Structure and method for detecting air impermeability of battery bag case

An air-tightness detection and battery pack technology, which is applied in liquid/vacuum measurement for liquid-tightness, and by measuring the acceleration and deceleration rates of fluids, etc., can solve problems such as threats to the personal safety, danger, and loss of drivers and passengers. Achieve the effect of low implementation difficulty, strong adaptability, simple structure and detection method

Inactive Publication Date: 2015-12-09
BRILLIANCE AUTO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to prevent dust and water from entering the battery pack and causing a short circuit, caus

Method used

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  • Structure and method for detecting air impermeability of battery bag case

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Depend on figure 1 As shown, there is a battery pack in the figure, and a connector connected to the inside of the battery pack is fixedly arranged on the outer casing of the battery pack. For the battery pack of the switch joint, the other end of the connector is connected to a ball valve, a pressure reducing valve and a high-pressure air source in turn, and a pressure gauge is also connected to the connector.

[0019] The charging connector on the battery pack, the high-voltage output connector, and the low-voltage connector are charging connectors with protective plugs, high-voltage output connectors, and low-voltage connectors.

[0020] The parameters of the experiment setting:

[0021] Pressure in the box (relative pressure)

50mbar for 1 minute state of charge SOC Keep it as it is temperature

25℃

[0022] The present invention needs to measure and calculate the parameter:

[0023] Pressure inside the battery pack (t...

Embodiment 2

[0035] 2. Carry out experiments on the battery packs that have been installed on the car. The parameters set in the experiment and the parameters that need to be measured and calculated are the same as those in the embodiment, so they are omitted; Testing can also carry experimental equipment to the scene for testing. The detection process is as follows:

[0036] a) Pull out the high-voltage output plug, low-voltage plug, charging plug and manual maintenance switch plug, and use the protection plug for protection to ensure that the battery pack is in a non-working state;

[0037] b) if figure 1 Connect the experimental equipment as shown, and connect the experimental equipment to the box;

[0038] c) Adjust the pressure reducing valve to control the air pressure input into the battery pack box to be stable at 50mbar;

[0039] d) When the pressure gauge shows 50mbar, close the ball valve, cut off the connection between the high-pressure gas source and the battery pack box, a...

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PUM

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Abstract

The invention relates to a structure for detecting the air impermeability of a battery bag case. The structure comprises a battery bag and is characterized in that a connector is fixedly arranged on the housing of the battery bag and is communicated with the interior of the battery bag; the battery bag is provided with a charging connector, a high-voltage output connector, a low-voltage connector, and a manual repairing switch connector; the other end of the connector is successively connected with a ball valve, a reducing valve, and a high-pressure gas source; and the connector is communicated with a pressure meter. The structure is simple and a detecting method is simple. A detecting process is low in implementing difficulty and good in adaptability. The structure and the method may detect the air impermeability at any place so long as the temperature is constant in a test process. Different parameters are set when temperature changes.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle power battery protection, and in particular relates to a structure and method for detecting the airtightness of a battery pack case for detecting the ability of the battery pack shell to protect internal batteries. technical background [0002] As the domestic air smog continues to worsen and the world's oil energy is increasingly tense, electric vehicles and hybrid vehicles have become key development projects for domestic and foreign automakers. As new energy vehicles, their market value and technical content are the highest , wherein the power battery provides energy for the electric vehicle, and the motor provides power for the electric vehicle to ensure the normal driving of the vehicle. In order to ensure that the battery pack can supply power safely, the power battery pack must have strong dustproof and waterproof capabilities. In order to avoid dust and water entering the battery...

Claims

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Application Information

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IPC IPC(8): G01M3/32
Inventor 刘开平郭宏飞潘成久隋涛高力单红艳
Owner BRILLIANCE AUTO
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