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Discussion Starter · #1 ·
Hello, i have noticed that the battery temperature has always been above medium, even in the morning when i start the car for the first time, without having charged overnight.
I never use fast chargers.
Is it normal, how are yours?
Speedometer Odometer Tachometer Vehicle Car
 

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Hello, i have noticed that the battery temperature has always been above medium, even in the morning when i start the car for the first time, without having charged overnight.
I never use fast chargers.
Is it normal, how are yours?
View attachment 707
Mine always ran about 3/4 toward hot. The problem I had with battery temp is that in hot weather it would run excessively hot and you don’t get a warning until you turn the car off. At that point you have to manually start the cooler which uses the AC compressor to run the cooler and they want you to plug in to conserve the charge. It got so bad I sold the car. Mazda designed it that way according to tech line.
 

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Discussion Starter · #4 ·
Mine always ran about 3/4 toward hot. The problem I had with battery temp is that in hot weather it would run excessively hot and you don’t get a warning until you turn the car off. At that point you have to manually start the cooler which uses the AC compressor to run the cooler and they want you to plug in to conserve the charge. It got so bad I sold the car. Mazda designed it that way according to tech line.
How can i force this, can you explain?
 

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Gary will probably explain better but basically on excessive battery temperature a warning light comes on. It advises you to stop and manually start the battery cooler. The start cooler option only appears when the battery excessive temp warning comes on. Mazda also advise you to plug in and charge because the heatpump, which cools the battery cooling liquid, draws directly from the hv batteries and there reduces range unless you balance it with an active charge.

It is not a start/stop setting option so you cannot force

Alan
 

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How can i force this, can you explain?
I had a Mazda tech get online with the factory tech line and ask two questions. First why isn’t it automatic and 2nd can I turn it on manually without getting the warning. They said they intentionally programmed it this way because they don’t know how much battery you have left or how far you are from a charger. On the second question is no you can turn it in until the warning comes up and that doesn’t happen until the battery hits 104 degrees. That means you could be driving all day in the heat and not even know it until you shut off the car. Where I live we will have 60 plus days of over 100 degrees during the summer. It got to the point that it happened twice a day every day. I told Mazda it was a bad design and I wanted to return it under the lemon law. I even had a lawyer working on it and Mazda declined because the car was working as designed. The lawyer said to take it any further I would have to sue Mazda. They have more lawyers and money than me so I sold it back to the dealer at a loss. I have had 4 Mazdas but this will be my last
 

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Discussion Starter · #7 ·
I had a Mazda tech get online with the factory tech line and ask two questions. First why isn’t it automatic and 2nd can I turn it on manually without getting the warning. They said they intentionally programmed it this way because they don’t know how much battery you have left or how far you are from a charger. On the second question is no you can turn it in until the warning comes up and that doesn’t happen until the battery hits 104 degrees. That means you could be driving all day in the heat and not even know it until you shut off the car. Where I live we will have 60 plus days of over 100 degrees during the summer. It got to the point that it happened twice a day every day. I told Mazda it was a bad design and I wanted to return it under the lemon law. I even had a lawyer working on it and Mazda declined because the car was working as designed. The lawyer said to take it any further I would have to sue Mazda. They have more lawyers and money than me so I sold it back to the dealer at a loss. I have had 4 Mazdas but this will be my last
I'm sad about what happened to you, now i'm also apprehensive about what the future holds for my car.
Thanks for your feedback.
 

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It does cool whilst driving using a liquid to remove heat and cool it. However when it becomes excessive and the liquid cooling system cannot reduce it to within preset parameters it requires the heatpump to provide extra cooling. Because the heatpump can reduce range significantly it will not kick in automatically but advise you when you stop to plug the car in to top up the battery/run the heat pump and then press start.

So put simply yes it cools whilst driving but dependent on regional temperature it may not cope. Achillies heel for the mx30 in hot temperatures perhaps?

