Detection device

Abstract

The utility model relates to detection equipment, which comprises a first electric connecting piece and a capacitance test circuit, the first electric connecting piece is provided with a first contact end and a second contact end, the first contact end is configured to abut against a first pole of a battery monomer, and the second contact end is configured to abut against a battery shell of a battery cell monomer; the positive electrode test point of the capacitance test circuit is electrically connected with the first electric connecting piece, and the negative electrode test point of the capacitance test circuit is configured to be electrically connected with the second pole of the single battery. The capacitance testing circuit is matched with the positive electrode testing point to electrically connect the first pole and the end cover at the same time through the first connecting piece, and the negative electrode testing point is electrically connected with the second pole, so that the capacitance value is detected, and whether a gap exists or is too large or not can be judged by comparing the detected capacitance value with a set capacitance value; the structure is simple, the use is convenient, the welding quality is improved, and the phenomenon of burning the battery cell is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery manufacturing technical field especially, it relates to a kind of detection equipment. BACKGROUND

[0002] In the battery field, lithium ion battery is widely used in portable electronic products such as computer, mobile phone and other portable electronic products due to high output voltage, high specific capacity, high safety and other advantages, and gradually becomes the leading power supply of electric vehicle (EV) and hybrid electric vehicle (HEV).

[0003] Current lithium ion battery has three forms: square aluminum shell, cylinder, soft package. Among them, square aluminum shell battery and cylindrical battery need to be laser welded with metal shell and metal end cover after completing the bare cell into shell, and the corresponding process is called end cover welding.

[0004] In the end cover welding process, metal shell and metal end cover need to be designed with appropriate tolerance and aligned to complete contact. If the contact position of end cover and shell cannot be fully contacted, laser will penetrate into the shell from the gap position of end cover and shell during laser welding and cause the bare cell inside the shell to be burned by laser, resulting in cell scrap.

[0005] Whether there is gap in the contact position of end cover and shell, there is no suitable technology to detect each cell at present. The commonly used method is artificial first piece inspection before production. If the first piece is welded well, batch production is started. But the first piece inspection method has the problem of low inspection frequency, and cannot take into account the input parameter fluctuation in process and the tolerance difference of aluminum shell incoming material, resulting in that part of products still have gap and burn cell during welding. SUMMARY

[0006] The technical problem to be solved by the utility model is to provide a detection equipment, which realizes the judgment of whether there is gap by detecting the capacitance of the gap.

[0007] The technical solution adopted by the utility model to solve its technical problem is:

[0008] A detection equipment for detecting the gap between end cover and shell, the detection equipment comprises a first electric connector and a capacitance test circuit, the first electric connector has a first contact end and a second contact end, the first contact end is configured to abut against the first pole of battery monomer, and the second contact end is configured to abut against the battery shell of cell monomer. The positive test point of the capacitance test circuit is electrically connected with the first electric connector, and the negative test point of the capacitance test circuit is configured to be electrically connected with the second pole of battery monomer.

[0009] Further specifically, an end face of the second contact end is provided with a first groove configured to be fitted with a first upper insulating piece of the battery cell; a groove bottom of the first groove is provided with the first contact end.

[0010] Further specifically, the first electrical connecting piece is provided with a first mounting hole; or the first electrical connecting piece is provided with a first mounting column.

[0011] Further specifically, the detection device further comprises a second electrical connecting piece having an insulating part and a conductive part, the conductive part being configured to be electrically connected with a negative test point of the capacitance test circuit; the insulating part and the conductive part are stacked and connected; a second groove is provided on a side of the insulating part away from the conductive part, the second groove penetrating through the insulating part and extending to the conductive part; the second groove is configured to be fitted with a second upper insulating piece of the battery cell; a groove bottom of the second groove is provided with a third contact end configured to abut against a second pole column of the battery cell.

[0012] Further specifically, the conductive part is provided with a second mounting hole; or the conductive part is provided with a second mounting column.

