As rechargeable batteries are integrated increasingly into various applications, optimal charging, storage, and discharge processes are essential to maximise operational lifespan. Power management solutions, including Power Management Integrated Circuits (PMICs) and Application-Specific Integrated Circuits (ASICs), are designed to meet these requirements for different devices, whether they are Internet of Things sensors or compact medical implants. Ideal power management for Ilika’s Stereax solid-state batteries (SSBs) should support versatile energy sources, accommodate batteries with diverse capacities and chemistries, and provide multiple output voltages. Other crucial functions include programmable voltage and current parameters, battery isolation to prevent leakage, temperature monitoring, and external capacitive support for stable power delivery.
Efficient charge management in these systems includes energy intake from various sources like AC/DC, solar, RF, and wireless power, alongside a two-stage process to initiate charging, followed by boosting to an appropriate level. Overcharging limits, particularly for Stereax SSB at 4V, are critical to prevent damage. The most effective method for charging Stereax SSB is constant current charging with a voltage cut-off to reach the battery’s full charge. Discharge management also requires setting a minimum voltage limit to avoid damage; for Stereax, this limit is set at 3V. Allowing for a delayed battery disconnection in pulsed loads can further protect against premature disconnections and ensure optimal battery usage without risking over-discharge.
A suitable power management solution provides regulated voltage outputs based on specific needs, allowing compatibility with components that operate on varying voltages. Logic signals enable communication with systems using microprocessors, which can relay vital battery status, including incoming power, battery readiness, and imminent power loss warnings. Battery disconnection at lower voltage limits should also minimise any residual current, with Ilika’s Stereax M300 having a disconnect level at 3V. Additionally, higher power needs can be managed by introducing a reservoir capacitance, though capacitors should be disconnected when not needed to prevent leakage.
A sleep mode to preserve battery life when energy is low or unavailable is essential for systems using solid-state batteries. A suitable power management circuit ensures that the Stereax battery supports its applications for the entirety of its intended lifespan. For further control, a microprocessor can monitor and regulate the power management setup, enabling greater efficiency and reliability across various applications.
Selecting the right power management solution is vital for harnessing the full potential of Stereax solid-state batteries, particularly in complex electronic applications. With programmable controls, voltage regulation, and robust charge/discharge management, these solutions promote extended battery life and enhanced functionality across diverse uses.
Ilika plc (LON:IKA) is a pioneer in solid state battery technology enabling solutions for applications in Industrial IoT, MedTech, Electric Vehicles and Consumer Electronics.
