Blasting testing device

Abstract

The utility model discloses a blasting testing device which comprises a first supporting plate, a second supporting plate movably arranged relative to the first supporting plate and at least one puncturing assembly installed in the second supporting plate. The puncturing assembly comprises a puncturing needle cylinder and a sealing piece arranged in the circumferential direction of the puncturing needle cylinder, an air outlet channel is formed in the puncturing needle cylinder, and the air outlet channel is externally connected with an air source. According to the utility model, the puncture port is sealed when the puncture needle cylinder punctures the battery shell, and the puncture needle cylinder is connected with an air source, so that the air pressure test is effectively carried out on the interior of the battery shell, and the test efficiency is improved.

Description

Technical Field

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

[0002] The explosion-proof valve of lithium battery is a safety protection device. It has the function of pressure release. When the internal pressure of the battery rises abnormally, the explosion-proof valve will open a safe channel to release the pressure to prevent the battery from exploding due to excessive internal pressure. The explosion-proof valve has the function of maintaining battery performance. The explosion-proof valve can protect the battery from the influence of abnormal internal pressure and maintain the performance and service life of the battery. Therefore, it is particularly important to detect the opening pressure of the explosion-proof valve.

[0003] The existing testing device punctures the battery shell, connects the puncture hole of the battery shell through an intake pipe, inserts the intake pipe into the puncture hole, sprays the intake pipe with sealant to connect the puncture hole, waits for the sealant to cure to achieve sealing, and then performs an air pressure test on the inside of the battery shell. The testing process is complicated to operate, requires the use of auxiliary sealant, is time-consuming, and has low testing efficiency. Utility Model Content

[0004] The purpose of the utility model is to solve the above technical problems and provide a burst test device, so that the puncture needle can seal the puncture port when puncturing the battery shell, and the puncture needle is connected to the air source, so as to effectively perform air pressure test on the inside of the battery shell and improve the test efficiency. In order to achieve the above purpose, the technical scheme of the utility model is as follows:

[0005] The bursting test device includes a first support plate, a second support plate movably arranged relative to the first support plate, and at least one puncture assembly installed in the second support plate; the puncture assembly includes a puncture syringe and a sealing member arranged around the puncture syringe, and an air outlet channel is arranged in the puncture syringe, and the air outlet channel is connected to an external air source.

[0006] Specifically, the puncture assembly also includes a mounting seat, the puncture syringe is arranged in the mounting seat, and the mounting seat includes a mounting plate, a first seat body arranged on the top of the mounting plate, and a second seat body arranged on the bottom of the mounting plate.

[0007] Specifically, the first seat body and the second seat body are provided with an air inlet passage penetrating therethrough, and the air inlet passage is communicated with the air outlet passage.

[0008] Specifically, the puncture syringe includes a syringe body and a puncture tip connected to the syringe body.

[0009] Specifically, the second seat body is provided with an inner cavity for accommodating the syringe body, the syringe body is interference-fitted with the inner cavity, and the puncture tip is exposed outside the second seat body.

[0010] Specifically, the mounting plate is disposed on the top of the second support plate, the first seat body is located above the second support plate, and the second seat body penetrates the second support plate and extends to below the second support plate.

[0011] Specifically, the syringe body is provided with an air outlet channel which penetrates along the axial direction, and the puncture tip is provided with a plurality of air outlet branches in the circumferential direction, and the air outlet channel is connected with the plurality of air outlet branches.

[0012] Specifically, a sealing groove is provided at the end of the second seat body, the sealing groove is located outside the circumference of the puncture needle cylinder, and the sealing member is provided in the sealing groove.

[0013] Specifically, a plurality of guide pillars are arranged between the first support plate and the second support plate, and the second support plate is movably arranged along the plurality of guide pillars.

[0014] Specifically, a positioning cavity is provided on the surface of the first support plate, an annular groove is provided on the circumferential outer portion of the positioning cavity, a sealing ring is provided in the annular groove, and the interior of the positioning cavity is externally connected to a vacuum generating device.

