A clamping device for battery testing and a battery testing system

Abstract

This utility model discloses a clamping device and battery testing system for battery testing. The clamping device includes a clamp body and a conductive rod. The clamp body includes a pivot shaft, an elastic element, and two clamping arms. The clamping arms are rotatably connected via the pivot shaft to form clamping ends and non-clamping ends. The elastic element is disposed between the two clamping arms so that the clamping ends of the two clamping arms can clamp onto the terminals of the battery under test. The conductive rod is movably disposed on the pivot shaft. The conductive rod can move forward relative to the pivot shaft to press against the test area, or can move backward relative to the pivot shaft to separate from the test area. The clamping device adopts a compact pivot structure, and the clamping arms open and close flexibly, making it suitable for operation in confined spaces. At the same time, its non-destructive connection method avoids damage to the battery caused by traditional probe welding, significantly reducing consumable costs. It is especially suitable for scenarios such as batch testing of power battery packs, and has the advantages of high precision, low cost, and long life.

Description

Technical Field

[0001] This utility model relates to the field of battery cell testing technology, and in particular to a clamping device and battery testing system for battery testing. Background Technology

[0002] During the production and use of prismatic batteries, regular sampling and testing are required. Currently, prismatic battery testing mainly falls into two categories: probe-based testing and traditional bar-on-cell testing. Probe-based testing uses auxiliary equipment such as fixing frames and brackets to fix the batteries and uses probes to contact the batteries for electrical performance testing. While this method can meet testing requirements to some extent, it has some significant drawbacks. First, probe-based testing requires a large space, which is not conducive to testing of compact layouts or in confined spaces, such as applications in small test chambers. Second, due to the need for additional auxiliary equipment, probe-based testing is relatively expensive. Bar-on-cell testing requires welding bars onto the batteries to connect them to the testing equipment. This method places high demands on the welding equipment, including space requirements, parameter adjustments, and timeliness. Furthermore, once the bars are welded onto the cells, they are often difficult to remove, leading to either waste of the cells or the need to spend a lot of time and labor grinding the bars, resulting in high testing costs. This not only increases production costs but also affects production efficiency. Therefore, existing technologies lack testing methods and devices that can balance testing in confined spaces and testing costs. Utility Model Content

[0003] This utility model provides a clamping device and a battery testing system for battery testing, which solves the problem that existing technologies cannot balance testing in confined spaces and testing costs during the testing of square batteries, thereby achieving the effect of facilitating testing and reducing testing costs.

[0004] Specifically, this utility model provides a clamping device for battery testing, including a clamp body and a conductive rod. The clamp body includes a pivot shaft, an elastic element, and two clamping arms. The two clamping arms are rotatably connected through the pivot shaft to form a clamping end and a non-clamping end.

[0005] The elastic element is disposed between the two clamping arms and is used to provide elastic force to the clamping arms so that the clamping ends of the two clamping arms can clamp onto the terminal of the battery to be tested.

[0006] The conductive rod is movably mounted on the pivot shaft and located between the two clamping arms;

[0007] The conductive rod can move forward relative to the pivot axis to press against the test part, or it can move backward relative to the pivot axis to separate from the test part.

[0008] Optionally, the conductive rod is provided with threads; one end of the conductive rod is provided with a first connecting part for connecting to the test part, and the other end is provided with a second connecting part for connecting to the test device;

[0009] The pivot shaft is provided with a threaded hole, and the conductive rod is screwed into the threaded hole.

[0010] Optionally, the first connecting part is a connecting surface for surface contact with the test part; the second connecting part is a connecting ring.

[0011] Optionally, the connecting ring is a circular ring with an inner diameter of 5-10 mm and an outer diameter of 15-20 mm;

[0012] The conductive rod is a cylindrical rod with a threaded section, the outer diameter of which is 5-15mm.

[0013] Optionally, the clamping arm includes a clamping plate and connecting plates disposed on both sides of the clamping plate, the connecting plates having coaxial through holes; the clamping end and the non-clamping end are located on the clamping plate;

[0014] The pivot shaft includes a first shaft segment, a second shaft segment, and a third shaft segment; two second shaft segments are disposed at both ends of the first shaft segment, and two third shaft segments are respectively disposed at the ends of the two second shaft segments away from the first shaft segment; each third shaft segment passes through two through holes.

