Cover test device

Abstract

The application discloses a cover plate testing device, which comprises a lower die, an upper die and a sealing assembly. The top of the lower die is provided with a middle concave accommodating groove and a boss around the accommodating groove, the accommodating groove is used for accommodating a vertically placed cover plate structure, and the lower die is further provided with an air channel which is connected with the accommodating groove and an external gas supply device. The upper die is provided with a through hole at a position corresponding to the accommodating groove, so as to expose the polar column and the upper plastic of the cover plate structure after the die is closed. The sealing assembly is arranged at the bottom of the upper die, so as to seal the gap between the outer edge of the top cover sheet in the cover plate structure and the upper die and the lower die. The cover plate testing device can simultaneously test the air tightness of the battery cover plate structure and simulate the influence of the internal air pressure change of the battery on the top cover sheet, and the testing steps are simplified.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a cover plate testing device. Background Technology

[0002] In related technologies, the assembled cover plate structure undergoes a hydrostatic test to assess its sealing performance. Existing test structures use an upper mold and a lower mold with a sealing ring. The testing process involves placing the cover plate upside down on the lower mold, closing the molds so that the top cover plate is pressed against the sealing ring of the lower mold, and then venting air into the cavity of the lower mold. The presence of air bubbles confirms whether there is leakage, thus determining the cover plate's sealing performance. However, previous testing devices only assess sealing performance. When further testing the pressure resistance of the top cover plate is required, another set of testing tools is needed to ventilate and pressurize the top cover plate before testing its deformation. This process is cumbersome and time-consuming. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this application proposes a cover plate testing device that can simultaneously test the airtightness of the battery cover plate structure and simulate the impact of internal air pressure changes on the top cover plate, simplifying the testing steps.

[0004] The cover plate testing device according to an embodiment of the present invention includes: a lower mold, an upper mold, and a sealing assembly. The top of the lower mold has a recessed receiving groove in the middle and a boss on the outer periphery of the receiving groove. The receiving groove is used to receive a cover plate structure placed upright. The lower mold is also provided with an air passage that connects the receiving groove to an external gas supply device. The upper mold has a through hole at the position corresponding to the receiving groove to expose the pole post and upper plastic of the cover plate structure after the mold is closed. The sealing assembly is located at the bottom of the upper mold to seal the gap between the outer edge of the top cover plate in the cover plate structure and the upper and lower molds.

[0005] The cover plate testing device according to the present invention has at least the following beneficial effects: This cover plate testing device includes a lower mold, an upper mold, and a sealing component. In use, the cover plate structure is first placed upright in the receiving groove of the lower mold, and then the upper mold is pressed on the cover plate structure and the lower mold so that the sealing component at the bottom of the upper mold can seal the gap between the outer edge of the top cover and the upper and lower molds. After gas is introduced into the air passage of the lower mold, the gas enters the cover plate structure from below the top cover. It is observed whether there are bubbles coming out from the through hole of the upper mold. If there are bubbles, it proves that the cover plate structure is not airtight; otherwise, it is qualified. At the same time, the gas pressure is increased to a certain level, and then the flatness change of the top cover before and after the water pressure test is confirmed by the flatness testing device, thereby confirming the deformation of the top cover after the internal air pressure of the battery increases. Therefore, the cover plate testing device of this application can not only test the airtightness of the battery cover structure, but also simulate the influence of the internal air pressure change of the battery on the top cover, achieving two goals at once and simplifying the testing steps.

[0006] According to some embodiments of the present invention, the sealing assembly includes a first sealing ring and a second sealing ring. The first sealing ring is positioned closer to the center line of the upper mold through hole than the second sealing ring and is used to press the upper end face of the top cover plate. The second sealing ring is located between the bottom surface of the upper mold and the boss to seal the gap between the upper mold and the lower mold.

[0007] According to some embodiments of the present invention, the inner diameter of the boss is smaller than the outer diameter of the top cover plate, so that the outer edge of the top cover plate can be hung on the boss.

[0008] According to some embodiments of the present invention, a connecting component is also included, which is disposed between the upper mold and the lower mold and connects the upper mold and the lower mold.

[0009] According to some embodiments of this utility model, the connecting component is a locking member, the upper mold is provided with a through hole, the lower mold is provided with a threaded hole, and the locking member passes through the through hole and is threadedly connected to the threaded hole.

[0010] According to some embodiments of this utility model, the air passage is L-shaped, with its two ends penetrating the top and side of the lower mold, respectively.

[0011] According to some embodiments of the present invention, the two ends of the air passage are a first end and a second end, respectively. The first end penetrates the top of the lower mold and is located in the middle of the receiving groove. The first end is set at the bottom of the pole post.

[0012] According to some embodiments of this utility model, both the receiving groove and the through hole are circular.

