Battery explosion-proof valve single breathing jig

Abstract

This utility model discloses a single-unit breathing fixture for a battery explosion-proof valve. The fixture includes a lower cavity and an upper cavity. The upper cavity is mounted above the lower cavity, and a breathing test device can be connected to the lower part of the lower cavity. The bottom surface of the lower cavity has an air inlet for connecting to the helium tube of the breathing test device, and the center of the top surface has a recessed groove communicating with the air inlet. The recessed groove has a stepped surface for placing the explosion-proof valve plate. The bottom surface of the upper cavity has an upper recessed groove, and the bottom surface of the upper recess has a protruding contoured step that contacts the outer ring of the top surface of the explosion-proof valve plate. A vent hole communicating with the upper recessed groove is also provided on the side of the upper cavity. This single-unit breathing fixture for a battery explosion-proof valve significantly improves testing efficiency, safety, and the immediacy of data feedback, ensuring the consistency and reliability of the explosion-proof valve's performance.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and in particular to a battery explosion-proof valve single-cell breathing fixture. Background Technology

[0002] With the rapid development of new energy vehicles and the energy storage industry, the safety of lithium-ion batteries, as the core energy carrier, is of paramount importance. Battery explosion-proof valves (also known as pressure relief valves or safety valves) are the last line of defense in battery safety design. Their core function is to reliably and promptly release pressure at a precisely set pressure threshold (burst pressure) when the internal pressure of the battery abnormally rises due to thermal runaway, overcharging, or other reasons, thereby preventing a violent battery explosion. Therefore, the burst pressure value of the explosion-proof valve is one of its most critical performance indicators. Conducting burst pressure testing on each or every batch of explosion-proof valves during the manufacturing process is an essential step to ensure that their quality meets design requirements and safety standards.

[0003] The mainstream explosion-proof valve burst testing technology generally monitors production stability by measuring the burst value of individual valves during production. This allows the measurement process to be moved forward, improving the response speed. However, since a large amount of verification data is needed to deduce the reasonable range of burst values ​​before implementing individual burst monitoring, it affects the testing efficiency, safety, and the immediacy of data feedback, severely restricting production efficiency and real-time quality monitoring capabilities. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a single-unit breathing fixture for battery explosion-proof valves. This fixture enables pre-monitoring of the breathing and burst values ​​during the production of the explosion-proof valve, eliminating the need for welding the valve to a cover plate before breathing and bursting. This shortens testing time and reduces waste from welding the cover plate. The stability of production can be reflected through the explosion-proof valve itself, improving testing efficiency, safety, and the immediacy of data feedback.

[0005] According to one aspect of the present invention, a battery explosion-proof valve single-unit breathing fixture is provided, comprising a lower cavity and an upper cavity, wherein the upper cavity is installed above the lower cavity, and a breathing test device can be connected to the lower part of the lower cavity; The bottom surface of the lower cavity is provided with an air inlet for connecting to the helium tube of the breathing test equipment, and the center of the top surface is provided with a lower groove that communicates with the air inlet. The lower groove is provided with a stepped surface, which is used to place the explosion-proof valve plate. The bottom surface of the upper cavity is provided with an upper groove, and the bottom surface of the upper groove is provided with a protruding contoured step, which can contact the outer ring of the top surface of the explosion-proof valve plate. A vent hole connected to the upper groove is also provided on the side of the upper cavity.

[0006] In some embodiments, the upper surface of the lower cavity is provided with an venting groove that runs through its front and rear sides. This is advantageous because the venting groove allows for venting during mold closing with the upper cavity.

[0007] In some embodiments, the lower cavity, the upper cavity, and the respiratory testing device are connected by two locating pins. The advantage of this is that it describes the positioning and connection method of the lower cavity, the upper cavity, and the respiratory testing device.

[0008] In some embodiments, two through-holes are provided on each side of the lower cavity, and two through-holes are provided on each side of the upper cavity. Two positioning pins pass through the two lower positioning holes and the two upper positioning holes, respectively. The advantage is that it further describes the specific related structure for positioning and connecting the lower cavity and the upper cavity using positioning pins.

[0009] In some embodiments, the lower cavity and the upper cavity are connected by four connecting pins. The advantage of this is that it describes a method for fixing the lower cavity and the upper cavity together.

[0010] In some embodiments, four through-holes are provided at each corner of the lower cavity, and four through-holes are provided at each corner of the upper cavity. Four connecting pins are respectively installed in the four lower connecting holes and the four upper connecting holes. The advantage is that it further describes the specific related structure for connecting the lower cavity and the upper cavity using connecting pins. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a battery explosion-proof valve single-cell breathing fixture according to one embodiment of the present invention; Figure 2 for Figure 1 The diagram shows an exploded structure of a battery explosion-proof valve single-cell breathing fixture. Figure 3 for Figure 1 The diagram shows a cross-sectional structure of a battery explosion-proof valve single-cell breathing fixture. Figure 4 for Figure 1 The diagram shows the structure of the lower cavity. Figure 5 for Figure 1 The diagram shows the structure of the upper cavity.

