Battery cell expansion characteristic testing device

Abstract

The utility model provides a battery cell expansion characteristic testing device. The battery cell expansion characteristic testing device comprises a frame; the clamping mechanism is arranged in the frame and is used for clamping a to-be-tested battery cell; the extrusion mechanisms are movably connected with the frame so as to be capable of moving in the Y-axis direction and the Z-axis direction, the number of the extrusion mechanisms is two, and the two extrusion mechanisms are located on the two sides of the to-be-detected battery cell respectively and used for applying stress to the large faces of the two sides of the to-be-detected battery cell in the X-axis direction respectively. According to the utility model, the problem of inaccurate cell expansion characteristic test in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery cell expansion characteristic testing device. Background Technology

[0002] As electric vehicles develop and their market share increases, people are paying more and more attention to their driving range. Therefore, research and development of battery cell characteristics is crucial and directly related to the driving range of power batteries.

[0003] Current research and verification of prismatic power battery cells mainly focuses on the impact of cell expansion characteristics on the cell. However, most studies on cell expansion characteristics use the constraint of the entire prismatic cell as the test condition, lacking research on the cell under local constraint conditions. However, the cell interior is not uniform, and there is no corresponding testing device for testing the expansion characteristics under local constraint conditions, i.e., the expansion characteristics under uneven cell stress, which leads to inaccurate test results on cell expansion characteristics.

[0004] As can be seen from the above, there is a problem with inaccurate cell expansion characteristic testing in related technologies. Utility Model Content

[0005] The main objective of this invention is to provide a battery cell expansion characteristic testing device to solve the problem of inaccurate battery cell expansion characteristic testing in related technologies.

[0006] To achieve the above objectives, this utility model provides a battery cell expansion characteristic testing device, comprising: a frame; a clamping mechanism disposed within the frame for clamping the battery cell to be tested; and a pressing mechanism movably connected to the frame to move along the Y-axis and Z-axis directions. There are two pressing mechanisms, which are respectively located on both sides of the battery cell to be tested and are used to apply stress to the large surfaces on both sides of the battery cell to be tested along the X-axis direction.

[0007] Furthermore, the frame includes a base plate, vertical beams, and horizontal beams. The vertical beams are placed on the base plate, and the horizontal beams are connected to form a cubic structure. The clamping mechanism is set on the base plate.

[0008] Furthermore, the crossbeam and the base plate are provided with corresponding first slide rails and first sliders. The first slide rails extend along the Y-axis direction, and the first sliders are slidably connected to the first slide rails. The cell expansion characteristic testing device also includes a first guide rod, which passes through the extrusion mechanism and is connected to two first sliders at both ends, so that the extrusion mechanism can move along the first slide rails.

[0009] Furthermore, the connection between the first slider and the first guide rod on the base plate overlaps vertically with the connection between the first slider and the first slide rail on the base plate.

[0010] Furthermore, a buffer is provided on the first slider located on the base plate. The buffer is vertically arranged and is used to provide buffering force when the extrusion mechanism falls.

[0011] Furthermore, on the vertical beam located on the same side of the frame, there are corresponding second slide rails and second sliders. The second slide rails extend along the Z-axis direction, and the second sliders are slidably connected to the second slide rails. The cell expansion characteristic testing device also includes a second guide rod, which passes through the extrusion mechanism and is connected to the two second sliders at both ends, so that the extrusion mechanism can move along the second slide rails.

[0012] Furthermore, the extrusion mechanism is provided with a locking element, which is used to keep the extrusion mechanism in the preset position after it moves to the preset position along the Y-axis or Z-axis.

[0013] Furthermore, the extrusion mechanism includes: a main plate; a pressure plate, which applies stress to the large surface of the battery cell under test; a support plate, on the side of the support plate near the pressure plate, a pressure detection element is provided to detect the magnitude of the stress borne by the large surface of the battery cell under test; a third guide rod, which passes sequentially through the main plate and the support plate along the X-axis and is fixedly connected to the pressure plate at one end; and a first screw, on the main plate, a screw sleeve is provided, the first screw is threadedly connected to the screw sleeve and abuts against the support plate at one end, and the first screw pushes the support plate and the pressure plate to move along the third guide rod.

