Capacitor encapsulation positioning device

Abstract

A capacitor encapsulation positioning device comprises a base, a positioning seat and a plurality of supporting seats, the positioning seat and the supporting seats are arranged on the base, and the base is used for supporting a capacitor and the positioning device; the upper end of the positioning seat is provided with a plurality of positioning grooves used for placing the connecting terminals, and positioning columns are arranged in the positioning grooves and used for penetrating through through holes in the connecting terminals to position the connecting terminals in the horizontal direction; a positioning piece is arranged on the supporting base and used for supporting, positioning and installing the steel sleeve in the vertical direction and / or the horizontal direction. According to the invention, the positioning accuracy of the capacitor is ensured through multi-point positioning, the overall assembly accuracy of the shell and the confluence busbar is ensured through multi-point positioning of the confluence busbar, and the positioning precision is improved to adapt to the capacitor in a higher power density grouping mode.

Description

Technical Field

[0001] The present application relates to the technical field of capacitor potting, and in particular to a capacitor potting positioning device. Background Art

[0002] With the rapid development of new energy vehicles, electronic control components, as core components of new energy vehicles, are becoming increasingly integrated. Simultaneously, safety requirements for key components, especially power capacitors, are becoming increasingly stringent. High-power film capacitors are a type of capacitor in which a thin layer of metal is vacuum-deposited onto a plastic film to form electrodes. The electrodes are then overlapped with the plastic film and wound together to form a capacitor core. The capacitor cores are then connected in series or parallel via busbars, depending on actual needs. Epoxy resin or other encapsulating materials are then injected into a sealed container to protect and secure the internal components. For capacitors with multiple electrodes, direct potting can easily cause the electrodes to shift, resulting in poor dimensional appearance and other issues. Therefore, potting tooling is required to assist with potting.

[0003] The existing capacitor includes a shell, a busbar, a cell assembly, a heat dissipation fin, a mounting steel sleeve and multiple connecting terminals. The cell assembly is arranged in the shell, one end of the connecting terminal is connected to the cell assembly inside the shell through the busbar, and the other end is exposed to the shell. The heat dissipation fins are connected to the connecting terminals and the cell assembly for heat dissipation, and the mounting steel sleeve is arranged on the outside of the shell to achieve positioning.

[0004] In view of the current development of grouping technology in the electronic control industry, in order to pursue higher power density, to adapt to the development needs of higher power density, and to ensure that the busbar has higher assembly accuracy and better heat dissipation effect, higher requirements are placed on the assembly accuracy of the potting tooling. However, the traditional capacitor potting positioning device has large processing accuracy and deformation, which cannot meet the current development needs of higher power density grouping methods. Utility Model Content

[0005] The present application provides a capacitor potting positioning device for improving positioning accuracy to accommodate capacitors in a grouping manner with higher power density.

[0006] According to one aspect of the present application, an embodiment provides a capacitor potting and positioning device, comprising a base, a positioning seat and a plurality of supporting seats provided on the base, wherein the base is used to support the capacitor and the positioning device;

[0007] The upper end of the positioning seat has a plurality of positioning grooves for placing the connecting terminals, and the positioning grooves are provided with positioning posts, and the positioning posts are used to pass through the through holes on the connecting terminals to position the connecting terminals in the horizontal direction;

[0008] The support seat is provided with a positioning piece, and the positioning piece is used to support and position the steel sleeve in the vertical direction and / or horizontal direction.

[0009] In another embodiment, a protruding partition is provided between two adjacent positioning grooves, and the two adjacent partitions form the positioning groove to position the connecting terminal in a horizontal direction.

[0010] In another embodiment, a holding portion is provided above the positioning seat. The holding portion is detachably mounted on the upper end of the positioning seat. The holding portion is used to confine the connecting terminal within the positioning groove to position the connecting terminal in a vertical direction.

[0011] In another embodiment, the pressing portion is arranged corresponding to the distribution of multiple connecting terminals, the pressing portion is provided with a locking portion, and the positioning seat is provided with a connecting portion. The pressing portion is detachably installed on the positioning seat through the cooperation of the locking portion and the connecting portion.

[0012] In another embodiment, the positioning member includes a positioning shaft, and the positioning shaft is used to be inserted into the mounting steel sleeve to position the housing.

[0013] In another embodiment, the installation axis of the installation steel sleeve is vertical, the support seat is used to support the lower end of the installation steel sleeve, and the positioning shaft is set as a vertical shaft and is used to insert the installation steel sleeve to position the shell.

