Battery pack airtightness test tool

Abstract

The utility model relates to a battery pack airtightness testing tool. The battery pack airtightness testing tool comprises a mounting frame, a fixing assembly and a pressing assembly. The fixing assemblies are connected to the mounting frame, the at least two fixing assemblies are arranged at intervals in the first direction, each fixing assembly comprises a fixing part and a connecting assembly, the fixing parts are connected to the mounting frame through the connecting assemblies, the connecting assemblies are movably arranged in the first direction relative to the mounting frame, and the fixing parts are used for abutting against the battery pack; and the pressing assemblies are arranged on the sides, facing the fixing parts, of the mounting frames, the pressing assemblies are located between every two adjacent fixing assemblies, the sides, deviating from the mounting frames, of the pressing assemblies are provided with abutting surfaces, and the abutting surfaces are used for abutting against the battery pack. The battery pack air tightness testing device can improve the yield of battery pack air tightness testing, can be suitable for air tightness testing of battery packs with different widths, and is wider in application range.

Description

Technical Field

[0001] This application relates to the field of battery pack testing technology, and in particular to a battery pack airtightness testing fixture. Background Technology

[0002] The battery pack needs to be equipped with a sealed enclosure to protect the battery modules inside. After the internal installation is completed, the upper cover can be fixed to the lower enclosure with bolts. After the upper cover is installed, the airtightness of the enclosure is usually tested to test its waterproof and sealing performance. This involves inflating the battery pack to test for airtightness and to check for any gas leakage during the inflation process.

[0003] However, during the airtightness test of the battery pack, the structure at the weakest point of the casing is prone to deformation or even cracking, which affects the sealing structure of the battery pack and reduces the yield of the airtightness test. Utility Model Content

[0004] In view of the above problems, this application provides a battery pack airtightness testing fixture, which can improve the yield of battery pack airtightness testing.

[0005] This application proposes a battery pack airtightness testing fixture, including a mounting frame, a fixing component, and a clamping component; the fixing component is connected to the mounting frame, and at least two sets of fixing components are spaced apart along a first direction. The fixing component includes a fixing part and a connecting component. The fixing part is connected to the mounting frame through the connecting component, and the connecting component is movably disposed relative to the mounting frame along the first direction. The fixing part is used to abut against the battery pack; the clamping component is disposed on the side of the mounting frame facing the fixing part, and the clamping component is located between two adjacent sets of fixing components. The side of the clamping component away from the mounting frame is provided with an abutting surface, which is used to abut against the battery pack.

[0006] In this embodiment of the application, the battery pack airtightness testing fixture includes a mounting frame, fixing components, and clamping components. Two sets of fixing components are mounted opposite each other on both sides of the battery pack in a first direction. The clamping components abut against the surface of the weakest point of the battery pack, which can limit the outward expansion and deformation of the battery pack body at that location during the airtightness test, thereby reducing the risk of deformation or even cracking of the battery pack, improving the yield of the airtightness test, and reducing the impact of battery pack deformation on its performance and reliability. Furthermore, at least one set of fixing components can be adjusted along the first direction, thereby changing the width of the clamping space between the two sets of fixing components. This allows the battery pack airtightness testing fixture to be applicable to airtightness testing of battery packs of different widths, thus broadening its applicability.

[0007] In some embodiments, the connecting component is movably disposed relative to the mounting bracket along a second direction, so that the fixing portion can move closer to or further away from the mounting bracket, the second direction intersecting the first direction.

[0008] In these embodiments, the connecting assembly can also adjust the distance between the fixing part and the mounting bracket, thereby adapting to battery packs with different assembly heights and further expanding its applicability. Furthermore, by changing the distance between the fixing part and the mounting bracket, the clamping force of the clamping assembly on the battery pack surface can be further adjusted.

[0009] In some embodiments, the connecting assembly includes a first mounting portion and an adjusting member; the first mounting portion is movably connected to the mounting bracket along a first direction; the adjusting member is movably connected to the first mounting portion along a second direction, and one end of the adjusting member is connected to the fixing portion.

[0010] In these embodiments, the first mounting part is movably connected to the mounting frame along the first direction, and the adjusting member is movably connected to the first mounting part along the second direction, so that the fixing part connected to one end of the adjusting member can move in the coordinate system formed by the first and second directions, and can cooperate with battery packs of different widths and heights to realize the assembly of the tooling and the battery pack, further improving the applicability of the tooling.

[0011] In some embodiments, the adjusting member includes a threaded rod and a threaded handle. The threaded rod passes through the first mounting portion and is connected at one end to the fixing portion. The threaded handle has a threaded hole with its axis in the second direction. The threaded rod is threadedly connected to the threaded hole. The threaded handle and the fixing portion are disposed opposite to each other on both sides of the first mounting portion along the second direction.

