Positioning tool and capacitor welding system

Abstract

The invention provides a positioning tool and a capacitor welding system, and relates to the technical field of auxiliary devices. The positioning tool comprises a positioning seat and a plurality of connecting columns; the lower end of the connecting column is provided with a positioning connecting part, and the positioning connecting part of the connecting column is used for being in positioning connection with a connecting matching part of a pole of a to-be-positioned electrode of the energy storage core assembly; the positioning seat is provided with a plurality of guide holes, the plurality of connecting columns are respectively inserted into different guide holes, and the connecting columns are configured to be matched with the guide holes so as to guide the positioning seat to move towards the pole along the length direction of the connecting columns; and when the positioning seat moves towards the pole, the connecting column is used for driving the pole to move through the movement of the lower end so as to adjust the relative position between the electrodes to be positioned. The terminal post which is originally positioned in a narrow space is led out through the connecting post, and then the relative position of the terminal post is positioned in a larger space by utilizing the guide hole of the guide seat; and the connecting column and the guide hole of the positioning seat can adopt higher processing precision, so that the reliability and the accuracy of pole positioning can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of auxiliary devices, in particular to a positioning tool and a capacitor welding system. BACKGROUND

[0002] An energy storage core subassembly (for example, a battery module, a capacitor module) generally includes a plurality of stacked core monomers and a plurality of electrodes, each electrode having a pole, and the plurality of poles collectively constitute an output terminal of the energy storage core subassembly. After the energy storage core subassembly is assembled, the relative positions of these poles require high accuracy, for example, in some scenarios, these poles need to be subsequently connected with external interfaces to form corresponding electrical energy transmission paths. Therefore, at present, in the production of the energy storage core subassembly, the relative positions of the plurality of poles are first positioned, the relative positions of the plurality of electrodes are then positioned, and then the plurality of electrodes are connected together with the conductive row of the energy storage core subassembly by welding or other means. However, the layout between the plurality of poles is generally compact, and the size of the pole is generally small, which is not conducive to the relative position positioning of the plurality of electrodes. SUMMARY

[0003] The present application aims to solve the problem of difficult relative position positioning of the electrodes to be positioned of the energy storage core subassembly in the related art to some extent.

[0004] To at least partially solve at least one aspect of the above problem, in a first aspect, the present application provides a positioning tool, which includes a positioning seat and a plurality of connecting columns; the lower end of the connecting column is provided with a positioning connecting part, and the positioning connecting part of the connecting column is used for positioning connection with the connecting matching part of the pole of the electrode to be positioned of the energy storage core subassembly; the positioning seat is provided with a plurality of guide holes, and a plurality of connecting columns are respectively inserted into different guide holes, and the connecting column is configured to cooperate with the guide hole to guide the movement of the positioning seat towards the pole in the length direction of the connecting column; when the positioning seat moves towards the pole, the connecting column is used to drive the movement of the pole through the movement of the lower end to adjust the relative positions between the electrodes to be positioned.

[0005] Optionally, one of the positioning connecting part and the connecting matching part is a connecting hole, and the other is a columnar structure, and the columnar structure is accommodated in the connecting hole.

[0006] Optionally, the positioning connecting part is a threaded stud provided at the lower end of the connecting column, and the connecting matching part is a threaded hole provided on the pole, and the axis of the threaded hole coincides with the axis of the pole.

[0007] Optionally, the connecting column is provided with a through hole extending in the length direction of the connecting column.

[0008] Optionally, a projection of the pole post on a set plane in a height direction of the pole post covers a first projection area, and a projection of the positioning seat on the set plane covers a second projection area; the first projection area has a portion outside the second projection area, and the set plane is a plane perpendicular to the height direction of the pole post.

[0009] Optionally, an upper end of a core sub-group of the energy storage core subassembly is provided with the electrode to be positioned, and a conductive row is provided on at least one side in a set horizontal direction; the electrode to be positioned includes a pole plate and the pole post connected to the pole plate, and a welding end of the pole plate in the set horizontal direction is used for welding with the conductive row; and the first projection area corresponding to the pole post is located outside the second projection area at least at an end close to the welding end in the set horizontal direction.

