Internal resistance test device for pack modules

Abstract

The present invention relates to the technical field of lithium battery production, and provides an internal resistance testing device for a pack module, comprising a stand and a slider; the stand is provided with a slide groove, which extends along the length direction of the stand; one end of the slide groove has a loading position, and the other end of the slide groove has a testing position, and the pack module is used to slide from the loading position to the testing position; the slider is movably arranged on the stand along the width direction of the stand, and the limit block on the slider is arranged near the middle of the slide groove, and the slider is connected to the stand through an elastic component; a test probe is provided on the slider; the slider has a first position and a second position, and when the slider is in the first position, the limit block abuts against the outer wall surface of the pack module; when the slider is in the second position, the pack module is located at the test position, the limit block is separated from the pack module, and the test probe abuts against the pack module; the present invention ensures the consistency of the internal resistance test of the pack module through the elastic force of the elastic component.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery production, and in particular to an internal resistance testing device for a pack module. Background Art

[0002] During the lithium battery production process, the performance parameters of the pack module need to be tested, and the internal resistance value of the pack module is one of the performance parameters.

[0003] The existing method for testing the internal resistance value of a pack module is to manually pick up the pack module and place it on a work surface, then manually pick up the positive and negative test chucks and bring them into contact with the pack module, and read the internal resistance value of the pack module using an internal resistance meter connected to the positive and negative test chucks. This manual testing method makes it difficult to ensure the consistency of the contact force between the test chuck and the pack module, resulting in poor consistency in test values, low test accuracy, and low test efficiency. Summary of the Invention

[0004] The present invention provides an internal resistance testing device for a pack module, which is used to solve or improve the problems of poor test consistency, low test accuracy and low test efficiency in the process of testing the internal resistance value of the existing pack module.

[0005] The present invention provides an internal resistance testing device for a pack module, comprising: a stand and a slider; the stand is provided with a slide groove, which extends along the length direction of the stand; one end of the slide groove has a loading position, and the other end of the slide groove has a testing position, and the pack module is used to slide from the loading position to the testing position; the slider is movably arranged on the stand along the width direction of the stand, the limit block on the slider is arranged near the middle of the slide groove, and the slider is connected to the stand through an elastic member; a test probe is provided on the slider; the slider has a first position and a second position, when the slider is in the first position, the pack module is located between the loading position and the testing position, and the limit block abuts against the outer wall surface of the pack module; when the slider is in the second position, the pack module is located at the testing position, the limit block is separated from the pack module, and the test probe abuts against the pack module.

[0006] According to an internal resistance testing device for a pack module provided by the present invention, the limit block has a guide surface, the guide surface is set at an acute angle to the extension direction of the slide groove, and the guide surface is used to connect with the outer wall surface of the pack module.

[0007] According to an internal resistance testing device for a pack module provided by the present invention, the elastic component includes a spring, the spring is arranged along the width direction of the stand, one end of the spring is connected to the stand, and the other end of the spring is connected to the slider.

[0008] According to an internal resistance testing device for a pack module provided by the present invention, a plurality of mounting holes are provided on the slider, and the plurality of mounting holes are arranged at intervals along the extension direction of the slide groove, and the limit block can be selectively connected to one of the mounting holes.

[0009] According to the present invention, an internal resistance testing device for a pack module is provided, wherein the test probe includes a probe body, a return spring and a needle; the probe body is connected to the slider, the needle is connected to the probe body via the return spring, and the needle is used to abut against the pack module.

[0010] According to an internal resistance testing device for a pack module provided by the present invention, two sliders are provided, and the two sliders are arranged on both sides of the slide groove along the width direction of the stand.

[0011] According to an internal resistance testing device for a pack module provided by the present invention, a barcode scanner fixing bracket is provided on the stand, and the barcode scanner fixing bracket is used to place the barcode scanner.

[0012] According to an internal resistance testing device for a pack module provided by the present invention, a wiring harness clamp is provided on the stand, and the wiring harness clamp is used to fix the wiring harness connected to the test probe.

[0013] According to the present invention, an internal resistance testing device for a pack module further includes: a lifting platform; the lifting platform is movably arranged on the platform along the height direction of the platform, and the slider is arranged on the lifting platform.

[0014] According to an internal resistance testing device for a pack module provided by the present invention, a locking structure is provided on the lifting platform, and the locking structure is used to lock the lifting platform on the stand.

