Not every custom battery pack requires an active cooling system.

However, thermal management should be considered whenever a lithium-ion battery operates under conditions that can generate significant heat, such as high current, high C-rate, long duty cycles, high ambient temperatures, or demanding charging conditions.

For OEM and ODM projects, thermal performance is not determined by battery capacity alone. Cell selection, current requirements, operating conditions, BMS protection, mechanical design, and the application’s duty cycle all influence how a custom battery pack behaves during operation.

This guide explains when thermal management should be considered, how BMS temperature monitoring contributes to battery safety, and what OEMs should evaluate when developing a custom lithium battery pack.

What Is Battery Thermal Management?

Battery thermal management refers to the methods used to monitor and control the temperature of a battery during charging, discharging, and operation.

For lithium-ion batteries, temperature can affect:

• Battery performance
• Charging and discharging behavior
• Cycle life
• Safety
• Overall system reliability

Heat is generated during battery operation. One important source of heat is the electrical resistance inside the cells and battery pack.

A simplified relationship is:

P = I²R

Where:

• P = heat generated
• I= current
• R = electrical resistance

As current increases, resistive heat generation can increase significantly.

This is why a battery pack designed for a high-power industrial application may have very different thermal requirements from a battery used in a low-power IoT device.

What Factors Affect the Thermal Performance of a Custom Battery Pack?

There is no single capacity or current value that determines whether a battery pack needs thermal management.

OEM engineers should evaluate several factors together.

Discharge Current and C-Rate

The amount of current a battery delivers has a direct impact on heat generation.

C-rate describes the charge or discharge current relative to the battery’s capacity.

For example, a battery operating at a relatively low C-rate may experience different thermal conditions from a battery of the same capacity operating at a much higher C-rate.

Therefore, when developing a custom battery pack, engineers need to consider both:

• Battery capacity
• Required operating current

Capacity alone does not define the thermal requirements.

Continuous and Peak Current

Peak current and continuous current should be evaluated separately.

A battery may experience a short-duration peak load when a motor starts, accelerates, or encounters increased resistance.

In contrast, continuous high-current operation can result in sustained heat generation.

For OEM battery development, it is useful to define:

• Continuous discharge current
• Peak discharge current
• Peak duration
• Load frequency
• Duty cycle

These parameters provide a clearer picture of the actual operating conditions.

Duty Cycle

A battery used for a few minutes may have different thermal behavior from one operating continuously for several hours.

Repeated charge and discharge cycles can also contribute to heat accumulation.

For this reason, battery testing should reflect the actual operating pattern of the final product whenever possible.

Ambient Temperature

The surrounding environment also matters.

A battery operating in a controlled indoor environment may have different thermal requirements from one installed in industrial equipment exposed to elevated ambient temperatures.

OEMs should define the expected operating temperature range during the battery design stage.

Charging Conditions

Thermal evaluation should include charging as well as discharging.

Charging current, charging speed, and charging conditions can influence battery temperature.

If a product requires relatively fast charging, the charging profile should therefore be included in the battery requirements provided to the battery manufacturer.

Battery Pack Design and Enclosure

The physical design of the battery pack also affects thermal behavior.

Factors can include:

1. Cell arrangement
2. Internal component layout
3. Available space
4. Enclosure design
5. Heat dissipation paths
6. Sealed or enclosed structures

A battery pack installed inside a compact product enclosure may have fewer opportunities for heat dissipation than a battery operating in a more open environment.

Does Every Lithium Battery Need Active Cooling?

No.

Thermal management does not necessarily mean installing a fan, liquid cooling system, or another active cooling solution.

For many custom battery packs, thermal requirements can first be addressed through appropriate battery engineering.

This can include:

• Selecting suitable cells
• Selecting an appropriate battery configuration
• Optimizing pack layout
• Considering the operating current
• Monitoring battery temperature
• Implementing BMS protection
• Testing the battery under representative operating conditions

The goal is not to add the most complicated cooling system possible.

