A capacitor and an electric vehicle

Abstract

The application discloses a capacitor and an electric vehicle. The capacitor comprises a capacitor core group, wherein the capacitor core group comprises a plurality of array-arranged capacitor cores; each capacitor core comprises an electrode, and the electrode comprises a first electrode and a second electrode with opposite polarities; each capacitor core comprises oppositely arranged first and second surfaces; the first surface comprises at least two first electrodes; the second surface comprises at least two second electrodes; and the electrodes of the capacitor cores in the same row are arranged in the same way. The extension direction of the connection line between the first electrode and the second electrode in the same capacitor core intersects with a first direction; and the first direction is the direction in which the first surface is vertically directed to the second surface. The relative position relationship between the first electrode and the second electrode in the same capacitor core is reasonably arranged, the uniformity of current transmission in the capacitor core is improved, the compactness of the capacitor core arrangement is ensured, the space occupation area is reduced, and the power density is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic equipment, and in particular to a capacitor and an electric vehicle. BACKGROUND

[0002] In recent years, with the development and popularization of new energy vehicles, the thin film capacitor used for supporting DC voltage in the inverter for motor driving has become one of the important components that cannot be ignored, and its technology has attracted much attention. The thin film capacitor is mainly composed of a copper bar and a capacitor core. As the volume of the vehicle-mounted inverter is continuously reduced and the power density is continuously improved, compact design has become a design trend. SUMMARY

[0003] The present application provides a capacitor and an electric vehicle, which reasonably sets the setting position of the electrode in the capacitor core, thereby saving the gap between adjacent capacitor cores and capacitor cores during the arrangement of the capacitor core, reducing the space, and improving the power density.

[0004] In a first aspect, the present application provides a capacitor, comprising:

[0005] a capacitor core group, the capacitor core group comprising a plurality of array-arranged capacitor cores, the capacitor core comprising an electrode, the electrode comprising a first electrode and a second electrode with opposite polarities, the capacitor core comprising at least a first surface and a second surface arranged oppositely,

[0006] the first surface comprising at least two first electrodes, the second surface comprising at least two second electrodes, the electrode arrangement mode of the capacitor cores in the same row being the same;

[0007] the extension direction of the connecting line between the first electrode and the second electrode in the same capacitor core intersects with a first direction;

[0008] wherein the first direction is the direction in which the first surface is vertically directed to the second surface.

[0009] Optionally, the first surfaces of the capacitor cores in adjacent rows are arranged adjacently, or the second surfaces of the capacitor cores in adjacent rows are arranged adjacently.

[0010] Optionally, the first electrodes in adjacent first surfaces are arranged staggeredly, or the second electrodes in adjacent second surfaces are arranged staggeredly.

[0011] Optionally, the capacitor further comprises a copper bar, the copper bar being located on one side of the capacitor core, and the copper bar being connected and arranged with the capacitor core.

[0012] Optionally, the copper bar comprises a first sub-copper bar, an insulating layer and a second sub-copper bar arranged in sequence, the polarities of the first sub-copper bar and the second sub-copper bar being opposite.

[0013] Optionally, when the first electrode and the first sub-copper row are of the same polarity, the second electrode and the second sub-copper row are of the same polarity, the first electrode and the first sub-copper row are electrically connected through a first copper row connecting via, and the second electrode and the second sub-copper row are electrically connected through a second copper row connecting via.

[0014] Or, when the first electrode and the second sub-copper row are of the same polarity, the second electrode and the first sub-copper row are of the same polarity, the first electrode and the second sub-copper row are electrically connected through a third copper row connecting via, and the second electrode and the first sub-copper row are electrically connected through a fourth copper row connecting via.

[0015] Optionally, a first copper row connecting structure is arranged between adjacent first electrodes on the same first surface, a second copper row connecting structure is arranged between adjacent second electrodes on the same second surface, and the extension direction of the first copper row connecting structure and the extension direction of the second copper row connecting structure both intersect the first direction.

[0016] Optionally, the capacitor further comprises a heat-conducting substrate, which is located on the side of the copper row away from the capacitor core group.