[0015] The internal resistance testing device for the pack module provided by the present invention realizes stable contact of the test probe with the pack module under the action of the elastic component by pushing the pack module, thereby ensuring the consistency of the contact force between the test probe and the pack module, and further ensuring the consistency of the internal resistance value test; when it is necessary to test the internal resistance value of the pack module, the pack module is placed in the loading position of the slide slot, and the pack module is pushed toward the testing position; the slider has a tendency to move toward the slide slot under the action of the elastic component, so that the limit block can be located on the upper side of the bottom of the slide slot, that is, the projection of the limit block on the plane where the bottom of the slide slot is located intersects with the bottom of the slide slot, and when the pack module slides to the limit block, the outer wall surface of the pack module contacts the limit block, thereby squeezing the limit block, and the limit block and the slider move along the width direction of the stand toward the side away from the slide slot and compress the elastic component. At this time, the slider is in the first position, that is, the slider is expanded toward the outside of the slide slot by the sliding of the pack module, and the test probe and the slider are compressed. When the pack module is connected to the test block, the test probe also moves toward the outside of the slide groove, thereby avoiding the pack module to prevent the test probe from scratching the outer wall of the pack module when the pack module slides to the test position; when the pack module slides to the test position, the pack module is separated from the limit block, and the slider moves toward the side close to the slide groove under the elastic force of the elastic component, thereby driving the test probe to move toward the side close to the pack module until the test probe abuts against the pack module, and the internal resistance value is tested by the internal resistance meter connected to the test probe. At this time, the slider is in the second position. For the pack modules of the same batch, the outer dimensions of the pack modules are the same, and the relative positions of the slide groove and the test probe are fixed, that is, the elastic force applied by the elastic component to the test probe remains constant, thereby ensuring the consistency of the contact force between the test probe and the pack module, and then ensuring the consistency of the internal resistance value test, and correspondingly ensuring the accuracy of the test. At the same time, there is no need to manually apply pressure for testing, which improves the efficiency of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is one of the structural schematic diagrams of the internal resistance testing device for the pack module provided by the present invention;

[0018] Figure 2 This is the second structural diagram of the internal resistance testing device for the pack module provided by the present invention;

[0019] Figure 3 This is the third structural diagram of the internal resistance testing device for the pack module provided by the present invention;

[0020] Figure 4 It is a schematic structural diagram of the test probe provided by the present invention;

[0021] Figure 5 This is the fourth structural schematic diagram of the internal resistance testing device for the pack module provided by the present invention.

[0022] Reference numerals:

[0023] 1: Stand; 11: Slide; 2: Slider; 21: Mounting hole; 3: Pack module; 4: Limit block; 5: Elastic member; 6: Test probe; 61: Probe body; 62: Return spring; 63: Needle; 7: Barcode scanner fixing bracket; 8: Wire harness clamp; 9: Lifting platform. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0025] In the description of the embodiments of the present invention, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the embodiments of the present invention and to simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0027] The following combination Figures 1 to 5 The present invention describes an internal resistance testing device for a pack module.

[0028] like Figures 1 to 3 As shown, the internal resistance testing device for the pack module shown in this embodiment includes: a stand 1 and a slider 2.

[0029] A slide 11 is provided on the stand 1, which extends along the length direction of the stand 1; one end of the slide 11 has a loading position, and the other end of the slide 11 has a test position, and the pack module 3 is used to slide from the loading position to the test position; the slider 2 is movably arranged on the stand 1 along the width direction of the stand 1, and the limit block on the slider 2 is arranged near the middle of the slide 11, and the slider 2 is connected to the stand 1 through an elastic member 5; a test probe 6 is provided on the slider 2, and the test probe 6 is arranged near the test position; the slider 2 has a first position and a second position. When the slider 2 is in the first position, the pack module 3 is located between the loading position and the test position, and the limit block 4 abuts against the outer wall surface of the pack module 3; when the slider 2 is in the second position, the pack module 3 is located at the test position, the limit block 4 is separated from the pack module 3, and the test probe 6 abuts against the pack module 3.