[0014] Furthermore, the pressure plate has multiple mounting holes for connecting with the clamping plate of the clamping mechanism.

[0015] Furthermore, a limiting component is fitted at the other end of the third guide rod, and the limiting component is a limiting stop with the main body plate.

[0016] Furthermore, the extrusion mechanism also includes a rocker arm, which is connected to the other end of the first screw and is used to drive the first screw to rotate.

[0017] Furthermore, the clamping mechanism includes: a base frame; a lifting platform, which is movably connected to the base frame; and a clamping component, which is disposed on the lifting platform and used to clamp the battery cell to be tested.

[0018] Furthermore, the clamping component includes: a base on which the battery cell to be tested is placed; four clamping blocks arranged in pairs, with each pair of clamping blocks connected to both ends of the base and connected by fasteners; the clamping blocks having notches that fit the edges and corners of the battery cell to be tested; two clamping plates located on both sides of the battery cell to be tested and connected to the pressing mechanism; and a bakelite pad disposed between the clamping plates and the battery cell to be tested.

[0019] Furthermore, the clamping mechanism also includes a fourth guide rod and a second screw. The fourth guide rod and the second screw are respectively installed on the base frame and one end is connected and fixed to the lifting platform. A nut is sleeved on the second screw, and the nut and the base frame limit stop are used to adjust the height of the lifting platform.

[0020] The present invention provides a battery cell expansion characteristic testing device comprising a frame, a clamping mechanism, and a pressing mechanism. The clamping mechanism is located within the frame and is used to clamp the battery cell under test. The pressing mechanism is movably connected to the frame and can move along the Y-axis and Z-axis directions. There are two pressing mechanisms, located on opposite sides of the battery cell under test, respectively, to apply stress to the large surfaces of the battery cell on both sides along the X-axis direction. By setting the pressing mechanism to be movable along the Y-axis and Z-axis directions, it can be moved to a local position on the large surface of the battery cell under test according to the testing requirements, and then apply corresponding stress to the large surface of the battery cell under test along the X-axis direction. This allows adjustment of the contact area of ​​the large surface of the battery cell under test to bear stress, thereby enabling the testing of the expansion characteristics of the battery cell under local constraints, i.e., the expansion characteristics under uneven stress conditions. This greatly improves the accuracy of battery cell expansion characteristic testing and solves the problem of inaccurate battery cell expansion characteristic testing in related technologies. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0022] Figure 1 A schematic diagram of the structure of a cell expansion characteristic testing device according to a specific embodiment of the present invention is shown at one angle.

[0023] Figure 2 A schematic diagram of the framework according to a specific embodiment of the present invention is shown;

[0024] Figure 3 This diagram shows a structural schematic of a cell expansion characteristic testing device according to a specific embodiment of the present invention from another angle.

[0025] Figure 4 A schematic diagram of the extrusion mechanism at one angle according to a specific embodiment of the present invention is shown;

[0026] Figure 5 A structural schematic diagram of the extrusion mechanism according to another specific embodiment of the present invention is shown from another angle;

[0027] Figure 6 A schematic diagram of the clamping mechanism concealing the battery cell under test according to a specific embodiment of the present invention is shown;

[0028] Figure 7 A schematic diagram of the clamping mechanism according to a specific embodiment of the present invention is shown;

[0029] Figure 8 A partial structural schematic diagram of a clamping mechanism according to a specific embodiment of the present invention is shown.

