A capacitor

Abstract

The application discloses a capacitor which is welded together by a plurality of capacitor cores through a supporting busbar in a strip shape, the supporting busbar is provided with a specific electrode terminal structure, i.e. a curved strip-shaped solid structure, welding points are all located on the structure, the welding points are wrapped and covered at the end of the strip-shaped solid, the electrode terminal structure has a certain degree of elastic deformation and plastic deformation, and the stress of the welding points can be released through deformation; and each electrode terminal has at least two spaced strip-shaped solids, even if extreme stress occurs and one strip-shaped solid is damaged, the other strip-shaped solid can also ensure the basic function of the capacitor; in addition, the strip-shaped supporting busbar itself has a certain deformability, and in combination with the electrode terminal structure, the capacitor can absorb stress and automatically release stress through the elastic deformation of the supporting busbar, welding point cracking is avoided, and the fatigue resistance is improved.

Description

Technical Field

[0001] This invention relates to the field of capacitor technology, and in particular to a capacitor. Background Technology

[0002] As a basic component, capacitors are widely used in power electronic equipment. They are usually led out from the busbar as the positive and negative terminals. The busbar is welded to the surface of the capacitor core through the welding pin structure, forming a welding point to fix it and form a current path.

[0003] During the production process, the internal structure of a capacitor undergoes a series of processes, including clamping, handling, and performance testing. These processes subject the solder joints to external forces, either directly or indirectly (such as the compressive stress of the clamps or the impact and vibration during handling). If the stress at the solder joint cannot be released, continuous stress will lead to metal fatigue at the solder joint, eventually causing it to detach and resulting in an internal open circuit failure of the capacitor.

[0004] During use, capacitors are frequently exposed to varying environments, including high and low temperatures and changes in humidity. These changes cause the internal components (core, busbars, filler, etc.) to have different coefficients of expansion due to their different materials, resulting in varying degrees of expansion or contraction. The filler, in its final solid state, possesses a degree of elasticity, has a large distribution area within the capacitor, and is sensitive to temperature changes—expanding at high temperatures and contracting at low temperatures. Because the filler is in close contact with the core, busbars, solder pins, and other components, its expansion / contraction transfers stress to the solder joints through physical contact. If this stress cannot be released, long-term stress can lead to solder joint detachment or mechanical damage to the core, busbars, and other components.

[0005] For large capacitors, the stress problem is particularly prominent due to the large number of cores and the high proportion of filler material. The large number of cores causes stress in each core to be transmitted to adjacent solder joints via the busbar; the high filler material proportion amplifies volume changes under environmental variations, further exacerbating stress transmission. Related technologies passively resist stress through shell buffering (such as spring clamps) or busbar strength optimization (such as thickening copper plates), but these do not solve the problem of stress superposition caused by external forces during manufacturing, filler material stress, and the large number of cores / filler material in large capacitors. The risk of solder joint detachment remains high, affecting capacitor reliability. Summary of the Invention

[0006] The present invention aims to at least partially solve one of the technical problems in the aforementioned technologies. Therefore, the object of the present invention is to provide a capacitor that solves the problem of solder joint detachment caused by stress concentration in the core.

[0007] To achieve the above objectives, embodiments of the present invention provide a capacitor comprising:

[0008] The shell has a receiving cavity;

[0009] A capacitor core assembly is disposed within the receiving cavity and has multiple capacitor cores, wherein at least three of the multiple capacitor cores are arranged in a first direction and at least one is arranged in a second direction perpendicular to the first direction;

[0010] At least two support busbars, wherein at least one of the support busbars is connected to a first end face electrode of the plurality of capacitor cores, and at least one of the support busbars is connected to a second end face electrode of the plurality of capacitor cores; the support busbar has a body and a plurality of electrode terminals, the body extends along a first direction and has opposing first and second sides, the plurality of electrode terminals are spaced apart along the first direction on the first and second sides of the body, each electrode terminal is at least two spaced-apart curved strip entities extending from the body, and the ends of the plurality of strip entities of each electrode terminal are welded together to the end face electrode of the corresponding capacitor core to form a welding point covering the ends of the plurality of strip entities;

[0011] A lead-out busbar is connected to the support busbar to draw out the power of the capacitor core assembly;

[0012] The filler is filled into the cavity and cured within the cavity.

