Cylindrical battery test fixture

Abstract

The utility model discloses a cylindrical battery test fixture, it includes: the support frame of support plate formation and set gradually in the first pole connecting assembly, at least one limit block and second pole connecting assembly of support surface, the drive end of first pole connecting assembly's elevating drive is connected with the first installation block of first test probe, limit block is provided with the notch, the second installation block of second pole connecting assembly is provided with second test probe, the column body of cylindrical battery is inserted into the notch and two ends are respectively with the first test probe and second test probe of test appearance electric connection abut, to make test appearance can test the voltage and / or internal resistance of cylindrical battery, wherein limit block is detachably connected in the support surface and through elevating drive to drive first test probe moves close and with the structure of cylindrical battery end abut, can adapt multiple specifications and different state's cylindrical battery, and promote the contact stability of first test probe and the end of cylindrical battery.

Description

Technical Field

[0001] This utility model relates to the field of cylindrical battery testing technology, and more particularly to a cylindrical battery testing fixture. Background Technology

[0002] In the battery production process, cylindrical batteries of various specifications (18650, 21700, etc.) need to undergo testing of open circuit voltage (OCV) and DC internal resistance (DCR) parameters after spot welding to ensure the quality of cylindrical batteries. However, existing testing equipment suffers from poor compatibility with cylindrical batteries of different specifications (various radial and axial dimensions) and different states (with or without boss caps) and insufficient stability of the contact between the test probe and the battery electrode. This results in low accuracy and efficiency of test results, failing to meet the needs of flexible, efficient and accurate production testing. Utility Model Content

[0003] The purpose of this invention is to provide a cylindrical battery testing fixture that can adapt to cylindrical batteries of various specifications and in different states and can make stable contact with the end of the cylindrical battery, thereby improving the accuracy and efficiency of battery testing.

[0004] To achieve the above objectives, this utility model provides a cylindrical battery testing fixture, which includes: Support frame, first pole connecting assembly, at least one limiting block, and second pole connecting assembly. The support frame includes a vertically extending support plate, one surface of which is formed as a support surface. The first pole connecting component, the limiting block, and the second pole connecting component are sequentially arranged vertically on the support surface. The first pole connecting component includes a lifting driver and a first mounting block. The lifting driver is connected to the support surface, and the first mounting block is connected to the driving end of the lifting driver. At least one vertically extending first test probe is provided through the first mounting block. The limiting block is detachably connected to the support surface. At least one vertically penetrating notch is provided on the side of the limiting block away from the support surface. The second pole connecting component includes a second mounting block fixedly connected to the support surface. At least one vertically extending second test probe is provided through the second mounting block. The first test probe and the second test probe are electrically connected to the tester. The cylindrical battery is inserted into the notch, and one end of the cylindrical battery abuts against the second test probe. The lifting driver is used to drive the first test probe to move vertically closer to and abut against the other end of the cylindrical battery. The tester tests the voltage and / or internal resistance of the cylindrical battery through the first test probe and the second test probe.

[0005] Preferably, the inner wall of the notch is an arc-shaped surface.

[0006] Preferably, the inner sidewall of the notch is formed with at least one receiving groove, and a magnetic element is disposed in the receiving groove, the magnetic element being magnetically connected to the cylindrical battery.

[0007] Preferably, the magnetic component is cylindrical, and the magnetic component is interference-fitted with the receiving groove and bonded to the bottom wall of the receiving groove.

[0008] Preferably, the limiting block has a plurality of second screw holes spaced laterally on the side near the supporting surface, and the supporting plate has a plurality of through holes corresponding to the second screw holes, and the disassembly screw passes through the through holes and is threadedly connected to the second screw holes.

[0009] Preferably, the support surface is provided with two limiting blocks at vertical intervals, the two limiting blocks extend laterally and are arranged parallel to each other, each limiting block is provided with two notches at horizontal intervals, the first mounting block is provided with two first test probes at horizontal intervals, and the second mounting block is provided with two second test probes at horizontal intervals.

[0010] Preferably, the support frame further includes a base plate and at least one upright plate, the upright plate and the support plate being fixedly connected to the upper surface of the base plate, the upright plate being fixedly connected to the side of the support plate facing away from the support surface, and the included angle between the support plate and the base plate being less than 90 degrees.

