Battery bonding experiment system

Abstract

The invention provides a battery bonding experiment system. The battery bonding experiment system comprises a limiting device, a bearing device and a vibration table. The limiting device comprises two limiting pieces, the two limiting pieces are oppositely arranged in the first direction, and a limiting space used for containing at least one battery cell is formed between the two limiting pieces; the bearing device is located at the bottom of the limiting device, the bearing device is connected with the limiting device, at least one bonding area is formed on the bearing device, and when the battery cell is located in the limiting space, the battery cell is bonded with the bearing device through mucilage glue in the bonding area; the vibration table is connected with the bearing device and used for simulating vehicle body vibration of at least one degree of freedom. According to the invention, the problem of excessive glue consumption for fixing the battery cell in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery bonding, and in particular to a battery bonding experimental system. Background Art

[0002] With the continuous development and popularization of new energy vehicles and the continuous increase in the mileage of electric vehicles, the number and size of battery cells are also increasing. The control requirements for the preparation and assembly processes of batteries are becoming increasingly higher. Among them, the assembly process of batteries has a greater impact on the performance of batteries. Therefore, it is particularly important to control and test the assembly process of batteries.

[0003] In traditional power battery pack design, battery cells are usually bonded to battery cases, cold plates and other structural parts through structural adhesives or thermally conductive structural adhesives to ensure the stability and thermal management performance of the battery cells in the battery pack. However, as the size of battery packs increases, the shortcomings of traditional full-adhesive bonding methods gradually become apparent:

[0004] (1) The amount of glue used increases significantly, which in turn increases the manufacturing cost and complexity of the battery pack.

[0005] (2) The increase in the number of battery cells makes the bonding process more complicated, making it difficult to ensure uniform bonding between each battery cell and the structural parts, which may affect the overall performance and life of the battery pack.

[0006] (3) Fully glued battery packs require a long curing time during the production process, and it also becomes more difficult to disassemble and replace battery cells during subsequent maintenance or upgrades.

[0007] There is no effective solution to the above problems yet. Summary of the invention

[0008] The main purpose of the present invention is to provide a battery bonding test system to solve the problem of excessive glue used to fix the battery core in the prior art.

[0009] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a battery bonding experiment system is provided, comprising: a limiting device, the limiting device comprising two limiting members, the two limiting members are arranged opposite to each other along a first direction, and a limiting space for accommodating at least one battery cell is formed between the two limiting members; a carrying device, the carrying device is located at the bottom of the limiting device, the carrying device is connected to the limiting device, at least one bonding area is formed on the carrying device, when the battery cell is located in the limiting space, the battery cell is bonded to the carrying device through the adhesive in the bonding area; a vibration table, the vibration table is connected to the carrying device, and the vibration table is used to simulate vehicle body vibration with at least one degree of freedom.

[0010] Furthermore, there are a plurality of bonding areas, the plurality of bonding areas are arranged at intervals along the second direction, and each bonding area is extended along the first direction.

[0011] Further, the first direction is a thickness direction of the battery cell, and / or the second direction is a length direction of the battery cell.

[0012] Furthermore, the battery bonding test system also includes at least one limit bar group, the limit bar group includes two limit bars, the two limit bars are detachably connected to the supporting device, the two limit bars are arranged at intervals along the second direction, and each limit bar is extended along the first direction. The two limit bars and the supporting device are arranged to form a bonding area.

[0013] Furthermore, the bearing device includes two bottom beams, the two bottom beams are spaced apart along the second direction, each bottom beam is extended along the first direction, each bottom beam is connected to the limiting device, and at least one bonding area is formed on at least one of the two bottom beams.

[0014] Furthermore, the carrying device is a flat plate.

[0015] Furthermore, the battery bonding experimental system also includes a pre-tightening device, which is connected to both limit members, and is used to adjust the size of the two limit spaces to adjust the pre-tightening force of the two limit members on the battery cell.

[0016] Furthermore, the pre-tightening device includes a bolt and a nut, and bolt holes are opened on the two limit members. The first end of the bolt abuts against one of the limit members and is passed through the two bolt holes. The second end of the bolt is connected to the nut, and one side of the nut abuts against the other limit member, wherein the distance between the two limit members can be adjusted by adjusting the screw-in distance between the nut and the bolt.

[0017] Furthermore, a buffer member is provided on one side of the limiting member facing the limiting space.