[0015] Optionally, the two ends of the elastic element are elastically abutted against the non-clamping ends of the two clamping arms, respectively.

[0016] Optionally, the elastic element includes two helical springs, each helical spring including a helical segment and an extension segment connected to both ends of the helical segment, the extension segment extending away from the clamping end; the helical segment is sleeved on the second shaft segment, and each extension segment abuts against the clamping plate.

[0017] Optionally, the clamping end of the clamping arm is provided with multiple fixing protrusions, which are used to clamp the test part.

[0018] Optionally, each of the clamps is provided with a plurality of fixing protrusions spaced apart;

[0019] The fixed protrusion has an arc-shaped contact surface on the side away from the clamping plate; when the two clamping arms are in the preset position, the arc-shaped contact surfaces of the multiple fixed protrusions are on the same circular / elliptical trajectory.

[0020] This utility model also provides a battery testing system, including a testing host and a clamping device as described in any of the above, wherein the test lines of the testing host are detachably connected to the conductive rods of the clamping device.

[0021] The beneficial effects of this utility model are as follows:

[0022] The clamping device and battery testing system provided by this utility model adopt a compact pivot structure, and the clamping arm opens and closes flexibly, making it suitable for operation in confined spaces. Through elastic adaptive clamping, a single person can complete precise operation with one hand, significantly improving testing efficiency. At the same time, its non-destructive connection method avoids damage to the battery caused by traditional probe welding, greatly reducing consumable costs. It is especially suitable for scenarios such as batch testing of power battery packs, and has the advantages of high precision, low cost and long life. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic exploded view of the clamping device in one embodiment of the present invention;

[0025] Figure 2 This is a schematic application scenario diagram of the clamping device in one embodiment of the present utility model;

[0026] Figure 3 This is a schematic application scenario diagram of the clamping device in one embodiment of the present invention.

[0027] In the diagram: 100, clamp body; 101, clamping end; 102, non-clamping end; 110, pivot shaft; 111, first shaft segment; 112, second shaft segment; 113, third shaft segment; 120, elastic element; 121, spiral segment; 122, extension segment; 130, clamping arm; 131, clamping plate; 132, connecting plate; 1321, through hole; 133, fixing protrusion; 200, conductive rod; 201, first connecting part; 202, second connecting part; 300, pole post. Detailed Implementation

[0028] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and 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 of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Figure 1 This is a schematic exploded view of the clamping device in one embodiment of the present invention, as shown below. Figure 1 As shown, and refer to Figures 2 to 3 This utility model provides a clamping device for battery testing, including a clamp body 100 and a conductive rod 200. The clamp body 100 includes a pivot shaft 110, an elastic element 120, and two clamping arms 130. The two clamping arms 130 are rotatably connected through the pivot shaft 110 to form a clamping end 101 and a non-clamping end 102. The elastic element 120 is disposed between the two clamping arms 130 and is used to provide elastic force to the clamping arms 130 so that the clamping ends 101 of the two clamping arms 130 can be clamped onto the terminal post 300 of the battery under test. The conductive rod 200 is movably disposed on the pivot shaft 110 and located between the two clamping arms 130. The conductive rod 200 can move forward relative to the pivot shaft 110 to press against the test part, or can move backward relative to the pivot shaft 110 to separate from the test part.

[0032] like Figure 2 , Figure 3As shown, in application, the clamping end 101 of the clamp body 100 is aligned with the battery terminal 300 and closed, and the pre-tightening force of the elastic element 120 is used to firmly fix it. Then, the conductive rod 200 is pushed forward along the pivot axis 110 until its front end is tightly attached to the surface of the terminal 300 to form a stable conductive path. Finally, the test host can be connected to quickly start the test. After the test is completed, the conductive rod 200 is pulled out in the reverse direction and the clamping arm 130 is released to remove the device. The battery is undamaged and can be reused.

[0033] The clamping device designed in this utility model adopts a compact pivot structure, and the clamping arm 130 opens and closes flexibly, making it suitable for operation in confined spaces. Through elastic adaptive clamping, a single person can complete precise operation with one hand, significantly improving testing efficiency. At the same time, its non-destructive connection method avoids damage to the battery caused by traditional probe welding, greatly reducing consumable costs. It is especially suitable for scenarios such as batch testing of power battery packs, and has the advantages of high precision, low cost and long life.