[0012] In these embodiments, by setting a threaded handle to drive the threaded rod to move the fixed part in the second direction, it has the advantages of quick installation and simple operation.

[0013] In some embodiments, the first mounting portion is provided with a first linear bearing, and the adjusting member is movably connected to the first linear bearing along a second direction.

[0014] In these embodiments, by providing a first linear bearing in the first mounting portion, the friction between the adjusting member and the first linear bearing can be effectively reduced and the precision can be high, making the linear movement of the adjusting member along the second direction smoother.

[0015] In some embodiments, the clamping assembly is movably connected to the mounting bracket along a first direction.

[0016] In these embodiments, the clamping assembly is movable in the first direction, allowing the contact position between the contact surface and the battery pack to be adjusted as needed, thereby further improving the applicability of the tooling.

[0017] In some embodiments, the clamping assembly includes a second mounting portion, a clamping portion, and an elastic reset member. The second mounting portion is movably connected to the mounting bracket along a first direction. The clamping portion and the second mounting portion are spaced apart along a second direction, and the contact surface is located on the side of the clamping portion away from the second mounting portion. The elastic reset member is at least partially connected between the clamping portion and the second mounting portion.

[0018] In these embodiments, the clamping assembly is provided with an elastic reset member, which can press the battery pack against the clamping part by the restoring force of the elastic reset member, and the clamping force can be controlled by the compression amount of the elastic reset member, so as to standardize the clamping force for each test.

[0019] In some embodiments, the elastic reset member includes a guide shaft, an elastic portion, and a locking portion. The guide shaft is disposed on the side of the clamping portion facing the second mounting portion, and extends along a second direction and passes through the second mounting portion. The elastic portion is sleeved on the outer periphery of the guide shaft and is located between the second mounting portion and the clamping portion. The locking portion is connected to the guide shaft and is located on the side of the second mounting portion away from the clamping portion.

[0020] In these embodiments, the structure of the guide shaft, the elastic part, and the locking part makes the movement of the clamping part smooth and reliable, and it is easy to set up and install.

[0021] In some embodiments, the number of elastic reset elements is multiple, and the multiple elastic reset elements are arranged at intervals.

[0022] In these embodiments, the overall balance and stability of the clamping assembly are improved by providing multiple resilient reset elements.

[0023] In some embodiments, the clamping assembly further includes a scale mounted on the clamping portion, the scale extending toward the second mounting portion in a second direction.

[0024] In these embodiments, a scale is provided to facilitate visual observation and adjustment of the clamping force of the clamping assembly on the battery pack.

[0025] In some embodiments, the fixing part includes a fixing block and an anti-slip pad. The fixing block is connected to the connecting assembly and extends toward another fixing block in a first direction. The anti-slip pad is disposed on the side surface of the fixing block facing the mounting bracket.

[0026] In these embodiments, the stability of the fixing part when it is fixed to the battery pack is improved by providing anti-slip pads.

[0027] In some embodiments, the number of clamping components is at least two sets, and the at least two sets of clamping components are spaced apart along a first direction.

[0028] In these embodiments, at least two sets of clamping components can clamp and support multiple weak points of the battery pack in the same plane, making it more practical.

[0029] In some embodiments, the mounting bracket is provided with a first slide rail on the side away from the clamping assembly, the first slide rail extends along a first direction, and the connecting assembly is slidably connected to the first slide rail; and / or, the mounting bracket is provided with a second slide rail on the side near the clamping assembly, the second slide rail extends along a first direction, and the clamping assembly is slidably connected to the second slide rail.

[0030] In these embodiments, by providing a first slide rail, friction during the movement of the connecting assembly relative to the mounting bracket can be reduced, and a guiding function is provided, making the movement of the connecting assembly along the first direction smoother. By providing a second slide rail, friction during the movement of the clamping assembly relative to the mounting bracket can be reduced, and a guiding function is provided, making the movement of the clamping assembly along the first direction smoother.

[0031] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0032] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0033] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0034] Figure 2 This is a schematic diagram of the structure of a battery pack provided in one embodiment of this application;

[0035] Figure 3 This is a schematic diagram of the structure of a battery module provided in one embodiment of this application;

[0036] Figure 4 This is a schematic diagram of the structure of a battery pack and a battery pack airtightness testing fixture provided in an embodiment of this application;

[0037] Figure 5 yes Figure 4 Enlarged view of section A;

[0038] Figure 6 This is a three-dimensional structural schematic diagram of a battery pack airtightness testing fixture provided in an embodiment of this application.

[0039] Figure 7 This is a three-dimensional structural schematic diagram of the battery pack airtightness testing fixture provided in one embodiment of this application from another perspective;

[0040] Figure 8 yes Figure 7 Enlarged view of section B;

[0041] Figure 9 yes Figure 7 Enlarged view of section C.

