Testing device and calibration system

Abstract

The embodiment of the utility model provides a testing device and a calibration system. A test mainboard of the test device comprises a first test board and a second test board which are arranged at an interval along a third direction, the first test board comprises a plurality of first insulating boards and a plurality of first conductive boards, and the second test board comprises a plurality of second insulating boards and a plurality of second conductive boards. A first conductive plate is arranged between every two adjacent first insulating plates, the multiple second insulating plates are arranged at intervals in the second direction, a second conductive plate is arranged between every two adjacent second insulating plates, and the first conductive plates are electrically connected with the second conductive plates; the test assembly is electrically connected to the first conductive plate; the first cover plate is pressed on the first test plate, the first cover plate is detachably connected with the first insulating plate, the second cover plate is pressed on the second test plate, the second cover plate is detachably connected with the second insulating plate, and the tab of the battery cell is limited between the second cover plate and the second conductive plate.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to a testing device and a calibration system. Background Art

[0002] To ensure the performance of the battery cell, it is usually necessary to test the battery cell. The test of the battery cell includes the detection of the charging and discharging processes of the battery cell and the tests of the characteristics of the battery cell such as voltage, current, capacity, temperature, cycle life, etc.

[0003] Currently, when testing the battery cell, the tab of the battery cell is perforated and then fixed to the testing device by bolts.

[0004] However, since the above testing process requires perforating the tab of the battery cell and then fixing it with bolts, the process of installing the testing device on the battery cell is relatively complicated, thus reducing the difficulty of battery cell testing and the efficiency of battery cell testing. Summary of the Utility Model

[0005] To solve or partially solve the above problems, the utility model discloses a testing device and a calibration system to solve the problem that the process of installing the testing device on the battery cell in the prior art is relatively complicated.

[0006] To solve the above problems, in a first aspect, an embodiment of the utility model provides a testing device for testing a battery cell. The testing device has a first direction, a second direction, and a third direction that intersect pairwise;

[0007] It includes:

[0008] A test main board, the test main board includes a first test board and a second test board arranged at intervals along the third direction. The first test board includes a plurality of first insulating boards and a plurality of first conductive boards. The second test board includes a plurality of second insulating boards and a plurality of second conductive boards. The plurality of first insulating boards are arranged at intervals along the second direction, and one of the first conductive boards is arranged between every two adjacent first insulating boards. The plurality of second insulating boards are arranged at intervals along the second direction, and one of the second conductive boards is arranged between every two adjacent second insulating boards. The first conductive board and the second conductive board are electrically connected;

[0009] A test component, the test component is electrically connected to the first conductive board;

[0010] A first cover plate and a second cover plate, the first cover plate being pressed on the first test plate, and the first cover plate and the first insulating plate being detachably connected, the second cover plate being pressed on the second test plate, the second cover plate and the second insulating plate being detachably connected, and the tab of the battery cell being limited between the second cover plate and the second conductive plate.

[0011] Optionally, the testing device further includes a calibration component;

[0012] In the case where the tab of the battery cell is detached from the second conductive plate, the calibration component is detachably connected to the second conductive plate, and the calibration component is used to calibrate the testing component.

[0013] Optionally, the calibration component includes a base, a first conductor, a second conductor, and a calibration piece;

[0014] The base is disposed on one side of the test main board in the first direction;

[0015] The first conductor and the second conductor are spaced apart along the second direction on the base, the first conductor is limited between one of the two adjacent second conductive plates and the second cover plate, the second conductor is limited between the other of the two adjacent second conductive plates and the second cover plate, and the base and the calibration piece are electrically connected.

[0016] Optionally, the base includes a first sliding plate, a second sliding plate, and a bottom plate;

[0017] The first sliding plate and the second sliding plate are fixed on the bottom plate, the first conductor is slidably connected to the first sliding plate, the second conductor is slidably connected to the second sliding plate, the first conductor slides along the second direction, and the second conductor slides along the second direction.

[0018] Optionally, the first sliding plate is provided with a first chute, and the second sliding plate is provided with a second chute;

[0019] The first chute includes a first through groove extending along the second direction and a second through groove extending along the first direction, and the first through groove and the second through groove are communicated;

[0020] The second chute includes a third through groove extending along the second direction and a fourth through groove extending along the first direction, and the third through groove and the fourth through groove are communicated.

[0021] Optionally, a first magnet is provided on the first cover plate, and a second magnet is provided on the second cover plate;

[0022] A third magnet is provided on the surface of the first insulating plate facing the first cover plate, and a fourth magnet is provided on the surface of the second insulating plate facing the second cover plate. The first magnet and the third magnet are magnetically attracted to each other, the second magnet and the fourth magnet are magnetically attracted to each other, the first cover plate and the first insulating plate are magnetically connected, and the second cover plate and the second insulating plate are magnetically connected to each other.

[0023] Optionally, a plurality of first protrusions spaced along the second direction are provided on the surface of the first cover plate facing the first insulating plate, and a plurality of second protrusions spaced along the second direction are provided on the surface of the second cover plate facing the second insulating plate;

[0024] A first card slot is formed between two adjacent first insulating plates and the first conductive plate, and a second card slot is formed between two adjacent second insulating plates and the second conductive plate. The first protrusion is clamped in the first card slot, the second protrusion is clamped in the second card slot, and the tab of the battery cell is limited between the second protrusion and the second card slot.

