Special-shaped capacitor electrode terminal positioning device, positioning method and special-shaped capacitor

Abstract

The special-shaped capacitor electrode terminal positioning device comprises two limiting longitudinal arms and a positioning transverse arm, each limiting longitudinal arm is provided with two special-shaped capacitor width size limiting arms and two special-shaped capacitor height size limiting arms, and the positioning transverse arm is provided with two positioning transverse arms. The two special-shaped capacitor width size limiting arms and the two special-shaped capacitor height size limiting arms are arranged and distributed on the same limiting longitudinal arm at intervals, and the height of the bottom end faces of the two special-shaped capacitor height size limiting arms is larger than that of the bottom end faces of the two special-shaped capacitor width size limiting arms. The two limiting longitudinal arms are connected with a positioning cross arm at a position between the two special-shaped capacitor height size limiting arms, and positioning hole sites matched with special-shaped capacitor electrode leading-out terminals for positioning are distributed on the positioning cross arm. The cross section of the side surface of the special-shaped capacitor is provided with a capacitor structure with step-shaped high and low top end surfaces with different heights. The occupied space is smaller and more reasonable, and the circuit wiring is more reasonable.

Description

Technical Field

[0001] The present invention relates to a capacitor, in particular to a capacitor used as a supporting capacitor for a marine drive motor and an electrode terminal positioning device and a positioning method thereof. Background Art

[0002] As an important component widely used in electrical circuit control circuits, capacitors are widely used in circuits for DC isolation, AC passing, coupling, bypassing, filtering, tuning circuits, energy conversion or control and other functional applications. Before the capacitor is officially put into product application, the capacitor core or core group needs to be encapsulated and solidified in the capacitor packaging shell before it can be finally put into actual products and applied to various circuits. However, the shell shapes used in existing capacitor packaging shells are basically square, cylindrical and other neatly structured packaging shell structures. This also requires that when the packaged capacitors are actually used in the circuit at a later stage, they need to be provided with an equally appropriate, neat and regular installation and use space. However, since the electronic circuit takes into account the impact of multiple devices on the comprehensive performance of the circuit when designing the circuit layout, the circuit wiring layout is comprehensively designed, which means that when designing the circuit layout, the devices distributed on the side of the capacitor may appear in different heights, and the circuit layout space is relatively limited. This requires that the supporting capacitors for marine motor drives need to be able to better meet the different heights of the use space during use. However, the existing supporting capacitors for marine motor drives and other supporting capacitors used to maintain voltage stability and grid stability cannot effectively cooperate with the scenarios where the devices on the side of the capacitor appear in different heights, and need to occupy more circuit wiring layout space.

[0003] The authorized patent No. ZL202021693744.3, which was announced on March 9, 2021, discloses a DC support capacitor for a vehicle motor controller, including a housing and a capacitor core group, wherein the positive and negative poles of the capacitor core group are respectively connected with positive and negative connection busbars, and the positive and negative connection busbars are respectively connected with positive and negative terminal posts on one hand, and positive and negative terminal boards on the other hand; the lead-out ends of the positive and negative terminal posts are respectively deflected to one side, and the positive and negative terminal boards are close to each other, with an insulating sheet between the two; the ends of the lead-out ends of the positive and negative terminal posts and the positive and negative terminal boards are respectively fixedly connected with wiring terminals, and the lead-out ends of the positive and negative terminal posts and the lead-out ends of the positive and negative terminal boards are respectively located on both sides of the housing and staggered with each other. The utility model reduces interference, effectively protects the IGBT module, reduces costs, is conducive to heat dissipation, and is easy to identify when performing wiring operations on site, and wiring errors will not occur. However, there is also a defect that the devices cannot effectively match the side positions of the capacitors and appear in different heights, which requires more space for circuit wiring layout. Summary of the invention

[0004] The present invention aims to solve the problem that the supporting capacitors used to maintain voltage stability and grid stability in existing marine drive motors cannot effectively cooperate with the scenarios where devices at the periphery of the capacitors appear in different heights, and need to occupy more circuit wiring layout space. The present invention provides a positioning device and a positioning method for electrode terminals of special-shaped capacitors, which can effectively cooperate with the scenarios where devices at the periphery of the capacitors appear in different heights, and need to occupy a smaller and more reasonable space for circuit wiring layout, and a special-shaped capacitor thereof.

