Battery watertight test device

Abstract

The utility model provides a battery watertight test device, which comprises a test box and a clamp, and is characterized in that the test box comprises a transparent part, a closed cavity for testing is formed in the test box, and a gas injection port is formed in the test box; the clamp is arranged in the cavity and used for fixing the battery to be tested to the test box, and an observation opening used for exposing a battery liquid injection hole is formed in the clamp. A closed structure is formed through the test box, and test personnel are prevented from being hurt in the watertight test process. By arranging the observation port on the clamp and combining the transparent part on the test box, a tester can conveniently observe the test condition outside the test box so as to judge whether the air tightness of the battery is good or not.

Description

Technical Field

[0001] The present application relates to battery testing technology, and in particular to a battery watertightness testing device. Background Art

[0002] As environmental and energy issues become increasingly prominent, the new energy industry is ushering in a golden period of vigorous development. As an important part of the new energy industry, battery technology innovation is changing with each passing day, constantly promoting the progress and upgrading of the industry. Batteries need to undergo a series of tests before leaving the factory to ensure the safety, reliability and service life of the battery. Among them, the watertight test is a method used to detect the sealing performance of the battery shell, which is an important part of the battery pre-shipment test.

[0003] In the scheme of the related technology, the electrolyte in the battery needs to be discharged before the watertight test. During the watertight test, the battery is placed in an open container filled with water. After the battery is immersed in water, it is inflated through a hose connected to the injection hole on the battery. The airtightness of the battery is judged by observing whether there are bubbles on the surface of the battery.

[0004] However, the solution using related technologies has great potential safety hazards when conducting watertight tests on batteries, which can easily cause personal injury to test personnel. Utility Model Content

[0005] In order to overcome the above-mentioned defects in the related art, the purpose of the present application is to provide a battery watertightness test device, which is used to improve the safety of battery watertightness test and avoid personal injury to test personnel.

[0006] The present application provides a battery watertightness test device, comprising:

[0007] A test box, the test box comprising a transparent portion, a closed cavity for conducting a test formed inside the test box, and a gas injection port being provided on the test box;

[0008] A clamp is arranged in the cavity, the clamp is used to fix the battery to be tested on the test box, and the clamp is provided with an observation port for revealing the battery injection hole.

[0009] In a possible implementation, the test box is an acrylic box;

[0010] The test box comprises a box body and a cover plate. The box body is provided with an opening. The cover plate is arranged on the opening to enclose the cavity together with the box body.

[0011] In a possible implementation, one end of the cover plate is hinged to the box body;

[0012] The cover plate is also provided with a handle.

[0013] In a possible implementation, the fixture includes a first clamping plate and a second clamping plate that are arranged opposite to each other, the first clamping plate and the second clamping plate are detachably connected via a fastener, and the battery to be tested is arranged between the first clamping plate and the second clamping plate.

[0014] In a possible implementation, one of the first clamping plate and the second clamping plate is provided with a plurality of through holes, and the other is provided with a plurality of threaded holes, and the plurality of through holes correspond one to one with the plurality of threaded holes; the fastener comprises a screw or a bolt, and the fastener passes through the through holes and is threadedly connected with the corresponding threaded holes.

[0015] In a possible implementation, the clamp is further provided with a second observation port, and the first observation port and the second observation port are respectively provided near two ends of the clamp;

[0016] The first observation port includes a first sub-observation port provided on the first clamping plate and a second sub-observation port provided on the second clamping plate, and the first sub-observation port corresponds to the second sub-observation port;

[0017] The second observation port includes a third sub-observation port provided on the first clamping plate and a fourth sub-observation port provided on the second clamping plate, and the third sub-observation port corresponds to the fourth sub-observation port.

[0018] In a possible implementation, a plurality of first hand-avoiding grooves are further provided on the first clamping plate, and a plurality of second hand-avoiding grooves are further provided on the second clamping plate, and the plurality of first hand-avoiding grooves and the plurality of second hand-avoiding grooves correspond one to one.

[0019] In a possible implementation, a first support and a second support are further provided in the cavity, the first end of the clamp is connected to the first support via a first rotating shaft, and the second end of the clamp is connected to the second support via a second rotating shaft.

