Recovering Accident-Damaged EVs: Quarantine, Storage and Transport

1. Why a Damaged EV Is a Different Recovery Job

Once a crashed petrol or diesel car is parked in the yard, its main hazards are largely under control. An accident-damaged electric vehicle does not follow that pattern: the hazard travels with the vehicle, and it can grow rather than shrink after it has left the scene.

Four characteristics set a damaged EV apart.

• Stranded energy. A traction battery that has been damaged in a collision still holds most of its stored energy, and that energy can no longer be drawn off in the normal way. The pack cannot be made safe simply by switching the vehicle off.
• Delayed thermal runaway. Mechanical damage can create internal short circuits in individual cells. A damaged high-voltage battery can enter thermal runaway hours or even days after the collision. The US National Transportation Safety Board, in its 2020 safety report on emergency response to EV fires (SR-20/01), described fires that reignited after vehicles had been towed from the scene.
• Re-ignition. A battery fire that appears to be out can start again, because cells deep inside the pack can keep heating after the visible flames have gone. Our explainer on why damaged packs reignite days later describes the mechanism in detail.
• Toxic gas. Venting and burning lithium-ion cells release hydrogen fluoride alongside flammable gases. For recovery crews and yard staff who work close to the vehicle, the gas can be as serious as the fire; see our guide to toxic fluoride gases from a burning pack.

The roadside assessment therefore has to consider the battery, not just the bodywork, and every destination needs a plan for holding a vehicle that may still be unstable.

2. At the Roadside: Assessment and Isolation

The first decisions are made at the scene, often under time pressure. A short, repeatable routine helps crews make them consistently.

2.1 Identify the vehicle and get the rescue sheet

Start by confirming the drivetrain. Badges are unreliable after a crash; charging ports, the absence of an exhaust and a registration lookup are better indicators.

Next, obtain the manufacturer’s information. ISO 17840 defines the format of rescue sheets and emergency response guides (ERGs) for first and second responders. A rescue sheet shows where the high-voltage battery, cables and components sit and where it is unsafe to cut; the ERG explains how to immobilise the vehicle, disable the high-voltage system and handle a damaged or burning battery. In the United States, NHTSA requires manufacturers to submit ERGs in the ISO 17840 format from 1 January 2026. For fire and rescue services, CTIF published an operational guide to emergency response to electric vehicles in December 2025, which recovery operators can use to understand what the fire service will do on arrival.

2.2 Signs of battery damage

Look for evidence that the traction battery itself has been affected, not only the body around it.

• Smoke or vapour from the underbody or wheel arches, even in small amounts
• Hissing, popping or crackling sounds from the battery area
• An unusual sweet or chemical smell
• Heat that can be felt or measured at the battery casing
• Deformation, punctures or scraping damage to the underbody or battery enclosure
• Leaking fluid from the battery area, including coolant
• High-voltage warning messages on the dashboard, or an impact severe enough to deploy airbags
• Submersion in water, which some manufacturers treat as damage in its own right

2.3 Isolate the high-voltage system per OEM guidance

Follow the ERG for that make and model. The steps differ between manufacturers, and improvised isolation can expose crew to high voltage. Typical instructions cover immobilising the vehicle, switching it off, keeping the key at a distance and disconnecting the low-voltage supply or a designated disconnect point. Never cut orange high-voltage cables, never attempt to open the battery enclosure at the roadside, and assume that the battery remains energised after isolation. Isolating the system reduces the risk of electric shock; it does not discharge the battery or remove the risk of thermal runaway.

2.4 When to call the fire service

When the emergency services supervise the recovery, ADR contains an exemption in 1.1.3.1 (d) for carriage undertaken by or under the supervision of the emergency services, insofar as it is necessary for the emergency response, including breakdown vehicles carrying vehicles that have been involved in accidents. Outside that situation, the normal rules on carrying the vehicle as a load apply. Whether the exemption covers a given movement depends on the circumstances, so agree your standard position with your Dangerous Goods Safety Adviser (DGSA).

3. Classifying the Vehicle for Carriage

An electric vehicle carried on a recovery truck, low loader or car transporter is dangerous goods of Class 9 in its own right. The classification depends on the battery chemistry and on whether the battery has been damaged.

3.1 The UN number

Since the 2025 edition of ADR, vehicles powered only by lithium-ion batteries are assigned to UN 3556 VEHICLE, LITHIUM ION BATTERY POWERED, with UN 3557 for lithium metal and UN 3558 for sodium-ion. Before that change, battery electric vehicles were carried under UN 3171, which now covers only vehicles and equipment powered by wet batteries, sodium batteries or sodium alloy batteries. Hybrids with an internal combustion engine remain under UN 3166. Older procedures, documents and training material that still refer to UN 3171 for battery electric cars should be updated.

Special provision 388 requires batteries and other dangerous goods that are integral to the vehicle to be securely installed. Under special provision 666, a vehicle carried as a load, together with the dangerous goods needed for its operation, is not subject to any other provisions of ADR provided its conditions are met. For a battery electric car, those conditions mostly concern fuel systems that it does not have and the marking and labelling of vehicles that are fully enclosed in packaging.

