https://www.firehouse.com/rescue/article/12393387/university-of-extrication-electric-plugin-vehicle-stabilization-part-3 University of Extrication: Electric Plug-In Vehicle Stabilization - Part 3 March 1, 2018 Ron Moore
[image https://cdn.firehouse.com/files/base/cygnus/fhc/image/2018/01/640w/DSC_0226.5a68c03edc072.jpg The Nissan LEAF EV assumed a nose-down position when roof-resting. The vehicle could easily be rocked forward and backward until it was stabilized. Photos by Ron Moore videos https://youtu.be/uyWTyXt8I50 https://youtu.be/Y-9eyYMSoFs https://youtu.be/-zO5E4c9uRo https://youtu.be/uyWTyXt8I50 ] Ron Moore discusses how to accomplish effective stabilization of a roof-resting Electric Plug-In Vehicle. Topic: Electric Plug-In Vehicle (EV) Stabilization, Part 3 Objective: Accomplish effective stabilization of a roof-resting EV Task: Given a roof-resting EV with a floorpan-mounted high-voltage lithium-ion battery, the rescue team shall recognize the unusual stabilization challenges and be able to effectively adapt their rescue and stabilization techniques accordingly. The final part of this three-part series on Electric Plug-In Vehicle (EV) stabilization offers several stabilization tactics that can be used when an EV is encountered in a roof-resting position at an incident scene. The Mitsubishi i-MiEV and the Nissan LEAF used for this research, like other similar EVs, have a very round, dome-shaped roof and a heavy floorpan-mounted high-voltage (HV) lithium-ion battery. When rolled into a roof-resting position, the rounded-roof Mitsubishi settled into an almost level, horizontal position. In contrast, the Nissan LEAF vehicle assumed a “front-end down” position. During the research, two stabilization techniques were found to be effective for these EVs. A simple stabilization tactic using cribbing may be used, but using cribbing and struts is the recommended procedure, especially when more involved extrication work is anticipated. To stabilize the Mitsubishi EV that assumed an almost level position, inverted step chocks and wedges worked well and immediately eliminated all of the vehicle’s forward/rearward rocking action. The cribbing fits into the curved area where the roof pillars come closest to the ground. This initial “wedging” technique is advised when beginning stabilization of this roof-resting EV. Unlike when a conventional internal engine vehicle rolls over, a roof-resting EV has its heavy lithium-ion battery directly above the patient and your extrication work area. Remember, the Tesla battery weighs 1,000 pounds. Even the smaller Chevy Bolt EV has a 600-pound battery mounted below the floorpan, which would actually be above the patient in a rollover situation. A more secure stabilization tactic needs to be employed to more fully stabilize the vehicle and also support the weight of the car and the HV battery. Struts would seem logical to be part of the equipment to stabilize a roof-resting EV, but there is no location along either side of the EVs where struts could be placed where they would not interfere with door opening and patient access. Struts can, however, be used with ratchet straps and clusters to stabilize and support the EV at the rear after initial cribbing and step chocks are placed at the front-end A-pillar area. A pair of struts can effectively stabilize the EV from the rear as well as support the weight of the HV battery. If the rear hatchback can be opened, that offers additional contact points for the struts. To demonstrate how the weight of the HV floorpan-mounted affects vehicle stability, a roof-resting LEAF was fully stabilized, then all roof pillars on the passenger’s side of the vehicle were cut through. The vehicle dropped a half inch during this experiment. All cribbing and struts were then removed, leaving the LEAF supporting itself as it rested on its roof. All the roof pillars on the driver’s side of the vehicle were cut through one at a time. As these cuts were being done, the vehicle sunk lower and lower with every pillar cut. Eventually, the EV dropped a total of 8 inches due to the weight of the HV battery pressing down on the structure of the vehicle. Roof-resting EVs can be initially stabilized by wedging the front A-pillars and the rear C- or D-pillar and roofline area. With cribbing at the front, struts placed at the rear of the EV maintained good overall vehicle stability and allowed for unobstructed door access on both sides. [© firehouse.com] + http://www.govtech.com/fs/transportation/EV-Advocates-Rally-for-More-Charging-Stations-in-Texas.html EV Advocates Rally for More Charging Stations in Texas February 27, 2018 - Proponents for the electric vehicle infrastructure argue that funds from the Volkswagen emissions cheating settlement could provide the money needed to build out the charging stations ... https://uspirg.org/sites/pirg/files/reports/US%20Plugging%20In%20Feb18%20%281%29.pdf https://www.manufacturing.net/news/2018/03/manufacturers-successfully-extend-deadline-add-noise-electric-cars Manufacturers Successfully Extend Deadline to Add Noise to Electric Cars 03/01/2018 The rule required that the artificial sound be played outside the car when the vehicle is moving under 18.6 miles per hour forward or reverse. It applies to “all hybrid and electric light vehicles with four wheels and a gross vehicle weight rating of 10,000 pounds,” NHTSA said. Accordingly to NHTSA, road and wind noise ... 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