Successfully Surviving Overheat, Heat Sinks Helped A LOT!

NorthStar

Member
Joined
Nov 30, 2018
Messages
72
Reaction score
42
Country
United States
Hey guys,

Today I left my car in direct sunlight all morning until 3pm, with 2 heat sinks installed to the cam

As of 11am “HT” overlay started showing on the video. As per Blackvue notes of the latest heat cutoff temp, this means that the surrounding temp reached the 70c/158f point

This means that the cam will auto shut down if the temp goes up only by additional 5c/9f

Outdoor temp was 36c/96f at that point. The outdoor peak temp of that day was 40c/104f

Surprisingly, despite the fact that the heat kept building up inside the car, it didnt shut down until I came back to the car 4 hours later

I am assuming that the 2 heat sinks setup I am using helped a lot to let the cam survive this extreme heat while parking in direct sunlight for 4 hours straight.

Here are couple of pics for the heat sinks, along with the ebay links. Please note that I installed the heat sinks at the bottom of the cam on purpose, not on the top, since hot air always go up by its nature, so I didnt want to block the vents on top

The SD card I am using is the famous Samsung endurance 128gb, incase anyone was wondering

Thoughts?

UPDATE: June 9th: today the outside temperature was 111F/44c, the car was parked all day in direct sunlight and the cam kept working without issues

UPDATE: June 12th: the temp yesterday was 113F/45c, the car was parked all day long in direct sunlight, with closed windows and the cam kept working without issues



 
Last edited:

Omega-TI

Member
Joined
May 6, 2019
Messages
44
Reaction score
12
Country
United States
Dash Cam
BlackVue DR900S-2CH
Excellent post! I'll keep this in mind *IF* I develop any overheating issues this summer.
 

kamkar1

Well-Known Member
Joined
Oct 11, 2013
Messages
22,024
Reaction score
12,281
Country
Denmark
Dash Cam
10 years, many dashcams
There are quite a few heat sinks for 540 Size motors for RC cars.
And don't get desperate and buy one of the heat sinks with a fan on it, at least not unless your car radio go full tilt all the time, otherwise the fan noise will make you insane.
 

Omega-TI

Member
Joined
May 6, 2019
Messages
44
Reaction score
12
Country
United States
Dash Cam
BlackVue DR900S-2CH
There are some cheaper ones on ebay for $3.88 with FREE shipping << HERE >>
Question... how did you attach them? Are they a snug fit or did you need adhesive?

46436
 
OP
NorthStar

NorthStar

Member
Joined
Nov 30, 2018
Messages
72
Reaction score
42
Country
United States
There are some cheaper ones on ebay for $3.88 with FREE shipping FONT]HERE >>
Question... how did you attach them? Are they a snug fit or did you need adhesive?

View attachment 46436


The ones I got are snug fit, cant be any better. I ensured that the ones i get are from a known brand and that the metal they use “works”. Also, i was only looking for the options with long fins. Some are longer than the others if you notice
 

kamkar1

Well-Known Member
Joined
Oct 11, 2013
Messages
22,024
Reaction score
12,281
Country
Denmark
Dash Cam
10 years, many dashcams
If my grey good serve me right a 540 motor are 36 mm in diameter.
The 540 are actually the length of the motor housing / can.



You can even get water cooled "sleeves" for electric motors in RC boats.
There are other sized too, so if 36 mm don't do it for your particular camera, you could try googling for "electric motor heat sink + your diameter"
 
Last edited:

Omega-TI

Member
Joined
May 6, 2019
Messages
44
Reaction score
12
Country
United States
Dash Cam
BlackVue DR900S-2CH
Who knows what might happen, someone reading this thread might get the bright idea of designing and manufacturing one specifically for the BlackVue DR900S that covers it's entire length from end to mounting bracket.

Attaching on the bottom would be the best way to go for me, otherwise it would interfere with my PolarizitTM filter.
 

kamkar1

Well-Known Member
Joined
Oct 11, 2013
Messages
22,024
Reaction score
12,281
Country
Denmark
Dash Cam
10 years, many dashcams
With acess to a lathe and a little ALU you could turn out a fancy smanch custom heatsink, for any diameter cylinder shaped camera.
 

Omega-TI

Member
Joined
May 6, 2019
Messages
44
Reaction score
12
Country
United States
Dash Cam
BlackVue DR900S-2CH
I do have one more question concerning the weight of those heat sinks. Are the heat sinks light enough that they'll add no appreciable strain to the adhesive strip that holds the unit on the windshield? If it's too heavy on a hot day, I'd hate to come out and see the unit hanging by it's wires. Just something that crossed my mind.
 
