Tesla files patent for a system to isolate damaged battery cells

Tesla recently filed a patent on a new technology that could make its battery packs safer. The system is designed to isolate damage caused by failed battery cells, and prevent them from affecting intact cells in the pack.

When battery cells fail, they typically release hot gases that can spread the damage to nearby cells. Tesla’s patent describes the use of two interconnects that would be positioned over multiple battery cells, as well as a top plate with weak areas designed to rupture when failed battery cells release heat and create pressure.

“The system may include features or material to thermally insulate the battery cells from the heat generated by other cells…such as a polymer-based insulating material or another type of insulating material,” reads the patent in part. “The system may also include features, such as a cold plate or heat pipes, to remove heat generated by the battery cells…The features or material to perform this electrical insulation may include the interstitial material or a sleeve…In alternate embodiments, an air gap may provide the necessary electrical isolation. The energy storage system may [also] include features or material for directing the hot-gas discharge during failure of a battery cell.”

 

Source: Teslarati

  • Ormond Otvos

    This patent is so vague, and has so many different maybe’s in it, it might just be a pre-emptive CYA generated by the (few) fires that have occurred.

  • EVman88

    Tesla has a lot of insurance claims that the cars are catching on fire. Numbers are rising rapidly. many cars catching on fire while driving down the road and some catching fire while just sitting and charging. BIG BIG problems not being reported by the press. TESLA NEEDS TO CONTACT ME TO FIX THE PROBLEM AND FIX THEIR BMS PROBLEM. THEY WONT BECAUSE THEY THINK THEY KNOW EVERYTHING.

  • bart koens

    is this supposed to be the text of the patent ?

    “The system MAY include features or material to thermally insulate the
    battery cells from the heat generated by other cells…such as a
    polymer-based insulating material or another type of insulating
    material,” reads the patent in part. “The system MAY also include
    features, such as a cold plate or heat pipes, to remove heat generated
    by the battery cells…The features or material to perform this electrical
    insulation MAY include the interstitial material or a sleeve…In
    alternate embodiments, an air gap may provide the necessary electrical
    isolation. The energy storage system MAY [also] include features or
    material for directing the hot-gas discharge during failure of a battery
    cell.”

    if the US patent office allows patents on such texts , I’dd like to patent the solution to evrything.
    😉

  • Texas Compadre

    This is a joke. Every company designing a battery for EV applications has been employing all of these measures in some combination for many years.

    • eveee

      Which EV company is designing with over 10 parallel cells with individual fuses? Tesla is the only one. Which EV company besides Tesla is using intumescent material?

      Most EVs use 2 to 3 parallel pouch cells with nothing between them. About three are housed in a metal box. Flame might not get through, but heat is another matter.