A general-purpose jig for a cuboid battery cell

Abstract

The application relates to a universal clamp for cuboid battery cells, which comprises a bottom plate, a top plate opposite to and parallel to the bottom plate, four clamping plates movably connected to the bottom plate, two adjusting rods hinged to the side opposite to each other of the clamping plates, a cooperation mechanism arranged on the bottom plate and connecting the two clamping plates opposite to each other, and the cooperation mechanism drives the two clamping plates opposite to each other to be central symmetrical. The battery cell is placed on the bottom plate, the operator adjusts the angle of the clamping plate through the adjusting rod so that the clamping plate is parallel to the side of the battery cell, when the operator controls one side of the clamping plate, the other clamping plate synchronously adjusts its position through the cooperation mechanism, and the operator pushes the clamping plate to the battery cell to clamp and fix the four sides of the battery cell. The clamping plate can freely move on the bottom plate, so that the clamping plate can clamp battery cells with different sizes, and the application range is wide.

Description

Technical Field

[0001] This application relates to the technical field of battery cell testing, and in particular to a universal fixture for cuboid battery cells. Background Technology

[0002] After the formation and capacity testing of lithium-ion batteries, the individual cells need to undergo electrical performance cycle testing and safety performance testing. In the existing technology, the test fixtures for prismatic cells are mostly fixed-model dedicated fixtures. If the model of the test cell is changed, the test fixture needs to be changed.

[0003] Related technology can be found in Chinese Patent Publication No. CN222232508U, which discloses a single cell testing fixture and a battery pack testing device, including: a fixing component, multiple foams, and multiple securing components. The fixing component includes a first fixing plate and a second fixing plate, which are spaced apart along a first direction; the multiple foams are respectively located on the side of the first fixing plate facing the second fixing plate and the side of the second fixing plate facing the first fixing plate.

[0004] Existing technologies, such as the aforementioned clamps, typically clamp the sides of square battery cells for testing due to their large surface area. However, this method limits the types of cells that can be tested and makes it difficult to measure the degree of cell expansion. Furthermore, clamps for holding the sides of square battery cells are often fixed-model, dedicated clamps with limited applicability. Therefore, existing clamps are insufficient to meet the diverse testing needs of various battery cell specifications. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a universal clamp for cuboid battery cells.

[0006] The general-purpose clamp for cuboid battery cells provided in this application adopts the following technical solution: A universal clamp for cuboid battery cells includes a base plate with a top plate that is directly opposite and parallel to the base plate. Four clamping plates are movably connected to the base plate, with each pair of clamping plates facing each other. Two adjusting rods are hinged to the opposite sides of each clamping plate, and the two adjusting rods intersect on both sides of the clamping plates. A coordinating mechanism is provided on the base plate, and the clamping plates facing each other are connected through the coordinating mechanism. The coordinating mechanism drives the opposing clamping plates to be centrally symmetrical.

[0007] By adopting the above technical solution, the battery cell is placed on the base plate. The operator adjusts the angle of the clamping plate using an adjusting rod to make the clamping plate parallel to the side of the battery cell. When the operator manipulates one clamping plate, the other clamping plate adjusts its position synchronously through a coordinating mechanism. The operator then pushes the clamping plate towards the battery cell to clamp and fix it on all four sides. The clamping plates can move freely on the base plate, thus enabling the clamping of battery cells of different sizes, making it widely applicable.

[0008] Preferably, the base plate has a sliding groove that mates with the clamping plate. The cooperating mechanism includes a sliding rod slidably connected in the sliding groove. The adjusting rod has a strip-shaped adjusting groove. The two ends of the sliding rod pass through the two adjusting grooves and are slidably connected in the sliding groove. A sliding pin passing through the sliding groove is hinged to the center of the sliding rod. A cooperating rod is rotatably connected to the bottom of the base plate. The cooperating rod has a strip-shaped cooperating groove, and two opposing sliding pins pass through the two ends of the cooperating groove.

[0009] By adopting the above technical solution, when the operator slides one side of the clamping plate to change the position of the clamping plate to clamp cells of different sizes, the clamping plate drives the two adjusting rods to slide synchronously. The adjusting rod drives the slide rod to slide in the slide groove. The slide rod drives the cooperating rod to rotate through the sliding pin. The cooperating rod rotates around its own center line. The other end of the cooperating rod drives the slide rod to slide through the sliding pin, thereby changing the position of the other side of the clamping plate. Thus, the two opposing clamping plates change position synchronously, and the two clamping plates are always symmetrical around the center, which is convenient to use.

[0010] Preferably, a locking pin is vertically threaded onto the upper surface of the base plate. The locking pin passes through the adjustment groove and is threadedly connected to the base plate. The upper end of the locking pin is located above the adjustment rod and its diameter is greater than the width of the adjustment groove.

