A lithium ion battery test fixture

Abstract

The utility model provides a kind of lithium ion battery test fixed clamp, lithium ion battery test fixed clamp includes frame body, and the inside wall of frame body is fixed with cross, and the top of cross is equipped with clamping assembly, and clamping assembly reciprocating telescopic setting is at four end points of cross, and the center of the bottom of cross is rotatably provided with pulley assembly, and pulley assembly is fixedly connected with clamping assembly between through pull rope component, and the bottom of pulley assembly is equipped with the limiting component for adjusting the tension of clamping assembly, and the top of clamping assembly is rotatably provided with the receiving piece for switching clamping mode, the utility model provides a kind of lithium ion battery test fixed clamp, by setting up the receiving piece for switching clamping mode, to some extent, reduce the physical damage probability of lithium ion battery in testing process, prolong the service life of lithium ion battery, solve the inconvenience brought by existing fixed clamping mode.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery manufacturing technology, and in particular to a lithium-ion battery testing fixture. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage systems and consumer electronics, the demand for performance testing of lithium-ion batteries is increasing.

[0003] Current lithium-ion battery testing fixtures have the following defects: Traditional clamps typically employ a fixed structure design, supporting only a single clamping mode, such as clamping only the side or bottom of the battery. For example, a box-type clamp uses a rigid pressure plate to secure the battery side, but it cannot switch to a bottom-supporting mode, causing the battery to easily slip off during vibration testing. A tray-type clamp, on the other hand, can only support the bottom of the battery and cannot meet the connection requirements of the side charging and discharging interfaces. The problems caused by the inability to switch clamping modes are as follows: On the one hand, traditional clamps directly contact the outer wall of the battery. During overcharge, over-discharge, or nail penetration tests, the battery may experience localized overheating due to internal short circuits, which could easily lead to an explosion. Furthermore, the contact between the metal clamps and the battery casing, especially the aluminum casing, can cause short circuits. On the other hand, directly clamping the outer wall of the battery can, to some extent, cause casing deformation or tab breakage due to excessive clamping force, resulting in inconvenience in actual use.

[0004] Therefore, it is necessary to provide a new lithium-ion battery testing fixture to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a lithium-ion battery testing fixture.

[0006] The lithium-ion battery testing fixture provided by this utility model includes: a frame, a cross fixed on the inner side wall of the frame, a clamping assembly on the top of the cross, the clamping assembly being reciprocated and extended at the four ends of the cross, a pulley assembly being rotatably arranged at the center of the bottom of the cross, the pulley assembly being fixedly connected to the clamping assembly by a pull rope assembly, a limiting assembly for adjusting the tension of the clamping assembly being provided at the bottom of the pulley assembly, and a receiving member for switching the clamping mode being rotatably arranged at the top of the clamping assembly.

[0007] Preferably, the top of the cross is provided with a cross-shaped groove, the bottom of the clamping assembly slides in the groove, a limiting groove is provided on the inner side wall of the groove, and the clamping assembly slides on the inner side wall of the limiting groove. The clamping assembly includes four sliding plates, the bottoms of which slide within the grooves, and limit blocks fixed at both ends of each of the four sliding plates. The four sliding plates slide on the inner sidewall of the limit grooves via the limit blocks. A groove is formed at the top of each of the four sliding plates. There are four receiving members, one end of which rotates on the bottom wall of each of the four grooves.

[0008] Preferably, a soft rubber pad is fixed on the inner wall of the tank, and each of the four receiving components includes a rotating shaft and a receiving plate. The receiving plate is fixed on the surface of the rotating shaft, and the four receiving plates rotate on the bottom wall of the four tanks respectively through the four rotating shafts. A rubber pad I is fixed on the side of each of the four receiving plates near the soft rubber pad, and a rubber pad II for edge protection of the lithium-ion battery is fixed on the side of each of the four receiving plates away from the soft rubber pad.

[0009] Preferably, a base is fixed at the center of the bottom of the cross, and a mounting groove is provided on the top of the base. A rotating rod is rotatably provided on the bottom wall of the mounting groove. One end of the rotating rod passes through the bottom of the base and is fixed with a knob. A through hole is provided on the top of the knob. Mounting plate one and mounting plate two are fixed to the other end of the rotating rod. Mounting plate one is located between the bottom wall of the mounting groove and mounting plate two. A torsion spring is sleeved on the surface of the rotating rod. The two ends of the torsion spring are fixedly connected to the bottom wall of the mounting groove and one side of mounting plate one, respectively. The rope assembly is wound between mounting plate one and mounting plate two.

[0010] Preferably, the rope assembly includes a pull rope one and four pull ropes two. The pull rope one is located between the mounting plate one and the mounting plate two. The pull rope one is wound around the surface of the rotating rod, and the two ends of the four pull ropes two are respectively fixedly connected to the four sliding plates and the surface of the pull rope one.