[0017] Optionally, the capacitor further comprises a casing, and the surface of the heat-conducting substrate on the side away from the capacitor core at least partially contacts the casing along the first direction.

[0018] In a second aspect, the embodiments of the present application further provide an electric vehicle comprising the capacitor of any one of the first aspect.

[0019] The technical scheme of the embodiments of the present application provides a capacitor, which comprises: a capacitor core group, the capacitor core group comprising a plurality of array-arranged capacitor cores, the capacitor core comprising an electrode, the electrode comprising a first electrode and a second electrode of opposite polarity, the capacitor core comprising oppositely arranged first and second surfaces, the first surface comprising at least two first electrodes, the second surface comprising at least two second electrodes, and the electrodes of the capacitor cores in the same row being arranged in the same way; the extension direction of the connection line between the first electrode and the second electrode in the same capacitor core intersects the first direction; and the first direction is the direction in which the first surface is vertically directed to the second surface. The relative position relationship of the first electrode and the second electrode in the same capacitor core is reasonably arranged, the uniformity of current transmission in the capacitor core is improved, the compactness of the capacitor core arrangement is ensured, the space occupation area is reduced, and the power density is improved.

[0020] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative effort based on these drawings.

[0022] Figure 1 A structural schematic diagram of a capacitor provided by an embodiment of the present application is shown in FIG. 1.

[0023] Figure 2 A structural schematic diagram of a capacitor provided by an embodiment of the present application is shown in FIG. 1. Figure 1 A sectional structural schematic diagram along sectional line A-A' is shown in FIG. 2.

[0024] Figure 3 A structural schematic diagram of another capacitor provided by an embodiment of the present application is shown in FIG. 3.

[0025] Figure 4 A structural schematic diagram of another capacitor provided by an embodiment of the present application is shown in FIG. 3. Figure 3 A sectional structural schematic diagram along sectional line B-B' is shown in FIG. 4.

[0026] Figure 5 A structural schematic diagram of an electric vehicle provided by an embodiment of the present application is shown in FIG. 5. DETAILED DESCRIPTION

[0027] In order to make the person skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments only constitute some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of the present application.

[0028] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0029] Figure 1A structural schematic diagram of a capacitor provided for an embodiment of the present application, Figure 2 For Figure 1 A cross-sectional structural schematic diagram along the cross-sectional line A-A', Figure 3 A structural schematic diagram of another capacitor provided for an embodiment of the present application, Figure 4 For Figure 3 A cross-sectional structural schematic diagram along the cross-sectional line B-B', as Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the capacitor 100 comprises: a capacitor core group 101, the capacitor core group 101 comprises a plurality of array-arranged capacitor cores 102, the capacitor core 102 comprises an electrode 103, the electrode 103 comprises a first electrode 1031 and a second electrode 1032 with opposite polarities, the capacitor core 102 comprises at least a first surface 104 and a second surface 105 arranged oppositely, the first surface 104 comprises at least two first electrodes 1031, the second surface 105 comprises at least two second electrodes 1032, and the electrode arrangement mode of the capacitor core 102 in the same row is the same; the extension direction (such as the Y direction in the figure) of the connecting line between the first electrode 1031 and the second electrode 1032 in the same capacitor core 102 intersects with the first direction (such as the X direction shown in the figure); wherein the first direction X is the direction in which the first surface 104 is vertically directed to the second surface 105.

