A test fixture for a lithium battery explosion vent
By designing a highly compatible lithium battery explosion-proof valve test fixture, the problem of existing devices being unable to accommodate multiple sizes and shapes was solved, achieving a test solution that is quick to change, easy to maintain, and low-cost.
Patent Information
- Application Number
- CN202521569063.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-25
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-07-25
AI Technical Summary
Existing lithium battery explosion-proof test fixtures have a simple structure and cannot be compatible with multiple sizes and shapes, resulting in high production costs, long replacement times, poor maintainability, and the inability to test cylindrical and square batteries simultaneously.
Design a fixture that includes a test base mold, an explosion-proof valve test module, an auxiliary test block, and an upper test mold. Connect a pressurization pump through an air channel and air pipe to achieve compatibility testing of cylindrical and square cover plate structures. Employ a detachable auxiliary test block and sealing ring structure to ensure airtightness and reliability.
The test fixture features rapid changeover, high compatibility, easy maintenance, and low cost. It can simultaneously measure both circular and square explosion-proof sheets, solving the compatibility and efficiency issues of existing devices and reducing production costs.
Smart Images
Figure CN224681937U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of lithium battery testing equipment, specifically relating to a lithium battery explosion-proof valve testing fixture. Background Technology
[0002] The explosion-proof valve for lithium batteries is a crucial safety component, playing a key role in ensuring the safe operation of the battery. Its function is to rupture in time when the internal pressure reaches a certain threshold, releasing gas, reducing the internal pressure, and preventing battery expansion and rupture. Currently, in existing technologies, the explosion-proof valve is assembled to the cover plate via laser welding. During the laser welding process, the material structure of the explosion-proof valve changes due to heat, affecting its performance. Generally, specific tooling or fixtures are used to perform burst or breathing tests on the explosion-proof valve before and after assembly. However, the tooling design is only for specific models or specifications of lithium battery explosion-proof valves and cannot accommodate explosion-proof valves of various sizes, shapes, or structures, or before and after assembly. When different specifications and models of explosion-proof valves need to be produced, the tooling must be redesigned and manufactured, increasing production costs and time costs. In other words, existing technologies suffer from problems such as a simple device structure, poor maintainability, long fixture replacement time, and incompatibility with cylindrical and prismatic battery testing. Therefore, it is essential to provide a lithium battery explosion-proof valve test fixture that is structurally sound, quick to change, highly efficient, highly compatible, easy to maintain, and low-cost. Summary of the Invention
[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a lithium battery explosion-proof valve test fixture that is structurally reasonable, quick to change, highly efficient, highly compatible, easy to maintain, and low in cost.
[0004] The purpose of this utility model is achieved as follows: a lithium battery explosion-proof valve test fixture, comprising a test base mold and an upper test mold, wherein the test base mold is mounted on a base plate, an explosion-proof valve test module is mounted on the upper surface of the test base mold, an auxiliary test block is detachably mounted in the middle of the explosion-proof valve test module, and the explosion-proof valve test module and the auxiliary test block are located between the test base mold and the upper test mold; the test base mold has air channels on both right-angled sides, and the upper test mold has a cross-shaped structure with air channels on both symmetrical sides, and the air channels are independent of each other; through the test base mold, the explosion-proof valve test module, the auxiliary test block, the upper test mold, and the corresponding air channels, the explosion and breathing tests of cylindrical and square cover structures, and explosion-proof plates before and after assembly, can be achieved.
[0005] The test mold is fixedly connected to the base plate by internal angle bolts. Each of the four corners of the base plate is provided with a bushing, and a bearing is movably installed inside each bushing. The top of the bearing is fixedly connected to the upper pressure plate.
[0006] Specifically, the power component drives the upper pressure plate to move, which in turn drives the upper test mold to move, thereby realizing the displacement and clamping function of the mechanism. This utility model device has two independent air channels that can be connected to a pressurization pump through corresponding air pipes, and can perform explosion and breathing tests compatible with cylindrical and square cover plate structures and explosion-proof discs before and after assembly. In actual use, the power component can be a cylinder, telescopic rod, or other mechanisms or equipment that can achieve the corresponding linear drive action.