[0020] In a possible implementation, two ends of the first rotating shaft are detachably connected to the first support and the clamp respectively;

[0021] Two ends of the second rotating shaft are detachably connected to the second support and the clamp respectively.

[0022] In a possible implementation, a first shaft groove is provided on the first support, and the first end of the first shaft is placed in the first shaft groove; a first threaded hole is provided at the first end of the clamp, and a first threaded section is provided at the second end of the first shaft, and the second end of the first shaft is threadedly connected to the first threaded hole through the first threaded section;

[0023] A second shaft groove is provided on the second support, and the second end of the second shaft is arranged in the second shaft groove; a second threaded hole is provided at the second end of the clamp, and a second threaded section is provided at the first end of the second shaft, and the first end of the second shaft is threadedly connected to the second threaded hole through the second threaded section.

[0024] The present application provides a battery watertightness test device, including a test box and a fixture. The test box includes a transparent portion, a closed cavity for testing is formed inside the test box, and a gas injection port is provided on the test box; a fixture is arranged in the cavity, and the fixture is used to fix the battery to be tested in the test box, and the fixture is provided with an observation port for revealing the battery injection hole. The present application forms a closed structure through the test box to prevent the test personnel from being injured during the watertightness test. By providing an observation port on the fixture, combined with the transparent portion on the test box, it is convenient for the test personnel to observe the test situation outside the test box to determine whether the airtightness of the battery is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A simplified structural diagram of a battery watertightness test device provided in one embodiment of the present application;

[0027] Figure 2 for Figure 1 A simplified structural diagram after the cover plate is hidden;

[0028] Figure 3 for Figure 1 The structural diagram after the test chamber is hidden;

[0029] Figure 4 for Figure 3 A simplified structural diagram after the first clamping plate and the battery to be tested are hidden;

[0030] Figure 5 A simplified structural diagram of a first splint provided in one embodiment of the present application;

[0031] Figure 6 A simplified structural diagram of a second splint provided in one embodiment of the present application;

[0032] Figure 7 A simplified structural diagram of a first support provided in one embodiment of the present application;

[0033] Figure 8 A simplified structural diagram of a second support provided in one embodiment of the present application.

[0034] Reference numerals:

[0035] 10-battery to be tested; 11-battery filling hole;

[0036] 100-test chamber;

[0037] 110-box body; 111-opening;

[0038] 120-cover plate; 121-gas injection port; 122-hinge; 123-handle;

[0039] 200- fixture; 201- first observation port; 2011- first sub-observation port; 2012- second sub-observation port; 202- second observation port; 2021- third sub-observation port; 2022- fourth sub-observation port;

[0040] 210-first clamping plate; 211-through hole; 212-first hand-hiding groove; 213-first half hole; 214-third half hole;

[0041] 220-second clamping plate; 221-threaded hole; 222-second hand-hiding groove; 223-second half hole; 224-fourth half hole;

[0042] 300 - first support; 310 - first shaft groove; 311 - first guide portion;

[0043] 400 - second support; 410 - second shaft groove; 411 - second guide portion;

[0044] 500-first rotating shaft;

[0045] 600- Second rotating shaft. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0047] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0048] As described in the background technology, the watertightness test in the solution of the related technology has great safety hazards, which may easily cause personal injury to the test personnel. The reason for the above problems is that the container used in the battery watertightness test is in an open state, and the battery swells and may rupture after being inflated during the test. The splashes generated during the rupture may cause personal injury to the test personnel. In addition, some electrolyte may remain inside the battery during the watertightness test, and the residual electrolyte in the battery may be mixed into the water during the test. The test personnel may suffer skin damage after contacting the water mixed with the electrolyte.

[0049] In view of this, the embodiment of the present application aims to provide a battery watertightness test device, which forms a closed structure by setting a transparent test box to prevent the test personnel from being injured during the watertightness test. In addition, an observation port is set on the fixture in the test box, and combined with the transparent test box, it is convenient for the test personnel to observe the test situation outside the test box to judge whether the airtightness of the battery is good.

[0050] The contents of the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can understand the contents of the present application in more detail.

