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Rivian Plant Battery-Pack Fire: What Happened and What Caused It?

A battery pack reportedly entered thermal runaway while being tested in a repair area at Rivian’s Normal plant. The initiating cause remains unestablished in available sources.
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The Rivian plant battery-pack fire most likely referenced by this headline happened on May 28, 2022, at the company’s Normal, Illinois, plant. The Town of Normal lists the incident as a battery-pack fire. A contemporaneous report says the pack was in a repair area and being tested before thermal runaway began—but the available sources do not establish what started the failure or show that testing caused it.

What happened at Rivian’s Normal plant?

The Town of Normal’s archive records a May 28, 2022, incident titled “Normal Firefighters Respond to Battery Pack Fire at Rivian Automotive Plant,” with the entry time listed as 5:07 p.m. Town of Normal incident archive.

InsideEVs reported that the battery pack was in a repair area and undergoing testing when thermal runaway began. That describes the circumstances immediately before the event, not a confirmed explanation for why the pack failed. The available reporting does not identify a failed cell, component, procedure, or other initiating event. InsideEVs report.

Is the cause of the fire known?

No specific root cause is established in the available sources. The Town’s archive confirms the incident but is not a final investigative report; the secondary report supplies testing context without resolving what initiated the thermal runaway. It would therefore be inaccurate to say that testing caused the fire or to name a particular defect as the cause.

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Is this the same as Rivian’s other plant fires?

No. Reports describe separate incidents at different times and with different circumstances. They should not be combined to fill gaps in what is known about the May 2022 battery-pack fire.

Date Reported incident What the source says
October 26, 2021 Small fire in an automated battery sub-assembly area Normal reported that firefighters cooled cells to prevent thermal runaway. The report said there was minimal smoke, no building damage, and no effect on assembly operations. Town of Normal report.
February 5, 2022 Vehicle fire inside the plant The fire department said a sprinkler was flowing and suppressing the fire when crews arrived, and damage was limited to one vehicle. Its notice said the cause was under investigation. Normal Fire Department notice.
May 28, 2022 Battery-pack fire at the plant The Town’s archive confirms the incident listing. A separate report describes a pack in a repair area being tested before thermal runaway; the available sources do not establish the root cause. Town of Normal archive and InsideEVs report.
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What does Rivian’s battery-fire guidance say?

Rivian’s June 10, 2024, R1S emergency-response guide is intended for emergency responders dealing with vehicle incidents. It says only firefighters should extinguish a high-voltage battery fire and calls for sustained, high-volume water application and thermal monitoring. This is vehicle-response guidance, not evidence of the procedure used at the Normal plant in 2022, and it is not consumer advice. Rivian R1S emergency-response guide.

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