[0025] Optionally, a first screw hole is provided on the first protrusion along the first direction, a second screw hole is provided on the first conductive plate along the first direction, and the first screw hole and the second screw hole are aligned in the first direction;

[0026] A third screw hole is provided on the second protrusion along the first direction, a fourth screw hole is provided on the second conductive plate along the first direction, and the third screw hole and the fourth screw hole are aligned in the first direction.

[0027] Optionally, the first test plate and the second test plate are movably connected, and the distance between the first test plate and the second test plate in the first direction is adjustable.

[0028] Optionally, the test device further includes a transmission member;

[0029] A receiving cavity extending along the third direction is formed inside the second insulating plate. The first insulating plate and the second insulating plate are connected by the transmission member, and the transmission member is used to drive at least a part of the first insulating plate to be received in the receiving cavity.

[0030] Optionally, the transmission member includes a gear and a rack;

[0031] The rack extends along the third direction and is arranged in the receiving cavity. The gear is fixed on the end of the first insulating plate facing the second insulating plate, and the gear meshes with the rack.

[0032] Second aspect, an embodiment of the present utility model further provides a calibration system, and the calibration system includes the test device according to any embodiment of the first aspect;

[0033] The test system includes a plurality of test devices, and the plurality of test devices are electrically connected;

[0034] The test device further includes a calibration component, and the plurality of test main boards and the calibration component are electrically connected.

[0035] Optionally, the calibration component includes a base, a first conductor, a second conductor, and a calibration piece;

[0036] The plurality of test main boards are connected in series on the same base through the first conductor and the second conductor, and the plurality of bases and the calibration piece are connected in parallel or in series.

[0037] In the embodiment of the present utility model, since the test main board includes a first test board and a second test board arranged at intervals along a third direction, the first test board includes a plurality of first insulating boards and a plurality of first conductive boards, the second test board includes a plurality of second insulating boards and a plurality of second conductive boards, the plurality of first insulating boards are arranged at intervals along a second direction, a first conductive board is arranged between every two adjacent first insulating boards, the plurality of second insulating boards are arranged at intervals along the second direction, a second conductive board is arranged between every two adjacent second insulating boards, the first conductive board and the second conductive board are electrically connected, and the test component is electrically connected to the first conductive board, the first test board and the second test board can be electrically connected through the first conductive board and the second conductive board, the current transmitted to the second conductive board can reach the test component via the first conductive board, and adjacent two first conductive boards can be insulated through the first insulating board, and adjacent two second conductive boards can be insulated through the second insulating board, so that each first conductive board and each second conductive board can transmit current independently. Also, since the first cover plate is pressed on the first test board, and the first cover plate and the first insulating board are detachably connected, the second cover plate is pressed on the second test board, the second cover plate and the second insulating board are detachably connected, and the tab of the battery cell is limited between the second cover plate and the second conductive board, the tab of the battery cell can be pressed on the second conductive board through the second cover plate without changing the structure. To sum up, through the test device provided by the embodiment of the present utility model, the tab of the battery cell can reach the test component via the first conductive board and the second conductive board to complete the test of the battery cell, and during the assembly process of the battery cell, the tab of the battery cell can be quickly installed between the second cover plate and the second conductive board without changing the structure of the tab of the battery cell, thereby simplifying the installation process of the battery cell, reducing the difficulty of battery cell testing, and improving the efficiency of battery cell testing. Description of the Drawings

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0039] Figure 1 It is a schematic structural diagram of a testing device provided by an embodiment of the present invention;

[0040] Figure 2 It is a schematic structural diagram of another testing device provided by an embodiment of the present invention;

[0041] Figure 3 It is a schematic structural diagram of a base included in a testing device provided by an embodiment of the present invention;

[0042] Figure 4 It is a partial schematic structural diagram of a calibration component included in a testing device provided by an embodiment of the present invention;

[0043] Figure 5 It is a schematic structural diagram of a base included in a testing device provided by an embodiment of the present invention;

[0044] Figure 6 It is a schematic structural diagram of a calibration system provided by an embodiment of the present invention.

[0045] Explanation of reference numerals:

[0046] 1: Testing main board; 11: First testing board; 111: First insulating board; 112: First conductive board; 1121: Second screw hole; 12: Second testing board; 121: Second insulating board; 122: Second conductive board; 1221: Fourth screw hole; 2: Testing component; 3: First cover plate; 31: First protrusion; 32: First screw hole; 4: Second cover plate; 41: Second protrusion; 42: Third screw hole; 5: Calibration component; 51: Base; 511: First sliding plate; 5111: First sliding groove; 51111: First through groove; 51112: Second through groove; 512: Second sliding plate; 5121: Second sliding groove; 51211: Third through groove; 51212: Fourth through groove; 513: Bottom plate; 52: First conductor; 53: Second conductor; 54: Calibration piece; 6: First magnet; 7: Second magnet; 8: Third magnet; 9: Fourth magnet.