[0015] Compared with the prior art, the beneficial effects of the blasting test device of the utility model are mainly reflected in:

[0016] By setting the sealing member at the circumferential outer position of the puncture syringe, when the puncture syringe is punctured, the sealing member can stably form a seal around the puncture port caused by the puncture syringe, and the air outlet channel of the puncture syringe is connected to an external air source, and the test air pressure state is controlled by the air source, and then the air outlet channel outputs accurate test air pressure, thereby improving the accuracy and efficiency of the test. The overall test device has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic front view of a burst test device provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the structure of the explosion test device provided in an embodiment of the present application;

[0019] Figure 3 This is one of the structural schematic diagrams of the puncture assembly provided in an embodiment of the present application;

[0020] Figure 4 The second structural schematic diagram of the puncture assembly provided in the embodiment of the present application;

[0021] Figure 5 This is an enlarged schematic diagram of a partial cross-section of the puncture assembly provided in an embodiment of the present application.

[0022] Reference numerals:

[0023] Battery housing 1, explosion-proof valve 11;

[0024] A first support plate 2, a positioning cavity 21, and an annular groove 22;

[0025] The second support plate 3, the guide column 31, and the tightening knob 32;

[0026] The puncture assembly 4, the puncture syringe 41, the sealing member 42, the air outlet channel 43, the syringe body 44, the puncture tip 45, the step portion 46, and the air outlet branch 47;

[0027] The mounting seat 5 , the mounting plate 51 , the first seat body 52 , the second seat body 53 , the air inlet passage 54 , the inner cavity 55 , the air nozzle 56 , and the sealing groove 57 . DETAILED DESCRIPTION

[0028] 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.

[0029] Embodiment 1

[0030] The present embodiment provides a burst test device for testing the opening air pressure data of the explosion-proof valve 11 in the battery. The burst test is performed in a real environment where the explosion-proof valve 11 is installed on the battery shell 1. The battery shell 1 is punctured and then the punctured portion is inflated to simulate the increase in air pressure inside the battery shell 1. When the air pressure in the battery shell 1 exceeds the opening threshold of the explosion-proof valve 11, the explosion-proof valve 11 explodes, and then the opening air pressure data of the explosion-proof valve 11 is obtained, so as to accurately evaluate the performance of the explosion-proof valve 11 and the overall performance of the battery.

[0031] Figure 1 A schematic front view of a burst test device provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of the explosion test device provided in an embodiment of the present application; Figure 3 This is one of the structural schematic diagrams of the puncture assembly provided in an embodiment of the present application; Figure 4 The second structural schematic diagram of the puncture assembly provided in the embodiment of the present application; Figure 5 This is an enlarged schematic diagram of a partial cross-section of the puncture assembly provided in an embodiment of the present application.

[0032] like Figure 1 , Figure 3-Figure 5 As shown, this embodiment provides a burst test device, comprising a first support plate 2, a second support plate 3 movably arranged relative to the first support plate 2, and at least one puncture assembly 4 installed in the second support plate 3;

[0033] The puncture assembly 4 includes a puncture syringe 41 and a seal 42 arranged around the puncture syringe 41. An air outlet channel 43 is arranged inside the puncture syringe 41, and the air outlet channel 43 is connected to an external air source. The air source can be provided by an air pressure device (not shown in the figure), and the air pressure device controls the air pressure value of the air source.

[0034] The puncture assembly 4 provided in this embodiment also includes a mounting seat 5, and the puncture syringe 41 is arranged in the mounting seat 5. The mounting seat 5 includes a mounting plate 51, a first seat body 52 arranged on the top of the mounting plate 51, and a second seat body 53 arranged on the bottom of the mounting plate 51.

[0035] The first seat body 52 and the second seat body 53 may be cylindrical structures, square pillar structures, or prismatic structures. In this embodiment, the first seat body 52 and the second seat body 53 are both cylindrical structures, and the first seat body 52 and the second seat body 53 are coaxially arranged.

[0036] The first seat 52 and the second seat 53 are provided with an air inlet channel 54 which penetrates therethrough, and the air inlet channel 54 is connected to the air outlet channel 43. The puncture syringe 41 includes a syringe body 44 and a puncture tip 45 connected to the syringe body 44. The puncture syringe 41 is coaxially arranged with the second seat 53. The second seat 53 is provided with an inner cavity 55 for accommodating the syringe body 44. The syringe body 44 and the inner cavity 55 are correspondingly plugged and matched, specifically, the syringe body 44 and the inner cavity 55 are plugged and matched with each other by interference, and the syringe body 44 is stably connected with the second seat 53. The puncture tip 45 is exposed outside the second seat 53, so as not to affect the puncture function of the puncture tip 45.

