Explosion-proof test device

Abstract

The utility model discloses an explosion-proof test device, which relates to the technical field of battery detection. The explosion-proof test device includes a shell, a gland assembly and a heating device. The shell is provided with an inner cavity for accommodating a battery and an open end connected to the inner cavity; the gland assembly is used to fix the plate to be tested to the shell and seal the open end, and the explosion-proof valve of the battery is arranged toward the plate to be tested; the heating device includes a heating element for heating the battery. During the test, it is only necessary to heat the battery to cause the battery to explode, and the explosion-proof performance of the plate to be tested can be judged by observing the damage, combustion and state changes of the plate to be tested. The structure is simple and easy to use.

Description

Technical Field

[0001] The utility model relates to the technical field of battery detection, in particular to an explosion-proof testing device. Background Art

[0002] New energy vehicles use rechargeable batteries to provide power. The batteries are usually installed at the bottom of the vehicle, and a battery protection shield is usually set outside the battery. When the battery catches fire, high temperature and high pressure will be generated. The battery protection shield needs to play a good explosion-proof role when the battery catches fire to reduce the harm to the people in the car.

[0003] As far as the applicant knows, there is currently no device that can test the explosion-proof performance of a battery protective cover. Therefore, it is necessary to provide an explosion-proof testing device to test the explosion-proof performance of the protective cover material when dealing with battery fire and explosion, so as to provide a reference for the safety of new energy vehicles. Utility Model Content

[0004] The utility model aims to provide an explosion-proof testing device capable of testing the explosion-proof performance of a battery protective cover.

[0005] In order to achieve the above utility model purpose, the utility model proposes an explosion-proof testing device, comprising:

[0006] A housing having an inner cavity for accommodating the battery and an open end communicating with the inner cavity;

[0007] A gland assembly, used to fix the plate to be tested to the housing and seal the open end, the explosion-proof valve of the battery is arranged toward the plate to be tested, the plate to be tested is a part of the battery protective cover, or is made of the same material as the battery protective cover; and

[0008] A heating device includes a heating element for heating the battery.

[0009] Furthermore, the explosion-proof testing device also includes a first temperature sensor arranged corresponding to the explosion-proof valve, a second temperature sensor attached to the outer surface of the plate to be tested away from the inner cavity, and an air pressure sensor arranged in the inner cavity.

[0010] Furthermore, the housing is provided with a bracket extending toward the explosion-proof valve and a wiring hole connecting the inner and outer sides of the housing; the first temperature sensor and the air pressure sensor are fixed on the bracket and routed through the wiring hole.

[0011] Furthermore, the first temperature sensor is located between the explosion-proof valve and the plate to be tested.

[0012] Furthermore, a supporting surface is provided at the open end of the shell, and the pressure cover assembly includes a sealing gasket arranged between the plate to be tested and the supporting surface, a pressure cover arranged on the outer surface of the plate to be tested, and a fastener for pressing the pressure cover, the plate to be tested and the sealing gasket onto the supporting surface.

[0013] Furthermore, the opening end is provided with an annular boss surrounding the outer circumference of the plate to be tested, and the annular boss is clearance-matched with the plate to be tested;

[0014] The fastener passes through the gland, the plate to be tested and the sealing gasket and is threadedly connected to the housing; or,

[0015] The fastener passes through the gland and is threadedly connected to the housing without passing through the plate to be tested and the sealing gasket.

[0016] Furthermore, the explosion-proof testing device further comprises a carrier plate disposed in the inner cavity and a height adjusting member for adjusting the height of the carrier plate, wherein the carrier plate is used to carry the battery.

[0017] Furthermore, the height adjusting member is multiple in number and is located outside the battery. The height adjusting member is threadedly connected to the carrier plate and abuts against the bottom plate of the shell. The shell is provided with a limit hole corresponding to the height adjusting member.

[0018] Furthermore, the explosion-proof testing device also includes a limiting assembly for limiting the position of the battery, the limiting assembly includes a fixing block fixedly connected to the carrier plate and a bolt threadedly connected to the fixing block, and the bolt is used to abut against the battery.

[0019] Furthermore, the heating element is in sheet form and is attached to the outer surface of the battery; the outer shell is provided with a safety valve;

[0020] The outer part of the housing is provided with an outwardly convex annular or hook-shaped connecting piece;

[0021] The bottom of the shell is provided with casters;

[0022] The strength of the material of the shell is greater than the strength of the material of the plate to be tested, and the material of the shell is a metal material.