[0042] The accompanying drawings may not be drawn to scale.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1000, vehicles;

[0045] 100. Battery pack; 110. Controller; 120. Motor;

[0046] 200. Battery module; 210. Battery cell;

[0047] 300. Enclosure; 301. First enclosure; 302. Second enclosure;

[0048] 10. Battery pack airtightness testing fixture;

[0049] 1. Mounting bracket; 11. First slide rail; 12. Second slide rail;

[0050] 2. Fixing component; 21. Fixing part; 211. Fixing block; 212. Anti-slip pad; 22. Connecting component; 221. First mounting part; 2211. First linear bearing; 222. Adjusting component; 2221. Threaded rod; 2222. Threaded handle;

[0051] 3. Clamping assembly; 30. Abutment surface; 31. Second mounting part; 32. Clamping part; 33. Elastic reset part; 331. Guide shaft; 332. Elastic part; 333. Locking part; 34. Scale;

[0052] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0054] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0055] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0056] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0057] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0058] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0059] In this application, "multiple" means two or more (including two).

[0060] During airtightness testing of battery packs, structural weaknesses in the casing can easily lead to deformation or even cracking, affecting the sealing structure and reducing the yield rate of airtightness testing. In related technologies, a bracket and pressure plate can be installed on the top cover of the battery pack. The bracket is fitted and fixed to the battery pack, and the pressure plate is pressed against the easily deformable parts of the battery pack, thus limiting deformation and improving the yield rate of airtightness testing. However, this structure is only compatible with a single type of battery pack, limiting its applicability.

[0061] To address the aforementioned issues, this application provides a battery pack airtightness testing fixture, including a mounting frame, fixing components, and clamping components. Two sets of fixing components are mounted opposite each other on both sides of the battery pack in a first direction. The clamping components abut against the surface of the weakest point of the battery pack, limiting outward expansion and deformation of the battery pack body at that location during airtightness testing. This reduces the risk of deformation or even cracking of the battery pack, improves the yield rate of airtightness testing, and minimizes the impact of deformation on its performance and reliability. Furthermore, at least one set of fixing components can be adjusted along the first direction, thereby changing the width of the clamping space between the two sets of fixing components. This allows the battery pack airtightness testing fixture to be applicable to airtightness testing of battery packs of different widths, thus broadening its applicability.

[0062] The battery pack can be used in electrical devices, such as vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles. Spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers. This application does not impose any special limitations on the aforementioned electrical devices.

[0063] A battery pack is a single physical module that includes one or more battery cells to provide higher voltage and capacity. A battery pack typically includes a housing for enclosing the battery cells. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0064] For the sake of brevity, we will use the application of battery packs in electric vehicles as an example.

[0065] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery pack 100 is disposed inside the vehicle 1000, and the battery pack 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery pack 100 can be used to power the vehicle 1000; for example, the battery pack 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 110 and a motor 120. The controller 110 is used to control the battery to supply power to the motor 120, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0066] In some embodiments of this application, the battery pack 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0067] Figure 2 A schematic diagram of the structure of a battery pack according to an embodiment of this application is shown.

[0068] The battery pack 100 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells 210, which are connected in series, parallel, or mixed connections via a busbar.

[0069] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells 210.

[0070] Figure 3 A schematic diagram of the structure of a battery module according to an embodiment of this application is shown.

[0071] As an example, the battery cell assembly can be a battery module 200, which is formed by arranging and fixing multiple battery cells 210 into an independent module. As an example, the battery module 200 can be formed by bundling multiple battery cells 210 together with cable ties.

[0072] In some embodiments, the battery pack includes a housing 300 and one or more battery cell assemblies, the battery cell assemblies being housed within the housing 300.

[0073] As an example, the battery cell assembly can be a battery module 200, which can be housed in the housing 300 by fixing the battery module 200 in the housing 300.

[0074] As an example, the battery cell assembly can also be housed in the housing 300 by directly fixing multiple battery cells 210 to the housing 300.

[0075] As an example, the housing 300 may include a first housing 301 and a second housing 302. The first housing 301 and the second housing 302 cover each other, and together they define a closed receiving space for accommodating the battery cell assembly. Here, "closed" means covered or closed, and can be sealed or unsealed. The first housing 301 may be a top cover or a bottom plate.

[0076] The second box 302 can be a hollow structure with one end open, and the first box 301 is a plate-like structure. The first box 301 covers the open side of the second box 302 to form a box 300 with a receiving portion. Alternatively, both the first box 301 and the second box 302 can be hollow structures with one side open, and the open side of the first box 301 covers the open side of the second box 302 to form a box 300 with a receiving space. Of course, the first box 301 and the second box 302 can be of various shapes, such as cylinders, cuboids, etc.

[0077] As an example, the housing 300 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 300 forms an enclosed space to accommodate the battery cell assembly.

