[HN Gopher] Electric car batteries last longer than expected (st...
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       Electric car batteries last longer than expected (study) -
       ecomento.de
        
       Author : xbmcuser
       Score  : 28 points
       Date   : 2024-11-21 18:24 UTC (4 hours ago)
        
 (HTM) web link (ecomento.de)
 (TXT) w3m dump (ecomento.de)
        
       | clintfred wrote:
       | Using Firefox's built-in translation...
       | 
       | > The key results: In the first approximately 30,000 kilometres,
       | the loss of capacity is accelerated, and the so-called state of
       | health (soH) drops relatively quickly from 100 to around 95
       | percent. With increasing mileage, real degradation decreases.
       | According to the Electrive portal, Aviloo data from the 7,000
       | vehicles showed a (average) SoH of around 90 percent at 100,000
       | kilometres. According to this, the trendline is almost
       | horizontal, between 200,000 and 300,000 kilometres, it is almost
       | stable - and is well above the 70 to 80 percent of the battery
       | guarantee. In fact, it is rather 87 percent.
        
         | bdcravens wrote:
         | Seems pretty consistent with ICE engines, where you can expect
         | roughly a 5-10% loss in efficiency once you get over 100k miles
        
           | clintfred wrote:
           | I don't think I realized that ICE engines had this kind of
           | degradation. What causes this? Seals and parts loosening as
           | they break in? Some loss of efficiency in the fuel
           | mixing/burning process?
        
         | VincentEvans wrote:
         | So basically in other words what this means - is that if
         | battery capacity was over-provisioned by mere 13 percent with
         | battery firmware keeping it essentially hidden - then in effect
         | there would not be any degradation at all.
        
           | lokimedes wrote:
           | That raises the question og whether they study factored this
           | into their analysis. Don't carmakers already overprovision?
        
           | Night_Thastus wrote:
           | They already over-provision to prevent users from charging
           | the last few percent. That top end is where the most
           | significant degradation happens when charging.
        
       | rootusrootus wrote:
       | This isn't really news, just another study confirming past
       | results. And of course it correlates really well with mountains
       | of real world data from places like Teslafi.
        
       | Rygian wrote:
       | I still remember vividly a self-made expert explaining to his
       | friend, in the London subway, that "yeah batteries only last 8
       | years, then you have to swap them out, ergo electric cars are a
       | dumb idea".
       | 
       | But I still trust in people's capacity to digest being utterly
       | wrong -- eventually.
        
         | theshrike79 wrote:
         | I'm hoping that my car's battery only lasts for 7.9 years. It
         | has an 8 year guarantee :D
         | 
         | Then I'd get a new one and my car would be practically new for
         | 8 more years.
        
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       (page generated 2024-11-21 23:02 UTC)