[0030] Specifically, the internal resistance testing device for the pack module shown in this embodiment, by pushing the pack module 3, the test probe 6 is in stable contact with the pack module 3 under the action of the elastic member 5, thereby ensuring the consistency of the contact force between the test probe 6 and the pack module 3, and further ensuring the consistency of the internal resistance value test; when the internal resistance value of the pack module 3 needs to be tested, the pack module 3 is placed in the loading position of the chute 11, and the pack module 3 is pushed toward the test position, Figure 1 It shows that the pack module 3 is located at the loading position; the slider 2 has a tendency to move toward the chute 11 under the action of the elastic member 5, so that the limit block 4 can be located on the upper side of the bottom of the chute 11, that is, the projection of the limit block 4 on the plane where the bottom of the chute is located intersects with the bottom of the chute. When the pack module 3 slides to the limit block 4, the outer wall surface of the pack module 3 contacts the limit block 4, thereby squeezing the limit block 4. The limit block 4 and the slider 2 move along the width direction of the stand 1 toward the side away from the chute 11 and compress the elastic member 5. At this time, the slider 2 is in the first position. Figure 2It shows that the slider 2 is in the first position, that is, the slider 2 is expanded toward the outside of the slide groove 11 by sliding the pack module 3, and the test probe 6 is connected to the slider 2, then the test probe 6 also moves toward the outside of the slide groove 11, thereby avoiding the pack module 3, so as to prevent the test probe 6 from scratching the outer wall surface of the pack module 3 when the pack module 3 slides to the test position; when the pack module 3 slides to the test position, the pack module 3 is separated from the limit block 4, and the slider 2 moves toward the side close to the slide groove 11 under the elastic force of the elastic member 5, thereby driving the test probe 6 to move toward the side close to the pack module 3 until the test probe 6 abuts against the pack module 3, and the internal resistance value is tested by the internal resistance meter connected to the test probe 6. At this time, the slider 2 is in the second position. Figure 3 It shows that the slider 2 is in the second position. For the pack modules 3 of the same batch, the outer dimensions of the pack modules 3 are the same, and the relative positions of the slide groove 11 and the test probe 6 are fixed, that is, the elastic force applied by the elastic member 5 to the test probe 6 remains constant, thereby ensuring the consistency of the contact force between the test probe 6 and the pack module 3, and then ensuring the consistency of the internal resistance value test, and correspondingly ensuring the accuracy of the test. At the same time, there is no need to manually apply pressure for testing, which improves the efficiency of the test.

[0031] It should be noted that the length direction of the stand 1 shown in this embodiment is Figures 1 to 3 From left to right or from right to left, the width direction of the stand 1 is Figures 1 to 3 The direction from top to bottom or bottom to top.

[0032] In some embodiments, as Figures 1 to 3 As shown, the limit block 4 shown in this embodiment has a guide surface, which is set at an acute angle to the extension direction of the slide groove 11, and is used to connect with the outer wall surface of the pack module 3.

[0033] Specifically, the guide surface is an inclined surface. During the movement of the pack module 3 toward the test position, the outer wall surface of the pack module 3 can gradually push the slider 2 to expand outward through the guide surface, while compressing the elastic component 5 and driving the test probe 6 to move outward to avoid the pack module 3.

[0034] In some embodiments, as Figures 1 to 3As shown, the elastic member 5 shown in this embodiment includes a spring, which is arranged along the width direction of the stand 1, one end of the spring is connected to the stand 1, and the other end of the spring is connected to the slider 2. When the pack module 3 slides to the limit block 4, the pack module 3 squeezes the limit block 4 and drives the slider 2 to move, thereby squeezing the spring so that the spring generates elastic force. After the pack module 3 slides to the test position, the elastic force generated by the spring enables the test probe 6 to maintain stable contact with the pack module 3, thereby ensuring the consistency of the test.

[0035] In some embodiments, as Figures 1 to 3 As shown, the slider 2 shown in this embodiment is provided with a plurality of mounting holes 21 , and the plurality of mounting holes 21 are arranged at intervals along the extension direction of the slide groove 11 , and the limiting block 4 can be selectively connected to one of the mounting holes 21 .

[0036] Specifically, through the detachable connection between the limit block 4 and the slider 2, the relative distance between the limit block 4 and the test probe 6 can be adjusted to meet the testing requirements of pack modules 3 of different lengths. The relative distance between the limit block 4 and the test probe 6 is adapted to the length of the pack module 3, so that after the pack module 3 is separated from the limit block 4, the test probe 6 can just abut against the pack module 3 under the elastic force of the elastic component 5, so as to ensure the consistency of the abutment position of the test probe 6 on the pack module 3, thereby ensuring the accuracy of the test.

[0037] In some embodiments, as Figure 4 As shown, the test probe 6 shown in this embodiment includes a probe body 61, a return spring 62 and a needle 63; the probe body 61 is connected to the slider 2, and the needle 63 is connected to the probe body 61 through the return spring 62, and the needle 63 is used to abut against the pack module 3.

[0038] Specifically, after the pack module 3 slides to the test position, the slider 2 drives the test probe 6 to move toward the side close to the pack module 3 under the elastic force of the elastic component 5 until the needle 63 contacts the pack module 3. During the contact between the needle 63 and the pack module 3, the return spring 62 acts as a buffer for the needle 63 to avoid damage to the needle 63 due to excessive force between the needle 63 and the pack module 3.

[0039] In some embodiments, as Figures 1 to 3 As shown, two sliders 2 are provided in this embodiment, and the two sliders 2 are arranged on both sides of the slide groove 11 along the width direction of the platform 1.

[0040] Specifically, the two sliders 2 are symmetrically distributed on both sides of the slide groove 11, and each slider 2 is correspondingly provided with a limit block 4 and a test probe 6. When the pack module 3 slides to the limit block 4, the pack module 3 pushes the two sliders 2 to an expanded state, and at this time the relative distance between the two sliders 2 is relatively far; when the pack module 3 slides to the test position, the two sliders 2 approach each other under the action of the elastic component 5 until the test probe 6 abuts against the pack module 3, and at this time the relative distance between the two sliders 2 is relatively close.

