Respiratory fatigue testing device

Abstract

The utility model discloses a respiratory fatigue testing device. The respiratory fatigue testing device comprises a lower template and an upper template which is correspondingly and hermetically matched with the lower template, a through window is arranged between the lower mold plate and the upper mold plate, a profiling shell in sealing fit with the lower mold plate is detachably arranged at the bottom of the lower mold plate, the profiling shell is provided with a shell inner cavity, the window is communicated with the shell inner cavity, and the profiling shell is provided with an air inlet communicated with the shell inner cavity. According to the utility model, the explosion-proof valve can be accurately simulated to be tested in the assembling environment of the battery shell, and the accuracy of the respiratory fatigue test is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and in particular relates to a respiratory fatigue testing device. Background Art

[0002] The power battery pack of new energy vehicles is composed of multiple modules, including battery top cover, aluminum shell, battery cell, explosion-proof valve, bursting disc, etc. Among them, the explosion-proof valve component is a key component related to the safety and reliability of the entire life cycle of lithium batteries. Therefore, how to systematically verify and evaluate the fatigue performance of the explosion-proof valve throughout its life cycle is a key factor that needs further exploration.

[0003] The breathing cycle tester is a device used to test the functionality and life of new energy power batteries. It mainly performs fatigue resistance tests on batteries, also known as cycle life tests. The breathing cycle tester simulates the actual conditions of power batteries in use by controlling the bidirectional air pressure, thereby accurately reflecting the true performance characteristics of the bursting disc, and testing whether the bursting disc can withstand multiple cycle changes under a certain pressure to evaluate the performance and stability of the battery.

[0004] The breathing test of existing battery cells requires that the cover plate and the aluminum shell be assembled by laser welding to form weld spots at the mouth of the aluminum shell and the edge of the cover plate, and the corresponding breathing detection tooling be matched. When the lithium battery is tested for breathing fatigue, the welds around the mouth of the aluminum shell will fail and leak first due to breathing fatigue, making it impossible to accurately evaluate the true fatigue resistance of the explosion-proof valve. Utility Model Content

[0005] The purpose of the utility model is to solve the above technical problems and provide a breathing fatigue test device, so as to accurately simulate the explosion-proof valve in the assembly environment of the battery shell to test and improve the accuracy of the breathing fatigue test. In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A respiratory fatigue testing device comprises a lower template and an upper template corresponding to the lower template and sealed therewith; a through window is arranged between the lower template and the upper template, a contoured shell is detachably arranged at the bottom of the lower template and sealed therewith, the contoured shell has a shell inner cavity, the window is arranged in communication with the shell inner cavity, and the contoured shell is provided with an air inlet connected to the shell inner cavity.

[0007] Specifically, a seal is provided between the lower template and the upper template at a circumferential edge of the window.

[0008] Specifically, at least one sealing member is provided between the lower template and the upper template at the circumferential outer edge of the window.

[0009] Specifically, the sealing member is arranged on the lower template and / or the upper template.

[0010] Specifically, a battery cover is positioned between the lower template and the upper template, an explosion-proof valve is installed in the battery cover, and the explosion-proof valve is located inside the window.

[0011] Specifically, the sealing member is arranged at a circumferential position of the battery cover plate.

[0012] Specifically, the sealing member abuts against the circumferential edge of the battery cover.

[0013] Specifically, the contoured shell includes a shell and an opening of a mouth adapter arranged at the top opening of the shell; and a shell inner cavity communicating with the opening is arranged inside the shell.

[0014] Specifically, a mouth transfer platform is arranged around the top opening of the shell, the mouth transfer platform is arranged vertically relative to the side wall of the shell, and the side edge of the lower template is arranged flush with the side edge of the mouth transfer platform.

[0015] Specifically, a plurality of mounting holes are arranged in the mouth adapter, and a plurality of corresponding connecting holes are arranged on the lower template and the upper template. The plurality of connecting holes correspond to the plurality of mounting holes and are connected through a plurality of mounting parts.

[0016] Compared with the prior art, the beneficial effects of the respiratory fatigue test device of the utility model are mainly reflected in:

[0017] By setting the inner cavity of the contoured shell to be connected with the windows in the lower template and the upper template, the assembly space of the battery cover is effectively simulated, and the inner cavity of the shell is connected to an external gas source to detect the actual breathing fatigue performance of the explosion-proof valve in the battery cover, so as to obtain the data of the breathing fatigue test accurately and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a respiratory fatigue testing device provided in an embodiment of the present application;

[0019] Figure 2 A schematic front view of a respiratory fatigue testing device provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of the structure of a battery cover provided in an embodiment of the present application;

[0021] Figure 4 A schematic diagram of the structure of the lower template provided in the embodiment of the present application;

[0022] Figure 5 A schematic structural diagram of a contoured housing provided in an embodiment of the present application.