[0013] According to an embodiment of the present invention, a capacitor comprises multiple capacitor cores welded together by a strip-shaped support busbar. The support busbar has a specific electrode terminal structure, namely a curved strip-shaped solid structure, on which the welding points are all located. The welding points are located at the ends (tails) of the strip-shaped solids. This electrode terminal structure has a considerable degree of elastic and plastic deformation, which can release the stress at the welding points through deformation. Furthermore, each electrode terminal has at least two spaced strip-shaped solids, so even if one strip-shaped solid (welding pin) is damaged under extreme stress, the other can still ensure the basic function of the capacitor. Moreover, the strip-shaped support busbar itself has a certain degree of deformability. Combined with the above-mentioned electrode terminal structure, the capacitor can absorb stress and automatically release stress through the elastic deformation of the support busbar, avoiding cracking of the welding points and improving fatigue resistance.

[0014] In addition, a capacitor according to the above embodiments of the present invention may also have the following additional technical features:

[0015] Optionally, each of the electrode terminals has two strip entities, and the two strip entities have different bending directions.

[0016] Optionally, each of the electrode terminals has one or more bends in its strip-shaped structure; each strip can be bent in any direction.

[0017] Optionally, in the same support busbar, the end face electrode of each capacitor core is connected to an electrode terminal located on a first side of the main body and an electrode terminal located on a second side of the main body.

[0018] Furthermore, the first and second sides of the main body are provided with a plurality of slots, each slot corresponding to an electrode terminal, and the strip-shaped entity of each electrode terminal extends from the bottom edge of the corresponding slot.

[0019] Optionally, it also includes a connecting busbar;

[0020] The plurality of capacitor cores are arranged in a rectangular array along the first direction and the second direction, with the number of columns in the first direction being ≥2 and the number of rows in the second direction being ≥2;

[0021] The support busbar includes a first support busbar and a second support busbar; the first end face electrodes of each column of capacitor cores are welded through the first support busbar, and the second end face electrodes of each column of capacitor cores are welded through the second support busbar, together forming an inner core strip extending along the first direction;

[0022] Along the second direction, the first support busbars and / or the second support busbars of adjacent inner core bars are welded together through the connecting busbars, so that the capacitor core group as a whole forms a mesh structure.

[0023] Therefore, the capacitor can be divided into multiple parts according to the number of capacitor cores. The capacitor cores of each part are fixed by the support busbar to form multiple inner core strips. The connecting busbar then connects the inner core strips along the second direction to form an overall mesh structure, which improves the structural strength and reduces damage caused by uneven stress on individual cores. In addition, the connecting busbar increases the deformability between the inner core strips, further improving the stress release capability. The overall mesh structure reduces the stress concentration transmitted to the welding point by the elastic deformation of the support busbar and the stress generated by the expansion / contraction of the filler material by the connecting busbar, so as to achieve automatic stress release at the welding point.

[0024] Furthermore, the connecting busbar has a connecting body and a plurality of connecting terminals, the bodies of the first supporting busbar and the second supporting busbar extend along the first direction, and the connecting body of the connecting busbar extends along the second direction.

[0025] More specifically, the connecting terminals are welded to the main body of the first support busbar and / or the main body of the second support busbar. Each connecting terminal is at least two spaced-apart curved strip entities extending from the connecting body. The ends of the strip entities of each connecting terminal are welded to the corresponding main body of the first support busbar and / or the main body of the second support busbar to form a welding point.

[0026] Optionally, positioning holes are provided on the main body of the supporting busbar and the connecting body of the connecting busbar, and positioning posts that cooperate with the positioning holes are provided on the end electrode of the capacitor core. Through the engagement of the positioning holes and the positioning posts, the positioning of the supporting busbar and the capacitor core, as well as the positioning of the connecting busbar and the supporting busbar, can be realized.

[0027] Furthermore, each of the capacitor cores has a positioning post on its end electrode, and the main body of the first supporting busbar and / or the main body of the second supporting busbar are provided with a plurality of positioning holes along the first direction, and the connecting body of the connecting busbar is provided with a plurality of positioning holes along the second direction.