[0013] According to some embodiments of this utility model, the upper and lower molds are rectangular in shape.

[0014] According to some embodiments of the present invention, the top of the upper mold is provided with a guide slope that transitions to the through hole.

[0015] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the cover plate testing device of this utility model;

[0018] Figure 2 for Figure 1 The cross-sectional view of the cover plate testing device shown.

[0019] Figure label:

[0020] Lower mold 100; receiving groove 110; boss 120; air passage 130; first end 131; second end 132; upper mold 200; through hole 210; guide slope 220; sealing assembly 300; first sealing ring 310; second sealing ring 320; cover plate structure 400; pole post 410; upper plastic 420; top cover plate 430. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0025] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] The following is for reference. Figures 1 to 2 This invention describes a cover plate testing device according to an embodiment of the present invention.

[0027] like Figures 1 to 2 As shown, the cover plate testing device according to an embodiment of the present invention includes: a lower mold 100, an upper mold 200, and a sealing assembly 300. The lower mold 100 has a recessed receiving groove 110 and a boss 120 on the outer periphery of the receiving groove 110. The receiving groove 110 is used to receive the upright cover plate structure 400. The lower mold 100 is also provided with an air passage 130, which connects the receiving groove 110 and an external gas supply device. The upper mold 200 has a through hole 210 at the position corresponding to the receiving groove 110, so as to expose the pole post 410 and the upper plastic 420 of the cover plate structure 400 after the mold is closed. The sealing assembly 300 is provided at the bottom of the upper mold 200 to seal the gap between the outer edge of the top cover plate 430 in the cover plate structure 400 and the upper mold 200 and the lower mold 100.

[0028] Understandably, this cover plate testing device includes a lower mold 100, an upper mold 200, and a sealing assembly 300. In use, the cover plate structure 400 is first placed upright in the receiving groove 110 of the lower mold 100. Then, the upper mold 200 is pressed onto the cover plate structure 400 and the lower mold 100, so that the sealing assembly 300 at the bottom of the upper mold 200 can seal the gap between the outer edge of the top cover plate 430 and the upper mold 200 and the lower mold 100. After gas is introduced into the air passage 130 of the lower mold 100, the gas enters the cover plate structure 400 from below the top cover plate 430. It is then observed whether there is any... Bubbles emerge from the through-hole 210 of the upper mold 200. If bubbles are present, it indicates that the cover structure 400 is not airtight; otherwise, it is airtight. Simultaneously, the gas pressure is increased to a certain level, and then the flatness change of the top cover 430 before and after the water pressure test is confirmed by a flatness testing device. This confirms the deformation of the top cover 430 after the internal gas pressure of the battery increases. Therefore, the cover testing device of this application can not only test the airtightness of the battery cover structure 400, but also simultaneously simulate the effect of internal gas pressure changes on the top cover 430, achieving two goals at once and simplifying the testing steps.

[0029] When bubbles are observed emerging from the through hole 210, it is necessary to further confirm whether they are emerging from the explosion-proof valve or from the pole post 410, in order to further confirm whether the explosion-proof valve structure is unqualified or the pole post 410 welding is unqualified.

[0030] It is understood that the sealing assembly 300 includes a first sealing ring 310 and a second sealing ring 320. The first sealing ring 310 is positioned closer to the center line of the through hole 210 of the upper mold 200 than the second sealing ring 320, and is used to press against the upper end face of the top cover plate 430. The second sealing ring 320 is located between the bottom surface of the upper mold 200 and the boss 120 to seal the gap between the upper mold 200 and the lower mold 100. For example, as Figure 2 As shown, in this embodiment, the sealing assembly 300 includes a first sealing ring 310 located on the inner ring of the bottom of the upper mold 200 and a second sealing ring 320 located on the outer ring. After the mold is closed, the first sealing ring 310 is located between the upper mold 200 and the top cover plate 430, thereby sealing and limiting the outer edge of the top cover plate 430 between the upper mold 200 and the lower mold 100. The second sealing ring 320 is located between the upper mold 200 and the boss 120, thereby sealing the gap between the upper mold 200 and the lower mold 100. This allows the gas entering the air passage 130 to be located only below the top cover plate 430, in order to test the air tightness of the pole post 410 and the explosion-proof plate.

[0031] Understandably, the inner diameter of the boss 120 is smaller than the outer diameter of the top cover plate 430 so that the outer edge of the top cover plate 430 can be attached to the boss 120. For example, as Figure 2As shown, in this embodiment, by hanging the outer edge of the top cover plate 430 on the boss 120, it is ensured that the first sealing ring 310 can be pressed and sealed on the upper end face of the top cover plate 430.