That is my understanding

Alan
 

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It does cool whilst driving using a liquid to remove heat and cool it. However when it becomes excessive and the liquid cooling system cannot reduce it to within preset parameters it requires the heatpump to provide extra cooling. Because the heatpump can reduce range significantly it will not kick in automatically but advise you when you stop to plug the car in to top up the battery/run the heat pump and then press start.

So put simply yes it cools whilst driving but dependent on regional temperature it may not cope. Achillies heel for the mx30 in hot temperatures perhaps?

That is my understanding

Alan
 

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That was not the way it was explained and I never heard the compressor driving unless the air was on. However, in our valley during the summer it is always over 100 degrees. We have consecutive days over 104 to 108. This year 25 days in a row. The cooling system is not adequate for our climate. We had the car overheat several times a day and you don’t get the warning until you shut the car off. I checked with the factory rep. and they said that was the way it was designed. It might be a good car for the UK but not for hot climates. Mazda refused to take it back so after 4 months I sold it back to the dealer and lost over 7,000.00. I am done with Mazda and I bought four cars at that dealership
 

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Gary, I was told that the cooling was done within normal range via a radiator at the front of the car using a 12v pump for circulation. The heatpump is on a valve from the cooling system. When you press start you open that valve which diverts the coolant via the heatpump system to enable additional cooling. Its seems Mazda were stuck between remaining range and distance to charger so instead of giving the driver a start option on the move (because the driver could monitor the remaining range and make a reasoned decision) they opted out and went for when stopped. Even when stopped you might not be at a charger anyway so make of that what you will. This, to me, is all down to the small battery size. Larger battery vehicles may have a built in algorithm that will make that decision for you...dont honestly know. Apologies if I was misinformed but that was how Mazda explained it to me at the dealership.

Alan
 

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Indeed, automatic battery temperature control is part of modern EV designs. Mazda, probably feeling constrained by the small battery, has chosen not to automate it. Here is a nice article that includes a layout of the tesla system. The mazda one would look very similar in fact though without the clever component integration beloved by Tesla. As all the physical components are there, Mazda could easily retrofit software automation if they chose to. https://jalopnik.com/the-tesla-model-3s-superbottle-easter-egg-is-a-fascin-1830992728
 

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Further to the above, I, at last, have been able to see the manual for the new Ariya. This excerpt from the manual says it all.
* The Li-ion battery cooler will automatically
turn on when the Li-ion battery temperature
rises during driving or quick charging. It will
keep the Li-ion battery temperature to a level
that does not activate power limitation or
charging inhibition. This function is useful
when driving a long distance with repeated
use of quick charger.
* When the Li-ion battery cooler operates, more
electric power will be consumed than in
normal driving condition, which could result
in a decreased energy economy and driving
range. Avoid unnecessary acceleration and
deceleration and drive at a moderate speed.
 

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I had a Mazda tech get online with the factory tech line and ask two questions. First why isn’t it automatic and 2nd can I turn it on manually without getting the warning. They said they intentionally programmed it this way because they don’t know how much battery you have left or how far you are from a charger. On the second question is no you can turn it in until the warning comes up and that doesn’t happen until the battery hits 104 degrees. That means you could be driving all day in the heat and not even know it until you shut off the car. Where I live we will have 60 plus days of over 100 degrees during the summer. It got to the point that it happened twice a day every day. I told Mazda it was a bad design and I wanted to return it under the lemon law. I even had a lawyer working on it and Mazda declined because the car was working as designed. The lawyer said to take it any further I would have to sue Mazda. They have more lawyers and money than me so I sold it back to the dealer at a loss. I have had 4 Mazdas but this will be my last
Thanks for the info. I have had my car for two years, and this issue only occurred to me once after a long drive in the heat and multiple fast charges. I could not understand why I was warned to do something the car should do automatically. I will now keep my eye on the battery temperature. Luckily this is, in my climate, likely to be an incident only.
 
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