[0011] By adopting the above technical solution, the operator loosens the locking pin, allowing it to slide freely within the adjustment groove. The operator can then rotate the adjusting rod to adjust the angle of the clamping plate. After adjustment, the operator tightens the locking pin, which presses the adjusting rod into place, thus fixing the angle of the clamping plate.

[0012] Preferably, there are two coordinating rods, and the middle position of both coordinating rods is rotatably connected to the center of the base plate.

[0013] By adopting the above technical solution, two coordinating rods can control two pairs of clamps separately, which is convenient to use.

[0014] Preferably, a clamping frame is vertically slidably connected to the top plate.

[0015] By adopting the above technical solution, the clamping frame presses the top surface of the battery cell, thereby improving the cell's fixation effect.

[0016] Preferably, the clamping frame includes two clamping rods that are rotatably connected to the top plate. Each clamping rod has a strip-shaped clamping groove. One clamping rod is opposite to a pair of clamping plates. A clamping screw is threaded through the center of the upper surface of the clamping plates. The upper end of the clamping screw passes through the clamping groove and is threaded with a clamping nut.

[0017] By adopting the above technical solution, the clamping rod can press down on the upper surface of the battery cell, while the clamping screw on the clamping plate can slide in the clamping groove. The clamping rod limits the clamping plate, so that the two clamping plates are always aligned, further improving the clamping effect of the clamping plates.

[0018] Preferably, the upper surface of the clamping plate is provided with a relief groove at the center to avoid the clamping rod.

[0019] By adopting the above technical solution, when the clamping rod rotates, the clearance groove provides rotation space for the clamping rod to rotate.

[0020] Preferably, the top plate is vertically threaded with a lifting nut at its center, and a rotating pin is rotatably connected to the lower end of the lifting nut. The center of the clamping rod is fixedly connected to the rotating pin.

[0021] By adopting the above technical solution, the operator can rotate the lifting nut, which in turn drives the clamping rod to move up and down through the rotating pin, making it easy to operate.

[0022] In summary, this application includes the following beneficial technical effects: This application can adjust the clamping position of the clamping plate, thereby enabling the clamping of battery cells of different sizes, and has a wide range of applications. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the embodiment; Figure 2 This is a schematic diagram of the structure for clamping a smaller battery cell in an embodiment; Figure 3 This is a schematic diagram of the structure for clamping a larger battery cell in an embodiment.

[0024] Explanation of reference numerals in the attached figures: 1. Base plate; 11. Slide groove; 12. Locking pin; 2. Top plate; 3. Clamping plate; 31. Clearance groove; 4. Adjusting rod; 41. Adjusting groove; 51. Slide rod; 52. Sliding pin; 53. Coordinating rod; 531. Coordinating groove; 6. Pressing frame; 61. Pressing rod; 611. Pressing groove; 62. Pressing screw; 63. Pressing nut; 64. Lifting nut. Detailed Implementation

[0025] The present application will be further described in detail below with reference to all the accompanying drawings.

[0026] Example

[0027] This application discloses a universal clamp for cuboid battery cells, referring to... Figures 1 to 3 It mainly includes a horizontally arranged base plate 1, and a top plate 2 arranged parallel above the base plate 1. The top plate 2 and the base plate 1 form a space for placing and clamping the battery cells.

[0028] Reference Figures 1 to 3 Four clamping plates 3 are movably mounted on the base plate 1. The four clamping plates 3 are arranged in a rectangular shape and are set in pairs facing each other, corresponding to the four sides of the cuboid battery cell. Two adjusting rods 4 are hinged to the side of each clamping plate 3 opposite to the battery cell clamping surface. The two adjusting rods 4 are symmetrically hinged to the left and right sides of the clamping plate 3.

[0029] Reference Figures 1 to 3 The base plate 1 is equipped with a coordination mechanism. Each pair of opposite clamping plates 3 are linked and driven by the coordination mechanism. The coordination mechanism can drive the two pairs of opposite clamping plates 3 to always maintain a centrally symmetrical displacement state.

[0030] Reference Figures 1 to 3 In actual use, the rectangular battery cell to be clamped is first placed stably in the center of the base plate 1. The operator rotates the adjusting rod 4, and uses the hinge structure between the adjusting rod 4 and the clamping plate 3 to fine-tune the deflection angle of the clamping plate 3, so that the inner clamping surface of the clamping plate 3 is completely parallel and aligned with the outer wall of the battery cell. When any clamping plate 3 is pushed on one side for position adjustment, the clamping plate 3 is linked to the coordinating mechanism through the adjusting rod 4. The coordinating mechanism synchronously drives the clamping plate 3 on the other side to complete the same direction and equidistant displacement, ensuring that the clamping plates 3 on both sides are always symmetrically brought together. Finally, all four clamping plates 3 synchronously clamp the outer wall of the battery cell from all four sides. Because the clamping plates 3 can move freely and flexibly on the base plate 1, they can be adapted to clamp and position rectangular battery cells of different lengths and widths, and have strong versatility.