[0051] Figure 1 A simplified structural diagram of a battery watertightness test device provided in one embodiment of the present application. Figure 2 for Figure 1 The structural diagram after the cover is hidden. Figure 3 for Figure 1 The structural diagram after the test chamber is hidden. Figure 4 for Figure 3 The schematic diagram of the structure after the first clamping plate and the battery to be tested are hidden. Figure 5 This is a simplified structural diagram of a first splint provided in one embodiment of the present application. Figure 6 This is a simplified structural diagram of the second splint provided in one embodiment of the present application. Figure 7 A simplified structural diagram of a first support provided in an embodiment of the present application, Figure 8 A simplified structural diagram of a second support provided in one embodiment of the present application.

[0052] Please refer to Figure 1-Figure 2 This embodiment provides a battery watertightness test device, including:

[0053] The test box 100 includes a transparent portion so that the test personnel can observe the situation in the test box at any time. A closed cavity for testing is formed in the test box 100, and the watertight test is performed in the cavity, so that the battery 10 to be tested can be isolated by the test box 100 to prevent the test personnel from being injured during the watertight test. The test box 100 is provided with a gas injection port 121, which is used to allow an air pipe (for example, a hose) connected to an external air source to pass through, so as to inflate the interior of the battery 10 to be tested for a watertight test.

[0054] It should be noted that in this embodiment, the entire body of the test box 100 can be transparent, or the transparent portion can be any surface of the test box 100 or a partial area on the surface. For example, one or both sides of the test box 100 facing the operator can be transparent, or the top surface of the test box 100 can be transparent. In the embodiment of the present application, the test box 100 can be selected according to needs to be fully transparent, partially transparent, and have a specific size range of the transparent portion.

[0055] The fixture 200 is arranged in the cavity. The fixture 200 is used to fix the battery 10 to be tested to the test box 100, so as to ensure the stability of the battery during the test. The fixture 200 of this embodiment can be directly fixed on the test box 100; or, a corresponding supporting mechanism can be arranged in the test box 100, and the fixture 200 can be fixed on the supporting mechanism. In this embodiment, the fixture 200 is provided with a first observation port 201 for exposing the battery injection hole 11, so that the test personnel can check the test situation at any time through the first observation port 201. During the test, the air pipe passing through the air injection port 121 and entering the cavity can be first connected to the perforated rubber nail, and then connected to the battery injection hole 11 through the perforated rubber nail, so that the air pipe does not directly contact the battery injection hole 11, and the rigid friction between the air pipe and the battery injection hole 11 is reduced while increasing the sealing, so as to improve the service life of the battery injection hole 11.

[0056] It can be seen from the above description that the present embodiment forms a closed structure by setting a transparent test box 100 to prevent the test personnel from being hurt during the watertight test. By setting a first observation port 201 on the fixture 200 and combining it with the transparent test box 100, it is convenient for the test personnel to observe the test situation outside the test box 100 to judge whether the airtightness of the battery is good. Specifically, a certain amount of water can be filled into the cavity of the test box 100, and the fixture 200 and the battery 10 to be tested can be placed in the water and the battery can be inflated. The airtightness of the battery can be judged by observing the generation of bubbles in the water; if no bubbles are generated in the water during the watertight test, it means that the airtightness of the surface battery is good; if bubbles are present in the water during the watertight test, it indicates that the airtightness of the battery at this position is poor.

[0057] In this embodiment, the shape of the test box 100 can be set as needed, for example, it can be prism-shaped or cylindrical, etc. For example, the test box 100 can be in the shape of a quadrangular prism. The size of the test box 100 can be set according to parameters such as the size of the battery 10 to be tested.

[0058] The test box 100 of this embodiment can be an acrylic box. The use of acrylic material can ensure that the test box 100 has good transparency, so that the test personnel can observe the test conditions inside. At the same time, the acrylic material also has a light weight and good strength, which is easy to carry and can withstand the impact generated during the test.

[0059] It is understandable that the test box 100 of this embodiment may also be made of other transparent materials, such as polycarbonate, polystyrene, polyester board, etc.

