Air tightness test tool

Abstract

The embodiment of the invention discloses an air tightness test tool. The air tightness test tool comprises a tool upper cover and a tool base, one side, close to the test piece sample, of the tool upper cover is provided with at least one first cavity; an opening of the first cavity is close to the test piece sample; one side, close to the test piece sample, of the tool base is provided with at least one second cavity, and an opening of the second cavity is close to the test piece sample; the test piece sample is provided with at least one first through hole penetrating through the test piece sample, a first fastener for sealing and fixing the test piece sample is arranged in the first through hole, one end of the first fastener is close to the first cavity, and the other end of the first fastener is close to the second cavity; the air tightness test tool is configured to test the air tightness of the first through hole, so that the reliable air tightness test can be carried out on the sealed and fixed part of the battery, and the purpose of accurately testing the air tightness of the battery is achieved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an airtightness testing tool. Background Art

[0002] The sealing of the battery pack is an important factor in ensuring its safety and performance, and it plays a key role in the safe operation and protection of the battery module. If the sealing of the battery pack is poor, the performance of the battery pack will be reduced, and it is also prone to frequent failures. Therefore, the sealing test of the battery pack is a key step to ensure the safety and service life of the battery pack. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present application provides an airtightness testing tool that can perform reliability airtightness testing on the sealing and fixing parts of a battery, thereby accurately testing the airtightness of the battery.

[0004] In order to solve the above problems, the present application provides an airtightness test tool, which includes:

[0005] A tooling upper cover, wherein at least one first cavity is provided on a side of the tooling upper cover close to the test piece sample; an opening of the first cavity is close to the test piece sample;

[0006] A tool base, wherein at least one second cavity is provided on a side of the tool base close to the test piece sample, and an opening of the second cavity is close to the test piece sample;

[0007] The test piece sample is provided with at least one first through hole penetrating the test piece sample, a first fastener for sealing and fixing the test piece sample is provided in the first through hole, one end of the first fastener is close to the first cavity, and the other end of the first fastener is close to the second cavity;

[0008] The airtightness testing tool is configured to test the airtightness at the first through hole.

[0009] Furthermore, in the airtightness test tool provided in the present application, the test piece sample is arranged between the tool cover and the tool base.

[0010] Further, in the airtightness test tool provided in the present application, the test piece sample includes a box cover simulation piece and a box body simulation piece;

[0011] The box cover simulation component and the box body simulation component are fixedly connected by a first fastener.

[0012] Furthermore, in the airtightness test tool provided in the present application, the test piece sample also includes a sealing piece;

[0013] The sealing member is arranged between the box cover simulation member and the box body simulation member, and the first through hole passes through the box cover simulation member, the sealing member and the box body simulation member in sequence.

[0014] Furthermore, in the airtightness test tool provided in the present application, the first fastener includes a bolt and a rivet nut;

[0015] Among them, the bolts and the rivet nuts seal and fix the box cover simulation component and the box body simulation component at the first through hole.

[0016] Furthermore, in the air tightness testing tool provided in the present application, sealant is filled between the first fastener and the inner wall of the first through hole.

[0017] Furthermore, in the airtightness test tooling provided in the present application, the box cover simulation is configured to simulate the first contact portion of the box cover, and the box body simulation is configured to simulate the second contact portion of the box body; the first contact portion and the second contact portion are fixedly connected to achieve a fixed connection between the box cover and the box body.

[0018] Furthermore, in the airtightness test tool provided in the present application, a plurality of first cavities are provided on the tool cover, and the first cavities are not connected to each other; or / and,

[0019] The tooling base is provided with a plurality of second cavities, and the second cavities are not connected to each other.