[0011] Preferably, the first pole connection assembly further includes a mounting plate and an adjusting bolt. One side of the mounting plate is fixedly connected to the lifting drive, and the other side is provided with a first screw hole. The support plate is provided with at least one through-hole extending vertically. The adjusting bolt includes a head and a stud portion. The stud portion passes through the slotted hole and is threadedly connected to the first screw hole. The head abuts against the side of the support plate opposite to the support surface.

[0012] Preferably, the first mounting block has a first connecting groove on the side facing away from the cylindrical battery, a first connecting hole extending outward in the middle of the bottom wall of the first connecting groove, a first flange extending outward from the middle of the first test probe, a nut in the first connecting groove, a thread on the end of the first test probe away from the cylindrical battery and threadedly connected to the nut through the first connecting hole, and the first flange abutting against the side of the first mounting block facing the cylindrical battery.

[0013] Preferably, the second mounting block has a second connecting groove on the side facing the cylindrical battery, a second connecting hole extending outward in the middle of the bottom wall of the second connecting groove, connecting screw holes on both sides of the bottom wall of the second connecting groove, a second flange extending outward from the middle of the second test probe, a third connecting hole extending vertically on both sides of the second flange, the end of the second test probe away from the cylindrical battery passing through the second connecting hole, the second flange abutting against the bottom wall of the second connecting groove, and a connecting screw passing through the third connecting hole and threadedly connected to the connecting screw hole.

[0014] Compared with the prior art, the support plate of this utility model has a support surface. The first pole connecting component, the limiting block, and the second pole connecting component are arranged vertically on the support surface. The driving end of the lifting driver of the first pole connecting component is connected to a first mounting block through which the first test probe passes. The limiting block is provided with a notch. The second mounting block of the second pole connecting component is through which the second test probe passes. The first test probe and the second test probe are electrically connected to the tester. The cylindrical body of the cylindrical battery is inserted into the notch and its two ends abut against the first test probe and the second test probe respectively, so that the tester can test the voltage and / or internal resistance of the cylindrical battery. The structure in which the limiting block is detachably connected to the support surface can be adapted to cylindrical batteries with different radial dimensions. The structure in which the lifting driver drives the first test probe to move closer to and abut against the end of the cylindrical battery can be adapted to cylindrical batteries with different axial dimensions, with or without boss caps. It can also improve the contact stability between the first test probe and the end of the cylindrical battery, which is beneficial to improving the accuracy and efficiency of battery testing. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the cylindrical battery testing fixture according to an embodiment of the present invention.

[0016] Figure 2 This is a cross-sectional view of the cylindrical battery testing fixture according to an embodiment of the present invention.

[0017] Figure 3 This is an exploded structural diagram of the cylindrical battery testing fixture according to an embodiment of the present invention. Detailed Implementation

[0018] To explain in detail the technical content, structural features, objectives and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0019] Please see Figures 1 to 3 This utility model discloses a cylindrical battery testing fixture, which includes: 1. Support frame; 2. First pole connecting assembly; 3. At least one limiting block; 4. Second pole connecting assembly. The support frame 1 includes a vertically extending support plate 11, one surface of which is formed as a support surface 111. A first pole connecting component 2, a limiting block 3, and a second pole connecting component 4 are sequentially arranged vertically on the support surface 111. The first pole connecting component 2 includes a lifting driver 21 and a first mounting block 22. The lifting driver 21 is connected to the support surface 111, and the first mounting block 22 is connected to the driving end of the lifting driver 21. At least one vertically extending first test probe 23 is provided through the first mounting block 22. The limiting block 3 is detachably connected to the support surface 111, and at least one vertically extending notch 31 is provided on the side of the limiting block 3 away from the support surface 111. The second pole connecting component 4 includes a second mounting block 41 fixedly connected to the support surface 111. At least one vertically extending second test probe 42 is provided through the second mounting block 41. The first test probe 23 and the second test probe 42 are electrically connected to the tester. The cylindrical battery 100 is inserted into the notch 31, and one end of the cylindrical battery 100 abuts against the second test probe 42. The lifting driver 21 is used to drive the first test probe 23 to move vertically closer to and abut against the other end of the cylindrical battery 100. The tester tests the voltage and / or internal resistance of the cylindrical battery 100 through the first test probe 23 and the second test probe 42.

