badge_multi_cell_clear
Today we achieved our fifth target milestone – assembling and operating a multi-cell Gridtential battery.

What is the Multi-Cell Battery Milestone?

This milestone demonstrates that Gridtential’s proprietary bipolar plates can be used to build an operating multi-cell battery.

Why is this an important milestone?

A single-cell battery operates at around 2 Volts. Typical real-world applications for batteries operate at much higher voltages: from 12 Volts to 380 Volts and up. The ability to “stack” single cells together to create a higher-voltage battery is therefore a key requirement for a commercial battery. With the achievement of this milestone, Gridtential has demonstrated:

  • Linear scaling of the battery voltage per cell
  • Many deep discharges (to 80%) and re-charges of the battery
  • Increased linear cell density from 1.5 to 3.3 cells per centimeter – previously a separate milestone that we have achieved early
  • Repeatable multi-cell build and test platform, including updated cycling and monitoring circuitry
  • A fixture & process for creating Active Mass on multiple plates at once, increasing our plate throughput
  • A test stack design that allows for non-destructive disassembly of the cells for post-operating analysis of the individual battery plates. The test cell casings are re-usable.

What are the next key milestones?

  • Grant Project #1 Completed – demonstration and documentation of the key performance criteria of a multi-cell Gridtential battery for the California Energy Commission EISG grant project
  • Active Mass Adhesion – improvement in the adhesion & durability of active mass on each side of the bipolar plates
  • Active Mass Porosity – demonstration of ability to control porosity and other Active Mass characteristics during the fabrication process
  • Full-Size Plate – Manufacture of the first full-size battery plate using the fabrication processes and techniques developed thus far.
  • First Alpha Unit – delivery of the first Alpha Unit for external testing in both a laboratory setting and in a real application

The multi-cell battery build process enabled the Gridtential Engineering team to tune the Active Mass fabrication process and significantly improve the monitoring & control circuitry. This has resulted in higher performance as well as more accurate and reliable data capture. Go team!

We look forward to sharing further updates with you as they are available. Thank you for your support of Gridtential Energy.

 

badge_single_cell_clear

Today we achieved our third target milestone – building a single-cell battery.

What is the Single Cell Milestone?

This milestone moves us away from the “beaker cell” to a new single-cell development platform. The achievement of this milestone shows our ability to form advanced battery plates, secure them into a cell casing and cycle the cell successfully.

Why is this an important milestone?

The single cell is the basic unit that will be used to build full-scale batteries with higher current and voltage. Our new single-cell development platform demonstrates:

  • Control of the footprint of the active mass during formation
  • Validation of the cell casing that will be used through our alpha testing phase
  • No leakage around the plates – a key concern in bi-polar batteries
  • A uniform environment for material & process optimization

What are the next key milestones?

  • Bi-Polar Plate – formation of a single plate with an anode on one side and cathode on the other
  • Multi-Cell Battery – assembly of multiple cells to create a higher voltage battery

The Gridtential engineering team has once again gone above and beyond – along with achieving this milestone, they have built a number of tools and capabilities into our test platform and performance database so that our development process will be fully data-driven.

We look forward to sharing further updates with you as they are available. Thank you for your support of Gridtential Energy.

badge_bipolar_plate_clear

Today we reached our fourth target milestone – fabricating bipolar battery plates.

What is the Bipolar Plate Milestone?

This milestone demonstrates that our scalable manufacturing process can be used to form both anode and cathode (positive and negative) surfaces on each side of a single battery plate, which is a critical requirement for building multi-cell, bipolar batteries.

Why is this an important milestone?

In a bipolar battery, electricity flows through the battery plates rather than into and out of single cells wired in series. This architecture reduces the internal resistance of the battery and reduces weight & complexity by eliminating the need for cell-to-cell wiring. With bipolar plates, we can now “stack” an arbitrary number of bipolar plates to create a multi-cell battery of the desired voltage. The process we have developed for creating bipolar plates demonstrates:

  • Two separate methods for creating bipolar plates, which we can optimize and compare
  • A repeatable process for each manufacturing method that allows us to control characteristics of the active mass
  • Validation of the current flow through the bipolar architecture
  • An improved casing assembly method that eliminates a major component and further reduces leakage risk

What are the next key milestones?

