Custom Battery Design Services

Battery design is a systematic, multi-disciplinary engineering process that optimizes every component and operational parameter of a battery to meet the specific functional, performance, and environmental requirements of its intended application. It integrates principles from materials science, electrochemistry, electrical engineering, mechanical engineering, and thermal science to create energy storage solutions that balance energy density, cycle life, safety, cost-effectiveness, and form factor. Unlike standardized off-the-shelf batteries, which are mass-produced for general-purpose use, battery design is application-centric—each design iteration is tailored to address the unique constraints of the device or system it powers, whether that involves miniaturization for wearable electronics, high power output for industrial equipment, or extreme temperature resilience for aerospace applications.

At its core, battery design encompasses the selection and optimization of raw materials, the structural configuration of individual cells, the assembly of cells into functional packs, the integration of thermal management systems, and the development of control logic to ensure safe and efficient operation. It is not a one-time process but a iterative cycle of design, prototyping, testing, and refinement, where each stage is guided by empirical data and scientific principles. For instance, a battery designed for a medical implant must prioritize long-term reliability (often 10+ years of continuous operation) and biocompatibility, while a battery for an electric vehicle requires high energy density to extend driving range, rapid charging capability, and robust thermal stability to withstand dynamic operating conditions.

Electrochemical Component Design: The Core of Battery Performance

Electrochemical components—anodes, cathodes, electrolytes, and separators—define a battery's energy density, voltage, cycle life, and safety. Anodes and cathodes enable energy storage and release through lithium-ion intercalation and migration during charge and discharge. Effective electrode design relies on high-capacity active materials, optimized microstructures, and stable composite formulations for efficient electron conduction.

Graphite is widely used as an anode for its stability and low cost, but has limited capacity. Silicon-based materials offer much higher capacity but suffer from severe volume expansion; nanostructuring and carbon coating help relieve mechanical stress and extend cycle life. For cathodes, lithium cobalt oxide (LCO) delivers high energy density for portable electronics, while lithium iron phosphate (LFP) provides exceptional safety and long cycle life for EVs and stationary storage, despite lower energy density.

Electrolytes act as ion transport media. Liquid electrolytes offer high conductivity but present flammability risks. Gel electrolytes improve safety with moderate conductivity. Solid-state electrolytes enable non-flammable, leak-proof designs and higher energy potential, though ionic conductivity remains a challenge. Separators, commonly made from PE, PP, or ceramic-coated materials, physically isolate electrodes while enabling ion flow, with porosity and thickness balanced for conductivity and mechanical stability.

Battery Thermal Management Design: Ensuring Operational Stability and Safety

Thermal management is essential to safe, long-lasting battery performance. Heat generated during cycling can accelerate degradation and trigger thermal runaway at high temperatures, while low temperatures reduce ion mobility and encourage dendrite growth. Effective design maintains cell temperatures within a stable operating window and ensures uniform thermal distribution.

Air cooling is simple and low-cost, ideal for low-power electronics and small systems, but lacks efficiency for high-power applications. Liquid cooling delivers far stronger heat dissipation and is widely used in electric vehicles and high-demand systems, stabilizing temperatures during fast charging and extending cycle life. Phase change materials (PCMs) passively absorb and release heat during phase transitions, reducing temperature spikes. Heat pipe systems provide extremely high thermal transfer rates for premium and aerospace applications, often used alongside other cooling strategies.

Battery Management System (BMS) Design: Optimizing Control and Safety

The BMS serves as the intelligent control unit of a battery pack, continuously monitoring, regulating, and protecting the system through integrated hardware and software. It performs four core functions: real-time state monitoring, accurate state estimation, multi-level safety protection, and energy optimization.

State monitoring tracks cell voltage, pack current, temperature, and insulation resistance to detect anomalies and hazards. Precise sensors prevent overcharge, over-discharge, overheating, and electrical risks. State estimation calculates State of Charge (SOC), State of Health (SOH), and State of Power (SOP) to support reliable operation, longevity, and user experience.

Safety protection acts at cell, module, and pack levels to cut off charging or discharging when thresholds are breached, and logs faults for diagnostics. Energy optimization includes passive or active cell balancing, adaptive charging strategies, and regenerative braking support to improve efficiency, consistency, and service life.