[0014] In another embodiment, the positioning shaft is configured as a stepped shaft, and the diameter of the positioning shaft gradually decreases from one end to the other end of the support seat.

[0015] In another embodiment, the installation axis of the installation steel sleeve is horizontal, the positioning axis is set as a horizontal axis and is used to insert the installation steel sleeve, the support seat is provided with a mounting hole for the positioning axis to slide along the axis direction, and limiting parts are provided at both ends of the positioning axis, and the limiting parts are used to limit the installation steel sleeve from being separated from the positioning axis to position the shell.

[0016] In another embodiment, an elastic portion is provided on the positioning shaft, and the elastic portion is provided on the positioning shaft and is used to drive the positioning shaft to slide along the axial direction to achieve automatic clamping of the installed steel sleeve.

[0017] In another embodiment, a pressing plate is further provided on the base. The plane where the pressing plate is located is vertically arranged and is used to press the heat dissipation fins of the capacitor to position the heat dissipation fins.

[0018] According to the capacitor potting positioning device of the above embodiment, the connecting terminal is positioned by the positioning groove, the through hole on the connecting terminal is positioned by the positioning column, and the busbar is limited by multiple holes to ensure the accuracy of the position and flatness of the finished capacitor product, thereby reducing the risk of electrical connection and stress caused by inconsistent busbar planes. The higher the flatness, the more accurate the position, the better the heat dissipation effect, and the better the overcurrent effect of the electrical connection. For the pre-potting positioning of high-power capacitors, it is ensured that after the potting colloid is solidified, when it is disassembled, the position and flatness of the high-power capacitors meet the customer's high-precision positioning requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the product structure of a high-power capacitor;

[0020] Figure 2 An assembly diagram of a capacitor potting and positioning device in one embodiment;

[0021] Figure 3 An exploded schematic diagram of a capacitor potting and positioning device in one embodiment;

[0022] Figure 4 for Figure 2 Schematic diagram of explosion along the vertical direction;

[0023] Figure 5 for Figure 3 Enlarged view of part A;

[0024] Figure 6 for Figure 3 Magnified view of part B.

[0025] Figure numerals: 1. capacitor; 11. housing; 12. busbar; 13. heat sink; 14. mounting steel sleeve; 15. connecting terminal; 16. through hole; 2. base; 3. positioning seat; 31. positioning groove; 32. positioning column; 33. partition; 34. holding portion; 341. pressure strip; 35. connecting portion; 4. support seat; 41. positioning member; 411. positioning axis; 4111. vertical axis; 4112. horizontal axis; 412. limiting ring; 413. retaining ring; 414. plastic screw; 415. elastic portion; 42. limiting hole; 5. pressure plate. DETAILED DESCRIPTION

[0026] The present application is further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail. They can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0027] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various implementations, and the operational steps involved in each embodiment may be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a particular embodiment and do not imply a required composition and / or sequence.

[0028] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0029] For capacitors with multiple electrodes 1, potting positioning tooling is required to assist in potting to reduce problems such as poor appearance and size caused by electrode deviation; please refer to Figure 1 An existing high-power capacitor 1 includes a housing 11, a busbar 12, a cell assembly, a heat dissipation fin 13, a mounting steel sleeve 14, and a plurality of connection terminals 15 (not less than 6). The cell assembly is arranged in the housing 11. One end of the connection terminal 15 is connected to the cell assembly inside the housing 11 through the busbar 12, and the other end is exposed from the housing 11. The heat dissipation fin 13 is connected to the connection terminal 15 and the cell assembly for heat dissipation. The mounting steel sleeve 14 is arranged on the outside of the housing 11 for positioning. A temperature measuring component and a potting resin formed after potting are also provided in the housing 11.

[0030] For the above-mentioned higher power density capacitor 1, in order to ensure that the busbar 12 has higher assembly accuracy and better heat dissipation effect, higher requirements are placed on the assembly accuracy of the potting tooling. Traditional capacitor potting positioning devices generally use relatively cheap aluminum alloy materials with a processing accuracy of about ±0.1mm. Their processing accuracy and deformation are large, and cannot meet the current development needs of higher power density grouping methods.

[0031] The present application provides a capacitor potting positioning device, which ensures the accuracy of the positioning of the capacitor 1 through multi-point positioning, and ensures the accuracy of the overall assembly of the shell 11 and the busbar 12 through multi-point positioning of the busbar 12, and improves the positioning accuracy to adapt to capacitors 1 with higher power density grouping.

