HiVOLT describes the market introduction of a stationary battery storage system, which significantly increases the application possibilities of battery storage and achieves an unprecedented price-performance ratio. The solution is based on a new technology, the high-voltage storage technology, which significantly revolutionizes the current storage approach. Until 2018, high-voltage technology had only been introduced in small quantities in one vehicle class (upper class) in the automotive sector. We have taken the next step towards stationary applications for the broad mass market. Instead of the low voltage range (50 V alternating voltage), the HV70 of TESVOLT works in a voltage range of 700 V. This promises a significant increase in efficiency and cost reductions. Savings result from the elimination of transformers and reduced system costs due to lower currents.
This technological leap was made possible by several TESVOLT innovations. In high-voltage storage technology, for example, several battery storage units must be connected in series - highly complex with appropriate regulation of the currents and voltage of individual battery modules. TESVOLT has developed and patented a unique high-voltage battery management system - the ABO. It can detect differences in the high-voltage battery system and optimize each individual battery cell within a battery module via cell balancing. Further innovations in high-voltage lithium storage are the static switch, the built-in prismatic cells and the modular design of the automatically mountable battery modules. All in all, these innovations offer outstanding cost-effectiveness.
The market for this new generation of stationary battery storage products is gigantic. The higher the proportion of volatile energy fed into the power grid, the greater the growth in electricity storage demand. All over the world, energy grids need flexibility in order to compensate for fluctuations in the supply of wind and PV. Battery storage systems will become system-relevant for all energy networks with a high proportion of renewable energies. Battery storage systems are a key technology in the energy revolution - and can be used for a wide variety of applications.
The technical and commercial objectives defined in the project were largely achieved. HV70 was introduced to the market in many European countries. International projects in Asia, Latin America and Africa complement this. Specifically, our high-voltage storage system meets the following customer requirements:
1) Reduction of the acquisition costs of battery storage systems. Automated production has made it possible to reduce the investment costs per kWh under 600 €/kWh and to lower the specific electricity storage costs to 0.08 €/kWh.
2) Ensuring a safe and reliable power supply. TESVOLT HV70 reliably compensates for fluctuations between power generation and consumption, which serves to stabilize the power supply. Flexible and modular battery storage system enables a controllable energy supply
based on renewable energies.
3) Increasing the application possibilities of battery storage systems in the size range between single-family homes and wholesale markets. Economic multiple use of battery storage (e.g. for the provision of control energy).
4) Reduction of peak power through the use of battery storage. TESVOLT HV70 has been designed to be compatible with a three-phase inverter (allowing connection to the public grid).
5) Enables our target users to generate electricity in an effective and environmentally friendly way. In combination with battery storage, renewable energy sources provide an optimal solution for remote locations. They guarantee a reliable power supply without any
failures. TESVOLT's high-voltage storage can store energy very quickly and release it just as quickly, which is a major competitive advantage.