[0007] A set of circular sealing rings is provided in the middle of the upper surface of the test mold, and pins are provided at the four corners of the upper surface of the test mold. The test mold is fixedly connected to the bottom surface of the explosion-proof valve test module by the pins.
[0008] Specifically, the connection between the test mold and the explosion-proof valve test module is achieved by using pins, and the circular sealing ring ensures airtightness during burst tests or breathing tests, thus guaranteeing the accuracy and reliability of the test data.
[0009] The explosion-proof valve test module has "L"-shaped fixing blocks at each of the four corners of its upper surface. The fixing blocks are installed on the upper surface of the explosion-proof valve test module by auxiliary block bolts. The upper surface of the explosion-proof valve test module has a groove in the middle that matches the auxiliary test block. A square sealing ring is installed inside the groove, and a rubber stopper is installed in the middle of the square sealing ring.
[0010] Specifically, the "L"-shaped fixing blocks are positioned at the four corners of the upper surface of the explosion-proof valve test module, effectively preventing interference with the "+"-shaped upper test mold. The "L"-shaped fixing blocks at the four corners can reliably position the explosion-proof disc during burst or breathing tests, especially for square cover explosion-proof discs, allowing them to better match the square explosion-proof disc placement area. The grooves not only match the installation of auxiliary test blocks but also facilitate the installation of circular cover plates, enabling circular cover explosion-proof discs to better match the circular explosion-proof disc placement area, thus ensuring effective and reliable burst or breathing tests.
[0011] The auxiliary test block has a square sealing ring on its upper surface. The auxiliary test block is located between the explosion-proof valve test module and the upper test module, and the auxiliary test block is engaged with the groove.
[0012] The upper test mold has pins on both the left and right sides of its lower surface. The upper test mold is connected to the explosion-proof valve test module through the pins. A square sealing ring is provided in the middle of the lower surface of the upper test mold, and a rubber plug is provided in the middle of the square sealing ring. The upper surface of the upper test mold is fixedly connected to the upper pressure plate through upper bolts.
[0013] Air valve blocks are installed on the air passages on the right-angled sides of the test bottom mold and on the air passages on the symmetrical sides of the upper test mold.
[0014] The air passage on one side of the test bottom mold and the corresponding air passage on the upper test mold form a circular test air passage, and the air passage on the other side of the test bottom mold and the air passage on the other side of the upper test mold form a square test air passage.
[0015] The circular test airway includes a first air pipe and a second air pipe, which are connected to a first regulating air valve and a first pressurizing pump; the square test airway includes a third air pipe and a fourth air pipe, which are connected to a second regulating air valve and a second pressurizing pump.
[0016] The upper surface of the auxiliary test block is provided with a square explosion-proof disc placement area and a circular explosion-proof disc placement area, respectively.
[0017] The beneficial effects of this utility model are as follows: This utility model is a lithium battery explosion-proof valve testing fixture. In use, the clamping device of this utility model has the advantages of being freely retractable, small in size, space-saving, easy to maintain, and capable of rapid model changeover. It can be widely used in lithium battery explosion-proof valve burst clamping devices. This utility model features a rapid model changeover solution, high efficiency, and can simultaneously measure round and square explosion-proof sheets (unassembled). It has high compatibility, a simple structure, low debugging difficulty, easy maintenance, and low cost. Furthermore, it enables rapid model changeover with low difficulty. This utility model effectively solves the problems of existing clamping devices, such as simple structure, inability to measure multiple product models, high cost, low efficiency, and time consumption. This utility model has the advantages of reasonable structure, rapid model changeover, high efficiency, high compatibility, easy maintenance, and low cost. Attached Figure Description
[0018] Figure 1 This is a front view of the overall assembly of this utility model.
[0019] Figure 2 This is an exploded view of the present invention.
[0020] Figure 3 This is an exploded view of the upper test mold of this utility model.
[0021] Figure 4 This is an exploded view for auxiliary testing of this utility model.