[0023] Compared with the prior art, the utility model has the following beneficial effects: in the utility model, the battery is arranged in the shell, the plate to be tested is pressed on the shell by the pressure cover assembly, and the opening of the shell is sealed. During the test, it is only necessary to heat the battery to make the battery explode. By observing the damage, combustion and state changes of the plate to be tested, the explosion-proof performance of the plate to be tested can be judged, and then the explosion-proof performance of the battery protective cover can be judged. The structure is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an explosion-proof testing device in an embodiment of the utility model.

[0025] Figure 2 yes Figure 1 The front view of the explosion-proof test device is shown.

[0026] Figure 3 is along Figure 2 Sectional view obtained by cutting along the AA cutting line.

[0027] Figure 4 yes Figure 1 Schematic diagram of the explosion proof test apparatus shown without the gland assembly.

[0028] Figure 5 yes Figure 1 Exploded view of the explosion proof test rig shown.

[0029] Figure 6 It is an exploded view of a housing and a gland assembly of an embodiment of the utility model.

[0030] Figure 7 yes Figure 6 A cross-sectional view of the assembled housing and gland assembly is shown.

[0031] Figure 8 yes Figure 7 Enlarged view of part I in the middle.

[0032] Fig. 9 It is a structural schematic diagram of an explosion-proof testing device in an embodiment of the utility model, in which a battery is arranged on a carrier plate.

[0033] Fig.10 yes Fig. 9 Top view of the housing.

[0034] Fig.11 It is a schematic diagram of the position of the battery limited by the limiting component.

[0035] Fig.12 It is a schematic diagram of the explosion-proof test device of the utility model when it is provided with a connecting piece and casters. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0038] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] like Figures 1 to 3 As shown, an explosion-proof testing device corresponding to a preferred embodiment of the utility model includes a housing 1, a gland assembly 3 and a heating device.

[0040] refer to Figure 3 and Figure 4 The housing 1 is provided with an inner cavity 10 for accommodating the battery 2 and an open end 11 communicating with the inner cavity 10 .

[0041] The gland assembly 3 is used to fix the plate 30 to be tested to the housing 1 and seal the open end 11. The battery 2 is provided with an explosion-proof valve 20. When the internal pressure of the battery 2 is too high, the internal gas will first be ejected from the explosion-proof valve 20 to improve the safety of the battery. The explosion-proof valve 20 can be, for example, an explosion-proof engraved line, an explosion-proof pattern or other structural forms. The explosion-proof valve 20 is set toward the plate 30 to be tested, so that the plate 30 to be tested is directly facing the explosion-proof valve 20. The airflow and substances generated by the explosion of the battery 2 can directly impact the plate 30 to be tested, thereby improving the accuracy of the test results.

[0042] The plate 30 to be tested is a part of the battery protective cover (for example, cut directly from the battery protective cover), or is made of the same material as the battery protective cover. Preferably, its thickness is the same as that of the battery protective cover to more accurately test the actual explosion-proof performance of the battery protective cover.

[0043] The heating device includes a heating element 40 for heating the battery 2, and detonates the battery 2 by means of electrical heating. The lead of the heating device extends to the outside of the housing 1, and the heating element 40 is controlled to heat up by an external controller and power supply, thereby achieving a safe detonation effect.

[0044] During the test, the battery 2 is fixed inside the outer shell 1 so that its explosion-proof valve 20 faces upward, and then the plate 30 to be tested is fixed to the outer shell 1 through the gland assembly 3 so that the plate 30 to be tested seals the open end 11. Then the heating element 40 is started to heat the battery 2, causing the battery 2 to explode. The high-temperature, high-pressure gas and material generated by the explosion of the battery 2 will impact the plate 30 to be tested. By observing the characteristics of the damage, combustion and state change of the plate 30 to be tested, the explosion-proof performance of the plate 30 to be tested can be tested. Since the battery 2 is directly used for explosion detection, the explosion-proof performance of the plate 30 to be tested can be tested more accurately. Since the material of the plate 30 to be tested is the same as that of the battery protective cover, the explosion-proof performance of the battery protective cover can be judged based on the explosion-proof performance of the plate 30 to be tested.