The goal is to develop a battery pack that can operate reliably under its intended conditions.

For this reason, thermal management should be treated as part of battery pack design, rather than as a separate feature added after the battery has been developed.

When Does a Custom Battery Pack Need More Thermal Evaluation?

Some operating conditions require closer thermal consideration.

This does not mean that every application in the higher-risk categories automatically requires active cooling.

Instead, these conditions indicate that thermal performance should receive more attention during battery development and validation.

Thermal Management for Different Applications

Industrial Equipment

Industrial equipment can place demanding requirements on a custom battery pack.

Depending on the application, batteries may experience:

• High continuous current
• Repeated peak loads
• Long operating periods
• Variable ambient temperatures
• Compact installation spaces

For these applications, thermal requirements should be considered together with electrical, mechanical, and BMS requirements.

The battery should be designed around the actual operating profile of the equipment.

Medical Devices

Medical devices can require a combination of:

• Reliable power
• Compact battery dimensions
• Stable operating performance
• Appropriate protection functions
• Long operating periods

A battery installed inside a medical device may have limited space and limited heat dissipation.

Therefore, battery thermal behavior should be considered alongside the product’s enclosure, operating current, charging requirements, and mechanical constraints.

For medical battery projects, thermal considerations are part of the broader battery reliability and safety design process.

IoT Devices

Many IoT devices have relatively low power requirements.

However, some IoT products operate continuously, use compact enclosures, or are installed in outdoor environments where temperature conditions can vary significantly.

For these applications, thermal management may focus less on active cooling and more on:

• Appropriate cell selection
• Battery configuration
• Temperature monitoring
• BMS protection
• Compact pack design
• Operating temperature requirements

The thermal requirements should therefore be evaluated according to the actual IoT application rather than assuming that all IoT batteries have low thermal demands.

How Does a BMS Help With Battery Temperature?

The Battery Management System (BMS) is an important part of battery protection.

A BMS can monitor battery operating conditions and provide protection when predefined limits are exceeded.

For temperature protection, temperature sensors can monitor battery temperature.

If a high-temperature condition is detected, the BMS can trigger high-temperature protection according to the battery’s configured protection parameters.

A simplified protection process can be represented as:

Temperature Sensor → Temperature Monitoring → High Temperature Detected → High-Temperature Protection

This provides an additional layer of protection during abnormal operating conditions.

However, BMS protection should not be considered a replacement for proper battery design.

The BMS can respond to a temperature condition, but the battery pack should still be designed according to the application’s electrical, mechanical, and environmental requirements.

How Should OEMs Approach Thermal Management During Battery Development?

Thermal considerations should be introduced early in the development process.

A typical custom battery development process can include:

Define Application Requirements

Start with the actual product requirements:

• Voltage
• Capacity
• Continuous current
• Peak current
• Charging current
• Operating time
• Duty cycle
• Operating temperature
• Available installation space

Select Appropriate Cells

Cell selection should consider more than capacity and energy density.

Depending on the application, engineers may also evaluate:

• Power requirements
• Discharge capability
• Internal resistance
• Cycle life
• Operating conditions

The selected cell should match the actual requirements of the product.

Develop the Battery Pack

The battery configuration and physical layout should be developed around the product’s available space and electrical requirements.

Mechanical constraints can also affect how heat behaves inside the battery enclosure.

Integrate BMS Protection

The BMS can be configured according to the battery’s electrical and protection requirements.

Temperature monitoring and high-temperature protection can provide an additional safety layer.

Build and Test a Prototype

Prototype testing allows engineers to evaluate the battery under representative operating conditions.

Temperature behavior should be evaluated together with electrical performance and other project requirements.

Validate Before Mass Production

Before moving into mass production, the battery design should be validated against the requirements of the final application.

This helps identify potential issues before large-scale manufacturing.

