Capacitor core group and capacitor

Abstract

The invention provides a capacitor core group and a capacitor, and relates to the technical field of electronic components, the capacitor core group comprises a first electrode, a second electrode and a plurality of single core groups, each single core group comprises a first connecting piece, a second connecting piece and a plurality of capacitor elements, one ends of the plurality of capacitor elements are connected through the first connecting piece, and the other ends of the plurality of capacitor elements are connected through the second connecting piece; the other ends of the capacitor elements are connected through a second connecting piece to form parallel connection of the plurality of capacitor elements; the first connecting pieces of the plurality of single-core groups are respectively connected to the first electrode, and the second connecting pieces of the plurality of single-core groups are respectively connected to the second electrode, so that the plurality of single-core groups are connected in parallel. Thus, a current path is dispersed while inductance is reduced in a double parallel connection mode, so that current flows from an upper-layer element to a lower-layer element at high frequency, the current sharing degree of the capacitor is improved, the current of the capacitor is prevented from being excessively concentrated, local heating and heat concentration can be reduced, and the service life of the capacitor is prolonged. And the capacitor can meet the temperature rise requirement.

Description

Technical Field

[0001] This invention relates to the field of electronic components technology, and more specifically, to a capacitor core assembly and a capacitor. Background Technology

[0002] As a core component of converters, thin-film capacitors play a crucial role in the system. Meanwhile, as the switching frequency of switching devices increases, the requirements for the resonant frequency of capacitors also become more stringent.

[0003] Currently, for conventional capacitors, a higher resonant frequency means more concentrated heat generation and a higher hotspot temperature, leading to higher hotspot temperatures across the entire system and impacting the lifespan of both the capacitor and the system. Furthermore, at high frequencies, current struggles to flow from the top layer to the bottom, reaching at most the second layer, forcing the top layer to handle approximately 70% of the current. This also results in excessive current concentration within the capacitor, causing localized and concentrated heat generation that fails to meet temperature rise requirements. Summary of the Invention

[0004] The problem this invention addresses is how to prevent excessive current concentration in capacitors.

[0005] To address the above problems, the present invention provides a capacitor core assembly and a capacitor.

[0006] In a first aspect, the present invention provides a capacitor core assembly, including a first electrode, a second electrode, and a plurality of single-core assemblies. Each single-core assembly includes a first connector, a second connector, and a plurality of capacitor elements. One end of each of the plurality of capacitor elements is connected to the first connector, and the other end is connected to the second connector to form a parallel connection of the plurality of capacitor elements. The first connectors of the plurality of single-core assemblies are respectively connected to the first electrode, and the second connectors of the plurality of single-core assemblies are respectively connected to the second electrode to form a parallel connection of the plurality of single-core assemblies.

[0007] Optionally, in each single-core assembly, the plurality of capacitor elements are divided into a first capacitor group and a second capacitor group; the first connector includes a first connecting piece and a third connecting piece, the second connector includes a second connecting piece and a fourth connecting piece, one end of the plurality of capacitor elements in the first capacitor group is connected through the first connecting piece and the other end is connected through the second connecting piece, one end of the plurality of capacitor elements in the second capacitor group is connected through the third connecting piece and the other end is connected through the fourth connecting piece.

[0008] Optionally, the first connecting piece and the third connecting piece are symmetrically arranged, and / or the second connecting piece and the fourth connecting piece are symmetrically arranged.

[0009] Optionally, the overlap between the first connecting piece and the third connecting piece is greater than or equal to 50%, and / or the overlap between the second connecting piece and the fourth connecting piece is greater than or equal to 50%.

[0010] Optionally, the first connecting piece includes a first connecting portion, a first bent portion, and a second bent portion connected in sequence. One end of one of the plurality of capacitor elements in the first capacitor group is connected through the first connecting portion. The first bent portion is located on one side of the first connecting portion along a first direction, and the second bent portion is located on one side of the first connecting portion along a second direction and overlaps the first electrode. And / or, the second connecting piece includes a second connecting portion, a third bending portion and a fourth bending portion connected in sequence, the other ends of the plurality of capacitor elements in the first capacitor group are connected through the second connecting portion, the third bending portion is located on one side of the second connecting portion along the first direction, the fourth bending portion is located on one side of the second connecting portion along the second direction and overlaps the second electrode; Wherein, the first direction is perpendicular to the second direction.