[0078] In some embodiments, the housing 300 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 300 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 300 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0079] Figure 4 This invention provides a schematic diagram of the structure of a battery pack and a battery pack airtightness testing fixture according to an embodiment of this application. Figure 5 It shows Figure 4 Enlarged view of section A; Figure 6 and Figure 7 The three-dimensional structural schematic diagrams of the battery pack airtightness testing fixture from different perspectives in this embodiment are shown respectively.

[0080] Please see Figures 4 to 7This application proposes a battery pack airtightness testing fixture 10, which includes a mounting frame 1, a fixing component 2, and a clamping component 3. The fixing component 2 is connected to the mounting frame 1, and at least two sets of fixing components 2 are spaced apart along a first direction X. The fixing component 2 includes a fixing part 21 and a connecting component 22. The fixing part 21 is connected to the mounting frame 1 through the connecting component 22, and the connecting component 22 is movably arranged relative to the mounting frame 1 along the first direction X. The fixing part 21 is used to abut against the battery pack 100. The clamping component 3 is disposed on the side of the mounting frame 1 facing the fixing part 21, and the clamping component 3 is located between two adjacent sets of fixing components 2. The side of the clamping component 3 away from the mounting frame 1 is provided with an abutting surface 30, which is used to abut against the battery pack 100.

[0081] Mounting bracket 1 provides mounting positions for fixing component 2 and clamping component 3. Mounting bracket 1 extends along a first direction X to facilitate movement of fixing component 2 along the first direction X on mounting bracket 1. Optionally, mounting bracket 1 may have a hollow area to facilitate mounting connecting component 22 on both sides of the hollow area, making the movement of connecting component 22 smoother. Battery pack airtightness testing fixture 10 is hereinafter referred to as fixture.

[0082] Optionally, the fixing part 21 is connected to the mounting point of the battery pack 100 to fix the tooling, thereby assembling the tooling with the battery pack 100 and fixing the relative position of the tooling and the battery pack 100. For example, the mounting point can be a crash beam on the periphery of the battery pack 100.

[0083] Optionally, the tooling is used to press the surface of the first housing 301 of the battery pack 100 away from the second housing 302. The upper surface of the fixing part 21 can abut against the lower surface of the side beam of the second housing 302, thereby clamping the pressing component 3 in the middle through the mounting bracket 1 and the surface of the first housing 301, so that the pressing component 3 provides support and pressing effect on the surface of the first housing 301. In order to make the connection between the fixing part 21 and the second housing 302 more secure, if the side beam of the second housing 302 has a pre-reserved mounting hole, the fixing part 21 can be opened with a corresponding assembly hole, and the fixing effect can be strengthened by inserting pins or bolts into the mounting hole and the assembly hole together.

[0084] Optionally, the connecting assembly 22 can also adjust the distance between the fixing part 21 and the mounting bracket 1, thereby adapting it to battery packs 100 with different assembly heights and further improving its applicability. Furthermore, by changing the distance between the fixing part 21 and the mounting bracket 1, the clamping force of the clamping assembly 3 on the surface of the battery pack 100 can be further adjusted.

[0085] In this embodiment, the battery pack airtightness testing fixture 10 includes a mounting frame 1, fixing components 2, and clamping components 3. Two sets of fixing components 2 are mounted opposite each other on both sides of the battery pack 100 in the first direction X. The abutting surface 30 of the clamping components 3 abuts against the surface of the weakest point of the battery pack 100, which can limit the outward expansion and deformation of the battery pack 100 during the airtightness test, thereby reducing the risk of deformation or even cracking of the battery pack 100, improving the yield of the airtightness test, and reducing the impact of deformation on the performance and reliability of the battery pack 100. Furthermore, at least one set of fixing components 2 can be adjusted along the first direction X, thereby changing the width of the clamping space between the two sets of fixing components 2, making the battery pack airtightness testing fixture 10 applicable to airtightness tests of battery packs 100 of different widths, thus broadening its applicability.

[0086] For a battery pack 100, tooling can be installed at multiple locations on the first housing 301 of the battery pack 100. Each tooling can also be equipped with multiple clamping components 3, thereby improving the protection and support effect of the first housing 301 during the airtightness test of the battery pack 100.

[0087] Taking the battery pack 100 installed in the vehicle 1000 as an example, under normal vehicle conditions, the first housing 301 of the battery pack 100 can fit against the chassis of the vehicle 1000, and the chassis can also support and protect the battery pack 100 from the outside.

[0088] Reference Figure 7 In some embodiments, the connecting component 22 is movably disposed relative to the mounting bracket 1 along the second direction Y, so that the fixing part 21 can move closer to or further away from the mounting bracket 1, the second direction Y intersecting the first direction X.

[0089] The second direction Y can be perpendicular to the first direction X. If the first direction X is horizontal, then the second direction Y is vertical. By driving the fixing part 21 to move up and down along the second direction Y through the connecting component 22, the distance between the fixing part 21 and the mounting bracket 1 can be adjusted, allowing the tooling to be adapted to battery packs 100 with different assembly heights. It can also adjust the clamping force of the clamping component 3 on the battery pack 100.