[0028] Furthermore, the positioning post is made of plastic. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a capacitor according to Embodiment 1 of the present invention;

[0030] Figure 2 This is a schematic diagram of the inner core strip of a capacitor according to Embodiment 1 of the present invention;

[0031] Figure 3 This is a cross-sectional view of a capacitor according to Embodiment 1 of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of the supporting busbar or connecting busbar according to Embodiment 1 of the present invention;

[0033] Figure 5 This is a schematic diagram of the internal components of a capacitor according to Embodiment 1 of the present invention;

[0034] Figure 6 This is a schematic diagram of the welding position of the lead busbar of the capacitor according to Embodiment 1 of the present invention;

[0035] Figure 7 This is a partial schematic diagram of the supporting busbar and connecting busbar of the capacitor according to Embodiment 2 of the present invention.

[0036] Label Explanation:

[0037] Shell 1, Receiving cavity 110;

[0038] Capacitor core assembly 2, capacitor core 210, first end face electrode 211, second end face electrode 212, positioning post 220;

[0039] Support busbar 3, main body 310, first side 311, second side 312, slot 313, electrode terminal 320, end 321, positioning hole 330, 630;

[0040] Lead-out busbar 4, welding area 410;

[0041] Filler 5;

[0042] Connecting busbar 6, connecting body 610, connecting terminal 620. Detailed Implementation

[0043] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0044] The following is in conjunction with the appendix Figures 1-7 A capacitor according to an embodiment of the present invention is described in detail.

[0045] Example 1

[0046] In this embodiment, the up-down direction corresponds to the "first direction" described in the scope of the claim, and the left-right direction corresponds to the "second direction" described in the scope of the claim.

[0047] However, the purpose of the above description is only to establish a correspondence between the structure of the claimed scope and the structure of the implementation, and not to limit the invention described in the claimed scope to the structure of the implementation through the above correspondence.

[0048] like Figure 1 and Figure 2 As shown, the capacitor according to an embodiment of the present invention includes a housing 1, a capacitor core assembly 2, a support busbar 3, a lead busbar 4, and a filler 5.

[0049] Specifically, the housing 1 has a receiving cavity 110; the capacitor core assembly 2 is disposed within the receiving cavity 110 and has multiple capacitor cores 210, with at least three of the multiple capacitor cores 210 arranged in a first direction and at least one arranged in a second direction perpendicular to the first direction; at least two support busbars 3 are provided, with at least one support busbar 3 connected to the first end face electrode 211 of the multiple capacitor cores 210 and at least one support busbar 3 connected to the second end face electrode 212 of the multiple capacitor cores 210; the support busbar 3 has a body 310 and multiple electrode terminals 320, the body 310 extending along the first direction and having The main body 310 has a first side 311 and a second side 312. Multiple electrode terminals 320 are spaced apart along a first direction on the first side 311 and the second side 312 of the main body 310. Each electrode terminal 320 is at least two spaced curved strip-shaped entities extending from the main body 310. The ends 321 of the multiple strip-shaped entities of each electrode terminal 320 are welded together to the end face electrode of the corresponding capacitor core 210 to form a welding point S1 covering the ends of the multiple strip-shaped entities. The lead-out busbar 4 is connected to the support busbar 3 to lead out the power of the capacitor core assembly 2. The filler 5 is filled in the receiving cavity 110 and cured in the receiving cavity 110.

[0050] Among them, such as Figure 2 As shown, the capacitor core assembly 2 can be composed of multiple capacitor cores 210 arranged in a vertical direction. Alternatively, it can be as follows... Figure 3 As shown, the capacitor core assembly 2 is composed of multiple capacitor cores 210 arranged in the vertical and horizontal directions. In this embodiment, Figure 3 The capacitor core group 2 consists of 42 capacitor cores 210, which are 7 on the top and bottom and 6 on the left and right.

[0051] The capacitor core 210 is formed by overlapping two metallized films on a dielectric film, on which metals such as aluminum, zinc, and magnesium are deposited, and then rolling or stacking the overlapping metallized films and pressing them into a flat shape. In the capacitor core 210, a first end face electrode 211 is formed on one end face by spraying a metal such as zinc, and a second end face electrode 212 is formed on the other end face by similarly spraying a metal such as zinc.

[0052] exist Figure 1 , Figure 2 and Figure 3 In the capacitor core assembly 2, the two end faces of each capacitor core 210 face the front-to-back direction. The first end face electrode 211 is located on the front side, and the second end face electrode 212 is located on the rear side.