[0011] Optionally, the capacitor core assembly further includes an insulating sheet, wherein the first electrode, the insulating sheet, and the second electrode are sequentially stacked on one side of the plurality of single core assemblies, and the second electrode is located on the side of the insulating sheet closer to the single core assembly.

[0012] Optionally, the first electrode has a first insertion portion protruding from it, and the second electrode has a second insertion portion protruding from it. The second insertion portion passes through the insulating sheet and the first electrode, and the first insertion portion and the second insertion portion are located on the side of the first electrode away from the second electrode, and are respectively used to be inserted into the circuit board.

[0013] Optionally, the orthographic projections of the first electrode and the second electrode onto the insulating sheet are located within the outline of the insulating sheet.

[0014] Optionally, the single-core assembly further includes an insulating pressure plate, which is disposed between the second electrode and the corresponding capacitor element of the single-core assembly, and the side of the second electrode away from the insulating sheet is in contact with the insulating pressure plate.

[0015] In a second aspect, the present invention provides a capacitor comprising the capacitor core assembly as described above.

[0016] The beneficial effects of the capacitor core assembly of the present invention are as follows: By connecting one end of multiple capacitor elements in each single core assembly through a first connector and the other end through a second connector to form a parallel connection of multiple capacitor elements in each single core assembly, the magnetic fields generated by the multiple capacitor elements in the single core assembly can cancel each other out, thereby reducing inductance; at the same time, by connecting the first connectors of multiple single core assemblies to the first electrode and the second connectors of multiple single core assemblies to the second electrode to form a parallel connection of multiple single core assemblies, the magnetic fields generated by the multiple single core assemblies can also cancel each other out, thereby further reducing inductance; moreover, by adopting a double parallel connection method of connecting multiple capacitor elements in parallel within a single core assembly and then connecting multiple single core assemblies in parallel, the current path is dispersed, so that the current can flow from the upper element to the lower element at a high frequency, thereby improving the current uniformity of the capacitor, avoiding excessive current concentration in the capacitor, thereby reducing local heating and heat concentration, and ensuring that the capacitor can meet the temperature rise requirements. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the capacitor core assembly in an embodiment of the present invention; Figure 2 This is a schematic diagram of the exploded structure of the capacitor core assembly in an embodiment of the present invention; Figure 3 This is a cross-sectional schematic diagram of the capacitor core assembly in an embodiment of the present invention; Figure 4 for Figure 3 A magnified view of a section at point A in the middle; Figure 5 This is a schematic diagram of the structure of a single-core assembly in an embodiment of the present invention; Figure 6 This is a schematic diagram of the exploded structure of a single core assembly in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. First electrode; 11. First insertion part; 12. First through hole; 2. Second electrode; 21. Second insertion part; 3. Single core assembly; 31. First connector; 311. First connecting piece; 3111. First connecting part; 3112. First bending part; 3113. Second bending part; 312. Third connecting piece; 3121. Third connecting part; 3122. Fifth bending part; 3123. Sixth bending part; 32. Second connector; 321. Second connecting piece; 3211. Second connecting part; 3212. Third bending part; 3213. Fourth bending part; 322. Fourth connecting piece; 3221. Fourth connecting part; 3222. Seventh bending part; 3223. Eighth bending part; 33. Capacitor element; 4. Insulating sheet; 41. Second through hole; 5. Insulating pressure plate. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0020] In the attached figures, the X-axis represents the front-to-back position, with the positive direction of the X-axis representing the front and the negative direction representing the rear. The Y-axis represents the left-to-right position, with the positive direction representing the left and the negative direction representing the right. The Z-axis represents the up-down position, with the positive direction representing the top and the negative direction representing the bottom. It should be noted that the aforementioned representations of the X, Y, and Z axes are for ease of description and simplification of the invention, 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 the invention.

[0021] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this invention are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0022] It should be noted that the terms "a" and "a plurality of" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0023] Combination Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, a capacitor core assembly according to an embodiment of the present invention includes a first electrode 1, a second electrode 2, and a plurality of single-core assemblies 3. Each single-core assembly 3 includes a first connector 31, a second connector 32, and a plurality of capacitor elements 33. One end of each capacitor element 33 is connected to the first connector 31, and the other end is connected to the second connector 32 to form a parallel connection of the capacitor elements 33. The first connectors 31 of the plurality of single-core assemblies 3 are respectively connected to the first electrode 1, and the second connectors 32 of the plurality of single-core assemblies 3 are respectively connected to the second electrode 2 to form a parallel connection of the plurality of single-core assemblies 3.

