General Presentation MicroCool® MAY 2016 Matt Reeves

Wolverine has 100+ years history with decades long customer partnerships.

In 1935, Wolverine invented the first high performance heat transfer tubes and

revolutionized the HVAC commercial chiller industry.

Wolverine is the premier heat transfer design partner for OEM’s like Carrier, Trane, Parker,

York.

Global core markets served: HVAC, Refrigeration & Appliance, Water Heater/Boiler,

Process & Chemical, Electronics Cooling.

MicroCool a Division of Wolverine Tube Inc.

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MicroCool Division

MAY 2016

Wolverine® MDT Enhanced Tube MicroCool®

MDT Enhanced Flat Plate

The MicroCool® division has leveraged Wolverine’s MDT tube surface enhancement technologies and transferred the

technology to flat plates.

This technology is used to create baseplates for power electronics, liquid cooled coldplates, two phase evaporators,

micro-channel surfaces and much more.

In 2013 Microcool launched a catalog line of standard liquid cooled coldplates specifically for the cooling of power

electronics, as well as a free on-line coldplate simulator.

Today MicroCool continues to innovate and now has the best performing mass produced coldplates on the market.

Through smart design and complementary core technologies MicroCool coldplates are also the most cost effective.

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MicroCool Locations

• Decatur AL: Headquarters, R&D, Pilot and Low Volume Production

• Bend OR: Engineering and Sales

• San Diego CA: Engineering and Sales

• Shanghai CN: Manufacturing

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MicroCool Global Customer Partnerships

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MicroCool Core Technologies: Micro Deformation Technology (MDT)

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Micro Deformation works like a plow in a field: Our patented

tooling moves through ductile materials (typically aluminum

or copper) to create fins and pin fins without wasting material

or scrap.

Fin pattern range:

• Density: 10-100 fins per inch.

• Fin thickness: fin thickness = gap

• Fin Height: 0.5-6mm

Pin pattern range:

• Density: 10-25 fins per inch

• Pin thickness: 1.2 - 0.5mm dia and min gap

• Pin Height: 1-8mm

• Pin pattern is “in line” and not staggered

In line pin fin 12fpi

In line pin fin 20fpi (XP)

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MicroCool Core Technologies: Friction Stir Welding (FSW)

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Friction Stir Welding (FSW) is a solid state joining process, meaning frictional heat is generated

between the wear-resistant welding tool, and the material of the work pieces. Joining the work pieces

together while staying below the melting point. This creates a leak proof seal that is stronger and

more reliable than any other cold plate joining method.

MicroCool® has become the expert in friction stir welding high conductivity 1100 series aluminum

MDT™ pin plates into all types of machined, extruded and cast aluminum alloys.

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MicroCool Markets

4/14/16

Solar Inverter Traction Drives Data Center

Wind Inverter Waste Heat Recovery Electric Vehicle MRI amplifier

CPU Cooling

MicroCool Products

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Standard IGBT Coldplates Custom Coldplates

Thermosyphons 2 Phase Evaporators MDT Fin/Pin Plates

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Standard Coldplates: 3000 Series Overview

CFD balanced parallel cooling

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The 3000 series coldplates are designed to fit the 10 most common IGBT form factors and layouts on the market today. They can however be easily customized to fit your need. By combining Extruded ‘tubs’, MDT pin fin inside and FSW construction, we can achieve the highest performing, and most cost effective coldplate available today.

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Standard Coldplates: 3000 Series Models & Pricing

MDT™ In Line Pin Fin Options:

4mm tall standard in line pin fin (1mm dia/gap)

4mm tall extra performance (XP) in line pin fin

(0.5 dia/gap)

Fitting Options: 3/8 NPT G3/8 (BSPP) SAE-6

Electroless Nickel Plating inside and out for fluid

compatibility

Coldplate length options: Extrusions can be cut to

any length, to accommodate multiple IGBT modules.

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*Call for volume pricing

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MicroCool™ Coldplate Advantage

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• Robust leak free friction stir weld design.

• Available electroless nickel plating inside and out to protect against corrosion

with certain coolants.

• Easily customize your design simply by changing the density of the MDT™

fin or pin fin geometry inside without changing the entire design.

• Fast delivery: Next day shipping on stocked 2000 and 3000 series standard

coldplates. 4-6 weeks to deliver custom coldplates.

• The best performing coldplate on the market as well as the most cost

competitive.

• CFD designed balanced parallel cooling with less pressure drop than most

competitors.

