Battery cell expansion displacement testing device
By designing a cell expansion displacement test device with vertical test holes and clamping devices, the problem of insufficient expansion displacement detection in the prior art is solved, and more efficient and accurate cell expansion displacement testing is achieved, which improves the comprehensiveness of the test and data universality.
Patent Information
- Application Number
- CN202420747029.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-11
AI Technical Summary
The existing battery cell expansion testing device mainly detects expansion force and lacks monitoring of expansion displacement, resulting in low testing efficiency and incompleteness, and the characterization data is single and not universal.
A cell expansion displacement test device including two test plates and a clamping device is designed. It contacts the cell surface through the vertical axis of the test hole, and uses multiple test holes for comprehensive testing. The clamping device ensures the stability of the cell. Fix and limit to avoid sliding.
A comprehensive test of the expansion displacement of the battery cell is achieved, which improves the testing efficiency and data accuracy, and ensures that the measured data has higher versatility and accuracy.
Smart Images
Figure CN222188255U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of battery core testing, in particular to a battery core expansion displacement testing device. Background Art
[0002] With the rapid development of the new energy industry, batteries are increasingly used in new energy equipment. During the charge and discharge cycle of the battery, the cell will expand in the thickness direction. There are certain differences in the thickness of the cell under different SOC (i.e. state of charge, used to reflect the remaining capacity of the battery) and SOH (i.e. health level, used to reflect the life decay of the battery) states. This kind of cell size deformation will produce interaction forces with surrounding structural parts. On the one hand, it will affect the cycle life and performance of the cell itself, and on the other hand, it will bring the risk of damage or even failure of surrounding structural parts. Most of the existing cell expansion test fixtures are based on the detection of expansion force, and there are few test fixtures involving cell expansion displacement monitoring. Traditional tests for cell expansion displacement mostly perform single-point tests. The test efficiency is low, the test is not comprehensive, and the characterization data is too single and not universal. Utility Model Content
[0003] The utility model aims to provide a battery cell expansion displacement test device to solve the problems that the conventional battery cell expansion displacement test in the prior art mostly involves single-point testing, low test efficiency, incomplete testing, and overly single characterization data.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0005] A battery cell expansion displacement test device comprises a battery cell, the device comprises two test plates, each of the battery cell test surfaces is provided with one of the test plates, the test plates are provided with a plurality of test holes, the test holes are used to place test pens, the axial direction of the test holes is perpendicular to the battery cell test surface, the size of the test pens matches the size of the test holes, a clamping device is provided between the two test plates, and the battery cell is clamped by the clamping device;
[0006] The battery cells tested by this fixture are square batteries.
[0007] The utility model discloses a device for testing expansion displacement of electric cores. The fixture comprises two testing plates arranged opposite to each other, and a clamping device is arranged between the testing plates. The electric cores can be fixed between the two testing plates by the clamping device. A plurality of testing holes are arranged on the testing plates, and the axial direction of the testing holes is perpendicular to the surface to be tested of the electric cores. The user inserts a testing pen into the testing hole to ensure that the testing pen is in a horizontal state when in contact with the electric cores, and the electric cores are tested through a plurality of testing holes, so that the test is more comprehensive and the measured data is more accurate.
[0008] As a preferred solution of the utility model, a first connecting hole group is provided on the test board, and the clamping device includes a first clamping member, which is connected to the test board through the first connecting hole group. A second connecting hole group is provided on the test board, and the clamping device includes a second clamping member, which is connected to the test board through the second connecting hole group. This arrangement makes the clamping of the battery cell more stable.
[0009] As a preferred solution of the utility model, the first clamping member includes a pair of connecting plates, the connecting plates include a horizontal plate, the lower end of the horizontal plate is connected to a vertical plate, a first limit block is provided on the connecting plate, one side of the first limit block is connected to the side wall of the vertical plate, and one side of the first limit block is connected to the bottom of the horizontal plate. This arrangement prevents the battery cell from being displaced after being clamped.
[0010] As a preferred embodiment of the present invention, the horizontal plate and the vertical plate are spliced to form a accommodating groove, and the first clamping member includes a pair of first clamping strips, each of which is connected to the test board through the first connecting hole group, one end of the first clamping strip is connected to the test board, and the other end forms a first clamping part with the first limit block. This arrangement enables the battery cell to be stably clamped through the cooperation of the first clamping strip and the first limit block.
