Ambri - Model LMB - Energy Storage Systems
Integrators will offer energy storage systems in ready-to-install DC containers for applications that require high energy capacity, frequent cycling, long life and high efficiency. Cells are connected within a thermal enclosure to form a MWh scale Ambri-based system. The system is insulated and “self-heating” when operated, requiring no external heating/cooling to keep the batteries at operating temperature. Multiple systems placed together on site are connected in parallel.
- Capacity: 1000 kWh, 250 kW
- DC Efficiency: exceeds 80% under wide range of use cases
- Response time:
- Voltage: 500 —1500 V
- Footprint: 10-foot shipping container
- Dimensions (including high temperature seal) : 216 mm L x 137 mm W x 254 mm H (8.5” x 5.4” x 10.0”)
- Mass : 56 lbs
- Cell enclosure material : Stainless steel
- Nominal OCV : 0.95 V
- Nominal capacity : 800 Ah
- Nominal continuous power : 160 W
- Cycling voltage range : 1.25 – 0.5 V
Specifications subject to change without notice and not intended for use as design reference. Contact Ambri for latest information.
The liquid metal battery is comprised of a liquid calcium alloy anode, a molten salt electrolyte and a cathode comprised of solid particles of antimony, enabling the use of low-cost materials and a low number of steps in the cell assembly process.
The active materials in Ambri’s cells reversibly alloy and de-alloy while charging and discharging. This process does not suffer from the degradation mechanisms that cause capacity fade in other chemistries.
At room temperature, Ambri’s cell is non-conductive and its active materials are solid metals and a solid electrolyte. Upon heating to 500˚C temperature, Ambri-based battery systems operate at maximum performance level no matter the external temperature and require no power-hungry air conditioning.
Ambri-based systems generate their own heat during use, thereby eliminating the need for auxiliary power for temperature control. These systems like to be used – a full charge/discharge cycle at least every two days will keep the system at its operating temperature and higher duty cycles will not increase degradation.
Ambri-based systems are expected to be packaged in 1000VDC, MWh-scale containers. These containers will be factory assembled and shipped to site fully populated and sealed. Each of these containers will contain no replaceable or serviceable components. This eliminates on-site maintenance and means that the container becomes the modular and replaceable system component. Typically with blocks of 10 or more containers connected in parallel at the DC side of site PCS, system reliability is achieved through N+1 redundancy at the container level.
Ambri cells utilize electrodes comprised of commodity materials that cost 1/3 of those in NMC lithium-ion cells. The manufacturing of Ambri cells is far simpler and requires 1/3 to 1/2 the capital expense per MWh of production than lithium-ion. Furthermore, Ambri-based systems do not have cooling, fire suppression or module- and rack-based BMS equipment as lithium ion-systems require. For these reasons, long-duration Ambri-based battery systems are half the cost of lithium-ion when comparing 20-year, eight-hour-duration systems.
Lithium-ion batteries are projected to drop in price from current levels to less than $100/kWh at some time in the mid to late 2020s. Even compared to this low future lithium-ion price of $100/kWh, these energy storage systems will be 70% more expensive than Ambri-based battery systems.
No risk of combustion
Ambri energy storage systems will answer the world-wide need for grid storage with an efficient and safe system. As lithium-ion batteries have flooded the market for grid storage, opportunities for safer, longer life batteries for long-duration applications have emerged.
To date over 20 lithium-ion energy storage systems have resulted in explosions or fires. Ambri batteries are not explosive, combustive or temperature sensitive. No level of overcharging, over-discharging, short circuiting or temperature has caused any safety concerns with these cells.
Ambri is currently engaged with the world’s leading agencies for the development of an appropriate set of tests to certify the safety of Ambri cells.
Reliable + safe
Ambri cells operate with no moving parts in a simple construction that is completely sealed. Systems are designed to provide a redundant system configuration.
After commissioning, the systems do not require heating or air conditioning. They are self-heated and self-regulated. Uniquely, Ambri batteries work best when used daily, unlike lithium-ion batteries that degrade faster with more use.
The batteries are free from the dangers plaguing other batteries, and are tolerant of short circuits, over-charge, and over-discharge. They are not susceptible to combustion (thermal runaway) or ignition from external fire sources. Made with low toxicity substances which are not subject to RoHs restrictions, Ambri cells are safe for transportation and usage worldwide.
The calcium and antimony electrodes in Ambri cells are less than one third the cost of the lithium, nickel, manganese and cobalt in the most common lithium-ion cells. Ambri cells are projected to be priced at less than lithium-ion cells for commercial deliveries starting in 2022.
Lowest system capital cost
Ambri-based systems do not need cooling, fire suppression or module and rack based battery management system equipment, as lithium-ion systems require. Due to minimal degradation, Ambri cells do not require additional energy capacity at the beginning of life or a mid-life augmentation in order to achieve 20 years of operating life. For these reasons, Ambri-based systems are projected to cost 30% – 50% below equivalent lithium-ion systems from 2022 – 2030 even after accounting for the aggressive cell price reductions that are forecast for the incumbent product.
Low operating cost
Ambri-based systems operate without the auxiliary electricity cost for cooling which is an enormous advantage in hot environments where most solar-plus-storage installations are located.
The materials inside the system, calcium and antimony, are commonly available as commodities and sourced from multiple locations.
Each GWh of Ambri batteries requires less than 1% of current annual production of these anode and cathode materials.
No cobalt is used in Ambri batteries, a common ingredient in lithium-ion batteries.
- Pre-fabricated for rapid deployment demands
- On site installation of pre-fabricated Ambri-based systems are more rapidly deployed than today’s energy storage technologies that require on-site system assembly. This more closely aligns the installation of Ambri’s energy storage systems with the speed of solar installations.
- 100MW of solar power plus Ambri storage would be installed within six months. Conventional power plants require over five years.
- Scalable to meet demand for GWh-sized deployments
- For GWh-sized deployments, Ambri-based 1-MWh systems are modular and scalable to meet demand.
- Easily manufactured cells mean low-cost production plants in each major region.
- 20+ years lifetime
- Expect tens of thousands of cycles and decades of operation without the degradation experienced by other battery chemistries.
Not temperature sensitive
- High performance no matter the outdoor temperature.
- Ambri batteries operate at an internal temperature of 500˚ C which is not dependent on ambient temperature.
- Warm climates? Ambri systems operate at maximum performance level no matter the temperature and require no power hungry air conditioning. And, if you need grid-level storage in the Arctic Region, the cold temperatures will have no effect. Ambri batteries are not explosive, combustive, or subject to thermal runaway.
Rapid response capability
- Consumers expect electricity at all times without brownouts, blackouts or voltage spikes.
- The system is able to provide fast response for frequency regulation applications, while also offering long-duration performance for reserve capacity markets.
- GreenAmbri batteries are responsibly produced and their materials can be reused.
- The units are made with commonly available and low toxicity materials that are easily recyclable.
- Ambri-based systems, which shift energy from peak generation time-of-day to low generation periods, will enable large-scale solar and wind farms to replace coal, oil and natural gas peaker plants.