Our Services

Eata Battery offers comprehensive custom battery design services tailored to address the unique energy storage needs of diverse applications, from consumer electronics and industrial equipment to aerospace and medical devices. Our services encompass the entire battery design lifecycle, from initial requirement analysis and material selection to prototyping, testing, and manufacturing support, ensuring that each custom solution meets the highest standards of performance, safety, and reliability. We leverage advanced scientific principles and cutting-edge engineering techniques to create batteries that are optimized for specific form factors, performance parameters, and environmental conditions, filling the gaps left by standardized off-the-shelf batteries.

Our custom battery design approach is collaborative, starting with a deep understanding of the customer's application requirements—including energy density, cycle life, voltage, current, form factor, operating temperature, and safety standards. We then translate these requirements into a detailed design plan, integrating electrochemical, thermal, and mechanical engineering to create a solution that balances performance and cost. Every custom design undergoes rigorous testing to validate compliance with the specified requirements, with iterative refinement to address any performance gaps. Whether the customer requires a single custom cell, a complete battery pack, or an integrated battery management system, Eata Battery provides end-to-end design support to bring their vision to life.

Types of Custom Battery Design Services

Custom Cell Design Services

Eata Battery provides custom cell design services to create individual battery cells optimized for specific physical, chemical, and performance requirements. We design cells in all form factors—cylindrical, prismatic, and pouch—and tailor their electrochemical composition and structural design to meet the customer's unique needs. Physical customization includes designing cell size, shape, and thickness to fit tight form factor constraints, such as ultra-thin cells (≤1 mm thickness) for wearable devices or curved cells for ergonomic medical equipment. We also customize cell casings (metal, plastic, or flexible film) and tab design (number, position, thickness) to ensure compatibility with the customer's assembly process and electrical connection requirements.

Chemical customization involves selecting and optimizing electrode, electrolyte, and separator materials to enhance specific performance parameters. For applications requiring long cycle life (e.g., medical implants), we select high-stability electrode materials such as LFP and add electrolyte additives to reduce side reactions and extend lifespan. For high-power applications (e.g., power tools), we design cells with high-conductivity electrolytes and optimized electrode structures to reduce internal resistance, enabling discharge rates of 10C or higher. For low-temperature applications (e.g., polar equipment), we use low-freezing-point electrolytes and modified electrode materials to maintain ionic conductivity at temperatures as low as -40°C. Performance customization focuses on optimizing energy density, cycle life, safety, and charge-discharge rate, with options for ultra-high energy density cells (>400 Wh/kg) for aerospace applications or high-safety cells (impact, extrusion, and puncture resistant).

Custom Battery Pack Design Services

Eata Battery offers custom battery pack design services to assemble individual cells into functional packs optimized for system-level requirements. We design packs for all power ranges, from small portable packs for consumer electronics to large-scale packs for electric vehicles and energy storage systems. Our pack design process includes cell selection and series-parallel configuration (e.g., 10S5P, 20S8P) to meet the customer's voltage and capacity requirements, with cell arrangement optimized for maximum space utilization and uniform temperature distribution. For example, we arrange cylindrical cells in honeycomb patterns to improve space efficiency or prismatic cells in layers to facilitate thermal management.

We provide custom module design for large battery packs, dividing cells into modular units that are easier to assemble, test, and maintain. Module design includes casing design to protect cells, internal connection design to ensure low resistance and high reliability, and cell fixing to prevent movement during operation. We also design custom thermal management systems for battery packs, tailoring solutions to the application's power requirements and environmental conditions—liquid cooling systems for high-power packs, air cooling systems for small portable packs, and integrated heating systems for low-temperature applications. Additionally, we design electrical connection systems (busbars, connectors, wires) to ensure low resistance, high current capacity, and good insulation, as well as custom casings to meet mechanical strength, waterproof (IP67/IP68), and dustproof requirements.

Integrated Custom Battery Solutions

Eata Battery provides integrated custom battery solutions that combine custom cell design, battery pack design, BMS design, and manufacturing support into a single turnkey service. We work closely with customers to conduct comprehensive requirement analysis, translating their application needs into a complete battery solution. Our integrated services include designing custom cells, assembling them into optimized packs, integrating custom BMS, and providing prototyping and testing support to validate performance. We also offer manufacturing optimization to ensure scalability, with quality control measures implemented throughout the production process to maintain consistency and reliability.

If you are interested in our services, please contact us for more information.