[0030] In the instruction manual PN287593HWYWLN, the above-mentioned drawings include the following reference numerals:

[0031] 10. Frame; 11. Base plate; 12. Vertical beam; 13. Horizontal beam; 14. Handle; 20. Clamping mechanism; 21. Base frame; 22. Lifting platform; 23. Base; 24. Clamping block; 25. Clamping plate; 26. Bakelite pad; 27. Fourth guide rod; 28. Second screw; 29. ​​Nut; 30. Extrusion mechanism; 31. Main plate; 311. First linear bearing; 312. Second linear bearing; 32. Pressure plate; 321. Mounting hole; 33. Support plate; 34. Pressure detection element; 35. Third guide rod; 351. Limiting component; 36. First screw; 37. Screw sleeve; 38. Rocker arm; 39. Locking component; 40. First slide rail; 50. First slider; 51. Buffer component; 60. First guide rod; 70. Second slide rail; 80. Second slider; 90. Second guide rod; 100. Battery cell under test. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0033] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0035] To address the problem of inaccurate cell expansion characteristic testing in related technologies, this invention provides a cell expansion characteristic testing device.

[0036] like Figure 1 As shown, the battery cell expansion characteristic testing device includes a frame 10, a clamping mechanism 20, and a pressing mechanism 30. The clamping mechanism 20 is disposed within the frame 10 and is used to clamp the battery cell 100 to be tested. The pressing mechanism 30 is movably connected to the frame 10 so as to be able to move along the Y-axis and Z-axis directions. There are two pressing mechanisms 30, which are respectively located on both sides of the battery cell 100 to be tested, and are used to apply stress to the large surfaces on both sides of the battery cell 100 to be tested along the X-axis direction.

[0037] The battery cell expansion characteristic testing device includes a frame 10, a clamping mechanism 20, and a pressing mechanism 30. The clamping mechanism 20 is located inside the frame 10 and is used to clamp the battery cell 100 under test. The pressing mechanism 30 is movably connected to the frame 10 so that it can move along the Y-axis and Z-axis directions. There are two pressing mechanisms 30, which are located on both sides of the battery cell 100 under test, respectively, and are used to apply stress to the large surfaces on both sides of the battery cell 100 under test along the X-axis direction. By setting the pressing mechanism to be movable along the Y-axis and Z-axis directions, it can be moved to a local position on the large surface of the battery cell 100 under test according to the test requirements, and then apply the corresponding stress to the large surface of the battery cell 100 under test along the X-axis direction. This allows adjustment of the contact area of ​​the large surface of the battery cell 100 under test to bear the stress, thereby realizing the testing of the expansion characteristics of the battery cell under local constraint, i.e., the expansion characteristics of the battery cell under uneven stress, greatly improving the accuracy of the battery cell expansion characteristic test.

[0038] It should be noted that, as Figure 3As shown, the Y-axis direction is the left-right direction in the figure, the Z-axis direction is the up-down direction in the figure, and the X-axis direction is the front-back direction in the figure.

[0039] like Figures 6 to 8 As shown, the clamping mechanism 20 includes a base frame 21, a lifting platform 22, and clamping components. The base frame 21 is fixedly connected to the base plate 11. The lifting platform 22 is movably connected to the base frame 21. The clamping components are mounted on the lifting platform 22 and are used to clamp the battery cell 100 to be tested.

[0040] like Figures 6 to 8 As shown, the clamping components include a base 23, clamping blocks 24, clamping plates 25, and bakelite pads 26. The battery cell 100 to be tested is placed on the base 23. There are four clamping blocks 24 arranged in pairs, with each pair connected to both ends of the base 23. Each pair of clamping blocks 24 is connected by fasteners. The clamping blocks 24 have notches that fit the corners of the battery cell 100 under test, thus using the inclined angle of the contact surface to clamp the rounded corner areas of the battery cell 100. This ensures the battery cell is clamped tightly without tipping over. There are two clamping plates 25, located on both sides of the battery cell 100 under test and connected to the pressing mechanism 30. The bakelite pads 26 are positioned between the clamping plates 25 and the battery cell 100 under test. Specifically, the fasteners are bolts.

[0041] In this embodiment, the bakelite pad 26 has different specifications and dimensions for different battery cells to be tested, and the bakelite pad 26 can ensure the insulation requirements of battery cell testing.