[0010] Optionally, the positioning seat is provided with an operation opening and constitutes a frame structure, a plurality of frame bodies of the frame structure are respectively provided with the guide hole, and the frame structure is connected with a plurality of pole posts of different energy storage core subassemblies through a plurality of connecting columns.

[0011] Optionally, a lower end of the positioning seat is provided with a receiving groove corresponding to and communicating with the guide hole, the receiving groove is used for accommodating the pole post, and a depth of the receiving groove is less than a length of the pole post.

[0012] Optionally, an end of the connecting column away from the positioning connecting part is provided with a guide surface structure. And / or, the connecting column is provided with a missing part at a position spaced from both ends of the connecting column. And / or, any electrode to be positioned has a plurality of pole posts, and at least two of the plurality of pole posts of the same electrode to be positioned are correspondingly connected with the connecting column.

[0013] In a second aspect, the present application provides a capacitor welding system, which comprises the positioning tool as described in the first aspect.

[0014] In the positioning tool and capacitor welding system of the present application, a positioning seat and a plurality of connecting columns are provided, the positioning connecting part at the lower end of the connecting column is connected and positioned with the connecting fitting part of the electrode column of the electrode to be positioned of the energy storage core subassembly, after the plurality of connecting columns are connected with the plurality of electrode columns respectively, the connecting column can form an external extension column of the electrode column, the plurality of connecting columns are respectively inserted into the plurality of guide holes of the positioning seat, the positioning seat can be pushed to move towards the electrode column, under the guidance of the plurality of guide holes pre-set on the positioning seat, the lower end of each connecting column gradually approaches the guide hole in the axial direction, the position of the electrode column changes with the position of the lower end of the connecting column, since the relative positions of the guide holes meet the corresponding requirements, all the electrode columns are finally adjusted to the expected positions corresponding to the guide holes one by one, so that the relative positions of the plurality of electrodes to be positioned arranged with the electrode columns are adjusted to the required relative positions, which is convenient for the positioning of the electrodes to be positioned and the welding of the electrodes to be positioned with other components. In addition, by the way that the connecting column forms the external extension column of the electrode column, the positioning operation of the electrode column of the electrode to be positioned can be carried out in a larger space range, avoiding the positioning operation in a very small space, which is more convenient to operate; and the connecting column is detachable, on the basis of ensuring the connection between the connecting column and the electrode column, the lower end of the connecting column and the guide hole of the positioning seat can adopt relatively high machining precision, so as to facilitate the positioning of the electrodes to be positioned and the welding of the electrodes to be positioned with other components. In general, the present application uses the "external extension column" to "lead out" the electrode column originally located in a narrow space, and then completes the positioning of the relative position of the electrode column in a larger space by using the guide hole on the guide seat; at the same time, the connecting column and the guide hole of the positioning seat can adopt high machining precision, which can effectively improve the reliability and accuracy of the positioning of the electrode column. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the positioning device in the embodiment of the present application for simultaneously positioning the electrode columns of a plurality of energy storage core subassemblies; Figure 2 It is an exploded structural schematic diagram of the structure shown; Figure 1 Figure 3 It is a structural schematic diagram of another view of the structure shown; Figure 1 It is a structural schematic diagram of another view of the structure shown; Figure 4 Figure 3 It is a sectional view of the A-A section in the embodiment of the present application; Figure 5 It is a structural schematic diagram of another view of the structure shown; Figure 1 Figure 6 It is a structural schematic diagram of the connecting column and the electrode column after being connected and the upper end of the connecting column being located in the guide hole of the positioning seat in the embodiment of the present application; ​​​Figure 7 Structure diagram of positioning seat provided with accommodating groove in the embodiment of the present application.