[0011] As a preferred solution of the utility model, the first connection hole group includes a first connection hole, and third connection holes are provided at both ends of the connection plate. The third connection holes are adapted to the first connection holes. This arrangement makes the connection between the test plate and the clamping device more stable.
[0012] As a preferred solution of the utility model, the first connection hole group includes a second connection hole, and a fourth connection hole is provided at one end of the first clamping strip, and the fourth connection hole is adapted to the second connection hole. This arrangement makes the connection between the test board and the clamping device more stable.
[0013] As a preferred solution of the utility model, the second clamping member includes a base, the base includes a bottom plate, a pair of side plates are symmetrically provided on the upper end of the bottom plate, a second limit block is provided on one side of the side plate, one side of the second limit block is connected to the side plate, and the other side is connected to the bottom plate, the base is connected to the test board through the second connecting hole group, so that the battery cell is limited to prevent sliding after being clamped.
[0014] As a preferred embodiment of the present invention, the second clamping member includes a pair of second clamping strips, one end of the second clamping strip is connected to the test board through the second connecting hole group, and the other end of the second clamping strip and the second limiting block form a second clamping portion. In this way, the second clamping strip and the second limiting block are used to achieve stable clamping of the battery cell.
[0015] As a preferred solution of the utility model, the second connection hole group includes a fifth connection hole, and the end surfaces at both ends of the base are provided with a seventh connection hole, and the seventh connection hole is adapted to the fifth connection hole. This arrangement makes the connection between the test plate and the clamping device more stable.
[0016] As a preferred solution of the utility model, the second connection hole group includes a sixth connection hole, and an eighth connection hole is provided at one end of the second clamping strip, and the eighth connection hole is adapted to the sixth connection hole. This arrangement makes the connection between the test plate and the clamping device more stable.
[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0018] 1. The utility model is a battery cell expansion displacement testing device, which includes two test plates arranged opposite to each other, and a clamping device is provided between the test plates, through which the battery cell can be fixed between the two test plates, and a plurality of test holes are provided on the test plates, and the axial direction of the test holes is perpendicular to the surface to be tested of the battery cell. The user inserts a test pen into the test hole to ensure that the test pen is in a horizontal state when in contact with the battery cell, and the battery cell is tested through a plurality of test holes, which makes the test more comprehensive and the measured data more accurate. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of the displacement test fixture of the utility model;
[0020] Figure 2 It is a schematic diagram of the structure of the test board of the utility model;
[0021] Figure 3 This utility model Figure 2 A magnified view of part A;
[0022] Figure 4 This utility model Figure 2 A magnified view of part B;
[0023] Figure 5 It is a structural schematic diagram of the connecting strip of the utility model;
[0024] Figure 6 It is a structural schematic diagram of the first clamping strip of the utility model;
[0025] Figure 7 It is a structural schematic diagram of the base of the utility model;
[0026] Figure 8 It is a structural schematic diagram of the second clamping strip of the utility model;
[0027] Fig. 9 It is a structural schematic diagram of the displacement testing device of the utility model without connecting the battery cell.
[0028] Icon: 1-test board; 11-first connecting hole group; 111-first connecting hole; 112-second connecting hole; 12-second connecting hole group; 121-fifth connecting hole; 122-sixth connecting hole; 13-test hole; 2-first clamping piece; 21-connecting plate; 211-horizontal plate; 212-vertical plate; 213-first limiting block; 214-third connecting hole; 22-accommodating groove; 23-first clamping strip; 231-fourth connecting hole; 24-first clamping part; 3-second clamping piece; 31-base; 311-bottom plate; 312-side plate; 313-seventh connecting hole; 32-second limiting block; 33-second clamping strip; 331-eighth connecting hole; 34-second clamping part; 4-battery cell; 5-test pen. DETAILED DESCRIPTION
[0029] The utility model is described in detail below in conjunction with the accompanying drawings.
[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0031] Example 1
[0032] like Figure 1 A battery cell expansion displacement testing device shown includes a battery cell 4 to be tested, and the testing device includes two test plates 1 arranged opposite to each other, and a clamping device is provided between the two test plates 1, through which the battery cell 4 is clamped, and each test plate 1 is provided with a plurality of test holes 13, and the axis of each test hole 13 is perpendicular to the tested surface of the battery cell 4. The staff puts the test pen 5 into the test hole 13. Since the axis of the test hole 13 is perpendicular to the tested surface of the battery cell 4, the test pen 5 is also perpendicular to the tested surface of the battery cell 4 during the test, so that the test data is more accurate, and the test plate 1 is provided with a plurality of test holes 13, so that the test personnel can use the test pen 5 to pass through the test hole 13 during the test, so that the battery cell 4 can be measured at multiple points, so that the measured data is more comprehensive.