[0042] like Figures 6 to 7 As shown, the clamping mechanism 20 also includes a fourth guide rod 27 and a second screw 28. The fourth guide rod 27 and the second screw 28 are respectively inserted through the base frame 21 and one end is connected and fixed to the lifting platform 22. Specifically, there are four fourth guide rods 27, which are respectively inserted through the four corners of the base frame 21 and connected and fixed to the four corners of the lifting platform 22, thereby ensuring the stability of the vertical movement of the lifting platform 22. Correspondingly, a linear bearing is provided at the connection between the base frame 21 and the fourth guide rod 27, and the fourth guide rod 27 passes through the linear bearing.

[0043] Furthermore, a nut 29 is fitted onto the second screw 28, and the nut 29 serves as a stop against the base frame 21, used to adjust the height of the lifting platform 22. Specifically, there are two second screws 28, located on either side of the middle of the base frame 21. Tightening the nut 29 provides an upward thrust to the second screw 28 (as per the instruction manual PN287593HWYWLN), or loosening the nut 29 causes the second screw 28 to descend, thereby driving the lifting platform 22 to move up and down.

[0044] In this embodiment, the clamping plate 25 can be a flat plate of different shapes or an irregularly shaped plate with uneven contact surfaces.

[0045] like Figure 2 As shown, the frame 10 includes a base plate 11, vertical beams 12, and horizontal beams 13. The vertical beams 12 are erected on the base plate 11, and the horizontal beams 13 are connected to form a cubic structure. The clamping mechanism 20 is disposed on the base plate 11. Specifically, in this embodiment, the frame 10 includes four vertical beams 12 and four horizontal beams 13, wherein the four vertical beams 12 are respectively erected at the four corners of the base plate 11, and the four horizontal beams 13 are connected to the top ends of the four vertical beams 12.

[0046] like Figures 1 to 3 As shown, the crossbeam 13 and the base plate 11 are provided with corresponding first slide rails 40 and first sliders 50. The first slide rails 40 extend along the Y-axis, and the first sliders 50 are slidably connected to the first slide rails 40. The cell expansion characteristic testing device also includes a first guide rod 60, which passes through the extrusion mechanism 30 and is connected at both ends to the two first sliders 50, so that the extrusion mechanism 30 can move along the first slide rails 40. It can be understood that the first guide rod 60 is vertically arranged, and the extrusion mechanism 30 can move up and down along the first guide rod 60.

[0047] Specifically, in this embodiment, the cell expansion characteristic testing device has two pairs of first slide rails 40 and first sliders 50. The two pairs of first slide rails 40 are respectively arranged on two crossbeams 13 and base plate 11 on opposite sides. There are also two pairs of first guide rods 60, which are respectively inserted into two extrusion mechanisms 30. The two first guide rods 60 in one pair are located at both ends of the extrusion mechanism 30 to ensure the stability of the extrusion mechanism 30 moving up and down.

[0048] Furthermore, the connection between the first slider 50 and the first guide rod 60 on the base plate 11 overlaps vertically with the connection between the first slider 50 and the first slide rail 40 on the base plate 11. It is understood that the entire weight of the extrusion mechanism 30 is released at this position. If the connection between the first slider 50 and the first guide rod 60 on the base plate 11 is misaligned with the connection between the first slider 50 and the first slide rail 40 on the base plate 11, the slider-slide rail pair on the base plate 11 will tilt and overturn. Correspondingly, the slider-slide rail pair on the crossbeam 13 does not require the above-mentioned configuration.

[0049] In this embodiment, as per instruction manual PN287593HWYWLN, the first slide rail 40 on the crossbeam 13 is disposed on the upper side of the crossbeam 13, and the connection between the corresponding first slider 50 and the first slide rail 40 is offset from the connection between the first slider 50 and the first slide rail 40 located on the crossbeam 13, as shown below. Figure 2 As shown.

[0050] like Figures 2 to 3As shown, a buffer 51 is provided on the first slider 50 located on the base plate 11. The buffer 51 is vertically arranged and is used to provide cushioning force when the extrusion mechanism 30 falls. By setting the buffer 51, it is possible to prevent the extrusion mechanism 30 from accidentally falling and injuring people during the movement.