[0005] The specific technical solution adopted by the present invention to solve the above technical problems is: a positioning device for electrode terminals of special-shaped capacitors, characterized in that: it includes two limiting longitudinal arms and a positioning transverse arm, each limiting longitudinal arm is provided with two limiting arms for the width dimension of the special-shaped capacitor and two limiting arms for the height dimension of the special-shaped capacitor, the two limiting arms for the width dimension of the special-shaped capacitor are used to limit the width dimension of the capacitor of the lower step height dimension part in the special-shaped capacitor, the two limiting arms for the height dimension of the special-shaped capacitor are used to limit the low top surface of the lower step height dimension part in the special-shaped capacitor, the two limiting arms for the width dimension of the special-shaped capacitor and the two limiting arms for the height dimension of the special-shaped capacitor are used to limit the low top surface of the lower step height dimension part in the special-shaped capacitor, The size limiting arms are arranged in an interval distribution structure on the same limiting longitudinal arm, and the bottom end heights of the two special-shaped capacitor height limiting arms are higher than the bottom end heights of the two special-shaped capacitor width limiting arms, wherein the inner side spacing distance dimension between the last special-shaped capacitor width limiting arm and the adjacent special-shaped capacitor height limiting arm is greater than the capacitor width dimension of the higher step height dimension part in the special-shaped capacitor, and the two limiting longitudinal arms are connected with a positioning cross arm at the position between the two special-shaped capacitor height limiting arms, and the positioning cross arm is provided with positioning holes that match the electrode lead-out terminals of the special-shaped capacitor. Through the reasonable setting of the shape and size of the limiting positioning of the two limiting longitudinal arms and the positioning cross arm, as well as the two special-shaped capacitor width limiting arms and the two special-shaped capacitor height limiting arms, the high and low step-shaped special-shaped capacitor is obtained, which can more effectively cooperate with the devices at the side of the capacitor to appear in different height positions, and requires a smaller and more reasonable occupation, and the circuit wiring layout space is more reasonable.

[0006] Preferably, the two width-limiting arms of the special-shaped capacitors and the two height-limiting arms of the special-shaped capacitors are both rectangular limit column structures, thereby improving the accuracy, stability, reliability and effectiveness of the two limit arms in achieving limit positioning tasks.

[0007] Preferably, the positioning cross arm is provided with four positioning holes that match the lead-out terminals of the special-shaped capacitor electrodes, thereby improving the effectiveness of accurate positioning of the lead-out terminals of the special-shaped capacitor electrodes.

[0008] Preferably, the two limiting longitudinal arms are provided with a trapezoidal raised protrusion, the two trapezoidal raised protrusions are connected with a positioning cross arm, and the positioning cross arm is provided with 4 positioning holes that match the special-shaped capacitor electrode lead-out terminals. This improves the reliability and effectiveness of the positioning operation of the positioning cross arm in achieving the precise positioning effectiveness of the special-shaped capacitor electrode lead-out terminals, and avoids being affected by the height size of the special-shaped capacitor electrode lead-out terminals themselves.

[0009] Preferably, the bottom end surface height of the positioning horizontal arm is higher than the top end surface height of the limiting longitudinal arm, thereby effectively ensuring the limiting height dimension of the positioning horizontal arm in accurately positioning the lead-out terminal of the special-shaped capacitor electrode.

[0010] Preferably, the positioning hole has an internal thread structure, and the internal thread of the positioning hole has the same internal thread structure as the internal thread of the special-shaped capacitor electrode lead-out terminal, thereby improving the precise positioning, stability, reliability and effectiveness of the threaded connection with the special-shaped capacitor electrode lead-out terminal.