[0047] 01: Testing device; 02: Calibration module; 03: Battery cell. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0049] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, the "in one embodiment" or "in an embodiment" that appears throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner.

[0050] As Figures 1 to 4 shown, a test device is used for testing the battery cell 03. The test device has a first direction Z, a second direction X, and a third direction Y that intersect pairwise, and includes:

[0051] A test main board 1, the test main board 1 includes a first test board 11 and a second test board 12 arranged at intervals along the third direction Y. The first test board 11 includes a plurality of first insulating boards 111 and a plurality of first conductive boards 112. The second test board 12 includes a plurality of second insulating boards 121 and a plurality of second conductive boards 122. The plurality of first insulating boards 111 are arranged at intervals along the second direction X, and a first conductive board 112 is arranged between every two adjacent first insulating boards 111. The plurality of second insulating boards 121 are arranged at intervals along the second direction X, and a second conductive board 122 is arranged between every two adjacent second insulating boards 121. The first conductive board 112 and the second conductive board 122 are electrically connected.

[0052] A test component 2, the test component 2 is electrically connected to the first conductive board 112.

[0053] A first cover plate 3 and a second cover plate 4. The first cover plate 3 is pressed on the first test board 11, and the first cover plate 3 and the first insulating board 111 are detachably connected. The second cover plate 4 is pressed on the second test board 12, the second cover plate 4 and the second insulating board 121 are detachably connected, and the tab of the battery cell 03 is limited between the second cover plate 4 and the second conductive board 122.

[0054] As can be seen from the above embodiments, since the test main board 1 includes a first test board 11 and a second test board 12 that are spaced apart along the third direction Y, the first test board 11 includes a plurality of first insulating boards 111 and a plurality of first conductive boards 112, the second test board 12 includes a plurality of second insulating boards 121 and a plurality of second conductive boards 122, the plurality of first insulating boards 111 are spaced apart along the second direction X, and a first conductive board 112 is disposed between every two adjacent first insulating boards 111, the plurality of second insulating boards 121 are spaced apart along the second direction X, and a second conductive board 122 is disposed between every two adjacent second insulating boards 121, the first conductive board 112 and the second conductive board 122 are electrically connected, and the test assembly 2 is electrically connected to the first conductive board 112. Therefore, the first test board 11 and the second test board 12 can be electrically connected through the first conductive board 112 and the second conductive board 122, the current transmitted to the second conductive board 122 can reach the test assembly 2 via the first conductive board 112, and the adjacent two first conductive boards 112 can be insulated through the first insulating board 111, and the adjacent two second conductive boards 122 can be insulated through the second insulating board 121, so that each first conductive board 112 and each second conductive board 122 can individually transmit current. Also, since the first cover plate 3 is pressed on the first test board 11, and the first cover plate 3 and the first insulating board 111 are detachably connected, the second cover plate 4 is pressed on the second test board 12, the second cover plate 4 and the second insulating board 121 are detachably connected, and the tab of the battery cell 03 is limited between the second cover plate 4 and the second conductive board 122. Therefore, the tab of the battery cell 03 can be pressed on the second conductive board 122 through the second change without changing the structure. In summary, through the test device provided by the embodiments of the present invention, the tab of the battery cell 03 can reach the test assembly 2 via the first conductive board 112 and the second conductive board 122 to complete the test of the battery cell 03. During the assembly process of the battery cell 03, the tab of the battery cell 03 can be quickly installed between the second cover plate 4 and the second conductive board 122 without changing the structure of the tab of the battery cell 03, thereby simplifying the installation process of the battery cell 03, reducing the difficulty of testing the battery cell 03, and improving the efficiency of testing the battery cell 03.

[0055] Among them, the first insulating plate 111 and the second insulating plate 121 in the above embodiments can be made of materials with high temperature resistance, low temperature resistance, corrosion resistance, and good insulation properties. The first conductive plate 112 and the second conductive plate 122 can be made of materials with high temperature resistance, low temperature resistance, corrosion resistance, and good electrical conductivity. One first conductive plate 112 is arranged between every two adjacent first insulating plates 111. In this way, multiple current transmission channels can be formed through the multiple first conductive plates 112. Similarly, one second conductive plate 122 is arranged between every two adjacent second insulating plates 121. In this way, multiple current transmission channels can be formed through the multiple second conductive plates 122. In the third direction Y, each first conductive plate 112 is electrically connected to the second conductive plate 122 located on the same straight line, so that a current transmission channel can be formed between the first conductive plate 112 and the second conductive plate 122 located on the same straight line in the three directions Y.