[0020] Further, in the airtightness test tool provided in the present application, a first airtightness adapter is provided on a side of the tool cover away from the first cavity, and the first airtightness adapter is connected to the first cavity; or / and,

[0021] A second airtight adapter is provided on a side of the tooling base away from the second cavity, and the second airtight adapter is connected to the first cavity; or / and,

[0022] A first groove is provided on one side of the tooling upper cover close to the test piece sample, and a second sealing member is placed in the first groove and is arranged around the first cavity; or / and,

[0023] A second groove is provided on one side of the tooling base close to the test piece sample, and a second sealing member is placed in the second groove and is arranged around the second cavity; or / and,

[0024] Furthermore, in the airtightness test tool provided in the present application, a handle is provided on a side of the tool cover away from the test piece sample, and the handle is fixedly connected to the tool cover; or / and,

[0025] The tooling upper cover and the tooling base are fixedly connected by a second fastener.

[0026] The airtightness test tool provided in the present application includes a tool cover and a tool base; at least one first cavity is provided on the side of the tool cover close to the test piece sample; the opening of the first cavity is close to the test piece sample; at least one second cavity is provided on the side of the tool base close to the test piece sample, and the opening of the second cavity is close to the test piece sample; the test piece sample is provided with at least one first through hole penetrating the test piece sample, and a first fastener for sealing and fixing the test piece sample is provided in the first through hole, one end of the first fastener is close to the first cavity, and the other end of the first fastener is close to the second cavity; the airtightness test tool is configured to test the airtightness at the first through hole, so as to achieve the reliability airtightness test of the sealed fixing part of the battery, so as to achieve the purpose of accurately testing the airtightness of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. 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.

[0028] Figure 1 A first structural schematic diagram of the airtightness test tool provided in an embodiment of the present application;

[0029] Figure 2 A second structural schematic diagram of the airtightness test tool provided in an embodiment of the present application;

[0030] Figure 3 A third structural schematic diagram of the airtightness test tool provided in an embodiment of the present application;

[0031] Figure 4 A fourth structural schematic diagram of the airtightness test tool provided in an embodiment of the present application;

[0032] Figure 5 A fifth structural schematic diagram of the airtightness test tool provided in an embodiment of the present application;

[0033] Figure 6 A first structural schematic diagram of a test piece sample provided in an embodiment of the present application;

[0034] Figure 7 A second structural schematic diagram of a test piece sample provided in an embodiment of the present application;

[0035] Figure 8 A schematic diagram of the structure of a box cover simulation member provided in an embodiment of the present application;

[0036] Fig. 9 A schematic diagram of the structure of a box simulation component provided in an embodiment of the present application;

[0037] Fig.10 A schematic diagram of the structure of a seal provided in an embodiment of the present application;

[0038] Fig.11 A first structural schematic diagram of a tooling upper cover provided in an embodiment of the present application;

[0039] Fig.12 A second structural schematic diagram of the tooling upper cover provided in an embodiment of the present application;

[0040] Fig.13 A first structural schematic diagram of a tooling base provided in an embodiment of the present application;

[0041] Fig.14 A second structural schematic diagram of the tooling base provided in an embodiment of the present application.

[0042] Reference numerals:

[0043] 10 is a tooling cover, 101 is a first cavity, 102 is a first airtight adapter, 103 is a first groove, 104 is a second through hole, 105 is a handle, 20 is a test piece sample, 201 is a first through hole, 202 is a first fastener, 2021 is a bolt, 2022 is a rivet nut, 203 is a box cover simulation, 204 is a box body simulation, 205 is a sealing member, 30 is a tooling base, 301 is a second cavity, 302 is a second airtight adapter, 303 is a second groove, and 304 is a third through hole. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0046] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0047] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0048] In addition, in this application, unless otherwise clearly specified or limited in the embodiments, the terms "installed", "connected", "connected" and "fixed" etc. appearing in the embodiments should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integrated connection. It can be understood that it can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or 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 the specific implementation situation.

[0049] In the related art, the battery pack body and the cover are sealed and fixed using silicone, sealing cotton, bolts and rivet nuts. The sealing cotton is arranged between the body and the cover, the rivet nuts are fixedly connected to the bolts to fix the body and the cover together, and the silicone is used to fill the gap between the bolts and the cover, as well as the gap between the rivet nuts and the body, thereby fixing the body and the cover.