[0024] Specifically, multiple single-core groups 3 can be arranged along the front-back direction (i.e., Figure 1 The capacitors are arranged in a symmetrical (X-axis direction) configuration. The first electrode 1 and the second electrode 2 can be located on the same side of the multiple single-core groups 3, for example, both on the upper side of the multiple single-core groups 3, or they can be located on different sides of the multiple single-core groups 3, for example, on the upper and lower sides of the multiple single-core groups 3. Within each single-core group 3, when the number of capacitor elements 33 is small, the multiple capacitor elements 33 can be arranged in a single row or column. When the number of capacitor elements 33 is large, the multiple capacitor elements 33 can be arranged in an array, such as a rectangle or a circle; no specific limitation is made here. The capacitor elements 33 are typically film capacitors. Figure 1 The front and rear ends of the component serve as electrode leads, which are electrically connected to the first connector 31 and the second connector 32 by welding, respectively. The first connector 31 and the second connector 32 can be designed as an integral or separate structure depending on the size of the single-core assembly 3 and the distribution of the capacitor elements 33. For example, when the size of the single-core assembly 3 is small or the number of internal capacitor elements 33 is small, the first connector 31 and the second connector 32 can be designed as an integral structure including a connecting piece, meaning that one electrode lead of each capacitor element 33 in the single-core assembly 3 is connected to one connecting piece. Conversely, when the size of the single-core assembly 3 is large or the number of internal capacitor elements 33 is large, the first connector 31 and the second connector 32 can be designed as a separate structure including multiple connecting pieces, meaning that one electrode lead of some capacitor elements 33 in the single-core assembly 3 is connected to one connecting piece, and one electrode lead of other capacitor elements 33 is connected to another connecting piece. In practical applications, the design can be selected according to needs, and no specific limitations are made here.

[0025] In this embodiment, by connecting one end of multiple capacitor elements 33 within each single-core group 3 through a first connector 31 and the other end through a second connector 32, a parallel connection of multiple capacitor elements 33 within each single-core group 3 can be formed, allowing the magnetic fields generated by the multiple capacitor elements 33 within the single-core group 3 to cancel each other out, thereby reducing inductance. Simultaneously, by connecting the first connectors 31 of multiple single-core groups 3 to the first electrode 1 and the second connectors 32 of multiple single-core groups 3 to the second electrode 2, a parallel connection of multiple single-core groups 3 can also be formed, allowing the magnetic fields generated by the multiple single-core groups 3 to cancel each other out, thereby further reducing inductance. Moreover, by employing a double parallel connection method—connecting multiple capacitor elements 33 in parallel within a single-core group 3 and then connecting multiple single-core groups 3 in parallel—the current path is dispersed, allowing current to flow from the upper element to the lower element at a high frequency, thereby improving the current uniformity of the capacitor, preventing excessive current concentration in the capacitor, and thus reducing localized heating and heat concentration, ensuring that the capacitor meets the temperature rise requirements.

[0026] Optionally, combined Figure 5 and Figure 6 As shown, in each single-core group 3, multiple capacitor elements 33 are divided into a first capacitor group and a second capacitor group; the first connector 31 includes a first connecting piece 311 and a third connecting piece 312, and the second connector 32 includes a second connecting piece 321 and a fourth connecting piece 322. One end of the multiple capacitor elements 33 in the first capacitor group is connected to each other through the first connecting piece 311, and the other end is connected through the second connecting piece 321. One end of the multiple capacitor elements 33 in the second capacitor group is connected through the third connecting piece 312, and the other end is connected through the fourth connecting piece 322.