[0033] As mentioned above, the test board 1 is provided with a first connection hole group 11, and is connected to a clamping device through the first connection hole group 11, the clamping device includes a first clamping member 2, and the first clamping member 2 corresponds to the first connection hole group 11;
[0034] Furthermore, the test board 1 is provided with a second connection hole group 12, and the second connection hole group 12 and the first connection hole group 11 are connected to the clamping device, and the clamping device also includes a second clamping member 3. This configuration enables the test board 1 to be connected and fixed by the cooperation between the first clamping member 2 and the first connection hole group 11 and the cooperation between the second clamping member 3 and the second connection hole group 12. Figure 1-4 shown.
[0035] As mentioned above, the first clamping member 2 includes a pair of connecting plates 21, each connecting plate 21 is composed of a horizontal plate 211 and a vertical plate 212, and a first limit block 213 is also provided on the connecting plate 21, one end face of the first limit block 213 is connected to the horizontal plate 211, and the other end face is connected to the vertical plate 212, so as to ensure the stability of the battery cell 4;
[0036] Further, the horizontal plate 211 and the vertical plate 212 are spliced to form a receiving groove 22, and the first clamping member 2 includes a pair of first clamping strips 23, each of which is connected to the test board 1 through the first connection hole group 11, and one end of the first clamping strip 23 is connected to the test board 1, and the other end forms a first clamping portion 24 with the first limit block 213, so that the battery cell 4 can be stably clamped by the cooperation of the first clamping strip 23 and the first limit block 213;
[0037] Further, the first connection hole group 11 includes a first connection hole 111, and a third connection hole 214 is provided at both ends of the connection plate 21, and the third connection hole 214 is adapted to the first connection hole 111. This arrangement makes the connection between the test board 1 and the clamping device more stable. The first connection hole group 11 includes a second connection hole 112, and a fourth connection hole 231 is provided at one end of the first clamping strip 23, and the fourth connection hole 231 is adapted to the second connection hole 112. This arrangement makes the connection between the test board 1 and the clamping device more stable, as shown in FIG. Figure 1-6 and Fig. 9 As shown;
[0038] By such a clamping method, when the measured battery cell 4 is clamped and fixed, the first clamping member 2 is only clamped at the corners of the battery cell 4, so that the expansion of the battery cell 4 can be more restored, making the subsequent measurement results more accurate.
[0039] As mentioned above, the second clamping member 3 includes a base 31, the base 31 includes a bottom plate 311, a pair of side plates 312 are symmetrically provided on the upper end of the bottom plate 311, a second limit block 32 is provided on one side of the side plate 312, one side of the second limit block 32 is connected to the side plate 312, and the other side is connected to the bottom plate 311, and the base 31 is connected to the test board 1 through the second connection hole group 12, so that the battery cell 4 is limited to prevent the battery cell 4 from sliding after being clamped;
[0040] Furthermore, the second clamping member 3 includes a pair of second clamping strips 33, one end of the second clamping strip 33 is connected to the test board 1 through the second connection hole group 12, and the other end of the second clamping strip 33 and the second limit block 32 form a second clamping portion 34. In this way, the second clamping strip 33 and the second limit block 32 are arranged to achieve stable clamping of the battery cell 4.
[0041] As mentioned above, the second connection hole group 12 includes the fifth connection hole 121, and the end surfaces of both ends of the base 31 are provided with seventh connection holes 313, and the seventh connection holes 313 are adapted to the fifth connection holes 121, so that the connection between the test board 1 and the clamping device is more stable;
[0042] Further, the second connection hole group 12 includes a sixth connection hole 122, and an eighth connection hole 331 is provided at one end of the second clamping strip 33, and the eighth connection hole 331 is adapted to the sixth connection hole 122. This arrangement makes the connection between the test board 1 and the clamping device more stable. Figure 7-9 As shown;
[0043] In this way, when the battery cell 4 is clamped, the expanded position of the battery cell 4 can be avoided, and the expansion surface of the battery cell 4 is prevented from being clamped, so that the subsequent measurement results are more accurate.