[0050] In order to verify the reliability of the seal between the battery pack box and the box cover, an airtightness test is usually required. However, the battery pack airtightness test cycle is long, the material size is large, and the test requires a lot of manpower, equipment, and space, which is not conducive to quickly verifying whether the components meet the requirements. Therefore, it is necessary to design a small module to verify the reliability of the battery pack seal.

[0051] In one embodiment, Figure 1 As shown, in order to test the airtightness between the box body and the box cover after sealing and fixing with silicone, sealing cotton, bolts and rivet nuts, the bolts and rivet nuts are usually riveted on the sheet metal and placed in a cavity with an opening. At the same time, silicone is filled in the gap between the bolt and the sheet metal, and the gap between the rivet nut and the sheet metal to form a test piece sample, and then an airtightness testing device is used to inflate the cavity to test the airtightness.

[0052] However, due to the gap between the bolt and the sheet metal, and the gap between the rivet nut and the sheet metal filled with silicone, when the test piece sample is detected to be leaking, it is impossible to know whether the cause of the leakage is the sealing formed by the bolt and the rivet nut, or the sealing of the silicone. At the same time, since there are multiple groups of bolts and rivet nuts and they are all arranged in the cavity, when it is determined that it is caused by the sealing between the bolt and the rivet nut, it is necessary to spray soapy water or inject water, and use whether bubbles are generated to determine the specific bolts and rivet nuts. This is not only inefficient and not conducive to mass testing, but also has poor accuracy.

[0053] To this end, the present application provides an airtightness test tool, which includes a tool cover and a tool base; at least one first cavity is provided on the side of the tool cover close to the test piece sample; the opening of the first cavity is close to the test piece sample; at least one second cavity is provided on the side of the tool base close to the test piece sample, and the opening of the second cavity is close to the test piece sample; the test piece sample is provided with at least one first through hole penetrating the test piece sample, and a first fastener for sealing and fixing the test piece sample is provided in the first through hole, one end of the first fastener is close to the first cavity, and the other end of the first fastener is close to the second cavity; the airtightness test tool is configured to test the airtightness at the first through hole, so as to achieve the reliability airtightness test of the sealed fixing part of the battery, so as to achieve the purpose of accurately testing the airtightness of the battery.

[0054] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Fig.10 , Fig.11 , Fig.12 , Fig.13 and Fig.14 As shown, the present application provides an airtightness test tool, which includes:

[0055] The tool cover 10 has at least one first cavity 101 on one side of the tool cover 10 close to the test piece sample 20; the opening of the first cavity 101 is close to the test piece sample 20;

[0056] A tool base 30 , wherein at least one second cavity 301 is provided on a side of the tool base 30 close to the test piece sample 20 , and an opening of the second cavity 301 is close to the test piece sample 20 ;

[0057] The test piece sample 20 is provided with at least one first through hole 201 penetrating the test piece sample 20, and a first fastener 202 is provided in the first through hole 201 to seal and fix the test piece sample 20, one end of the first fastener 202 is close to the first cavity 101, and the other end of the first fastener 202 is close to the second cavity 301;

[0058] The airtightness testing tool is configured to test the airtightness at the first through hole 201 .

[0059] In this embodiment, the test piece sample 20 can be understood as the box body of the battery pack, or as the box cover of the battery pack, or as the sealing cotton between the box body and the box cover of the battery pack, or as the box body and the box cover of the battery pack, but is not limited to this.

[0060] The first fastener 202 can be understood as a bolt 2021, or as a rivet nut 2022, or as a bolt 2021 and a sealant, or as a rivet nut 2022 and a sealant, or as a bolt 2021, a rivet nut 2022 and a sealant, but is not limited thereto.

[0061] Exemplarily, when it is necessary to test the sealing between the first through hole 201 and the bolt 2021 at the box cover of the battery pack, the test piece sample 20 can be a sheet metal inlaid with the bolt 2021, and the first through hole 201 and the bolt 2021 are filled with sealant. At this time, the simulation part can be arranged between the tooling cover 10 and the tooling base 30, and the first cavity 101 is inflated, and then the air pressure of the second cavity 301 is detected to determine the sealing performance of the sealant; or the second cavity 301 is inflated, and then the air pressure of the first cavity 101 is detected to determine the sealing performance of the sealant.