[0027] In this optional embodiment, the first connector 31 and the second connector 32 adopt a split structure. Furthermore, the multiple capacitor elements 33 in each single-core assembly 3 are divided into a first capacitor group and a second capacitor group. The first capacitor group and the second capacitor group are arranged perpendicular to the arrangement direction of the multiple single-core assemblies 3. That is, if the multiple single-core assemblies 3 are arranged in the front-back direction (i.e.,...) Figure 1 If the capacitor banks are arranged in the X-axis direction, then the first and second capacitor banks can be arranged in the left-right direction (i.e., along the X-axis). Figure 1 (in the Y-axis direction) or the up-down direction (i.e.) Figure 1The capacitors are arranged in a Z-axis direction. The number of capacitor elements 33 in the first capacitor group can be the same as or different from the number of capacitor elements 33 in the second capacitor group. When the number is the same, the capacitor elements 33 in the first capacitor group and the capacitor elements 33 in the second capacitor group can be arranged symmetrically from left to right. For example, the single-core group 3 includes twelve capacitor elements 33 arranged in three rows and four columns. The six capacitor elements 33 on the left constitute the first capacitor group, and the six capacitor elements 33 on the right constitute the second capacitor group. That is, the six capacitor elements 33 in the first capacitor group and the six capacitor elements 33 in the second capacitor group are both arranged in three rows and two columns. Furthermore, one end of the capacitor elements 33 in the first capacitor group is connected to the first connecting piece 311 of the first connector 31, and the other end is connected to the second connecting piece 321 of the second connector 32. One end of the capacitor elements 33 in the second capacitor group is connected to the third connecting piece 312 of the first connector 31, and the other end is connected to the fourth connecting piece 322 of the second connector 32. This is equivalent to dividing a long circuit into two parallel circuits, which can not only reduce the loop length, but also further reduce the inductance.

[0028] Optionally, combined Figure 6 As shown, the first connecting piece 311 and the third connecting piece 312 are symmetrically arranged, and / or the second connecting piece 321 and the fourth connecting piece 322 are symmetrically arranged. This ensures that the circuit impedances in the first capacitor bank and the second capacitor bank are consistent, allowing the current to be evenly distributed to each capacitor element 33 within the capacitor bank, further improving the current sharing of the capacitors, thereby ensuring that the capacitors can meet the requirements of high-current, high-frequency operation.

[0029] Optionally, combined Figure 5 and Figure 6 As shown, the overlap between the first connecting piece 311 and the third connecting piece 312 is greater than or equal to 50%, and / or the overlap between the second connecting piece 321 and the fourth connecting piece 322 is greater than or equal to 50%.

[0030] It should be noted that the overlap between the first connecting piece 311 and the third connecting piece 312 refers to the degree of overlap between the first connecting piece 311 and the third connecting piece 312. Figure 1 The overlapping area of ​​the orthographic projections on the XZ plane is the proportion of the area of ​​the entire first connecting piece 311 or the entire third connecting piece 312. Similarly, the overlap between the second connecting piece 321 and the fourth connecting piece 322 refers to the area of ​​the second connecting piece 321 and the fourth connecting piece 322 on the XZ plane. Figure 1 The ratio of the overlapping area of ​​the orthographic projection on the XZ plane to the area of ​​the entire second connecting piece 321 or the entire fourth connecting piece 322.

[0031] Specifically, the orthographic projection of the first connecting piece 311 on the XZ plane is the first bent portion 3112 of the first connecting piece 311 (described later), and the orthographic projection of the third connecting piece 312 on the XZ plane is the fifth bent portion 3122 of the third connecting piece 312 (described later). Similarly, the orthographic projection of the second connecting piece 321 on the XZ plane is the third bent portion 3212 of the second connecting piece 321 (described later), and the orthographic projection of the fourth connecting piece 322 on the XZ plane is the seventh bent portion 3222 of the fourth connecting piece 322 (described later). In other words, the first bending portion 3112 and the fifth bending portion 3122 are arranged facing each other on the left and right sides of the multiple capacitor elements 33 of the single core group 3, and the area of ​​the first bending portion 3112 accounts for at least half of the total area of ​​the entire first connecting piece 311, and the area of ​​the fifth bending portion 3122 accounts for at least half of the total area of ​​the entire third connecting piece 312; the fifth bending portion 3122 and the seventh bending portion 3222 are also arranged facing each other on the left and right sides of the multiple capacitor elements 33 of the single core group 3, and the area of ​​the fifth bending portion 3122 accounts for at least half of the total area of ​​the entire third connecting piece 312, and the area of ​​the seventh bending portion 3222 accounts for at least half of the total area of ​​the entire fourth connecting piece 322.