[0018] Furthermore, the thickness of the limiting strip is L, wherein 1.0 mm ≥ L1 ≥ 0.6 mm.

[0019] By applying the technical solution of the present invention, the limiting device is composed of two relatively arranged limiting parts, forming a limiting space to accurately fix the battery cell; the supporting device is provided with a bonding area, and the battery cell is bonded to the supporting device through the adhesive in a specific area, so as to achieve precise control of the adhesive area; through the cooperation of the limiting device and the supporting device, the battery cell can be effectively fixed, and at the same time, the vibration table is used to simulate the vibration of the vehicle body, providing a precise testing environment for the bonding performance of the battery cell. The system can effectively explore the minimum adhesive area, reduce the amount of glue used, and reduce the manufacturing cost of the battery pack, while ensuring the stability of the battery cell in a simulated vibration environment, verifying the reliability of the adhesive, and improving the overall performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 It shows a schematic structural diagram of a first embodiment of a battery bonding experimental system according to the present invention;

[0022] Figure 2 It shows a structural schematic diagram of a second embodiment of a battery bonding experimental system according to the present invention;

[0023] Figure 3 A schematic structural diagram of a third embodiment of a battery bonding experimental system according to the present invention is shown.

[0024] The above drawings include the following reference numerals:

[0025] 1. Limiting parts;

[0026] 2. Bolts;

[0027] 3. Nut;

[0028] 4. Battery cells;

[0029] 5. Bottom beam;

[0030] 6. Buffer parts;

[0031] 7. Limit strip. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0036] The main function of the vibration table is to simulate the vibration environment of the battery under different road conditions, different frequencies and amplitudes. By applying a predetermined vibration to the battery, the strength of the battery structure, the bonding effect between the battery cell and the structural parts, and the performance stability of the entire battery pack under vibration conditions can be tested. Vibration testing is an important means to evaluate the durability and safety of the battery pack during vehicle driving.

[0037] The structure of the vibration table is introduced as follows:

[0038] (1) Drive system: The core of the vibration table is its drive system, which is usually driven by electric or hydraulic means. Electric-driven vibration tables use motors to generate vibrations, while hydraulic-driven vibration tables generate vibrations through a hydraulic pump and piston system. The design of the drive system must consider the ability to generate the required vibration frequency and amplitude, as well as stability and reliability during long-term operation.

[0039] (2) Vibration platform: This is the main part of the vibration table, which is used to carry the power battery under test. The vibration platform is usually designed as a sturdy metal frame with a flat surface to ensure that the battery is firmly placed during the test. The platform is connected to the drive system and transmits the generated vibration to the battery.

[0040] (3) Control and measurement system: The vibration table is equipped with advanced control systems and data acquisition equipment, which can set parameters such as vibration frequency, amplitude, test time and mode. At the same time, the vibration table is also equipped with sensors to monitor the battery response during vibration in real time, such as cell displacement, stress change and structural deformation, so as to collect accurate test data.

[0041] (4) Safety protection devices: Considering the risks that vibration tests may cause to batteries and experimenters, the vibration table is also equipped with a variety of safety protection measures, such as emergency stop buttons, overload protection systems and protective covers, to ensure safety during the experiment.

[0042] Combination Figures 1 to 3 As shown, according to a specific embodiment of the present application, a battery bonding experiment system is provided.

[0043] Specifically, the battery bonding experimental system includes: a limiting device, a bearing device and a vibration table.

[0044] The limiting device includes two limiting members 1, which are arranged opposite to each other along a first direction, and a limiting space for accommodating at least one battery cell 4 is formed between the two limiting members 1;

[0045] The carrying device is located at the bottom of the limiting device, the carrying device is connected to the limiting device, at least one bonding area is formed on the carrying device, and when the battery cell 4 is located in the limiting space, the battery cell 4 is bonded to the carrying device through the adhesive in the bonding area;

[0046] The vibration table is connected to the carrying device, and is used to simulate the vibration of the vehicle body with at least one degree of freedom.

[0047] By applying the technical solution of the present invention, the limiting device is composed of two relatively arranged limiting members 1, forming a limiting space to accurately fix the battery cell 4; the carrying device is provided with a bonding area, and the battery cell 4 is bonded to the carrying device through the adhesive in a specific area, so as to achieve precise control of the adhesive area; through the cooperation of the limiting device and the carrying device, the battery cell 4 can be effectively fixed, and at the same time, the vibration table is used to simulate the vibration of the vehicle body, providing an accurate test environment for the bonding performance of the battery cell 4. The system can effectively explore the minimum adhesive area, reduce the amount of glue used, and reduce the manufacturing cost of the battery pack, while ensuring the stability of the battery cell in a simulated vibration environment, verifying the reliability of the bonding, and improving the overall performance of the battery pack.

