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As the power supply device of new energy vehicles, car batteries will not only leak electricity but also pose a threat to the safety of the car if it does not meet waterproof requirements.As the core energy source of new energy vehicles, the battery can provide driving power for the entire vehicle. In order to protect the internal components of the battery pack from erosion by dust, rain, etc., the air tightness index of the battery must reach a certain dustproof and waterproof level.When power battery manufacturers produce them, they generally carry out precise designs with strong waterproof properties. The commonly used sealing shell materials mainly include: rubber sealing rings, sealants, foam tapes, etc.But no matter which material is used, it is also very important to test the battery for waterproofing.

As an expert in the field of waterproof testing, Hirays has done a lot of research on waterproof testing in the field of new energy vehicles.This time we will share the waterproof testing cases of new energy vehicle batteries and power batteries, hoping to be helpful to you.

1. Waterproof testing requirements for new energy vehicle batteries and power batteries

The sealing of new energy vehicle batteries needs to match the battery pack box structure and sealing rings. The upper and lower parts of the battery box need to be laser spliced ​​to achieve overall sealing, which is structural sealing.In addition, the battery will also use sealing aids such as sealing rings or sealants to help form a more sealed structure.

This battery is larger in size and highly precise.Battery packs generally have waterproof vents. During testing, compressed gas can be filled into the waterproof vents for testing. This direct detection method can ensure that no secondary damage is caused to the battery, and the detection results are more accurate.

two, new energy vehicles, power battery waterproof detection problem is not in place

Due to the large size of new energy vehicle batteries, it is impossible to use a fully sealed waterproof testing method for batteries during testing, and it is also prone to inaccurate testing results. Therefore, we must first get rid of the following testing problems during testing:

1. The sealing glue between the upper cover and the bottom tank cracks, resulting in poor sealing, which can easily lead to the penetration of external liquid and pollute the battery working environment.

2. Safety valve leakage due to sealing problems may cause damage to other parts.

3. Insufficient sealing causes acid leakage at the terminals, which affects the electric wires of the battery car and causes the circuit to burn out.

4. Failure to seal will lead to loss of capacity and reduced battery life and safety.

three, new energy vehicles, power battery waterproof testing process display

Since the size of the new energy vehicle battery pack is too large, it is not suitable for fully enclosed testing. Therefore, Hirays Technology adopts direct detection. The instrument has an air inlet pipe specially designed to transport the detection gas. During the inspection, the air inlet pipe is connected to the connecting pipe of the new energy vehicle battery pack. This kind of inspection is convenient and fast;

In addition, when the equipment detects, a certain volume of dry and impurity-free gas will be filled into the cavity of the battery pack, and then the compressed air supply will be cut off, and the pressure will be stabilized for a period of time. After a set measurement time, small changes in the air pressure in the detection environment will be monitored.The sensor transmits this information to the detection system, and finally through a series of calculations, the gas leakage value can be obtained. Based on the leakage value, the waterproof performance and IP waterproof level of the battery pack can be detected.

After setting up the program, the Hirays air tightness detector can perform automatic inflation, automatic voltage stabilization, and automatic testing. After the test is completed, whether the product is a good product or a defective product will be intuitively displayed on our instrument.The detection process is highly efficient and the operation is simple and convenient.

three, Advantages of Hirays Air Tightness Detector

▲Introduction to system features and functions

High precision

Powerful 32-bit processor and 24-bit A/D converter, plus patented"Intelligent pressure difference&"Algorithm, test accuracy is equivalent to differential pressure type.Compared with the differential pressure type, the testable leakage range is larger, which is basically equal to the test range.

AI algorithm

The automatic learning function can identify the characteristic information of the sample to be tested, analyze the valid data of the sample information, automatically judge and identify the critical point of the leakage volume, and obtain the optimal process time parameters through the analysis of the critical value, which greatly improves the difficulty of getting started with the instrument for the first time.

Powerful testing capabilities

The system comes with 2 pressure forms and 8 basic judgment methods, which can be combined into more than 20 test functions to easily cope with various working conditions and meet your various requirements!

Stable, reliable, improve efficiency

Built-in self-developed patented technology,"IVT&"Pneumatic sealing valve island" greatly improves the test accuracy and speeds up the inflation speed. At the same time, large leaks have been detected during the inflation stage, saving the entire test time.

The testing process is simple and more versatile

There is no need for standard parts, no need to make two sets of jigs, no need to compare with standard parts, and elimination of deformation errors after multiple tests of standard parts.

More scalable

Modular design allows one host to control an execution module composed of multiple full-function valve islands according to requirements.Achieve full-featured multi-channel testing including positive and negative pressure, indirect testing