[0032] In this way, by setting the overlap of the first connecting piece 311 and the third connecting piece 312 to be greater than or equal to 50%, that is, the overlapping area of ​​the orthographic projection of the first connecting piece 311 and the third connecting piece 312 on the XZ plane accounts for at least half of the total area of ​​the first connecting piece 311 or the third connecting piece 312, the coupling between parallel branches is increased, and the current is evenly distributed to all capacitor elements 33 in the single core group 3, thereby further improving the current sharing of the capacitor and ensuring that the capacitor can meet the requirements of high current and high frequency use.

[0033] Optionally, combined Figures 3 to 6 As shown, the first connecting piece 311 includes a first connecting part 3111, a first bending part 3112, and a second bending part 3113 connected in sequence. One end of a plurality of capacitor elements 33 in the first capacitor group is connected through the first connecting part 3111. The first bending part 3112 is located on one side of the first connecting part 3111 along the first direction, and the second bending part 3113 is located on one side of the first connecting part 3111 along the second direction and overlaps the first electrode 1. And / or, the second connecting piece 321 includes a second connecting portion 3211, a third bending portion 3212 and a fourth bending portion 3213 connected in sequence. The other ends of the plurality of capacitor elements 33 in the first capacitor group are connected through the second connecting portion 3211. The third bending portion 3212 is located on one side of the second connecting portion 3211 along the first direction, and the fourth bending portion 3213 is located on one side of the second connecting portion 3211 along the second direction and overlaps the second electrode 2. The first direction is perpendicular to the second direction.

[0034] It should be noted that the first direction is the X-axis direction in the diagram, which is the front-to-back direction, and the second direction is the Z-axis direction in the diagram, which is the up-to-down direction.

[0035] It should also be noted that the third connecting piece 312, which is symmetrically arranged with the first connecting piece 311, includes a third connecting portion 3121, a fifth bending portion 3122, and a sixth bending portion 3123 connected in sequence, and one end of the plurality of capacitor elements 33 in the second capacitor group is connected through the third connecting portion 3121; the fourth connecting piece 322, which is symmetrically arranged with the second connecting piece 321, includes a fourth connecting portion 3221, a seventh bending portion 3222, and an eighth bending portion 3223 connected in sequence, and the other end of the plurality of capacitor elements 33 in the second capacitor group is connected through the fourth connecting portion 3221.

[0036] Specifically, since the two electrode leads of each capacitor element 33 are located at Figure 1 In the X-axis direction, i.e., the front-to-back direction, the first connecting part 3111 and the second connecting part 3211 are located on the front and back sides of the first capacitor group and are facing each other. The third connecting part 3121 and the fourth connecting part 3221 are located on the front and back sides of the second capacitor group and are facing each other. Simultaneously, the first bent part 3112 and the fifth bent part 3122 are located on the left and right sides of the multiple capacitor elements 33 of the single-core group 3 and are facing each other. The third bent part 3212 and the seventh bent part 3222 are located on the left and right sides of the multiple capacitor elements 33 of the single-core group 3 and are facing each other. The first bent part 3112 is located on the side of the third bent part 3212 away from the capacitor element 33 and is in contact with the third bent part 3212. The fifth bent part 3122 is located on the side of the seventh bent part 3212 away from the capacitor element 33 and is in contact with the third bent part 3212. Part 3222 is located away from the capacitor element 33 and is in contact with the seventh bend 3222; the second bend 3113 and the fourth bend 3213 are located on the upper left side of the plurality of capacitor elements 33 in the single core group 3, the sixth bend 3123 and the eighth bend 3223 are located on the upper right side of the plurality of capacitor elements 33 in the single core group 3, and the second bend 3113 is located directly above the fourth bend 3213, and the sixth bend 3123 is located directly above the eighth bend 3223.

[0037] During assembly, the insulating pressure plate 5 (described later) can be placed on the upper end of the multiple capacitor elements 33 of the corresponding single core group 3. Then, the second electrode 2 is stacked on the upper end face of the insulating pressure plate 5. Then, the fourth bend 3213 of the second connecting piece 321 and the eighth bend 3223 of the fourth connecting piece 322 are respectively welded to the left and right edges of the upper end face of the second electrode 2. Then, the insulating sheet 4 and the first electrode 1 are stacked on the upper end of the second electrode 2 in sequence. Then, the second bend 3113 of the first connecting piece 311 and the sixth bend 3123 of the third connecting piece 312 are respectively welded to the left and right edges of the upper end face of the first electrode 1. In this way, the connecting pieces are connected to the electrodes by overlapping the left and right edges of the upper end face of the electrodes, thereby increasing the connection area between the first connecting piece 311 and the third connecting piece 312 and the first electrode 1, and between the second connecting piece 321 and the fourth connecting piece 322 and the second electrode 2, ensuring the stability of the connection. Moreover, by setting the connecting pieces to have a bending structure formed by bending in two different directions, the structural strength of the connecting pieces can be improved, thereby further improving the stability of the connection.