How to Test the Thermal Performance of a Custom Battery Pack

Thermal testing should reflect how the battery will actually be used.

Depending on the application, testing may consider:

• Continuous discharge
• Peak discharge
• Charging
• Operating temperature
• Duty cycle
• Product enclosure
• Expected operating duration

Temperature sensors can be used to monitor battery temperature during testing.

For a custom battery project, test conditions should be defined according to the customer’s application rather than relying only on generic laboratory conditions.

This is particularly important for industrial and medical applications where the battery may operate continuously or under demanding load conditions.

Thermal Management Is More Than Cooling

When people hear “battery thermal management,” they often think about cooling systems.

But thermal management starts much earlier than cooling.

The more important question is not : How can we cool this battery?

It is: How should the battery be designed to operate within the required conditions?

That requires consideration of the complete battery system:

Application Requirements
↓
Cell Selection
↓
Electrical Design
↓
BMS Design
↓
Mechanical Design
↓
Temperature Monitoring
↓
Prototype Testing
↓
Validation
↓
Mass Production

The appropriate approach depends on the application.

A low-power IoT device may require relatively simple thermal considerations, while an industrial battery operating under high loads may require significantly more detailed evaluation.

Custom Battery Pack Development for Industrial, Medical and IoT Applications

Hypercell provides custom battery OEM/ODM services for applications including industrial equipment, medical devices, and IoT products.

Custom battery development can involve:

• Cell selection
• Custom voltage and capacity
• Battery pack configuration
• BMS engineering
• Temperature monitoring and protection
• Mechanical design
• Prototype development
• Testing and validation
• Certification support
• Mass production

Our approach is to develop the battery around the requirements of the end product rather than simply selecting an off-the-shelf battery.

For applications with specific current, operating temperature, space, charging, or duty-cycle requirements, these factors can be evaluated during the battery development process.

Frequently Asked Questions

Q: Does every lithium-ion battery need thermal management?

No. Thermal requirements depend on factors such as current, C-rate, duty cycle, ambient temperature, charging conditions, cell characteristics, and battery pack design.

Q: When does a battery pack need active cooling?

Active cooling may be considered when the battery operates under demanding thermal conditions that cannot be adequately managed through appropriate cell selection, pack design, heat dissipation, and other design approaches.

Q: Does a higher-capacity battery generate more heat?

Not necessarily. Heat generation depends on factors including current, internal resistance, operating conditions, and duty cycle—not battery capacity alone.

Q: Can a BMS prevent a battery from overheating?

A BMS can monitor battery temperature and trigger protection when predefined temperature limits are reached. However, BMS protection does not replace appropriate battery pack design and thermal evaluation.

Q: How does C-rate affect battery temperature?

A higher C-rate generally means higher current relative to battery capacity, which can increase heat generation. Actual temperature rise also depends on cell characteristics, internal resistance, operating time, and other design factors.

Q: What information should I provide when requesting a custom battery pack?

OEM customers should provide voltage, capacity, continuous current, peak current, charging requirements, operating temperature, duty cycle, available space, and application requirements. More detailed application information allows engineers to better evaluate the battery design.

Conclusion

Not every custom lithium battery pack needs active cooling.

However, thermal management should be considered whenever the application involves high current, high C-rate, long duty cycles, high ambient temperatures, demanding charging conditions, or limited heat dissipation.

For OEMs, the best approach is to consider thermal requirements from the beginning of battery development.

A custom battery pack is more than Cells + BMS + Enclosure.

Its electrical design, cell selection, BMS protection, mechanical structure, temperature monitoring, testing, and validation all need to work together around the requirements of the final product.

Need a custom battery pack for an industrial, medical, or IoT application? Contact Hypercell to discuss your battery requirements.