[0031] Reference Figures 1 to 3 The top surface of the base plate 1 has linear grooves 11 corresponding to the four clamping plates 3. The cooperating mechanism includes a slide rod 51 slidably mounted inside the groove 11. The adjusting rod 4 has an elongated adjusting groove 41 along its length. Both ends of the slide rod 51 pass through the adjusting grooves 41 corresponding to the two sets of adjusting rods 4 on the opposing clamping plates 3, and the ends of the slide rod 51 are slidably embedded in the groove 11. A vertically arranged sliding pin 52 is hinged at the midpoint of the slide rod 51, and the lower end of the sliding pin 52 extends vertically out of the groove 11 to the bottom surface of the base plate 1.

[0032] Reference Figures 1 to 3 Two coordinating rods 53 are rotatably mounted on the bottom of the base plate 1. The midpoints of the rotation of the two coordinating rods 53 are hinged to the center of the base plate 1. The two coordinating rods 53 respectively control the front and rear, and left and right sets of opposing clamping plates 3. The two sets of clamping and adjusting structures are independent of each other and do not interfere with each other, making the zoned adjustment and operation simpler and smoother. The coordinating rods 53 have long coordinating grooves 531 along their length. The two sliding pins 52 corresponding to the opposing clamping plates 3 of the same set are inserted at both ends of the coordinating grooves 531.

[0033] Reference Figures 1 to 3When the clamping plate 3 on one side slides along the slide groove 11 to adjust the spacing, the clamping plate 3 drives the adjusting rods 4 on both sides to move synchronously. The adjusting rod 4 drives the sliding rod 51 to slide horizontally along the slide groove 11 by relying on the adjusting groove 41. The sliding rod 51 pulls the cooperating rod 53 to rotate and swing around its own rotation fulcrum through the sliding pin 52. In the rotating state, the cooperating rod 53 pulls the sliding pin 52 on the other side in the opposite direction by relying on the cooperating groove 531 at the other end, and finally realizes the synchronous and same-direction displacement of the clamping plate 3 on the other side, accurately maintaining the central symmetrical arrangement of the two sets of clamping plates 3, and the adjustment synchronization is high.

[0034] Reference Figures 1 to 3 A locking pin 12 is vertically threaded onto the upper surface of the base plate 1. The locking pin 12 vertically passes through the adjusting groove 41 on the adjusting rod 4 and engages with the locking thread on the base plate 1. The outer diameter of the upper end of the locking pin 12 is larger than the width of the adjusting groove 41, which can limit and tighten the adjusting rod 4.

[0035] Reference Figures 1 to 3 When adjusting the angle of clamping plate 3, loosen the locking pin 12 counterclockwise. The locking pin 12 disengages from the pressing limit on the adjusting rod 4, allowing it to slide freely inside the adjusting groove 41. The operator can then freely rotate the adjusting rod 4 to precisely adjust the tilt angle of clamping plate 3 until it fits against the side of the battery cell. After the angle adjustment is complete, tighten the locking pin 12 clockwise. The upper end of the locking pin 12 presses firmly against the surface of the adjusting rod 4, locking the rotation angle of the adjusting rod 4 and thus fixing the clamping posture of clamping plate 3 to prevent it from shifting or loosening during clamping.

[0036] Reference Figures 1 to 3 A clamping frame 6 is vertically slidably mounted on the top plate 2. The clamping frame 6 includes two clamping rods 61. The clamping frame 6 applies downward pressure from the top of the cell to achieve bidirectional positioning of the cell, which greatly improves the overall clamping stability of the cell.

[0037] Reference Figures 1 to 3 A vertical thread runs through the center of the top plate 2, connecting to a lifting nut 64. The bottom of the lifting nut 64 is rotatably connected to a rotating pin. The middle sections of both clamping rods 61 are fixedly connected to the rotating pin. When controlling the top clamping force, the operator rotates the lifting nut 64 forward or backward. The lifting nut 64 moves vertically up and down via threaded transmission, simultaneously driving the bottom rotating pin to move up and down. The rotating pin then pulls the two clamping rods 61 to simultaneously complete the downward pressing or lifting and releasing actions. The clamping force at the top of the battery cell is precisely adjustable, and the overall structure is convenient and labor-saving to operate.