[0030] Among them, the capacitor 100 comprises the capacitor core group 101, the capacitor core group 101 comprises a plurality of array-arranged capacitor cores 102, the capacitor core group 101 is exemplarily displayed in a 2-row 3-column arrangement mode of the capacitor core 102, the electrode arrangement mode of each row of capacitor cores 102 is the same, that is, the first surface 104 and the first electrode 1031 are located on the same side, and the second surface 105 and the second electrode 1032 are located on the same side, in order to ensure the normal work of the capacitor 100, exemplarily, as Figure 1As shown, the first surface 104 of the first row of the capacitor core 102 and the first surface 104 of the second row of the capacitor core 102 are arranged adjacently, that is, the first electrode 1031 of the first row of the capacitor core 102 and the first electrode 1031 of the second row of the capacitor core 102 are arranged adjacently, and the extension direction Y of the connection line between the first electrode 1031 and the second electrode 1032 in the same capacitor core 102 intersects the first direction X, that is, the first electrode 1031 and the second electrode 1032 in the same capacitor core 102 are not arranged oppositely in the first direction X, but are arranged oppositely staggered in the same capacitor core 102, so that for the corresponding first electrode 1031 and the second electrode 1032, the distance between the first electrode 1031 and the second electrode 1032 is greater than the distance between the first surface 104 and the second surface 105 in the first direction, so as to ensure the uniformity of the current passing through the capacitor core 102 and ensure the use effect of the capacitor core 102. At the same time, since the first surface 104 of the first row of the capacitor core 103 and the first surface 104 of the second row of the capacitor core 102 are arranged adjacently, and the first electrode 1031 and the second electrode 1032 in the capacitor core 102 are arranged oppositely staggered, the gap between the adjacent rows of the capacitor core can be reduced, and the overall volume of the capacitor 100 can be reduced.

[0031] The embodiment of the application provides a capacitor, which comprises a capacitor core group, the capacitor core group comprises a plurality of array-arranged capacitor cores, the capacitor core comprises first electrodes and second electrodes with opposite polarities, the capacitor core comprises oppositely arranged first surfaces and second surfaces, the first surface comprises at least two first electrodes, the second surface comprises at least two second electrodes, and the electrode arrangement mode of the capacitor cores in the same row is the same; the extension direction of the connection line between the first electrode and the second electrode in the same capacitor core intersects the first direction, the relative position relationship between the first electrode and the second electrode in the same capacitor core is reasonably arranged, the uniformity of current transmission in the capacitor core is improved, the compactness of the capacitor core arrangement is ensured, the space occupation area is reduced, and the power density is improved.

[0032] Optionally, continuing to refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the first surfaces 104 of the capacitor cores 102 in adjacent rows are arranged adjacently, or the second surfaces 105 of the capacitor cores 102 in adjacent rows are arranged adjacently.

[0033] The electrode arrangement of each row of the capacitor core 102 is the same, the electrode arrangement of the connected rows of the capacitor core 102 can be the same or different, the arrangement of the capacitor core 103 in the same row of the capacitor core is the same, that is, the first surface 104 and the first electrode 1031 are located on the same side, and the second surface 105 and the second electrode 1032 are located on the same side, the first surface 104 of the first row of the capacitor core 102 and the first surface 104 of the second row of the capacitor core 102 are arranged adjacent to each other, that is, the first electrode 1031 of the first row of the capacitor core 102 and the first electrode 1031 of the second row of the capacitor core 102 are arranged adjacent to each other, to avoid the risk of short circuit between adjacent rows of the capacitor core. Similarly, the second surface 105 of the first row of the capacitor core 102 and the second surface 105 of the second row of the capacitor core can also be arranged adjacent to each other, that is, the second electrode 1032 of the first row of the capacitor core 102 and the second electrode 1032 of the second row of the capacitor core 102 are arranged adjacent to each other, to avoid the risk of short circuit between adjacent rows of the capacitor core.

[0034] Optionally, with reference to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the first electrodes 1031 in the adjacent first surfaces 104 are arranged staggered; or, the second electrodes 1032 in the adjacent second surfaces 105 are arranged staggered.

[0035] Optionally, with reference to Figure 1 , the adjacent first surfaces 104 of the first row of the capacitor core and the second row of the capacitor core are arranged adjacent to each other, and at the same time, the first electrodes 1031 on the first row of the capacitor core and the first electrodes 1031 on the second row of the capacitor core are arranged relatively staggered, that is, after the first row of the capacitor core is fixedly connected with the copper bar and after the second row of the capacitor core is fixedly connected with the copper bar, the first row of the capacitor core and the second row of the capacitor core are assembled, and due to the staggered arrangement of the first electrodes 1031 in the adjacent first surfaces 104, the gap between the adjacent rows of the capacitor core is effectively reduced, and the overall volume of the capacitor 100 is reduced. Similarly, as shown in Figure 3 , the adjacent second surfaces 105 of the first row of the capacitor core and the second row of the capacitor core are arranged adjacent to each other, and at the same time, the second electrodes 1032 on the first row of the capacitor core and the second electrodes 1032 on the second row of the capacitor core are arranged relatively staggered, that is, after the first row of the capacitor core is fixedly connected with the copper bar and after the second row of the capacitor core is fixedly connected with the copper bar, the first row of the capacitor core and the second row of the capacitor core are assembled, and due to the staggered arrangement of the second electrodes 1032 in the adjacent second surfaces 105, the gap between the adjacent rows of the capacitor core is effectively reduced, and the overall volume of the capacitor 100 is reduced.