[0041] In some embodiments, as Figures 1 to 3 As shown, the stand 1 shown in this embodiment is provided with a barcode scanner fixing bracket 7, and the barcode scanner fixing bracket 7 is used to place the barcode scanner.

[0042] Specifically, when the pack module 3 is at the loading position, the operator removes the barcode scanner from the barcode scanner holder 7 and scans the barcode information on the pack module 3, so as to match it with the subsequent internal resistance value test to record the internal resistance value of each pack module 3; after the test is completed, the barcode scanner is placed on the barcode scanner holder 7 for next use.

[0043] In some embodiments, as Figures 1 to 3 As shown, the stand 1 shown in this embodiment is provided with a harness clamp 8, which is used to fix the harness connected to the test probe 6. The harness is fixed by the harness clamp 8 to make the harness neater and avoid the messy harness from interfering with the test of the pack module 3.

[0044] In some embodiments, as Figure 5 As shown, the internal resistance testing device for the pack module shown in this embodiment further includes a lifting platform 9 , which is movably arranged on the platform 1 along the height direction of the platform 1 , and the slider 2 is arranged on the lifting platform 9 .

[0045] Specifically, the relative height between the slider 2 and the slide groove 11 is adjusted by the lifting platform 9 to adapt to pack modules 3 of different heights, so that the pack module 3 can contact the limit block 4 during the sliding process in the slide groove 11, thereby pushing the slider 2 to move toward the outside of the slide groove 11.

[0046] Among them, the height direction of the platform 1 is Figure 5 The direction from top to bottom or bottom to top.

[0047] In some embodiments, as Figure 5 As shown, the lifting platform 9 shown in this embodiment is provided with a locking structure, which is used to lock the lifting platform 9 on the platform 1. After the height of the lifting platform 9 is adjusted, the locking structure is locked so that the relative height between the lifting platform 9 and the slide groove 11 will not change.

[0048] The locking structure may be a fastening bolt.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An internal resistance testing device for a pack module, characterized in that: include: A stand, wherein a chute is provided on the stand, and the chute extends along the length direction of the stand; one end of the chute has a loading position, and the other end of the chute has a testing position, and the pack module is used to slide from the loading position to the testing position; A slider, the slider is movably provided on the platform along the width direction of the platform, the limit block on the slider is provided near the middle of the slide groove, the slider is connected to the platform via an elastic member; a test probe is provided on the slider; The slider has a first position and a second position. When the slider is in the first position, the pack module is located between the loading position and the test position, and the limit block abuts against the outer wall surface of the pack module; when the slider is in the second position, the pack module is located at the test position, the limit block is separated from the pack module, and the test probe abuts against the pack module.

2. The internal resistance testing device for a pack module according to claim 1, characterized in that: The limiting block has a guiding surface, the guiding surface is arranged at an acute angle to the extending direction of the sliding groove, and the guiding surface is used to be connected to the outer wall surface of the pack module.

3. The internal resistance testing device for a pack module according to claim 1, characterized in that: The elastic member includes a spring, which is arranged along the width direction of the stage, one end of the spring is connected to the stage, and the other end of the spring is connected to the slider.

4. The internal resistance testing device for a pack module according to claim 1, characterized in that: The sliding block is provided with a plurality of mounting holes, and the plurality of mounting holes are arranged at intervals along the extending direction of the sliding groove, and the limiting block can be selectively connected to one of the mounting holes.

5. The internal resistance testing device for a pack module according to claim 1, characterized in that: The test probe includes a probe body, a return spring and a needle; The probe body is connected to the slider, the needle is connected to the probe body via the return spring, and the needle is used to abut against the pack module.

6. The internal resistance testing device for a pack module according to claim 1, characterized in that: There are two sliders, which are arranged on both sides of the slide groove along the width direction of the platform.

7. The internal resistance testing device for a pack module according to claim 1, characterized in that: A barcode scanner gun fixing bracket is provided on the stand, and the barcode scanner gun fixing bracket is used for placing the barcode scanner gun.

8. The internal resistance testing device for a pack module according to claim 1, characterized in that: A wire harness clamp is provided on the stand, and the wire harness clamp is used to fix the wire harness connected to the test probe.

9. The internal resistance testing device for a pack module according to claim 1, characterized in that: Also includes: lift platform; The lifting platform is movably arranged on the platform along the height direction of the platform, and the slider is arranged on the lifting platform.

10. The internal resistance testing device for a pack module according to claim 9, characterized in that: The lifting platform is provided with a locking structure, and the locking structure is used to lock the lifting platform on the platform.

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