[0051] like Figures 1 to 3 As shown, a second slide rail 70 and a second slider 80 corresponding to each other are provided on the vertical beam 12 on the same side of the frame 10. The second slide rail 70 extends along the Z-axis direction, and the second slider 80 is slidably connected to the second slide rail 70. The battery cell expansion characteristic testing device also includes a second guide rod 90, which passes through the extrusion mechanism 30 and is connected to the two second sliders 80 at both ends, so that the extrusion mechanism 30 can move along the second slide rail 70.

[0052] Specifically, in this embodiment, the cell expansion characteristic testing device has two pairs of second slide rails 70 and a second slider 80, with the two pairs of second slide rails 70 respectively disposed on two sets of vertical beams 12 on opposite sides. There are two second guide rods 90, which are respectively inserted into the two extrusion mechanisms 30. The second guide rods 90 are located at the top of the extrusion mechanism 30 to avoid other components of the extrusion mechanism 30.

[0053] In this embodiment, a U-shaped hole is provided in the connector between the guide rod and the slider to overcome the positional error on both sides and thus ensure the smooth movement of the guide rod.

[0054] like Figures 4 to 5 As shown, the extrusion mechanism 30 includes a main plate 31, a pressure plate 32, a support plate 33, a third guide rod 35, and a first screw 36. The main plate 31, pressure plate 32, and support plate 33 are spaced apart and vertically arranged. The pressure plate 32 is used to apply stress to the large surface of the battery cell 100 under test. A pressure detection element 34 is provided on the side of the support plate 33 near the pressure plate 32 to detect the magnitude of the stress borne by the large surface of the battery cell 100 under test. The third guide rod 35 passes through the main plate 31 and the support plate 33 sequentially along the X-axis and is fixedly connected to the pressure plate 32 at one end. A screw sleeve 37 is provided on the main plate 31, and the first screw 36 is threadedly connected to the screw sleeve 37 and abuts against the support plate 33 at one end. The first screw 36 pushes the support plate 33 and the pressure plate 32 to move along the third guide rod 35.

[0055] Instruction manual PN287593HWYWLN

[0056] Specifically, in this embodiment, there are four third guide rods 35, which are respectively inserted through the four corners of the support plate 33 and connected to the four corners of the pressure plate 32. Furthermore, linear bearings are provided at the connection points between the third guide rods 35 and the main body plate 31 and the support plate 33, with the third guide rods 35 passing through the linear bearings to allow the main body plate 31 and the support plate 33 to move more smoothly and stably relative to the third guide rods 35.

[0057] like Figures 4 to 5 As shown, the pressure plate 32 has multiple mounting holes 321 for connecting to the clamping plate 25 of the clamping mechanism 20. Specifically, the mounting holes 321 are threaded holes.

[0058] like Figures 3 to 5 As shown, the extrusion mechanism 30 is equipped with a first linear bearing 311 and a second linear bearing 312. The first guide rod 60 and the second guide rod 90 are respectively passed through the first linear bearing 311 and the second linear bearing 312, so that the extrusion mechanism 30 can move more smoothly and stably relative to the first guide rod 60 and the second guide rod 90.

[0059] Furthermore, such as Figures 3 to 4 As shown, the extrusion mechanism 30 is equipped with a locking element 39, which is used to hold the extrusion mechanism 30 in a preset position after it moves along the Y-axis or Z-axis. Specifically, the locking element 39 is a bearing retaining ring, and there are multiple bearing retaining rings, located at both ends of the first linear bearing 311 and the second linear bearing 312, respectively. When the extrusion mechanism 30 moves to the preset position, the bearing retaining rings are locked to ensure that the extrusion mechanism 30 remains in the current position.

[0060] like Figure 5 As shown, a limiting member 351 is fitted onto the other end of the third guide rod 35, and the limiting member 351 is positioned to stop the main body plate 31. One end of the third guide rod 35 is fixed to the pressure plate 32, while the other end slides freely. To prevent the third guide rod 35 from detaching from the main body plate 31, a limiting member 351 is provided at the freely sliding end of the third guide rod 35. Specifically, the limiting member 351 is a limiting piece.