[0060] like Figure 1 and Figure 2 As shown, in a possible implementation, the test box 100 of this embodiment includes a box body 110 and a cover plate 120, and the box body 110 is provided with an opening 111, and the opening 111 can be set at the top of the box body 110, so as to facilitate the battery 10 to be tested to be placed in the cavity or taken out from the cavity through the opening 111. The opening 111 is set at the top of the box body 110, and the space inside the box body 110 can also be guaranteed, so that the box body 110 can be filled with enough water to meet the requirements of the watertight test. The cover plate 120 of this embodiment is covered on the opening 111 to enclose a cavity together with the box body 110. The cover plate 120 can be abutted or detachably connected to the box body 110, so as to facilitate the exposure or shielding of the opening 111. The gas injection port 121 can be set at one end of the cover plate 120, for example, it can be set at one end close to the battery injection hole 11, so as to inflate the battery.

[0061] Furthermore, one end of the cover plate 120 in this embodiment is hinged to the box body 110, so as to facilitate the opening or closing of the cover plate 120. Exemplarily, the cover plate 120 in this embodiment can be hinged to the box body 110 through a plurality of hinges 122. Specifically, the first adapter plate of the hinge 122 is fixedly connected to the side wall of the box body 110, the second adapter plate of the hinge 122 is fixedly connected to the cover plate 120, and the first adapter plate and the second adapter plate are both sleeved on the rotating shaft, and the cover plate 120 and the box body 110 are hinged through the rotating shaft. Of course, in some examples, the cover plate 120 and the box body 110 can also be hinged or rotatably connected by a hinge.

[0062] Optionally, the cover plate 120 of this embodiment is further provided with a handle 123, which can be provided, for example, on a side away from the hinge 122, so as to facilitate the tester to open or close the cover plate 120. The number of handles 123 can be one or more, for example Figure 1 In the embodiment, two handles 123 are provided.

[0063] In this embodiment, the cover 120 can be formed by a whole plate, or the cover 120 can be composed of multiple plates. When the cover 120 includes multiple plates, each plate can be hinged to the box body 110, and a handle 123 can be provided on each plate to facilitate opening.

[0064] Please continue to refer to Figure 2-Figure 3 The fixture 200 of this embodiment includes a first clamping plate 210 and a second clamping plate 220 that are arranged opposite to each other. The first clamping plate 210 and the second clamping plate 220 are detachably connected by fasteners. The battery 10 to be tested is arranged between the first clamping plate 210 and the second clamping plate 220. After being fixed by the fasteners, the first clamping plate 210 and the second clamping plate 220 can firmly fix the battery 10 to be tested in the fixture 200 to ensure the stability of the battery during the test. In this embodiment, the first clamping plate 210 and the second clamping plate 220 can both be made of steel plates, and the steel plates can be steel plates, so as to ensure that they have good strength. The first clamping plate 210 and the second clamping plate 220 are arranged in a detachable connection structure to facilitate the test personnel to install and remove the battery.

[0065] Optionally, in this embodiment, one of the first clamping plate 210 and the second clamping plate 220 is provided with a plurality of through holes 211, and the other is provided with a plurality of threaded holes 221, and the plurality of through holes 211 correspond to the plurality of threaded holes 221 one by one. The fastener includes a screw or a bolt, and the fastener passes through the through hole 211 and is threadedly connected with the corresponding threaded hole 221. The detachable connection between the first clamping plate 210 and the second clamping plate 220 can be achieved by disassembling the fastener. Exemplarily, in this embodiment, the through hole 211 can be provided on the first clamping plate 210, and the threaded hole 221 can be provided on the second clamping plate 220; the specific number of the through hole 211 and the threaded hole 221 can be set as required.

[0066] In this embodiment, the fixture 200 is further provided with a second observation port 202, and the first observation port 201 and the second observation port 202 are respectively provided near the two ends of the fixture 200. The first observation port 201 and the second observation port 202 can respectively expose the two ends of the battery 10 to be tested, so as to facilitate the test personnel to observe the conditions of the two ends of the battery during the test.

[0067] Specifically, the first observation port 201 of the present embodiment includes a first sub-observation port 2011 arranged on the first clamping plate 210 and a second sub-observation port 2012 arranged on the second clamping plate 220. The first sub-observation port 2011 corresponds to the second sub-observation port 2012. After the first clamping plate 210 and the second clamping plate 220 are fixedly connected, the first sub-observation port 2011 and the second sub-observation port 2012 together constitute the first observation port 201, so that the test personnel can observe the situation of the area near the battery filling hole 11 during the test from both sides.