[0013] Further specifically, the detection device further comprises a resistance test circuit, a positive test point of the resistance test circuit being configured to be electrically connected with an end cover of the battery shell, and a negative test point of the resistance test circuit being configured to be electrically connected with a shell of the battery shell.

[0014] Further specifically, the capacitance test circuit and the resistance test circuit are both arranged in a multimeter.

[0015] Further specifically, the capacitance test circuit is arranged in a capacitance tester; and the resistance test circuit is arranged in an internal resistance tester.

[0016] Further specifically, the detection device further comprises a workbench having an insulating area configured to carry the battery cell.

[0017] Further specifically, the detection device further comprises a mounting clamp arranged on the workbench; the mounting clamp is configured to fix the battery cell on the workbench; wherein the mounting clamp comprises a first clamping plate and a second clamping plate arranged oppositely, the first clamping plate and the second clamping plate are configured to be arranged on opposite sides of the battery cell respectively, and the first clamping plate and the second clamping plate are both arranged to be insulated from the battery cell.

[0018] The utility model discloses a beneficial effect is: through the capacitance test circuit, and cooperate the anode test point realizes the electric connection first pole and end cover through the first connecting piece, the negative pole test point and second pole electric connection, realize the detection of capacitance value, so as to be able to compare the capacitance value detected with the set capacitance value to judge whether there is gap or gap is too big, simple structure, convenient to use, can quickly judge whether the battery monomer has gap or gap is too big, improve the welding quality, the phenomenon of burning the battery cell no longer occurs. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structure schematic diagram of the utility model detection equipment;

[0020] Figure 2 It is the structure schematic diagram of the first electric connecting piece of the utility model first kind of embodiment;

[0021] Figure 3 It is the structure schematic diagram of the first electric connecting piece of the utility model second kind of embodiment;

[0022] Figure 4 It is the structure schematic diagram of the first electric connecting piece of the utility model first kind of embodiment;

[0023] Figure 5 It is the structure schematic diagram of the second electric connecting piece of the utility model first kind of embodiment;

[0024] Figure 6 It is the structure schematic diagram of the second electric connecting piece of the utility model second kind of embodiment;

[0025] Figure 7 It is the structure schematic diagram of the second electric connecting piece of the utility model first kind of embodiment;

[0026] Figure 8 It is the structure schematic diagram of the detection equipment with resistance test circuit of the utility model.

[0027] In the drawing: 10, first electric connecting piece;11, first contact end;12, second contact end;13, first recess;15, first mounting hole;16, first mounting column;20, second electric connecting piece;21, insulating part;22, conductive part;23, third contact end;24, second recess;25, second mounting hole;26, second mounting column;30, capacitance test circuit;40, resistance test circuit;50, processing module;60, workbench;100, shell;200, end cover;300, first pole;310, first upper insulating part;320, second upper insulating part;400, second pole. DETAILED DESCRIPTION

[0028] The technical solutions of the present application will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0029] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0031] As Figure 1The utility model discloses a kind of detection equipment, for the gap detection between the end cover 200 of battery and shell 100, to judge whether it is suitable to weld end cover 200 and shell 100;The battery in the present application is a battery monomer, including battery shell and electric core that accommodate electric core, battery shell includes shell 100 with opening and end cover 200 for closing the opening of shell 100, electric core has different polarity first tab and second tab, end cover 200 is provided with first pole 300 and second pole 400, first pole 300 and second pole 400 are used to power supply to outside or charge to inside;The first tab of electric core and first pole 300 are electrically connected, the second tab of electric core and second pole 400 are electrically connected, wherein, to let first pole 300 and second pole 400 and end cover 200 be insulated, first upper insulating piece 310, second upper insulating piece 320 are provided on the side of end cover 200 away from electric core, and first upper insulating piece 310 is sleeved in first pole 300, second upper insulating piece 320 is sleeved in second pole 400, first upper insulating piece 310 is used to insulate end cover 200 and the part of first pole 300 that protrudes end cover 200, second upper insulating piece 320 is used to insulate end cover 200 and the part of second pole 400 that protrudes end cover 200.

