Check Housing Of Lithium-Ion Battery - AR47.70-P-0017-02A

Model all (CAR) 

Mechanical protective cover/housing damaged: B1a/b cracks or openings and be recognized on the housing 

1. Check lithium-ion battery for cracks or openings (arrows) e.g. caused by breaking off the housing parts.

   If cracks or openings are detected, there is a danger of possible internal damage or possible ingress of foreign objects or fluids, which can lead to damage or short circuits in the lithium-ion battery,

   ↓

   Immediately make an emergency call under the respective location-specific and country-specific emergency call number and do not touch the high-voltage battery; vacate the danger zone.

   Courtesy of MERCEDES-BENZ USA

   Mechanical protective cover/housing damaged: B2a/b critical dent depths/deformation of the housing exceeded 

2. Check the housing of the lithium-ion battery incl. threaded connections, attaching parts, and, if applicable, attaching parts that are attached firmly to the housing for mechanical deformation.

   If any dents or deformations are detected, there is a potential danger of internal damage, which can lead to damage or short circuits in the lithium-ion battery. The maximum permissible dent depth is 2 mm.

   If there is a problem,

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   Perform operation steps 3 to 5.

3. Determine height of straightedge, scale ruler or contact angle as a point of origin at the non-deformed housing contour (arrow c).

   Commercially available devices/tools 

   Vernier caliper with a round measuring blade with a diameter of 1.5 mm Straightedge, ruler, or a contact angle

   For measuring the dent depths, it is important to measure the dent depths against a reference line (original, not deformed, housing contour) using suitable aids e.g. a straightedge, a ruler, or a contact angle.

   Courtesy of MERCEDES-BENZ USA

4. Measure maximum dent depth (d) and evaluate.

   Dent depth (d) < 2 mm: Transport approval Dent depth (d) > 2 mm: No transport approval

   If the maximum dent depth (d) prevents transport approval,

   ↓

   contact the responsible MPC/general representative.

   Courtesy of MERCEDES-BENZ USA

   Mechanical protective cover/housing damaged: B3 all dents/deformations must be recorded with the measured dent depths in the table 

5. Record all dents/deformations with location, type, and dent depths.

   Enter the lengths, widths, and depths of the dent depths. Record location of the dents/deformations in the drawing in the "analysis sheet for the transportability of high-voltage batteries form."

   Courtesy of MERCEDES-BENZ USA

   Mechanical protective cover/housing damaged: B4 Electrical connector and its surroundings damaged 

6. Check electrical contacts (plug, bushes, bolts, posts etc.) and check connections of the lithium-ion battery for damage (arrows).
7. 1. 7.1 If an electrical contact (plugs, bushes, bolts, posts etc.) of the lithium-ion battery is damaged. Contact the responsible MPC/general representative and determine further safety precautions so that touching live parts is safely prevented.
   2. 7.2 If no electrical contact (plugs, bushes, bolts, posts etc.) of the lithium-ion battery is damaged. Cover contacts (plugs, bushes, bolts, posts etc.) with battery-specific cover caps so that touching is ruled out and ingress of objects and fluids is safely prevented.

      Courtesy of MERCEDES-BENZ USA

   Mechanical protective cover/housing damaged: B5 pressure relief device triggered/open/damaged 

8. Check pressure relief device for integrity.

   If the pressure relief device is triggered or if the pressure relief device is open,

   ↓

   Check lithium-ion battery for electrolyte leakage.

   Check lithium-ion battery for electrolyte leakage 

   Courtesy of MERCEDES-BENZ USA

9. Check lithium-ion battery for pungent odor caused by leaking electrolyte.

   Avoid direct skin contact with electrolyte that may have leaked. Electrolyte is volatile and has a pungent odor.

10. Wear personal protective equipment (PPE) or location/country-specific protective clothing when working with electrolyte.

    If a pungent odor is noticeable.

    Personal protective equipment for working with electrolyte consists of the following parts:

    Protective gloves (standard EN 60903.2012 class 0 (designation A (acid), A+H (acid + oil), or R (acid + oil + ozone))). Tightly fitting safety glasses, goggles, or face protection shield.

    Long-sleeved protective clothing. Respiratory protection-depending on the amount of electrolyte released and the intensity of the release.

11. Inspect housing of the lithium-ion battery for signs of electrolyte leakage.

    Avoid direct skin contact with electrolyte that may have leaked.

    Electrolyte may have different colors depending on the reaction (from light/clear to dark/opaque). If the cell only has mechanical damage, the electrolyte is clear.

    If there is an electrolyte leakage.

    ↓

    Evacuate danger zone and keep a safe distance. Ensure that working area is well ventilated.

    Wait for possible reaction of electrolyte (at least 20 min). Bind escaped electrolyte with an absorber (vermiculite) and transfer to containers designated for disposal.

    Clean component parts with shop towel and transfer shop towels to containers designated for disposal.

    If the prerequisites for removal are not met in the event of electrolyte leakage, make an emergency call to the respective location-specific and country-specific emergency call number immediately; do not touch high-voltage battery and vacate danger zone.