[0045] The strength of the material of the shell 1 is greater than the strength of the material of the plate 30 to be tested. Optionally, when the battery 2 explodes, the structure of the shell 1 will not be destroyed, so that the shell 1 can be reused. The material of the shell 1 can be, for example, a metal material such as steel or iron. In some embodiments, the shell 1 is provided with a safety valve 17, and the safety valve 17 is used to control the pressure in the shell 1 not to exceed a specified value. The set pressure value of the safety valve 17 is greater than the air pressure value when the plate 30 to be tested is destroyed, and is less than the air pressure value when the shell 1 is destroyed, so as to prevent the shell 1 from being exploded, which can effectively improve the safety during the test.

[0046] In some embodiments, the explosion-proof testing device further includes a detection component. Figures 1 to 4 As shown, the detection component includes a first temperature sensor 60 arranged corresponding to the explosion-proof valve 20 and a second temperature sensor 61 attached to the outer surface 300 of the plate 30 to be tested away from the inner cavity 10. The housing 1 is provided with a bracket 12 extending toward the explosion-proof valve 20. The bracket 12 can be fixedly connected to the housing 1 by welding, or can be detachably connected to the housing 1 by screwing or other means. Optionally, the bracket 12 is screwed to the housing 1, and the length of the bracket 12 extending out of the housing 1 is adjustable. By controlling the length of the screwing out, the extension distance of the bracket 12 can be controlled, and then the position of the first temperature sensor 60 can be adjusted to make it adjustable with the position of the explosion-proof valve 20. Optionally, the first temperature sensor 60 is located between the explosion-proof valve 20 and the plate 30 to be tested, and it is arranged directly opposite to the explosion-proof valve 20 to more accurately test the temperature of the substance sprayed from the explosion-proof valve 20.

[0047] The second temperature sensor 61 can detect the temperature of the outer surface 300 of the plate 30 to be tested. By combining the temperature conditions of the first temperature sensor 60 and the second temperature sensor 61, it is possible to determine the temperature barrier and tolerance of the plate 30 to be tested after the battery 2 explodes. There can be multiple second temperature sensors 61, and their arrangement positions can be selected as needed.

[0048] In some embodiments, reference Figure 3 The explosion-proof test device further includes an air pressure sensor 62 disposed in the inner cavity 10. The position of the air pressure sensor 62 is not limited, for example, it can be disposed on the bracket 12, or on the inner wall of the housing 1, preferably on the bracket 12. The air pressure sensor 62 can detect the air pressure in the inner cavity 10 when the battery 2 explodes, thereby testing the tolerance of the plate 30 to the air pressure shock.

[0049] like Figure 3 As shown, the housing 1 is provided with a wiring hole 13 connecting the inside and outside thereof, and the electronic components inside the housing 1 can be routed through the wiring hole 13, for example, the first temperature sensor 60, the heating element 40 and the air pressure sensor 62 can all be routed through the wiring hole 13. There can be multiple wiring holes 13, and their areas are small, and certain sealing measures can be taken to reduce the influence of the wiring holes 13 on the air pressure inside the housing 1.

[0050] like Figure 4 As shown, the open end 11 of the housing 1 is provided with a support surface 110, and the support surface 110 is a plane. Optionally, the housing 1 is provided with a horizontally convex and / or inwardly convex flange portion 1a. Figure 3 and Figure 5 As shown, the gland assembly 3 includes a sealing gasket 31 disposed between the plate 30 to be tested and the support surface 110, a gland 33 disposed on the outer surface 300 of the plate 30 to be tested, and a fastener 32 for pressing the gland 33, the plate 30 to be tested, and the sealing gasket 31 onto the support surface 110. The gland 33 is annular, exposing the plate 30 to be tested, or the gland 33 is provided with one or more holes for exposing the plate 30 to be tested. In some embodiments, the fastener 32 passes through the gland 33, the plate 30 to be tested, and the sealing gasket 31, and then is screwed to the housing 1, so that the plate 30 to be tested is pressed onto the support surface 110. In other embodiments, the fastener 32 passes through the gland 33, the plate 30 to be tested, the sealing gasket 31, and the flange portion 1a, and the protruding portion is connected with a nut (not shown in the figure), and the plate 30 to be tested is clamped onto the housing 1 through the nut and the fastener 32. The material of the sealing gasket 31 may be, for example, silicone or rubber, which can play a sealing role to ensure that when the battery 2 explodes, the air pressure can more fully act on the plate to be tested 30. The fastener 32 may be, for example, a bolt.

