Spear’s lithium-ion batteries are astoundingly safe, lightweight, and reliable. They utilize green technologies for low emissions and increased fuel savings.

Spear is cell agnostic, meaning we can choose the very best cell for each project from any supplier in the world. We maintain close partnerships and work almost exclusively with world-class cell suppliers, such as Routejade and LG Energy Storage. In fact, in 2024, Spear was named an official battery pack manufacturer of LG. Working with high-quality cells is the first step in ensuring a safe battery.

Spear has in-house experts in BMS, thermal management, and passive propagation resistant design. We also have the in-house capabilities necessary to manufacture and test our batteries. Our extensive knowledge and capabilities make Spear your best choice for mission-critical batteries.

Today’s energy storage systems are complex and require a mastery of multiple engineering and scientific disciplines, which is why Spear’s technical team is made up of a combination of electrical engineers, software engineers, mechanical engineers, manufacturing engineers, scientists, program managers, and more. Whether installing a typical deployment of our COTS battery system or a new custom ESS, our applications engineers engage directly with our customers’ technical teams at the beginning of every project to fully define the ESS requirements and power system interfaces.

Our scalable BMS and modular battery pack strategy enables us to develop proof of concept units rapidly, cutting your time to market. We work together to design safe batteries and de-risk key performance criteria. When it comes time to flip the switch, Spear will be there alongside you with test results and diagnostic tools to make certain everything works according to plan - and Spear will continue to be there, with timely support and friendly service, whenever the need arises.

Spear is an expert in the robust, safe integration of lithium-ion cells into high-capacity, high-voltage strings. Spear’s commercial off-the-shelf (COTS) solution provides modular building blocks for the mechanical integration of prismatic pouch cells into energy storage systems from 100 VDC up to 1250 VDC with systems up to 10 MWh.

Our COTS system's proprietary thermal management design maximizes both cell life and operational range. The scalable modules are a key contributor to the ESS safety architectures, by assisting in the detection and mitigation of faults. It offers an industry-leading blend of thermal performance within a lightweight, compact volume, and patented passive propagation resistant design.

Spear's COTS system is a flexible battery solution, providing balanced energy density and power capabilities; while minimizing cost and lead time. This system is currently undergoing a mid-life upgrade, which is planned to be completed in Q2 2025.

Spear’s veteran team of hardware and software engineers has developed battery management components for portable electronics, unmanned vehicles, advanced weapons, aircraft, and large-scale stationary storage. Spear’s next-generation sBMS builds upon the lessons learned from both this breadth of experience and working with leading industry technology partners. The modular architecture allows for the same circuit and software blocks to be used for 12V to 1250V applications, as well as for deployments of individual modules versus dozens of parallel strings.

The sBMS works with all lithium-ion cell chemistries, giving customers a dependable, common communications interface across different applications, thereby compressing development and commissioning times. The state-of-the-art sBMS electronics gather the temperature and voltage measurements of each cell more quickly and precisely than other solutions, providing enhanced safety and more accurate prediction of the battery’s state of charge (SoC) and state of health (SoH)

Spear’s battery solutions start with electrochemical cells, which form the basic building blocks of rechargeable battery systems. As a cell-agnostic battery pack integrator, Spear works to select the right chemistry, cell format, and capacity for your application based on performance, cost, and quality objectives.

The Spear team has the unique vantage point of having developed lithium-ion cells. This deep expertise enables us to develop an intimate knowledge of our partner’s cells, ensuring you have the right building block for your battery system.

Unlike other battery cell manufacturers who attempt to force specific chemistries into less than ideally suited applications to keep their factories running at capacity, Spear is unencumbered to offer the optimum solution or provide you an unbiased comparison of your cost, performance, and life.

Spear’s thermal management strategies keep the battery safe and extend system life. Our in-house experts consider the cooling needs of each application, including thermal modeling to assist iterative design efforts and testing to verify the thermal models.

We have experience with passive, forced-air, liquid, and even immersion cooling solutions. We also implement heaters for extreme cold environments.

If all the protective strategies put into place fail, our talented mechanical engineering team designs our batteries to prevent propagation in the rare event a battery goes into thermal runaway. We have proven passive propagation resistance to a single-cell group for both pouch and cylindrical cells. In fact, Spear was recently awarded a patent for our passive propagation design.

Spear has extensive experience designing and manufacturing custom battery packs for harsh environments and mission-critical applications. We have worked with several of the largest aerospace & defense companies and have extensive knowledge in testing to the most difficult standards and certifications.

At Spear Power Systems, we specialize in designing and manufacturing custom energy storage systems with a focus on lithium-ion battery technology, engineered for harsh environments and mission-critical applications. As industry leaders, we have collaborated with major aerospace and defense companies, leveraging our extensive expertise and rigorous testing standards to ensure reliable and high-performance products that excel in challenging conditions.

Spear Power Systems is revolutionizing the future of aviation with our advanced lithium-ion battery technology, aiming to lead the electric aviation energy storage industry. Our innovative solutions will change the way we move around cities, making them cleaner, quieter, and more efficient. 

Our lithium-ion battery technology extends to all-electric and hybrid solutions. Contact Spear Power Systems today to learn more about our approach to revolutionizing electric aircraft with battery technology.