[0011] Another invention object of the present invention is to provide a method for positioning electrode terminals of special-shaped capacitors, characterized in that: the positioning device for electrode terminals of special-shaped capacitors described in one of the above technical solutions is adopted, including the following positioning steps: A1. Place the inner core group with the electrodes on both ends of the capacitor core group welded and the electrode lead terminals thereof in the capacitor core group accommodating cavity of the special-shaped capacitor packaging shell from the side opening direction of the capacitor packaging shell; A2. The electrode terminal positioning device of the special-shaped capacitor is installed from the capacitor width of the higher step height dimension part of the special-shaped capacitor packaging shell, and the two special-shaped capacitor height dimension limiting arms are limited to the lower top surface contact of the lower step height dimension part in the special-shaped capacitor; A3. After the above step A2 is in contact with the lower top surface, the two width limiting arms of the special-shaped capacitor automatically limit the width of the capacitor at the lower step height dimension part of the special-shaped capacitor; A4. After completing the above steps A2 to A3, check whether the two special-shaped capacitor height limit arms and the two special-shaped capacitor width limit arms are in place for limiting the positioning of the special-shaped capacitor, and whether the four positioning holes on the positioning cross arm and the four lead-out terminals of the special-shaped capacitor electrodes are in place for limiting the positioning; A5. Accurately position the four positioning holes on the positioning cross arm of the special-shaped capacitor electrode terminal positioning device with the four lead terminals of the special-shaped capacitor electrode, and use fastening screws or fastening bolts to position and connect the four lead terminals to the positioning cross arm accurately; A6. After completing the precise positioning and connection of step A5 above, the special-shaped capacitor to be packaged, with the four lead terminals precisely positioned, is transferred to the packaging process; A7. Inject epoxy encapsulation glue from the side opening direction of the capacitor packaging shell with the positioning device for the electrode terminal of the special-shaped capacitor, and perform epoxy encapsulation and curing on the special-shaped capacitor to be encapsulated; A8. After the epoxy encapsulation is cured, the electrode terminal positioning device of the special-shaped capacitor installed in the above step is removed to obtain a special-shaped capacitor with a side opening after the encapsulation is cured; A9. Weld the side opening of the capacitor packaging shell to close the shell side to form a complete capacitor.

[0012] By reasonably setting two limiting longitudinal arms and one positioning horizontal arm, as well as two limiting arms for the width dimension of the special-shaped capacitor and two limiting arms for the height dimension of the special-shaped capacitor, the shape and size of the special-shaped capacitor and the electrode lead-out terminals of the special-shaped capacitor are limited and positioned, thereby finally obtaining a cured and packaged special-shaped capacitor, which can effectively cooperate with the devices at the side of the capacitor to appear in different height positions, requires smaller and more reasonable space for circuit wiring layout, and improves the safety of circuit electrical use.

[0013] Preferably, the capacitor packaging shell adopts a stainless steel packaging shell structure, which improves the acid and alkali resistance of the special-shaped capacitor and increases the service life of the special-shaped capacitor.

[0014] Another invention purpose of the present invention is to provide a special-shaped capacitor, characterized in that: the special-shaped capacitor is positioned by using the special-shaped capacitor electrode terminal positioning device described in one of the above technical solutions and the special-shaped capacitor electrode terminal positioning method described in one of the above technical solutions, the special-shaped capacitor has a capacitor structure with stepped top surfaces of different heights, the side section of the capacitor is a single stepped structure, and the side forms an L-shaped high and low step side capacitor overall structure with two sections of different outer circumference sizes, the height of the bottom end surface of the stepped high and low capacitor is the same, and a capacitor core group arranged in multiple rows is provided in the capacitor packaging shell. It can effectively cooperate with the scene of different heights of the device at the side of the capacitor, and it needs to occupy a smaller and more reasonable space, and the circuit wiring layout is more reasonable.

[0015] Preferably, the capacitor packaging shell is composed of two rectangular first packaging shells and second packaging shells, the internal space of the first packaging shell is completely connected with the internal space of the second packaging shell, the width of the first packaging shell is smaller than the width of the second packaging shell, the top end of the second packaging shell adjacent to the first packaging shell is provided with a capacitor electrode lead-out port top end surface, and the capacitor electrode lead-out port top end surface is provided with a capacitor electrode lead-out terminal; the internal width space size of the first packaging shell can at least accommodate two rows of capacitor cores, and the internal width space size of the first packaging shell can accommodate more than two rows of capacitor cores. Improve the effectiveness of the square shell-free space area formed by the L-shaped inner shell, improve the scene of different positions of the devices at the side of the capacitor, and realize the effectiveness of occupying less circuit wiring layout space. Improve the overall manufacturing simplicity and reliability of the capacitor packaging shell. Improve the effectiveness of the square shell-free space area formed by the L-shaped inner shell, improve the scene of different positions of the devices at the side of the capacitor, and realize the effectiveness of occupying less circuit wiring layout space. Improve the effectiveness of the capacitor's capacitor packaging capacity, and improve the convenience and flexibility of the combined capacitor of multiple different capacitance capacitor groups after packaging. Improve the stability and effectiveness of the installation and connection of the capacitor electrode lead terminals.

