Battery cell cycle performance test fixture

Abstract

The utility model provides a battery cell cycle performance test fixture, which comprises a fixedly arranged lower clamping plate and a movably arranged upper clamping plate, a battery cell to be tested is placed between the upper clamping plate and the lower clamping plate, and the upper clamping plate is connected with an adjusting mechanism; the adjusting mechanism comprises an adjusting lead screw, a lead screw nut and a mounting plate, the mounting plate is fixedly arranged, the lead screw nut is fixedly connected with the mounting plate, the adjusting lead screw is inserted into the lead screw nut, and the first end of the adjusting lead screw is connected with the upper clamping plate. According to the utility model, the stability of the battery cell in the cycle performance test process can be ensured, the cycle process in a module or a system can be better simulated, the structure is simple, the operation is convenient, and the test cost is low and the efficiency is high for the cycle performance test of the battery cell, especially for the small-scale test.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cycle performance test tooling, and particularly relates to a cell cycle performance test fixture. Background Art

[0002] Battery cycle performance test is one of the important indicators for evaluating the battery performance. During the battery cycle, the cycle performance will be affected due to battery heat generation or overall battery appearance deformation. Specifically, when the battery is charged and discharged, heat will be released, and the effectiveness of heat release will affect the battery capacity and rate performance, etc., and to a certain extent, it will affect the accurate evaluation of the cycle performance. And with the increase of the cycle times inside the battery, side reactions will also increase, which will generate a certain amount of gas causing the electrode plate to deform, and the generated gas adheres to the separator, which will affect the cycle performance to a certain extent.

[0003] When testing the cycle performance of a cell, if the cell is not clamped through the corresponding tooling, etc., it is impossible to more accurately simulate the cycle process in the module or system, resulting in inaccurate test results. Summary of the Utility Model

[0004] The purpose of the utility model is: aiming at the deficiencies in the above background art, to provide a tooling that can clamp the cell, make the cell more stable during the cycle performance test, and more accurately simulate the cycle process in the module or system.

[0005] To achieve the above purpose, the utility model provides a cell cycle performance test fixture, which includes a fixed lower clamping plate and a movable upper clamping plate. The cell to be tested is placed between the upper clamping plate and the lower clamping plate, and the upper clamping plate is connected to an adjusting mechanism;

[0006] The adjusting mechanism includes an adjusting screw rod, a screw nut and a mounting plate. The mounting plate is fixedly arranged, the screw nut is fixedly connected to the mounting plate, the adjusting screw rod is inserted into the screw nut, and the first end of the adjusting screw rod is connected to the upper clamping plate.

[0007] Further, a adjusting handwheel is further arranged at the second end of the adjusting screw rod, and the adjusting handwheel is used for manual rotation.

[0008] Further, a connecting sleeve is arranged at the bottom of the adjusting handwheel, corresponding bolt through holes are formed in both the connecting sleeve and the top end of the adjusting screw rod, and mounting bolts are inserted into the bolt through holes and fixed by mounting nuts.

[0009] Further, a guiding column is further arranged between the mounting plate and the lower clamping plate, guiding holes corresponding to the guiding column are formed in the upper clamping plate, and the guiding column is inserted into the guiding holes.

[0010] Further, four sets of the guiding columns and the guiding holes are provided.

[0011] Further, through holes are formed in the mounting plate, and threaded holes are also provided. The screw nut is provided with bolt through holes corresponding to the threaded holes, and the screw nut is fixedly connected to the mounting plate through mounting bolts.

[0012] Further, the upper clamping plate is provided with a connecting seat which is also provided with a threaded hole. The connecting seat is equipped with a connecting plate. The connecting plate is provided with bolt through holes. The connecting plate is fixedly connected to the connecting seat through mounting bolts. A connecting groove is provided at the bottom of the connecting seat. The size of the connecting groove corresponds to the size of the disc provided at the first end of the adjusting screw rod, and is larger than the inner diameter of the through hole of the connecting plate and the outer diameter of the adjusting screw rod.

[0013] Further, clamping grooves are also provided on the supporting surface of the lower clamping plate, and the clamping grooves match the length and width dimensions of the battery cell.