[0034] In one embodiment of this utility model, the conductive rod 200 is provided with threads; one end of the conductive rod 200 is provided with a first connecting portion 201 for connecting to the test part, and the other end is provided with a second connecting portion 202 for connecting to the test device; the pivot shaft 110 is provided with a threaded hole, and the conductive rod 200 is screwed into the threaded hole. Further, the first connecting portion 201 is a connecting surface for surface contact with the test part; the second connecting portion 202 is a connecting ring.

[0035] This embodiment achieves axial telescopic adjustment by rotating the conductive rod 200, allowing its contact end to precisely abut or separate from the test area. Combined with the elastic clamping design of the clamping arm 130, it can accommodate the testing needs of various battery terminal posts 300 or tabs, including cylindrical and square shapes. At the same time, the conductive rod 200 and the pivot shaft 110 adopt a threaded connection structure, which can be quickly completed by simply rotating the rod. It also facilitates the replacement of the conductive rod 200, effectively extending the overall service life of the device and significantly improving the flexibility of testing operations and maintenance efficiency.

[0036] In one embodiment of this utility model, the connecting ring is a circular ring with an inner diameter of 5-10 mm and an outer diameter of 15-20 mm. The conductive rod 200 is a cylindrical rod with a threaded section, the outer diameter of which is 5-15 mm. In application, the test leads of the testing host pass through the circular hole on the connecting ring and are wound around the ring, which improves the stability of the connection. The 5-10 mm inner diameter allows for the connection of test leads from various testing hosts.

[0037] In one embodiment of the present invention, the clamping arm 130 includes a clamping plate 131 and connecting plates 132 disposed on both sides of the clamping plate 131. The connecting plates 132 are provided with coaxial through holes 1321. The clamping end 101 and the non-clamping end 102 are located on the clamping plate 131. The pivot shaft 110 includes a first shaft segment 111, a second shaft segment 112, and a third shaft segment 113. The two second shaft segments 112 are disposed at both ends of the first shaft segment 111, and the two third shaft segments 113 are respectively disposed at the ends of the two second shaft segments 112 away from the first shaft segment 111. Each third shaft segment 113 passes through the two through holes 1321. The coaxial through hole 1321 of the connecting plate 132 is precisely matched with the three-section structure (first shaft section 111 / second shaft section 112 / third shaft section 113) of the pivot shaft 110, which not only ensures the concentricity of the rotational transmission, but also realizes the pivotal support of the clamping arm 130 through the third shaft section 113 penetrating the connecting plate 132, forming a stable double bearing mechanical structure and significantly reducing rotational friction resistance.

[0038] Furthermore, the clamping end 101 of the clamping arm 130 is provided with multiple fixing protrusions 133, which are used to clamp the test part. Each clamping plate 131 is provided with multiple fixing protrusions 133 spaced apart; the side of each fixing protrusion 133 facing away from the clamping plate 131 has an arc-shaped contact surface; when the two clamping arms 130 are in a preset position, the arc-shaped contact surfaces of the multiple fixing protrusions 133 are on the same circular / elliptical trajectory. In this embodiment, the arc-shaped contact surfaces of the fixing protrusions 133 form a continuous contact interface on the same circular / elliptical trajectory when the clamping arms 130 are closed. This design avoids stress concentration at a single point by applying pressure evenly at multiple points, and is particularly suitable for the full circumferential enveloping clamping of cylindrical pole pieces 300, or the synchronous locking of the four corners of square pole pieces, significantly improving clamping reliability.

[0039] In one embodiment of this utility model, the two ends of the elastic element 120 elastically abut against the non-clamping ends 102 of the two clamping arms 130, respectively. Specifically, the elastic element 120 includes two helical springs, each helical spring including a helical segment 121 and an extension segment 122 connected to both ends of the helical segment 121. The extension segment 122 extends away from the clamping end 101. The helical segment 121 is sleeved on the second shaft segment 112, and each extension segment 122 abuts against the clamping plate 131. The helical segment 121 of the helical spring, sleeved on the second shaft segment 112, provides radial constraint to prevent spring deflection, and the extension segment 122 abuts against the clamping plate 131 to form an axial preload closed loop, so that the clamping pressure is evenly distributed on the surface of the clamping plate 131. The spring parameters can be flexibly adjusted by the number of turns of the helical segment 121 and the length of the extension segment 122, in conjunction with the selection of elastic elements 120 with different stiffnesses.