[0016] The beneficial effects of the present invention are: it can more effectively cooperate with the devices at the side of the capacitor to appear in different height positions, requires a smaller and more reasonable space for circuit wiring layout, and improves the safety of circuit electrical use. BRIEF DESCRIPTION OF THE DRAWINGS The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 The invention discloses a structural schematic diagram of a positioning device and a positioning method for an electrode terminal of a special-shaped capacitor and a positioning device for an electrode terminal of a special-shaped capacitor in the special-shaped capacitor.

[0019] Figure 2 yes Figure 1 Schematic diagram of the left view structure.

[0020] Figure 3 yes Figure 1 Schematic diagram of the center positioning cross arm structure.

[0021] Figure 4 It is a three-dimensional structural schematic diagram of a positioning device and a positioning method for an electrode terminal of a special-shaped capacitor and a positioning device for an electrode terminal of a special-shaped capacitor in a special-shaped capacitor of the present invention.

[0022] Figure 5The present invention is a structural schematic diagram of a positioning device and a positioning method for an electrode terminal of a special-shaped capacitor and a special-shaped capacitor thereof when the positioning device for an electrode terminal of a special-shaped capacitor is used to position the special-shaped capacitor.

[0023] Figure 6 The invention discloses a side view structural diagram of a special-shaped capacitor after the positioning device for electrode terminals of the special-shaped capacitor is removed, a positioning method thereof and the special-shaped capacitor thereof.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of a special-shaped capacitor finally obtained by the positioning device and method for electrode terminals of a special-shaped capacitor of the present invention and the special-shaped capacitor. DETAILED DESCRIPTION

[0025] Embodiment 1: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 In the embodiment shown, a positioning device for an electrode terminal of a special-shaped capacitor includes two limiting longitudinal arms 20 and a positioning transverse arm 10. Two limiting arms 40 for the width of the special-shaped capacitor and two limiting arms 30 for the height of the special-shaped capacitor are installed and connected on each limiting longitudinal arm 20. The two limiting arms 40 for the width of the special-shaped capacitor are used to limit the width W3 of the capacitor of the lower step height size portion of the special-shaped capacitor (see Figure 5 ), the two special-shaped capacitor height limit arms 30 are used to limit the lower top surface 51 of the lower step height size part of the special-shaped capacitor (see Figure 5 ), two special-shaped capacitor width limit arms 40 and two special-shaped capacitor height limit arms 30 are arranged in a staggered distribution structure on the same limit longitudinal arm, and the bottom end heights of the two special-shaped capacitor height limit arms are above the bottom end heights of the two special-shaped capacitor width limit arms, wherein the inner side surface spacing distance dimension W2 (see the distance dimension W2 between the last special-shaped capacitor width limit arm and the adjacent special-shaped capacitor height limit arm) is greater than the bottom end height of the two special-shaped capacitor width limit arms. Figure 1 ) is larger than the width dimension W4 of the capacitor with higher step height dimension in the special-shaped capacitor (see Figure 5 ), two limiting longitudinal arms 20 are connected and fixed with a positioning horizontal arm 10 at the position between the two special-shaped capacitor height limiting arms 30, and the positioning horizontal arm 10 is provided with positioning holes 11 that match the positioning of the electrode lead-out terminals of the special-shaped capacitor. The positioning horizontal arm 10 is provided with a positioning groove 14 recessed upward at the bottom end surface corresponding to each positioning hole 11 (see Figure 3), the inner groove top of the positioning groove 14 is connected to the bottom hole of the corresponding positioning hole 11, and the groove shape of the positioning groove 14 matches the outer circumference of the electrode lead terminal of the special-shaped capacitor with irregular height steps. The above-mentioned higher step height dimension, lower step height dimension, capacitor width dimension W4 of the higher step height dimension, and capacitor width dimension W3 of the lower step height dimension are relative to Figure 5 , Figure 6 , Figure 7 The relative difference in the height of the steps in the viewing direction of the view shown.

[0026] The two special-shaped capacitor width limit arms 40 and the two special-shaped capacitor height limit arms 30 both adopt a rectangular limit column structure.