[0048] It should be further explained that the vibration table is the core equipment for conducting power battery vibration tests. It is used to simulate the vibration environment of the battery in actual applications, so as to evaluate the stability of the battery structure and the bonding effect.

[0049] Specifically, there are multiple bonding areas, and the multiple bonding areas are spaced along the second direction, and each bonding area is extended along the first direction. Such a design is intended to provide multiple independent bonding areas, allowing gluing operations to be performed at different positions on the bottom of the battery cell 4. By precisely controlling the amount and position of glue in each bonding area, the bonding performance between the battery cell 4 and the carrier device can be systematically studied and optimized to find the minimum effective gluing area that meets the vibration test requirements, thereby reducing unnecessary glue usage and reducing production costs while ensuring the stability of the battery cell 4 and the overall performance of the battery pack.

[0050] Further, the first direction is a thickness direction of the battery cell 4 , and / or the second direction is a length direction of the battery cell 4 .

[0051] like Figure 1 As shown, multiple battery cells 4 are arranged relatively along the first direction, multiple battery cells 4 are extended along the second direction, and multiple battery cells 4 are located in the limiting space formed by two relatively arranged limiting members 1. A plurality of bonding areas are provided on the carrier device, which are spaced along the length direction of the battery cell 4, and each bonding area extends along the thickness direction of the battery cell 4. Such a design can ensure the stability and reliability of the bonding between the battery cell 4 and the carrier device. By adjusting the number and position of the bonding areas, the influence of different bonding layouts on the battery cell 4 when subjected to vibration can be studied.

[0052] In a specific embodiment, a battery pack is tested, which includes 10 square cells 4, each of which has a size of 300mm x 150mm and is arranged along the length of the battery pack. Five bonding areas are designed on the carrier device, and the length of each bonding area covers the entire bottom of the cell 4 (300mm), but the width is only half of the width of the cell (75mm), and these bonding areas are arranged at intervals along the width direction. This means that the bottom of each cell 4 will be divided into three areas: the bonding area in the middle (75mm wide) and the non-bonding areas on both sides. In the experiment, we first placed the cell 4 in the limiting space of the limiting device to ensure that each cell 4 is accurately positioned. Then, structural glue is applied to each bonding area of ​​the carrier device, and the cell 4 is pressed onto the carrier device through the limiting device so that the bottom of the cell 4 is fully in contact with and bonded to the structural glue in the bonding area. Finally, the support device is connected to a vibration table, which is used to simulate the vibration environment during vehicle driving and test the stability of the battery cell 4 under vibration conditions to verify whether the bonding effect of the middle bonding area can meet the performance requirements of the power battery in the vibration test.

[0053] In another specific embodiment, a battery pack is tested, which includes 6 square cells 4 with a size of 200mm (length) x 100mm (width). They will be placed in the limiting space of the limiting device. The limiting device ensures that the cells 4 are accurately aligned in the thickness direction to prevent the cells 4 from affecting the bonding effect due to displacement during the vibration test. There are 3 bonding areas on the carrier device, each of which covers the entire width of the cell (100mm), but the length is only one-third of the length of the cell 4 (about 66.7mm), and these bonding areas are spaced along the length direction of the cell 4. In the experiment, the cell 4 is first placed in the limiting space, and then the structural glue is applied to the bonding area of ​​the carrier device to ensure that the bottom of the cell 4 is in full contact with the glue in the bonding area. Finally, the carrier device and the cell 4 are placed on a vibration table together to simulate the vibration environment of the vehicle during driving. The effectiveness of different bonding layouts is evaluated by analyzing the changes in the cell position after the vibration test and the bonding effect of the bonding area.

[0054] Through experimental research on different layouts of the bonding area, an optimal bonding strategy can be found that can reduce costs, improve production efficiency, optimize design and improve safety while meeting the performance requirements of the battery pack.