[0011] Preferably, the bottom ring of the base is provided with a plurality of equidistant positioning holes, the diameter of the plurality of positioning holes being larger than the diameter of the through hole, each limiting component including a rod, one end of the rod passing through the surface of the through hole and extending into the positioning hole, both ends of the rod being fixed with limiting plates, the knob being located between two limiting plates, and the outer diameter of the limiting plate matching the diameter of the positioning hole.

[0012] Preferably, the bottom of the frame is also fixed with multiple support rods.

[0013] Compared with related technologies, the lithium-ion battery testing fixture provided by this utility model has the following advantages: 1. Traditional clamps directly contact the outer wall of lithium-ion batteries. During overcharge, over-discharge, or nail penetration tests, the metal clamps and the conductive parts of the lithium-ion batteries will form a micro-short circuit, leading to local overheating or even thermal runaway. The clamping components of this device avoid direct contact with the conductive parts of the battery body by clamping the four corners of the lithium-ion battery, thus physically blocking the short circuit path and improving the safety of the testing process to a certain extent. 2. By setting up a receiving part for switching clamping methods, this device minimizes the contact between the lithium-ion battery body and the clamping component when clamping the edge of the lithium-ion battery. This avoids damage to the clamp due to high temperature and avoids direct pressure on the cells or tabs in the lithium-ion battery body. To a certain extent, this reduces the probability of physical damage to the lithium-ion battery during the testing process, extends the service life of the lithium-ion battery, and solves the inconvenience caused by the existing fixed clamping method. 3. Traditional clamps only support a single clamping mode and cannot adapt to the testing needs of multiple scenarios. This utility model sets up a receiving part for switching clamping modes. On the one hand, the clamping component retracts to the end of the cross and fixes the side of the lithium-ion battery to adapt to the charging and discharging interface connection test. At the same time, the bottom of the receiving part supports the bottom edge of the lithium-ion battery. On the other hand, the clamping angle can be adjusted by rotating the receiving part so that one side of the receiving part clamps the four corners of the lithium-ion battery to adapt to the needle penetration test. The operation is simple and quick, which significantly improves the versatility of the equipment. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of the lithium-ion battery testing fixture provided by this utility model; Figure 2 This is a schematic diagram of the clamping assembly. Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the limit component structure; Figure 5 This is a schematic diagram of a torsion spring structure.

[0015] The diagram is labeled as follows: 1. Frame; 11. Cross; 12. Slide groove; 121. Limiting groove; 2. Support rod; 3. Base; 31. Rotating rod; 311. Positioning hole; 312. Mounting groove; 32. Knob; 321. Through hole; 322. Insert rod; 323. Limiting plate; 33. Mounting plate one; 34. Torsion spring; 35. Pull rope one; 351. Mounting plate two; 4. Pull rope two; 5. Slide plate; 51. Limiting block; 52. Groove; 521. Soft rubber pad; 522. Rotating shaft; 53. Receiving plate; 531. Rubber pad one; 54. Rubber pad two. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Please refer to the following: Figures 1 to 5 ,in, Figure 1 A schematic diagram of the overall structure of the lithium-ion battery testing fixture provided by this utility model; Figure 2 This is a schematic diagram of the clamping assembly. Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the limit component structure; Figure 5 This is a schematic diagram of a torsion spring structure.

[0018] In some embodiments, such as Figures 1 to 5 As shown, the device includes a frame 1, a cross 11 fixed on the inner side wall of the frame 1, a clamping assembly on the top of the cross 11, the clamping assembly being reciprocated and extended at the four ends of the cross 11, a pulley assembly being rotatably arranged at the center of the bottom of the cross 11, the pulley assembly being fixedly connected to the clamping assembly by a pull rope assembly, a limiting assembly for adjusting the tension of the clamping assembly being provided at the bottom of the pulley assembly, and a receiving part for switching the clamping mode being rotatably arranged on the top of the clamping assembly.

[0019] Specifically, traditional clamps directly contact the outer wall of lithium-ion batteries. During overcharge, over-discharge, or nail penetration tests, the metal clamps and the conductive parts of the lithium-ion batteries can form micro-short circuits, leading to local overheating or even thermal runaway. The clamping components of this device avoid direct contact with the conductive parts of the battery body by clamping the four corners of the lithium-ion battery, thus physically blocking the short circuit path and improving the safety of the testing process to a certain extent. Furthermore, by setting up a receiving component for switching clamping methods, this device minimizes the contact between the lithium-ion battery body and the clamping assembly when clamping the edge of the lithium-ion battery. This avoids damage to the clamp due to high temperatures and avoids direct pressure on the cells or tabs in the lithium-ion battery body. To a certain extent, this reduces the probability of physical damage to the lithium-ion battery during testing, extends the service life of the lithium-ion battery, and solves the inconvenience caused by existing fixed clamping methods. Furthermore, traditional clamps only support a single clamping mode and cannot adapt to the testing needs of multiple scenarios. This device, by setting up a receiving component for switching clamping modes, allows the clamping component to retract to the end of the cross, fixing the side of the lithium-ion battery to adapt to charging and discharging interface connection testing. At the same time, the bottom of the receiving component supports the bottom edge of the lithium-ion battery. On the other hand, by rotating the receiving component to adjust the clamping angle, one side of the receiving component clamps the four corners of the lithium-ion battery, adapting to needle penetration testing. The operation is simple and quick, significantly improving the versatility of the device.

