When the charging box is impacted: The IK10 impact-resistant structure design of the custom stainless steel EV charging box

I. Public charging piles may currently suffer more fatal damage from impacts than from rusting due to rain

In the daily operation and maintenance of public charging stations, the rate of box damage often exceeds expectations:

• When a novice driver slightly scratches the charging pile while reversing, the ordinary iron box is directly dented and deformed, and the door panel cannot close normally.
• When unattended at night, the box body is damaged by human kicking, hammering or even lock-picking, exposing and damaging the internal modules.
• The outdoor charging pile distribution box was hit by falling branches, hail or construction flying stones, and the thin-walled box body was instantly perforated.

      These scenarios point to the same core indicator: the ability to resist external mechanical shocks. Unlike home charging piles that are securely hung in private garages, public charging boxes must confront the problems they encounter in outdoor environments. However, at present, a large number of charging boxes on the market still use 1.0mm or even 0.8mm thin plates, which only meet the basic protection requirements and are far from reaching the mechanical strength needed in public environments.

II. IK Level Interpretation: What is IK10? How powerful is it?

The IK grade is the protection level of enclosures against external mechanical shock as defined by the IEC 62262 standard, ranging from IK00 (no protection) to IK10 (maximum protection), with a total of 11 levels. For public charging facilities, IK10 is recognized as the highest safety benchmark in the industry.

The stainless steel EV charging box of Ouyue Electric was designed with IK10 as the benchmark target from the very beginning, ensuring that the box structure remains intact and the internal charging module is safe and worry-free under the vast majority of accidental and intentional impacts.

III. The secret behind the Ouyue Electric IK10

1. Reaching IK10 is far from being as simple as "thickening the sheet".

Ouyue Electric builds an impact-resistant system from two dimensions: material selection and welding process304 stainless steel plates starting from 1.5mm.

The impact resistance of stainless steel distribution boxes first comes from the material itself. The yield strength of 304 stainless steel is ≥205MPa, which is more than 1.5 times that of ordinary cold-rolled steel plates. We offer differentiated material selection based on different installation environments.

Sheet thickness	Applicable model	Shock-resistant target
1.5mm	Standard version	Basic protection for IK09
2.0mm	Enhanced version	IK10 Core area
2.5mm	Extreme Environment Edition	IK10+ Safety redundancy

2.The welding quality of the box directly determines the overall impact resistance performance. 

Ouyue Electric uses a robot welding workstation to perform full welding on the four corners of the main box.

• Unlike traditional manual spot welding (where only a few points are subjected to force), the robot welding gun moves at a constant speed along the seam, and the penetration depth is uniformly controlled at 70% to 80% of the plate thickness.
• The weld seam undergoes pickling and passivation treatment, ensuring both strength and corrosion resistance simultaneously.
• For the four corners of the door frame that are most frequently impacted, additional corner support plates are welded to form a stable triangular structure.

IV. From design to prototyping: Deliver a stainless steel charging case that can withstand impact within 7 days

Whether you are providing charging facilities for highway service areas, urban roadside parking Spaces, or underground garages of shopping malls, Ouyue Electric can tailor structural solutions based on your specific requirements for IK levels.

We promise that the finished product can be made within just 7 days after the product drawings are confirmed. Welcome to send your installation scene photos, expected protection level and box size requirements.

Our engineers will provide a complete technical solution including the layout of reinforcing ribs, hinge selection and surface treatment suggestions. Keep your charging box as sturdy as ever even in the harshest public environments.