[0022] Figure 5 This is an exploded view of the explosion-proof valve testing module of this utility model.
[0023] Figure 6 This is an exploded view of the test base mold of this utility model.
[0024] Figure 7 This is a schematic diagram of the movement direction of this utility model.
[0025] Figure 8 This utility model Figure 1 Explosion test diagram in the middle BB direction.
[0026] Figure 9 This utility model Figure 1 Breathing test diagram in the middle BB direction.
[0027] Figure 10 This is a schematic diagram of the single explosion-proof disc explosion of this utility model.
[0028] Figure 11 This is a schematic diagram of the explosion-proof disc of the cylindrical cover plate of this utility model.
[0029] Figure 12 This is a schematic diagram of the explosion-proof sheet of the square cover plate of this utility model.
[0030] In the diagram: 1. Test base mold; 2. Explosion-proof valve test module; 3. Auxiliary test block; 4. Rubber plug; 5. Pin; 6. Upper test mold; 7. Square sealing ring; 8. Circular sealing ring; 9. Fixing block; 10. Auxiliary block bolt; 19. Upper pressure plate; 20. Bearing; 21. Base plate; 22. Bushing; 23. Upper bolt; 24. Inner corner bolt; 25. Air valve block A; First air pipe B; Second air pipe C; Third air pipe D; Fourth air pipe E; First regulating air valve F; Second regulating air valve G; First pressurizing pump H; Second pressurizing pump X; Circular test air passage Y; Square test air passage J; Square explosion-proof disc placement area K; Circular explosion-proof disc placement area. Detailed Implementation
[0031] The present invention will be further described below with reference to the accompanying drawings. Example 1
[0032] like Figure 1-12 As shown, a lithium battery explosion-proof valve test fixture includes a test base mold 1 and an upper test mold 6. The test base mold 1 is mounted on a base plate 21. An explosion-proof valve test module 2 is mounted on the upper surface of the test base mold 1. An auxiliary test block 3 is detachably mounted in the middle of the explosion-proof valve test module 2. The explosion-proof valve test module 2 and the auxiliary test block 3 are located between the test base mold 1 and the upper test mold 6. The test base mold 1 has independent air channels on its two right-angled sides. The upper test mold 6 has a cross-shaped structure and independent air channels on its two symmetrical sides. The test base mold 1, the explosion-proof valve test module 2, the auxiliary test block 3, the upper test mold 6, and the corresponding air channels enable explosion and breathing tests on cylindrical and square cover structures, as well as explosion-proof plates before and after assembly.
[0033] The test mold 1 is fixedly connected to the base plate 21 by internal angle bolts 24. Each of the four corners of the base plate 21 is provided with a bushing 22, and a bearing 20 is movably installed inside each bushing 22. The top of the bearing 20 is fixedly connected to the upper pressure plate 19.
[0034] A set of circular sealing rings 8 are provided in the middle of the upper surface of the test mold 1, and pins 5 are provided at the four corners of the upper surface of the test mold 1. The test mold 1 is fixedly connected to the bottom surface of the explosion-proof valve test module 2 through the pins 5.
[0035] The explosion-proof valve test module 2 has "L"-shaped fixing blocks 9 at each of the four corners of its upper surface. The fixing blocks 9 are installed on the upper surface of the explosion-proof valve test module 2 by auxiliary block bolts 10. The upper surface of the explosion-proof valve test module 2 has a groove in the middle that matches the auxiliary test block 3. A square sealing ring 7 is provided inside the groove, and a rubber stopper 4 is provided in the middle of the square sealing ring 7.