[0020] In some embodiments, reference is made to Figures 1 to 5 As shown, the top of the cross 11 is provided with a cross-shaped groove 12, the bottom of the clamping assembly slides in the groove 12, and a limiting groove 121 is provided on the inner side wall of the groove 12, and the clamping assembly slides on the inner side wall of the limiting groove 121. The clamping assembly includes four sliding plates 5, the bottom of each of the four sliding plates 5 slides within a sliding groove 12, and each of the two ends of each of the four sliding plates 5 is fixed with a limiting block 51. The four sliding plates 5 slide on the inner side wall of the limiting groove 121 via the limiting block 51. The top of each of the four sliding plates 5 is provided with a groove 52. There are four receiving parts, and one end of each of the four receiving parts rotates on the bottom wall of the four grooves 52 respectively. A soft rubber pad 521 is fixed on the inner wall of the tank 52. Each of the four receiving components includes a rotating shaft 522 and a receiving plate 53. The receiving plate 53 is fixed on the surface of the rotating shaft 522. The four receiving plates 53 rotate on the bottom wall of the four tanks 52 respectively through the four rotating shafts 522. A rubber pad 531 is fixed on the side of each of the four receiving plates 53 near the soft rubber pad 521. A rubber pad 54 for edge protection of the lithium-ion battery is fixed on the side of each of the four receiving plates 53 away from the soft rubber pad 521, so as to realize the switching between edge clamping and side clamping and lifting modes. A base 3 is fixed at the center of the bottom of the cross 11. A mounting groove 312 is opened on the top of the base 3. A rotating rod 31 is rotatably installed on the bottom wall of the mounting groove 312. One end of the rotating rod 31 passes through the bottom of the base 3 and is fixed with a knob 32. A through hole 321 is opened on the top of the knob 32. A mounting plate 1 33 and a mounting plate 2 351 are fixed to the other end of the rotating rod 31. The mounting plate 1 33 is located between the bottom wall of the mounting groove 312 and the mounting plate 2 351. A torsion spring 34 is sleeved on the surface of the rotating rod 31. The two ends of the torsion spring 34 are fixedly connected to the bottom wall of the mounting groove 312 and one side of the mounting plate 1 33, respectively. A rope assembly is wound between the mounting plate 1 33 and the mounting plate 2 351. The rope assembly includes a pull rope 35 and four pull ropes 4. The pull rope 35 is located between the mounting plate 33 and the mounting plate 351. The pull rope 35 is wound around the surface of the rotating rod 31, and the two ends of the four pull ropes 4 are respectively fixedly connected to the surface of the pull rope 35 and the four slide plates 5. The bottom ring of the base 3 is provided with multiple equidistant positioning holes 311. The diameter of the multiple positioning holes 311 is larger than the diameter of the through hole 321. The limiting components all include insert rods 322. One end of each insert rod 322 passes through the surface of the through hole 321 and extends into the positioning hole 311. Both ends of the insert rod 322 are fixed with limiting plates 323. The knob 32 is located between the two limiting plates 323, and the outer diameter of the limiting plate 323 matches the diameter of the positioning hole 311. The bottom of the frame 1 is also fixed with multiple support rods 2 to support the entire device.

[0021] When clamped, the lithium-ion battery is placed at the top center of the frame 1; Soft rubber pad 521, rubber pad one 531 and rubber pad two 54 are all used to protect the surface of lithium-ion batteries. The pull rope 35 and the pull rope 4 are preferably steel wire ropes. One function of the torsion spring 34 is to wind up the pull rope 4. Specifically, during use, the hand-held knob 32 is rotated, which drives the rotating rod 31 to rotate. The torsion spring 34 stores energy, and the pull rope 1 35 tightens or releases. The pull rope 1, through the pull rope 2 4, pulls the four slide plates 5 to slide synchronously along the slide groove 12, realizing the retraction or expansion of the clamping component. When adjusted to the desired position, the hand-held limiting plate 323 drives the insertion rod 322 to slide within the through hole 321. The limiting plate 323 at the bottom of the insertion rod 322 inserts into the positioning hole 311, locking the knob 32 to the desired position and keeping the slide plate 5 stable. When it is necessary to switch the mode of the receiving component, the hand-held receiving plate 53 is held on one side, and through the rotating shaft 522, the receiving plate 53 rotates within the groove 52, switching the contact between the rubber pad 1 531 or the rubber pad 2 54 and the lithium-ion battery. During switching: Side fixing + bottom support: Rotate the receiving plate 53 so that the rubber pad 2 54 faces down, and the rubber pad 1 531 and the soft rubber pad 521 support the bottom and side of the battery respectively; Four-corner clamping: The receiving plate 53 rotates until the rubber pad 531 contacts the four corners of the battery, suitable for needle penetration testing.

