阅读说明：本技术 一种具有泄压功能的高低温湿热试验箱及其试验方法 (High-low temperature damp-heat test box with pressure relief function and test method thereof ) 是由 马军 傅钊 林文表 侯卫国 郑昆 于 2020-12-04 设计创作，主要内容包括：本发明公开了一种具有泄压功能的高低温湿热试验箱,包括箱体,箱体的顶板上设有上下贯穿整个顶板的泄压口,泄压口内设置有泄压板,所述泄压板包括网板以及设置于该网板的内表面上并覆盖该内表面的铝箔。此外,所述试验箱还包括防凝露板,防凝露板的一端设置于箱体的内壁上,其另一端向着箱体的内部延伸至泄压口的下方。本发明还公开了一种利用所述试验箱对样品进行试验的方法。在试验过程中,箱内气压瞬间升高并超过一定阈值时,泄压板上的铝箔能瞬间破裂以快速释放瞬间增大的气压,从而有效防止例如箱体爆炸等情况的发生。而且,所述防凝露板能有效地收集试验过程中产生的凝露,而硅橡胶发热丝则能防止凝露的产生,确保试验的正常进行。(The invention discloses a high-low temperature damp-heat test box with a pressure relief function, which comprises a box body, wherein a pressure relief opening penetrating through the whole top plate up and down is formed in the top plate of the box body, a pressure relief plate is arranged in the pressure relief opening, and the pressure relief plate comprises a screen plate and an aluminum foil arranged on the inner surface of the screen plate and covering the inner surface. In addition, the proof box still includes prevents the condensation board, prevents that the one end of condensation board sets up on the inner wall of box, and its other end extends to the below of pressure release mouth towards the inside of box. The invention also discloses a method for testing a sample by using the test box. In the test process, when the air pressure in the box rises instantly and exceeds a certain threshold value, the aluminum foil on the pressure relief plate can be broken instantly to quickly release the instantly increased air pressure, so that the conditions such as explosion of the box body and the like are effectively prevented. Moreover, the anti-condensation plate can effectively collect condensation generated in the test process, and the silicone rubber heating wire can prevent the condensation from being generated, so that the normal operation of the test is ensured.)

1. The utility model provides a high low temperature damp and hot test box with pressure release function, includes the box, its characterized in that: the pressure relief device is characterized in that a pressure relief opening penetrating through the whole top plate up and down is formed in the top plate of the box body, a pressure relief plate is arranged in the pressure relief opening and comprises a screen plate and an aluminum foil arranged on the inner surface of the screen plate and covering the inner surface.

2. The high-low temperature damp-heat test chamber according to claim 1, wherein: the pressure relief plate is arranged at the bottom of the pressure relief opening, a pressure relief space between the upper surface of the pressure relief plate and the upper edge of the pressure relief opening is filled with a heat insulation material, and an aluminum foil or an aluminum plate is sealed with the box body above the heat insulation material.

3. The high-low temperature damp-heat test chamber according to claim 2, wherein: the heat insulation material is heat insulation cotton wrapped by aluminum foil.

4. The high-low temperature damp-heat test chamber according to claim 1, wherein: the high-low temperature damp-heat test box further comprises an anti-condensation plate, one end of the anti-condensation plate is arranged on the inner wall of the box body, and the other end of the anti-condensation plate extends to the lower portion of the pressure relief opening towards the inside of the box body.

5. The high-low temperature damp-heat test chamber according to claim 4, wherein: the other end of the anti-condensation plate extends to the lower part of the pressure relief opening towards the interior of the box body and exceeds the position of 5-10 mm of the joint of the pressure relief plate and the box body.

6. The high-low temperature damp-heat test chamber according to claim 1, wherein: the high-low temperature damp-heat test box further comprises a splash-proof rod positioned above the pressure relief plate.

7. The high-low temperature damp-heat test chamber according to claim 6, wherein: the high-low temperature damp-heat test box further comprises a mesh enclosure which is located above the splash guard and can cover the pressure relief opening.

8. The high and low temperature thermal humidity test chamber according to any one of claims 1 to 7, wherein: the area of the pressure relief opening is 70-90% of the area of the top plate of the box body.

9. The high and low temperature thermal humidity test chamber according to any one of claims 1 to 7, wherein: a silicon rubber heating wire is arranged on the side wall of the pressure relief plate and/or the pressure relief opening; and the high-low temperature damp-heat test box also comprises an automatic control module for controlling the automatic operation of each component.

10. A method of testing a sample using the high and low temperature humid heat test chamber according to any one of claims 1 to 9, wherein: the method comprises the following steps:

s1: placing a sample to be tested into a high-low temperature damp-heat test box for testing;

s2: when the pressure in the box body is greater than the threshold value, the pressure relief action is started immediately to break the aluminum foil on the pressure relief plate so as to release the gas pressure in the box body; and if the pressure in the box body is within the threshold range, the test is continued to be normally carried out until the test is finished.