[0036] In this embodiment, the explosion test of the circular explosion-proof valve (before assembly) is as follows: Figure 1 and 8 As shown in Figure -9: The valve block 25 on one side of the air passage of the test mold 1 is connected to the first regulating valve E of the first pressurizing pump G via the first air pipe A. The valve block on the same side of the air passage as the test mold is connected to the second air pipe B. The second air pipe B is not connected to the regulating valve and serves as an exhaust channel. Through a cylinder or other power component, it drives the upper pressure plate 19 to move. Thus, through the cooperation of the upper pressure plate 19, bearing 22, and bushing 20, the upper test mold 6 is lowered (in the direction shown). Figure 7 The motion clamps the auxiliary test block 3, the explosion-proof valve test module 2, and the test bottom mold 1. At this time, the rubber plug 4 clamps the explosion-proof valve. Then, the first pressurizing pump G pressurizes the test circular test air passage X through the first air pipe A until the explosion-proof plate is broken. At this time, the first pressurizing pump G reads the pressure peak and stops pressurizing, thus realizing the explosion test of the circular explosion-proof valve (before assembly).
[0037] The auxiliary test block 3 has a square sealing ring 7 on its upper surface. The auxiliary test block 3 is located between the explosion-proof valve test module 2 and the upper test mold 6, and the auxiliary test block 3 is engaged with the groove.
[0038] The upper test mold 6 has pins 5 on both the left and right sides of its lower surface. The upper test mold 6 is connected to the explosion-proof valve test module 2 through the pins 5. A square sealing ring 7 is provided in the middle of the lower surface of the upper test mold 6. A rubber plug 4 is provided in the middle of the square sealing ring 7. The upper surface of the upper test mold 6 is fixedly connected to the upper pressure plate 19 through upper bolts 23.
[0039] In this embodiment, the same test is performed on the square blast-resistant disc (before assembly), such as... Figure 1 and 8As shown in Figure -9: The air valve block 25 on one side of the test mold 1 is connected to the second regulating air valve F of the second pressurizing pump H via the third air pipe C. The air valve block on the other side of the test mold 1 is connected to the fourth air pipe D. The fourth air pipe D is not connected to the regulating air valve and serves as an exhaust channel. Through a cylinder or other power component, it drives the upper pressure plate 19 to move. Thus, through the cooperation of the upper pressure plate 19, bearing 22, and bushing 20, the upper test mold 6 is lowered (in the direction shown). Figure 7 The auxiliary test block 3 and the test base mold 1 are pressed together. The explosion-proof valve is pressed together by the square sealing ring 7. Then, the second pressurizing pump H is used to pressurize the square test air passage through the third air pipe C until the explosion-proof plate is broken. At this time, the second pressurizing pump H reads the pressure peak and stops pressurizing, thus realizing the explosion test of the circular explosion-proof valve (before assembly).
[0040] This utility model relates to a lithium battery explosion-proof valve testing fixture. In use, the clamping device of this utility model has advantages such as free retraction and extension, small size, space-saving design, easy maintenance, and rapid model changeover. It can be widely used in lithium battery explosion-proof valve burst clamping devices. This utility model features a rapid model changeover solution, high efficiency, and can simultaneously measure both round and square explosion-proof sheets (unassembled). It has high compatibility, a simple structure, low debugging difficulty, easy maintenance, and low cost. Furthermore, it allows for rapid model changeover with low difficulty. This utility model effectively solves the problems of existing clamping devices, such as simple structure, inability to measure multiple product models, high cost, low efficiency, and time consumption. This utility model has the advantages of reasonable structure, rapid model changeover, high efficiency, high compatibility, easy maintenance, and low cost. Example 2
[0041] like Figure 1-12 As shown, a lithium battery explosion-proof valve test fixture includes a test base mold 1 and an upper test mold 6. The test base mold 1 is mounted on a base plate 21. An explosion-proof valve test module 2 is mounted on the upper surface of the test base mold 1. An auxiliary test block 3 is detachably mounted in the middle of the explosion-proof valve test module 2. The explosion-proof valve test module 2 and the auxiliary test block 3 are located between the test base mold 1 and the upper test mold 6. The test base mold 1 has independent air channels on its two right-angled sides. The upper test mold 6 has a cross-shaped structure and independent air channels on its two symmetrical sides. The test base mold 1, the explosion-proof valve test module 2, the auxiliary test block 3, the upper test mold 6, and the corresponding air channels enable explosion and breathing tests on cylindrical and square cover structures, as well as explosion-proof plates before and after assembly.