[0022] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0023] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A lithium-ion battery testing fixture, comprising a frame (1), characterized in that, A cross (11) is fixed on the inner side wall of the frame (1). A clamping assembly is provided on the top of the cross (11). The clamping assembly is reciprocatingly extended and retracted at the four ends of the cross (11). A pulley assembly is rotatably provided at the center of the bottom of the cross (11). The pulley assembly and the clamping assembly are fixedly connected by a pull rope assembly. A limiting assembly for adjusting the tension of the clamping assembly is provided at the bottom of the pulley assembly. A receiving part for switching the clamping mode is rotatably provided on the top of the clamping assembly.

2. The lithium-ion battery testing fixture according to claim 1, characterized in that, The top of the cross (11) is provided with a cross-shaped groove (12), the bottom of the clamping assembly slides in the groove (12), and a limiting groove (121) is provided on the inner side wall of the groove (12), and the clamping assembly slides on the inner side wall of the limiting groove (121). The clamping assembly includes four sliding plates (5), the bottoms of the four sliding plates (5) slide within the sliding groove (12), and the two ends of the four sliding plates (5) are fixed with limit blocks (51). The four sliding plates (5) slide on the inner sidewall of the limit groove (121) through the limit blocks (51). The top of the four sliding plates (5) is provided with a groove (52). There are four receiving parts, and one end of each of the four receiving parts rotates on the bottom wall of the four grooves (52).

3. The lithium-ion battery testing fixture according to claim 2, characterized in that, A soft rubber pad (521) is fixed on the inner wall of the tank (52). Each of the four receiving parts includes a rotating shaft (522) and a receiving plate (53). The receiving plate (53) is fixed on the surface of the rotating shaft (522). The four receiving plates (53) rotate on the bottom wall of the four tanks (52) respectively through the four rotating shafts (522). A rubber pad one (531) is fixed on the side of the four receiving plates (53) close to the soft rubber pad (521). A rubber pad two (54) for edge protection of lithium-ion batteries is fixed on the side of the four receiving plates (53) away from the soft rubber pad (521).

4. The lithium-ion battery testing fixture according to claim 3, characterized in that, A base (3) is fixed at the center of the bottom of the cross (11). A mounting groove (312) is provided on the top of the base (3). A rotating rod (31) is rotatably provided on the bottom wall of the mounting groove (312). One end of the rotating rod (31) passes through the bottom of the base (3) and is fixed with a knob (32). A through hole (321) is provided on the top of the knob (32). The other end of the rotating rod (31) is fixed with a mounting plate one (33) and a mounting plate two (351). The mounting plate one (33) is located between the bottom wall of the mounting groove (312) and the mounting plate two (351). A torsion spring (34) is sleeved on the surface of the rotating rod (31). The two ends of the torsion spring (34) are fixedly connected to the bottom wall of the mounting groove (312) and one side of the mounting plate one (33), respectively. A rope assembly is wound between the mounting plate one (33) and the mounting plate two (351).

5. The lithium-ion battery testing fixture according to claim 4, characterized in that, The rope assembly includes a pull rope one (35) and four pull ropes two (4). The pull rope one (35) is located between the mounting plate one (33) and the mounting plate two (351). The pull rope one (35) is wound around the surface of the rotating rod (31), and the two ends of the four pull ropes two (4) are respectively fixedly connected to the surfaces of the four sliding plates (5) and the pull rope one (35).

6. The lithium-ion battery testing fixture according to claim 5, characterized in that, The bottom of the base (3) is provided with a plurality of equidistantly distributed positioning holes (311). The diameter of the plurality of positioning holes (311) is larger than the diameter of the through hole (321). Each limiting component includes a rod (322). One end of the rod (322) passes through the surface of the through hole (321) and extends into the positioning hole (311). Both ends of the rod (322) are fixed with limiting plates (323). The knob (32) is located between two limiting plates (323), and the outer diameter of the limiting plate (323) matches the diameter of the positioning hole (311).

7. The lithium-ion battery testing fixture according to claim 6, characterized in that, The bottom of the frame (1) is also fixed with multiple support rods (2).

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