Technical Field

The invention relates to test equipment, in particular to a high-low temperature damp-heat test box with a non-reclosing pressure relief function, and further relates to a test method of the high-low temperature damp-heat test box with the non-reclosing pressure relief function.

Background

At present, lithium batteries are widely applied to various industries such as mobile phones, electric motorcycles, electric automobiles and the like, and along with gradual expansion of application range and continuous improvement of requirements, the energy density in a unit space of the battery is enhanced, the quantity and the quality of the battery are remarkably increased, and the probability of battery safety accidents is increased. Therefore, the safety problem in the application process of the lithium battery is increasingly emphasized, and before the lithium battery is put into use formally, the safety of the lithium battery needs to be evaluated and tested.

High and low temperature tests, which are one way to test the performance of lithium batteries, need to be performed in a high and low temperature humid and thermal test chamber. In the testing process, because the lithium cell has the possibility of burning, even explosion under high low temperature environment, and the poisonous and harmful gas who releases thereupon then can make the incasement gas pressure rise in the twinkling of an eye, and the atmospheric pressure balanced window of current wet hot case can't release the excessive atmospheric pressure of increase in the twinkling of an eye fast, and then leads to damaging the condition emergence of wet hot case because the incasement pressure is too high.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a high-low temperature damp-heat test box capable of quickly releasing the pressure in the box when the pressure in the box is increased. In addition, the invention also aims to provide a test method of the high-low temperature damp-heat test chamber with the pressure relief function.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a high low temperature damp and hot test box with pressure release function, includes the box, be equipped with the pressure release mouth that runs through whole roof from top to bottom on the roof of box, be provided with the pressure release board in the pressure release mouth, the pressure release board includes the otter board and sets up on the internal surface of this otter board and covers the aluminium foil of this internal surface.

Wherein: the pressure relief plate is arranged at the bottom of the pressure relief opening, a pressure relief space between the upper surface of the pressure relief plate and the upper edge of the pressure relief opening is filled with a heat insulation material, and an aluminum foil or an aluminum plate is sealed with the box body above the heat insulation material.

Further: the heat insulation material is heat insulation cotton wrapped by aluminum foil.

In some embodiments of the invention: the high-low temperature damp-heat test box further comprises an anti-condensation plate, one end of the anti-condensation plate is arranged on the inner wall of the box body, and the other end of the anti-condensation plate extends to the lower portion of the pressure relief opening towards the inside of the box body.

Wherein: the other end of the anti-condensation plate extends to the lower part of the pressure relief opening towards the interior of the box body and exceeds the position of 5-10 mm of the joint of the pressure relief plate and the box body.

In some embodiments of the invention: the high-low temperature damp-heat test box further comprises a splash-proof rod positioned above the pressure relief plate.

In some embodiments of the invention: the high-low temperature damp-heat test box further comprises a mesh enclosure which is located above the splash guard and can cover the pressure relief opening.

Preferably: the area of the pressure relief opening is 70-90% of the area of the top plate of the box body.

Preferably: and a silicon rubber heating wire is arranged on the side wall of the pressure relief plate and/or the pressure relief opening.

Further: the high-low temperature damp-heat test box also comprises an automatic control module used for controlling automatic operation of each component.

Another object of the present invention is a method for testing a sample by using the high and low temperature humid heat test chamber as described above, comprising the steps of:

s1: placing a sample to be tested into a high-low temperature damp-heat test box for testing;

s2: when the pressure in the box body is greater than the threshold value, the pressure relief action is started immediately to break the aluminum foil on the pressure relief plate so as to release the gas pressure in the box body; and if the pressure in the box body is within the threshold range, the test is continued to be normally carried out until the test is finished.

According to the high-low temperature damp-heat test chamber, the pressure relief plate is arranged, so that when the air pressure in the chamber rises instantly and exceeds a certain threshold (usually 103kPa) in the test process, the aluminum foil on the pressure relief plate can be broken instantly to release the instantly increased air pressure quickly, and the conditions such as explosion of the chamber body are effectively prevented. Compared with the spring weight type pressure relief device commonly used at present, the pressure relief plate disclosed by the invention belongs to a non-reclosing type pressure relief mode, and the pressure of a spring does not need to be adjusted like a spring weight type pressure relief structure when the pressure relief plate is used, so that the structure is simpler, and the applicability is stronger. In addition, the high-low temperature damp-heat test box is also provided with a condensation preventing plate, which can effectively collect condensation generated in the test process and ensure the normal operation of the test.

