Battery cap airtightness detection mechanism

Abstract

The utility model discloses a battery cap airtightness detection mechanism, including upper pressure plate, upper pressure head, pressure head spring, detection seat, detection seal ring, the upper pressure head activity cover is placed in the air jet cavity of upper pressure plate, and the both ends of pressure head spring are respectively abutted on air jet cavity top surface and upper pressure head, and be equipped with detection cavity and detection gas path in the detection seat, and the inner end of detection gas path is continuous with detection cavity, and the outer end of detection gas path is connected with gas source, and detection seal ring is installed in detection cavity. When detecting, upper pressure head is pressed to the battery cap under the drive of pressure head spring, and upper pressure head and battery cap are the elastic contact, can automatically adapt the thickness difference of battery cap, avoid the defect that the sealing pressure of thickness thin battery cap is insufficient, in addition, the detection seal ring of the utility model is double ring or multiring, has reduced the sealing compression ratio, has improved the resilience speed of seal ring, and the service life of detection seal ring is long.

Description

Technical Field

[0001] This utility model relates to a lithium battery testing device, and more particularly to a battery cap airtightness testing mechanism. Background Technology

[0002] The battery cap is an important component of a battery, providing a sealed function and acting as a safety valve. A battery cap typically consists of a top cover, a safety valve, and a bottom cover. After assembly, the battery cap's seal must be tested. Figure 1 As shown, an existing battery cap airtightness testing mechanism includes an upper pressure plate 1', a testing seat 2', and a testing sealing ring 3'. The battery cap 100 is placed inside the testing cavity of the testing seat 2 and on the top surface of the testing sealing ring 3'. The upper pressure plate 1' presses down and pushes against the battery cap 100, making the battery cap 100 fit tightly against the testing sealing ring 3'. Then, helium gas is injected into the jet chamber 11' of the upper pressure plate 1' to test the airtightness of the battery cap 100. The testing sealing ring 3' of this existing battery cap airtightness testing mechanism uses an O-ring, which has the defects of a large compression ratio and slow rebound speed. Moreover, the O-ring is easily damaged and cannot adapt to battery caps 100 with certain thickness deviations. Utility Model Content

[0003] The purpose of this invention is to provide a battery cap airtightness testing mechanism with good adaptability and long service life.

[0004] To achieve the above objectives, the technical solution of this utility model is:

[0005] This utility model is a battery cap airtightness testing mechanism, including an upper pressure plate, an upper pressure head, a pressure head spring, a testing seat, and a testing sealing ring;

[0006] The upper pressure plate has a jet chamber, and the upper pressure head is movably sleeved in the jet chamber of the upper pressure plate. The pressure head spring is set in the jet chamber, and the two ends of the pressure head spring abut against the top surface of the jet chamber and the upper pressure head, respectively. The detection seat is set directly below the upper pressure plate, and the bottom surface of the upper pressure plate abuts against the top surface of the detection seat. The detection seat has a detection chamber and a detection air passage. The inner end of the detection air passage is connected to the detection chamber, and the outer end of the detection air passage is connected to an external air source. The detection sealing ring is installed in the detection chamber.

[0007] The top of the upper pressure head has a mounting platform that can abut against the protrusion inside the upper pressure plate's jet chamber.

[0008] The detection sealing ring is a disc-shaped component with two or more raised edges around its periphery and a vent hole in its center. This vent hole is opposite to the inner end of the detection air passage on the detection seat so that gas can flow through.

[0009] This utility model also includes an outer sealing ring; the outer sealing ring is an O-ring, which is installed in a circular groove on the top surface of the detection seat, and the circular groove surrounds the detection cavity.

[0010] After adopting the above solution, since this utility model includes an upper pressure plate, an upper pressure head, a pressure head spring, a detection seat, and a detection sealing ring; during detection, the upper pressure head presses against the battery cap under the drive of the pressure head spring, and the upper pressure head and the battery cap are in elastic contact, which can automatically adapt to the thickness difference of the battery cap and avoid the defect of insufficient sealing pressure of the battery cap with a thinner thickness; in addition, the detection sealing ring used in this utility model is a double or multi-ring, and the sealing performance is improved by manufacturing a low pressure difference sealing layer. The thickness of this detection sealing ring is much larger than that of the O-ring, which reduces the sealing compression ratio, improves the rebound speed of the sealing ring, and has a long service life.