[0056] It should be noted that the number of first conductive plates 112 included in the first test board 11 is equal to the number of second conductive plates 122 included in the second test board 12. The number of first conductive plates 112 and the number of second conductive plates 122 are determined according to the channels of the current to be transmitted. Exemplarily, taking one positive electrode tab and one negative electrode tab included in the battery cell 03 as an example, the positive electrode tab and the negative electrode tab can be located on the same side of the battery cell 03. The number of first conductive plates 112 and the number of second conductive plates 122 are both two, then the number of first insulating plates 111 and the number of second insulating plates 121 are three. In this embodiment, the positive electrode tab is limited between one of the two adjacent second conductive plates 122 and the second cover plate 4, the negative electrode tab is limited between the other of the two adjacent second conductive plates 122 and the second cover plate 4, the positive electrode line of the test assembly 2 is electrically connected to one of the two adjacent first conductive plates 112, the negative electrode line of the test assembly 2 is electrically connected to the other of the two adjacent first conductive plates 112, and there is an electrical connection between the second conductive plate 122 connected to the positive electrode tab and the first conductive plate 112 connected to the positive electrode line, and there is an electrical connection between the second conductive plate 122 connected to the negative electrode tab and the first conductive plate 112 connected to the negative electrode line.

[0057] In addition, the positive projection of the first cover plate 3 in the first direction Z covers the positive projection of the first test plate 11 in the first direction Z, and the positive projection of the second cover plate 4 in the first direction Z covers the positive projection of the second test plate 12 in the first direction Z. The first cover plate 3 and the second cover plate 4 can be circular plate-like structures, square plate-like structures, or plate-like structures of other shapes. At least a part of the first cover plate 3 is in contact with the first conductive plate 112, and at least a part of the second cover plate 4 is in contact with the second conductive plate 122. In this way, combined with the detachable connection between the first cover plate 3 and the first insulating plate 111, and the detachable connection between the second cover plate 4 and the second insulating plate 121, it is convenient to press the first cover plate 3 onto the first test plate 11, and it is convenient to press the second cover plate 4 and the second insulating plate 121 onto the second test plate 12. It should be noted that the first cover plate 3 and the first insulating plate 111 can be detachably connected by means of magnetic attraction, snap connection, or screw connection, etc., and the second cover plate 4 and the second insulating plate 121 can be detachably connected by means of magnetic attraction, snap connection, or screw connection, etc. The embodiments of the present invention do not limit this. It should also be noted that in the embodiments of the present invention, the tab can include a first part and a second part that are bent. The first part extends along the first direction Z, and the second part extends along the third direction Y. The second part is limited between the second cover plate 4 and the second conductive plate 122, so that while the tab is fixed, the tab can be electrically connected to the second conductive plate 122.

[0058] In some embodiments, the test device further includes a calibration component 5; when the tab of the battery cell 03 is detached from the second conductive plate 122, the calibration component 5 is detachably connected to the second conductive plate 122, and the calibration component 5 is used to calibrate the test component 2.

[0059] In this embodiment, since the second cover plate 4 and the second insulating plate 121 are detachably connected, after the test of the battery cell 03 is completed, the second cover plate 4 can be separated from the first test plate 11, so that the tab of the battery cell 03 is released from the limit of the second cover plate 4, and the tab of the battery cell 03 can be detached. In this way, when the calibration component 5 is detachably connected to the second conductive plate 122, the calibration component 5 can be used to calibrate the accuracy of the test by the test component 2, thereby improving the accuracy of the test of the test device.

[0060] Further, regarding the structure of the calibration component 5, in some embodiments, the calibration component 5 includes a base 51, a first conductor 52, a second conductor 53, and a calibration piece 54; the base 51 is disposed on one side of the test main board 1 in the first direction Z; the first conductor 52 and the second conductor 53 are disposed on the base 51 at intervals along the second direction X. The first conductor 52 is limited between one of the two adjacent second conductive plates 122 and the second cover plate 4, and the second conductor 53 is limited between the other conductive plate of the two adjacent second conductive plates 122 and the second cover plate 4. The base 51 is electrically connected to the calibration piece 54.

[0061] In this embodiment, the base 51 is a carrier for mounting the first conductor 52 and the second conductor 53. The first conductor 52 can be an alternative conductor for the positive electrode, and the second conductor 53 can be an alternative conductor for the negative electrode. The first conductor 52 and the second conductor 53 can be in a rod shape, a plate shape, or other shapes. The first conductor 52 and the second conductor 53 can be fixed on the base 51 by welding, snap connection, screw connection, and other connection methods. The shapes of the first conductor 52 and the second conductor 53 can be consistent with the shape of the tab. That is, at least a part of the structures of the first conductor 52 and the second conductor are limited between the second cover plate 4 and the second conductive plate 122. Thus, since the first conductor 52 is limited between one of the two adjacent second conductive plates 122 and the second cover plate 4, and the second conductor 53 is limited between the other conductive plate of the two adjacent second conductive plates 122 and the second cover plate 4, the positive current signal can be transmitted to the positive electrode line of the test component 2 via the second conductive plate 122 and the first conductive plate 112 through the first conductor 52, and the negative current signal can be transmitted to the negative electrode line of the test component 2 via the second conductive plate 122 and the first conductive plate 112 through the second conductor 53. Also, since the base 51 is electrically connected to the calibration piece 54, the test component 2 can be calibrated through the calibration piece 54 to improve the accuracy of the test of the test component 2. It should be noted that in the embodiments of the present utility model, the test piece can include circuit test pieces such as an ammeter, a voltmeter, and an ohmmeter.

