Customer Stories

IPX9K Battery Rain-Exposure Test Solution

Purpose of the Plan

The IPX9K battery rain‑spray test is an important experiment conducted to evaluate a battery’s waterproof performance. To address this challenge, Guangzhou Yuexin has provided a comprehensive solution. We have specially designed a reliable testing system capable of performing high‑intensity, high‑temperature rain‑spray tests. This well‑designed solution complies with international standards and is primarily used to assess the physical and other relevant properties of vehicles—including passenger cars, buses, tractors, motorcycles—and their components under conditions simulating high‑pressure or steam‑jet cleaning processes.

IPX9K Rain Test Procedure – Reference Diagram

Project Overview

Batteries, depending on their protection rating, typically undergo tests such as IP67, IP68, and IPX9K (IPX69K). Among these, IPX9K represents the highest level of ingress protection. The test procedure employs a fan‑shaped nozzle in accordance with GBT 4208‑2017, subjecting small‑sized enclosures to spraying at a flow rate of (15 ± 1) L/min for 30 seconds in each direction, with a rotation speed of (5 ± 1) r/min, at angles of 0°, 30°, 60°, and 90°. For larger enclosures, testing is conducted under intended operating conditions, with water sprayed from a distance of (175 ± 25) mm.

Solution Value

The IPX9K battery rain‑exposure test is one of the key methods for evaluating a battery’s waterproof performance. It simulates the impact of powerful water jets under extreme weather conditions, enabling assessment of whether internal components may be compromised by water ingress, leading to short circuits or failure. This test is of great importance for quality control throughout battery manufacturing and use, helping to enhance both waterproofing and safety while providing battery manufacturers with more reliable assurance of product quality. Consequently, the value of the IPX9K battery rain‑exposure test cannot be overlooked; it has become an indispensable testing standard in the battery industry.

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