[0032] Please refer to Figure 2 and Figure 3 In one embodiment, a capacitor potting and positioning device is provided, including a base 2, a positioning seat 3 and a plurality of support seats 4 arranged on the base 2, the base 2 is used to support the capacitor 1 and the positioning device; the upper end of the positioning seat 3 has a plurality of positioning grooves 31 for placing the connecting terminals 15, and the positioning grooves 31 are provided with positioning columns 32, and the positioning columns 32 are used to pass through the through holes 16 on the connecting terminals 15 to position the connecting terminals 15 in the horizontal direction; the support seat 4 is provided with a positioning member 41, and the positioning member 41 is used to support and position the installation steel sleeve 14 in the vertical direction and / or horizontal direction.

[0033] In the examples of this application, please refer to Figure 2 and Figure 3 The positioning groove 31 is used to position the connecting terminal 15 of the busbar 12, thereby positioning the busbar 12 as a whole; the positioning column 32 is used to position each connecting terminal 15 to ensure the accuracy of the spacing between multiple connecting terminals 15; the mounting steel sleeve 14 is set on the shell 11, and the supporting seat 4 and the corresponding positioning piece 41 are used to position the mounting steel sleeve 14, further positioning the capacitor 1 shell 11, thereby ensuring the assembly accuracy of the capacitor 1 during the potting process.

[0034] According to the capacitor potting positioning device of the above embodiment, the position and flatness of the finished capacitor 1 are ensured to be accurate through multi-point and multi-hole limiting, reducing the risk of electrical connection and stress caused by inconsistent planes of the busbar 12. The higher the flatness, the more accurate the position, the better the heat dissipation effect, and the better the overcurrent effect of the electrical connection. For the pre-potting positioning of the high-power capacitor 1, it is ensured that after the potting colloid is solidified, when it is disassembled, the position and flatness of the high-power capacitor 1 meet the customer's high-precision positioning requirements.

[0035] For further information, please refer to Figure 2 and Figure 3 There is a raised partition 33 between two adjacent positioning grooves 31, that is, the two adjacent partitions 33 form a positioning groove 31, which restricts the connecting terminal 15 between the two adjacent partitions 33, thereby positioning the connecting terminal 15 in the horizontal direction.

[0036] Please refer to Figure 2 and Figure 3A holding portion 34 is provided above the positioning seat 3. The holding portion 34 is arranged corresponding to the distribution of the multiple connecting terminals 15. The holding portion 34 is detachably mounted on the upper end of the positioning seat 3. The holding portion 34 is used to confine the connecting terminals 15 within the positioning groove 31, thereby positioning the connecting terminals 15 in the vertical direction. The height of the partition 33 is set according to the thickness of the connecting terminals 15 to prevent vertical shaking caused by the gap between the connecting terminals 15 and the holding portion 34. A groove is also provided on the holding portion 34 corresponding to the position of the positioning column 32.

[0037] Please refer to Figure 3 According to the structure of the corresponding capacitor 1, the positioning seats 3 in the embodiment of the present application are provided at two locations and are respectively distributed on both sides of the base 2. The capacitor 1 is arranged between the two positioning seats 3. The connecting terminals 15 extending on both sides are directly mounted on the upper end of the positioning seats 3 and are positioned by the positioning posts 32.

[0038] Please refer to Figure 3 and Figure 4 The pressing portion 34 is provided with a locking portion, and the positioning seat 3 is provided with a connecting portion 35. The pressing portion 34 is detachably mounted on the positioning seat 3 through the cooperation between the locking portion and the connecting portion 35; the connecting terminals 15 on either side are distributed along a straight line, and the pressing portion 34 is correspondingly provided with a pressure strip 341, and the locking portion adopts a screw, and the number of screws is evenly distributed according to the length of the pressure strip 341. The connecting portion 35 is provided as a threaded hole opened on the partition 33, and the pressing portion 34 is provided with a stepped hole for the screw to pass through. The pressing portion 34 is pressed above the connecting terminal 15 by the cooperation and locking of the screw and the threaded hole.

[0039] Please refer to Figure 3 and Figure 4 The positioning member 41 includes a positioning shaft 411 , which is used to be inserted into the mounting steel sleeve 14 , and the housing 11 is positioned by the cooperation between the positioning shaft 411 and the mounting steel sleeve 14 .