[0020] Compared with the prior art, the support plate 11 of this utility model forms a support surface 111. The first pole connecting component 2, the limiting block 3, and the second pole connecting component 4 are arranged vertically on the support surface 111. The driving end of the lifting driver 21 of the first pole connecting component 2 is connected to a first mounting block 22 through which the first test probe 23 passes. The limiting block 3 is provided with a notch 31. The second mounting block 41 of the second pole connecting component 4 is through which the second test probe 42 passes. The first test probe 23 and the second test probe 42 are electrically connected to the tester. The cylindrical body of the cylindrical battery 100 is inserted into the notch 31 and its two ends are respectively connected to the first test probe 23 and the second test probe 42. The second test probe 42 abuts against the cylindrical battery 100 so that the tester can test the voltage and / or internal resistance of the cylindrical battery 100. The structure in which the limiting block 3 is detachably connected to the support surface 111 can be adapted to cylindrical batteries 100 with different radial dimensions. The structure in which the first test probe 23 is moved closer to and abuts against the end of the cylindrical battery 100 by the lifting driver 21 can be adapted to cylindrical batteries 100 with different axial dimensions, with or without boss caps. It can also improve the contact stability between the first test probe 23 and the end of the cylindrical battery 100, which is beneficial to improving the accuracy and efficiency of battery testing.

[0021] See Figures 1 to 3 The inner wall of the notch 31 is curved, which is conducive to fitting and conforming to the outer wall of the cylindrical battery 100, so as to accurately position the cylindrical battery 100.

[0022] See Figures 1 to 3 The inner sidewall of the notch 31 has at least one receiving groove 32, and a magnetic element 33 is provided in the receiving groove 32. The magnetic element 33 is magnetically connected to the cylindrical battery 100 so that the cylindrical body of the cylindrical battery 100 is more stably connected to the limiting block 3.

[0023] Furthermore, the magnetic component 33 is cylindrical, and the magnetic component 33 is interference-fitted with the receiving groove 32 and bonded and fixed to the bottom wall of the receiving groove 32.

[0024] See Figures 1 to 3 The limiting block 3 has multiple second screw holes spaced laterally on the side near the support surface 111. The support plate 11 has multiple through holes 112 corresponding to the second screw holes. The disassembly screw 113 passes through the through hole 112 and is threaded into the second screw hole. This is beneficial for adapting cylindrical batteries 100 with different radial dimensions by disassembling and replacing other limiting blocks 3, thereby improving the quality and efficiency of battery production and testing.

[0025] Specifically, in this embodiment, corresponding limit blocks 3 are provided for 18650 batteries and 21700 batteries with different radial dimensions. The curvature of the notch 31 of different limit blocks 3 is adapted to the radial dimensions of 18650 batteries and 21700 batteries respectively. When testing the corresponding batteries, the corresponding limit blocks 3 are replaced by disassembling the screw 113 and the second screw hole, but it is not limited to this.

[0026] See Figures 1 to 3 The support surface 111 is provided with two limiting blocks 3 at vertical intervals. The two limiting blocks 3 extend laterally and are arranged parallel to each other. Each limiting block 3 is provided with two notches 31 at horizontal intervals. The first mounting block 22 is provided with two first test probes 23 at horizontal intervals. The second mounting block 41 is provided with two second test probes 42 at horizontal intervals. The arrangement of the two limiting blocks 3 helps to ensure that the axial direction of the cylindrical battery 100 is aligned with the first test probes 23 and the second test probes 42.

[0027] Specifically, in this embodiment, the first test probe 23 and the second test probe 42 are the positive electrode probe and the negative electrode probe, respectively. The first test probe 23 is connected to the P+ and R+ terminals of the battery comprehensive tester through the red terminal wire, and the second test probe 42 is connected to the P- and R- terminals of the tester through the black terminal wire, but is not limited thereto.

[0028] See Figures 1 to 3 The support frame 1 also includes a base plate 114 and at least one upright plate 115. The upright plate 115 and the support plate 11 are fixedly connected to the upper surface of the base plate 114. The upright plate 115 is fixedly connected to the side of the support plate 11 facing away from the support surface 111. The included angle between the support plate 11 and the base plate 114 is less than 90 degrees.

[0029] Specifically, in this embodiment, two upright plates 115 are provided and are arranged parallel to each other. The upright plates 115 are arranged perpendicular to each other and the contact surface with the support plate 11 is inclined, so that the support plate 11 is inclined relative to the bottom plate 114. Rubber pads 116 are provided at the four opposite corners of the bottom surface of the bottom plate 114, but not limited to this.