[0090] In these embodiments, the connecting assembly 22 can also adjust the distance between the fixing part 21 and the mounting bracket 1, thereby adapting it to battery packs 100 with different assembly heights and further improving its applicability. Furthermore, by changing the distance between the fixing part 21 and the mounting bracket 1, the clamping force of the clamping assembly 3 on the surface of the battery pack 100 can be further adjusted.

[0091] In some embodiments, the connecting component 22 includes a first mounting portion 221 and an adjusting member 222; the first mounting portion 221 is movably connected to the mounting frame 1 along a first direction X; the adjusting member 222 is movably connected to the first mounting portion 221 along a second direction Y, and one end of the adjusting member 222 is connected to the fixing portion 21.

[0092] The first mounting part 221 is movably connected to the mounting frame 1 along the first direction X. Alternatively, the first mounting part 221 may be slidably connected to the mounting frame 1, and the first mounting part 221 may be movable relative to the mounting frame 1 along the first direction X.

[0093] The adjusting member 222 is movably connected to the first mounting portion 221 along the second direction Y. This connection can be either slidable or threaded. At least a portion of the structure of the adjusting member 222 is movable relative to the first mounting portion 221 along the second direction Y. Optionally, the adjusting member 222 is slidably connected to the first mounting portion 221, and changing the position of the connection between the adjusting member 222 and the fixed portion 21 allows the fixed portion 21 to move along the second direction Y. Alternatively, the adjusting member 222 may also be provided with a threaded structure and threadedly connected to the hole opened in the first mounting part 221. By rotating the adjusting member 222, the adjusting member 222 as a whole can be driven to move along the second direction Y together with the fixing part 21. It can be understood that in order to prevent the fixing part 21 from rotating with the adjusting member 222 and causing the assembly failure with the battery pack 100, the fixing part 21 may be rotatably connected to the adjusting member 222 along the rotation axis of the adjusting member 222, so that the fixing part 21 can move up and down with the adjusting member 222, and does not need to rotate with the adjusting member 222.

[0094] In these embodiments, the first mounting part 221 is movably connected to the mounting frame 1 along the first direction X, and the adjusting member 222 is movably connected to the first mounting part 221 along the second direction Y, so that the fixing part 21 connected to one end of the adjusting member 222 can move in the coordinate system formed by the first direction X and the second direction Y, and can cooperate with battery packs 100 of different widths and heights to realize the assembly of the tooling with the battery pack 100, further improving the applicability of the tooling.

[0095] In some embodiments, the adjusting member 222 includes a threaded rod 2221 and a threaded handle 2222. The threaded rod 2221 passes through the first mounting portion 221 and is connected at one end to the fixing portion 21. The threaded handle 2222 is provided with a threaded hole with the axis in the second direction Y. The threaded rod 2221 is threadedly connected to the threaded hole. The threaded handle 2222 and the fixing portion 21 are disposed opposite to each other on both sides of the first mounting portion 221 along the second direction Y.

[0096] The threaded rod 2221 is provided with external threads, and the threaded hole is provided with internal threads. The two mesh with each other and can be rotated by rotating the threaded handle 2222 to raise or lower the threaded rod 2221 along the second direction Y, thereby driving the fixing part 21 to rise or fall. The side of the threaded handle 2222 facing the first mounting part 221 can abut against the first mounting part 221, or it can be rotatably mounted on the first mounting part 221. After the fixing block 211 is aligned and fixed with the mounting point of the battery pack 100, rotating the threaded handle 2222 makes the internal thread mesh with the external threads located at different heights in the second direction Y, thereby changing the height of the threaded handle 2222, the first mounting part 221, and the mounting bracket 1 in the second direction Y, so that the clamping component 3 mounted on the mounting bracket 1 can move with the mounting bracket 1 to clamp the battery pack 100.

[0097] In these embodiments, by setting a threaded handle 2222 to drive the threaded rod 2221 to move the fixing part 21 along the second direction Y, it has the advantages of quick installation and simple operation.

[0098] Combined with reference Figure 7 and Figure 8 In some embodiments, the first mounting part 221 is provided with a first linear bearing 2211, and the adjusting member 222 is movably connected to the first linear bearing 2211 along the second direction Y.

[0099] Linear bearings utilize rolling elements (such as balls, rollers, or needle rollers) rolling between the bearing housing and the guide shaft 331 to achieve linear motion of an object. Linear bearings can be ball linear bearings or roller linear bearings, etc. Linear bearings can also be flange-type linear bearings.

[0100] In these embodiments, by providing a first linear bearing 2211 in the first mounting portion 221, the friction between the adjusting member 222 and the first linear bearing 2211 can be effectively reduced and the precision can be high, making the linear movement of the adjusting member 222 along the second direction Y smoother.