[0014] The above scheme of the present utility model has the following beneficial effects:

[0015] The battery cell cycle performance test fixture provided by the present utility model, through the settings of the upper clamping plate, the lower clamping plate, the adjusting screw rod, etc., when performing the cycle performance test on the battery cell, place the battery cell on the lower clamping plate, and then rotate the adjusting screw rod. The upper clamping plate will move downward under the push of the adjusting screw rod until the battery cell is clamped, forming a certain clamping force on the battery cell in combination with the lower clamping plate. And this clamping force can be maintained by relying on gravity and the thread force of the screw nut. Therefore, the stability of the battery cell during the cycle performance test can be ensured, and the cycle process in the module or system can be better simulated;

[0016] The battery cell cycle performance test fixture provided by the present utility model has the characteristics of simple structure and convenient operation, and has low test cost and high efficiency for the battery cell cycle performance test, especially for small-scale tests;

[0017] Other beneficial effects of the present utility model will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall structural schematic diagram of the present utility model;

[0019] Figure 2 is the enlarged view of part A of the present utility model;

[0020] Figure 3 is the enlarged view of part B of the present utility model.

[0021]

DESCRIPTION OF THE REFERENCE NUMERALS

[0022] 1 - Lower splint; 2 - Upper splint; 3 - Adjusting screw rod; 4 - Screw nut; 5 - Mounting plate; 6 - Adjusting handwheel; 7 - Connecting sleeve; 8 - Guide post; 9 - Guide hole; 10 - Connecting seat; 11 - Connecting plate; 12 - Connecting groove; 13 - Disc; 14 - Clamping groove. Detailed implementation manners

[0023] To make the technical problems, technical solutions and advantages to be solved by the present utility model clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. In addition, the technical features involved in different implementation manners of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a locking connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0026] As Figure 1 shown, the embodiment of the present utility model provides a cell cycle performance test fixture, including a fixedly arranged lower splint 1 and a movably arranged upper splint 2. Among them, the cell to be tested is placed between the upper splint 2 and the lower splint 1, and the cell is clamped by the upper splint 2 and the lower splint 1. At the same time, the distance between the upper splint 2 and the lower splint 1 can be adjusted to adapt to the cell cycle performance tests of different specifications, and different distances can be adjusted to test the influence of the plate distance on the cell cycle performance, etc.

[0027] In this embodiment, the upper clamping plate 2 is connected to the adjusting mechanism to adjust the position of the upper clamping plate 2 through the adjusting mechanism. Specifically in this embodiment, the adjusting mechanism adopts a form driven by a lead screw, and includes an adjusting lead screw 3, a lead screw nut 4, and a mounting plate 5. Among them, the mounting plate 5 is fixedly arranged, the lead screw nut 4 is fixedly connected to the mounting plate 5, the adjusting lead screw 3 is inserted into the lead screw nut 4, and the first end of the adjusting lead screw 3 is connected to the upper clamping plate 2. Therefore, when the adjusting lead screw 3 rotates, the adjusting lead screw 3 can simultaneously axially displace relative to the lead screw nut 4, driving the upper clamping plate 2 to displace synchronously, thereby adjusting the distance between the upper clamping plate 2 and the lower clamping plate 1.

[0028] As a preferred implementation manner of this embodiment, an adjusting handwheel 6 is further provided at the second end of the adjusting lead screw 3. Therefore, the tester can conveniently operate the adjusting handwheel 6 to rotate the adjusting lead screw 3 and axially displace it to a suitable position, driving the upper clamping plate 2 to clamp the battery cell. Among them, a connecting sleeve 7 is provided at the bottom of the adjusting handwheel 6, and corresponding bolt through holes are provided in both the connecting sleeve 7 and the top end of the adjusting lead screw 3. The adjusting handwheel 6 is fixedly connected to the adjusting lead screw 3 by inserting mounting bolts and mounting nuts into the bolt through holes.

[0029] As a preferred implementation manner of this embodiment, a guiding column 8 is further provided between the mounting plate 5 and the lower clamping plate 1. On the one hand, the guiding column 8 connects the mounting plate 5 and the lower clamping plate 1 into a whole. During testing, the fixture can be placed on the test bench, and the whole fixture is supported by the lower clamping plate 1. On the other hand, the guiding column 8 can be used to guide the upper clamping plate 2, so that the upper clamping plate 2 can maintain horizontal when it displaces, especially when clamping the battery cell downward, thereby improving the stability of clamping and testing. Correspondingly, guiding holes 9 corresponding to the guiding column 8 are provided on the upper clamping plate 2, and the guiding column 8 is inserted into the guiding holes 9 to guide the upper clamping plate 2.

[0030] Since the upper clamping plate 2 and the lower clamping plate 1 are preferably set to be rectangular to match the shape of the battery cell, four groups of guiding columns 8, guiding holes 9, etc. are provided in this embodiment, and are respectively arranged or connected at the respective diagonal positions of the rectangle to further improve the stability of support and guidance.