[0032] The inventor finds that: the structure of electric core is similar to the structure of capacitor, and since the capacitance of capacitor is proportional to the opposite area of two plates and the dielectric constant of dielectric, and inversely proportional to the distance between two plates, therefore, after welding end cover 200 and shell 100, the battery shell connected by end cover 200 and shell 100 is equivalent to form an additional layer of capacitor structure with the internal electric core, which increases the overall capacitance value, wherein, the effective contact area of end cover 200 and shell 100 is related to the size of the above-mentioned increased capacitance value, that is, the larger the effective contact area of end cover 200 and shell 100, the larger the increased capacitance value.

[0033] Based on the above discovery, the inventor proposes as Figure 1The detection device shown for detecting the gap between the end cover 200 and the shell 100 comprises a first electrical connector 10 and a capacitance test circuit 30. The first electrical connector 10 has a first contact end 11 and a second contact end 12. The first contact end 11 is configured to abut against the first pole 300 of the battery monomer, and the second contact end 12 is configured to abut against the shell 100 of the battery monomer. The capacitance test circuit 30 has a positive test point and a negative test point. The positive test point is electrically connected to the first electrical connector 10, that is, the positive test point is electrically connected to the first pole 300 through the first contact end 11 of the first electrical connector 10, and is electrically connected to the battery shell of the battery monomer through the second contact end 12 of the first electrical connector 10. The negative test point is electrically connected to the second pole 400 of the battery monomer. The first pole 300 and the battery shell of the battery monomer are taken as one connection point of the capacitor, and the second pole 400 is taken as the other connection point of the capacitor, so that the size of the capacitance value can be measured. By comparing the obtained capacitance value with the set capacitance value, the closure condition of the end cover 200 and the shell 100 can be known, and then the battery that does not meet the welding requirements can be timely rejected according to the comparison result of the obtained capacitance value and the set capacitance value, so as to ensure that there is no problem of burning the battery cell when the end cover 200 and the shell 100 are welded.

[0034] Further, in order to facilitate the electrical connection of the first electrical connector 10, the first pole 300 and the battery shell, as shown in Figure 2 Figure 4 The first electrical connector 10 is a cylindrical member, and is made of conductive material. The bottom of the cylindrical member towards the battery shell is the second contact end 12. The end face of the second contact end 12 towards the battery shell is inwardly recessed to form a first recess 13. The first recess 13 is configured to be fitted with the first upper insulating member 310 of the battery monomer. The bottom of the first recess 13 is provided with the first contact end 11. When the first recess 13 of the cylindrical member is inserted and fitted with the first upper insulating member 310, the bottom of the cylindrical member, that is, the second contact end 12, abuts against the end cover 200 of the battery shell, and the first contact end 11 at the bottom of the first recess 13 abuts against the first pole 300. In this way, the quick electrical connection of the first electrical connector 10, the first pole 300 and the battery shell is ensured, and the connection of the first electrical connector 10, the first pole 300 and the battery shell is also ensured.

[0035] It should be noted that in order to ensure that the first contact end 11 and the first pole 300 abut against each other without abutting against the first upper insulating member 310, as shown in Figure 4 The end of the first pole 300 away from the battery cell is designed to protrude from the first upper insulating member 310.

[0036] ​Further, in order to facilitate the connection between the positive test point of the capacitance test circuit 30 and the first electrical connecting member 10, the first electrical connecting member 10 is provided with a first mounting hole 15 or a first mounting column 16 for realizing the electrical connection with the positive test point; when the positive test point is a test rod, the corresponding first electrical connecting member 10 is provided with the first mounting hole 15, and at this time, the test rod is inserted into the first mounting hole 15; when the positive test point is a test clamp, the corresponding first electrical connecting member is provided with the first mounting column 16, and at this time, the test clamp is clamped on the first mounting column 16.