[0016] Legend of reference signs: 1-positioning seat; 11-guide hole; 12-accommodating groove; 13-operation port; 14-notch; 101-stand body; 2-connecting column; 21-positioning connecting part; 22-missing part; 23-through hole; 3-energy storage core subassembly; 31-electrode to be positioned; 31A-first electrode to be positioned; 31B-second electrode to be positioned; 311-plate; 312-pole; 3121-connecting matching part; 32-core monomer; 33-conductive row; 33A-left conductive row; 33B-right conductive row; 331-side connecting sheet; 332-folded edge; 333-connecting lug; 34-insulating plate; S1-first projection area; S2-second projection area. DETAILED DESCRIPTION

[0017] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0018] In the description of the present application, it should be noted that unless explicitly defined and limited, the terms “mounting”, “connection”, “connecting” should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. 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.

[0019] In the description of the present application, the description of the terms “embodiment”, “one embodiment”, “some embodiments”, “exemplarily” and “one embodiment” means that the specific features, structures, materials or characteristics described in connection with the embodiment or embodiment are included in at least one embodiment or embodiment of the present application. In the present application, the illustrative description of the above terms does not necessarily mean the same embodiment or embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or embodiments in a suitable manner.

[0020] The terms “first”, “second” and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first”, “second” can explicitly or implicitly include at least one of the features.

[0021] In the drawings, the X axis represents the front and rear positions, and the positive direction of the X axis (that is, the arrow direction of the X axis) represents the front side, and the negative direction of the X axis represents the rear side; the Y axis represents the horizontal direction, and is designated as the left and right positions, and the positive direction of the Y axis (that is, the arrow direction of the Y axis) represents the right side, and the negative direction of the Y axis represents the left side; the Z axis represents the vertical direction, that is, the up and down positions, and the positive direction of the Z axis (that is, the arrow direction of the Z axis) represents the up, and the negative direction of the Z axis represents the down; it should be noted that the above-mentioned meanings of the X axis, the Y axis and the Z axis 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 specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0022] As shown in Figures 1 to 3 and Figure 6 The present application provides a positioning tool, which comprises a positioning seat 1 and a plurality of connecting columns 2; the lower end of the connecting column 2 is provided with a positioning connecting part 21, and the positioning connecting part 21 of the connecting column 2 is used for positioning connection with the connecting matching part 3121 of the pole column 312 of the electrode to be positioned 31 of the energy storage core subassembly 3; the positioning seat 1 is provided with a plurality of guide holes 11, and the plurality of connecting columns 2 are respectively inserted into different guide holes 11, and the connecting column 2 is configured to cooperate with the guide hole 11 to guide the movement of the positioning seat 1 towards the pole column 312 along the length direction of the connecting column 2; when the positioning seat 1 moves towards the pole column 312, the connecting column 2 is used to drive the pole column 312 to move through the movement of the lower end, so as to adjust the relative positions between the electrodes to be positioned 31.

[0023] In the present specification, the core monomer 32 in the energy storage core subassembly 3 will be taken as an example of a capacitor monomer, and the energy storage core subassembly 3 comprises a core group, a conductive row 33 and an electrode to be positioned 31. A plurality of core monomers 32 are stacked to form a core group, for example Figure 1 and Figure 2 In the present specification, the core monomer 32 in the energy storage core subassembly 3 will be taken as an example of a capacitor monomer, and the energy storage core subassembly 3 comprises a core group, a conductive row 33 and an electrode to be positioned 31. A plurality of core monomers 32 are stacked to form a core group, for example

[0024] Specifically, the positioning connecting part 21 at the lower end of the connecting column 2 forms detachable positioning connection with the connecting matching part 3121 of the pole column 312. The connection can be thread, buckle, taper surface matching, or other mechanical connection forms that can be repeatedly disassembled, which is not limited and will be exemplarily described later.