[0044] Embodiment 2:
[0045] This embodiment 2 improves the first clamping member 2 of embodiment 1:
[0046] In Example 1, a connecting hole is opened on the side of the first clamping strip 23 of the first clamping member 2, and the surface where the connecting hole is located is perpendicular to the surface where the fourth connecting hole 231 is located; and a matching hole corresponding to the position and size of the connecting hole is opened on the connecting plate 21, and the first clamping member 2 can be connected more firmly through the matching hole and the connecting hole.
[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A battery cell expansion displacement testing device, comprising a battery cell (4), characterized in that: The device comprises two test plates (1), each of the test surfaces of the battery cell (4) being tested being provided with one of the test plates (1), the test plates (1) being provided with a plurality of test holes (13), the test holes (13) being used to place test pens (5), the axial direction of the test holes (13) being perpendicular to the test surface of the battery cell (4), the size of the test pens (5) being adapted to the size of the test holes (13), and a clamping device being provided between the two test plates (1), through which the battery cell (4) is clamped.
2. A battery cell expansion displacement testing device according to claim 1, characterized in that: The test board (1) is provided with a first connection hole group (11), the clamping device comprises a first clamping member (2), the first clamping member (2) is connected to the test board (1) via the first connection hole group (11), the test board (1) is provided with a second connection hole group (12), the clamping device comprises a second clamping member (3), the second clamping member (3) is connected to the test board (1) via the second connection hole group (12).
3. A battery cell expansion displacement testing device according to claim 2, characterized in that: The first clamping member (2) comprises a pair of connecting plates (21), wherein the connecting plate (21) comprises a transverse plate (211), wherein the lower end of the transverse plate (211) is connected to a vertical plate (212), and a first limiting block (213) is provided on the connecting plate (21), wherein one side of the first limiting block (213) is connected to a side wall of the vertical plate (212), and one side of the first limiting block (213) is connected to the bottom of the transverse plate (211).
4. A battery cell expansion displacement testing device according to claim 3, characterized in that: The horizontal plate (211) and the vertical plate (212) are spliced to form a receiving groove (22); the first clamping member (2) comprises a pair of first clamping strips (23); each of the first clamping strips (23) is connected to the test board (1) via the first connection hole group (11); one end of the first clamping strip (23) is connected to the test board (1), and the other end forms a first clamping portion (24) with the first limit block (213).
5. A battery cell expansion displacement testing device according to claim 4, characterized in that: The first connection hole group (11) comprises a first connection hole (111), and third connection holes (214) are provided at both ends of the connection plate (21), and the third connection holes (214) are adapted to the first connection holes (111).
6. A battery cell expansion displacement testing device according to claim 4, characterized in that: The first connection hole group (11) comprises a second connection hole (112), and a fourth connection hole (231) is provided at one end of the first clamping strip (23), and the fourth connection hole (231) is adapted to fit the second connection hole (112).
7. A battery cell expansion displacement testing device according to any one of claims 2 to 6, characterized in that: The second clamping member (3) comprises a base (31), the base (31) comprises a bottom plate (311), a pair of side plates (312) are symmetrically arranged at the upper end of the bottom plate (311), a second limit block (32) is arranged on one side of the side plate (312), one side of the second limit block (32) is connected to the side plate (312), and the other side is connected to the bottom plate (311), and the base (31) is connected to the test plate (1) via the second connection hole group (12).
8. A battery cell expansion displacement testing device according to claim 7, characterized in that: The second clamping member (3) comprises a pair of second clamping strips (33), one end of the second clamping strip (33) is connected to the test board (1) via the second connection hole group (12), and the other end of the second clamping strip (33) and the second limit block (32) form a second clamping portion (34).
9. A battery cell expansion displacement testing device according to claim 8, characterized in that: The second connection hole group (12) comprises a fifth connection hole (121), and the end surfaces at both ends of the base (31) are provided with a seventh connection hole (313), and the seventh connection hole (313) is adapted to the fifth connection hole (121).
10. The battery cell expansion displacement testing device according to claim 8, characterized in that: The second connection hole group (12) comprises a sixth connection hole (122), and one end of the second clamping strip (33) is provided with an eighth connection hole (331), and the eighth connection hole (331) is adapted to match the sixth connection hole (122).