[0062] Exemplarily, when it is necessary to test the sealing between the first through hole 201 and the rivet nut 2022 in the box of the battery pack, the test piece sample 20 can be a sheet metal inlaid with the rivet nut 2022, and the first through hole 201 and the rivet nut 2022 are filled with sealant. At this time, the simulation part can be arranged between the tooling cover 10 and the tooling base 30, and the first cavity 101 can be inflated, and then the air pressure in the second cavity 301 is detected to determine the sealing performance of the sealant; or the second cavity 301 can be inflated, and then the air pressure in the first cavity 101 is detected to determine the sealing performance of the sealant.

[0063] Exemplarily, when it is necessary to test the sealing performance of the battery pack body and the cover after being fixed with bolts 2021 and rivet nuts 2022, the test piece sample 20 includes two sheet metals, one sheet metal is inlaid with bolts 2021, and the other sheet metal is inlaid with rivet nuts 2022. After the two sheet metals are fixed with bolts 2021 and rivet nuts 2022, they can be arranged between the tooling upper cover 10 and the tooling base 30, and the first cavity 101 can be inflated with air, and then the air pressure in the second cavity 301 is detected to determine the sealing performance of the sealant; or the second cavity 301 can be inflated with air, and then the air pressure in the first cavity 101 is detected to determine the sealing performance of the bolts 2021 and the rivet nuts 2022.

[0064] Exemplarily, when it is necessary to test the sealing performance of the sealing cotton between the case and the cover of the battery pack, two sheet metals can be used to simulate the case and the cover of the battery pack respectively. After the sealing cotton is arranged between the two sheet metals, one end of the first through hole 201 is sealed, and the other end is connected to the first cavity 101 or the second cavity 301, and is arranged between the tooling upper cover 10 and the tooling base 30. If the other end of the first through hole 201 is connected to the first cavity 101, the first cavity 101 can be inflated, and then the air pressure of the second cavity 301 is detected to determine the sealing performance of the sealant; if the other end of the first through hole 201 is connected to the second cavity 301, the second cavity 301 can be inflated, and then the air pressure of the first cavity 101 is detected to determine the sealing performance of the sealing cotton.

[0065] It can be seen that the airtightness test tool provided by the present application can effectively test whether the air leakage at the seal of the battery pack is caused by the sealant or by the bolt 2021 and the rivet nut 2022, and thus can quickly identify and verify the performance of the components in the early stage, with less demand for personnel, equipment, materials, and sites, thus saving resources. At the same time, the airtightness test tool provided by the present application can also be inflated in different directions, so that the reliability of different interfaces can be verified at the same time, avoiding multiple disassembly and installation of the tool.

[0066] The airtightness test tool provided in the present application includes a tool cover 10 and a tool base 30; at least one first cavity 101 is provided on the side of the tool cover 10 close to the test piece sample 20; the opening of the first cavity 101 is close to the test piece sample 20; at least one second cavity 301 is provided on the side of the tool base 30 close to the test piece sample 20, and the opening of the second cavity 301 is close to the test piece sample 20; the test piece sample 20 is provided with at least one first through hole 201 penetrating the test piece sample 20, and a first fastener 202 for sealing and fixing the test piece sample 20 is provided in the first through hole 201, one end of the first fastener 202 is close to the first cavity 101, and the other end of the first fastener 202 is close to the second cavity 301; the airtightness test tool is configured to test the airtightness at the first through hole 201, so as to realize the reliability airtightness test of the sealing and fixing part of the battery, so as to achieve the purpose of accurately testing the airtightness of the battery.

[0067] In some embodiments, Figure 2 , Figure 3 , Figure 4 , Figure 5 , Fig.10 , Fig.11 , Fig.12 , Fig.13 and Fig.14 As shown, the test piece sample 20 is arranged between the tooling cover 10 and the tooling base 30 .