OP
NorthStar

NorthStar

Member
Joined
Nov 30, 2018
Messages
72
Reaction score
42
Country
United States
I do have one more question concerning the weight of those heat sinks. Are the heat sinks light enough that they'll add no appreciable strain to the adhesive strip that holds the unit on the windshield? If it's too heavy on a hot day, I'd hate to come out and see the unit hanging by it's wires. Just something that crossed my mind.
Good question. Surprisingly, they are super light weight, I added two without worrying about what you mentioned

Keep in mind that I am strictly referring to the ones I bought from “CPV Racing” brand, ebay link in original post. They worked very well in regards to reducing heat as well as being lightweight. I am not sure if other brands will be worse/better
 

Aronis

Member
Joined
Mar 22, 2019
Messages
45
Reaction score
17
Country
United States
Here are couple of pics for the heat sinks, along with the ebay links. Please note that I installed the heat sinks at the bottom of the cam on purpose, not on the top, since hot air always go up by its nature, so I didnt want to block the vents on top

The SD card I am using is the famous Samsung endurance 128gb, incase anyone was wondering
That's Genius! Nice idea.

Mike
 
OP
NorthStar

NorthStar

Member
Joined
Nov 30, 2018
Messages
72
Reaction score
42
Country
United States
UPDATE: today the car was parked in direct sunlight for 4 hours with outside temp of 110f/43c and the cam was working just fine.

I will keep you posted once the temp goes up to higher numbers
 

Nath

Active Member
Joined
Aug 8, 2017
Messages
224
Reaction score
83
Country
Germany
Dash Cam
Blackvue DR900S-2CH
That's pretty interesting, today i've noticed "HT" tag in the video (without notification) and that's only about 18°C ambient temperature (white car, white seats, parked in direct sun).

But I don't know why I should use a heatsink when the Blackvue obviously didn't think it's necessary... :p
 

Omega-TI

Member
Joined
May 6, 2019
Messages
44
Reaction score
12
Country
United States
Dash Cam
BlackVue DR900S-2CH
But I don't know why I should use a heatsink when the Blackvue obviously didn't think it's necessary... :p
Who knows? It could be anything really, I'd guess the 4K sensor put them in a heat range not expected for their design. Once a design is formalized, marketed and has made an impact in the marketplace, it not all that easy to change. First you have customer awareness of the design, but you also have supply chain issues, etc. Adding a heat sink may not be aesthetically pleasing, but if it works. The thing is already expensive enough, further modification might have placed them out of the market.
 
OP
NorthStar

NorthStar

Member
Joined
Nov 30, 2018
Messages
72
Reaction score
42
Country
United States
UPDATE: after 15 days of using the double heat sinks method, while the car being parked in direct sunlight all day long, max outside temperatures of 108-111F (40-44c), the cam never overheated or turned off!

Only downside that I noticed is that the heat sinks created fine scratches on the body of the cam during installation, but who cares! Pic attached

IMG_9492.jpg
 

Nigel

Well-Known Member
Joined
Jul 7, 2014
Messages
9,340
Reaction score
4,945
Location
Devon
Country
United Kingdom
Dash Cam
Gitup F1, A129, B1W, B2W
UPDATE: after 15 days of using the double heat sinks method, while the car being parked in direct sunlight all day long, max outside temperatures of 108-111F (40-44c), the cam never overheated or turned off!

Only downside that I noticed is that the heat sinks created fine scratches on the body of the cam during installation, but who cares! Pic attached

View attachment 46645
Did you not use any heatsink (thermal transfer) compound? It should help significantly to move the heat into the heatsinks...
 
OP
NorthStar

NorthStar

Member
Joined
Nov 30, 2018
Messages
72
Reaction score
42
Country
United States
Did you not use any heatsink (thermal transfer) compound? It should help significantly to move the heat into the heatsinks...
Nope I thought I will start without it and see if it works fine, and it did, so I decided not to put any thermal compound since it is messy
 
OP
NorthStar

NorthStar

Member
Joined
Nov 30, 2018
Messages
72
Reaction score
42
Country
United States
UPDATE 12th of June: yesterday the temp reached 113F/45c and the cam kept working without issues
 

kamkar1

Well-Known Member
Joined
Oct 11, 2013
Messages
22,024
Reaction score
12,281
Country
Denmark
Dash Cam
10 years, many dashcams
Uuuuu thats hot, my old wrinkly ass would be on the beach in the water under a parasol and drinking lots of sodas.
But are we talking regular driving and recording here or parked in the sun and recording ?
 
Top