WATER HEAT SINK

For e-mobility

Friction Stir Welded Water heat sinks for e-mobility

A water heat sink for e-mobility is an electronic device, which is made of aluminium casted parts and used for automotive applications (electronic housing). Aluminium casted heat sinks are mainly welded by Friction Stir Welding.

Why choose FSW for the assembly of your die-cast heat sink?

Low cost: replacement of screwing & sealing (cost reduction up to 3)

Perfectly waterproof: 15 years of leak-free guarantee

Higher resistance: the mechanical strength is twice higher than with screwing method

Adopt our FSW head for CNC from 1900€ per month.

The head is compatible with all CNC, mounting / dismounting in 10 min, no change of your CNC.

Where FSW is used in automobile industry?

Friction Stir Welding is used in different parts of automotive application. There are 3 types of components :

Water cooling plate : this part is in aluminium casting and allows the cooling of the batteries of electric vehicles thanks to a cooling channel encloses thanks to a cover welded by FSW.
Drive motor housing : it is an aluminium casting part – the water channel is situated around the motor to cool down an electrical motor. The housing is made by casting, and the cover of the water channel is welded by Friction Stir Welding technology.
Electric control system : this part is composed with an aluminium box, made by casting. The electronic card is inside this housung, and it has to be cooled down.T hat is the reason why the box is made with aluminium, as the thermal conductivity is very high. We will perform the water channel inside this housing to cool down the box. And the cover of the water channel is welded by Friction Stir Welding.

FSW Welding of the active heat sink

An active heat sink is an aluminium component in which a fluid circulates in order to cool electronic components. It is an indispensable element of e-mobility.

Carrying out the welding of this part through FSW offers many advantages:

Heat sink parts before FSW.

– Cost reduced by 2

– Cycle time divided by 5

– Complete automatization

– Casting and FSW in the same place

– Action performed in one operation rather than 2 (sealing and screwing)

– 100% leak proof

– Higher repeatability

Internal part of a water heat sink for E-mobility.

Outside part of a water heat sink for E-mobility. Final part after FSW.

For more technical and strategic information about FSW of heats sinks for electrical vehicles: click here.

Water heat sink cost

Water heat sink market is emerging. The solution of assembling the hood to the heat sink by sealing & screwing is no longer relevant. New technologies have emerged, like friction stir welding, which has revolutionised aluminium welding.

See our price difference* between classical sealing & screwing method and FSW Stirweld solution

*cost per part for 70 000 parts/year

In comparing sealing & screwing method and the Stirweld solution with the FSW head, which adapts to your existing machine, two main factors play a role on the price: Cost of consumables & Quality cost.

Cost of consumables:
Sealing/screwing: € 2 per part
Stirweld solution: € 0.24 per part.

Quality Cost:
Time consuming quality control for sealing/screwing,
Higher defect rates with sealing/screwing.

The screwing & sealing solution is 4 times more expensive than the Stirweld solution.

As OEM batches are usually 2 to 3 times smaller than what was announced for the first five years, so it is better to invest in modular equipment in order to optimize your machine time and costs.

Moreover, the Stirweld solution offers you the same technical quality, at lower cost and with the possibility to modulate its machine park. Characteristics that a special machine does not have.

FSW is the key to reduce heat sink cost and to improve the quality and reliability.

If you whish to learn more about water heat sinks FSW Stirweld solution, you can attend our free webinar.