[0068] Specifically, the main purpose of this application is to test the sealing performance of the sealing fixing part of the battery pack case and the case cover. Therefore, when the test piece sample 20 is used to simulate the battery pack case and the case cover, the sealing fixing part of the battery pack case and the case cover can be simulated. However, considering that there is also sealing cotton between the battery pack case and the case cover, the test piece sample 20 can be set between the tooling upper cover 10 and the tooling base 30.

[0069] In some embodiments, Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, the test piece sample 20 includes a box cover simulation 203 and a box body simulation 204 ; wherein the box cover simulation 203 and the box body simulation 204 are fixedly connected by a first fastener 202 .

[0070] In this embodiment, the box cover simulation component 203 and the box body simulation component 204 can both be sheet metal, and the first fastener 202 can close the box cover simulation component 203 and the box body simulation component 204 to seal and fix the box cover simulation component 203 and the box body simulation component 204.

[0071] In some embodiments, Figure 4 , Figure 5 , Figure 6 , Figure 7 , Fig.10 As shown, the test piece sample 20 also includes a seal 205; wherein the seal 205 is arranged between the box cover simulation 203 and the box body simulation 204, and the first through hole 201 passes through the box cover simulation 203, the seal 205 and the box body simulation 204 in sequence.

[0072] In this embodiment, the seal 205 can be a sealing cotton between the box body and the box cover of the battery pack. After the seal 205 is arranged between the box cover simulation part 203 and the box body simulation part 204, the bolt 2021 and the rivet nut 2022 can be used to fix the box cover simulation part 203, the seal 205 and the box body simulation part 204 through the first through hole 201.

[0073] In some embodiments, Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, the first fastener 202 includes a bolt 2021 and a rivet nut 2022 ; wherein the bolt 2021 and the rivet nut 2022 seal and fix the box cover simulation component 203 and the box body simulation component 204 at the first through hole 201 .

[0074] In this embodiment, the bolt 2021 is arranged at the box cover simulation part 203, and the rivet nut 2022 is arranged at the box body simulation part 204. When it is necessary to test the air tightness between the bolt 2021 and the rivet nut 2022 (i.e., the air tightness of the first fastener 202), the bolt 2021 and the rivet nut 2022 can be directly fixedly connected to seal and fix the box cover simulation 203 and the box body simulation 204. At this time, there is no need to fill the gap between the bolt 2021 and the box cover simulation 203 with sealant, and there is no need to fill the gap between the rivet nut 2022 and the box body simulation 204 with sealant. The sealed and fixed box cover simulation 203 and the box body simulation 204 can be arranged between the tooling upper cover 10 and the tooling base 30, and the first cavity 101 can be inflated, and then the air pressure of the second cavity 301 can be detected to determine the sealing performance of the sealant; or the second cavity 301 can be inflated, and then the air pressure of the first cavity 101 can be detected to determine the sealing performance of the bolt 2021 and the rivet nut 2022.

[0075] In some embodiments, sealant is filled between the first fastener 202 and the inner wall of the first through hole 201 .

[0076] In some embodiments, the box cover simulation part 203 is configured to simulate the first contact part of the box cover, and the box body simulation part 204 is configured to simulate the second contact part of the box body; the first contact part and the second contact part are fixedly connected to achieve a fixed connection between the box cover and the box body.

[0077] In this embodiment, the box cover simulation part 203 and the box body simulation part 204 can both be sheet metal. The box cover simulation part 203 can be the area where the box cover of the battery pack is sealed and fixedly connected to the box body, that is, the first contact part; the box body simulation part 204 can be the area where the box body of the battery pack is sealed and fixedly connected to the box cover, that is, the second contact part.

[0078] In some embodiments, Fig.11 , Fig.12 , Fig.13 and Fig.14 As shown, the tooling cover 10 is provided with a plurality of first cavities 101 , and the first cavities 101 are not connected to each other; the tooling base 30 is provided with a plurality of second cavities 301 , and the second cavities 301 are not connected to each other.