[0027] The positioning cross arm 10 is provided with four positioning holes 11 which match the lead-out terminals of the special-shaped capacitor electrodes.

[0028] The two limiting longitudinal arms 20 are both extended and connected with a trapezoidal raised protrusion 12, and the two trapezoidal raised protrusions 12 are connected with a positioning cross arm 10, and the positioning cross arm 10 is distributed with four positioning holes 11 that match the lead-out terminals of the special-shaped capacitor electrodes.

[0029] The height of the bottom end surface 13 of the positioning cross arm is higher than or equal to the height of the top end surface 21 of the limiting longitudinal arm.

[0030] The positioning hole 11 has an internal thread structure, and the internal thread of the positioning hole 11 is connected to the special-shaped capacitor electrode lead-out terminal 70 (see Figure 6 ) The internal threads have the same internal thread structure.

[0031] Embodiment 2: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 In the embodiment shown, a method for positioning an electrode terminal of a special-shaped capacitor adopts the positioning device for the electrode terminal of the special-shaped capacitor described in the above embodiment 1, and includes the following positioning steps: A1. The inner core group 60 of the capacitor core group with both end electrodes and electrode lead terminals welded thereto is placed in the capacitor core group accommodating cavity of the special-shaped capacitor package shell from the side opening direction of the capacitor package shell (see Figure 5 ); A2. The electrode terminal positioning device of the special-shaped capacitor is installed from the capacitor width of the higher step height dimension portion of the special-shaped capacitor package shell and the two special-shaped capacitor height dimension limiting arms 30 are limited to the contact position of the lower top surface 51 of the lower step height dimension portion in the special-shaped capacitor; A3. After the above step A2 is in contact with the lower top surface, the two special-shaped capacitor width limit arms automatically limit the capacitor width W3 of the lower step height dimension part of the special-shaped capacitor. At this time, the inner side spacing dimension W1 between the two special-shaped capacitor width limit arms (see Figure 1 ) is the same as or corresponding to the width W3 of the capacitor at the lower step height dimension portion in the special-shaped capacitor; A4. After completing the above steps A2 to A3, check whether the two special-shaped capacitor height limit arms and the two special-shaped capacitor width limit arms are in place for limiting the positioning of the special-shaped capacitor, and whether the four positioning holes on the positioning cross arm and the four lead-out terminals of the special-shaped capacitor electrodes are in place for limiting the positioning; A5. The four positioning holes on the positioning arm 10 in the positioning device for the special-shaped capacitor electrode terminal are precisely positioned with the four lead terminals 70 of the special-shaped capacitor electrode, and the four lead terminals 70 are precisely positioned and connected with the positioning arm 10 using fastening screws or fastening bolts; A6. After completing the precise positioning and connection of step A5 above, the special-shaped capacitor to be packaged, with the four lead terminals precisely positioned, is transferred to the packaging process; A7. Inject epoxy encapsulation glue 61 from the side opening direction of the capacitor package housing with a special-shaped capacitor electrode terminal positioning device to epoxy encapsulate and cure the special-shaped capacitor to be encapsulated; A8. After the epoxy encapsulation is cured, remove the electrode terminal positioning device of the special-shaped capacitor installed in the above step to obtain the special-shaped capacitor with side opening after the encapsulation is cured (see Figure 6 ); A9. Weld the side opening of the capacitor package shell to close the shell side to form a complete capacitor (see Figure 7 ).

[0032] The capacitor packaging shells all adopt a stainless steel packaging shell structure. Others are the same as in Example 1.