[0055] Furthermore, the battery bonding test system also includes at least one limit bar group, the limit bar group includes two limit bars 7, the two limit bars 7 are detachably connected to the carrying device, the two limit bars 7 are arranged at intervals along the second direction, each limit bar 7 is extended along the first direction, and the two limit bars 7 and the carrying device are surrounded to form a bonding area. The detachable design of the limit bars 7 enables the system to flexibly adapt to the testing of battery cells 4 of different sizes, thereby improving the versatility and adaptability of the equipment.

[0056] like Figure 2 As shown, through the relative positions of the two limiting strips 7 on the supporting device, one or more bonding areas can be accurately formed at the bottom of the battery cell 4. These bonding areas are spaced apart along the length direction of the battery cell 4 and extend along the thickness direction, thereby ensuring the accurate positioning of the battery cell 4 during bonding and limiting the application range of the adhesive.

[0057] The two limit strips 7 are detachably connected to the bearing device, such as by magnetic adsorption, snaps or special fixings. This design allows the experimenter to quickly adjust the position of the limit strips 7 or replace the limit strips 7 of different sizes as needed to form bonding areas of different sizes and positions.

[0058] The limit strip 7 is usually made of metal materials (such as stainless steel, aluminum alloy) or non-metallic materials (such as polycarbonate, nylon) with certain elasticity and rigidity to ensure that it is not easily deformed during use, and at the same time can withstand a certain force to keep the shape and position of the limit strip 7 stable.

[0059] The thickness of the limiting strip 7 is usually very thin to reduce the impact on the bonding area at the bottom of the battery cell 4, generally about 0.8 mm. The length and width need to be customized according to the size of the battery cell 4 and the expected bonding area size in the experiment to ensure that the bonding area can be accurately enclosed.

[0060] In a specific embodiment, assuming that the size of the battery cell in the experiment is 300mm (length) x 100mm (width), the limit strip group is designed as two limit strips 7 with a thickness of 0.8mm, and the length of the limit strip 7 covers the entire width direction of the bottom of the battery cell (100mm), and the width can be adjusted according to the needs of the experiment. First, two limit strips 7 are placed on the carrier so that they are spaced apart along the length direction of the battery cell 4 to form a bonding area with a width of 50mm, which is used to test the performance of the full-width adhesive in the first experiment. Subsequently, the experimenter can adjust the position of the limit strip 7 to test the performance of the half-width adhesive. In subsequent experiments, the position of the limit strip 7 can be further adjusted to form a bonding area with a smaller width or a different position to test the specific effects of different adhesive layouts on the vibration stability of the battery cell 4.

[0061] In the above manner, the limit strip 7 not only plays a role in accurately controlling the adhesive range in the experiment, but also provides a means for the experimenter to adjust the adhesive layout and optimize the amount of adhesive, thereby improving the efficiency of battery pack design and reducing production costs. In the experiment, the vibration displacement, adhesive strength and other data of the battery cell 4 under different adhesive area layouts can be collected and analyzed in depth to provide a scientific basis for the structural optimization of the battery pack.

[0062] Specifically, the bearing device includes two bottom beams 5, the two bottom beams 5 are spaced apart along the second direction, each bottom beam 5 is extended along the first direction, each bottom beam 5 is connected to the limit device, and at least one bonding area is formed on at least one of the two bottom beams 5. The design of the bottom beam 5 not only provides sufficient supporting force, but also can disperse the weight of the battery cell 4, avoid local overload, and ensure safety and stability during the test.

[0063] like Figure 1 As shown, two bottom beams 5 are arranged at intervals along the second direction, i.e., the length direction of the battery cell 4, and both extend along the first direction, and they form a bonding area together with the stopper 1. A bonding area is provided on at least one bottom beam 5, and the bonding range between the battery cell 4 and the bottom beam 5 can be controlled by adjusting the position and number of the bonding area, so as to study the influence of different bonding layouts on the fixing effect of the battery cell 4.

[0064] It should be further explained that corresponding bolt holes are designed on the bottom beam 5 and the stopper 1. The positions of the bolt holes need to be precisely aligned to ensure that the bolts can pass through and fix the two components. The diameter of the hole should be slightly larger than the diameter of the bolt to allow the bolt to fine-tune its position in the hole. At the same time, the edges of the hole need to be chamfered to prevent the bolts from damaging the surface of the component during tightening.

[0065] The bolted connection between the bottom beam 5 and the limiter 1 is more flexible and suitable for scenarios where the position of the experimental device needs to be frequently adjusted or maintenance and disassembly are required. By adjusting the tightness of the bolts, the position of the bottom beam 5 can be easily adjusted while ensuring the stability of the connection.