[0061] like Figures 4 to 5 As shown, the extrusion mechanism 30 also includes a rocker arm 38, which is connected to the other end of the first screw 36 and is used to drive the first screw 36 to rotate.

[0062] Specifically, the extrusion mechanism 30 is first moved along the first guide rod 60 and the second guide rod 90 to a preset position and fixed. Then, the first screw 36 is rotated to push the support plate 33 forward, thereby causing the pressure detection element 34 on the support plate 33 to press the last pressure plate 32, thus applying stress to the large surface of the battery cell 100 to be tested.

[0063] like Figures 2 to 3 As shown, the frame 10 also includes handles 14, which are disposed on the vertical beams 12. Specifically, in this embodiment, handles 14 are provided on all four vertical beams 12, that is, the handles 14 are divided into two groups of two on both sides of the frame 10, so as to facilitate the operator to move and transport the entire cell expansion characteristic testing device.

[0064] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: By setting the battery cell expansion characteristic testing device including a frame 10, a clamping mechanism 20 and a squeezing mechanism 30, the clamping mechanism 20 is set inside the frame 10 and is used to clamp the battery cell 100 to be tested. The squeezing mechanism 30 is movably connected to the frame 10 so that it can move along the Y-axis and Z-axis directions. There are two squeezing mechanisms 30, which are respectively located on both sides of the battery cell 100 to be tested, and are used to apply stress to the large surfaces on both sides of the battery cell 100 to be tested along the X-axis direction. In this way, by setting the squeezing mechanism to be movable along the Y-axis and Z-axis directions, it can be moved to a local position on the large surface of the battery cell 100 to be tested according to the test requirements, and then apply the corresponding stress to the large surface of the battery cell 100 to be tested along the X-axis direction, thereby adjusting the contact area of ​​the large surface of the battery cell 100 to bear the stress, and thus realizing the testing of the expansion characteristics of the battery cell under local constraints, that is, the expansion characteristics of the battery cell under uneven stress, which greatly improves the accuracy of the battery cell expansion characteristic test.

[0065] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0066] For ease of description, the specification PN287593HWYWLN uses spatial relative terms such as "above," "over," "on the upper surface," "above," etc., to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0067] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0068] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An electrode swelling property testing device characterized by comprising: The utility model relates to a kind of battery swelling characteristic testing device, including: Frame (10); Clamping mechanism (20), the clamping mechanism (20) is arranged in the frame (10), for clamping to be measured battery (100); Extrusion mechanism (30), the extrusion mechanism (30) is movably connected with the frame (10), to be able to move along Y axis direction and Z axis direction, the extrusion mechanism (30) is two, two the extrusion mechanism (30) is located at the two sides of the to be measured battery (100) respectively, for respectively along X axis direction to the two sides of the to be measured battery (100) large surface applies stress.

2. The battery cell swelling characteristics testing device according to claim 1, wherein, The frame (10) includes bottom plate (11), vertical beam (12) and crossbeam (13), the vertical beam (12) is vertically arranged on the bottom plate (11), the crossbeam (13) and the vertical beam (12) are connected to form a cubic structure, and the clamping mechanism (20) is arranged on the bottom plate (11).

3. The battery cell swelling characteristics testing device of claim 2, wherein, The crossbeam (13) and the bottom plate (11) are provided with first slide rail (40) and first sliding block (50) corresponding in upper and lower, the first slide rail (40) extends along the Y axis direction, the first sliding block (50) is slidably connected with the first slide rail (40), and the battery swelling characteristic testing device further includes first guide rod (60), the first guide rod (60) is arranged in the extrusion mechanism (30) and is connected with two first sliding blocks (50) at both ends respectively, so that the extrusion mechanism (30) moves along the first slide rail (40).