[0051] In some embodiments, Figures 6 to 8As shown, the open end 11 is provided with an annular boss 14 surrounding the outer circumference of the plate to be tested 30, and the annular boss 14 is adapted to the plate to be tested 30, and the annular boss 14 is gap-matched with the plate to be tested 30. By shielding the outside of the plate to be tested 30 with the annular boss 14, the sealing can be further improved, which is beneficial to prevent the plate to be tested 30 from leaking due to an instantaneous gap between the support surface 110 and the support surface 110 after being impacted, and to prevent the flame from spraying from the side of the plate to be tested 30 when the battery 2 explodes, and to make the flame spray upward as much as possible. The plate to be tested 30 is also fixed to the outer shell 1 by a fastener 32. As an example, the fastener 32 passes through the pressure cover 33, the plate to be tested 30 and the sealing gasket 31 and is threadedly connected to the outer shell 1. At this time, the fastener 32 is connected to the support surface 110. As another example, Figure 8 As shown, the fastener 32 passes through the gland 33 and is threadedly connected to the annular boss 14 of the housing 1, and the gland 33 presses the plate 30 to be tested and the sealing gasket 31 on the support surface 110. Since the fastener 32 does not pass through the plate 30 to be tested and the sealing gasket 31, it is not necessary to open holes on the plate 30 to be tested and the sealing gasket 31, so the test is more convenient and the impact on the plate 30 to be tested is smaller.

[0052] In some embodiments, Fig. 9 As shown, the explosion-proof test device also includes a carrier plate 70 disposed in the inner cavity 10 and a height adjusting member 71 for adjusting the height of the carrier plate 70. The carrier plate 70 is used to carry the battery 2. By adjusting the height of the carrier plate 70, the distance between the battery 2 and the plate 30 to be tested can be adjusted. For example, the distance can be adjusted to the distance between the protective cover and the battery 2 during actual installation, so that the test is more in line with the actual situation.

[0053] As a feasible implementation, there are multiple height adjusting members 71, which are located outside the battery 2. The height adjusting members 71 are threadedly connected to the carrier 70 and abut against the bottom plate 15 of the housing 1. By rotating the height adjusting member 71 to change the length of the portion extending out of the carrier 70, the height of the carrier 70 can be adjusted. The number of height adjusting members 71 is preferably greater than or equal to three. Fig. 9 and Fig.11 In the illustrated embodiment, the height adjusting member 71 is a bolt, and there are four of them, which are arranged at the four corners of the carrier plate 70. In order to limit the position of the carrier plate 70 in the horizontal direction, refer to Fig.10 The housing 1 is provided with a limiting hole 160 corresponding to the height adjusting member 71 , and the height adjusting member 71 is located in the limiting hole 160 and thus cannot move horizontally. Fig. 9 and Fig.10 In the embodiment, a plurality of inwardly protruding limiting rings 16 are provided at the bottom of the housing 1 , and the inner holes of the limiting rings 16 are the limiting holes 160 .

[0054] In some embodiments, reference Figures 9 to 11The explosion-proof test device further includes a limiting assembly 8 for limiting the position of the battery 2 so as to fix the battery 2 in the housing 1. The limiting assembly 8 includes a fixing block 81 fixedly connected to the carrier plate 70 and a bolt 82 screwed to the fixing block 81 and abutting against the battery 2. By rotating the bolt 82, the bolt 82 can be driven to abut against the outer surface of the battery 2, thereby fixing the battery 2. It can be understood that when a heating element 40 is provided outside the battery 2, the bolt 82 will abut against the heating element 40. Optionally, as Fig.11 As shown, the four outer surfaces of the battery 2 are all provided with limiting components 8 for limiting.

[0055] In some embodiments, the heating element 40 is in sheet form and is attached to the outer surface of the battery 2 . When the heating element 40 is powered on, it will continue to heat the battery 2 until the battery 2 explodes due to overheating.