[0033] Embodiment 3: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7In the embodiment shown, a special-shaped capacitor is positioned by using the special-shaped capacitor electrode terminal positioning device described in the above embodiment 1 and the special-shaped capacitor electrode terminal positioning method described in the above embodiment 2 to obtain a special-shaped capacitor (see Figure 6 There are also special-shaped capacitors with side openings). Special-shaped capacitors have capacitor structures with stepped high and low top surfaces of different heights. The side cross-section of the capacitor is a single step-shaped structure. The side forms an L-shaped high and low step side capacitor overall structure with two sections of different outer circumference sizes. The height of the bottom end surface of the stepped high and low capacitors is the same. The capacitor packaging shell is provided with multiple rows of capacitor core groups. The capacitor packaging shell 50 is composed of two rectangular first packaging shells and second packaging shells. The internal space of the first packaging shell 52 and the internal space of the second packaging shell 53 are completely connected. The width of the first packaging shell is smaller than the width of the second packaging shell. The top end of the second packaging shell 53 adjacent to the first packaging shell is provided with a capacitor electrode lead-out port top surface 51, and the capacitor electrode lead-out port top surface is provided with a capacitor electrode lead-out terminal 70; the internal width space size of the first packaging shell 52 can at least accommodate two rows of capacitor cores 60, and the internal width space size of the first packaging shell is sufficient to accommodate more than two rows of capacitor cores. The width size of the first packaging shell is 35-50% of the width size of the second packaging shell. Improve the effectiveness of the square shell-free space area formed by the L-shaped inner shell, improve the scene of different heights of the devices at the side of the capacitor, and realize the effectiveness of occupying less circuit wiring layout space. The height dimension of the first package shell is 80-120% of the height dimension of the second package shell. Improve the effectiveness of the square shell-free space area formed by the L-shaped inner shell, improve the scene of different heights of the devices at the side of the capacitor, and realize the effectiveness of occupying less circuit wiring layout space. The wall thickness of the first package shell is the same as that of the second package shell; improve the overall manufacturing simplicity, reliability and effectiveness of the capacitor package shell. The second package shell is provided with a capacitor electrode lead terminal fixing seat 54 on the inner wall side of the capacitor lead port surface; improve the stability and effectiveness of the capacitor electrode lead terminal installation connection; an insulating pad is provided between the capacitor electrode lead terminal fixing seat 54 and the capacitor electrode lead terminal 70 to further improve the capacitor creepage safety. The top surface of the first packaging shell 52 is connected with two installation angle steels 55 and a lifting handle 56. The lifting handle 56 improves the production process and field installation and operation of the special-shaped capacitor. The two installation angle steels 55 are both provided with installation connection holes 551. The top of the special-shaped capacitor is connected and fixed to the installation carrier through the two installation angle steels 55. The rest is the same as that of Embodiment 1 and Embodiment 2.

[0034] In the description of the positional relationship of the present invention, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing the embodiments and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] The above content and structure describe the basic principle, main features and advantages of the product of the present invention, which should be understood by those skilled in the art. The above examples and descriptions are only for explaining the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which are within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A positioning device for electrode terminals of special-shaped capacitors, characterized in that: The invention comprises two limiting longitudinal arms and a positioning transverse arm, each limiting longitudinal arm is provided with two limiting arms for the width dimension of the special-shaped capacitor and two limiting arms for the height dimension of the special-shaped capacitor, the two limiting arms for the width dimension of the special-shaped capacitor are used to limit the width dimension of the capacitor of the lower step height dimension part in the special-shaped capacitor, the two limiting arms for the height dimension of the special-shaped capacitor are used to limit the low top surface of the lower step height dimension part in the special-shaped capacitor, and the two limiting arms for the width dimension of the special-shaped capacitor and the two limiting arms for the height dimension of the special-shaped capacitor are arranged in an interval distribution structure on the same limiting longitudinal arm , and the bottom end heights of the two special-shaped capacitor height limit arms are higher than the bottom end heights of the two special-shaped capacitor width limit arms, wherein the inner side spacing distance between the last special-shaped capacitor width limit arm and the adjacent special-shaped capacitor height limit arm is greater than the capacitor width dimension of the higher step height dimension part of the special-shaped capacitor, and the two limiting longitudinal arms are connected with a positioning cross arm at the position between the two special-shaped capacitor height limit arms, and the positioning cross arm is distributed with positioning holes that match the positioning of the special-shaped capacitor electrode lead-out terminals.

2. The device for positioning the electrode terminal of a special-shaped capacitor according to claim 1, characterized in that: The two width limiting arms of the special-shaped capacitors and the two height limiting arms of the special-shaped capacitors all adopt a rectangular limiting column structure.

3. The device for positioning the electrode terminal of a special-shaped capacitor according to claim 1, characterized in that: The positioning cross arm is provided with 4 positioning holes which match and position the lead-out terminals of the special-shaped capacitor electrodes.

4. The device for positioning electrode terminals of special-shaped capacitors according to claim 1, characterized in that: The two limiting longitudinal arms are both provided with a trapezoidal raised protrusion, the two trapezoidal raised protrusions are connected with a positioning cross arm, and the positioning cross arm is provided with 4 positioning holes matching the lead-out terminals of the special-shaped capacitor electrodes.