[0025] In the positioning tool of the present application, the positioning seat 1 and the plurality of connecting columns 2 are provided, the positioning connecting part 21 at the lower end of the connecting column 2 is positioned and connected with the connecting matching part 3121 of the pole column 312 of the electrode 31 to be positioned of the energy storage core subassembly 3, after the plurality of connecting columns 2 are connected with the plurality of pole columns 312 respectively, the connecting column 2 can constitute an external extension column of the pole column 312, the plurality of connecting columns 2 are respectively inserted into the plurality of guide holes 11 of the positioning seat 1, and the positioning seat 1 can be pushed to move towards the pole column 312, under the guidance of the plurality of guide holes 11 pre-set on the positioning seat 1, the lower end of each connecting column 2 gradually approaches the guide hole 11 in the axial direction, and the position of the pole column 312 changes with the position of the lower end of the connecting column 2. Since the relative positions of the guide holes 11 meet the corresponding requirements, all the pole columns 312 are finally adjusted to the expected positions corresponding to the guide holes 11 one by one, so that the relative positions of the plurality of electrodes 31 to be positioned which are respectively arranged with the pole columns 312 are adjusted to the required relative positions, facilitating the operation after the positioning of the electrode 31 to be positioned, such as the welding operation of the electrode 31 to be positioned and other components. In addition, by the way that the connecting column 2 constitutes the external extension column of the pole column 312, the positioning operation of the pole column 312 of the electrode 31 to be positioned can be performed in a larger space range, avoiding the positioning operation in a very small space, which is more convenient to operate. Moreover, the connecting column 2 is detachable, on the basis of ensuring the connection between the connecting column 2 and the pole column 312, the lower end of the connecting column 2 and the guide hole 11 of the positioning seat 1 can adopt relatively high machining precision, thereby facilitating the plurality of pole columns 312 to obtain relatively high position positioning precision, ensuring the positioning reliability and accuracy of the electrode 31 to be positioned, and facilitating the operation after the positioning of the electrode 31 to be positioned. Overall, the present application "leads out" the pole column 312 originally located in a narrow space by the way of "external extension column", and then completes the positioning of the relative position of the pole column 312 in a larger space by using the guide hole 11 on the guide seat. At the same time, the connecting column 2 and the guide hole 11 of the positioning seat 1 can adopt high machining precision, which can effectively improve the reliability and accuracy of the positioning of the pole column 312.

[0026] Optionally, one of the positioning connecting part 21 and the connecting matching part 3121 is a connecting hole, and the other is a columnar structure, and the columnar structure is accommodated in the connecting hole.

[0027] If the positioning connecting part 21 is a connecting hole, the end of the pole column 312 can form the columnar structure, which is inserted into the connecting hole to realize the positioning connection of the two.

[0028] If the positioning connecting part 21 is a columnar structure, the columnar structure can be formed by using the lower end part of the connecting column 2, and the top end of the pole column 312 is provided with a connecting hole, and the columnar structure is inserted into the hole to realize the positioning connection of the two.

[0029] As shown in Figure 2 and Figure 4 , in a further alternative, the positioning connecting part 21 is a threaded stud provided at the lower end of the connecting column 2, and the connecting matching part 3121 is a threaded hole provided at the pole column 312, and the axis of the threaded hole coincides with the axis of the pole column 312.

[0030] Specifically, a threaded stud can be directly machined at the lower end (the end towards the pole column 312) of the connecting column 2 to form the positioning connecting part 21, and a threaded hole is concentrically formed along the axis of the upper end surface of the pole column 312, and the threaded hole is matched with the threaded stud in terms of threaded specifications, thereby forming the connecting matching part 3121.

[0031] When the positioning connection of the connecting column 2 and the pole column 312 is performed, the threaded stud can be screwed into the threaded hole along the axis of the pole column 312 to realize the rigid coaxial fixation of the connecting column 2 and the pole column 312. After the threaded stud is screwed, the connecting column 2 forms an “extension rod” coaxial with the pole column 312, which is conducive to improving the positioning accuracy of the guide hole 11 to the connecting column 2, thereby indirectly positioning the pole column 312. And the threaded hole is only machined along the axis at the original end surface of the pole column 312, without increasing the outer diameter of the pole column 312, and without affecting the connection of the pole column 312 with the external structure, etc., the structure is simple and practical.