  • Multi-Cell Battery – assembly of multiple cells to create a higher voltage battery
  • High Linear Density – increase the number of cells per centimeter in a multi-cell battery
  • Grant Project #1 Completed – demonstration and documentation of the key performance criteria of a multi-cell Gridtential battery for the California Energy Commission EISG grant project
  • Active Mass Adhesion – improvement in the adhesion & durability of active mass on each side of the bipolar plates
  • Active Mass Porosity – demonstration of ability to control porosity and other Active Mass characteristics during the fabrication process
  • Full-Size Plate – Manufacture of the first full-size battery plate using the fabrication processes and techniques developed thus far.
  • First Alpha Unit – delivery of the first Alpha Unit for external testing in both a laboratory setting and in a real application

The Gridtential engineering team met this milestone with not one, but two separate and repeatable methods for building bipolar plates. In addition, several key processes and components have been improved and built-in to our cell manufacture and testing platform.

We look forward to sharing further updates with you as they are available. Thank you for your support of Gridtential Energy.

First Cycle Badge

Today we achieved our second target milestone – a repeated charge and deep discharge cycle of the Gridtential battery plates.

What is the First Cycle Milestone?

This milestone demonstrates that the active material formed by Gridtential’s unique process is resilient through repeated charge and discharge cycles. A “beaker cell” using Gridtential proprietary battery plates was charged and then deeply discharged multiple times. The capacity of the beaker cell held constant for multiple cycles where discharge times were in excess of one hour.

Why is this an important milestone?

A key benefit expected from our proprietary plate formation process is a durable active mass that will have a long cycle life under deep discharge conditions. This test showed that:

  • The adhesion of the active material to the plate surface is good even without the use of binders.
  • The active material can be conditioned to reach its full capacity.
  • We now have programmatic platform for creating, conditioning and testing battery plates with granular data capture capabilities.

What are the next key milestones?

  • Bi-Polar Plate – formation of a single plate with an anode on one side and cathode on the other
  • Single Cell Battery – installation of plates with active material into an open cell
  • Multi-Cell Battery – assembly of multiple cells to create a higher voltage battery

This milestone was achieved ahead of schedule and resulted from the creation of a solid experimental platform and a series of creative experimental approaches. The Gridtential technical team rocks!

This achievement would not have been possible without the continued assistance and dedication of our first Strategic Partner, Intevac. Thank you to the Intevac team!

We look forward to sharing further updates with you as they are available. Thank you for your support of Gridtential Energy.

badge_first_voltage_clear

Today we achieved our first target milestone – demonstrating that Gridtential’s unique battery plates can be charged and generate full voltage.

What is the First Voltage Milestone?

This milestone is a successful demonstration of Gridtential’s novel and proprietary process of creating active material on the battery plates. After both anode and cathode plates were fabricated, the plates were submerged in a “beaker cell” and charged. Once charged the test cell generated full voltage potential and held that potential for an extended period.

Why is this an important milestone?

Previous proof of concept tests, performed in a University environment, were based on simulations of some of the key fabrication processes because the real manufacturing equipment was not available. This test showed that:

  • Use of the real manufacturing equipment resulted in superior active material
  • The voltage generated indicates good active material characteristics
  • The active material formation process is controllable and repeatable

What are the next key milestones?

  • First Cycle – a repeated charge and discharge of the active material
  • Single Cell – installation of plates with active material into an open cell
  • Multiple Cell – assembly of multiple cells to create a higher voltage battery

This milestone was achieved ahead of schedule by a technical team that has only been together for a short time. It is exciting to work with such a professional and productive team!

This achievement would not have been possible without the expert assistance and dedication of our first Strategic Partner, Intevac. Thank you to the Intevac team!

We look forward to sharing further updates with you as they are available. Thank you for your support of Gridtential Energy.