[0053] The support busbar 3 is formed of a conductive material such as a copper plate and includes a main body 310 and a plurality of electrode terminals 320. The support busbar 3 is formed, for example, by appropriately cutting and bending a copper plate, and the electrode terminals 320 and the main body 310 are integrated. The main body 310 has a generally elongated plate shape, and the plurality of electrode terminals 320 are arranged at intervals along the vertical direction on a first side 311 and a second side 312 of the main body 310, so that the support busbar 3 has an overall strip-like shape.

[0054] The electrode terminal 320 is a generally elongated strip-shaped entity that extends to the left or right from the side edge of the body 310 and has a bend. Each electrode terminal 320 has at least two strip-shaped entities, and there is a gap between each strip-shaped entity, that is, each strip-shaped entity is independent and will not interfere with each other.

[0055] Thus, this automatically stress-relieving capacitor uses a strip-shaped support busbar 3 to weld and fix multiple capacitor cores 210 together. The support busbar 3 has a specific electrode terminal structure, namely a curved strip-shaped solid structure. The welding points are all located on this structure, at the ends (tails) of multiple strip-shaped solids of the same electrode terminal. This electrode terminal structure has a considerable degree of elastic and plastic deformation, which can release the stress at the welding points through deformation. Furthermore, each electrode terminal has at least two spaced strip-shaped solids, so even if one strip-shaped solid (welding pin) is damaged under extreme stress, the other can still ensure the basic function of the capacitor. Moreover, the strip-shaped support busbar 3 itself has a certain degree of deformability. Combined with the above-mentioned electrode terminal structure, the capacitor can absorb stress and automatically release stress through the elastic deformation of the support busbar 3, avoiding cracking of the welding points and improving fatigue resistance.

[0056] In specific examples, such as Figure 4 As shown, each electrode terminal 320 has two strip-shaped entities, and the two strip-shaped entities have different bending directions. For example... Figure 4 Each electrode terminal 320 extends from the edge of the first side 311 of the main body 310 to the left as two slender strip-shaped entities. The two strip-shaped entities are relatively far apart at the first side 311. After extending a certain length, the two strip-shaped entities bend towards each other (i.e., one is facing upwards and the other downwards) to reduce the distance between the two strip-shaped entities. Then, the two strip-shaped entities extend to the left. The two ends of this extension are used to weld to the end face electrodes of the capacitor core 210, forming a welding point S1 covering the ends of the two strip-shaped entities. It can be seen that the structural design of the electrode terminal 320 allows the welding point S1 to deform to a certain extent in the X (left-right), Y (front-back), and Z (up-down) directions to release the stress at the welding point S1.

[0057] In a specific example, each electrode terminal 320 has one or more bends in its strip-shaped structure; each strip can be bent in any direction. That is, each electrode terminal 320 constructs a curved strip-shaped structure through one or more bends in its strip-shaped structure, thereby enabling it to deform in multiple directions to release stress. For example... Figure 4 Both of the strip-shaped entities have two bends.

[0058] In a specific example, within the same support busbar 3, the end face electrodes of each capacitor core 210 are connected to an electrode terminal located on the first side 311 of the main body 310 and an electrode terminal located on the second side 312 of the main body 310. That is, as... Figure 2 As shown, for the front support busbar 3, the first end electrode 211 of each capacitor core 210 is connected to an electrode terminal 320a located on the first side 311 and an electrode terminal 320b located on the second side 312. Thus, for... Figure 2 Each capacitor core 210 of the entire inner core strip shown has a welding point S1 on both the left and right sides. The two welding points S1 are more stable, which makes the inner core strip more supportive.

[0059] More specifically, the first side 311 and the second side 312 of the main body 310 are respectively provided with a plurality of slots 313, each slot 313 corresponding to an electrode terminal 320, and the strip-shaped entity of each electrode terminal 320 extends from the bottom edge of the corresponding slot 313. That is, the main body 310 is formed by cutting to create a plurality of slots 313, and each electrode terminal 320 extends from the bottom edge of the corresponding slot 313. More specifically, each electrode terminal 320 is disposed within a slot 313. For example... Figure 4 In the middle, the two strip-shaped entities of the electrode terminal 320 are connected to the main body 310, and the ends do not exceed the slot of the slot 313; thus, it is convenient to process the busbar, and the slot 313 can reduce the probability of the electrode terminal 320 being bumped, thus protecting the electrode terminal 320.

[0060] Preferably, the thickness of the support busbar 3 is 0.2 mm to 0.8 mm.