[0032] As shown in Figure 4 , in a further alternative, the connecting column 2 is provided with a through hole 23 extending along the length direction of the connecting column 2.

[0033] Specifically, the through hole 23 is coaxially arranged with the connecting column 2, and the upper end opening is located at the top of the connecting column 2, and the lower end opening extends to the bottom of the threaded stud, so that the through hole 23 is in communication with the threaded hole.

[0034] In this optional solution, the through hole 23 can be used as a variety of functional channels. In some scenarios, the through hole 23 can be used as a detection / observation channel. For example, if debris or foreign matter falls into the threaded hole, the through hole 23 can be used as a detection / observation channel. For example, an elongated member can be inserted into the through hole 23 to check the depth of insertion. If the depth of insertion of the elongated member is consistent with the reasonable depth (the reasonable depth is usually the sum of the length of the connecting column 2 and the reserved depth of the threaded hole, and the reserved depth is the size of the part of the connecting hole that is not threadedly connected to the connecting column 2), it indicates that the connection of the connecting column 2 and the connecting hole is appropriate. If the depth of insertion of the elongated member is greater than the reasonable depth, it indicates that the thread of the threaded hole may be abnormal, causing the connecting column 2 to be difficult to screw in smoothly. If the depth of insertion of the elongated member is less than the reasonable depth, it indicates that debris or foreign matter may have fallen into the threaded hole. In some scenarios, the through hole 23 can form an air extraction channel for negative pressure adsorption of debris. In some scenarios, the through hole 23 can be connected to inert gas or cooling medium to prevent the pole column 312 from overheating and oxidizing during the welding process of the to-be-positioned electrode 31 and the conductive strip 33.

[0035] Reference Figure 5 In the above embodiments, optionally, the projection of the pole column 312 along its height direction on the set plane covers a first projection area S1, and the projection of the positioning seat 1 on the set plane covers a second projection area S2; the first projection area S1 has a part outside the second projection area S2, and the set plane is a plane perpendicular to the height direction of the pole column 312.

[0036] Specifically, the height direction of the pole column 312 corresponds to the Z-axis direction in the figure, and the set plane is a plane parallel to the XY plane, Figure 5 In this embodiment, the first projection area S1 is schematically circled by the thickest solid line, and the second projection area S2 is schematically circled by the second thickest solid line, Figure 5 In this embodiment, the second projection area S2 is a rectangular annular area.

[0037] That is, in one or more directions perpendicular to the height direction of the pole column 312, the pole column 312 partially exceeds the edge of the positioning seat 1 and is exposed to the positioning seat 1, so that the part of the pole column 312 blocked by the positioning seat 1 can be reduced, and more operation space can be left in one or more directions of the pole column 312. Under the premise of not weakening the positioning accuracy and guiding function, this embodiment provides an open space for the subsequent welding and other operations of the to-be-positioned electrode 31 where the pole column 312 is located, which facilitates the positioning of the to-be-positioned electrode 31 through the positioning seat 1, so as to realize the relative position positioning of the to-be-positioned electrode 31, and facilitates the welding work of the pole plate 311 of the to-be-positioned electrode 31 and the conductive strip 33.

[0038] For example, Figures 1 to 5As shown, in a further optional solution, the upper end of the core sub-group of the energy storage core subassembly 3 is provided with a to-be-positioned electrode 31, and at least one side of the to-be-positioned electrode 31 in the set horizontal direction is provided with a conductive row 33. The to-be-positioned electrode 31 includes a pole plate 311 and a pole column 312 connected with the pole plate 311. The pole plate 311 at the to-be-welded end in the set horizontal direction is used for welding with the conductive row 33. The first projection area S1 corresponding to the pole column 312 is located outside the second projection area S2 at least at one end close to the to-be-welded end in the set horizontal direction.