[0030] Specifically, in this embodiment, the base plate 114, the upright plate 115, and the support plate 11 are all made of 10mm thick bakelite board, and are fixedly connected to each other by cup-head hexagonal screws. The strength of the bakelite board helps to improve the structural stability of the support frame 1, while the insulation of the bakelite board helps to avoid leakage interference during the test, further ensuring the stability of the test.

[0031] See Figures 1 to 3 The first pole connection assembly 2 also includes a mounting plate 24 and an adjusting bolt 25. One side of the mounting plate 24 is fixedly connected to the lifting drive 21, and the other side is provided with a first screw hole. The support plate 11 is provided with at least one through hole 117 extending vertically. The adjusting bolt 25 includes a head 251 and a stud portion 252. The stud portion 252 passes through the slot 117 and is threadedly connected to the first screw hole. The head 251 abuts against the side of the support plate 11 away from the support surface 111.

[0032] The fixed position of the mounting plate 24 is adjusted by changing the position of the adjusting bolt 25 relative to the waist hole 117, thereby changing the initial distance between the lifting drive 21 and the first mounting block 22 and the second mounting block 41. This is beneficial for adapting to cylindrical batteries 100 with different axial dimensions and ensures that the first test probe 23 is in stable contact with the end of the battery.

[0033] By adjusting the height of the cylinder and replacing the limit block 3, it can be adapted to fix batteries of different specifications, thereby enabling OCV and DCR testing of 18650 and 21700 batteries with or without raised caps.

[0034] Specifically, in this embodiment, the lifting driver 21 is a cylinder with a stable and controllable air pressure of 0.5 MPa. Its air inlet is connected to the air outlet of the pedal through an air pipe, and the air inlet of the pedal is connected to the air source of the production line through an air pipe to form a pneumatic drive circuit. By controlling the pneumatic pedal, the air source is controlled to charge the cylinder, thereby controlling the cylinder to push the first mounting block 22 toward the cylindrical battery 100 and making the first test probe 23 contact the battery, ensuring reliable contact between the battery and the probe during the test and improving the accuracy of OCV and DCR tests.

[0035] See Figures 1 to 3The first mounting block 22 has a first connecting groove 221 on the side facing away from the cylindrical battery 100. The bottom wall of the first connecting groove 221 has a first connecting hole 222 extending outward. The middle of the first test probe 23 extends outward to form a first flange portion 231. A nut 223 is provided in the first connecting groove 221. The end of the first test probe 23 away from the cylindrical battery 100 is provided with a thread and passes through the first connecting hole 222 to be threadedly connected to the nut 223. The first flange portion 231 abuts against the side of the first mounting block 22 facing the cylindrical battery 100.

[0036] Specifically, in this embodiment, the nut 223 is an M8 thin nut, and the first test probe 23 and the second test probe 42 are provided with a cloverleaf probe at the end close to the cylindrical battery 100, which abuts against the end of the cylindrical battery 100, but are not limited thereto.

[0037] See Figures 1 to 3 The second mounting block 41 has a second connecting groove 411 on the side facing the cylindrical battery 100. The bottom wall of the second connecting groove 411 has a second connecting hole 412 extending outward in the middle. The bottom wall of the second connecting groove 411 has connecting screw holes 413 on both sides. The middle of the second test probe 42 extends outward to form a second flange portion 421. The second flange portion 421 has a third connecting hole 422 extending vertically on both sides. The end of the second test probe 42 away from the cylindrical battery 100 passes through the second connecting hole 412. The second flange portion 421 abuts against the bottom wall of the second connecting groove 411. The connecting screw 43 passes through the third connecting hole 422 and is threaded into the connecting screw hole 413.

[0038] The modular design of the first test probe 23 and the second test probe 42 facilitates maintenance and replacement.

[0039] Specifically, in this embodiment, the second mounting block 41 has a plurality of third screw holes spaced laterally on the side near the support surface 111, and the support plate 11 has a plurality of through holes 112 corresponding to the third screw holes. The mounting screws 118 pass through the through holes 112 and are threadedly connected to the third screw holes. The lower surface of the second mounting block 41 is also provided with a mounting plate seat 44. One side wall of the mounting plate seat 44 abuts against the support part, and the end of the mounting plate seat 44 away from the second mounting block 41 is connected to the base plate 114, which is beneficial to the stability of the second mounting block 41 installed on the support plate 11, but is not limited thereto.