3.2 Special provision 667: damaged batteries in vehicles

Special provision 667 deals with lithium and sodium-ion batteries installed in damaged or defective vehicles. In that case the battery does not need to meet the usual requirements of 2.2.9.1.7, but the shipper has to make a judgement about the damage.

The last part of Step 3b matters for recovery operators, because removing a crash-damaged battery at the roadside is rarely safe or practical. Moving the vehicle with its battery installed does not make the battery any safer; the risk has to be managed through where the vehicle goes and how it is held on arrival.

Once the battery is out, it becomes a separate consignment with its own classification. The removed pack is assessed under SP 376 and packed under P908/LP904 or P911/LP906 according to its condition. Our detailed article on assessing a removed pack under SP 376 walks through that judgement. Because the wording of these provisions is precise and changes between editions, recovery companies should have their procedures reviewed by a DGSA against the edition of ADR in force.

4. Quarantine: Holding a Vehicle That May Still React

A damaged EV that has been moved with its battery installed should not go straight into a workshop, a covered car park or a row of other vehicles. It belongs in a technical quarantine area first.

4.1 What a technical quarantine area is

The German fire protection association vfdb describes the concept in its leaflet MB 06-10, Technical quarantine areas for damaged vehicles with lithium-ion batteries. In short, the area is a paved surface with no flammable objects, other vehicles or buildings close by, where a damaged vehicle can be observed and where a fire, if one starts, can burn or be fought without spreading. Clear access for fire appliances and a water supply within reach are sensible additions.

4.2 Distances: follow the OEM and the fire service

There is no single, universal separation distance. Recommendations differ between manufacturers and between guidance documents, and figures from roughly 5 metres to 15 metres are cited. The right distance for your site depends on the vehicle, the surroundings, the construction of nearby buildings and the fire service’s own approach. Use the manufacturer’s emergency response guide for the specific model and agree the layout with your local fire service rather than applying a number taken from another context.

4.3 Monitoring and observation

Quarantine only works if someone is watching. Monitoring options include:

• Regular checks with a thermal imaging camera, focusing on the underbody and battery area
• Temperature measurements recorded at fixed intervals, so that a rising trend is visible
• Visual and audible checks for smoke, vapour, hissing or popping
• Remote thermal cameras or detection linked to an alarm for unstaffed hours

5. Storage at Yards, Body Shops and Auction Sites

After quarantine, many damaged EVs spend weeks on site awaiting an insurer’s decision, parts, a salvage auction or dismantling. Site layout determines whether a single battery fire stays a single-vehicle incident.

5.1 Layout and separation

• Dedicated EV zone. Keep damaged EVs in a defined area, apart from combustion-engine stock and away from buildings, fuel stores and combustible materials. Mixed rows of tightly parked vehicles let a fire jump from car to car.
• Gaps and rows. Leave space between vehicles in the EV zone and avoid parking them nose to tail against walls or fences.
• Fire service access. Keep routes clear for appliances, know where the nearest hydrant or water supply is, and give the local fire service a site plan that marks the EV zone.
• Identification. Mark each vehicle clearly as an EV, with its damage status, date of arrival and whether it passed quarantine. Staff moving vehicles with a forklift or telehandler need to know which ones carry a damaged traction battery.
• No charging. Do not charge damaged EVs on site unless the manufacturer’s procedure explicitly allows it.

Body shops should also decide where a damaged EV waits before it comes indoors, and how it would be moved out quickly if it showed warning signs. For the wider principles of separation, detection and site planning, our guidance on planning safe yard storage for lithium stock covers both indoor and outdoor sites.

5.2 What insurers expect

6. Removing the Traction Battery

For many accident-damaged EVs, the traction battery eventually has to come out: because SP 667 requires it before onward carriage, because the vehicle is a total loss and will be dismantled, or because the battery is to be repaired, assessed or recycled separately. This is the point at which the hazard can be separated from the vehicle.

6.1 Qualified people and controlled conditions

Battery removal is high-voltage work, to be carried out only by technicians trained and authorised for high-voltage systems, following the manufacturer’s information for that model and national electrical safety rules. Insulated tools, suitable PPE, a lifting table rated for the pack weight and a cordoned work area are basic requirements, in a location from which the pack can be moved away quickly if it starts to heat.

6.2 Assess the pack before and after removal

The same signs that matter at the roadside matter here: heat, smoke, smell, noise, swelling, leaks and visible damage to the enclosure. Where the manufacturer’s diagnostic tools are available, battery management data such as cell voltages, temperatures and fault codes can add evidence. The assessment should be recorded, because it drives the classification of the removed battery.

6.3 Classifying the removed pack under SP 376

A removed battery that is damaged or defective is classified under special provision 376. The outcome determines the packing instruction.

