Petalite have developed technology and IP for commercially ready systems to supercharge batteries in a significantly safer environment to 100% in under 15 minutes. Petalite’s Sinusoidal Direct Current. (S.D.C) Supercharging is a unique technology that is 4x faster than leading battery system competitors, saving time, an extremely valuable asset to the customer.
The Petalite charging technology is safer than traditional charging methods and scalable to meet customer requirements.
S.D.C Supercharging Explained
Compared to the traditional charging method of Direct Current (D.C) that is employed today’s charging infrastructure, Petalite developed Sinusoidal D.C Supercharging (S.D.C), creating a current wave in sync with the A.C frequency from the wall outlet. Petalite’s waveform operates in a unique way in that it operates in sync to the grid frequency and is always above zero amps (compared to A.C).
Traditional D.C Charging
Engineered for Performance
Manufacturer datasheets provide guidance on cell charging and other specifications, however charge times are limited by the worst performing cell during lab tests (plus a margin of error). Petalite’s charging technology is able to individual test every cell for internal impedance meaning charge rates well beyond the manufacture limits are achievable without accelerated degradation.
Existing Safety Solutions
Existing methods of safety protection for lithium-ion cells are limited to voltage detection plus cell temperature measurement. The use of cell temperature measurement is problematic as temperature is the ‘effect’ and not the ’cause’ of cell damage and has a delay of several seconds.
Engineered for Safety
Petalite’s technology allows the detection of the ’cause’ by analysing cell resistance and impedance up to 100 times per second, significantly faster than existing methods. The technology also learns from other deployed chargers and the history of the battery in order to charge at optimal safety levels.
S.D.C Impedance Measurement
D.C Impedance Measurement
Data is Key
The ability to sample the internal impedance of the battery during the whole charge cycle under load is important. This information, combined with traditional sensing allows the battery to indicate the health, state of charge and age to the charger from beginning to end. This means that the battery is selecting the optimal charge rate during the whole charge cycle. Compare this to traditional chargers where the power settings are standard and the charger is looking out for either high voltage or high temperature, btoh poor indicators.
S.D.C Supercharging Features
On-Line Impedance Measurement
Petalite’s S.D.C.S technology enables advanced battery feedback and monitoring beyond traditional sensing methods such as voltage and temperature. Significantly improving safety and performance.
Battery Condition Monitoring
Combining on-line impedance measurement with other variables allows cell level analysis at up to 100Hz, with life-cycle prediction and constant faulty cell detection faster than traditional variables i.e temperature measurement.
New PCB Architecture
The hybrid Flyback / S.D.C.S architecture can be integrated into any new / existing product development cycle.
Advanced I.O.T integration and global connectivity enables the Petalite charging system to adapt to local environmental conditions and learn histories of other battery cells, improving safety and performance.
Battery Asset Management
Petalite’s Asset management platform combines machine learning and condition monitoring to predict residual value in battery systems throughout large deployments.
Lower B.O.M costs
Petalite’s S.D.C Supercharging technology allows the use of simplified Flyback / S.D.C.S topology up to and beyond 1kW and no high voltage aluminium electrolytic capacitors.
Ready to Intergrate
Petalite work with existing product design teams to incorporate the fast charging technology into your product within a minimum time frame and minimum cost for tooling.
Longer Life hardware
Silicon carbide mosfets and zero high voltage aluminium capacitors equals a higher mean time between failure compared to traditional charging topologies.
Ready to Integrate
Petalite’s S.D.C Supercharging technology utilises the latest, mass produced hardware to enable rapid integration and expansion without the delays in ramping up production for specific components or materials. Below you can see an example of the algorithm running on a modified hardware system to provide a full charge in under 15 minutes.
The Petalite S.D.C Supercharger has only one power stage on the High Voltage primary side. This battery charger is power factor corrected without the need of a Power Factor correction (PFC) pre-regulator stage. The AC current drawn from the mains is always in phase with the mains AC voltage, i.e. the power factor (cos φ) is always higher than 0,9.
A single staged battery charger means fewer components (no boost inductor, no high voltage electrolytic capacitors, no blocking diode, no PFC controller, no PFC power MOSFET) resulting to lower cost, higher reliability, higher efficiency, higher power density.
Frequently Asked Questions
Can S.D.C Supercharging damage the cell?
S.D.C Supercharging allows the battery to request the maximum power based on the battery health, utilising 100% of the cell potential and not stressing the cell beyond its chemical capabilities. This is opposite to traditional charging that supply the maximum power then wait for a reaction from the cell via slow heat and voltage.
Does S.D.C Supercharging use specialist hardware?
All hardware used in the S.D.C Supercharging system is already being mass produced through several manufacturers, meaning that quick adoption and large scale-ups are achievable without concerns of supply chain issues. Petalite also use a license based model which means OEM’s can control their supply chain.
Is S.D.C Supercharging technology ready for integration?
Petalite’s core technology has been fully developed and tested in labs using current mass produced components. Meaning it is ready to integrate today into new and existing product lines; once agreements have been signed the typical time frame is 8-12 months for product integration, lining up with typical hardware development time scales.
What battery chemistry can be used with S.D.C Supercharging?
S.D.C Supercharging is able to work with the lithium-ion based family of cells for fast charging and has currently been tested on LiFePo4 cells for 15 minute charging currents. Lead Acid cells are also able to be used for cell health monitoring but will not fast charge.