[0101] In some embodiments, the fixing part 21 includes a fixing block 211 and an anti-slip pad 212. The fixing block 211 is connected to the connecting assembly 22. The fixing block 211 extends toward another fixing block 211 along a first direction X. The anti-slip pad 212 is disposed on the side surface of the fixing block 211 facing the mounting bracket 1.

[0102] The fixing block 211 can be connected to the end of the threaded rod 2221 away from the threaded handle 2222. The anti-slip pad 212 is clamped between the fixing block 211 and the crossbeam of the second housing 302 to increase the friction between the fixing part 21 and the second housing 302 at the assembly point.

[0103] In these embodiments, the stability of the fixing part 21 during assembly and fixing with the battery pack 100 is improved by providing anti-slip pads 212.

[0104] Combined with reference Figure 7 and Figure 9 In some embodiments, the clamping assembly 3 is movably connected to the mounting bracket 1 along the first direction X.

[0105] The clamping assembly 3 can be slidably connected to the mounting bracket 1, and the clamping assembly 3 can move relative to the mounting bracket 1 in the first direction X. When the mounting bracket 1 moves in the second direction Y, the clamping assembly 3 can move together with the mounting bracket 1 in the second direction Y, so that the clamping assembly 3 can be driven by the adjusting member 222 to clamp or loosen the battery pack 100.

[0106] In these embodiments, the clamping component 3 is movable in the first direction X, so that the contact position between the contact surface 30 and the battery pack 100 can be adjusted as needed, thereby further improving the applicability of the tooling.

[0107] In some embodiments, the clamping assembly 3 includes a second mounting portion 31, a clamping portion 32, and an elastic reset member 33. The second mounting portion 31 is movably connected to the mounting bracket 1 along a first direction X. The clamping portion 32 and the second mounting portion 31 are spaced apart along a second direction Y, and the abutment surface 30 is located on the side of the clamping portion 32 away from the second mounting portion 31. The elastic reset member 33 is at least partially connected between the clamping portion 32 and the second mounting portion 31.

[0108] When an external force is applied to the elastic reset member 33, it deforms and stores energy. When the external force is removed, the elastic reset member 33 releases the stored energy and returns to its original state or a predetermined position through its own elastic restoring force.

[0109] The clamping part 32 and the elastic reset member 33 can move together with the second mounting part 31 along the first direction X. By rotating the threaded handle 2222, the mounting bracket 1 can be driven to move relative to the battery pack 100 in the second direction Y, so that the clamping assembly 3 mounted on the mounting bracket 1 can move with the mounting bracket 1 to clamp the battery pack 100. When the clamping part 32 is subjected to the pushing force from the battery pack 100, it will transmit the force to the elastic reset member 33, causing the elastic reset member 33 to be compressed.

[0110] In these embodiments, the clamping assembly 3 is provided with an elastic reset member 33, which can push the clamping part 32 to clamp the battery pack 100 by the restoring force of the elastic reset member 33, and control the clamping force by the compression amount of the elastic reset member 33, so as to standardize the clamping force for each test.

[0111] In some embodiments, the elastic reset member 33 includes a guide shaft 331, an elastic portion 332, and a locking portion 333. The guide shaft 331 is disposed on the side of the pressing portion 32 facing the second mounting portion 31. The guide shaft 331 extends along the second direction Y and passes through the second mounting portion 31. The elastic portion 332 is sleeved on the outer periphery of the guide shaft 331 and is located between the second mounting portion 31 and the pressing portion 32. The locking portion 333 is connected to the guide shaft 331 and is located on the side of the second mounting portion 31 away from the pressing portion 32.

[0112] One end of the guide shaft 331 can be fixedly connected to the clamping part 32, and by providing a through hole or linear bearing on the second mounting part 31 that matches the outer diameter of the guide shaft 331, the movement stability of the clamping part 32 relative to the second mounting part 31 in the second direction Y can be improved. Both ends of the elastic part 332 can abut against the surfaces of the second mounting part 31 and the clamping part 32 respectively. When the clamping assembly 3 presses against the battery pack 100, the elastic part 332 is in a compressed state, with both ends abutting against the surfaces of the second mounting part 31 and the clamping part 32 respectively. The locking part 333 can limit the stroke of the guide shaft 331 to prevent the guide shaft 331 from dislodging from the second mounting part 31. Optionally, the elastic part 332 can be a compression spring. Optionally, the locking part 333 can be a shaft clamp.

[0113] In these embodiments, the structure of the guide shaft 331, the elastic part 332 and the locking part 333 makes the movement of the pressing part 32 smooth and reliable, and the setting is simple and easy to install.

[0114] In some embodiments, the number of elastic reset members 33 is multiple, and the multiple elastic reset members 33 are arranged at intervals.