[0062] In some embodiments, the base 51 includes a first sliding plate 511, a second sliding plate 512, and a bottom plate 513; the first sliding plate 511 and the second sliding plate 512 are fixed on the bottom plate 513. The first conductor 52 is slidably connected to the first sliding plate 511, and the second conductor 53 is slidably connected to the second sliding plate 512. The first conductor 52 slides along the second direction (X), and the second conductor 53 slides along the second direction (X).

[0063] In this embodiment, since the first conductor 52 is slidably connected to the first sliding plate 511, and the second conductor 53 is slidably connected to the second sliding plate 512, the first conductor 52 slides along the second direction (X), and the second conductor 53 slides along the second direction (X). Therefore, by sliding the first conductor 52 on the first sliding plate 511 and sliding the second conductor 52 on the second sliding plate 512, the distance between the first conductor 52 and the second conductor 53 can be adjusted in the second direction X. In this way, the first conductor 52 and the second conductor 53 can meet the calibration requirements under the test requirements of different sizes of the battery cell 03 (the distances between the positive electrode tab and the negative electrode tab are different for different sizes of the battery cell 03, and the distances between two adjacent second conductive plates 122 are different), and further the calibration assembly 5 can have a wider applicable range.

[0064] It should be noted that the ways to realize the sliding of the first conductor 52 on the first sliding plate 511 and the sliding of the second conductor 52 on the second sliding plate 512 can be a chute and rail structure, a gear and rack structure, or other slidable structures. The embodiments of the present invention do not limit this.

[0065] Furthermore, in an exemplary embodiment, the first sliding plate 511 is provided with a first chute 5111, and the second sliding plate 512 is provided with a second chute 5121; the first chute 5111 includes a first through groove 51111 extending along the second direction X and a second through groove 51112 extending along the first direction Z, and the first through groove 51111 and the second through groove 51112 are communicated; the second chute 5121 includes a third through groove 51211 extending along the second direction X and a fourth through groove 51212 extending along the first direction Z, and the third through groove 51211 and the fourth through groove 51212 are communicated.

[0066] It should be noted that, in this embodiment, since the first chute 5111 includes a first through slot 51111 extending along the second direction X and a second through slot 51112 extending along the first direction Z, and the first through slot 51111 and the second through slot 51112 are connected, the first chute 5111 forms an L-shaped chute structure. When installing the first conductor 52, the first conductor 52 can first slide into the second through slot 51112 and then into the first through slot 51111. At the same time, the stability of the sliding can be maintained under the guiding action of the first through slot 51111. At the same time, since the second chute 5121 includes a third through slot 51211 extending along the second direction X and a fourth through slot 51212 extending along the first direction Z, and the third through slot 51211 and the fourth through slot 51212 are connected, the second chute 5121 forms an L-shaped chute structure. When installing the second conductor 53, the second conductor 53 can first slide into the fourth through slot 51212 and then into the third through slot 51211. At the same time, the stability of the sliding can be maintained under the guiding action of the third through slot 51211. In addition, the second through slot 51112 should extend beyond the end of the first sliding plate 511 in the first direction Z to facilitate the introduction of the first conductor 52, and the fourth through slot 51212 should extend beyond the end of the second sliding plate 512 in the first direction Z to facilitate the introduction of the second conductor 53. It should also be noted that a first roller can be provided on the first conductor 52 and a second roller can be provided on the second conductor 53, so that the first roller slides in the first through slot 51111 and the second roller slides in the third through slot 51211. In addition, screw holes can be provided on the first conductor 52 and the second conductor 53. When the first conductor 52 and the second conductor 53 slide to a predetermined position, bolts can pass through the screw holes on the first conductor 52 and the screw holes on the second conductor 53 to fix the relative positions of the first conductor 52 and the second conductor 53.

[0067] Next, the structure and other functions of the test device provided by the embodiment of the present invention will be specifically introduced as follows:

[0068] In some embodiments, a first magnet 6 is provided on the first cover plate 3, and a second magnet 7 is provided on the second cover plate 4; a third magnet 8 is provided on the surface of the first insulating plate 111 facing the first cover plate 3, and a fourth magnet 9 is provided on the surface of the second insulating plate 121 facing the second cover plate 4. The first magnet 6 and the third magnet 8 are magnetically attracted to each other, and the second magnet 7 and the fourth magnet 9 are magnetically attracted to each other. The first cover plate 3 and the first insulating plate 111 are magnetically connected, and the second cover plate 4 and the second insulating plate 121 are magnetically connected.

[0069] In this embodiment, since the first cover plate 3 and the first insulating plate 111 are magnetically connected, and the second cover plate 4 and the second insulating plate 121 are magnetically connected, it is convenient to disassemble and assemble the first cover plate 3 and the first test plate 11, and it is convenient to disassemble and assemble the second cover plate 4 and the second test plate 12, thereby facilitating the improvement of the testing efficiency of the battery cell 03.

[0070] In some embodiments, a plurality of first protrusions 31 are provided on the surface of the first cover plate 3 facing the first insulating plate 111 and are spaced along the second direction X. A plurality of second protrusions 41 are provided on the surface of the second cover plate 4 facing the second insulating plate 121 and are spaced along the second direction X. A first card slot is formed between two adjacent first insulating plates 111 and first conductive plates 112, and a second card slot is formed between two adjacent second insulating plates 121 and second conductive plates 122. The first protrusion 31 is clamped in the first card slot, and the second protrusion 41 is clamped in the second card slot. The tab of the battery cell 03 is limited between the second protrusion 41 and the second card slot.