[0011] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of an existing battery cap airtightness testing mechanism;

[0013] Figure 2 This is a three-dimensional sectional view of the present invention;

[0014] Figure 3 This is a cross-sectional view of the present invention. Detailed Implementation

[0015] like Figure 2 , Figure 3 As shown, this utility model is a battery cap airtightness testing mechanism, including an upper pressure plate 1, an upper pressure head 2, a pressure head spring 3, a testing seat 4, a testing sealing ring 5, and an outer sealing ring 6.

[0016] The upper pressure plate 1 is provided with a jet chamber 11. The upper pressure head 2 is movably sleeved in the jet chamber 11 of the upper pressure plate 1. The pressure head spring 3 is provided in the jet chamber 11 and the two ends of the pressure head spring 3 abut against the top surface of the jet chamber 11 and the upper pressure head 2, respectively. The detection seat 4 is provided directly below the upper pressure plate 2 and the bottom surface of the upper pressure plate 2 abuts against the top surface of the detection seat 4. The detection seat 4 is provided with a detection chamber 41 and a detection air passage 42. The inner end of the detection air passage 42 is connected to the detection chamber 41. The outer end of the detection air passage 41 is connected to an external air source. The detection sealing ring 5 is installed in the detection chamber 41. The outer sealing ring 6 is installed in the circular groove 43 on the top surface of the detection seat 4. The circular groove 43 surrounds the detection chamber 41.

[0017] The top of the upper pressure head 2 has a mounting platform 21, which can abut against the protruding edge 12 inside the jet chamber 11 of the upper pressure plate 1.

[0018] The detection sealing ring 5 is a disc-shaped component with two or more raised edges 51 around its periphery and a vent 52 in its middle. The vent 52 is opposite to the inner end of the detection air passage 42 on the detection seat 4 so that gas can flow through.

[0019] The outer sealing ring 6 is an O-ring.

[0020] The working principle of this utility model:

[0021] During testing, the battery cap 100 is placed in the testing chamber 41 of the testing seat 4 and positioned on the top surface of the testing sealing ring 5. The upper pressure head 2 is driven by the pressure head spring 3 to press against the battery cap 100, so that the battery cap 100 is pressed onto the testing sealing ring 5. The upper pressure head 2 and the battery cap 100 are in elastic contact. Then, helium gas is injected into the jet chamber 11 of the upper pressure plate 1 to perform a sealing test on the battery cap 100.

[0022] The above description is merely a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the specification of the present utility model should still fall within the scope of the patent of the present utility model.

Claims

1. A battery cap airtightness testing mechanism, characterized in that: Includes upper pressure plate, upper pressure head, pressure head spring, detection seat, and detection sealing ring; The upper pressure plate has a jet chamber, and the upper pressure head is movably fitted inside the jet chamber of the upper pressure plate. The pressure head spring is set inside the jet chamber, and the two ends of the pressure head spring abut against the top surface of the jet chamber and the upper pressure head, respectively. The detection seat is set directly below the upper pressure plate, and the bottom surface of the upper pressure plate abuts against the top surface of the detection seat. The detection seat has a detection chamber and a detection air passage. The inner end of the detection air passage is connected to the detection chamber, and the outer end of the detection air passage is connected to an external air source. The detection sealing ring is installed inside the detection chamber. The detection sealing ring is a disc-shaped component with two or more raised edges around its periphery and a vent hole in its middle. This vent hole is opposite to the inner end of the detection air passage on the detection seat to allow gas to flow through.

2. The battery cap airtightness detection mechanism according to claim 1, characterized in that: The top of the upper pressure head has a mounting platform that can abut against the protrusion inside the upper pressure plate's jet chamber.

3. The battery cap airtightness detection mechanism according to claim 1, characterized in that: It also includes an outer sealing ring; the outer sealing ring is an O-ring, which is installed in a circular groove on the top surface of the detection seat, and the circular groove surrounds the detection cavity.

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