[0036] Optionally, with reference to Figure 2 and Figure 4The capacitor 100 further comprises a copper bar 106 located on one side of the capacitor core 102 and connected with the capacitor core 102.

[0037] The capacitor 100 further comprises a copper bar 106 located on one side of the capacitor core 102 and connected with the capacitor core 102.

[0038] Optionally, with reference to Figure 2 and Figure 4 , the copper bar 106 comprises a first sub-copper bar 1061, an insulating layer 1062 and a second sub-copper bar 1063 arranged in sequence, and the polarities of the first sub-copper bar 1061 and the second sub-copper bar 1063 are opposite.

[0039] The copper bar 106 comprises the first sub-copper bar 1061 and the second sub-copper bar 1063, and the polarities of the first sub-copper bar 1061 and the second sub-copper bar 1063 are opposite, i.e., the first sub-copper bar 1061 and the second sub-copper bar 1063 are positive or negative copper bars, which can be selected according to actual design requirements, and the embodiments of the present application are not limited in this regard. In order to avoid the first sub-copper bar 1061 and the second sub-copper bar 1063 from being short-circuited due to different polarities, an insulating layer 1062 is usually arranged between the first sub-copper bar 1061 and the second sub-copper bar 1063 to ensure normal operation of the copper bar 106. The copper bar 106 is located on the side of the capacitor core 102 close to the heat-conducting substrate 109, so that the heat conducted on the capacitor core 102 can be conducted to the heat-conducting substrate 109 through the copper bar 106, and the heat dissipation effect of the capacitor core 102 is ensured.

[0040] Optionally, with reference to Figure 1 , Figure 2 , Figure 3 and Figure 4 , when the first electrode 1031 and the first sub-copper bar 1061 have the same polarity, and the second electrode 1032 and the second sub-copper bar 1063 have the same polarity, the first electrode 1031 and the first sub-copper bar 1061 are electrically connected through a first copper bar connecting via 11, and the second electrode 1032 and the second sub-copper bar 1063 are electrically connected through a second copper bar connecting via;

[0041] Or, when the first electrode 1031 and the second sub-copper row 1063 have the same polarity, the second electrode 1032 and the first sub-copper row 1061 have the same polarity, the first electrode 1031 and the second sub-copper row 1063 are electrically connected through the third copper row connection via hole, and the second electrode 1032 and the first sub-copper row 1061 are electrically connected through the fourth copper row connection via hole 14.

[0042] Wherein, the capacitor core group 101 includes a plurality of capacitor cores 102, the first electrode 1031 and the second electrode 1032 of the plurality of capacitor cores 102 are respectively connected with the first sub-copper row 1061 and the second sub-copper row 1063 in the copper row 106, when the first electrode 1031 in the capacitor core 102 and the first sub-copper row 1061 have the same polarity, the second electrode 1032 in the capacitor core 102 and the second sub-copper row 1063 have the same polarity, since the first sub-copper row 1061 is located on the side of the second sub-copper row 1063 away from the capacitor core 102, at this time the first electrode 1031 needs to be electrically connected with the first sub-copper row 1061 through the first copper row connection via hole 11, and the second electrode 1032 needs to be electrically connected with the second sub-copper row 1063 through the second copper row connection via hole (not shown in the figure), at this time the aperture size of the first copper row connection via hole 11 is smaller than the aperture size of the second copper row connection via hole, to ensure that the first electrode 1031 will not contact the second sub-copper row 1063 during the connection process with the first sub-copper row 1061, and to ensure short circuit phenomenon; similarly, when the first electrode 1031 of the capacitor core 102 and the second sub-copper row 1063 have the same polarity, the second electrode 1032 of the capacitor core 102 and the first sub-copper row 1061 have the same polarity, since the second sub-copper row 1063 is located on the side of the first sub-copper row 1061 close to the capacitor core 102, at this time the first electrode 1031 of the capacitor core 102 needs to be electrically connected with the second sub-copper row 1063 through the third copper row connection via hole (not shown in the figure), and the second electrode 1032 of the capacitor core 102 is electrically connected with the first sub-copper row 1061 through the fourth copper row connection via hole 12, at this time the aperture size of the third copper row connection via hole is larger than the aperture size of the fourth copper row connection via hole 12, to ensure that the second electrode 1032 will not contact the second sub-copper row 1063 during the connection process with the first sub-copper row 1061, and to avoid short circuit phenomenon, affecting the use of the capacitor 100.