Custom Coldplates

Double Sided

Cast

Large Assemblies

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Custom Extrusions

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Coldplate

Typical Cooling Integrated Baseplate

(Infineon HybridPACK 2) MicroCool CAP®

• Requires customer to purchase a

heatsink or coldplate

• Requires use of TIM material

• Requires customer to design a ‘tub’

• Requires use of an O-ring.

• Potential for corrosion of copper

baseplate is combined with an

aluminum tub.

• No TIM

IGBT Module Cooling Methods Compared

• No need for customer to design or purchase

cooling

• No O-ring, no TIM, no tub.

• Single metal design has no corrosion

potential (all aluminum FSW with Copper

clad fin plates)

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TIM O-ring

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MAY 2016

MicroCool CAP™ (direct liquid cooled IGBT baseplate) *patent pending

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MAY 2016

Two methods for construction:

1. The IGBT module can be built/soldered on the Clad fin

plate then welded in after. (we need at least 10mm of

aluminum surrounding the copper pad so we do not

damage the power electronics during the FSW process

2. The IGBT module can be build/soldered to the sealed

and welded coldplate by simply soldering to the copper

pads. The welded boxed coldplate structure is extremely

stiff an resists bending leading to less stress on the DBC

and power electronics.

MicroCool CAP™ (direct liquid cooled IGBT baseplate) cont.

*patent pending

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MicroCool Baseplates and Clad baseplates

MicroCool®-CLAD™ integrated base plate with clad metal

Aluminum fins with copper backing

creates a high power copper IGBT module

that can be cooled in an automotive style

aluminum die cast manifold/tub.

No need for Ni plating

No chance for galvanic corrosion in

aluminum water channel

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2 Phase Evaporators and Thermosyphons

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MicroCool’s dense MDT microchannel fins and

pins are perfect for 2 phase evaporator

designs of all types:

• Pumped refrigerant systems

• Compressor based systems

• Active and passive thermosyphons

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Thermosyphon Overview

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Wolverine’s MicroCool division brings

decades of experience both engineering

and manufacturing enhanced boiling

surfaces. MicroCool’s MDT™

technology fills the unique application of

both pool boiling or flow boiling.

Thermosyphon Example

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Able to cool a 100W processor

case to 70C with an air Inlet temp

of 20C with only a 10 CFM (1.5

m/s velocity) flow.

MicroCool Tool™ www.microcooltool.com

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Visit www.microcooltool.com to simulate your coldplate today.

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Coldplate Comparison

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Common aluminum

with pressed in

copper tube:

MicroCool FSW

Coldplate with MDT

inside.

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Coldplate Comparison: Testing Equipment

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Coolant 50/50 WEG

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Coldplate Comparison: Temperature Measurement location

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The goal was to measure the

maximum coldplate surface

temperature

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Coldplate Comparison: Mock IGBT Heater Blocks

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Results

New Block F/P

Flow Rate PD CP3001 PD CP-Copper Pipe

CP3001 VS CP-Copper Pipe

3 0.023 0.089 6 0.051 0.34 9 0.076 0.74

12 0.14 1.3

15 0.21 1.46

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

3 6 9 12 15

Pre

ssu

re D

rop

(b

ar)

Flow Rate (L/min)

Pressure Drop

CP3001 - New block CP-CopperPipe

New Block F/T

Flow Rate TR(℃/W) CP3001 TR(℃/W) CP-CopperPipe

CP3001 VS CP-Copper Pipe

3 0.04 0.058

6 0.027 0.038

9 0.021 0.03

12 0.018 0.025

15 0.017 0.024

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

3 6 9 12 15The

rmal

Re

sist

ance

(℃

/W)

Flow Rate (L/min)

Thermal Resistance

CP3001 - New block CP-CopperPipe

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Coldplate Comparison: MicroCool VS Copper Tube Coldplate

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3X

4.4X

5.7X

5.9X 4.7X

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

3 6 9 12 15

Flow Rate (l/min)

Pressure Drop (Bar)

MicroCool Copper Tube

33%

34% 30% 24% 29%

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

3 6 9 12 15

Flow Rate (l/min)

Thermal Resistance (C/W)

MicroCool Copper Tube

• 30% less thermal resistance

• 5X less pressure drop

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Coldplate Comparison: Cost

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MicroCool Coldplate • Single piece price $255

• 1000 unit price: ~$100

Copper Tube Coldplate • Single piece price: $323

• 1000 unit price: highly variable

depending on quality and

construction method ~$68-$150

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Thank You

MAY 2016

Robust FSW Construction MDT® Inside Balanced parallel cooling

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