[0071] In this embodiment, the number of the first protrusions 31 is the same as the number of the first conductive plates 112, and the number of the second protrusions 41 is the same as the number of the second conductive plates 122. There is a height difference in the first direction Z between the surface of the first insulating plate 111 facing the first cover plate 3 and the surface of the first conductive plate 112 facing the first cover plate 3. In this way, a first card slot is formed between two adjacent first insulating plates 111 and first conductive plates 112. There is a height difference in the first direction Z between the surface of the second insulating plate 121 facing the second cover plate 4 and the surface of the second conductive plate 122 facing the second cover plate 4. In this way, a second card slot is formed between two adjacent second insulating plates 121 and second conductive plates 122. In this way, the first protrusion 31 is clamped in the first card slot, and the detachable connection between the first cover plate 3 and the first test plate 11 can be limited by the clamping of the first protrusion 31 and the first card slot, facilitating the detachable connection between the first cover plate 3 and the first test plate 11. The detachable connection between the second cover plate 4 and the first test plate 11 is limited by the clamping of the second protrusion 41 and the second card slot. While facilitating the detachable connection between the second cover plate 4 and the second test plate, the tab of the battery cell 03 can be limited between the second protrusion 41 and the second conductive plate 122, that is, the tab of the battery cell 03 is pressed by the second protrusion 41, thereby facilitating the limitation of the tab of the battery cell 03.

[0072] In some embodiments, the first protrusion 31 is provided with a first screw hole 32 along the first direction Z, the first conductive plate 112 is provided with a second screw hole 1121 along the first direction Z, and the first screw hole 32 and the second screw hole 1121 are aligned in the first direction Z; the second protrusion 41 is provided with a third screw hole 42 along the first direction Z, the second conductive plate 122 is provided with a fourth screw hole 1221 along the first direction Z, and the third screw hole 42 and the fourth screw hole 1221 are aligned in the first direction Z.

[0073] In this embodiment, since the first protrusion 31 is provided with a first screw hole 32 along the first direction Z, the first conductive plate 112 is provided with a second screw hole 1121 along the first direction Z, and the first screw hole 32 and the second screw hole 1121 are aligned in the first direction Z, a bolt can be passed through the first screw hole 32 and the second screw hole 1121 to further fix the first cover plate 3 and the first test plate 11, further ensuring the tightness of the connection between the first cover plate 3 and the first test plate 11. At the same time, since the second protrusion 41 is provided with a third screw hole 42 along the first direction Z, the second conductive plate 122 is provided with a fourth screw hole 1221 along the first direction Z, and the third screw hole 42 and the fourth screw hole 1221 are aligned in the first direction Z, a bolt can be passed through the second screw hole 1121 and the fourth screw hole 1221 to further fix the second cover plate 4 and the second test plate 12, further ensuring the tightness of the connection between the second cover plate 4 and the second test plate 12.

[0074] In some embodiments, the first test plate 11 and the second test plate 12 are movably connected, and the distance between the first test plate 11 and the second test plate 12 in the first direction Z is adjustable.

[0075] In this way, since the distance between the first test plate 11 and the second test plate 12 in the first direction Z is adjustable, the first test plate 11 and the second test plate 12 can be separated or closed, so that the test main board 1 can adapt to the test requirements of different sizes of battery cells 03.

[0076] In some embodiments, the test device further includes a transmission member; an accommodation cavity extending along the third direction Y is formed inside the second insulating plate 121, and the first insulating plate 111 and the second insulating plate 121 are connected by the transmission member, and the transmission member is used to transmit at least a part of the first insulating plate 111 to be accommodated in the accommodation cavity.

[0077] In this embodiment, since the accommodating cavity extending along the third direction Y is provided inside the second test board 12, and the first test board 11 and the second test board 12 are connected by a transmission member for driving at least a part of the first test board 11 to be accommodated in the accommodating cavity, the space between the first test board 11 and the second test board 12 can be adjusted, that is, the relative area of the test main board 1 can be adjusted, which not only facilitates the handling of the test device, but also can adapt to the test requirements of different sizes of the battery cells 03. In addition, the transmission member can be a gear and rack structure, a cylinder push rod structure or a slide rail structure, and the embodiment of the present utility model does not limit this.

[0078] In a possible implementation manner, the transmission member includes a gear and a rack; the rack is arranged in the accommodating cavity along the third direction Y, and the gear is fixed on the end of the first insulating board 111 facing the second insulating board 121, and the gear meshes with the rack.

[0079] In this embodiment, since the rack is arranged in the accommodating cavity along the third direction Y, the gear is fixed on the end of the first insulating board 111 facing the second insulating board 121, and the gear meshes with the rack, when the gear rotates, the gear moves along the extending direction of the rack, and then the first insulating board 111 connected to the gear moves synchronously, so as to realize the sliding between the first insulating board 111 and the second insulating board 121.