[0037] Specifically, referring to FIG. 1, the first electrical connecting member 10 is provided with a first mounting hole 15 on the side of the cylindrical member away from the battery shell. Figure 2 It is to be noted that in order to ensure the formation of the first mounting hole 15, the bottom of the first groove 13 is raised to form the first contact end 11 towards the battery shell; referring to FIG. 2, the first electrical connecting member 10 is provided with a first mounting column 16 on the side of the cylindrical member away from the battery shell. Figure 3 It is to be noted that in order to ensure the formation of the first mounting hole 15, the bottom of the first groove 13 is raised to form the first contact end 11 towards the battery shell; referring to FIG. 2, the first electrical connecting member 10 is provided with a first mounting column 16 on the side of the cylindrical member away from the battery shell.

[0038] Further, in order to facilitate the connection between the negative test point of the capacitance test circuit 30 and the second pole 400 of the battery monomer, the present application further includes a second electrical connecting member 20, so that the negative test point of the capacitance test circuit 30 can be electrically connected to the second pole 400 through the second electrical connecting member 20, wherein since the second electrical connecting member 20 is only electrically connected to the second pole 400, when designing the second electrical connecting member 20, the second electrical connecting member 20 has an insulating part 21 and a conductive part 22, the conductive part 22 is used to electrically connect with the second pole 400, so as to realize the electrical connection between the conductive part 22 and the negative test point, and the insulating part 21 is used to isolate the conductive part 22 from the battery end cover 200.

[0039] Specifically, referring to FIG. 3, the second electrical connecting member 20 is provided with a second mounting hole 25 on the side of the cylindrical member away from the battery shell. Figure 5 - Figure 7As shown, the second electrical connecting piece 20 is a cylindrical piece, the insulating part 21 and the conductive part 22 are stacked and connected, the insulating part 21 and the conductive part 22 are integrated, the movement of the conductive part 22 can realize the simultaneous movement of the conductive part 22 and the insulating part 21; a second groove 24 is arranged on the side end face of the insulating part 21 away from the conductive part 22, the second groove 24 penetrates the insulating part 21 and extends into the conductive part 22; the second groove 24 is configured to be fitted with the second upper insulating part 320 of the battery monomer, the groove bottom of the second groove 24 is provided with a third contact end 23, the third contact end 23 is configured to abut against the second pole 400; when the second groove 24 of the second electrical connecting piece 20 and the second upper insulating part 320 are inserted and matched, the insulating part 21 of the second electrical connecting piece 20 and the end cover 200 of the battery shell abut at the same time, the third contact end 23 arranged on the groove bottom of the second groove 24 and the second pole 400 abut, so that the negative test point of the capacitance test circuit 30 is electrically connected with the second pole 400 through the second electrical connecting piece 20.

[0040] It should be noted that the insulating part 21 can be integrated with the conductive part 22 by injection molding, or can be integrated with the conductive part 22 by clamping or bonding; in addition, it should be noted that, referring to Figure 7 As shown, in order to ensure the abutment of the third contact end 23 and the second pole 400, the end of the second pole 400 away from the electric core protrudes from the second upper insulating part 320.

[0041] It should be further noted that, since there are various structures of the battery monomer, i.e., various assembly structures of the first pole 300, the second pole 400 and the battery shell, the specific structure of the first electrical connecting piece 10 and the second electrical connecting piece 20 is not unique, i.e., the structure design of the first electrical connecting piece 10 is adapted to the assembly structure of the first pole 300 and the battery shell, and the structure design of the second electrical connecting piece 20 is adapted to the assembly structure of the second pole 400 and the battery shell, as long as the first electrical connecting piece 10 can contact the first pole 300 and the battery shell at the same time, and the second electrical connecting piece 20 can contact the second pole 400 and be insulated from the battery shell at the same time.

