Electrode assembly detection device

Abstract

The utility model belongs to the technical field of electrode assembly production, and particularly relates to an electrode assembly detection device. The clamping mechanism comprises a support and two limiting pieces, the support is rotatably installed on the fixing frame, the two limiting pieces are installed on the support in a relatively movable mode in the first direction, and a clamping area for fixing the electrode assembly to be tested is formed between the two limiting pieces; the detection mechanism comprises an induced magnetic field and a detection circuit, the clamping mechanism is located in the induced magnetic field, and the detection circuit is electrically connected with positive and negative electrodes of the to-be-detected electrode assembly; the rotating mechanism is installed on the fixing frame and used for controlling the support to rotate; when the to-be-detected electrode assembly rotates, the induced magnetic field is cut; the electrode assembly detection device has the beneficial effects that the electrode assembly to be detected is limited and fixed on the bracket, then the bracket is driven by the rotating mechanism to rotate to drive the electrode assembly to cut an induced magnetic field, and whether an internal short circuit exists in the electrode assembly is judged by detecting whether an induced current is formed or not through the detection circuit, so that the electrode assembly detection device is convenient and practical.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrode assembly production, and in particular relates to an electrode assembly detection device. Background Art

[0002] A battery typically includes a casing and an electrode assembly housed in the casing. Currently, there are two main methods for producing electrode assemblies. One is to form a core by winding the electrode sheets and diaphragms, and the other is to form a core by stacking the electrode sheets and diaphragms. Both types of electrode assemblies require the tabs to be folded and pre-welded after forming. During the pre-welding process, the welding slag generated may fall into the electrode assembly. The presence of welding slag in the electrode assembly may cause the diaphragm in the electrode assembly to be punctured, thereby causing an internal short circuit in the electrode assembly and affecting the use of the battery. Utility Model Content

[0003] The purpose of the present utility model is to provide an electrode assembly detection device for detecting whether there is an internal short circuit in the electrode assembly in order to solve the above-mentioned technical problems.

[0004] In view of this, the present invention provides an electrode assembly detection device, comprising:

[0005] Fixed frame;

[0006] The clamping mechanism includes a bracket and two limiting members, the bracket is rotatably mounted on the fixing frame, the two limiting members are relatively movable along a first direction on the bracket, and a clamping area for fixing the electrode assembly to be tested is formed between the two limiting members;

[0007] The detection mechanism includes an induced magnetic field and a detection circuit. The clamping mechanism is located in the induced magnetic field, and the detection circuit is electrically connected to the positive and negative electrodes of the electrode assembly to be tested.

[0008] A rotating mechanism is installed on the fixed frame and is used to control the rotation of the bracket;

[0009] When the electrode assembly to be inspected rotates, the induced magnetic field is cut.

[0010] Furthermore, the clamping mechanism further comprises:

[0011] A guide member is mounted on the bracket, and two limiting members are movably mounted on the guide member along a first direction;

[0012] The driving module is installed on the bracket and is used to drive the two limiting members to move along the first direction X to abut against the electrode assembly to be tested.

[0013] Furthermore, the driver module includes:

[0014] A bidirectional screw, the bidirectional screw being rotatably mounted on the bracket;

[0015] a first motor, wherein a driving end of the first motor is connected to the bidirectional screw and is used to control the rotation of the bidirectional screw;

[0016] The two limiting members are respectively threadedly connected to the two sections of the thread structure of the bidirectional screw.

[0017] Furthermore, the driving module includes:

[0018] Two screw rods, the two screw rods are coaxially installed on the bracket;

[0019] Two second motors, the driving ends of the two second motors are respectively connected to the two screw rods, and are respectively used to drive the two screw rods to rotate;

[0020] Wherein, the two limiting members are respectively threadedly connected to the two screw rods.