[0115] The second mounting part 31 and the clamping part 32 can be square plate-shaped structures, and multiple elastic reset members 33 can be disposed at the four corners of the clamping part 32. For example, the number of elastic reset members 33 in each set of clamping components 3 can be four.

[0116] In these embodiments, the overall balance and stability of the clamping assembly 3 are improved by providing multiple elastic reset elements 33.

[0117] In some embodiments, the clamping assembly 3 further includes a scale 34, which is mounted on the clamping part 32 and extends toward the second mounting part 31 along the second direction Y.

[0118] The scale 34 can be engraved with multiple graduations along the second direction Y, so that the operator can determine the clamping force of the clamping assembly 3 on the battery pack 100 based on the position of the second mounting part 31 relative to the scale 34, as well as the elastic modulus and quantity of the elastic reset member 33.

[0119] In these embodiments, a scale 34 is provided to facilitate visual observation and adjustment of the clamping force of the clamping assembly 3 on the battery pack 100.

[0120] In some embodiments, the number of clamping components 3 is at least two sets, and the at least two sets of clamping components 3 are spaced apart along the first direction X.

[0121] In these embodiments, such as Figure 4 As shown, at least two sets of clamping components 3 can clamp and support multiple weak points of the battery pack 100 in the same plane, making it more practical.

[0122] It is understandable that for the weak points of the first housing 301 that need to be compressed in different horizontal planes, another battery pack airtightness test fixture 10 provided in this application embodiment can be set accordingly.

[0123] Reference Figure 7 In some embodiments, the mounting bracket 1 is provided with a first slide rail 11 on the side away from the clamping assembly 3, the first slide rail 11 extends along the first direction X, and the connecting assembly 22 is slidably connected to the first slide rail 11; and / or, the mounting bracket 1 is provided with a second slide rail 12 on the side close to the clamping assembly 3, the second slide rail 12 extends along the first direction X, and the clamping assembly 3 is slidably connected to the second slide rail 12.

[0124] There can be two first slide rails 11, spaced apart along the third direction Z on the mounting frame 1. The connecting assembly 22 is mounted on the two sets of first slide rails 11. The third direction Z is perpendicular to the first direction X, and the third direction Z can also be perpendicular to the second direction Y. It is understood that the two sets of connecting assemblies 22 can share the same set of first slide rails 11, or they can be located on separate first slide rails 11. The second slide rail 12 can be arranged with reference to the first slide rails 11, except that the first slide rails 11 and the second slide rail 12 are arranged opposite each other on both sides of the mounting frame 1 in the second direction Y, so as to reduce the interference between the clamping assembly 3 and the connecting assembly 22.

[0125] In these embodiments, by providing the first slide rail 11, friction during the movement of the connecting assembly 22 relative to the mounting bracket 1 can be reduced, and it also has a guiding function, making the movement of the connecting assembly 22 along the first direction X smoother. By providing the second slide rail 12, friction during the movement of the clamping assembly 3 relative to the mounting bracket 1 can be reduced, and it also has a guiding function, making the movement of the clamping assembly 3 along the first direction X smoother.

[0126] Please see Figures 4 to 9According to some embodiments of this application, this application provides a battery pack airtightness testing fixture 10. The battery pack airtightness testing fixture 10 includes a mounting frame 1, a fixing component 2, and a clamping component 3. The fixing component 2 is connected to the mounting frame 1, and at least two sets of fixing components 2 are spaced apart along a first direction X. The fixing component 2 includes a fixing part 21 and a connecting component 22. The fixing part 21 is connected to the mounting frame 1 through the connecting component 22, and the connecting component 22 is movably disposed relative to the mounting frame 1 along the first direction X. The fixing part 21 is used to abut against the battery pack 100. The clamping component 3 is disposed on the side of the mounting frame 1 facing the fixing part 21, and the clamping component 3 is located between two adjacent sets of fixing components 2. The side of the clamping component 3 facing away from the mounting frame 1 is provided with an abutting surface 30, which is used to abut against the battery pack 100. The connecting component 22 is movably disposed relative to the mounting frame 1 along a second direction Y, so that the fixing part 21 can move closer to or further away from the mounting frame 1. The second direction Y intersects with the first direction X. The connecting assembly 22 includes a first mounting portion 221 and an adjusting member 222. The first mounting portion 221 is movably connected to the mounting frame 1 along a first direction X. The adjusting member 222 is movably connected to the first mounting portion 221 along a second direction Y, and one end of the adjusting member 222 is connected to the fixing portion 21. The adjusting member 222 includes a threaded rod 2221 and a threaded handle 2222. The threaded rod 2221 passes through the first mounting portion 221 and one end is connected to the fixing portion 21. The threaded handle 2222 has a threaded hole with its axis along the second direction Y. The threaded rod 2221 is threadedly connected to the threaded hole, and the threaded handle 2222 and the fixing portion 21 are disposed opposite to each other on both sides of the first mounting portion 221 along the second direction Y. The clamping assembly 3 is movably connected to the mounting frame 1 along the first direction X. The clamping assembly 3 includes a second mounting portion 31, a clamping portion 32, and an elastic reset member 33. The second mounting portion 31 is movably connected to the mounting bracket 1 along a first direction X. The clamping portion 32 and the second mounting portion 31 are spaced apart along a second direction Y, and the contact surface 30 is located on the side of the clamping portion 32 away from the second mounting portion 31. The elastic reset member 33 is at least partially connected between the clamping portion 32 and the second mounting portion 31. The clamping assembly 3 also includes a scale 34, which is mounted on the clamping portion 32 and extends towards the second mounting portion 31 along the second direction Y.