[0068] The second observation port 202 includes a third sub-observation port 2021 arranged on the first clamping plate 210 and a fourth sub-observation port 2022 arranged on the second clamping plate 220. The third sub-observation port 2021 corresponds to the fourth sub-observation port 2022. After the first clamping plate 210 and the second clamping plate 220 are fixedly connected, the third sub-observation port 2021 and the fourth sub-observation port 2022 together constitute the second observation port 202, so that the test personnel can observe the situation of the battery end during the test from both sides.

[0069] Furthermore, the first clamping plate 210 of the present embodiment is provided with a plurality of first hand-avoiding grooves 212 , and the second clamping plate 220 is provided with a plurality of second hand-avoiding grooves 222 , and the plurality of first hand-avoiding grooves 212 and the plurality of second hand-avoiding grooves 222 correspond one to one.

[0070] In this embodiment, the first hand-avoiding groove 212 and the second hand-avoiding groove 222 are provided to facilitate the test personnel to hold the battery to be tested 10, so as to put the battery to be tested 10 into the fixture 200 or take it out of the fixture 200. In addition, the first hand-avoiding groove 212 and the second hand-avoiding groove 222 can also reveal the structure of part of the battery to be tested 10 during the test process, so as to increase the observation area and facilitate the test personnel to better understand the situation of the battery during the watertight test.

[0071] Please continue to refer to Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 In this embodiment, a first support 300 and a second support 400 are further provided in the cavity, a first end of the clamp 200 is connected to the first support 300 via a first rotating shaft 500, and a second end of the clamp 200 is connected to the second support 400 via a second rotating shaft 600. In this embodiment, the first support 300, the first rotating shaft 500, the second support 400 and the second rotating shaft 600 are provided to fix the two ends of the clamp 200 to the first support 300 and the second support 400, respectively, so as to achieve the fixation of the clamp in the cavity.

[0072] Specifically, the two ends of the first rotating shaft 500 of the present embodiment are detachably connected to the first support 300 and the clamp 200 respectively; the two ends of the second rotating shaft 600 are detachably connected to the second support 400 and the clamp 200 respectively, so that the first rotating shaft 500 and the second rotating shaft 600 of different lengths can be replaced according to the size of the battery 10 to be tested, so as to adapt to batteries of different sizes.

[0073] In this embodiment, a first shaft groove 310 is provided on the first support 300, and the first end of the first shaft 500 is placed in the first shaft groove 310. A first guide portion 311 may be provided near the opening of the first shaft groove 310 to guide the first shaft 500 when it is installed, so that the first shaft 500 can enter the first shaft groove 310 better.

[0074] The first end of the clamp 200 is provided with a first threaded hole, the second end of the first rotating shaft 500 is provided with a first threaded section, and the second end of the first rotating shaft 500 is threadedly connected to the first threaded hole through the first threaded section. Optionally, the first clamping plate 210 of this embodiment is provided with a first half hole 213, and the second clamping plate 220 is provided with a corresponding second half hole 223. After the first clamping plate 210 and the second clamping plate 220 are fixedly connected, the first half hole 213 and the second half hole 223 together form a first threaded hole.

[0075] Similarly, the second support 400 of this embodiment is provided with a second shaft groove 410, and the second end of the second shaft 600 is placed in the second shaft groove 410. A second guide portion 411 may be provided near the opening of the second shaft groove 410 to guide the second shaft 600 when it is installed, so that the second shaft 600 can enter the second shaft groove 410 better.

[0076] The second end of the clamp 200 is provided with a second threaded hole, the first end of the second rotating shaft 600 is provided with a second threaded section, and the first end of the second rotating shaft 600 is threadedly connected to the second threaded hole through the second threaded section. Optionally, the first clamping plate 210 of this embodiment is provided with a third half hole 214, and the second clamping plate 220 is provided with a corresponding fourth half hole 224. After the first clamping plate 210 and the second clamping plate 220 are fixedly connected, the third half hole 214 and the fourth half hole 224 together form a second threaded hole.

[0077] In addition, a driving mechanism may be provided in this embodiment, and the output end of the driving mechanism is connected to the fixture 200 to drive the fixture 200 to rotate in the cavity, so that the test personnel can observe the conditions of the battery 10 to be tested during the test from different angles.

[0078] 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", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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.

[0079] 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 directly connected or indirectly connected 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.