[0042] Further, in order to facilitate the connection of the negative test point of the capacitance test circuit 30 and the second electrical connecting piece 20, a second mounting hole 25 or a second mounting column 26 is arranged on the conductive part 22, which is used to realize the electrical connection with the negative test point of the capacitance test circuit 30; when the negative test point of the capacitance test circuit 30 is a test rod, the corresponding conductive part 22 is provided with a first mounting hole 15, at this time the test rod is inserted into the first mounting hole 15; when the negative test point of the capacitance test circuit 30 is a test clamp, the corresponding conductive part 22 is provided with a second mounting column 26, at this time the test clamp is clamped on the second mounting column 26.

[0043] Based on the above-mentioned capacitance test circuit 30, in order to ensure that the result of detecting whether there is a gap between the end cover 200 and the shell 100 is correct, the inventor finds that the effective contact area of the end cover 200 and the shell 100 is also related to the size of the contact resistance value, that is, the larger the effective contact area of the end cover 200 and the shell 100, the larger the contact resistance value, as shown in the following formula: Figure 8 The test device also includes a resistance test circuit 40, which includes a positive test point and a negative test point, the positive test point is configured to be electrically connected with the end cover 200 of the battery shell, and the negative test point is configured to be electrically connected with the shell 100 of the battery shell.

[0044] After the resistance value is measured by the resistance test circuit 40, it is compared with the set resistance value, that is, the closing condition of the end cover 200 and the shell 100 can be understood, and then whether the gap between the end cover 200 and the shell 100 is too large can be judged according to the comparison result of the measured resistance value and the set resistance value; in this application, through the cooperation of the capacitance test circuit 30 and the resistance test circuit 40, a more accurate judgment result is finally obtained, that is, when the capacitance value obtained by the capacitance test circuit 30 is less than the set capacitance value, and the resistance value obtained by the resistance test circuit 40 is less than the set capacitance value, it is determined that there is no gap or the gap exists but will not affect the welding; if one of the capacitance test circuit 30 and the resistance test circuit 40 exceeds the set value, it is an unqualified product and needs to be reworked.

[0045] It should be noted that the positive test point and the negative test point of the resistance test circuit 40 are both test rods, which can be held by hand during testing to make the two test rods of the resistance test circuit 40 abut against the end cover 200 and the shell 100, and the hand-held method is only suitable for small batch or sampling detection, in order to realize batch detection, the two test rods of the resistance test circuit 40 can be controlled by a mechanical hand to realize automation; similarly, the positive test point and the negative test point of the capacitance test circuit 30 are both test rods, before testing, the two test rods of the capacitance test circuit 30 are respectively inserted into the first mounting hole 15 on the first electric connector 10 and the second mounting hole 25 on the second electric connector 20, and then during testing, the first electric connector 10 and the first upper insulating piece 310 can be inserted and matched by hand, and the second electric connector 20 and the second upper insulating piece 320 can be inserted and matched by hand, and the hand-held method is only suitable for small batch or sampling detection, in order to realize batch detection, the first electric connector 10 and the second electric connector 20 can be controlled by a mechanical hand to realize automation.

[0046] Further, the capacitance testing circuit 30 and the resistance testing circuit 40 can be directly integrated in the same multimeter, which is convenient for the user to operate. Of course, the capacitance testing circuit 30 can be arranged in a capacitance tester, and the resistance testing circuit 40 can be arranged in a resistance tester, and the resistance tester and the capacitance tester are arranged independently.

