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Case airtightness evaluation method and evaluation device

An evaluation method and technology for evaluating devices, which are used in fluid tightness testing, measuring devices, and liquid tightness measurement using liquid/vacuum degree, etc., and can solve problems such as deformation of the upper casing

Pending Publication Date: 2021-07-27
TOYOTA JIDOSHA KK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, for example, when the upper case of the above-mentioned case is made of resin, the upper case deforms due to pressurization or decompression of the air in the case.
The deformation of the upper case also continues due to creep in the measurement of the above-mentioned pressure change, so there is a problem that the internal volume of the case changes and the air leakage (airtightness) of the case cannot be accurately evaluated.

Method used

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  • Case airtightness evaluation method and evaluation device
  • Case airtightness evaluation method and evaluation device
  • Case airtightness evaluation method and evaluation device

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Embodiment Construction

[0030] In the following, Figure 1 ~ 7 Evaluation of the airtightness of the present embodiment of the present disclosure relates to the device housing 10 (hereinafter, simply referred to as "evaluation device 10") will be described.

[0031] like figure 1 , The evaluation device 10 includes a leak checker 12, the control device 34, and a plurality (here, three) displacement sensors 38A, 38B, 38C. The evaluation means 10 for carrying out the evaluation method of the present embodiment airtight present disclosure relates to the housing (hereinafter, "evaluation method" for short) means. In the present embodiment, the evaluation apparatus 10 used to evaluate the figure 1 Airtightness of the battery pack shown in FIG. 50 of the housing 52.

[0032] The above-described battery pack 50 is mounted under the floor of a vehicle (not shown) of the vehicle, so that the supply of power to the electric motor vehicle to travel. In the battery pack 50, the contents of the housing 52 has a flat a...

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Abstract

A case airtightness evaluation method evaluates airtightness of a case mounted at a vehicle. A pressure measuring step of the evaluation method includes pressurizing or depressurizing air in the case, allowing pressure in the case to stabilize, and then measuring a pressure change in the case. During the measurement of the pressure change, a deformation amount acquiring step acquires a deformation amount of a specific location of the case. Based on the acquired deformation amount, a correcting step corrects the measured pressure change. Based on the corrected pressure change, an evaluating step evaluates airtightness of the case.

Description

Technical field [0001] The present disclosure (the present disclosure) relates to a method and apparatus for air-tightness evaluation housing mounted on a vehicle such as a vehicle. Background technique [0002] In Japanese Laid-Open Patent Publication No. 2018-073785 discloses a vehicle mounted with a battery pack. In this battery pack, housed in the interior of the housing as a high voltage battery cells. Upper housing and the lower housing and configured housing assembly, a substantially rectangular parallelepiped shape. [0003] In the battery pack described above, there is a case in order to check the water resistance of the air leak test housing. In the leak test, e.g., after the air inside the casing pressure or reduced pressure within the housing and stable, measuring the pressure changes in the housing, whereby the determination (evaluation) of air leakage from the case. [0004] However, for example in the case of the upper case of the housing made of resin, due to air ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/32
CPCG01M3/3272H01M2200/20H01M50/24H01M50/22Y02E60/10G01M3/36H01M50/569G01M3/3263
Inventor 田丸晃士
Owner TOYOTA JIDOSHA KK