For crash-damaged packs, the P911/LP906 route is common, because the internal condition of the cells is hard to establish after a heavy impact. Packaging for this tier must be shown to contain the effects of a thermal runaway, and it is worth understanding the certification route behind LP906 packaging before selecting a supplier.

7. Transporting and Storing the Removed Battery

A removed traction battery may go to the manufacturer, a repair specialist or a recycler, often after days or weeks on site. The packaging chosen at removal therefore has two jobs: carriage and storage.

7.1 Modes of transport

Damaged and defective batteries packed under SP 376 can be carried by road (ADR), rail (RID) and sea (IMDG Code), subject to the packing instruction and any carrier acceptance policies. Air is closed: under the IATA rules, damaged or defective batteries with the potential to produce a dangerous evolution of heat, fire or short circuit are forbidden. Our comparison of the maritime and aviation regimes explains why damaged packs cannot fly and what sea carriage requires instead. Many removed packs go back to the vehicle manufacturer, and a worked scenario for workshop battery returns shows how a manufacturer’s dealer and workshop network can organise that flow. Packs that are beyond repair continue on the onward journey to a licensed recycler, where triage, waste shipment rules and intake storage apply.

7.2 Where BUNCKER® fits

BUNCKER® does not contain whole vehicles. Its role begins once the damaged traction battery, or its modules, has been removed. From that point, the BUNCKER® Pro Line Heavy range provides certified containment for transport by road (ADR), sea (IMDG) and rail (RID) and for indoor and outdoor storage, at dismantlers, recovery and salvage yards, and recyclers.

All six models are UN LP906 certified: the side-loading SDR (45.8 kWh), for batteries in any status, and the S (50 kWh), M (90 kWh), L (90 kWh), XL (100 kWh) and XXL (200 kWh). The units are built around a patented bell jar: the battery sits on the base, the containment body lowers over it and seals, and no sand, vermiculite or other filler material is needed. The Fibercon Altilium® CP Blanket (FACB) chemically neutralises HF, and the outer surface stays below 100 °C during a full thermal runaway. Units are made in the Netherlands by VDL, supported by a certified service and inspection programme and delivered from stock. Because the same unit serves for carriage and storage, a removed pack can stay in it from the dismantler’s workshop to the recycler without repacking. Ask for the certificate documentation to share with your DGSA and insurer, and see how P908, P911 and LP906 compare before deciding which tier a removed pack needs.

Fit must be checked for each pack. Traction batteries differ widely in footprint, height and weight between makes and models, so compare the dimensions and mass of the pack, including any lifting frame, with the product space and maximum battery weight of the model you are considering. The Model XXL, for example, has a product space of 2520 × 1720 × 550 mm and a maximum battery weight of 1,540 kg. Our list of questions to ask before buying containment helps structure that comparison, and you can compare all six Pro Line Heavy models side by side. Where a dismantler separates a pack into modules, or handles batteries of mixed condition, side-loaded containment for loose modules avoids matching each item to a different packaging type. Recyclers receiving removed packs from yards and dismantlers can find containment set-ups for recycling plants on our solutions page.

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BUNCKER® Model XXL for Removed Traction Batteries

Certified containment for large removed EV packs, rated up to 200 kWh, with HF neutralisation and no filler materials. UN LP906 certified for road, sea and rail transport and for indoor and outdoor storage. Always check fit against the dimensions and weight of your specific pack.

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8. Checklist From Roadside to Recycler

Use this checklist to set up or review your procedure for accident-damaged EVs. Each point should be supported by a written procedure, a record or a certificate.

• ✅ Identification and ERGs. Do crews confirm the drivetrain and access the ISO 17840 rescue sheet and ERG at every job?
• ✅ Damage signs. Is there a written list of battery warning signs, and are crews trained to recognise them?
• ✅ HV isolation. Is isolation always carried out according to the OEM’s guidance, never improvised?
• ✅ Fire service escalation. Is there a clear rule for when to call the fire service and stay clear?
• ✅ Classification. Are vehicles classified under UN 3556 (or UN 3557 or UN 3558 where relevant), with old UN 3171 references removed from procedures?
• ✅ SP 667 decision. Is the judgement on battery damage made and recorded by a competent person, and reviewed by your DGSA?
• ✅ Quarantine area. Does each receiving site have a paved quarantine area clear of buildings, vehicles and combustible materials, laid out with the fire service?
• ✅ Monitoring and release. Are thermal imaging and temperature checks logged, and is release based on OEM and fire service guidance?
• ✅ Yard layout. Are damaged EVs held in a dedicated, marked zone, separate from combustion stock, with access for appliances?
• ✅ Battery removal. Is removal carried out only by HV-qualified technicians, following OEM information, in a location that allows rapid evacuation of the pack?
• ✅ SP 376 classification. Is each removed pack assessed and packed under P908/LP904 or P911/LP906, with uncertain packs treated as critical?
• ✅ Containment fit. Has the pack’s footprint, height and weight been checked against the product space and weight limit of the containment unit?
• ✅ Mode planning. Are removed packs routed by road, rail or sea only, never by air?