[0080] As can be seen from the above embodiments, since the test main board 1 includes a first test board 11 and a second test board 12 arranged at intervals along the third direction Y, the first test board 11 includes a plurality of first insulating boards 111 and a plurality of first conductive boards 112, the second test board 12 includes a plurality of second insulating boards 121 and a plurality of second conductive boards 122, the plurality of first insulating boards 111 are arranged at intervals along the second direction X, and a first conductive board 112 is arranged between every two adjacent first insulating boards 111, the plurality of second insulating boards 121 are arranged at intervals along the second direction X, and a second conductive board 122 is arranged between every two adjacent second insulating boards 121, the first conductive board 112 and the second conductive board 122 are electrically connected, and the test component 2 is electrically connected to the first conductive board 112. Therefore, the first test board 11 and the second test board 12 can be electrically connected through the first conductive board 112 and the second conductive board 122, the current transmitted to the second conductive board 122 can reach the test component 2 via the first conductive board 112, and the adjacent two first conductive boards 112 can be insulated through the first insulating board 111, and the adjacent two second conductive boards 122 can be insulated through the second insulating board 121, so that each first conductive board 112 and each second conductive board 122 can transmit current independently. Also, since the first cover plate 3 is pressed on the first test board 11, and the first cover plate 3 and the first insulating board 111 are detachably connected, the second cover plate 4 is pressed on the second test board 12, the second cover plate 4 and the second insulating board 121 are detachably connected, and the tab of the battery cell 03 is limited between the second cover plate 4 and the second conductive board 122, the tab of the battery cell 03 can be pressed on the second conductive board 122 through the second cover plate 4 without changing the structure. In summary, through the test device provided by the embodiments of the present invention, the tab of the battery cell 03 can reach the test component 2 via the first conductive board 112 and the second conductive board 122 to complete the test of the battery cell 03. During the assembly process of the battery cell 03, the tab of the battery cell 03 can be quickly installed between the second cover plate 4 and the second conductive board 122 without changing the structure of the tab of the battery cell 03, thereby simplifying the installation process of the battery cell 03, reducing the difficulty of testing the battery cell 03, and improving the testing efficiency of the battery cell 03.

[0081] In some embodiments, as Figure 5 shown, the embodiments of the present invention further provide a calibration system. The calibration system includes the test device 01 of any of the above embodiments; the calibration system includes a plurality of test devices 01, and the plurality of test devices 01 are electrically connected; the test device 01 further includes a calibration component 5, and the plurality of test main boards 1 and the calibration component 5 are electrically connected.

[0082] In this embodiment, the number of test devices 01 included in the calibration system is determined according to the number of channels of the current to be calibrated, and the embodiments of the present invention do not limit this. In this way, since the calibration system includes multiple test devices 01 and the multiple test devices 01 are electrically connected, the calibration system can calibrate the multiple test devices 01 to improve the calibration efficiency.

[0083] For the connection mode of the above calibration system, in an exemplary connection mode, the calibration component 5 includes a base 51, a first conductor 52, a second conductor 53, and a calibration piece 54; multiple test main boards 1 are connected in series on the same base 51 through the first conductor 52 and the second conductor 53, and multiple bases 51 and the calibration piece 54 are connected in parallel or in series.

[0084] In this embodiment, the calibration system may include multiple calibration modules 02. Each calibration module 02 includes multiple test main boards 1. Each test main board 1 is fixed on the same base 51 through the first conductor 52 and the second conductor 53. The multiple calibration modules and the calibration pieces 54 are connected in parallel to calibrate the multiple test devices 01. Specifically, the base 51 includes a first sliding plate 511, a second sliding plate 512, and a bottom plate 513. The first sliding plate 511 and the second sliding plate 512 are fixed on the bottom plate 513. The first conductor 52 is slidably connected to the first sliding plate 511, and the second conductor 53 is slidably connected to the second sliding plate 512. When the first conductor 52 slides along the second direction (X) and the second conductor 53 slides along the second direction (X), the first conductor 52 included in each calibration component 5 can be arranged on the first sliding plate 511, the second conductor 53 included in each calibration component 5 can be arranged on the second sliding plate 512, multiple series-connected first conductors 52 can be used as the positive pole of the calibration system, and multiple series-connected second conductors 53 can be used as the negative pole of the calibration system. Then, multiple first sliding plates 511 and multiple second sliding plates 512 are connected in parallel or in series. When the calibration piece 54 includes a voltmeter, multiple first sliding plates 511 and multiple second sliding plates 512 are connected in parallel with the voltmeter. When the calibration piece 54 includes an ammeter, multiple first sliding plates 511 and multiple second sliding plates 512 are connected in series with the voltmeter. It should be noted that the calibration system can also be electrically connected to the control main board, and the multiple calibration modules 02 can be started simultaneously or several of the multiple calibration modules 02 can be started through the control main board, so that the calibration system can perform calibration automatically to improve the calibration efficiency.

[0085] Each embodiment in the specification is described in a progressive manner. The key point of each embodiment is the difference from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0086] Although the preferred embodiments of the embodiments of the present utility model have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present utility model.

[0087] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or terminal device comprising the said element.