[0061] According to other embodiments of the present invention, in addition to the above-described row of capacitor cores 210 being welded together by a front support busbar 3 and a rear support busbar 3, the capacitor core assembly 2 may also be as follows: Figure 3 and Figure 5As shown, each column of capacitor cores 210 is welded together by the front support busbar 3 and the rear support busbar 3 to form an inner core strip. The inner core strips are then welded together by the connecting busbar 6, so that the capacitor core group 2 as a whole forms a mesh structure. That is to say, the capacitor with automatic stress release also includes the connecting busbar 6. Multiple capacitor cores 210 are arranged in a rectangular array along the vertical and horizontal directions, and the number of columns in the vertical direction (first direction) is ≥2 and the number of rows in the horizontal direction (second direction) is ≥2. The support busbar 3 includes a first support busbar 3A and a second support busbar 3B. The first end face electrode 211 of each column of capacitor cores 210 is welded through the first support busbar 3A, and the second end face electrode 212 of each column of capacitor cores 210 is welded through the second support busbar 3B, together forming an inner core strip extending along the vertical direction. Along the horizontal direction, the first support busbar 3A and / or the second support busbar 3B of adjacent inner core strips are welded together by the connecting busbar 6, so that the capacitor core group 2 as a whole forms a mesh structure. Thus, the capacitor cores 210 can be divided into multiple parts according to their number. Each part of the capacitor cores 210 is fixed by the support busbar 3 to form multiple inner core strips. The connecting busbar 6 then connects the inner core strips along the second direction to form an overall mesh structure, which improves the structural strength and reduces damage caused by uneven stress on individual cores. Furthermore, the connecting busbar 6 increases the deformability between the inner core strips, further improving the stress release capability. The overall mesh structure reduces the stress concentration transmitted to the welding point S1 by the elastic deformation of the support busbar 3 and the stress generated by the expansion / contraction of the filler 5 by the connecting busbar 6, thereby synergistically achieving automatic stress release at the welding point S1.

[0062] The connecting busbar 6 has a connecting body 610 and multiple connecting terminals 620. The body 310 of the first supporting busbar 3A and the body 310 of the second supporting busbar 3B extend along a first direction, and the connecting body 610 of the connecting busbar 6 extends along a second direction. That is, the extension direction of the connecting body 610 of the connecting busbar 6 is perpendicular to the extension direction of the body 310 of the supporting busbar 3.

[0063] More specifically, the connecting terminals 620 are welded to the main body 310 of the first supporting busbar 3A and / or the main body 310 of the second supporting busbar 3B. Each connecting terminal 620 is at least two spaced-apart curved strip-shaped entities extending from the connecting body 610. The ends of the strip-shaped entities of each connecting terminal 620 are welded to the corresponding main body 310 of the first supporting busbar 3A and / or the main body 310 of the second supporting busbar 3B to form a welding point S2. That is to say, the structure of the connecting terminals 620 of the connecting busbar 6 is the same as that of the electrode terminals 320 of the supporting busbar 3, but the electrode terminals 320 are welded to the end face electrodes of the capacitor core 210, while the connecting terminals 620 are welded to the main body 310 of the supporting busbar 3.

[0064] Therefore, all the supporting busbars 3 and connecting busbars 6 of the capacitor core assembly 2 form a stress-relieving mesh structure, thereby reducing the stress transmitted to the welding point S1. Furthermore, the terminal structure design of the electrode terminals 320 of the supporting busbars 3 and the connecting terminals 620 of the connecting busbars 6 can release the stress on the welding points on the inner core through certain deformations occurring in various directions.

[0065] In a specific example, positioning holes 330 and 630 are provided on both the main body 310 supporting busbar 3 and the connecting main body 610 connecting busbar 6. Positioning posts 220 that mate with the positioning holes 330 and 630 are provided on the end electrode of capacitor core 210. Through the engagement of the positioning holes 330 and 630 with the positioning posts 220, the positioning of the supporting busbar 3 and capacitor core 210, as well as the positioning of the connecting busbar 6 and supporting busbar 3, can be achieved. It can be understood that the positioning holes 330 and 630 and the positioning posts 220 facilitate the connection and assembly between the connecting busbar 6, the supporting busbar 3, and the capacitor core assembly 2.