[0040] In one embodiment of this utility model, the two connecting plates 132 of one clamping arm 130 are located between the two connecting plates 132 of the other clamping arm 130, forming a double-layer nested structure, which significantly reduces the overall width of the device and is suitable for testing scenarios involving narrow slits or sealed cavities inside power battery modules. Alternatively, the connecting plates 132 of the two clamping arms 130 are staggered to form an asymmetrical mechanical lever fulcrum, which allows the clamping arms 130 to maintain self-locking stability even when the opening angle is large.

[0041] This utility model embodiment also provides a battery testing system, including a testing host and a clamping device according to any of the above embodiments, to have all the effects of the clamping device. The test leads of the testing host are detachably connected to the conductive rod 200 of the clamping device.

[0042] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A clamping device for battery testing, characterized in that, It includes a clamp body (100) and a conductive rod (200). The clamp body (100) includes a pivot (110), an elastic element (120) and two clamping arms (130). The two clamping arms (130) are rotatably connected through the pivot (110) to form a clamping end (101) and a non-clamping end (102). The elastic element (120) is disposed between the two clamping arms (130) and is used to provide elastic force to the clamping arms (130) so that the clamping ends (101) of the two clamping arms (130) can be clamped onto the terminal (300) of the battery to be tested. The conductive rod (200) is movably disposed on the pivot shaft (110) and located between the two clamping arms (130); The conductive rod (200) can move forward relative to the pivot (110) to press against the test part, or can move backward relative to the pivot (110) to separate from the test part.

2. The clamping device according to claim 1, characterized in that, The conductive rod (200) is provided with threads; one end of the conductive rod (200) is provided with a first connecting part (201) for connecting the test part, and the other end is provided with a second connecting part (202) for connecting the test device. The pivot shaft (110) is provided with a threaded hole, and the conductive rod (200) is screwed into the threaded hole.

3. The clamping device according to claim 2, characterized in that, The first connecting part (201) is a connecting surface for surface contact with the test part; the second connecting part (202) is a connecting ring.

4. The clamping device according to claim 3, characterized in that, The connecting ring is a circular ring with an inner diameter of 5-10 mm and an outer diameter of 15-20 mm; The conductive rod (200) is a cylindrical rod with a threaded section, the outer diameter of which is 5-15mm.

5. The clamping device according to claim 1, characterized in that, The clamping arm (130) includes a clamping plate (131) and connecting plates (132) disposed on both sides of the clamping plate (131). The connecting plates (132) are provided with coaxial through holes (1321). The clamping end (101) and the non-clamping end (102) are located on the clamping plate (131). The pivot shaft (110) includes a first shaft segment (111), a second shaft segment (112), and a third shaft segment (113); two second shaft segments (112) are disposed at both ends of the first shaft segment (111), and two third shaft segments (113) are respectively disposed at the ends of the two second shaft segments (112) away from the first shaft segment (111); each third shaft segment (113) passes through two through holes (1321).

6. The clamping device according to claim 1, characterized in that, The two ends of the elastic element (120) are elastically abutted against the non-clamping ends (102) of the two clamping arms (130).

7. The clamping device according to claim 5, characterized in that, The elastic element (120) includes two helical springs, each of which includes a helical segment (121) and an extension segment (122) connected to both ends of the helical segment (121), the extension segment (122) extending away from the clamping end (101); the helical segment (121) is sleeved on the second shaft segment (112), and each of the extension segments (122) abuts against the clamping plate (131).

8. The clamping device according to claim 5, characterized in that, The clamping end (101) of the clamping arm (130) is provided with a plurality of fixing protrusions (133), which are used to cooperate in clamping the test part.

9. The clamping device according to claim 8, characterized in that, Each of the clamps (131) is provided with a plurality of fixed protrusions (133) spaced apart. The fixed protrusion (133) has an arc-shaped contact surface on the side opposite to the clamping plate (131); when the two clamping arms (130) are in the preset position, the arc-shaped contact surfaces of the multiple fixed protrusions (133) are on the same circular / elliptical trajectory.

10. A battery testing system, characterized in that, It includes a test host and a clamping device according to any one of claims 1 to 9, wherein the test lines of the test host are detachably connected to the conductive rod (200) of the clamping device.

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