Drawings

FIG. 1 is a schematic structural diagram of a high-low temperature damp-heat test chamber according to the present invention;

FIG. 2 is a schematic diagram of the construction of the vent plate of the present invention; and

fig. 3 shows a partial schematic structure of the pressure relief opening according to the invention.

Detailed Description

As shown in fig. 1, the high-low temperature damp-heat test chamber according to the present invention includes a chamber body 1, a pressure relief opening 11 penetrating through the entire top plate up and down is provided on the top plate of the chamber body 1, preferably at the center thereof, a pressure relief plate 2 is provided in the pressure relief opening 11, preferably at the bottom of the pressure relief opening, and is detachably mounted on the inner edge of the pressure relief opening 11 by screws, etc., and the connection between the pressure relief plate 2 and the pressure relief opening 11 is sealed by using, for example, foamed silicone rubber, etc.

As shown in fig. 2, the pressure relief plate 2 includes a mesh plate 21 and an aluminum foil 22 disposed on and covering an inner surface of the mesh plate 21, so that when the pressure in the tank 1 reaches a predetermined value, the pressure relief plate 2 starts to be activated, and at this time, the aluminum foil 22 on the pressure relief plate 2 is ruptured to release the gas pressure in the tank 1, thereby functioning to protect the tank 1. In addition, a limit switch (not shown) may be further disposed at the pressure relief opening 11, and when the pressure relief opening 11 is in an open state, the limit switch sends a pressure relief signal. In order to facilitate timely pressure relief when the battery explodes, in the invention, the area of the pressure relief opening 11 should be as large as possible, and preferably accounts for 70-90% of the area of the top plate of the box body 1. In addition, the screen 21 of the pressure relief plate 2 is preferably smaller than the top plate of the box body 1, and is preferably a stainless steel screen with a thickness of 1mm-4 mm. Furthermore, since the thickness of the pressure relief plate 2 is smaller than that of the top plate, when the pressure relief plate is installed in the pressure relief opening 11, as shown in fig. 3, the pressure relief space between the upper surface of the pressure relief plate 2 and the upper edge of the pressure relief opening 11 is filled with a heat insulating material 7, and the heat insulating material 7 is heat insulating cotton wrapped with aluminum foil; the upper part of the heat insulation material is sealed by an aluminum foil 6 or an aluminum plate. If necessary, a silicon rubber heating wire 8 can be arranged on the inner side wall of the pressure relief plate 2 and/or the pressure relief opening 11, and the output quantity of the heating wire is adjusted according to test requirements, so that the surface temperature of the pressure relief plate 2 is increased to be above the dew point temperature, and condensation is prevented.

Particularly, in order to improve the anti-condensation effect of the test box in the using process, in the invention, the high-low temperature damp-heat test box further comprises an anti-condensation plate 3, and the anti-condensation plate is opened at a position corresponding to the pressure relief opening 11 to give way, namely, one end of the anti-condensation plate 3 is arranged on the inner wall of the box body 1, and the other end of the anti-condensation plate 3 extends to the lower part of the pressure relief opening 11 in a direction parallel to the pressure relief opening 11 towards the inside of the box body 1 and properly exceeds the joint of the pressure relief plate 2 and the box body 1 by 5mm-10mm, so that condensation generated by the pressure relief opening 11 and the joint thereof can be collected on the anti-condensation plate 3 without affecting the pressure relief process.

Further, the pressure relief assembly may further comprise a splash bar 4 positioned above the pressure relief plate 2 so as to block the pressure relief plate 2 from being flushed out by the airflow during the pressure relief action. Furthermore, the pressure relief assembly may further include a net cover 5 located above the splash guard 4 and covering the pressure relief opening 11 to prevent the pressure relief plate 2, the heat insulation cotton, etc. from flying out of the box body 1 to hurt the operator or other indoor instruments and equipment during the pressure relief operation. In addition, the high-low temperature damp-heat test box also comprises an automatic control module for controlling automatic operation of each part.

The invention also provides a test method of the high-low temperature damp-heat test chamber, which comprises the following steps:

s1: putting a sample to be tested, such as a lithium battery, into a high-low temperature damp-heat test box to prepare for testing;

s2: when the pressure in the box body 1 is larger than a threshold value (usually about 103kPa), the pressure relief action is started immediately, and at the moment, the aluminum foil 22 on the pressure relief plate 2 is broken, so that the aim of releasing the gas pressure in the box body 1 is fulfilled; if the pressure in the box body 1 is within the threshold value range, the test is continued normally until the test is finished.

The present invention has been described in detail with reference to the preferred embodiments. However, variations and additions to the embodiments will become apparent to those of ordinary skill in the art upon a reading of the foregoing description. It is the intention of the applicants that all such variations and additions fall within the scope of the claims. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Any modification and improvement of this product, and the substitution and use of the same or similar substances within the scope or range of patents, shall fall within the scope of protection of this invention.