[0066] Specifically, each capacitor core 210 has a positioning post 230 on its end electrode. The main body 310 of the first supporting busbar 3A and / or the main body 310 of the second supporting busbar 3B have multiple positioning holes 330 distributed along the first direction. The connecting body 610 of the connecting busbar 6 has multiple positioning holes 630 distributed along the second direction. Thus, the positioning holes 330 and 630 and the positioning posts 220 facilitate the connection and assembly between the connecting busbar 6, the supporting busbar 3 and the capacitor core group 2.

[0067] During assembly, for example Figure 2 First, multiple capacitor cores 210 are taken and positioned with one of the support busbars 3 using the positioning posts 220 on the capacitor cores 210. Then, they are welded at the electrode terminals 320 on the support busbar 3, forming multiple welding points S1 on the electrode terminals 320. Next, the other side of the multiple capacitor cores 210 is connected to another support busbar 3 in the same way, at which point one of the inner core strips has been formed. Then... Figure 5 As shown, multiple inner core strips prepared above are taken, and multiple connecting busbars 6 are placed on one side of the inner core strips. The positioning pins 220 on the capacitor core 210 are positioned by engaging with the positioning holes 630 on the connecting busbars 6. Welding is then performed at the connecting terminals 620 on the connecting busbars 6 to form multiple welding points S2. The other side of the inner core strip is connected to the multiple connecting busbars 6 in the same manner. At this point, the capacitor core assembly 2 has been completed. All the supporting busbars 3 and the connecting busbars 6 on the capacitor core assembly 2 form a stress-relieving mesh structure, thereby reducing the stress transmitted to the welding points S1 and S2.

[0068] In the specific example, the positioning post 220 is made of plastic. Each capacitor core 210 is formed by winding a metallized film, with the positioning post 220 serving as the axis during winding. The metallized film is wound around the positioning post 220, starting from the positioning post 220. Therefore, the positioning post 220 runs through the entire height of the capacitor core 210 and extends to the two end electrodes of the capacitor core 210.

[0069] Then as Figure 6 As shown, the supporting busbar 3 on the capacitor core assembly 2 is welded to two lead busbars 4. The welding is located in the welding area 410 where each supporting busbar 3 and lead busbar 4 overlaps. The two lead busbars 4 constitute the positive and negative terminals of the capacitor. At this point, the internal components of the capacitor are assembled. The assembled part is then placed into the receiving cavity 110 of the housing 1 and fixed with clamps, etc. Then, the filler 5 is filled into the receiving cavity 110 of the housing 1. The filler 5 is fully distributed between the capacitor core assembly 2, the supporting busbar 3, and the connecting busbar 6. When the housing 1 is added, the filler 5 in the receiving cavity 110 is cured. The filler 5 can be a filling resin. Thus, after the filler 5 is cured, the capacitor is completed. Inside the housing 1, the capacitor core assembly 2, the supporting busbar 3, the connecting busbar 6, and the lead busbar 4 are covered by the filler 50 for protection, so as to avoid the effects of moisture and impact.

[0070] According to this embodiment, the following effects are achieved: By adopting a curved strip-shaped solid structure for the electrode terminals and connecting terminals, stress can be absorbed through elastic deformation during temperature changes or vibrations, automatically releasing stress, avoiding cracking of the welding points, and improving the fatigue resistance of the module; the connecting busbar 6 connects the inner core strips along the second direction to form a mesh-like whole, improving structural strength, reducing damage caused by uneven stress on individual cores, and reducing stress transmitted to the welding point S1, effectively solving the problem of weld point detachment caused by stress concentration in the inner core; the main body of the supporting busbar 3 and the connecting busbar 6 is provided with positioning holes, which cooperate with the positioning posts of the core end face electrodes to achieve rapid alignment, reduce human error, and facilitate welding of the ends of the electrode terminals and connecting terminals.

[0071] Example 2

[0072] The structure and principle of this embodiment are roughly the same as those of the previous embodiment, and the similarities will not be described in detail. The difference lies in the combination... Figure 7The electrode terminals 320 on the support busbar 3 extend from the edge of the first side 311 of the main body 310 to the left (or from the edge of the second side 312 of the main body 310 to the right) as two slender strip-shaped entities. The two strip-shaped entities are closely spaced at the position of the first side 311. After extending a certain length, the two strip-shaped entities simultaneously bend and extend in a first direction (where the strip-shaped entity on the first side faces upward and the strip-shaped entity on the second side faces downward) to form one strip-shaped entity close to the inside of the slot 313 and the other strip-shaped entity close to the outside of the slot 313. Then, the strip-shaped entity close to the inside of the slot 313 extends to the left (or right) to a position flush with the opening of the slot 313. The end of the extended strip-shaped entity is used for welding to the end face electrode of the capacitor core 210. It can be seen that the structural design of the electrode terminal 320 allows the welding point S1 to deform to a certain extent in the X (left-right), Y (front-back), and Z (up-down) directions to release the stress at the welding point S1.