[0056] In some embodiments, the outer portion of the housing 1 is provided with a protruding ring-shaped or hook-shaped connecting member 18. Fig.12 In the illustrated embodiment, the connecting member 18 is annular. A rope can be connected to the connecting member 18, and when the explosion-proof test device catches fire, it can be quickly dragged to an open place by the rope, or after the test is completed, the explosion-proof test device can be dragged into a pool for rapid cooling.

[0057] Optionally, casters 19 are provided at the bottom of the housing 1 to enable the explosion-proof testing device to be dragged more labor-savingly.

[0058] The above are only specific implementations of the present invention, and any improvements made based on the concept of the present invention are deemed to be within the protection scope of the present invention.

Claims

1. An explosion-proof testing device, characterized in that: include: A housing (1) having an inner cavity (10) for accommodating a battery (2) and an open end (11) communicating with the inner cavity (10); A gland assembly (3) is used to fix the plate to be tested (30) to the housing (1) and seal the open end (11); the explosion-proof valve (20) of the battery (2) is arranged toward the plate to be tested (30); the plate to be tested (30) is a part of the battery protective cover, or is made of the same material as the battery protective cover; and A heating device comprises a heating element (40) for heating the battery (2).

2. The explosion-proof testing device according to claim 1, characterized in that: It also includes a first temperature sensor (60) arranged corresponding to the explosion-proof valve (20), a second temperature sensor (61) attached to the outer surface (300) of the plate (30) to be tested and facing away from the inner cavity (10), and an air pressure sensor (62) arranged in the inner cavity (10).

3. The explosion-proof testing device according to claim 2, characterized in that: The housing (1) is provided with a bracket (12) extending toward the explosion-proof valve (20) and a wiring hole (13) connecting the inner and outer sides of the housing (1); the first temperature sensor (60) and the air pressure sensor (62) are fixed on the bracket (12) and routed through the wiring hole (13).

4. The explosion-proof testing device according to claim 3, characterized in that: The first temperature sensor (60) is located between the explosion-proof valve (20) and the plate to be tested (30).

5. The explosion-proof testing device according to claim 1, characterized in that: The open end (11) of the housing (1) is provided with a supporting surface (110), and the pressure cover assembly (3) comprises a sealing gasket (31) provided between the plate to be tested (30) and the supporting surface (110), a pressure cover (33) provided on the outer surface (300) of the plate to be tested (30), and a fastener (32) for pressing the pressure cover (33), the plate to be tested (30) and the sealing gasket (31) onto the supporting surface (110).

6. The explosion-proof testing device according to claim 5, characterized in that: The opening end (11) is provided with an annular boss (14) surrounding the outer circumference of the plate (30) to be tested, and the annular boss (14) is clearance-matched with the plate (30) to be tested; The fastener (32) passes through the gland (33), the plate to be tested (30) and the sealing gasket (31) and is threadedly connected to the housing (1); or, The fastener (32) passes through the gland (33) and is threadedly connected to the housing (1), without passing through the plate to be tested (30) and the sealing gasket (31).

7. The explosion-proof testing device according to any one of claims 1 to 6, characterized in that: It also includes a carrier plate (70) arranged in the inner cavity (10) and a height adjustment member (71) for adjusting the height of the carrier plate (70), wherein the carrier plate (70) is used to carry the battery (2).

8. The explosion-proof testing device according to claim 7, characterized in that: The height adjusting members (71) are multiple in number and are located outside the battery (2); the height adjusting members (71) are threadedly connected to the carrier plate (70) and abut against the bottom plate (15) of the housing (1); the housing (1) is provided with a limiting hole (160) corresponding to the height adjusting member (71).

9. The explosion-proof testing device according to claim 7, characterized in that: It also includes a limiting assembly (8) for limiting the position of the battery (2), the limiting assembly (8) including a fixing block (81) fixedly connected to the carrier plate (70) and a bolt (82) threadedly connected to the fixing block (81), the bolt (82) being used to abut against the battery (2).

10. The explosion-proof testing device according to any one of claims 1 to 6, characterized in that: The heating element (40) is in sheet form and is attached to the outer surface of the battery (2); The housing (1) is provided with a safety valve (17); The outer portion of the housing (1) is provided with an outwardly protruding ring-shaped or hook-shaped connecting piece (18); The bottom of the housing (1) is provided with casters; The strength of the material of the outer shell (1) is greater than the strength of the material of the plate (30) to be tested, and the material of the outer shell (1) is a metal material.

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