[0039] As shown in Figure 1 and Figure 2 Exemplarily, in each energy storage core subassembly 3, the number of conductive rows 33 and to-be-positioned electrodes 31 is two. The set horizontal direction is the left-right direction in the figure. The two conductive rows 33 are respectively a left conductive row 33A and a right conductive row 33B. Each conductive row 33 has an integrally formed side connecting piece 331 and a folded edge 332. The side connecting piece 331 is provided with a via hole, and a connecting lug 333 is arranged in the via hole. The side connecting piece 331 is connected with one end of each core monomer 32 through a plurality of connecting lugs 333. The upper end of the core sub-group is provided with an insulating plate 34. The folded edge 332 of the left conductive row 33A is located at the upper left end position of the insulating plate 34. The folded edge 332 of the right conductive row 33B is located at the upper right end position of the insulating plate 34.

[0040] The two to-be-positioned electrodes 31 are respectively a first to-be-positioned electrode 31A and a second to-be-positioned electrode 31B. Each to-be-positioned electrode 31 includes a pole plate 311 and a pole column 312 fixedly connected with the pole plate 311, for example, welded. In the figure, each pole plate 311 is connected with two pole columns 312. The projections of the two pole plates 311 on the set plane do not coincide with each other, so as to ensure the insulation between the pole plates 311.

[0041] The pole plate 311 of the first to-be-positioned electrode 31A is located between the folded edge 332 of the left conductive row 33A and the insulating plate 34. The left end of the pole plate 311 of the first to-be-positioned electrode 31A is a to-be-welded end. After the first to-be-positioned electrode 31A is positioned, the to-be-welded end is used for welding with the folded edge 332 of the left conductive row 33A. In this case, the left end of the pole column 312 of the first to-be-positioned electrode 31A is exposed, which can provide more operation space for welding the left end of the pole plate 311 of the first to-be-positioned electrode 31A with the folded edge 332 of the left conductive row 33A, and facilitate the welding operation.

[0042] The pole plate 311 of the second electrode to be positioned 31B is located between the folded edge 332 of the right conductive row 33B and the insulating plate 34, and the right end of the pole plate 311 of the second electrode to be positioned 31B is a welding end, which is used for welding with the folded edge 332 of the right conductive row 33B after the second electrode to be positioned 31B is positioned. In this case, the right end of the pole column 312 of the second electrode to be positioned 31B is exposed, which can provide more operation space for welding the right end of the pole plate 311 of the second electrode to be positioned 31B with the folded edge 332 of the right conductive row 33B, and facilitate the welding operation.

[0043] In some scenarios, the energy storage core subassembly 3 is used for a dry shell-less capacitor. After the energy storage core subassembly 3 is assembled, the above-mentioned components are used as inserts for injection molding, and the dry shell-less capacitor can be obtained.

[0044] Specifically, after the welding of the conductive row 33 and each core subunit 32 is implemented, the positioning of the connecting column 2 and the connecting fitting part 3121 of the pole column 312 of the electrode to be positioned 31 is performed, the connection of the connecting column 2 and the guide hole 11 of the positioning seat 1 is performed, and after the relative position positioning of the electrodes to be positioned 31 is implemented, the welding of the pole plate 311 of the electrode to be positioned 31 and the folded edge 332 of the corresponding side connecting piece 331 can be performed; finally, the positioning seat 1 is removed (the connecting column 2 can be removed, or can not be removed, and when not removed, can also be used for positioning with the end plate of the injection mold), and the assembled energy storage core subassembly 3 is connected with the injection mold (the injection mold has an end plate, and the end plate has a hole position matched with the pole column 312). The scheme of the present application can realize better relative position positioning and axial compression of each pole column 312, which is beneficial to ensuring the positioning accuracy of the hole position of the end plate of the injection mold and the pole column 312, and ensuring the adhesion of the end plate in the hole position and the energy storage core subassembly 3, avoiding the influence of low matching precision on the sealing performance of the matching part of the injection mold and the energy storage core subassembly 3 after the energy storage core subassembly 3 is loaded into the injection mold, avoiding the leakage of epoxy resin liquid from the sealing gap due to poor sealing, and thus affecting the product quality of the dry shell-less capacitor. The present application is beneficial to improving the product yield of the dry shell-less capacitor. In addition, the scheme of the present application does not need to repeatedly adjust the position of the pole column 312 for positioning, can reduce the positioning difficulty of the pole column 312, can reduce the need for the end plate of the positioning seat 1 and the injection mold to directly contact the pole column 312 in the positioning process of the pole column 312, and can reduce the possibility of scratches and other appearance defects on the surface of the pole column 312 due to friction.