[0021] Furthermore, the clamping mechanism further comprises:

[0022] Guide rail, the guide rail is installed on the bracket;

[0023] Two slides, the two slides are movably mounted on the guide rail along a first direction;

[0024] Two locking members, the two locking members are respectively installed on the two sliding seats;

[0025] The locking member is used to lock and fix the slide on the guide rail, and the two limiting members are respectively installed on the two slides.

[0026] Furthermore, the locking member is a latch;

[0027] The rails include:

[0028] A plurality of positioning holes are arranged on the guide rail at equal intervals along a first direction;

[0029] The locking piece is adapted to be plugged into the positioning hole.

[0030] Furthermore, the detection circuit includes an ammeter and a resistor connected in series.

[0031] Furthermore, the detection circuit also includes a voltmeter, which is connected in parallel with the positive and negative electrodes of the electrode assembly to be tested.

[0032] Furthermore, the rotating mechanism includes:

[0033] A rotating shaft is rotatably mounted on the fixing frame and connected to the bracket;

[0034] The third motor is installed on the fixing frame and is used to drive the rotating shaft to rotate.

[0035] Furthermore, the detection mechanism includes a first magnet and a second magnet, and the first magnet and the second magnet are arranged with opposite magnetic sides relative to each other, and an induced magnetic field is formed between the first magnet and the second magnet.

[0036] The beneficial effects of the utility model are:

[0037] The electrode assembly detection device uses two limiters to limit and fix the electrode assembly to be tested on the bracket, and then uses a rotating mechanism to drive the bracket to rotate to drive the electrode assembly to cut the induced magnetic field. The detection circuit detects whether an induced current is formed to determine whether there is an internal short circuit inside the electrode assembly. This is convenient and practical, and can prevent the produced electrode assemblies from short-circuiting during subsequent use, effectively improving the production quality of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural diagram of the utility model;

[0039] Figure 2 It is a structural diagram of the electrode assembly in the utility model;

[0040] Figure 3 This is a schematic diagram of the specific structure of Example 3 of the present utility model;

[0041] Figure 4 This is a schematic diagram of the specific structure of Example 4 of the present utility model;

[0042] Figure 5 This is a schematic diagram of the specific structure of Example 5 of the present utility model;

[0043] The marks in the figure are:

[0044] 1. Fixed frame; 2. Clamping mechanism; 21. Bracket; 22. Limiting member; 23. Guide member; 24. Bidirectional screw; 25. First motor; 26. Screw; 27. Second motor; 28. Guide rail; 29. Slide; 3. Rotating mechanism; 31. Rotating shaft; 32. Third motor; 4. Ammeter; 5. Resistor; 6. Voltmeter; 7. First magnet; 8. Second magnet; X, first direction. DETAILED DESCRIPTION

[0045] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of this application.

[0046] In the description of this application, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0047] Example 1:

[0048] This embodiment provides an electrode assembly detection device, including:

[0049] Fixed frame 1;

[0050] The clamping mechanism 2 includes a bracket 21 and two stoppers 22. The bracket 21 is rotatably mounted on the fixed frame 1. The two stoppers 22 are relatively movable along the first direction X on the bracket 21. A clamping area for fixing the electrode assembly to be tested is formed between the two stoppers 22.

[0051] The detection mechanism includes an induced magnetic field and a detection circuit. The clamping mechanism 2 is located in the induced magnetic field, and the detection circuit is electrically connected to the positive and negative electrodes of the electrode assembly to be tested;

[0052] The rotating mechanism 3 is mounted on the fixed frame 1 and is used to control the rotation of the bracket 21;

[0053] When the electrode assembly to be inspected rotates, the induced magnetic field is cut.

[0054] In this technical solution, an induced magnetic field is set in the fixing frame 1, and the formed electrode assembly is placed between the two limit members 22 and located in the induced magnetic field. Then, the two limit members 22 are controlled to move closer to each other to abut the electrode assembly. After the limit members 22 abut the electrode assembly, the limit members 22 are locked and kept stationary, so that the electrode assembly is clamped and fixed on the bracket 21 by the two limit members 22. Then, the rotating mechanism 3 controls the bracket 21 to rotate and drive the electrode assembly to rotate. The rotation of the electrode assembly cuts the induced magnetic field. During the process of the electrode assembly rotating and cutting the induced magnetic field, if the detection circuit detects the formation of an induced current, it means that there is a short circuit inside the electrode assembly; otherwise, it means that there is no internal short circuit inside the electrode assembly.