[0079] In this embodiment, the first fastener 202 can be understood as a group of bolts 2021 and rivet nuts 2022. A group of bolts 2021 and rivet nuts 2022 can correspond to a group of first cavities 101 and second cavities 301, so that the sealing performance of each group of bolts 2021 and rivet nuts 2022 on the body and cover of the battery pack can be tested separately.

[0080] At the same time, each group of first cavities 101 and second cavities 301 can simulate the air tightness test of each group of bolts 2021 and rivet nuts 2022 under different environments, and can also perform air tightness tests after aging in different time periods at the same time, so as to evaluate whether the air tightness of the fasteners remains effective after experiencing corrosion aging. This application can truly reflect the functional performance of fasteners under corrosion aging conditions by simulating the whole package connection state in actual applications, and effectively evaluate the functional failure risk of components under actual application conditions, which has important practical significance for preventing and reducing the performance degradation of fasteners caused by corrosion aging.

[0081] In some embodiments, Figure 2 , Figure 3 , Figure 4 , Figure 5 , Fig.10 , Fig.11 , Fig.12 , Fig.13 and Fig.14 As shown, a first airtight adapter 102 is provided on the side of the tooling cover 10 away from the first cavity 101, and the first airtight adapter 102 is connected to the first cavity 101; a second airtight adapter 302 is provided on the side of the tooling base 30 away from the second cavity 301, and the second airtight adapter 302 is connected to the first cavity 101.

[0082] In this embodiment, the first airtight adapter 102 is configured to inflate the first cavity 101, and the second airtight adapter 302 is configured to inflate the second cavity 301. Both the first airtight adapter 102 and the second airtight adapter 302 can be connected to an external airtightness detection device, and then after the test piece sample 20 is set between the tooling upper cover 10 and the tooling base 30, it can be possible to inflate the first cavity 101 or the second cavity 301, thereby achieving an airtightness test on the sealed fixing part between the box body and the box cover of the battery pack. Among them, each first cavity 101 can be configured with a first airtight adapter 102, and each second cavity 301 can be configured with a second airtight adapter 302.

[0083] In some embodiments, Fig.11 , Fig.12 , Fig.13 and Fig.14 As shown, a first groove 103 is provided on a side of the tooling cover 10 close to the test piece sample 20, and a second sealing member 205 is placed in the first groove 103 and arranged around the first cavity 101; a second groove 303 is provided on a side of the tooling base 30 close to the test piece sample 20, and a second sealing member 205 is placed in the second groove 303 and arranged around the second cavity 301.

[0084] In this embodiment, by placing the second sealing member 205 at the first groove 103 and the second groove 303, the second sealing member 205 may be a sealant, specifically a silicone seal strip, so that after the test piece sample 20 is set between the tooling cover 10 and the tooling base 30, the first cavity 101 and the second cavity 301 can be sealed. At the same time, the number of the first grooves 103 can be equal to the number of the first cavities 101, and the number of the second grooves 303 can be equal to the number of the second cavities 301. The shapes of the first grooves 103 and the second grooves 303 can be annular.

[0085] In some embodiments, Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a handle 105 is provided on the side of the tooling cover 10 away from the test piece sample 20 , and the handle 105 is fixedly connected to the tooling cover 10 .

[0086] In this embodiment, two handles 105 may be provided on the tooling upper cover 10 , and the handles 105 may be provided on the top of the tooling upper cover 10 , so as to conveniently separate the tooling upper cover 10 from the tooling base 30 .

[0087] In some embodiments, Figure 2 , Figure 3 , Figure 4 , Fig.12 and Fig.14 As shown, the tooling upper cover 10 and the tooling base 30 are fixedly connected by a second fastener (not shown in the figure).

[0088] In this embodiment, at least one second through hole 104 is provided at the edge of the tooling cover 10, and at least one third through hole 304 is provided at the edge of the tooling base 30. One second through hole 104 corresponds to one third through hole 304, and a second fastener can sequentially penetrate the second through hole 104 and the third through hole 304 to fix the tooling cover 10 and the tooling base 30. The second fastener can be the same as the first fastener.