[0042] Air valve blocks 25 are installed on the air passages on the right-angled sides of the test bottom mold 1 and on the air passages on the symmetrical sides of the upper test mold 6.
[0043] The air passage on one side of the test mold 1 and the corresponding air passage on the upper test mold 6 form a circular test air passage X, and the air passage on the other side of the test mold 1 and the air passage on the other side of the upper test mold 6 form a square test air passage Y.
[0044] In this embodiment, a breathing test is performed on the circular explosion-proof valve (before assembly). Figure 1 and 8 As shown in Figure -9: The air valve block 25 on one side air passage of the test mold 1 is connected to the first regulating air valve E of the first pressurizing pump G via the first air pipe A. The air valve block on the same side air passage as the test mold is connected to the second air pipe B. The second air pipe B is not connected to the regulating air valve and serves as an exhaust channel. Through the cylinder or other power components, the upper pressure plate 19 is driven to move. Thus, through the cooperation of the upper pressure plate 19, bearing 22, and bushing 20, the upper test mold 6 is lowered (direction as shown in Figure 9). Figure 7 The motion clamps the auxiliary test block 3 and the test bottom mold 1, and the explosion-proof valve is clamped by the rubber plug 4. The first pressurizing pump G and the second pressurizing pump H alternately pressurize the air valve block 25 of the upper test mold 6 and the test bottom mold 1 (the air valve is automatically controlled by adjustment) to test the fatigue resistance of the explosion-proof sheet.
[0045] The circular test airway X includes a first air tube A and a second air tube B, which are connected to a first regulating air valve E and a first pressurizing pump G; the square test airway Y includes a third air tube C and a fourth air tube D, which are connected to a second regulating air valve F and a second pressurizing pump H.
[0046] In this embodiment, a breathing test is performed on the square blast protection disc (before assembly). Figure 1 and 8 As shown in Figure -9: The air valve block 25 on one side of the test mold 1 is connected to the second regulating air valve F of the second pressurizing pump H via the third air pipe C. The air valve block on the other side of the test mold 1 is connected to the fourth air pipe D. The fourth air pipe D is not connected to the regulating air valve and serves as an exhaust channel. Through a cylinder or other power component, it drives the upper pressure plate 19 to move. Thus, through the cooperation of the upper pressure plate 19, bearing 22, and bushing 20, the upper test mold 6 is lowered (in the direction shown). Figure 7 The motion-pressing auxiliary test block 3 and test bottom mold 1 are used to press the explosion-proof valve through the square sealing ring 7. Compressed air is alternately pressurized to the air valve block 25 of the upper test mold 6 and test bottom mold 1 through the third air pipe and the fourth air pipe (the air valve is automatically controlled by adjustment) to test the fatigue resistance of the explosion-proof sheet.
[0047] The upper surface of the auxiliary test block 3 is respectively provided with a square explosion-proof disc placement area J and a circular explosion-proof disc placement area K.
[0048] In this embodiment, the circular explosion-proof valve (after assembly): as follows Figure 11After manually removing the auxiliary test block 3, place the cylindrical cover plate directly into the groove of the explosion-proof valve test module 2, and place the circular explosion-proof valve (after assembly) in the corresponding circular explosion-proof plate placement area K, and then conduct the test. The burst test and breathing test are the same as above.
[0049] Square explosion-proof valve (after assembly): such as Figure 12 Place the square cover plate directly onto the auxiliary test block 3, and position it using the fixing block 9. Then, place the square explosion-proof valve (after assembly) in the corresponding square explosion-proof plate placement area J. Tighten the positioning fixing block 9 with the auxiliary block bolt 10 before conducting the test. The explosion test and breathing test are the same as above.