[0066] Optionally, the bottom beam 5 is provided with a plurality of flanges, and the entire system can be welded to the inside of the battery box by welding at the flanges. The welding fixation method is suitable for scenarios requiring long-term stable connection, and can provide extremely high connection strength and reliability, but once the welding is completed, it is difficult to adjust the position or disassemble.

[0067] The flange design of the bottom beam 5 usually refers to turning over the edge or specific position of the bottom beam 5 to form a vertical or inclined reinforcement structure. These flanges can be single-sided or double-sided, and their main function is to increase the rigidity of the bottom beam 5 and prevent deformation when subjected to preload or vibration. The thickness and width of the flanges need to be determined according to the load and vibration intensity of the experimental device to ensure the stability of the structure.

[0068] Specifically, the carrying device is a flat plate. The carrying device of the flat plate structure is not only low in cost but also easy to clean and maintain.

[0069] In an optional embodiment, the carrier is in the form of a flat plate instead of the bottom beam 5. The flat plate carrier also has an adhesive area for bonding the battery cell 4, but its structure is simpler and is suitable for situations where a large area of ​​the bottom of the battery cell 4 needs to be in contact with the adhesive. The flat plate carrier supports the battery cell 4 through its own rigidity and cooperates with the limit device to ensure the stability of the battery cell on the vibration table.

[0070] According to different experimental requirements, the bottom beam 5 and the flat plate can be easily switched to achieve the best experimental effect.

[0071] Furthermore, the battery bonding test system also includes a pre-tightening device, which is connected to both limit members 1, and is used to adjust the size of the two limit spaces to adjust the pre-tightening force of the two limit members 1 on the battery cell 4. The pre-tightening device controls the pre-tightening force on the battery cell 4 by adjusting the size of the space between the two limit members 1 (battery cell side supports), that is, the limit space, so as to ensure the stability of the battery cell 4 during the vibration test, avoid displacement or damage of the battery cell caused by vibration, and also ensure the accuracy and repeatability of the bonding test.

[0072] By adjusting the preload force, the stress conditions of the battery cell 4 under different working conditions can be simulated, providing a more realistic test environment for the bonding experiment.

[0073] Specifically, the pre-tightening device includes a bolt 2 and a nut 3, and bolt holes are provided on the two limit members 1. The first end of the bolt 2 abuts against one of the limit members 1 and is inserted into the two bolt holes. The second end of the bolt 2 is connected to the nut 3, and one side of the nut 3 abuts against the other limit member 1. The distance between the two limit members 1 can be adjusted by adjusting the screw-in distance between the nut 3 and the bolt 2. This pre-tightening device has a simple structure, is easy to operate, can accurately control the size of the pre-tightening force, is suitable for fine adjustment in a laboratory environment, and can provide stable and controllable test conditions, especially when conducting an optimization experiment on the bonding performance of the battery cell 4.

[0074] The first end of the bolt 2 is designed to be flat, which is used to abut against the limiter, ensuring that the bolt 2 can stably contact the limiter 1 during the tightening process to transmit the preload force. The other end of the bolt 2 has a thread for connecting with the nut 3. By rotating the nut 3, the insertion depth of the bolt 2 in the limiter 1 can be changed, thereby adjusting the spacing between the two limiters 1. By rotating the nut 3, the screw-in distance between the nut 3 and the bolt 2 can be adjusted, thereby changing the relative position between the two limiters 1 and achieving the adjustment of the size of the preload force.

[0075] When the preload needs to be increased, that is, the distance between the two limiters 1 needs to be reduced, the nut 3 can be rotated to move the nut 3 along the thread of the bolt 2 toward the limiter until the nut 3 is pressed against the other limiter 1. At this time, the combined action of the bolt 2 and the nut 3 pulls the two limiters 1 closer, applying a preload to the battery cell 4 between the two limiters 1. Conversely, when the preload needs to be reduced, that is, the distance between the two limiters 1 needs to be increased, the nut 3 can be rotated in the opposite direction to increase the distance between the nut 3 and the other limiter 1, thereby releasing the preload.

[0076] According to a specific embodiment, the size of the battery cell is 50 mm (thickness)×300 mm (length)×100 mm (width), and the experimental goal is to test the vibration characteristics of the battery cell under different preload forces.

