Skip to main content

GLOBAL

close

Daikin Mobility Lab.

Urgent issue of thermal management in autonomous driving

Shinka

What do you think about the issue relating to thermal management in autonomous driving?

Suganuma

Because full autonomous driving requires loading the car with operation devices that perform a tremendous amount of calculations, I think that the problem of thermal radiation is an urgent issue. With sizeable thermal load accompanying the NVIDIA chip, the computer may shut down when the heat is not thoroughly dissipated during learning by AI-related technology for deep learning or determining calculations. There is heat even for sensors when lasers are used, and the thermal problem arises from a variety of sources.

Shinka

What quantity of electricity is needed for autonomous driving?

Suganuma

Only one CPU is equipped in the car we use for autonomous driving but even the electricity for that is 400-500W. When including sensors, it becomes a considerable amount of electricity.

arithmetic logic unit equipped in the autonomous car

arithmetic logic unit equipped in the autonomous car

Shinka

Currently, we are also working on thermal management materials such as for heat dissipation, thermal insulation, and insulation. Fluorochemicals has a low dielectric constant and the amount of electrical loss is small. This special property is utilized in electrical wire, antenna material, mobile phone base stations, and printed circuit boards. Furthermore, simulations and analysis capacity related to the heat distinctive to air conditioners are made core technologies. I think it would be good to make proposals to autonomous driving car manufacturers and parts manufacturers by expertly incorporating these things with chemical materials.

Suganuma

I am surprised to hear that because I didn’t know that specialty air conditioning manufacturers have yet to take up the area of heat radiation. This would suggest that the knowledge of chemical manufacturers is not greatly reflected in cars at this current stage.

Shinka

You’re absolutely right. Because 10-20 years of durability is sought for cars, fluorochemicals are used for parts needing reliability like seal parts for around the internal combustion engine and fuel tubes surrounding fuel system. Heat is generated even in autonomous driving, and we would like to utilize chemical material technology in areas requiring durability and reliability. Personally, I am proud of the top-level results we’ve had in the world for important safety-related parts near the internal combustion engine.

Suganuma

When speaking of autonomous driving, each sensor is an important safety-related part.

Scene of talk 3
Shinka

Quality control that includes manufacturing stable quality is also our strength. Fluorochemicals are greatly used also in lithium ion batteries. The electrolyte in the electrolyte solution are also fluorochemicals. Fluorochemicals are also used for the gaskets that prevent leaks, and the cathode material, the so-called binder. Also, an investigation is being performed that is looking to use heat resistant materials in the power semiconductors, which are like film condensers, and we are putting energy into development. An investigation is being performed for using fluorine materials in the actuator.

Suganuma

Fluorochemicals are used in areas in which durability and reliability are required.

Shinka

Panasonic, for example, has applied technology cultivated in its home appliances to parts for automotive. I would like to utilize the technologies Daikin has cultivated in its air conditioning equipment and the strengths of the Chemicals Division and apply them in the future to cars.

Providing solutions while shaping the future of autonomous driving cars

Scene of talk 4
Suganuma

European manufacturers are promoting autonomous driving cars in big, fun ways like sitting in the car for interviews, reading the newspaper, or using a tablet during autonomous driving.

But there is something that baffles me. For Shinkansen (bullet trains), there have been exhaustive efforts made to prevent intoxication while riding the train. Why hasn’t there been a discussion about intoxication concerning autonomous driving? I think it is incredibly important for trials to be done to prevent intoxication. Getting intoxicated was a situation we often saw when performing actual tests for autonomous driving. I wonder if it is possible to prevent intoxication by air conditioning.

Shinka

Research is being done concerning air conditioning by various organizations ranging from preventing intoxication to delaying dementia. I would like to see development of air conditioners being optimized while measuring stress or deterring illness from occurring by improving comfort. I also agree that technological development is necessary to prevent intoxicated drivers from inside an autonomous driving car.

Suganuma

There seems to be many important areas in which air conditioning can contribute to autonomous driving.

Shinka

I agree. By the way, when can we expect to see Level 5 autonomous driving vehicles?

Suganuma

Currently only Level 3 vehicles exist. In the future, I think that a bipolarization of Level 2 which the current ADAS becomes the ultra-advanced edition, and Level 4 & Level 5 could be called full automation driving. The former is an ordinary car that the general public can acquire because the costs are suppressed. Without this, it would be difficult to sell the automobile as a mass product. In the case of public transportation for Level 4 and Level 5, such as buses or taxis in which route information can be input in advance, the service can start quickly and reap the benefits because the operating management companies can operate by confirming problems in sensors prior to start of operation.

Scene of talk 5
Suganuma

To the question of when society will see general users owning autonomous driving cars, I am afraid that it will take some time. There are cars that can test the image of a self-driving by continually improving the level of driving support. Most of the autonomous driving cars that manufacturers are currently developing are driven only on the highway.

When speaking only of service, I think various investigations can be done. Because there can be no motivation to develop without a dream, I would like to move quickly. When service can be created, it will be possible to separate whether full automation driving is better or operation assistance is better. I think a good method is to examine from the service side.

Shinka

I think it is greatly rewarding to watch as society changes and know that our technology is playing a role in shaping the future. Because Daikin has a variety of solutions available to meet customer needs, I would like to see us contribute in the field of autonomous driving now while making proposals that anticipate the next 5 to 10 years.

対談の様子4
← Previous Page
1
2
Contact Us
Go To Page Top