[0055] In summary, the electrode assembly detection device fixes the electrode assembly to be tested on the bracket 21 through two limiters 22, and then uses the rotating mechanism 3 to drive the bracket 21 to rotate and drive the electrode assembly to cut the induced magnetic field. The detection circuit detects whether an induced current is formed to determine whether there is an internal short circuit inside the electrode assembly. It is convenient and practical, and can prevent the produced electrode assembly from short-circuiting in subsequent use, effectively improving the production quality of the battery. It should be noted that the electrode assembly detection device in this application is not only applicable to internal short circuits caused by welding slag piercing the diaphragm, but also applicable to internal short circuits of electrode assemblies caused by other reasons.

[0056] Exemplarily, to form an induced magnetic field, the detection mechanism includes: a first magnet 7 and a second magnet 8, with the first magnet 7 and the second magnet 8 being arranged with their magnetically opposite sides facing each other, so that the induced magnetic field is formed between the first magnet 7 and the second magnet 8. In other embodiments, the induced magnetic field can also be formed by an induction coil.

[0057] Example 2:

[0058] This embodiment provides an electrode assembly detection device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0059] Furthermore, the clamping mechanism 2 further includes:

[0060] A guide member 23 is mounted on the bracket 21 , and two limiting members 22 are movably mounted on the guide member 23 along the first direction X;

[0061] The driving module is installed on the bracket 21 and is used to drive the two limiting members 22 to move along the first direction X to contact the electrode assembly to be tested.

[0062] In this technical solution, the guide member 23 can be a guide rod or a guide rail 28 structure, which makes the movement of the two limit members 22 in the first direction X smoother and more stable, prevents the limit members 22 from deflecting during movement, ensures that the limit members 22 accurately abut against the electrode assembly, and ensures that the electrode assembly is firmly clamped by the two limit members 22. The drive module can be an electric cylinder, a pneumatic cylinder, or a screw 26 module to drive the limit member 22 to move in the first direction X to abut against the electrode assembly to be tested, so that the electrode assembly to be tested is clamped and fixed.

[0063] Example 3:

[0064] This embodiment provides an electrode assembly detection device, which, in addition to the technical solution of any one of the above embodiments 1-2, also has the following technical features.

[0065] Furthermore, the driver module includes:

[0066] A bidirectional screw 24 is rotatably mounted on the bracket 21;

[0067] A first motor 25 , wherein a driving end of the first motor 25 is connected to the bidirectional screw 24 and is used to control the rotation of the bidirectional screw 24 ;

[0068] The two limiting members 22 are respectively threadedly connected to the two sections of the thread structure of the bidirectional screw 24 .

[0069] In this technical solution, if Figure 3 As shown, the two sections of the bidirectional screw 24 are threadedly connected to the two stoppers 22, respectively. The guide member 23 is a guide rod that passes through the two stoppers 22. The first motor 25 drives the bidirectional screw 24 to rotate, moving the two stoppers 22 toward or away from each other, thereby achieving the function of clamping the electrode assembly. This structural design effectively reduces energy consumption, lowers production costs, and improves economic benefits.

[0070] Example 4:

[0071] This embodiment provides an electrode assembly detection device, which, in addition to the technical solution of any one of the above embodiments 1-2, also has the following technical features.

[0072] Furthermore, the driving module includes:

[0073] Two screw rods 26 are coaxially mounted on the bracket 21;

[0074] Two second motors 27, the driving ends of the two second motors 27 are respectively connected to the two screw rods 26, and are respectively used to drive the two screw rods 26 to rotate;

[0075] The two limiting members 22 are respectively threadedly connected to the two screw rods 26 .

