost.

The technology owner is seeking partners to collaborate in various modes including technology licensing, consultancy project, research collaboration, etc. 

Technology Features & Specifications

  • Battery cell imbalance < 10mV (nominal base voltage of 80V)
  • Prolong battery stack lifetime > 15% longer as compared to a configuration without cell balancing
  • Integrated balancing and advanced SOC prediction
  • Modular and stackable architecture
  • Intelligent protection
  • Multi-mode operation leading to improved operational efficiency

Potential Applications

  • Electric vehicle (EV)
  • Energy storage (ESS)
  • Micro-grid
  • Mobile station
  • Maritime and military applications

Market Trends and Opportunities

According to KDB Daewoo Securities, the size of the global rechargeable battery market is estimated at US$17bn,including US$12bn for IT device batteries, US$4bn for EV batteries, and US$1.6bn for ESS batteries. While the market is small compared to other IT segments (US$300bn for semiconductors and US$100bn for LCD), rechargeable batteries’ medium- to long-term outlook is bright, as focus is shifting from small- to medium-area cells to large-area cells (EV- and ESS-use). An EV battery requires 1,000 times more capacity and is 1,000 times more expensive than a notebook battery (5,000 times vs. mobile phone batteries). Thus, even the smallest rise in EV or ESS demand should have a pronounced impact on the rechargeable battery market. If EVs were to account for 1% of annual vehicle sales volume (based on the current figure), the annual rechargeable battery capacity of new EVs would be equivalent to that of 800mn notebooks (2013 sales: 180mn notebooks) or 4bn mobile phones (2013 sales: 1.9bn phones). The size of this market is a good indication of potential for battery management system, which is an essential part of all such battery. 

Customer Benefits

  • High power density
  • High efficiency
  • Long duration of discharge
  • Long lifetime of battery
  • Cost competitive

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