[0038] Optionally, combined Figure 2 and Figure 4 As shown, the capacitor core assembly also includes an insulating sheet 4. The first electrode 1, the insulating sheet 4, and the second electrode 2 are sequentially stacked on one side of the multiple single-core assemblies 3, with the second electrode 2 located on the side of the insulating sheet 4 closest to the single-core assembly 3. In other words, the first electrode 1, the insulating sheet 4, and the second electrode 2 are sequentially stacked from top to bottom at the upper end of the multiple single-core assemblies 3.

[0039] In this way, the insulating sheet 4 can be used to isolate the stacked first electrode 1 and the second electrode 2, avoiding short circuits caused by physical contact between the first electrode 1 and the second electrode 2. Moreover, it is convenient to stack the first electrode 1 and the second electrode 2 on the same side of the single core group 3, making the capacitor core group more compact and reducing the space occupied.

[0040] Optionally, combined Figure 2 and Figure 4 As shown, the first electrode 1 has a first plug-in portion 11 protruding from it, and the second electrode 2 has a second plug-in portion 21 protruding from it. The second plug-in portion 21 passes through the insulating sheet 4 and the first electrode 1. The first plug-in portion 11 and the second plug-in portion 21 are located on the side of the first electrode 1 away from the second electrode 2, and are respectively used to plug into the circuit board.

[0041] Specifically, the first electrode 1 is provided with multiple first insertion portions 11 and multiple first through holes 12, the second electrode 2 is provided with multiple second insertion portions 21, and the insulating sheet 4 is provided with multiple second through holes 41. The number of first through holes 12 is the same as the number of second insertion portions 21, and the multiple first through holes 12 and multiple second through holes 41 are arranged in a one-to-one correspondence. During assembly, the second electrode 2 can be stacked on the insulating pressure plate 5 (described later), and then the first electrode 1 can be stacked on the insulating sheet 4, with the multiple first through holes 12 and multiple second through holes 41 aligned one-to-one. Then, the second insertion portions 21 of the second electrode 2 pass through the second through holes 41 of the insulating sheet 4 and the first through holes 12 of the first electrode 1 sequentially from below the insulating sheet 4, so that the second insertion portions 21 of the second electrode 2 pass through the stacked insulating sheet 4 and the first electrode 1 sequentially.

[0042] This allows the first connector 11 and the second connector 21 to be connected to the circuit board to achieve the connection between the first electrode 1 and the second electrode 2 and the circuit board. The first connector 11 and the second connector 21 can be cylindrical structures, and their upper surfaces are flush.

[0043] Optionally, combined Figure 1 and Figure 3 As shown, the orthographic projections of the first electrode 1 and the second electrode 2 onto the insulating sheet 4 lie within the outline of the insulating sheet 4. The first electrode 1, the second electrode 2, and the insulating sheet 4 are all flat plate structures, and the areas of the first electrode 1 and the second electrode 2 are both smaller than the area of ​​the insulating sheet 4. This ensures that the first electrode 1 and the second electrode 2, which are positioned opposite each other on the upper and lower sides of the insulating sheet 4, will not make physical contact and cause a short circuit, thus ensuring the effectiveness of the capacitor core assembly.

[0044] Optionally, combined Figures 2 to 4 As shown, the capacitor core assembly also includes an insulating plate 5, which is disposed between the second electrode 2 and the capacitor element 33, with the side of the second electrode 2 away from the insulating sheet 4 in contact with the insulating plate 5. In this way, the insulating plate 5 can be used to insulate and isolate the second electrode 2 from the capacitor element 33, preventing direct physical contact between the second electrode 2 and the capacitor element 33 that could lead to a short circuit. The insulating plate 5 can be designed as a single piece, like the insulating sheet 4, in which case it is disposed between the lower end face of the second electrode 2 and the upper end of the capacitor element 33; the insulating plate 5 can also be... Figure 2 The design shown consists of multiple long strips extending in the left-right direction. In this case, the number of long strip-shaped insulating pressure plates 5 is the same as the number of single-core groups 3, and they are arranged in a one-to-one correspondence. In practical applications, the design can be selected according to needs, and no specific limitation is made here.