[0088] The above has introduced the present utility model in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A test device for testing battery cells, characterized in that, The test device has a first direction, a second direction, and a third direction that intersect pairwise; It includes: A test main board, the test main board includes a first test board and a second test board arranged at intervals along the third direction. The first test board includes a plurality of first insulating boards and a plurality of first conductive boards. The second test board includes a plurality of second insulating boards and a plurality of second conductive boards. The plurality of first insulating boards are arranged at intervals along the second direction, and one first conductive board is arranged between every two adjacent first insulating boards. The plurality of second insulating boards are arranged at intervals along the second direction, and one second conductive board is arranged between every two adjacent second insulating boards. The first conductive board and the second conductive board are electrically connected; A test component, the test component is electrically connected to the first conductive board; A first cover plate and a second cover plate, the first cover plate is pressed on the first test board, and the first cover plate and the first insulating board are detachably connected. The second cover plate is pressed on the second test board, the second cover plate and the second insulating board are detachably connected, and the tab of the battery cell is limited between the second cover plate and the second conductive board.

2. The test device according to claim 1, wherein The test device further includes a calibration component; In the case where the tab of the battery cell is detached from the second conductive board, the calibration component is detachably connected to the second conductive board, and the calibration component is used to calibrate the test component.

3. The testing device according to claim 2, characterized in that, The calibration component includes a base, a first conductor, a second conductor, and a calibration piece; The base is provided on one side of the test main board in the first direction; The first conductor and the second conductor are arranged at intervals along the second direction on the base. The first conductor is limited between one of the two adjacent second conductive boards and the second cover plate, and the second conductor is limited between the other of the two adjacent second conductive boards and the second cover plate. The base and the calibration piece are electrically connected.

4. The test device according to claim 3, characterized in that The base includes a first sliding plate, a second sliding plate, and a bottom plate; The first sliding plate and the second sliding plate are fixed on the bottom plate. The first conductor is slidably connected to the first sliding plate, the second conductor is slidably connected to the second sliding plate, the first conductor slides along the second direction, and the second conductor slides along the second direction.

5. The testing device according to claim 4, characterized in that, The first sliding plate is provided with a first chute, and the second sliding plate is provided with a second chute; The first chute includes a first through groove extending along the second direction and a second through groove extending along the first direction, and the first through groove and the second through groove are communicated; The second chute includes a third through groove extending along the second direction and a fourth through groove extending along the first direction, and the third through groove and the fourth through groove are communicated.

6. The test device according to claim 1, wherein A first magnet is provided on the first cover plate, and a second magnet is provided on the second cover plate; A third magnet is disposed on the surface of the first insulating plate facing the first cover plate, and a fourth magnet is disposed on the surface of the second insulating plate facing the second cover plate. The first magnet and the third magnet attract each other magnetically, the second magnet and the fourth magnet attract each other magnetically, the first cover plate and the first insulating plate are magnetically connected, and the second cover plate and the second insulating plate are magnetically connected.

7. The test device according to claim 1, wherein, A plurality of first protrusions spaced along the second direction are disposed on the surface of the first cover plate facing the first insulating plate, and a plurality of second protrusions spaced along the second direction are disposed on the surface of the second cover plate facing the second insulating plate; A first card slot is formed between two adjacent first insulating plates and the first conductive plate, and a second card slot is formed between two adjacent second insulating plates and the second conductive plate. The first protrusion is clamped in the first card slot, the second protrusion is clamped in the second card slot, and the tab of the battery cell is limited between the second protrusion and the second card slot.

8. The test device according to claim 7, characterized in that A first screw hole is disposed along the first direction on the first protrusion, and a second screw hole is disposed along the first direction on the first conductive plate. The first screw hole and the second screw hole are aligned in the first direction; A third screw hole is disposed along the first direction on the second protrusion, and a fourth screw hole is disposed along the first direction on the second conductive plate. The third screw hole and the fourth screw hole are aligned in the first direction.

9. The test device according to claim 1, characterized in that, The first test plate and the second test plate are movably connected, and the distance between the first test plate and the second test plate in the first direction is adjustable.

10. The test device according to claim 9, characterized in that, The test device further includes a transmission member; An accommodating cavity extending along the third direction is formed inside the second insulating plate. The first insulating plate and the second insulating plate are connected by the transmission member, and the transmission member is used to drive at least a part of the first insulating plate to be accommodated in the accommodating cavity.

11. The test device according to claim 10, wherein, The transmission member includes a gear and a rack; The rack extends along the third direction and is disposed in the accommodating cavity. The gear is fixed on the end of the first insulating plate facing the second insulating plate, and the gear meshes with the rack.

12. A calibration system, characterized in that, The calibration system includes the test device according to any one of claims 1-11; The test system includes a plurality of test devices, and the plurality of test devices are electrically connected; The test device further includes a calibration component, and the plurality of test main boards and the calibration component are electrically connected.

13. The calibration system according to claim 12, wherein The calibration component includes a base, a first conductor, a second conductor, and a calibration member; The plurality of test main boards are connected in series on the same base through the first conductor and the second conductor, and the plurality of bases and the calibration member are connected in parallel or in series.

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