[0045] As shown in FIG. 1, Figure 6 As shown in FIG. 1,

[0046] As shown in Figure 6 , it shows that the number of energy storage core subassembly 3 is two, and the frame structure is rectangular frame, but it is not rectangular here, and it will not be described in detail here.

[0047] In this case, the positioning of the electrodes 31 of the plurality of energy storage core subassemblies 3 can be performed by one positioning seat 1 cooperating with a plurality of connecting columns 2. During the positioning operation or subsequent welding, part of the operation can be performed through the operation port 13, the structure is simple, and the practicability is strong.

[0048] As shown in Figure 4 , in the above embodiment, the lower end of the positioning seat 1 is provided with a receiving groove 12 corresponding to and communicating with the guide hole 11, and the receiving groove 12 is used to accommodate the pole column 312. The depth of the receiving groove 12 is less than the length of the pole column 312.

[0049] Specifically, the slot shape of the receiving groove 12 matches the outer contour of the pole column 312, and when the pole column 312 is accommodated in the receiving groove 12, the groove bottom of the receiving groove 12 can abut against the upper end of the pole column 312. Here, the matching precision of the receiving groove 12 and the pole column 312 is usually lower than the matching precision of the lower end position of the connecting column 2 and the guide hole 11.

[0050] It should be noted that in this case, if the first projection area S1 has a part located outside the second projection area S2, the slot wall of the receiving groove 12 is not complete in the circumferential direction and forms a gap 14 (marked in Figure 7 ). This gap 14 can be used to observe the condition of the pole column 312 inside the receiving groove 12.

[0051] In this way, during the subsequent welding operation, if the electrode 31 to be positioned has a tendency to be offset, the receiving groove 12 can enhance the positioning effect of the positioning seat 1 on the pole column 312, and avoid that the connecting column 2 is affected by excessive radial force, thereby affecting the service life.

[0052] In the above embodiment, optionally, the end of the connecting column 2 away from the positioning connecting part 21 is provided with a guide surface structure.

[0053] For example, the upper end of the connecting column 2 is provided as a conical surface, which facilitates the extension of the connecting column 2 into the guide hole 11.

[0054] In the above embodiment, optionally, the connecting column 2 is provided with a missing part 22 at a position spaced from both ends thereof. In this way, the connecting column 2 can be lightened, and the precision requirement for the middle part of the connecting column 2 can be reduced. Even if there is a small degree of deformation in the middle part of the connecting column 2 after a long time, it can still smoothly pass through the guide hole 11, meeting the guiding requirement.

[0055] In the above embodiment, the pole plate 311 of any electrode 31 to be positioned is connected with a plurality of pole posts 312.

[0056] In this case, the pole plate 311 of any electrode 31 to be positioned is connected with a plurality of pole posts 312, and at least two of the plurality of pole posts 312 of the same electrode 31 to be positioned are connected with the connecting post 2 correspondingly. In this way, by connecting the plurality of connecting posts 2 with the same electrode 31 to be positioned, the stress of a single connecting post 2 is reduced, the stress condition of a single connecting post 2 is improved, and the service life of the connecting post 2 is prolonged.

[0057] In the use of the positioning tool, in some scenarios, the connecting post 2 can be connected with the corresponding pole post 312 first, then the pole post 312 is connected with the positioning seat 1, and then the positioning seat 1 is pushed to the core group. In other scenarios, the connecting post 2 can be pre-installed in the guide hole 11 of the positioning seat 1, and the axial part connected at the upper end is used to limit the falling of the connecting post 2, and then the connecting post 2 is connected with the positioning seat 1.

[0058] The embodiment of the present application also provides a capacitor welding system, which comprises the positioning tool of the above embodiment.