4. The battery cell swelling characteristics testing apparatus according to claim 3, characterized by, The connection of the first sliding block (50) and the first guide rod (60) on the bottom plate (11) overlaps the connection of the first sliding block (50) and the first slide rail (40) on the bottom plate (11) in upper and lower.

5. The battery cell swelling characteristics testing apparatus according to claim 3, wherein The first sliding block (50) on the bottom plate (11) is provided with buffer (51), and the buffer (51) is vertically arranged to provide buffering force when the extrusion mechanism (30) falls.

6. The battery cell swelling characteristics testing apparatus according to claim 2, wherein The vertical beam (12) on the same side of the frame (10) is provided with second slide rail (70) and second sliding block (80) corresponding in left and right, the second slide rail (70) extends along the Z axis direction, the second sliding block (80) is slidably connected with the second slide rail (70), and the battery swelling characteristic testing device further includes second guide rod (90), the second guide rod (90) is arranged in the extrusion mechanism (30) and is connected with two second sliding blocks (80) at both ends respectively, so that the extrusion mechanism (30) moves along the second slide rail (70).

7. The battery cell swelling characteristics testing apparatus according to claim 1, wherein The extrusion mechanism (30) is provided with locking piece (39), and the locking piece (39) is used to keep in preset position after the extrusion mechanism (30) moves to the preset position along the Y axis direction or the Z axis direction.

8. The battery cell swelling characteristics testing apparatus according to claim 1, wherein, The extrusion mechanism (30) includes: Main body plate (31); Pressing plate (32), the pressing plate (32) is used to apply stress to the large surface of the to be measured battery (100); A support plate (33) is provided with a pressure detection element (34) on the side close to the pressing plate (32) for detecting the stress on the large surface of the battery to be tested (100); A third guide rod (35) is sequentially arranged in the main body plate (31) and the support plate (33) along the X-axis direction and is fixed at one end to the pressing plate (32); A first screw rod (36) is arranged on the main body plate (31) and is threadedly connected to a threaded sleeve (37) and abuts at one end to the support plate (33), and the first screw rod (36) drives the support plate (33) and the pressing plate (32) to move along the third guide rod (35).

9. The battery cell swelling characteristics testing apparatus according to claim 8, wherein, A plurality of mounting holes (321) are arranged on the pressing plate (32) for connecting to the clamping plate (25) of the clamping mechanism (20).

10. The battery cell swelling characteristics testing apparatus according to claim 8, wherein, The other end of the third guide rod (35) is sleeved with a limiting piece (351) which is limited and stopped by the main body plate (31).

11. The battery cell swelling characteristics testing apparatus according to claim 8, wherein The pressing mechanism (30) further comprises a rocker arm (38) connected to the other end of the first screw rod (36) for driving the first screw rod (36) to rotate.

12. The battery cell swelling characteristics testing apparatus according to claim 1, wherein, The clamping mechanism (20) comprises: a chassis (21); a lifting platform (22) movably connected to the chassis (21); a clamping piece arranged on the lifting platform (22) for clamping the battery to be tested (100).

13. The battery cell swelling characteristics testing apparatus according to claim 12, wherein, The clamping piece comprises: a base (23) on which the battery to be tested (100) is placed; four clamping blocks (24) arranged in pairs, two pairs of clamping blocks (24) are respectively connected to the two ends of the base (23), and each pair of clamping blocks (24) is connected by a fastener, and the clamping block (24) is provided with a notch part matched with the corner of the battery to be tested (100); two clamping plates (25) respectively arranged on the two sides of the battery to be tested (100) and connected to the pressing mechanism (30); a bakelite pad (26) arranged between the clamping plate (25) and the battery to be tested (100).

14. The battery cell swelling characteristics testing apparatus according to claim 12, wherein, The clamping mechanism (20) further comprises a fourth guide rod (27) and a second screw rod (28), the fourth guide rod (27) and the second screw rod (28) are respectively arranged in the chassis (21) and are fixed at one end to the lifting platform (22), and a nut (29) is sleeved on the second screw rod (28), the nut (29) is limited and stopped by the chassis (21), and is used for adjusting the height of the lifting platform (22).

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