[0037] The syringe body 44 is provided with a step portion 46 in the circumference thereof, and the inner cavity 55 cooperates with the step portion 46 and limits the position thereof, so that when the syringe body 44 is assembled along the second seat body 53, it can be accurately limited to a designated position, and the assembly is convenient.

[0038] The mounting plate 51 is disposed on the top of the second support plate 3, the first seat body 52 is located above the second support plate 3, and the second seat body 53 penetrates the second support plate 3 and extends to the bottom thereof. The mounting plate 51 is detachably connected to the second support plate 3, and the mounting plate 51 and the second support plate 3 can be connected by screw connection, clamping connection, etc.

[0039] In this embodiment, a plurality of mounting holes are provided in the mounting plate 51 , and the mounting plate 51 and the second support plate 3 are connected and fixed by bolts inserted into the mounting holes.

[0040] An air outlet channel 43 is provided in the syringe body 44 and runs through the syringe body 44 in the axial direction. The puncture tip 45 is in a conical structure. A plurality of air outlet branches 47 are provided circumferentially of the puncture tip 45. The air outlet channel 43 and the plurality of air outlet branches 47 are connected to disperse and evenly distribute the gas in the air outlet channel 43.

[0041] An air nozzle 56 connected to an external air source is disposed at the end of the first seat body 52 . The air nozzle 56 is connected to the air inlet passage 54 , so as to be conveniently connected to an external air pressure device through the air nozzle 56 .

[0042] A sealing groove 57 is provided at the end of the second seat body 53, the center of the sealing groove 57 is located at the axial position of the second seat body 53, and the sealing groove 57 is located circumferentially outside the puncture syringe 41. A sealing member 42 is provided in the sealing groove 57, and the sealing member 42 is partially embedded in the sealing groove 57. The end surface of the sealing member 42 exposed to the sealing groove 57 is a sealing surface, and the sealing surface is vertically arranged relative to the axis of the mounting seat 5.

[0043] The specific testing method of the bursting test device is as follows: adjust the position height of the puncturing syringe 41 so that the puncturing tip 45 of the puncturing syringe 41 punctures the surface of the battery shell 1, the puncturing tip 45 of the puncturing syringe 41 enters the interior of the battery shell 1, and forms a puncture hole on the surface of the battery shell 1, the air outlet branch 47 of the puncturing tip 45 is inside the battery shell 1, the sealing member 42 abuts against the surface of the battery shell 1, and then forms a seal on the circumferential outside of the puncture hole, the interior of the battery shell 1 is inflated by the air outlet channel 43 of the puncturing syringe 41, the gas pressure is adjusted, and the opening air pressure data of the explosion-proof valve 11 in the battery shell 1 is tested.

[0044] In the present embodiment, the sealing member 42 is arranged at the circumferential outer position of the puncturing syringe 41. When the puncturing syringe 41 is subjected to puncturing, the sealing member 42 can stably form a seal around the puncture port caused by the puncturing syringe 41. The air outlet channel 43 of the puncturing syringe 41 is connected to an external air source, and the test air pressure state is controlled by the air source, so that the air outlet channel 43 outputs accurate test air pressure, thereby improving the accuracy and efficiency of the test. The overall test device has a simple structure and is easy to operate.

[0045] Embodiment 2

[0046] This embodiment optimizes the burst test device on the basis of the above embodiment, especially provides a specific implementation method of the first support plate and the second support plate:

[0047] The first support plate 2 and the second support plate 3 may be a circular plate structure, a square plate structure, or a special-shaped plate structure. A space for positioning the battery housing 1 is formed between the first support plate 2 and the second support plate 3. In this embodiment, the first support plate 2 and the second support plate 3 are rectangular plate structures and are planar plate structures.

[0048] Figure 1 A schematic front view of a burst test device provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of the explosion testing device provided in an embodiment of the present application.

[0049] like Figure 1 , Figure 2 As shown, the first support plate 2 is understood as a fixed plate, the second support plate 3 is understood as a movable plate, the first support plate 2 is in a lower position, the second support plate 3 is in an upper position, and the second support plate 3 is lifted and lowered relative to the first support plate 2. A plurality of guide pillars 31 are arranged between the first support plate 2 and the second support plate 3, and the second support plate 3 is arranged to move along the plurality of guide pillars 31.