5. The device for positioning the electrode terminal of a special-shaped capacitor according to claim 4, characterized in that: The bottom end surface height of the positioning horizontal arm is higher than the top end surface height of the limiting longitudinal arm.

6. The device for positioning the electrode terminal of a special-shaped capacitor according to claim 4, characterized in that: The positioning hole has an internal thread structure, and the internal thread of the positioning hole has the same internal thread structure as the internal thread of the lead-out terminal of the special-shaped capacitor electrode.

7. A method for positioning electrode terminals of special-shaped capacitors, characterized in that: The device for positioning the electrode terminal of a special-shaped capacitor according to any one of claims 1 to 6 is used, and the positioning step includes the following steps: A1. Place the inner core group with the electrodes on both ends of the capacitor core group welded and the electrode lead terminals thereof in the capacitor core group accommodating cavity of the special-shaped capacitor packaging shell from the side opening direction of the capacitor packaging shell; A2. The electrode terminal positioning device of the special-shaped capacitor is installed from the capacitor width of the higher step height dimension part of the special-shaped capacitor packaging shell, and the two special-shaped capacitor height dimension limiting arms are limited to the lower top surface contact of the lower step height dimension part in the special-shaped capacitor; A3. After the above step A2 is in contact with the lower top surface, the two width limit arms of the special-shaped capacitor automatically limit the width of the capacitor at the lower step height dimension part of the special-shaped capacitor; A4. After completing the above steps A2 to A3, check whether the two special-shaped capacitor height limit arms and the two special-shaped capacitor width limit arms are in place for limiting the positioning of the special-shaped capacitor, and whether the four positioning holes on the positioning cross arm and the four lead-out terminals of the special-shaped capacitor electrodes are in place for limiting the positioning; A5. Accurately position the four positioning holes on the positioning cross arm of the special-shaped capacitor electrode terminal positioning device with the four lead terminals of the special-shaped capacitor electrode, and use fastening screws or fastening bolts to position and connect the four lead terminals to the positioning cross arm accurately; A6. After completing the precise positioning and connection of step A5 above, the special-shaped capacitor to be packaged, with the four lead terminals precisely positioned, is transferred to the packaging process; A7. Inject epoxy encapsulation glue from the side opening direction of the capacitor packaging shell with the positioning device for the electrode terminal of the special-shaped capacitor, and perform epoxy encapsulation and curing on the special-shaped capacitor to be encapsulated; A8. After the epoxy encapsulation is cured, the electrode terminal positioning device of the special-shaped capacitor installed in the above step is removed to obtain a special-shaped capacitor with a side opening after the encapsulation is cured; A9. Weld the side opening of the capacitor packaging shell to close the shell side to form a complete capacitor.

8. The method for positioning electrode terminals of special-shaped capacitors according to claim 7, characterized in that: The capacitor packaging shell adopts a stainless steel packaging shell structure.

9. A special-shaped capacitor, characterized in that: A special-shaped capacitor is positioned by using the positioning device for the electrode terminal of a special-shaped capacitor as described in one of claims 1 to 6 and the positioning method for the electrode terminal of a special-shaped capacitor as described in one of claims 7 to 8. The special-shaped capacitor has a capacitor structure with stepped high and low top surfaces of different heights, the side cross-section of the capacitor is a single stepped structure, and the side forms an L-shaped high and low step side capacitor overall structure with two sections of different outer circumference sizes, the bottom end surfaces of the stepped high and low capacitors are the same height, and a capacitor core group arranged in multiple rows is provided in the capacitor packaging shell.

10. The special-shaped capacitor according to claim 9, characterized in that: The capacitor packaging shell is composed of two rectangular first packaging shells and second packaging shells connected together. The internal space of the first packaging shell is completely connected to the internal space of the second packaging shell. The width of the first packaging shell is smaller than the width of the second packaging shell. The top end of the second packaging shell adjacent to the inner side of the folded first packaging shell is provided with a top end surface of a capacitor electrode lead-out port, and the top end surface of the capacitor electrode lead-out port is provided with a capacitor electrode lead-out terminal; the internal width space size of the first packaging shell can at least accommodate two rows of capacitor cores, and the internal width space size of the first packaging shell can accommodate more than two rows of capacitor cores.

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