[0045] A capacitor according to an embodiment of the present invention includes a capacitor core assembly as described above.

[0046] The beneficial effects of the capacitor in this embodiment are the same as those of the capacitor core assembly described above, and will not be repeated here.

[0047] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A capacitor core assembly, characterized in that, The device includes a first electrode (1), a second electrode (2), and multiple single-core groups (3). Each single-core group (3) includes a first connector (31), a second connector (32), and multiple capacitor elements (33). One end of each capacitor element (33) is connected to the first connector (31), and the other end is connected to the second connector (32) to form a parallel connection of the capacitor elements (33). The first connectors (31) of the multiple single-core groups (3) are respectively connected to the first electrode (1), and the second connectors (32) of the multiple single-core groups (3) are respectively connected to the second electrode (2) to form a parallel connection of the multiple single-core groups (3).

2. The capacitor core assembly according to claim 1, characterized in that, In each single-core group (3), a plurality of capacitor elements (33) are divided into a first capacitor group and a second capacitor group; the first connector (31) includes a first connecting piece (311) and a third connecting piece (312), and the second connector (32) includes a second connecting piece (321) and a fourth connecting piece (322). One end of the plurality of capacitor elements (33) in the first capacitor group is connected through the first connecting piece (311), and the other end is connected through the second connecting piece (321). One end of the plurality of capacitor elements (33) in the second capacitor group is connected through the third connecting piece (312), and the other end is connected through the fourth connecting piece (322).

3. The capacitor core assembly according to claim 2, characterized in that, The first connecting piece (311) is symmetrically arranged with the third connecting piece (312), and / or the second connecting piece (321) is symmetrically arranged with the fourth connecting piece (322).

4. The capacitor core assembly according to claim 2, characterized in that, The overlap between the first connecting piece (311) and the third connecting piece (312) is greater than or equal to 50%, and / or the overlap between the second connecting piece (321) and the fourth connecting piece (322) is greater than or equal to 50%.

5. The capacitor core assembly according to claim 2, characterized in that, The first connecting piece (311) includes a first connecting part (3111), a first bending part (3112), and a second bending part (3113) connected in sequence. One end of a plurality of capacitor elements (33) in the first capacitor group is connected through the first connecting part (3111). The first bending part (3112) is located on one side of the first connecting part (3111) along the first direction, and the second bending part (3113) is located on one side of the first connecting part (3111) along the second direction and overlaps the first electrode (1). And / or, the second connecting piece (321) includes a second connecting portion (3211), a third bending portion (3212) and a fourth bending portion (3213) connected in sequence, the other ends of the plurality of capacitor elements (33) in the first capacitor group are connected through the second connecting portion (3211), the third bending portion (3212) is located on one side of the second connecting portion (3211) along the first direction, the fourth bending portion (3213) is located on one side of the second connecting portion (3211) along the second direction, and overlaps the second electrode (2); Wherein, the first direction is perpendicular to the second direction.

6. The capacitor core assembly according to claim 1, characterized in that, It also includes an insulating sheet (4), wherein the first electrode (1), the insulating sheet (4) and the second electrode (2) are stacked sequentially on one side of the plurality of single core groups (3), and the second electrode (2) is located on the side of the insulating sheet (4) close to the single core group (3).

7. The capacitor core assembly according to claim 6, characterized in that, The first electrode (1) has a first plug-in portion (11) protruding, and the second electrode (2) has a second plug-in portion (21) protruding. The second plug-in portion (21) passes through the insulating sheet (4) and the first electrode (1). The first plug-in portion (11) and the second plug-in portion (21) are located on the side of the first electrode (1) away from the second electrode (2) and are respectively used to plug into the circuit board.

8. The capacitor core assembly according to claim 6, characterized in that, The orthographic projections of the first electrode (1) and the second electrode (2) onto the insulating sheet (4) are located within the outline of the insulating sheet (4).

9. The capacitor core assembly according to claim 6, characterized in that, It also includes an insulating plate (5), which is disposed between the second electrode (2) and the capacitor element (33), and the side of the second electrode (2) away from the insulating sheet (4) is in contact with the insulating plate (5).

10. A capacitor, characterized in that, Includes the capacitor core assembly as described in any one of claims 1-9.

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