[0038] Reference Figures 1 to 3Each clamping rod 61 is matched with a set of opposing clamping plates 3. A long, narrow clamping groove 611 is formed on the clamping rod 61. A clamping screw 62 is vertically inserted through the center of the top surface of each clamping plate 3. The upper end of the clamping screw 62 extends upward through the clamping groove 611, and a clamping nut 63 is threaded onto the protruding end. When the operator presses down on the clamping rod 61, it presses against the upper surface of the battery cell to achieve top surface compaction. During clamping, if the position of the clamping plate 3 is slightly adjusted, the clamping screw 62 can adaptively slide along the inside of the clamping groove 611. Simultaneously, the cooperation between the clamping rod 61 and the clamping screw 62 limits the movement, ensuring that the two sets of opposing clamping plates 3 remain aligned, effectively preventing misalignment or displacement of the clamping plates 3.

[0039] Reference Figures 1 to 3 A recessed clearance groove 31 is provided at the center of the top surface of the clamping plate 3. The clearance groove 31 corresponds to the flipping trajectory of the clamping rod 61. When the clamping rod 61 flips down, lifts and resets, the clearance groove 31 can provide sufficient rotation clearance space for the clamping rod 61, preventing structural interference and jamming between the clamping rod 61 and the clamping plate 3.

[0040] The implementation principle of a universal clamp for a rectangular battery cell in this application embodiment is as follows: The rectangular battery cell is placed in the center of the base plate 1. First, the angle of the clamping plate 3 is adjusted by adjusting the rod 4 and locked by locking pin 12. Then, the clamping plate 3 is moved to achieve synchronous and symmetrical closing of the four clamping plates 3 with the help of the coordinating mechanism, and the lateral clamping is completed from all sides of the battery cell. Then, the lifting nut 64 is rotated to drive the pressing frame 6 to press down and fix the top of the battery cell. The positioning and clamping of the battery cell is completed in all directions. The overall structure is easy to adjust and the clamping is stable, which can meet the clamping needs of rectangular battery cells of various specifications.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A universal clamp for rectangular battery cells, comprising a base plate (1), characterized in that: The base plate (1) is provided with a top plate (2) that is directly opposite and parallel to the base plate (1). Four clamping plates (3) are movably connected to the base plate (1). The four clamping plates (3) are opposite each other in pairs. Two adjusting rods (4) are hinged to the opposite sides of the clamping plates (3). The two adjusting rods (4) intersect on both sides of the clamping plates (3). The base plate (1) is provided with a coordinating mechanism. The clamping plates (3) opposite each other are connected through the coordinating mechanism. The coordinating mechanism drives the opposite clamping plates (3) to be symmetrical in the center. The base plate (1) is provided with a sliding groove (11) that matches the clamping plates (3) one by one. The coordinating mechanism includes a slide rod (51) slidably connected in the slide groove (11), an adjustment rod (4) having a strip-shaped adjustment groove (41), the two ends of the slide rod (51) passing through the two adjustment grooves (41) respectively and slidably connected in the slide groove (11), a sliding pin (52) passing through the slide groove (11) is hinged to the center of the slide rod (51), and a coordinating rod (53) is rotatably connected to the bottom of the base plate (1), the coordinating rod (53) having a strip-shaped coordinating groove (531) and two opposing sliding pins (52) passing through the two ends of the coordinating groove (531).

2. The universal clamp for a cuboid battery cell according to claim 1, characterized in that: The upper surface of the base plate (1) is vertically threaded with a locking pin (12). The locking pin (12) passes through the adjustment groove (41) and is threadedly connected to the base plate (1). The upper end of the locking pin (12) is located above the adjustment rod (4) and its diameter is greater than the width of the adjustment groove (41).

3. A universal clamp for a cuboid battery cell according to claim 1, characterized in that: The coordinating rod (53) is provided in two parts, and the middle position of the two coordinating rods (53) is rotatably connected to the center of the base plate (1).

4. A universal clamp for a cuboid battery cell according to claim 1, characterized in that: A clamping frame (6) is vertically slidably connected to the top plate (2).

5. A universal clamp for a cuboid battery cell according to claim 4, characterized in that: The clamping frame (6) includes two clamping rods (61) that are rotatably connected to the top plate (2). The clamping rods (61) have strip-shaped clamping grooves (611). One clamping rod (61) is opposite to a pair of clamping plates (3). A clamping screw (62) is threaded through the center of the upper surface of the clamping plate (3). The upper end of the clamping screw (62) passes through the clamping groove (611) and is threaded with a clamping nut (63).

6. A universal clamp for a cuboid battery cell according to claim 5, characterized in that: The upper surface of the clamping plate (3) is provided with a relief groove (31) for avoiding the clamping rod (61).

7. A universal clamp for a cuboid battery cell according to claim 5, characterized in that: The top plate (2) is vertically threaded with a lifting nut (64) at its center. The lower end of the lifting nut (64) is rotatably connected with a rotating pin. The center of the clamping rod (61) is fixedly connected to the rotating pin.

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