In the rapidly evolving landscape of global electrification, energy density and unit cost are no longer the sole criteria for evaluating custom battery manufacturing partners. As international supply chains face geopolitical friction, raw material volatility, and tightening environmental standards, original equipment manufacturers (OEMs) and original design manufacturers (ODMs) face a dual challenge: ensuring uncompromising Battery Safety while maintaining high Supply Chain Resilience.

At Hypercell, we specialize in end-to-end custom battery pack design and precision manufacturing. Serving high-stakes industries—including medical devices, industrial automation, consumer electronics, and smart IoT networks—Hypercell integrates advanced battery safety engineering with robust, traceable supply chain systems to guarantee uninterrupted product performance and brand reliability.

Multi-Layered Battery Safety Architecture: Cell to BMS Integration

Safety is built into the fundamental chemistry, mechanical layout, and electronic controls of every custom Hypercell battery pack. Whether using Lithium Iron Phosphate (LiFePO4) for high thermal stability, high-density Cylindrical cells (18650 / 21700), or flexible Lithium-polymer (LiPo) form factors, our multi-tiered safety protocols mitigate risk across all operating conditions.

• Thermal Isolation & Structural Integrity: Precision spacing between cells prevents single-cell thermal events from propagating across the pack. We utilize UL94-V0 flame-retardant structural frames, thermal pads, and impact-resistant enclosures.
• Smart BMS Safeguards: Our custom Battery Management Systems (BMS) provide real-time monitoring of voltage, current, internal resistance, and temperature. Dual-layer hardware protection ensures backup shut-off in the event of firmware anomalies.
• Scene-Driven Chemistry Matching: Matching cell chemistry (LiFePO4, Cylindrical, LiPo) precisely to the electrical and physical constraints of medical instruments, IoT nodes, or rugged industrial equipment.

Supply Chain Resilience & Manufacturing Traceability

A reliable battery design requires a secure, transparent supply chain. Hypercell leverages state-of-the-art automated production lines and digital tracking infrastructure to insulate B2B clients from market disruptions and quality defects.

End-to-End MES Traceability
Hypercell’s proprietary Manufacturing Execution System (MES) tags every raw cell, BMS board, and connector with a unique barcode during incoming quality control (IQC). Throughout automated spot welding, capacity grading, and final aging tests, real-time parametric data is linked to the individual serial number. This enables complete product genealogy, targeted warranty tracking, and full compliance with global regulations such as the European Union’s Digital Battery Passport.

Comprehensive Testing & Global Certification Readiness

Bringing a custom medical device, IoT sensor, or industrial machine to global markets requires rapid, predictable certification pathways. Hypercell provides in-house validation using specialized testing equipment, including thermal shock chambers, automated cycle testers, vibration tables, high-voltage short-circuit simulators…

Our custom battery solutions are manufactured under strict ISO 9001 quality management systems and are engineered to meet international safety and transport standards.

• UN 38.3 & MSDS: Guaranteed safe air and maritime transport compliance.
• IEC 62133: International safety standard for portable sealed lithium secondary packs in consumer, IoT, and medical applications.
• UL 1973: Safety standards for stationary energy storage and industrial motive battery systems.
• CE, RoHS, REACH: Full environmental and electromagnetic compatibility for European and North American expansion.

Frequently Asked Questions

Q1: What customized battery solutions does Hypercell offer for OEM/ODM clients?

A: Hypercell provides end-to-end custom battery pack development, including custom BMS engineering, mechanical enclosure design, cell selection (LiFePO4, Cylindrical, LiPo), automated prototyping, full-scale manufacturing, and global certification support tailored for medical, industrial, consumer, and IoT applications.

Q2: How does Hypercell’s MES system enhance battery quality and supply chain safety?

A: Our MES tracks each component and production parameter (welding current, capacity test, voltage drift) in real time against a unique serial number. This ensures quality gatekeeping, root-cause traceability, and seamless audit compliance for B2B supply chain security.

Q3: Why choose LiFePO4 vs. Lithium-polymer (LiPo) for custom IoT or medical applications?