[0047] It should be noted that when the capacitance testing circuit 30 and the resistance testing circuit 40 are integrated in the multimeter, the multimeter needs to be configured with a gear selection circuit. The gear selection circuit is electrically connected to the capacitance testing circuit 30 and the resistance testing circuit 40 through a diode switch, so that the gear selection circuit determines whether the measured object is a resistance or a capacitance by controlling the diode switch. The measurement circuit of the multimeter in which the capacitance testing circuit 30 and the resistance testing circuit 40 are integrated is prior art, and the specific circuit connection will not be described here. As long as the resistance value and the capacitance value can be measured, it is acceptable.

[0048] It should be further noted that in order to facilitate the testing of resistance values and capacitance values, when the capacitance testing circuit 30 and the resistance testing circuit 40 are integrated in the multimeter, the multimeter can be directly configured with two test rods for resistance value testing, and two test rods connected to the first electrical connector 10 and the second electrical connector 20 for capacitance value testing.

[0049] Further, in order to achieve the purpose of automatic detection, the capacitance testing circuit 30 and the resistance testing circuit 40 can be electrically connected to the processing module 50, and the processing module 50 is further connected with an alarm device. After the processing module 50 compares and processes the capacitance value measured by the capacitance testing circuit 30 with the set capacitance value, and compares and processes the resistance value measured by the resistance testing circuit 40 with the set capacitance value, the processing module 50 triggers the alarm device according to the processing result, thereby facilitating the operator to timely eliminate unqualified products.

[0050] The present application is convenient for carrying the battery monomer. The battery monomer is arranged on the workbench 60, and the workbench 60 has an insulating area for carrying the battery monomer. The insulating area prevents the battery monomer from being in conduction with the workbench 60, thereby improving the accuracy of the battery monomer detection.

[0051] Further, in order to stably arrange the battery cell on the insulating area of the workbench 60, the application further comprises a mounting clamp arranged on the workbench 60 and configured to fix the battery cell on the workbench 60; wherein the mounting clamp comprises a first clamp plate and a second clamp plate arranged oppositely, and the first clamp plate and the second clamp plate are configured to be arranged on opposite sides of the battery cell respectively, and the first clamp plate and the second clamp plate can be used to fix and clamp the battery cell from opposite sides thereof, so as to facilitate the abutment between the test points of the capacitance test circuit 30, the test points of the resistance test circuit 40 and the battery cell.

[0052] It should be noted that, in order to avoid the first clamp plate and the second clamp plate affecting the test results, the first clamp plate and the second clamp plate are both arranged in an insulating manner with the battery shell, and specifically, an insulating layer, for example, an insulating rubber layer, is arranged on the surface of the first clamp plate and the second clamp plate in contact with the battery cell.

[0053] It should also be understood that, in order to facilitate the clamping of the battery cell, at least one of the first clamp plate and the second clamp plate is arranged movably, which can be achieved by a driving device, for example, a cylinder, a motor or the like; the first clamp plate can be fixed on the workbench 60, and the second clamp plate moves towards or away from the first clamp plate through the driving device; of course, the first clamp plate and the second clamp plate can also be designed to move simultaneously, and the first clamp plate and the second clamp plate are driven by the driving device, and the first clamp plate and the second clamp plate can move towards or away from each other simultaneously, and specifically, the driving device comprises a motor and a ball screw nut pair, the motor and the screw rod are in transmission connection, opposite threads are arranged on the screw rod, and the first clamp plate and the second clamp plate are arranged on the opposite threads correspondingly.

[0054] Further, the above structure can be integrated into a welding platform to realize automatic welding and automatic detection and alarm, for example, a detection station and a welding station are arranged, a multimeter with the capacitance test circuit 30 and the resistance test circuit 40 is arranged at the detection station, and a laser welding device is arranged at the welding station; the battery cell with the completed end cover 200 and the shell 100 is placed on the insulating area of the workbench, and the mounting clamp is controlled to clamp and fix the battery cell; then the workbench is conveyed to the detection station, so that the capacitance value and the resistance value can be tested, and the measured capacitance value and resistance value can be processed at the same time; when the test result that the gap between the end cover 200 and the shell 100 is too large is obtained, an alarm is given and the workbench is conveyed to a defective product processing station to remove the defective product; and when the test result that there is no gap or the gap is too small between the end cover 200 and the shell 100 is obtained, the workbench is conveyed to the welding station, so that the laser welding device performs the welding work of the end cover 200 and the shell 100.