[0127] The battery pack airtightness testing fixture 10 provided in this application embodiment is lightweight, quick to install, and low in cost, which can improve the yield of battery pack 100 airtightness testing.

[0128] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery pack airtightness testing fixture, characterized in that, include: Mounting rack; A fixing component is connected to the mounting frame, and at least two sets of the fixing components are spaced apart along a first direction. The fixing component includes a fixing part and a connecting component. The fixing part is connected to the mounting frame through the connecting component, and the connecting component is movably disposed relative to the mounting frame along the first direction. The fixing part is used to abut against the battery pack. A clamping assembly is disposed on the side of the mounting bracket facing the fixing part, and the clamping assembly is located between two adjacent sets of fixing assemblies. The side of the clamping assembly facing away from the mounting bracket is provided with an abutment surface, which is used to abut the battery pack.

2. The battery pack airtightness testing fixture according to claim 1, characterized in that, The connecting component is movably disposed relative to the mounting bracket along a second direction, so that the fixing part can move closer to or further away from the mounting bracket, the second direction intersecting the first direction.

3. The battery pack airtightness testing fixture according to claim 2, characterized in that, The connection component includes: A first mounting part is movably connected to the mounting frame along the first direction; An adjusting member is movably connected to the first mounting portion along the second direction, and one end of the adjusting member is connected to the fixing portion.

4. The battery pack airtightness testing fixture according to claim 3, characterized in that, The adjusting element includes: A threaded rod passes through the first mounting portion and is connected at one end to the fixing portion; The threaded handle has a threaded hole with its axis in the second direction. The threaded rod is threadedly connected to the threaded hole. The threaded handle and the fixing part are disposed opposite to each other on both sides of the first mounting part along the second direction.

5. The battery pack airtightness testing fixture according to claim 3, characterized in that, The first mounting part is provided with a first linear bearing, and the adjusting member is movably connected to the first linear bearing along the second direction.

6. The battery pack airtightness testing fixture according to claim 1, characterized in that, The clamping assembly is movably connected to the mounting bracket along the first direction.

7. The battery pack airtightness testing fixture according to claim 6, characterized in that, The clamping assembly includes: The second mounting part is movably connected to the mounting frame along the first direction; A clamping part is provided at a distance from the second mounting part along a second direction, and the abutting surface is located on the side of the clamping part away from the second mounting part; An elastic reset member is at least partially connected between the clamping part and the second mounting part.

8. The battery pack airtightness testing fixture according to claim 7, characterized in that, The elastic reset element includes: A guide shaft is disposed on the side of the clamping part facing the second mounting part, and the guide shaft extends along the second direction and passes through the second mounting part; An elastic part is sleeved on the outer periphery of the guide shaft and located between the second mounting part and the clamping part; The locking part is connected to the guide shaft and is located on the side of the second mounting part away from the clamping part.

9. The battery pack airtightness testing fixture according to claim 7, characterized in that, The number of elastic reset elements is multiple, and the multiple elastic reset elements are arranged at intervals.

10. The battery pack airtightness testing fixture according to claim 7, characterized in that, The clamping assembly also includes a scale, which is mounted on the clamping part and extends toward the second mounting part along the second direction.

11. The battery pack airtightness testing fixture according to any one of claims 1 to 10, characterized in that, The fixing part includes a fixing block and an anti-slip pad. The fixing block is connected to the connecting assembly. The fixing block extends toward another fixing block along the first direction. The anti-slip pad is disposed on the side surface of the fixing block facing the mounting bracket.

12. The battery pack airtightness testing fixture according to any one of claims 1 to 10, characterized in that, The number of clamping components is at least two sets, and the at least two sets of clamping components are spaced apart along the first direction.

13. The battery pack airtightness testing fixture according to any one of claims 1 to 10, characterized in that, The mounting bracket is provided with a first slide rail on the side opposite to the clamping assembly. The first slide rail extends along the first direction, and the connecting assembly is slidably connected to the first slide rail. And / or, the mounting bracket is provided with a second slide rail on the side near the clamping assembly, the second slide rail extends along the first direction, and the clamping assembly is slidably connected to the second slide rail.

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