A: LiFePO4 is ideal for applications prioritizing ultra-long cycle life (2000+ cycles) and supreme thermal safety, such as medical carts and industrial equipment. Lithium-polymer (LiPo) offers high energy density and ultrathin, flexible form factors ideal for compact consumer electronics and slim IoT sensors. Hypercell engineers assist in selecting the optimal chemistry for your specific device requirements.

UN38.3 refers to Section 38.3 of the United Nations Manual of Tests and Criteria. The standard ensures that lithium-ion and lithium metal batteries can safely withstand thermal, mechanical, and electrical stresses encountered during global transport without:

1. Leaking hazardous materials
2. Rupturing structural enclosures
3. Experiencing thermal runaway or catching fire
4. Disassembling or exploding

Failure to present verified UN38.3 test summary reports can result in immediate shipment rejection by air carriers, ocean freight handlers, customs clearance authorities, and international distribution logistics providers.

Why UN38.3 Matters for OEM Product Success

Integrating high-capacity battery packs without factoring in transportation clearance is a common pitfall in hardware development. A battery system may deliver high energy density and optimal runtime during operation, yet fail mechanical shock or altitude pressure simulations.
To secure global market access, OEM engineering teams must integrate transportation safety requirements directly into early-stage product requirements.

Required UN38.3 Test Sequence

UN38.3 testing requires battery cells and multi-cell packs to undergo a rigid series of environmental, mechanical, and electrical stress evaluations.

Target OEM Application Sectors

UN38.3 compliance is mandatory across all major battery-powered product categories:

• Industrial Equipment & Robotics: Automated Guided Vehicles (AGVs), Autonomous Mobile Robots (AMRs), portable diagnostic equipment.
• Medical Devices: Portable monitoring systems, mobile ventilators, surgical power tools.
• UAV & Commercial Drones: Mapping equipment, inspection drones, defense systems.
• IoT & Smart Infrastructure: Asset tracking devices, remote environmental monitors, smart utility meters.

Common Causes of UN38.3 Failure

1. Subpar Cell Quality: Low-tier cells exhibit high internal resistance variations, leading to thermal instability under stress.
2. Inadequate BMS Design: Weak protective circuitry fails to interrupt current during short-circuit (T5) or overcharge (T7) testing.
3. Weak Mechanical Housing: Insufficient internal structural support leads to broken solder joints, disconnected nickel strips, or cracked outer enclosures during shock (T4) and vibration (T3) tests.
4. Thermal Accumulation: Inadequate cell spacing traps heat, accelerating runaway during high-temperature short-circuit tests.

How Custom Battery Engineering Accelerates Compliance

Partnering with experienced custom battery engineering specialists mitigates certification risks and prevents redesign loops. Custom designs optimize performance through:

• Integrated BMS Architectures: Custom-tuned firmware and hardware protections ensure instantaneous disconnects during overcharge and short-circuit conditions.
• Advanced Thermal Barrier Engineering: Phase-change materials, thermal pads, and directional heat dissipation prevent cell-to-cell thermal propagation.
• Ruggedized Structural Enclosures: Custom-molded housings and isolated cell holders absorb high-G impacts and continuous harmonic vibration.

Compliance Best Practices for OEMs

Do:

• Select tier-1 cell manufacturers with per-certified base chemistry testing.
• Integrate multi-tier BMS hardware protection logic.
• Implement physical thermal barriers between high-energy density cells.
• Work with experienced battery design partners early in the development cycle.
• Maintain complete UN38.3 Test Summary documentation (per UN 38.3.5 requirements).

Avoid:

• Using off-the-shelf, non-validated consumer-grade battery assemblies.
• Postponing compliance design until late prototype stages.
• Omitting structural vibration and shock resistance in internal pack geometry.