[0050] This utility model relates to a lithium battery explosion-proof valve testing fixture. In use, the clamping device of this utility model has advantages such as free retraction and extension, small size, space-saving design, easy maintenance, and rapid model changeover. It can be widely used in lithium battery explosion-proof valve burst clamping devices. This utility model features a rapid model changeover solution, high efficiency, and can simultaneously measure both round and square explosion-proof sheets (unassembled). It has high compatibility, a simple structure, low debugging difficulty, easy maintenance, and low cost. Furthermore, it allows for rapid model changeover with low difficulty. This utility model effectively solves the problems of existing clamping devices, such as simple structure, inability to measure multiple product models, high cost, low efficiency, and time consumption. This utility model has the advantages of reasonable structure, rapid model changeover, high efficiency, high compatibility, easy maintenance, and low cost.
Claims
1. A lithium battery explosion-proof valve test fixture, comprising a test base mold and an upper test mold, wherein the test base mold is mounted on a base plate, characterized in that: An explosion-proof valve test module is installed on the upper surface of the test mold. An auxiliary test block is detachably installed in the middle of the explosion-proof valve test module. The explosion-proof valve test module and the auxiliary test block are located between the test mold and the upper test mold. The test mold has independent air channels on its two right-angled sides. The upper test mold has a cross-shaped structure and independent air channels on its two symmetrical sides. The explosion and breathing tests of cylindrical and square cover structures, as well as explosion-proof plates before and after assembly, are achieved through the test mold, explosion-proof valve test module, auxiliary test block, upper test mold, and corresponding air channels.
2. The lithium battery explosion-proof valve test fixture according to claim 1, characterized in that: The test mold is fixedly connected to the base plate by internal angle bolts. Each of the four corners of the base plate is provided with a bushing, and a bearing is movably installed inside each bushing. The top of the bearing is fixedly connected to the upper pressure plate.
3. The lithium battery explosion-proof valve test fixture according to claim 2, characterized in that: A set of circular sealing rings is provided in the middle of the upper surface of the test mold, and pins are provided at the four corners of the upper surface of the test mold. The test mold is fixedly connected to the bottom surface of the explosion-proof valve test module by the pins.
4. A lithium battery explosion-proof valve test fixture according to claim 3, characterized in that: The explosion-proof valve test module has "L"-shaped fixing blocks at the four corners of its upper surface. The fixing blocks are installed on the upper surface of the explosion-proof valve test module by auxiliary block bolts. The upper surface of the explosion-proof valve test module has a groove in the middle that matches the auxiliary test block. A square sealing ring is installed inside the groove, and a rubber stopper is installed in the middle of the square sealing ring.
5. A lithium battery explosion-proof valve test fixture according to claim 4, characterized in that: The upper surface of the auxiliary test block is provided with a square sealing ring. The auxiliary test block is located between the explosion-proof valve test module and the upper test mold, and the auxiliary test block is engaged with the groove.
6. A lithium battery explosion-proof valve test fixture according to claim 5, characterized in that: The upper test mold has pins on both the left and right sides of its lower surface. The upper test mold is connected to the explosion-proof valve test module through the pins. A square sealing ring is provided in the middle of the lower surface of the upper test mold, and a rubber plug is provided in the middle of the square sealing ring. The upper surface of the upper test mold is fixedly connected to the upper pressure plate through upper bolts.
7. A lithium battery explosion-proof valve test fixture according to claim 6, characterized in that: Air valve blocks are installed on the air passages on the right-angled sides of the test bottom mold and on the air passages on the symmetrical sides of the upper test mold.
8. A lithium battery explosion-proof valve test fixture according to claim 7, characterized in that: The air passage on one side of the test bottom mold and the corresponding air passage on the upper test mold form a circular test air passage, and the air passage on the other side of the test bottom mold and the air passage on the other side of the upper test mold form a square test air passage.
9. A lithium battery explosion-proof valve test fixture according to claim 8, characterized in that: The circular test airway includes a first air pipe and a second air pipe, which are connected to a first regulating air valve and a first pressurizing pump; the square test airway includes a third air pipe and a fourth air pipe, which are connected to a second regulating air valve and a second pressurizing pump.
10. A lithium battery explosion-proof valve test fixture according to claim 5, characterized in that: The upper surface of the auxiliary test block is provided with a square explosion-proof disc placement area and a circular explosion-proof disc placement area, respectively.