[0077] First, ensure that the bearing device (bottom beam 5) is fixed on the vibration table, and two stoppers 1 are installed on both sides of the battery cell 4. The stoppers 1 are connected to the bottom beam 5 by bolts. Bolt holes are opened on the two stoppers 1 in alignment with the positions of the battery cells 4. The number and position of the bolt holes must ensure the stable fixation of the battery cells 4.

[0078] Place the battery cell 4 on the bottom beam 5, and ensure that the bonding area at the bottom of the battery cell 4 is aligned with the preset position of the bottom beam 5. Then, pass the bolt 2 through the bolt holes on the two stoppers 1, and tighten the nut 3 on the other end of the bolt 2 until the nut 3 is pressed against the other stopper 1 to form a pre-tightened state.

[0079] By rotating the nut 3, the screw-in distance between the nut 3 and the bolt 2 can be adjusted, thereby changing the spacing between the two stoppers 1. For example, tighten the nut 3 until the preload force reaches 10N, and record the relative position between the two stoppers 1 at this time. Then, gradually release the preload force, and test the vibration characteristics of the battery cell 4 under multiple preload force levels such as 5N and 2N.

[0080] Vibration test and data analysis: After the preload adjustment is completed, the vibration table is started for vibration testing. During the test, the displacement, deformation, and bonding strength of the battery cell 4 are recorded. By comparing the test results under different preload levels, the influence of the preload on the vibration characteristics of the battery cell 4 can be analyzed, so as to determine the minimum preload that can ensure the stability of the battery cell 4.

[0081] Based on the data collected from the vibration test, the experimenter can analyze the effects of different adhesive areas and preload on the fixation of the battery cell 4, and evaluate the efficiency and reliability of the adhesive. By comparing the experimental data, the optimal adhesive solution can be determined, that is, while ensuring that the battery cell 4 does not move or fall off under vibration conditions, the amount of adhesive used can be reduced as much as possible, thereby achieving the purpose of reducing costs and improving efficiency.

[0082] Specifically, a buffer member 6 is disposed on one side of the limiting member 1 facing the limiting space. The buffer member 6 can effectively absorb the impact force of the battery cell 4 during the vibration test and protect the battery cell 4 from damage.

[0083] The buffer 6 is usually made of a material with elasticity and damping properties, such as rubber, silicone, foam or special polymer materials, to provide effective buffering and shock absorption effects. It can be designed into different shapes and thicknesses as needed, such as sheets, strips or customized shapes, to adapt to the size of the battery cell 4 and experimental requirements. The buffer 6 is set on the side of the limiter facing the battery cell 4, directly contacting the surface of the battery cell 4.

[0084] When the pre-tightening device (bolt 2 and nut 3) adjusts the distance between the stopper 1 and applies pre-tightening force to the battery cell 4, the buffer 6 can absorb part of the pre-tightening force to prevent the battery cell 4 from being deformed or damaged due to excessive pressure. During the vibration test, the buffer 6 can absorb vibration energy, reduce the direct collision between the battery cell 4 and the stopper 1, and protect the battery cell 4 from stress concentration and fatigue damage caused by vibration.

[0085] According to a specific embodiment, first, ensure that the battery cell 4 is placed on the bottom beam 5, and the bonding area at the bottom is aligned with the preset position of the bottom beam 5. Two stoppers 1 are respectively installed on both sides of the battery cell 4, and the stoppers 1 are connected to the bottom beam 5 by bolts 2 and nuts 3.

[0086] A buffer 6 is installed on the side of the stopper 1 facing the battery core 4. Double-sided tape, adhesive or other suitable fixing methods can be used to firmly attach the buffer 6 to the stopper 1 to ensure that the buffer 6 will not fall off when a preload or vibration is applied.

[0087] By adjusting the preload device, a preload force is applied to the battery cell 4, and the buffer 6 absorbs part of the preload force to prevent the battery cell 4 from being over-extruded. Then, the experimental device is connected to a vibration table to perform a vibration test, and the buffer 6 plays a shock-absorbing role to reduce the impact of vibration on the battery cell 4.

[0088] Record the performance data of the displacement, deformation and bonding area of ​​the battery cell 4 under vibration. By analyzing the data, evaluate the shock absorption effect of the buffer 6 under different preload and vibration conditions to determine whether it effectively protects the battery cell 4. Based on the experimental results, the material, thickness or shape of the buffer 6 can be adjusted to optimize its shock absorption performance and ensure the safety and stability of the battery cell 4 in the vibration test.