[0080] It should be noted that in the description of this application, the terms "first" and "second" are only used to facilitate the description of different components, and cannot be understood as indicating or implying a sequential relationship, 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 at least one of the features.

[0081] The various embodiments or implementation methods in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0082] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery watertightness test device, characterized in that: include: A test box (100), the test box (100) comprising a transparent portion, a closed cavity for conducting a test formed inside the test box (100), and a gas injection port (121) being provided on the test box (100); A clamp (200) is arranged in the cavity, the clamp (200) is used to fix the battery (10) to be tested to the test box (100), and the clamp (200) is provided with a first observation port (201) for revealing the battery injection hole (11).

2. The battery watertightness test device according to claim 1, characterized in that: The test box (100) is an acrylic box; The test box (100) comprises a box body (110) and a cover plate (120); the box body (110) is provided with an opening (111); the cover plate (120) is covered on the opening (111) to enclose the cavity together with the box body (110).

3. The battery watertightness test device according to claim 2, characterized in that: One end of the cover plate (120) is hinged to the box body (110); The cover plate (120) is also provided with a handle (123).

4. The battery watertightness test device according to any one of claims 1 to 3, characterized in that: The clamp (200) comprises a first clamp (210) and a second clamp (220) which are arranged opposite to each other, the first clamp (210) and the second clamp (220) are detachably connected via a fastener, and the battery (10) to be tested is arranged between the first clamp (210) and the second clamp (220).

5. The battery watertightness test device according to claim 4, characterized in that: One of the first clamping plate (210) and the second clamping plate (220) is provided with a plurality of through holes (211), and the other is provided with a plurality of threaded holes (221), and the plurality of through holes (211) corresponds to the plurality of threaded holes (221) one by one; the fastener comprises a screw or a bolt, and the fastener passes through the through holes (211) and is threadedly connected with the corresponding threaded holes (221).

6. The battery watertightness test device according to claim 5, characterized in that: The clamp (200) is also provided with a second observation port (202), and the first observation port (201) and the second observation port (202) are respectively arranged near two ends of the clamp (200); The first observation port (201) comprises a first sub-observation port (2011) arranged on the first clamping plate (210) and a second sub-observation port (2012) arranged on the second clamping plate (220), and the first sub-observation port (2011) corresponds to the second sub-observation port (2012); The second observation port (202) comprises a third sub-observation port (2021) arranged on the first clamping plate (210) and a fourth sub-observation port (2022) arranged on the second clamping plate (220), and the third sub-observation port (2021) corresponds to the fourth sub-observation port (2022).

7. The battery watertightness test device according to claim 4, characterized in that: The first clamping plate (210) is also provided with a plurality of first hand-avoiding grooves (212), and the second clamping plate (220) is also provided with a plurality of second hand-avoiding grooves (222), and the plurality of first hand-avoiding grooves (212) and the plurality of second hand-avoiding grooves (222) correspond one to one.

8. The battery watertightness test device according to any one of claims 1 to 3, characterized in that: A first support (300) and a second support (400) are also provided in the cavity; the first end of the clamp (200) is connected to the first support (300) via a first rotating shaft (500), and the second end of the clamp (200) is connected to the second support (400) via a second rotating shaft (600).

9. The battery watertightness test device according to claim 8, characterized in that: Both ends of the first rotating shaft (500) are detachably connected to the first support (300) and the clamp (200) respectively; Both ends of the second rotating shaft (600) are detachably connected to the second support (400) and the clamp (200) respectively.

10. The battery watertightness test device according to claim 9, characterized in that: The first support (300) is provided with a first rotating shaft groove (310), and the first end of the first rotating shaft (500) is arranged in the first rotating shaft groove (310); the first end of the clamp (200) is provided with a first threaded hole, and the second end of the first rotating shaft (500) is provided with a first threaded section, and the second end of the first rotating shaft (500) is threadedly connected to the first threaded hole through the first threaded section; The second support (400) is provided with a second rotating shaft groove (410), and the second end of the second rotating shaft (600) is arranged in the second rotating shaft groove (410); the second end of the clamp (200) is provided with a second threaded hole, and the first end of the second rotating shaft (600) is provided with a second threaded section, and the first end of the second rotating shaft (600) is threadedly connected to the second threaded hole through the second threaded section.

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