Week 6 Session 13

Discuss two new trends in battery system field.

Ans:-

key technology trends

1) Thermal Management :- of battery cells is of vital importance to the performance and longevity of any ESS system. With the exception of the number of duty cycles, and the age of the batteries, it has the greatest impact on performance.

The lifetime of batteries is greatly affected by the thermal management. The better the thermal management, the longer the lifetime combined with higher resultant usable capacity. There are two main approaches to cooling technology: air-cooling and liquid cooling, Sungrow believe that liquid cooled battery energy storage will start to dominate the market in 2022.

This is because liquid cooling enables cells to have a more uniform temperature throughout the system whilst using less input energy, stopping overheating, maintaining safety, minimising degradation and enabling higher performance.

2) DC-Coupled PV+ESS :- will start to play a more important role, as existing generation assets look to optimise performance.

PV and BESS are playing important role in the progress to net-zero. The combination of these two technologies have been explored and applied in lots of projects. But most of them are AC-coupled.

The DC-coupled system can save the CAPEX of primary equipment (inverter system/transformer, etc), reduce the physical footprint, improve conversion efficiency and decrease PV production curtailment in the scenario of high DC/AC ratios, which can be of commercial benefit.

These hybrid systems will make PV output more controllable and dispatchable which will increase the value of the generated electricity. What’s more, the ESS system will be able to absorb energy at cheap times when the connection would otherwise be redundant, thus sweating the grid connection asset.