[0076] In this technical solution, if Figure 4 As shown, two screw rods 26 are respectively threadedly connected to the two limit members 22. The guide member 23 also serves as a guide rod. Two second motors 27 are used to drive and control the rotation of the two screw rods 26, driving the two limit members 22 toward or away from each other, thereby achieving the function of the two limit members 22 clamping and fixing the electrode assembly. Through this structural design, the two limit members 22 can move independently, effectively improving working flexibility and making it more convenient to use.

[0077] Example 5:

[0078] This embodiment provides an electrode assembly detection device, which, in addition to the technical solution in the above-mentioned embodiment 1, also has the following technical features.

[0079] Furthermore, the clamping mechanism 2 further includes:

[0080] Guide rail 28, guide rail 28 is installed on bracket 21;

[0081] Two slides 29 movably mounted on the guide rail 28 along a first direction X;

[0082] Two locking members, the two locking members are respectively installed on the two slide seats 29;

[0083] The locking member is used to lock and fix the slide 29 on the guide rail 28 , and the two limiting members 22 are respectively installed on the two slides 29 .

[0084] In this technical solution, if Figure 5 As shown, a guide rail 28 is mounted on the bracket 21. Two slides 29 that can move along the first direction X are provided on the guide rail 28. Two limiting members 22 are respectively mounted on the two slides 29. The slides 29 are provided with locking members that can lock the slides 29 to the guide rail 28. The limiting members 22 can be moved by manually controlling the movement of the slides 29. When the two limiting members 22 abut against the electrode assembly to clamp the electrode assembly, the locking members are used to fix the slides 29 in the corresponding position, thereby clamping the electrode assembly to be tested on the bracket 21. This structural design makes the operation of clamping and fixing the electrode assembly more convenient, and can also reduce the use of motors, reduce energy consumption, and reduce production costs.

[0085] Furthermore, the locking member is a latch; the guide rail 28 includes a plurality of positioning holes, which are arranged equidistantly on the guide rail 28 along the first direction X. With this structural design, after the two limiting members 22 abut against the electrode assembly to clamp the electrode assembly, the latch is inserted through the slide 29 and engaged with the corresponding positioning holes on the guide rail 28 to limit the movement of the slide 29, thereby locking the slide 29 on the guide rail 28. This is practical and convenient.

[0086] Example 6:

[0087] This embodiment provides an electrode assembly detection device, which, in addition to the technical solution in the above-mentioned embodiment 1, also has the following technical features.

[0088] Furthermore, the detection circuit includes an ammeter 4 and a resistor 5 connected in series.

[0089] In this technical solution, if an induced current is generated during the process of the electrode assembly rotating and cutting the induced magnetic field, the ammeter 4 can directly measure and display the current passing through the resistor 5, making it easier for the staff to observe and record. Furthermore, the detection circuit also includes a voltmeter 6, which is connected in parallel with the positive and negative poles of the electrode assembly to be tested. The voltmeter 6 can measure the induced voltage in the circuit. Through the voltmeter 6 and the ammeter 4, it can be more comprehensively understood whether the electrode assembly rotating and cutting the induced magnetic field generates an induced current, effectively improving the detection accuracy.

[0090] Example 7:

[0091] This embodiment provides an electrode assembly detection device, which, in addition to the technical solution in the above-mentioned embodiment 1, also has the following technical features.

[0092] Furthermore, the rotating mechanism 3 includes:

[0093] A rotating shaft 31 is rotatably mounted on the fixing frame 1 and connected to the bracket 21;

[0094] The third motor 32 is mounted on the fixing frame 1 and is used to drive the rotating shaft 31 to rotate.

[0095] In this technical solution, the third motor 32 is mounted on the fixed frame 1. The output shaft of the third motor 32 is connected to one end of the rotating shaft 31 via a coupling. The other end of the rotating shaft 31 is connected to the bracket 21. With this structural design, the third motor 32 drives the rotating shaft 31 to rotate, and the rotation of the rotating shaft 31 drives the bracket 21 to rotate, thereby enabling the electrode assembly to rotate and cut the induced magnetic field.