[0012] In the diagram: lower cavity 1, upper cavity 2, explosion-proof valve plate 3, positioning pin 4, connecting pin 5, air inlet 11, lower groove 12, stepped surface 13, exhaust groove 14, lower positioning hole 15, lower connecting hole 16, upper groove 21, contoured step 22, vent hole 23, upper positioning hole 24, upper connecting hole 25. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings.

[0014] like Figure 1-5 As shown, the fixture mainly includes a lower cavity 1 and an upper cavity 2. The upper cavity 2 is installed above the lower cavity 1, and a breathing test device can be connected to the lower part of the lower cavity 1.

[0015] The bottom surface of the lower cavity 1 is provided with an air inlet 11, which is used to connect to the helium tube of the breathing test equipment. The center of the top surface of the lower cavity 1 is provided with a lower groove 12, which is connected to the air inlet 11. The lower groove 12 is provided with a stepped surface 13, which can be used to place the explosion-proof valve plate 3 to be tested. During the test, the stepped surface 13 contacts the lower surface of the explosion-proof valve plate 3 and is sealed by pressure.

[0016] Preferably, an exhaust groove 14 is provided on the upper surface of the lower cavity 1, which runs through its front and rear sides, and can be used to exhaust air when it is molded with the upper cavity 2.

[0017] The bottom surface of the upper cavity 2 is provided with an upper groove 21, and the bottom surface of the upper groove 21 has a ring of protruding contoured steps 22. During testing, the contoured steps 22 contact the outer ring of the top surface of the explosion-proof valve plate 3, and the explosion-proof valve plate 3 can be sealed by applying pressure to the upper cavity 2 to press it into contact with the lower cavity 1.

[0018] In addition, a vent 23 is provided on the side of the upper cavity 2, which is connected to the upper groove 21. During the test, air enters through the vent 23 according to the test conditions, forming the inhalation and exhalation test requirements with the lower cavity 1.

[0019] Preferably, two vertically penetrating lower positioning holes 15 are provided on both sides of the lower cavity 1, and two vertically penetrating upper positioning holes 24 are provided on both sides of the upper cavity 2. The two lower positioning holes 15 and the two upper positioning holes 24 are respectively penetrated by two positioning pins 4, and the bottom of the two positioning pins 4 are connected to the breathing test device, thereby connecting and positioning the upper cavity 2, the lower cavity 1 and the breathing test device.

[0020] Preferably, four through-holes 16 are provided at each corner of the lower cavity 1, and four through-holes 25 are provided at each corner of the upper and lower cavities 1. Four connecting pins 5 are respectively installed in each of the lower connecting holes 16 and each of the upper connecting holes 25, thereby further fixing the upper cavity 2 and the lower cavity 1 together.

[0021] The lower cavity 1 and the upper cavity 2 are made of mold steel or stainless steel that has been processed and heat-treated. The positioning pin 4 and the connecting pin 5 are both made of stainless steel.

[0022] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A breathing fixture for a battery explosion-proof valve unit, characterized in that: It includes a lower cavity (1) and an upper cavity (2), the upper cavity (2) being installed above the lower cavity (1), and a breathing test device being able to be connected to the lower cavity (1); The bottom surface of the lower cavity (1) is provided with an air inlet (11) for connecting with the helium tube of the breathing test device, and the center of the top surface is provided with a lower groove (12) connected to the air inlet (11). The lower groove (12) is provided with a stepped surface (13), which is used to place the explosion-proof valve plate (3). The bottom surface of the upper cavity (2) is provided with an upper groove (21), and the bottom surface of the upper groove (21) is provided with a ring of protruding contoured steps (22). The contoured steps (22) can contact the outer ring of the top surface of the explosion-proof valve plate (3). A vent hole (23) connected to the upper groove (21) is also provided on the side of the upper cavity (2).

2. The battery explosion-proof valve single-unit breathing fixture according to claim 1, characterized in that: The upper surface of the lower cavity (1) is provided with an exhaust groove (14) that runs through its front and rear sides.

3. The battery explosion-proof valve single-cell breathing fixture according to claim 1, characterized in that: The lower cavity (1), the upper cavity (2), and the respiratory testing device are connected by two positioning pins (4).

4. The battery explosion-proof valve single-unit breathing fixture according to claim 3, characterized in that: The lower cavity (1) has two through-holes (15) on both sides, and the upper cavity (2) has two through-holes (24) on both sides. The two positioning pins (4) pass through the two lower positioning holes (15) and the two upper positioning holes (24) respectively.

5. A battery explosion-proof valve single-cell breathing fixture according to claim 1, characterized in that: The lower cavity (1) and the upper cavity (2) are connected by four connecting pins (5).

6. A battery explosion-proof valve single-unit breathing fixture according to claim 5, characterized in that: The lower cavity (1) is provided with four through-holes (16) at each corner, and the upper cavity (2) is provided with four through-holes (25) at each corner. The four connecting pins (5) are respectively installed in the four lower connecting holes (16) and the four upper connecting holes (25).

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