[0040] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model application shall still fall within the scope of the present utility model.

Claims

1. A cylindrical battery testing fixture, characterized in that, include: Support frame, first pole connecting assembly, at least one limiting block, and second pole connecting assembly. The support frame includes a vertically extending support plate, one surface of which is formed as a support surface. The first pole connecting component, the limiting block, and the second pole connecting component are sequentially arranged vertically on the support surface. The first pole connecting component includes a lifting driver and a first mounting block. The lifting driver is connected to the support surface, and the first mounting block is connected to the driving end of the lifting driver. At least one vertically extending first test probe is provided through the first mounting block. The limiting block is detachably connected to the support surface. At least one vertically penetrating notch is provided on the side of the limiting block away from the support surface. The second pole connecting component includes a second mounting block fixedly connected to the support surface. At least one vertically extending second test probe is provided through the second mounting block. The first test probe and the second test probe are electrically connected to the tester. The cylindrical battery is inserted into the notch, and one end of the cylindrical battery abuts against the second test probe. The lifting driver is used to drive the first test probe to move vertically closer to and abut against the other end of the cylindrical battery. The tester tests the voltage and / or internal resistance of the cylindrical battery through the first test probe and the second test probe.

2. The cylindrical battery testing fixture according to claim 1, characterized in that, The inner wall of the notch is an arc-shaped surface.

3. The cylindrical battery testing fixture according to claim 1, characterized in that, The inner wall of the notch is formed with at least one receiving groove, and a magnetic element is disposed in the receiving groove, which is magnetically connected to the cylindrical battery.

4. The cylindrical battery testing fixture according to claim 3, characterized in that, The magnetic component is cylindrical, and it is interference-fitted with the receiving groove and bonded to the bottom wall of the receiving groove.

5. The cylindrical battery testing fixture according to claim 1, characterized in that, The limiting block has a plurality of second screw holes spaced laterally on the side near the supporting surface, and the supporting plate has a plurality of through holes corresponding to the second screw holes. The disassembly screw passes through the through holes and is threaded into the second screw holes.

6. The cylindrical battery testing fixture according to claim 1, characterized in that, The support surface is provided with two limiting blocks at vertical intervals. The two limiting blocks extend laterally and are arranged parallel to each other. Each limiting block is provided with two notches at horizontal intervals. The first mounting block is provided with two first test probes at horizontal intervals. The second mounting block is provided with two second test probes at horizontal intervals.

7. The cylindrical battery testing fixture according to claim 1, characterized in that, The support frame further includes a base plate and at least one upright plate. The upright plate and the support plate are fixedly connected to the upper surface of the base plate. The upright plate is fixedly connected to the side of the support plate facing away from the support surface. The angle between the support plate and the base plate is less than 90 degrees.

8. The cylindrical battery testing fixture according to claim 1, characterized in that, The first pole connection assembly also includes a mounting plate and an adjusting bolt. One side of the mounting plate is fixedly connected to the lifting drive, and the other side is provided with a first screw hole. The support plate is provided with at least one through hole that extends vertically. The adjusting bolt includes a head and a stud. The stud passes through the slot and is threadedly connected to the first screw hole. The head abuts against the side of the support plate opposite to the support surface.

9. The cylindrical battery testing fixture according to claim 1, characterized in that, The first mounting block has a first connecting groove on the side facing away from the cylindrical battery. The bottom wall of the first connecting groove has a first connecting hole extending outward. The middle of the first test probe extends outward to form a first flange. A nut is provided in the first connecting groove. The end of the first test probe away from the cylindrical battery is threaded and passes through the first connecting hole to be threadedly connected to the nut. The first flange abuts against the side of the first mounting block facing the cylindrical battery.

10. The cylindrical battery testing fixture according to claim 1, characterized in that, The second mounting block has a second connecting groove on the side facing the cylindrical battery. The bottom wall of the second connecting groove has a second connecting hole extending outward in the middle. The bottom wall of the second connecting groove has connecting screw holes on both sides. The middle of the second test probe extends outward to form a second flange. The second flange has a third connecting hole extending vertically on both sides. The end of the second test probe away from the cylindrical battery passes through the second connecting hole. The second flange abuts against the bottom wall of the second connecting groove. The connecting screw passes through the third connecting hole and is threaded into the connecting screw hole.

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