[0023] Reference numerals:

[0024] Lower template 1, connecting hole 11, mounting part 12;

[0025] Upper template 2;

[0026] Window 3, seal 31;

[0027] Contour housing 4, housing inner cavity 41, air inlet 42, housing 43, mouth adapter 44, mounting hole 45;

[0028] Battery cover 5, explosion-proof valve 51. DETAILED DESCRIPTION

[0029] In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0030] Embodiment 1

[0031] This embodiment provides a breathing fatigue test device for testing the fatigue resistance of the explosion-proof valve 51. The explosion-proof valve 51 is installed on the battery cover 5, and the battery cover 5 is positioned in the breathing fatigue test device to simulate the test environment of the battery cover 5 in a real assembly space state, and the battery cover 5 is subjected to multiple pressure cycle tests in the space to detect the fatigue resistance of the explosion-proof valve 51 in the battery cover 5, and evaluate the performance and stability of the explosion-proof valve 51 installed on the overall battery.

[0032] Figure 1 This is a schematic diagram of the structure of the respiratory fatigue testing device provided in Example 1 of the present application. Figure 2 This is a front view schematic diagram of the respiratory fatigue testing device provided in Example 1 of the present application. Figure 3 This is a schematic diagram of the structure of the battery cover provided in Example 1 of the present application. Figure 4 This is a schematic diagram of the structure of the lower template provided in Example 1 of the present application. Figure 5 This is a schematic structural diagram of the contoured housing provided in Example 1 of the present application.

[0033] like Figure 1-Figure 5 As shown, this embodiment provides a respiratory fatigue testing device, including a lower template 1 and an upper template 2 sealed and matched with the lower template 1; a through window 3 is arranged between the lower template 1 and the upper template 2, and a contoured shell 4 sealed and matched therewith is detachably arranged at the bottom of the lower template 1, the contoured shell 4 has a shell inner cavity 41, the window 3 is connected to the shell inner cavity 41, and the contoured shell 4 is provided with an air inlet 42 connected to the shell inner cavity 41.

[0034] A seal is provided between the lower template 1 and the upper template 2 at the circumferential edge of the window 3; at least one seal 31 is provided between the lower template 1 and the upper template 2 at the circumferential outer edge of the window 3, specifically one seal 31 is provided on the lower template 1 or the upper template 2; or, two seals 31 are provided on the lower template 1 and the upper template 2 respectively, and when the lower template 1 and the upper template 2 are molded together, the two seals 31 abut against each other or the two seals 31 are offset and spaced from each other, thereby ensuring the mold sealing performance of the lower template 1 and the upper template 2.

[0035] The battery cover 5 is positioned between the lower template 1 and the upper template 2, and an explosion-proof valve 51 is installed in the battery cover 5, and the explosion-proof valve 51 is located inside the window 3; the battery cover 5 is positioned between the lower template 1 and the upper template 2, and the seal 31 is arranged on the circumference of the battery cover 5, and the seal 31 abuts against the circumferential edge of the battery cover 5, thereby sealing the circumferential position of the battery cover 5, ensuring that the battery cover 5 is in a sealed state between the lower template 1 and the upper template 2.

[0036] The air inlet 42 is externally connected to an air pressure control device (not shown in the figure), which provides an air source for the air inlet 42. The air pressure control device sets the air pressure to be less than 1Mpa, performs multiple breathing cycle tests on the explosion-proof valve 51, tests the number of failure cycles of the explosion-proof valve 51, and determines the fatigue resistance of the explosion-proof valve 51.

[0037] The contoured shell 4 provided in this embodiment can realistically simulate the assembly space of the battery cover 5. The shell inner cavity 41 of the contoured shell 4 is filled with a winding core to simulate the internal space of the lithium battery. The contoured shell 4 is inflated and deflated, and the inflation pressure is adjusted to perform a breathing fatigue test on the explosion-proof valve 51.

[0038] In this embodiment, the shell cavity 41 of the contoured shell 4 is connected to the windows 3 in the lower template 1 and the upper template 2, so as to effectively simulate the assembly space of the battery cover 5, connect the shell cavity 41 to an external air source, and then detect the real breathing fatigue performance of the explosion-proof valve 51, so that the data of the breathing fatigue test is accurate and efficient.