[0031] At the same time, as Figure 2 shown, in a specific implementation manner of this embodiment, through holes are provided on the mounting plate 5, and threaded holes are also provided. The lead screw nut 4 is provided with bolt through holes corresponding to the threaded holes, and the lead screw nut 4 is fixed to the mounting plate 5 by mounting bolts. At the same time, as Figure 3As shown in the figure, the upper clamping plate 2 is provided with a connecting seat 10 which is also provided with a threaded hole. At the same time, the connecting seat 10 is equipped with a connecting plate 11 on which a bolt through-hole is provided. The connecting plate 11 is fixedly connected to the connecting seat 10 by installing bolts. Among them, the bottom of the connecting seat 10 is provided with a connecting groove 12, and the size of the connecting groove 12 corresponds to the size of the disc 13 at the first end of the adjusting screw rod 3, and both are larger than the inner diameter of the through-hole of the connecting plate 11 and the outer diameter of the adjusting screw rod 3. Therefore, after the connecting plate 11 and the connecting seat 10 are fixed, the upper clamping plate 2 can be synchronized with the adjusting screw rod 3 through the connecting groove 12.

[0032] As a preferred implementation mode of this embodiment, a clamping groove 14 can be further provided on the supporting surface of the lower clamping plate 1, and the size of the clamping groove 14 matches the length and width dimensions of the battery cell, so that the battery cell can be placed on the lower clamping plate 1 more stably. When performing a cyclic performance test on the battery cell by using the battery cell cyclic performance test fixture provided by this embodiment, the battery cell is placed on the lower clamping plate 1, and then the adjusting handwheel 6 on the adjusting screw rod 3 is rotated. The upper clamping plate 2 will move downward under the push of the adjusting screw rod 3 until the battery cell is clamped, forming a certain clamping force on the battery cell in combination with the lower clamping plate 1, and this clamping force can be maintained by relying on gravity and the thread force of the screw nut 4. Therefore, the stability of the battery cell during the cyclic performance test can be ensured, and the cyclic process in the module or system can be better simulated.

[0033] At the same time, the battery cell cyclic performance test fixture provided by this embodiment has the characteristics of simple structure and convenient operation, and has a low test cost and high efficiency for the cyclic performance test of battery cells, especially for small-scale tests.

[0034] The technical features of the above embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0035] The above embodiments only represent several implementation modes of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A test fixture for the cycle performance of an electric cell, characterized in that, It includes a fixed lower clamping plate and a movable upper clamping plate. The battery cell to be tested is placed between the upper clamping plate and the lower clamping plate, and the upper clamping plate is connected to an adjusting mechanism; The adjusting mechanism includes an adjusting screw rod, a screw nut and a mounting plate. The mounting plate is fixedly arranged. The screw nut is fixedly connected to the mounting plate. The adjusting screw rod is inserted into the screw nut, and the first end of the adjusting screw rod is connected to the upper clamping plate.

2. The cell cycle performance test fixture according to claim 1, wherein, A regulating handwheel is further arranged at the second end of the adjusting screw rod, and the regulating handwheel is used for being held and rotated.

3. The cell cycle performance test fixture according to claim 2, characterized in that A connecting sleeve is arranged at the bottom of the regulating handwheel. Corresponding bolt through holes are formed in both the connecting sleeve and the top end of the adjusting screw rod. Mounting bolts are inserted into the bolt through holes, and the mounting bolts are fixed by mounting nuts.

4. A cell cycle performance test fixture according to claim 1, characterized in that, Guide posts are further arranged between the mounting plate and the lower clamping plate. Guide holes corresponding to the guide posts are formed in the upper clamping plate, and the guide posts are inserted into the guide holes.

5. The cell cycle performance test fixture according to claim 4, wherein Four groups of the guide posts and the guide holes are provided respectively.

6. The cell cycle performance test fixture according to claim 1, wherein Through holes are formed in the mounting plate, and threaded holes are also provided. The screw nut is provided with bolt through holes corresponding to the threaded holes, and the screw nut is fixedly connected to the mounting plate through mounting bolts.

7. The cell cycle performance test fixture according to claim 1, characterized in that The upper clamping plate is provided with a connecting seat which is also provided with a threaded hole. The connecting seat is provided with a connecting plate in a matching manner. Bolt through holes are formed in the connecting plate. The connecting plate is fixedly connected to the connecting seat through mounting bolts. A connecting groove is formed at the bottom of the connecting seat. The size of the connecting groove corresponds to the size of the disc arranged at the first end of the adjusting screw rod, and both are larger than the inner diameter of the through hole of the connecting plate and the outer diameter of the adjusting screw rod.

8. The cell cycle performance test fixture according to claim 1, wherein A clamping groove is further arranged on the supporting surface of the lower clamping plate, and the clamping groove matches the length and width dimensions of the battery cell.

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