Frequently Asked Questions

1.Is UN38.3 certification mandatory globally?
Yes. International transport authorities including IATA, ICAO, IMO, and DOT mandate UN38.3 compliance for shipping lithium batteries by air, sea, rail, or road.

2.Does every custom battery configuration require its own UN38.3 test?
Yes. Any change to cell type, pack architecture, series-parallel configuration, enclosure design, or BMS protection scheme requires a new test sequence or official change evaluation.

3.How long does the UN38.3 certification process take?
Standard testing timelines typically range from 4 to 6 weeks, depending on laboratory availability, pre-test preparation, and battery cycle times for overcharge and thermal stability tests.

Designing a custom battery pack requires balancing voltage, capacity, thermal safety, and cell consistency. Connecting battery cells in series increases overall terminal voltage, while parallel connections increase total amp-hour (Ah) capacity. Combining both in Series/Parallel (e.g., 4S2P) enables custom voltage and energy densities for medical devices, e-bikes, drones.

Fundamentals of Battery Cell Configurations: Series vs. Parallel

When engineering a custom battery pack, raw battery cells (such as 18650, 21700, or prismatic Li-ion cells) must be configured to meet the target system’s electrical requirements.

Nominal Cell Voltages by Battery Chemistry

Selecting the right chemistry is the first step in custom OEM battery manufacturing. Each battery chemistry provides a specific nominal voltage:

• Lithium-ion (NMC/LCO): 3.60V – 3.70V per cell (Standard for consumer electronics & high energy density)
• Lithium Iron Phosphate (LiFePO4): 3.20V per cell (High safety, Typically 2,000–6,000 cycles depending on DoD and operating conditions.)
• Lithium Titanate (LTO): 2.40V per cell (Ultra-fast charging & low-temperature tolerance)
• Lead Acid: 2.00V per cell
• Alkaline: 1.50V per cell
• NiMH / NiCd: 1.20V per cell

Series Configurations for Higher Operating Voltages

Connecting cells in series (1S, 2S, 3S…nS) increases total voltage while keeping capacity (Ah) identical to a single cell.

The Weakest Link Phenomenon in Series Strings

In a series string, system performance is limited by the weakest cell:

• During Discharge: The weak cell drains first, causing premature voltage drop and early device shutdown. Under extreme loads, potentially leading to cell reversal under severe over-discharge conditions.
• During Charge: The low-capacity cell fills up first and enters an over-charge state longer than neighboring cells, generating heat and accelerating degradation.

Source: Battery University

Parallel Configurations for Extended Capacity & Runtime

Connecting cells in parallel (1P, 2P, 3P…nP) boosts output capacity and continuous current delivery while maintaining the nominal cell voltage.

Key Considerations for Parallel Cell Engineering

• Fault Tolerance: An open-circuit cell in parallel reduces capacity but allows system operation (similar to an engine running down one cylinder).
• Internal Short Circuit Risks: A hard short-circuit inside a parallel cell causes adjacent cells to dump energy into the fault.
• Protection Integration: Industrial OEM battery packs integrate individual cell fuses or micro-PTCs to disconnect shorted cells automatically before thermal runaway occurs.

Source: Battery University

Series/Parallel Combinations  & Pack Naming Conventions

Understanding 4S2P Architecture

In custom battery manufacturing, battery configurations are written with the series count first, followed by the parallel count (e.g., 4S2P).

• Structure: 4 cells in series * 2 strings in parallel (8 total cells).
• Electrical Output:
  Nominal Voltage: 3.6V* 4 = 14.4V
  Total Capacity: 2,400mAh * 2 = 4,800mAh
  Total Energy: 14.4V * 4.8 Ah = 69.12Wh

Partner with an Experienced Custom Battery Pack OEM/ODM

Need a tailored power solution for your product?
Contact our sales team today to review your project specifications, select the optimal cell architecture, and build a prototype custom battery pack.