[0059] After the plurality of pole posts 312 are positioned by the positioning tool, the welding operation of the pole plate 311 and the conductive bar 33 can be performed.

[0060] Although the present application is disclosed as above, the protection scope of the present application is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and these changes and modifications shall fall within the protection scope of the present application.

Claims

1. A positioning tooling, characterized in that, The positioning fixture includes a positioning seat (1) and multiple connecting posts (2); the lower end of the connecting post (2) is provided with a positioning connection part (21), and the positioning connection part (21) of the connecting post (2) is used to position and connect with the connection mating part (3121) of the pole post (312) of the electrode (31) to be positioned in the energy storage core assembly (3); the positioning seat (1) is provided with multiple guide holes (11), and multiple connecting posts (2) are respectively inserted into different guide holes (11). The connecting post (2) is configured to cooperate with the guide hole (11) to guide the positioning seat (1) to move toward the pole post (312) along the length direction of the connecting post (2); when the positioning seat (1) moves toward the pole post (312), the connecting post (2) is used to drive the pole post (312) to move through the movement of the lower end, so as to adjust the relative position between the electrodes (31) to be positioned.

2. The positioning fixture as described in claim 1, characterized in that, One of the positioning connection part (21) and the connection mating part (3121) is a connection hole, and the other is a columnar structure, with the columnar structure housed in the connection hole.

3. The positioning fixture as described in claim 2, characterized in that, The positioning connection part (21) is a stud located at the lower end of the connecting post (2), and the connection mating part (3121) is a threaded hole located on the pole post (312), with the axis of the threaded hole coinciding with the axis of the pole post (312).

4. The positioning fixture as described in claim 3, characterized in that, The connecting post (2) is provided with a through hole (23) extending along the length direction of the connecting post (2).

5. The positioning fixture as described in any one of claims 1 to 4, characterized in that, The area covered by the projection of the pole post (312) onto the setting surface along its height direction is the first projection area (S1), and the area covered by the projection of the positioning seat (1) onto the setting surface is the second projection area (S2); the first projection area (S1) has a portion located outside the second projection area (S2), and the setting surface is a plane perpendicular to the height direction of the pole post (312).

6. The positioning fixture as described in claim 5, characterized in that, The upper end of the core assembly of the energy storage core component (3) is provided with the electrode to be positioned (31), and a conductive bus (33) is provided on at least one side in a set horizontal direction. The electrode to be positioned (31) includes an electrode plate (311) and a pole post (312) connected to the electrode plate (311). The electrode plate (311) is used to weld to the conductive bus (33) at the end to be welded in the set horizontal direction. The first projection area (S1) corresponding to the pole post (312) is located outside the second projection area (S2) at least one end of the pole post (312) in the set horizontal direction that is close to the end to be welded.

7. The positioning fixture as described in any one of claims 1 to 4, characterized in that, The positioning seat (1) is provided with an operation port (13) and forms a frame structure. The multiple frames (101) of the frame structure are respectively provided with guide holes (11). The frame structure is connected to multiple poles (312) of different energy storage core components (3) through multiple connecting columns (2).

8. The positioning fixture as described in any one of claims 1 to 4, characterized in that, The lower end of the positioning seat (1) is provided with a receiving groove (12) corresponding to and communicating with the guide hole (11). The receiving groove (12) is used to receive the pole post (312). The depth of the receiving groove (12) is less than the length of the pole post (312).

9. The positioning fixture as described in any one of claims 1 to 4, characterized in that, The end of the connecting column (2) away from the positioning connecting part (21) is provided with a guide surface structure; And / or, the connecting post (2) is provided with a missing part (22) at a position spaced apart from its two ends; And / or, any of the electrodes to be positioned (31) has a plurality of the pole posts (312), and at least two of the plurality of pole posts (312) of the same electrode to be positioned (31) are connected to the connecting post (2).

10. A capacitor welding system, characterized in that, Includes the positioning fixture as described in any one of claims 1 to 9.

Images