[0089] Specifically, the thickness of the limit strip 7 is L1, where 1.0 mm ≥ L1 ≥ 0.6 mm. The thickness L1 of the limit strip 7 is a key parameter, and the preferred range is between 1.0 mm and 0.6 mm. This design ensures that the limit strip group can fit the battery cell 4 tightly, while not hindering the effective bonding between the battery cell 4 and the supporting device due to excessive thickness.

[0090] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0091] 1. Define the glue area at the bottom of the battery cell by using a limit bar. By adjusting the position of the limit bar, the actual glue area of ​​the contact surface between the bottom of the battery cell and the bottom beam can be changed, so as to test the influence of different glue areas on the fixation effect of the battery cell in the vibration test. In this way, the minimum glue area that can meet the requirements of the vibration test can be obtained, thereby reducing the use of glue materials and the manufacturing cost of the battery pack while ensuring the stability of the power battery structure.

[0092] 2. A buffer is provided on the side of the limiter facing the battery cell, which can effectively absorb the preload and vibration energy, reduce the direct collision and pressure between the battery cell and the limiter, and protect the battery cell from stress concentration and damage caused by excessive preload and vibration, thereby ensuring the accuracy of the experimental data and the safety of the battery cell.

[0093] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0094] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0095] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0096] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery bonding test system, characterized in that: include: A limiting device, the limiting device comprising two limiting members (1), the two limiting members (1) being arranged opposite to each other along a first direction, and a limiting space for accommodating at least one battery cell (4) being formed between the two limiting members (1); A load-bearing device, the load-bearing device is located at the bottom of the limiting device, the load-bearing device is connected to the limiting device, at least one bonding area is formed on the load-bearing device, and when the battery cell (4) is located in the limiting space, the battery cell (4) is bonded to the load-bearing device through the adhesive in the bonding area; A vibration table is connected to the bearing device, and is used to simulate vehicle body vibration of at least one degree of freedom.

2. The battery bonding test system according to claim 1, characterized in that: There are a plurality of bonding areas, the plurality of bonding areas are arranged at intervals along the second direction, and each of the bonding areas is extended along the first direction.

3. The battery bonding test system according to claim 2, characterized in that: The first direction is the thickness direction of the battery core (4), and / or the second direction is the length direction of the battery core (4).

4. The battery bonding test system according to claim 2, characterized in that: The battery bonding test system further comprises at least one limit bar group, wherein the limit bar group comprises two limit bars (7), the two limit bars (7) are both detachably connected to the carrying device, the two limit bars (7) are spaced apart along the second direction, each limit bar (7) is extended along the first direction, and the two limit bars (7) and the carrying device are arranged to form a bonding area.

5. The battery bonding test system according to claim 2, characterized in that: The bearing device comprises two bottom beams (5), the two bottom beams (5) are arranged at intervals along the second direction, each of the bottom beams (5) is extended along the first direction, each of the bottom beams (5) is connected to the limiting device, and at least one of the two bottom beams (5) is formed with at least one of the bonding areas.

6. The battery bonding test system according to claim 1, characterized in that: The carrying device is a flat plate.

7. The battery bonding test system according to claim 1, characterized in that: The battery bonding experimental system further comprises a pre-tightening device, the pre-tightening device being connected to both of the two limiting members (1), and the pre-tightening device being used to adjust the size of the two limiting spaces so as to adjust the pre-tightening force of the two limiting members (1) on the battery cell (4).

8. The battery bonding test system according to claim 7, characterized in that: The pre-tightening device comprises a bolt (2) and a nut (3), wherein the two limiting members (1) are provided with bolt holes, the first end of the bolt (2) abuts against one of the limiting members (1) and is inserted into the two bolt holes, the second end of the bolt (2) is connected to the nut (3), and one side of the nut (3) abuts against the other limiting member (1), wherein the distance between the two limiting members (1) can be adjusted by adjusting the screw-in distance between the nut (3) and the bolt (2).

9. The battery bonding test system according to claim 1 or 4, characterized in that: A buffer member (6) is provided on one side of the limiting member (1) facing the limiting space.

10. The battery bonding test system according to claim 4, characterized in that: The thickness of the limiting strip (7) is L1, wherein 1.0 mm ≥ L1 ≥ 0.6 mm.

Images