Explore Hypercell’s cylindrical lithium-ion battery production process, advanced manufacturing capabilities, and customized 18650 battery solutions.

How Are 18650 Batteries Manufactured?

18650 lithium-ion batteries are widely used in power tools, consumer electronics, medical devices, industrial equipment, IoT devices, and battery pack applications due to their high energy density, reliability, and mature technology.

The manufacturing process requires precise control throughout electrode production, cell assembly, and quality inspection to ensure battery safety, performance, and consistency.Every manufacturing stage directly affects the battery’s energy density, cycle life, safety performance, and overall reliability

Hypercell provides customized 18650 lithium-ion battery solutions with professional manufacturing capabilities, advanced production equipment, and strict quality management systems.

18650 Battery Manufacturing Process

The production of an 18650 battery mainly includes five stages:

• Raw Material Inspection
• Electrode Manufacturing
• Cylindrical Cell Assembly
• Formation & Performance Testing
• Digital Traceability & Quality Control

Stage 1: Raw Material Inspection & Preparation

Materials including cathode materials, anode materials, separators, electrolyte, and battery shells undergo strict incoming quality inspection before entering production.

Proper material management provides the foundation for stable battery performance and safety.

Stage 2: Electrode Manufacturing

Electrode manufacturing begins with slurry preparation, where active materials, conductive additives, binders, and solvents are mixed into a uniform slurry. The cathode slurry is coated onto aluminum foil, while the anode slurry is coated onto copper foil through the electrode coating process.

The coated electrodes then undergo drying to remove residual solvents, followed by calendaring to achieve the required thickness and electrode density. The electrodes are subsequently processed through slitting to obtain precise widths required for cell assembly.

Before entering the assembly stage, the electrode sheets undergo vacuum baking to remove residual moisture. Strict moisture control ensures better battery safety, improved cycle life, and long-term reliability.

Stage 3: Cylindrical Cell Assembly

The positive electrode, separator, and negative electrode are precisely wound together to form a cylindrical jelly-roll structure. After winding, electrode tabs are welded to ensure reliable current collection. The jelly roll is then inserted into the cylindrical steel case

Next, a groove is mechanically formed near the top of the case during grooving to secure the internal structure, followed by electrolyte injection in a controlled low-humidity environment. After electrolyte injection, the cells undergo electrolyte soaking to ensure complete wetting of electrodes and separators, followed by controlled aging.

Finally, cell sealing is performed to hermetically seal the cell with a cap assembly that integrates a Current Interrupt Device (CID) and a safety vent, allowing the cells to safely proceed to the formation and testing stages.

Stage 4: Formation & Performance Testing

During formation, each cell undergoes controlled charge and discharge cycles to activate the electrochemical system and create a stable SEI layer on the anode surface. This process plays an important role in battery safety, cycle life, and long-term performance.

After formation, cells enter the aging stage under controlled environmental conditions. Aging helps evaluate voltage stability and identify potential defects before final inspection.

Each cell is tested for key parameters including capacity, voltage, internal resistance, and overall electrical performance. Cells are then graded according to performance characteristics to ensure consistency for battery pack assembly.

Stage 5: Digital Manufacturing & Traceability

Each battery cell is scanned and recorded through Hypercell’s MES-based digital production management system.

The traceability system tracks manufacturing information, inspection records, and production data to ensure complete quality control throughout the battery manufacturing process.

Digital traceability enables efficient quality management and supports reliable battery production for global customers.

Hypercell 18650 Battery Manufacturing Capability

As an experienced lithium-ion battery manufacturer, Hypercell provides customized cylindrical battery solutions from cell selection and battery design to mass production and quality validation.

Our capabilities include:

• Cylindrical lithium-ion battery manufacturing
• Custom battery pack development
• Battery design support
• BMS integration
• Production quality control

With advanced manufacturing equipment, strict quality management, and complete production traceability, Hypercell delivers safe, reliable, and high-performance 18650 battery solutions.