[0032] It is understood that a connecting component is also included, which is located between the upper mold 200 and the lower mold 100 and connects the upper mold 200 and the lower mold 100. For example, as... Figure 2 As shown, in this embodiment, the upper mold 200 and the lower mold 100 are connected by a connecting component, which facilitates the placement of the cover plate testing device in water during the testing process to observe the airtightness phenomenon.

[0033] It is understood that the connecting component is a locking member, the upper mold 200 has a through hole, and the lower mold 100 has a threaded hole. The locking member passes through the through hole and is threadedly connected to the threaded hole. For example, in this embodiment, the connecting component is a locking member, which passes through the through hole of the upper mold 200 and is threadedly connected to the lower mold 100 to lock the upper mold 200 and the lower mold 100, thereby achieving the connection and fixation of the upper mold 200 and the lower mold 100.

[0034] It is understandable that the air passage 130 is L-shaped, with its two ends penetrating the top and side of the lower mold 100, respectively. For example, as... Figure 2 As shown, in this embodiment, the air passage 130 is set to an L-shape so that the vertical part is connected to the bottom of the receiving groove 110 and the horizontal part is connected to the external gas supply device.

[0035] It is understood that the two ends of the air passage 130 are a first end 131 and a second end 132, respectively. The first end 131 penetrates the top of the lower mold 100 and is located in the middle of the receiving groove 110. The first end 131 is positioned corresponding to the bottom of the pole post 410. For example, as Figure 2 As shown, in this embodiment, the air passage 130 penetrates the top of the receiving groove 110 and is positioned corresponding to the pole post 410, thereby allowing it to enter below the top cover plate 430 through the gap between the bottom of the pole post 410 and the lower mold 100. Of course, in other embodiments, the first end 131 can also enter below the top cover plate 430 through the side wall of the receiving groove 110.

[0036] It is understood that both the receiving groove 110 and the through hole 210 are circular. For example, as Figures 1 to 2 As shown, in this embodiment, both the receiving groove 110 and the through hole 210 are circular to facilitate processing.

[0037] It is understandable that the upper mold 200 and the lower mold 100 have a rectangular external shape. For example, as shown... Figures 1 to 2 As shown, in this embodiment, the external structure of the upper mold 200 and the lower mold 100 is a cuboid, which facilitates the sealing of the pipeline with the outer wall of the lower mold 100 during the process of introducing an external gas supply device.

[0038] Understandably, the top of the upper mold 200 is provided with a guide slope 220 that transitions to the through hole 210. For example, as... Figure 1 As shown, in this embodiment, a guide slope 220 is provided on the top of the upper mold 200 to avoid observing the airtightness results of the battery cover structure 400.

[0039] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A cover plate testing device, characterized in that, include: The lower mold has a recessed receiving groove in the middle and a protrusion on the outer periphery of the receiving groove. The receiving groove is used to receive the upright cover plate structure. The lower mold is also provided with an air passage, which connects the receiving groove and an external gas supply device. The upper mold has a through hole at the position corresponding to the receiving groove, so as to expose the pole and upper plastic of the cover plate structure after the mold is closed; A sealing assembly is provided at the bottom of the upper mold to seal the gap between the outer edge of the top cover plate and the upper and lower molds in the cover plate structure.

2. The cover plate testing device according to claim 1, characterized in that, The sealing assembly includes a first sealing ring and a second sealing ring. The first sealing ring is positioned closer to the center line of the upper mold through hole than the second sealing ring and is used to press against the upper end face of the top cover plate. The second sealing ring is located between the bottom surface of the upper mold and the boss to seal the gap between the upper mold and the lower mold.

3. The cover plate testing device according to claim 2, characterized in that, The inner diameter of the boss is smaller than the outer diameter of the top cover plate, so that the outer edge of the top cover plate can be attached to the boss.

4. The cover plate testing device according to claim 1, characterized in that, It also includes a connecting component, which is disposed between the upper mold and the lower mold and connects the upper mold and the lower mold.

5. The cover plate testing device according to claim 4, characterized in that, The connecting component is a locking member. The upper mold has a through hole, the lower mold has a threaded hole, and the locking member passes through the through hole and is threadedly connected to the threaded hole.

6. The cover plate testing device according to claim 1, characterized in that, The air passage is L-shaped, with its two ends penetrating the top and side of the lower mold, respectively.

7. The cover plate testing device according to claim 6, characterized in that, The air passage has a first end and a second end at its two ends. The first end passes through the top of the lower mold and is located in the middle of the receiving groove. The first end is set at the bottom of the pole post.

8. The cover plate testing device according to claim 1, characterized in that, Both the receiving groove and the through hole are circular.

9. The cover plate testing device according to claim 1, characterized in that, The upper mold and the lower mold are rectangular in shape.

10. The cover plate testing device according to claim 1, characterized in that, The top of the upper mold is provided with a guide slope that transitions to the through hole.

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