[0096] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. An electrode assembly detection device, characterized in that: include: Fixed frame (1); A clamping mechanism (2), the clamping mechanism (2) comprising a bracket (21) and two limiting members (22), the bracket (21) being rotatably mounted on the fixing frame (1), the two limiting members (22) being relatively movably mounted on the bracket (21) along a first direction X, and a clamping area for fixing the electrode assembly to be tested being formed between the two limiting members (22); A detection mechanism, the detection mechanism comprising an induced magnetic field and a detection circuit, the clamping mechanism (2) being located within the induced magnetic field, and the detection circuit being electrically connected to the positive and negative electrodes of the electrode assembly to be tested; A rotating mechanism (3), the rotating mechanism (3) being mounted on the fixed frame (1) and used for controlling the rotation of the bracket (21); When the electrode assembly to be inspected rotates, the induced magnetic field is cut.

2. The electrode assembly detection device according to claim 1, characterized in that: The clamping mechanism (2) further comprises: A guide member (23), the guide member (23) being mounted on the bracket (21), and the two limiting members (22) being movably mounted on the guide member (23) along a first direction X; A driving module is mounted on the bracket (21) and is used to drive the two limiting members (22) to move along a first direction X to contact the test electrode assembly.

3. The electrode assembly detection device according to claim 2, characterized in that: The driving module includes: a bidirectional screw (24), the bidirectional screw (24) being rotatably mounted on the bracket (21); a first motor (25), wherein a driving end of the first motor (25) is connected to the bidirectional screw (24) and is used to control the rotation of the bidirectional screw (24); The two limiting members (22) are respectively threadedly connected to the two sections of the thread structure of the bidirectional screw (24).

4. The electrode assembly detection device according to claim 2, characterized in that: The driving module includes: Two screw rods (26), the two screw rods (26) are coaxially mounted on the bracket (21); Two second motors (27), the driving ends of the two second motors (27) are respectively connected to the two screw rods (26), and are respectively used to drive the two screw rods (26) to rotate; The two limiting members (22) are respectively threadedly connected to the two screw rods (26).

5. The electrode assembly detection device according to claim 1, characterized in that: The clamping mechanism (2) further comprises: A guide rail (28), wherein the guide rail (28) is mounted on the bracket (21); Two slides (29), the two slides (29) being movably mounted on the guide rail (28) along a first direction X; Two locking members, the two locking members being respectively mounted on the two slide seats (29); The locking member is used to lock and fix the slide seat (29) on the guide rail (28), and the two limiting members (22) are respectively installed on the two slide seats (29).

6. The electrode assembly detection device according to claim 5, characterized in that: The locking member is a latch; The guide rail (28) comprises: A plurality of positioning holes, wherein the plurality of positioning holes are arranged equidistantly along a first direction X on the guide rail (28); Wherein, the locking piece is adapted to be plugged into the positioning hole.

7. The electrode assembly detection device according to claim 1, characterized in that: The detection circuit comprises an ammeter (4) and a resistor (5) connected in series.

8. The electrode assembly detection device according to claim 7, characterized in that: The detection circuit further comprises a voltmeter (6), and the voltmeter (6) is connected in parallel with the positive and negative electrodes of the electrode assembly to be tested.

9. The electrode assembly detection device according to claim 1, characterized in that: The rotating mechanism (3) comprises: A rotating shaft (31), the rotating shaft (31) is rotatably mounted on the fixing frame (1) and connected to the bracket (21); A third motor (32) is mounted on the fixing frame (1) and is used to drive the rotating shaft (31) to rotate.

10. The electrode assembly detection device according to claim 1, characterized in that: The detection mechanism comprises a first magnet (7) and a second magnet (8), wherein the first magnet (7) and the second magnet (8) are arranged on opposite sides of the magnetism, and the induced magnetic field is formed between the first magnet (7) and the second magnet (8).

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