Cooling Plate Machining Case Study

Battery thermal management is one of the most critical technologies in modern electric vehicles. As battery energy density continues to increase, maintaining a stable operating temperature has become essential for safety, charging performance, cycle life, and driving range.

The cooling plate is the core component of the battery cooling system. It is installed beneath or between battery modules and circulates coolant through internal channels to dissipate heat efficiently.

Unlike ordinary aluminum plates, EV cooling plates contain intricate internal flow channels, multiple sealing surfaces, and dozens of inlet and outlet interfaces. These features require extremely high dimensional accuracy and surface quality.

Although extrusion and welding technologies can create the basic structure, CNC machining is essential for producing sealing faces, fluid ports, module interfaces, and precision locating features.

The customer is a supplier of battery thermal management systems for electric passenger vehicles.

Their cooling plate products are used in:

The customer's original manufacturing process faced several issues:

HYR CNC proposed a dedicated aluminum machining solution to improve surface quality, sealing performance, and machining efficiency.

Battery cooling systems are evolving rapidly.

Early electric vehicles relied primarily on:

However, as battery capacity increased, these methods became insufficient.

Today, liquid cooling systems dominate the market because they provide:

As a result, cooling plates have become increasingly complex.

Modern cooling plates often integrate:

The increasing complexity directly increases the demand for high-precision CNC machining.

3003 is commonly used in brazed cooling plates.

Advantages:

Applications:

6061 provides:

Applications:

6063 is widely used in extrusion cooling plates.

Advantages:

Applications:

The manufacturing process of EV cooling plates typically includes:

Among all these processes, CNC machining determines the sealing performance and assembly accuracy.

The cooling plate is not simply a heat exchanger.

It is also:

Its critical features require precision machining.

Cooling plates operate under coolant pressure.

The sealing faces require:

If the sealing surface is uneven:

Cooling plates contain:

These features require:

Small errors may cause:

The internal channels must maintain:

CNC machining ensures these requirements are met consistently.

Cooling plates are usually:

Typical wall thickness:

During machining:

Controlling deformation is extremely challenging.

The coolant sealing surfaces require:

Poor surface finish causes:

Achieving stable surface quality requires:

One of the most important requirements is:

Zero leakage.

Any machining defect may lead to:

Therefore:

must all be tightly controlled.

HYR recommended the VMC850 Vertical Machining Center.

The spindle speed reaches:

Advantages:

Suitable for:

The machine adopts:

Benefits:

24-tool ATC.

Supports:

Improving efficiency and reducing setup time.

Benefits:

Especially suitable for:

Machine:

Remove excess material.

Release residual stress.

Reduce deformation.

Machine:

Leave finishing allowance.

Machine:

Achieve final accuracy.

Operations:

Remove:

Improve assembly safety.

Test:

Ensure zero leakage.

Typical cutting parameters:

Each cooling plate undergoes strict inspection.

Requirement:

Inspect:

Requirement:

Ensures:

Requirement:

Inspect:

Cooling plates are tested under coolant pressure.

Inspect:

Guaranteeing safe operation.

After adopting HYR CNC machining solutions:

The customer achieved:

Recommended for:

Suitable for:

Ideal for:

What Is CNC Milling?

Common materials include aluminum 3003, 6061 and 6063 due to their excellent thermal conductivity and corrosion resistance.

CNC machining ensures sealing surface flatness, hole position accuracy and leak-free fluid interfaces.

Most cooling plates require Ra0.8 or better on sealing surfaces.

Typical flatness requirements are 0.03 mm or better.

High-speed machining centers such as the HYR VMC850 are ideal for aluminum cooling plate manufacturing.

As electric vehicles demand higher battery performance and improved thermal management, cooling plates are becoming increasingly sophisticated and precise.

From internal flow channels to sealing surfaces and fluid interfaces, every critical feature depends on high-quality CNC machining.

With excellent aluminum machining capability, high spindle speed, and stable accuracy, HYR CNC machining centers provide reliable and efficient solutions for EV cooling plate manufacturing.

HYR CNC continues to support global battery manufacturers with advanced machining technology and customized production solutions.