[0055] In summary, through the capacitor test circuit 30, and cooperating with the positive test point through the first connecting piece, the first pole 300 and the end cover 200 are electrically connected at the same time, the negative test point is electrically connected with the second pole 400, the detection of the capacitance value is realized, the existence of the gap or the gap is too large is judged by comparing the detected capacitance value with the set capacitance value, the structure is simple, convenient to use, the existence of the gap or the gap is too large of the battery monomer can be quickly judged, the welding quality is improved, and the phenomenon of burning the battery cell no longer occurs.

[0056] It should be emphasized that: the above is only the preferred embodiment of the present application, not any form of the present application, any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belongs to the scope of the technical scheme of the present application.

Claims

1. A detection device, characterized by A detection device for detecting a gap between an end cover (200) and a shell (100), the detection device comprising a first electrical connector (10) and a capacitance test circuit (30), the first electrical connector (10) having a first contact end (11) configured to abut against a first pole (300) of a battery cell and a second contact end (12) configured to abut against a battery shell of the battery cell, and the capacitance test circuit (30) having a positive test point electrically connected to the first electrical connector (10) and a negative test point configured to be electrically connected to a second pole (400) of the battery cell.

2. The detection device of claim 1, wherein, An end surface of the second contact end (12) is provided with a first groove (13) configured to be fitted with a first upper insulating member (310) of the battery cell, and a bottom of the first groove (13) is provided with the first contact end (11).

3. The detection device of claim 2, wherein, The first electrical connector (10) is provided with a first mounting hole (15), or the first electrical connector (10) is provided with a first mounting post (16).

4. The detection device of claim 1, wherein, The detection device further comprises a second electrical connector (20) having an insulating portion (21) and a conductive portion (22), the conductive portion (22) being configured to be electrically connected to the negative test point of the capacitance test circuit (30), the insulating portion (21) and the conductive portion (22) being stacked and connected, a side of the insulating portion (21) facing away from the conductive portion (22) being provided with a second groove (24) extending through the insulating portion (21) and extending to the conductive portion (22), the second groove (24) being configured to be fitted with a second upper insulating member (320) of the battery cell, and a bottom of the second groove (24) being provided with a third contact end (23) configured to abut against the second pole (400) of the battery cell.

5. The detection device of claim 4, wherein, The conductive portion (22) is provided with a second mounting hole (25), or the conductive portion (22) is provided with a second mounting post (26).

6. The detection device according to any one of claims 1 to 5, characterized in that The detection device further comprises a resistance test circuit (40) having a positive test point configured to be electrically connected to the end cover (200) of the battery shell and a negative test point configured to be electrically connected to the shell (100) of the battery shell.

7. The detection device of claim 6, wherein, The capacitance test circuit (30) and the resistance test circuit (40) are both arranged in a multimeter.

8. The detection device of claim 6, wherein, The capacitance test circuit (30) is arranged in a capacitance tester, and the resistance test circuit (40) is arranged in an internal resistance tester.

9. The detection device of claim 6, wherein, The detection device further comprises a workbench (60) having an insulating area configured to carry the battery cell.

10. The detection device of claim 9, wherein, The detection device further comprises a mounting clamp arranged on the workbench (60); the mounting clamp is configured to fix the battery monomer on the workbench (60); wherein the mounting clamp comprises a first clamping plate and a second clamping plate arranged oppositely, the first clamping plate and the second clamping plate are configured to be arranged on opposite sides of the battery monomer respectively, and the first clamping plate and the second clamping plate are both arranged in insulation with the battery monomer.

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