[0073] Similarly, the connection terminal 620 of the connection busbar 6 in this embodiment can be designed in the same way as the electrode terminal 320 described above, and will not be described in detail here.

[0074] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0075] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0076] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0077] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0078] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0079] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A capacitor, characterized in that, include: The shell has a receiving cavity; A capacitor core assembly is disposed within the receiving cavity and has multiple capacitor cores, wherein at least three of the multiple capacitor cores are arranged in a first direction and at least one is arranged in a second direction perpendicular to the first direction; At least two support busbars, wherein at least one of the support busbars is connected to a first end face electrode of the plurality of capacitor cores, and at least one of the support busbars is connected to a second end face electrode of the plurality of capacitor cores; the support busbar has a body and a plurality of electrode terminals, the body extends along a first direction and has opposing first and second sides, the plurality of electrode terminals are spaced apart along the first direction on the first and second sides of the body, each electrode terminal is at least two spaced-apart curved strip entities extending from the body, and the ends of the plurality of strip entities of each electrode terminal are welded together to the end face electrode of the corresponding capacitor core to form a welding point covering the ends of the plurality of strip entities; A lead-out busbar is connected to the support busbar to draw out the power of the capacitor core assembly; The filler is filled into the cavity and solidifies within the cavity; It also includes connecting busbars; The plurality of capacitor cores are arranged in a rectangular array along the first direction and the second direction, with the number of columns in the first direction being ≥2 and the number of rows in the second direction being ≥2; The support busbar includes a first support busbar and a second support busbar; the first end face electrodes of each column of capacitor cores are welded through the first support busbar, and the second end face electrodes of each column of capacitor cores are welded through the second support busbar, together forming an inner core strip extending along the first direction; Along the second direction, the first support busbars and / or the second support busbars of adjacent inner core bars are welded together through the connecting busbars, so that the capacitor core group as a whole forms a mesh structure; Positioning holes are provided on the main body of the supporting busbar and the connecting body of the connecting busbar. Positioning posts that cooperate with the positioning holes are provided on the end electrode of the capacitor core. By the engagement of the positioning holes and the positioning posts, the positioning of the supporting busbar and the capacitor core, as well as the positioning of the connecting busbar and the supporting busbar, can be realized.

2. The capacitor as claimed in claim 1, characterized in that, Each electrode terminal has two strip-shaped entities, and the two strip-shaped entities have different bending directions.

3. The capacitor as claimed in claim 1, characterized in that, Each of the electrode terminals has one or more bends in its strip-shaped structure.

4. The capacitor as claimed in claim 1, characterized in that, In the same support busbar, the end face electrode of each capacitor core is connected to an electrode terminal located on the first side of the main body and an electrode terminal located on the second side of the main body.

5. The capacitor as claimed in claim 4, characterized in that, The first and second sides of the main body are provided with multiple slots, each slot corresponding to an electrode terminal, and the strip-shaped entity of each electrode terminal extends from the bottom edge of the corresponding slot.

6. The capacitor as claimed in claim 1, characterized in that, The connecting busbar has a connecting body and multiple connecting terminals. The bodies of the first supporting busbar and the second supporting busbar extend along the first direction, and the connecting body of the connecting busbar extends along the second direction.

7. The capacitor as claimed in claim 6, characterized in that, The connecting terminals are welded to the main body of the first support busbar and / or the main body of the second support busbar. Each connecting terminal is at least two spaced-apart curved strip entities extending from the connecting body. The ends of the strip entities of each connecting terminal are welded to the corresponding main body of the first support busbar and / or the main body of the second support busbar to form a welding point.

8. The capacitor as claimed in claim 1, characterized in that, Each capacitor core has a positioning post on its end electrode, and the main body of the first supporting busbar and / or the main body of the second supporting busbar are provided with a plurality of positioning holes along the first direction, and the connecting body of the connecting busbar is provided with a plurality of positioning holes along the second direction.

9. The capacitor as claimed in claim 1, characterized in that, The positioning post is made of plastic.

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