[0040] In one embodiment, please refer to Figure 3 、 Figure 4 and Figure 5 The installation axis of the steel sleeve 14 is set vertically. The support base 4 is used to support the lower end of the steel sleeve 14. The positioning shaft 411 is set as a vertical shaft 4111 and is used to insert the steel sleeve 14 to position the shell 11 and prevent deformation of the shell 11. The vertical shaft 4111 is set as a stepped shaft, and the diameter of the vertical shaft 4111 gradually decreases from one end of the support base 4 to the other end. The front end of the vertical shaft 4111 is small to facilitate insertion into the installation steel sleeve 14 for guidance and positioning. The rear end is set to a shaft diameter corresponding to the inner diameter of the steel sleeve 14 to reduce shaking of the shell 11.

[0041] In another embodiment, please refer to Figure 3 、 Figure 4 and Figure 6The installation axis of the steel sleeve 14 is set horizontally, the positioning axis 411 is set as the horizontal axis 4112 and is used to insert the installation steel sleeve 14, and the support seat 4 is provided with a mounting hole for the horizontal axis 4112 to slide along the axial direction. Limiting parts 52 are provided at both ends of the horizontal axis 4112. The limiting parts 52 are used to limit the installation steel sleeve 14 from disengaging from the positioning axis 411 to position the outer shell 11 and prevent the outer shell 11 from deformation; an elastic part 415 is provided on the horizontal axis 4112, and the elastic part 415 is provided on the horizontal axis 4112, and is used to drive the horizontal axis 4112 to slide along the axial direction to realize automatic clamping of the installation steel sleeve 14.

[0042] For details, please refer to Figure 3 、 Figure 4 and Figure 6 The limiting part 52 includes a limiting ring 412 and a plastic screw 414. The plastic screw 414 is threadedly installed at one end of the positioning shaft 411, and the limiting ring 412 is fixed to the other end of the positioning shaft 411. A retaining ring 413 is fixed to the side of the support seat 4 close to the limiting ring 412; the elastic part 415 adopts a spring, and the spring sleeve is arranged on the horizontal shaft 4112 and is arranged between the limiting ring 412 and the support seat 4. One end of the spring is connected to the limiting ring 412, and the other end is connected to the retaining ring 413 corresponding to the support seat 4; the compression of the spring can drive the positioning shaft 411 to move toward the side of the limiting ring 412, reducing the gap between the plastic screw 414 and the support seat 4, thereby clamping and positioning the steel sleeve 14. When the installation axis of the steel sleeve 14 is horizontal, the corresponding positioning part 41 is set as a whole similar to an elastic positioning pin. After the horizontal axis 4112 passes through the installation steel sleeve 14, the plastic screw 414 is tightened, and the elastic part 415 is used to accurately lock and position the shell 11, which can be accurately positioned and easy to disassemble, thereby improving production efficiency.

[0043] In order to limit the circumferential rotation of the horizontal shaft 4112 and facilitate the disassembly and assembly of the plastic screw 414, please refer to Figure 6 A limiting hole 42 is opened on the side of the support seat 4 and passes through the mounting hole. The axis of the limiting hole 42 is perpendicular to the mounting hole. A guide groove corresponding to the position of the limiting hole 42 is opened on the horizontal shaft 4112. A guide pin that can be inserted into the guide groove is set in the limiting hole 42 to limit the circumferential rotation of the horizontal shaft 4112, so that the horizontal shaft 4112 only has the freedom to slide along the axial direction, thereby ensuring the stable positioning of the positioning member 41 on the mounting steel sleeve 14.

[0044] In the examples of this application, please refer to Figure 3 and Figure 4The capacitor 1 has two types of mounting steel sleeves 14: one with a vertical axis and one with a horizontal axis. Two sets of vertical mounting steel sleeves 14 are provided and are symmetrically arranged about the housing 11. The corresponding support bases 4 are configured as cylindrical structures. The vertical axis 4111 is integrally formed with the corresponding support base 4 to ensure positioning accuracy. Two sets of horizontal mounting steel sleeves 14 are also provided and symmetrically arranged about the housing 11. The corresponding support bases 4 are configured as square columns to facilitate the creation of horizontal mounting holes and the installation of the horizontal axis 4112. Four sets of mounting steel sleeves 14 are located near the four corners of the capacitor 1.

[0045] In other embodiments, different capacitors 1 have different mounting steel sleeves 14, and different positioning member 41 structures are set according to the mounting steel sleeves 14 with different installation directions. When the axis of the mounting steel sleeve 14 is inclined relative to the horizontal or vertical plane, an inclined positioning axis 411 can also be set according to the degree of inclination to position and support the mounting steel sleeve 14.