[0039] Embodiment 2

[0040] This embodiment optimizes the respiratory fatigue test device on the basis of the above embodiment, especially provides a specific implementation method of the contoured housing:

[0041] The contoured housing 4 comprises a shell 43 and an opening adapter 44 disposed at the top opening of the shell 43 ; a shell inner cavity 41 communicating with the opening is disposed inside the shell 43 .

[0042] Figure 1 This is a schematic diagram of the structure of the respiratory fatigue testing device provided in Example 2 of the present application. Figure 5This is a schematic structural diagram of the contoured housing provided in Example 2 of the present application.

[0043] like Figure 1 , Figure 5 As shown, in this embodiment, the housing 43 is a rectangular parallelepiped structure, and an air inlet 42 is provided at the lower part of a side wall of the housing 43. An opening of the top of the housing 43 is provided with an opening adapter 44 in the circumference, and the opening adapter 44 is arranged perpendicularly to the side wall of the housing 43. A plurality of mounting holes 45 are provided in the opening adapter 44, and the plurality of mounting holes 45 are arranged at intervals around the opening adapter 44 in the circumference.

[0044] In this embodiment, the lower template 1 and the upper template 2 are both long plate structures, and the size of the lower template 1 is the same as the size of the mouth transfer platform 44. The upper template 2 or the lower template 1 includes a group of long sides arranged opposite to each other and another group of short sides arranged opposite to each other. The lower template 1 is detachably connected to the mouth transfer platform 44, and the side edges of the lower template 1 are flush with the side edges of the mouth transfer platform 44.

[0045] The lower template 1 and the upper template 2 are provided with a number of corresponding connecting holes 11, and the connecting holes 11 are arranged one by one with the mounting holes 45, and are connected through a number of mounting parts 12. In this embodiment, the mounting part 12 is a tightening knob, and the assembly and disassembly of the lower template 1, the upper template 2 and the contour shell 4 are realized by disassembling the mounting part 12. There are six mounting parts 12, among which four mounting parts 12 are respectively arranged at the four vertex positions of the upper template 2 and the lower template 1, and two mounting parts 12 are respectively arranged at a group of long side positions of the upper template 2 and the lower template 1, which play a role in stabilizing the connection. According to the actual size of the upper template 2 and the lower template 1, the number of mounting parts 12 can be selectively set. The upper template 2, the lower template 1, and the contour shell 4 are easy to assemble and disassemble and are efficient, and can adapt to and position different types of battery cover plates 5, and then replace and test different types of explosion-proof valves 51, and the test is efficient.

[0046] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0050] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A respiratory fatigue test device, characterized in that: It includes a lower template and an upper template corresponding to the lower template and sealingly matched with the lower template; a through window is arranged between the lower template and the upper template, and a contoured shell that seals and matches with the lower template is detachably arranged at the bottom of the lower template, the contoured shell has a shell inner cavity, the window is connected to the shell inner cavity, and the contoured shell is provided with an air inlet connected to the shell inner cavity.

2. The respiratory fatigue testing device according to claim 1, characterized in that: A seal is provided between the lower template and the upper template at a circumferential edge of the window.

3. The respiratory fatigue testing device according to claim 1, characterized in that: At least one sealing member is disposed between the lower template and the upper template at the circumferential outer edge of the window.

4. The respiratory fatigue testing device according to claim 3, characterized in that: The sealing member is arranged on the lower template and / or the upper template.

5. The respiratory fatigue testing device according to claim 3, characterized in that: A battery cover is positioned between the lower template and the upper template, an explosion-proof valve is installed in the battery cover, and the explosion-proof valve is located inside the window.

6. The respiratory fatigue testing device according to claim 5, characterized in that: The sealing member is arranged at a circumferential position of the battery cover plate.

7. The respiratory fatigue testing device according to claim 6, characterized in that: The sealing member abuts against the peripheral edge of the battery cover.

8. The respiratory fatigue testing device according to claim 1, characterized in that: The contoured shell comprises a shell and an opening of a mouth adapter arranged at the top opening of the shell; the interior of the shell is provided with the shell inner cavity communicating with the opening.

9. The respiratory fatigue testing device according to claim 8, characterized in that: A mouth transfer platform is arranged around the top opening of the shell, the mouth transfer platform is arranged vertically relative to the side wall of the shell, and the side edge of the lower template is arranged flush with the side edge of the mouth transfer platform.

10. The respiratory fatigue testing device according to claim 8, characterized in that: The mouth adapter is provided with a plurality of mounting holes, the lower template and the upper template are provided with a plurality of corresponding connecting holes, the plurality of connecting holes are provided in a one-to-one correspondence with the plurality of mounting holes, and are connected through a plurality of mounting parts.

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