[0050] The second support plate 3 can be connected to a driving member (not shown in the figure) to realize the lifting action of the second support plate 3. The driving member can be a pneumatic driving member, a hydraulic driving member, or an electric driving member, which is not limited in this application. In order to reduce the cost of the overall device and simplify the structure, the guide column 31 in this embodiment is a screw, and a tightening knob 32 that cooperates with its thread is provided on the guide column 31. When performing a burst test, the bottom surface of the second support plate 3 is pressed against the surface of the battery housing 1, thereby determining the position height of the second support plate 3 on the guide columns 31, and fixing the second support plate 3 at this position height by tightening the knob 32 to ensure that the seal 42 and the surface of the battery housing 1 remain sealed.

[0051] The surface of the first support plate 2 is provided with a positioning cavity 21, and the positioning cavity 21 is adapted to the size of the battery housing 1. The battery housing 1 can be embedded in the positioning cavity 21, or it can be located above the positioning cavity 21. In this embodiment, the battery housing 1 is positioned on the surface of the first support plate 2 and is located above the positioning cavity 21. The circumferential outer portion of the positioning cavity 21 is provided with an annular groove 22, and a sealing ring is provided in the annular groove 22 for sealing contact with the battery housing 1. In this embodiment, the positioning cavity 21 is a vacuum cavity, and the interior of the positioning cavity 21 is externally connected to a vacuum generating device (not shown in the figure), so that the positioning cavity 21 has a vacuum adsorption effect, thereby stably positioning the battery housing 1. One side of the battery housing 1 is positioned on the first support plate 2, and the other side of the battery housing 1 is positioned on the second support plate 3. The first support plate 2 and the second support plate 3 form a stable positioning space, which can adaptively position battery housings 1 of different sizes, has the effect of rapid positioning, and improves the efficiency of the explosion test of the explosion-proof valve 11 in the battery housing 1.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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. Explosion test device, characterized in that: It includes a first support plate, a second support plate movably arranged relative to the first support plate, and at least one puncture assembly installed in the second support plate; the puncture assembly includes a puncture syringe and a sealing member arranged around the puncture syringe, an air outlet channel is arranged in the puncture syringe, and the air outlet channel is connected to an external air source.

2. The burst test device according to claim 1, characterized in that: The puncture assembly also includes a mounting seat, the puncture syringe is arranged in the mounting seat, and the mounting seat includes a mounting plate, a first seat body arranged on the top of the mounting plate, and a second seat body arranged on the bottom of the mounting plate.

3. The burst test device according to claim 2, characterized in that: The first seat body and the second seat body are provided with an air inlet passage penetrating therethrough, and the air inlet passage is communicated with the air outlet passage.

4. The burst test device according to claim 2, characterized in that: The puncture syringe comprises a syringe body and a puncture tip connected to the syringe body.

5. The burst test device according to claim 4, characterized in that: The second seat body is provided with an inner cavity for accommodating the syringe body, the syringe body and the inner cavity are interference-fitted, and the puncture tip is exposed outside the second seat body.

6. The burst test device according to claim 2, characterized in that: The mounting plate is arranged on the top of the second supporting plate, the first seat body is located above the second supporting plate, and the second seat body penetrates the second supporting plate and extends to the bottom thereof.

7. The burst test device according to claim 4, characterized in that: The syringe body is provided with an air outlet passage penetrating along the axial direction, and the puncture tip is provided with a plurality of air outlet branches in the circumferential direction, and the air outlet passage is connected with the plurality of air outlet branches.

8. The burst test device according to claim 2, characterized in that: A sealing groove is provided at the end of the second seat body, the sealing groove is located outside the circumference of the puncture needle cylinder, and the sealing member is provided in the sealing groove.

9. The burst test device according to claim 1, characterized in that: A plurality of guide pillars are arranged between the first support plate and the second support plate, and the second support plate is movably arranged along the plurality of guide pillars.

10. The burst test device according to claim 1, characterized in that: A positioning cavity is arranged on the surface of the first supporting plate, an annular groove is arranged on the circumferential outer portion of the positioning cavity, a sealing ring is arranged in the annular groove, and the interior of the positioning cavity is externally connected to a vacuum generating device.

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