[0089] The airtightness test tool provided in the present application can be adapted to a wide range and can be adapted to different types of fasteners, such as pull rivet nuts 2022 / pressure rivet nuts, pull rivet nuts 2022 coated with sealant, pull rivet nuts 2022 not coated with sealant, through-hole pull (pressure) rivet nuts, blind hole pull (pressure) rivet nuts, bolts 2021 (coated with glue / not coated with glue), etc., and can realize multifunctional testing of different assembly interfaces through the two forms of upper inflation / lower inflation, which greatly improves the efficiency and convenience of studying the sealing reliability of the fastener assembly interface.

[0090] It should be noted that the airtightness testing tool provided in the present application can also test the sealing between the bolts 2021 and nuts on other objects, and is not limited to the sealing between the box body and the box cover of the battery pack.

[0091] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An air tightness test tool, characterized in that: include: A tooling upper cover, wherein the tooling upper cover is provided with at least one first cavity on a side close to the test piece sample; The opening of the first cavity is close to the test piece sample; A tool base, wherein at least one second cavity is provided on a side of the tool base close to the test piece sample, and an opening of the second cavity is close to the test piece sample; The test piece sample is provided with at least one first through hole penetrating the test piece sample, a first fastener for sealing and fixing the test piece sample is provided in the first through hole, one end of the first fastener is close to the first cavity, and the other end of the first fastener is close to the second cavity; The airtightness testing tool is configured to test the airtightness at the first through hole.

2. The airtightness test tool according to claim 1, characterized in that: The test piece sample is arranged between the tooling upper cover and the tooling base.

3. The airtightness test tool according to claim 1, characterized in that: The test piece samples include a box cover simulation piece and a box body simulation piece; The box cover simulation component and the box body simulation component are fixedly connected by a first fastener.

4. The airtightness test tool according to claim 3, characterized in that: The test piece sample also includes a sealing member; Wherein, the sealing member is arranged between the box cover simulation member and the box body simulation member, and the first through hole passes through the box cover simulation member, the sealing member and the box body simulation member in sequence.

5. The airtightness test tool according to claim 4, characterized in that: The first fastener includes a bolt and a rivet nut; Wherein, the bolt and the rivet nut seal and fix the box cover simulation component and the box body simulation component at the first through hole.

6. The airtightness test tool according to claim 1, characterized in that: The space between the first fastener and the inner wall of the first through hole is filled with sealant.

7. The airtightness test tool according to claim 3, characterized in that: The box cover simulation piece is configured to simulate the first contact portion of the box cover, and the box body simulation piece is configured to simulate the second contact portion of the box body; the first contact portion is fixedly connected to the second contact portion to achieve a fixed connection between the box cover and the box body.

8. The airtightness test tool according to any one of claims 1 to 7, characterized in that: The tooling upper cover is provided with a plurality of the first cavities, and the first cavities are not connected to each other; or / and, The tooling base is provided with a plurality of the second cavities, and the second cavities are not connected to each other.

9. The airtightness test tool according to any one of claims 1 to 7, characterized in that: A first airtight adapter is provided on a side of the tooling upper cover away from the first cavity, and the first airtight adapter is connected to the first cavity; or / and, A second airtight adapter is provided on a side of the tooling base away from the second cavity, and the second airtight adapter is connected to the first cavity; or / and, A first groove is provided on a side of the tooling upper cover close to the test piece sample, and a second sealing member is placed in the first groove and is arranged around the first cavity; or / and, A second groove is provided on one side of the tooling base close to the test piece sample, and a second sealing member is placed in the second groove and is arranged around the second cavity.

10. The airtightness test tool according to any one of claims 1 to 7, characterized in that: A handle is provided on a side of the tool cover away from the test piece sample, and the handle is fixedly connected to the tool cover; or / and, The tooling upper cover and the tooling base are fixedly connected by a second fastener.

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