[0046] In another embodiment, please refer to Figure 3 and Figure 4 A pressing plate 5 is also provided on the base 2. The plane where the pressing plate 5 is located is vertically arranged and is used to press the heat dissipating fins 13 of the capacitor 1 to position the heat dissipating fins 13 and effectively limit the heat dissipating fins 13 to ensure its manufacturing accuracy, meet the customer's high-precision compression ratio control, and improve the heat dissipation effect of the high-power capacitor 1.

[0047] In the examples of this application, please refer to Figure 3 and Figure 4 The base 2 is opened to reduce the weight of the device. The base 2 and the positioning seat 3 are integrated, and positioning holes are opened on the base 2 corresponding to the pressure plate 5 and the support seat 4. The pressure plate 5 and the support seat 4 are locked on the base 2 by screws. When in use, splicing is performed first, and then the key positioning structures such as the positioning holes are integrated to reduce materials and reduce costs without affecting the overall processing accuracy. The overall material of the positioning device is mold steel, which can control the processing accuracy to about ±0.02mm, improve the manufacturing accuracy of the assembly jig, and reduce the manufacturing tolerance caused by assembly.

[0048] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art of the present invention can make some simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. A capacitor potting and positioning device, characterized in that: It comprises a base (2), a positioning seat (3) and a plurality of supporting seats (4) arranged on the base (2), wherein the base (2) is used to support the capacitor (1) and the positioning device; The upper end of the positioning seat (3) has a plurality of positioning grooves (31) for placing the connecting terminals (15), and positioning columns (32) are provided in the positioning grooves (31), and the positioning columns (32) are used to pass through the through holes (16) on the connecting terminals (15) to position the connecting terminals (15) in a horizontal direction; A positioning member (41) is provided on the support seat (4), and the positioning member (41) is used to support and position the steel sleeve (14) in the vertical direction and / or the horizontal direction.

2. The capacitor potting and positioning device according to claim 1, wherein: A protruding partition (33) is provided between two adjacent positioning grooves (31), and the two adjacent partitions (33) form the positioning groove (31) to position the connecting terminal (15) in a horizontal direction.

3. The capacitor potting and positioning device according to claim 1, wherein: A holding portion (34) is provided above the positioning seat (3), and the holding portion (34) is detachably mounted on the upper end of the positioning seat (3). The holding portion (34) is used to restrict the connecting terminal (15) within the positioning groove (31) to position the connecting terminal (15) in a vertical direction.

4. The capacitor potting and positioning device according to claim 3, wherein: The holding portion (34) is arranged correspondingly along the distribution of the plurality of connection terminals (15), the holding portion (34) is provided with a locking portion, and the positioning seat (3) is provided with a connecting portion (35), and the holding portion (34) is detachably mounted on the positioning seat (3) through the cooperation between the locking portion and the connecting portion (35).

5. The capacitor potting and positioning device according to claim 1, wherein: The positioning member (41) comprises a positioning shaft (411), and the positioning shaft (411) is used for inserting and installing the steel sleeve (14) to position the housing (11).

6. The capacitor potting and positioning device according to claim 5, wherein: The installation axis of the installation steel sleeve (14) is vertical, the support seat (4) is used to support the lower end of the installation steel sleeve (14), and the positioning shaft (411) is set as a vertical shaft (4111) and is used to insert the installation steel sleeve (14) to position the shell (11).

7. The capacitor potting and positioning device according to claim 6, wherein: The positioning shaft (411) is configured as a stepped shaft, and the diameter of the positioning shaft (411) gradually decreases from one end to the other end of the support seat (4).

8. The capacitor potting and positioning device according to claim 5, wherein: The installation axis of the installation steel sleeve (14) is horizontal, the positioning shaft (411) is set as a horizontal axis (4112) and is used to insert the installation steel sleeve (14), the support seat (4) is provided with a mounting hole for the positioning shaft (411) to slide along the axis direction, and limiting parts (52) are set at both ends of the positioning shaft (411), and the limiting parts (52) are used to limit the installation steel sleeve (14) from being separated from the positioning shaft (411) to position the housing (11).

9. The capacitor potting and positioning device according to claim 8, wherein: The positioning shaft (411) is provided with an elastic portion (415), which is provided on the positioning shaft (411) and is used to drive the positioning shaft (411) to slide along the axial direction to achieve automatic clamping of the installed steel sleeve (14).

10. The capacitor potting and positioning device according to claim 1, wherein: A pressing plate (5) is also provided on the base (2). The plane where the pressing plate (5) is located is vertically arranged and is used to press the heat dissipation fins (13) of the capacitor (1) to position the heat dissipation fins (13).

Images