[0043] Optionally, continuing to refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the first copper row connection structure 107 is arranged between the adjacent first electrodes 1031 on the same first surface 104, the second copper row connection structure 108 is arranged between the adjacent second electrodes 1032 on the same second surface 105, and the extension direction (such as the Z direction shown in the figure) of the first copper row connection structure 107 and the extension direction Z of the second copper row connection structure 108 are both intersected with the first direction.

[0044] In the capacitor 100, the first electrode 1031 and the second electrode 1032 of each capacitor core 102 are connected to the copper bar 106 through soldering. However, when the capacitor 100 is subjected to stress due to thermal expansion or contraction, the connection between the copper bar 106 and the first electrode 1031 or the second electrode 1032 of the capacitor core 102 may be damaged due to stress, causing the soldering to fall off and affecting the normal use of the capacitor 100. Therefore, the first copper bar connecting structure 107 is arranged between the adjacent first electrodes 1031 on the same first surface 104, and the extension direction Z of the first copper bar connecting structure 107 is perpendicular to the first direction. The width and length of the first copper bar connecting structure 107 can be set according to the distance between the adjacent first electrodes 1031. The first copper bar connecting structure 107 is an integral structure with the copper bar 106, so that the external stress can be absorbed by the first copper bar connecting structure 107 during soldering between the adjacent first electrodes 1031, thereby ensuring the durability between the first electrode 1031 and the copper bar 106. Similarly, the second copper bar connecting structure 108 is arranged between the adjacent second electrodes 1032 on the same second surface 105, and the extension direction Z of the second copper bar connecting structure 108 is perpendicular to the first direction. The width and length of the second copper bar connecting structure 108 can be set according to the distance between the adjacent second electrodes 1032. The second copper bar connecting structure 108 is an integral structure with the copper bar 106, so that the external stress can be absorbed by the second copper bar connecting structure 108 during soldering between the adjacent second electrodes 1032, thereby ensuring the durability between the second electrode 1032 and the copper bar 106. In the assembly process of the capacitor core 102, the connection between the adjacent first electrodes 1031 on the first surface 104 and the first copper bar connecting structure 107 in each capacitor core 102, and the connection between the adjacent second electrodes 1032 on the second surface 105 and the second copper bar connecting structure 108 in each capacitor core 102 are achieved through soldering, and can be produced by the same soldering tool. As shown in FIGS. 1, 2 and 3, the capacitor 100 is assembled after the soldering connection between each capacitor core 102 and the first copper bar connecting structure 107 and between each capacitor core 102 and the second copper bar connecting structure 108 is completed. The capacitor 100 is assembled by arranging the capacitor cores 102 on the same surface, and then connecting the first copper bar connecting structure 107 and the second copper bar connecting structure 108. Figure 1 and Figure 3 as shown in FIGS. 1, 2 and 3, even if the capacitor 100 is subjected to stress due to thermal expansion or contraction, the first copper bar connecting structure 107 and the second copper bar connecting structure 108 can absorb the external stress, thereby ensuring the durability between the first electrode 1031 and the copper bar 106 and between the second electrode 1032 and the copper bar 106. Figure 1With the capacitor core 102 in its current state, rotate it 180° to become... Figure 3 Even with the capacitor core 102 in its current state, the capacitor 100 can still be assembled and function normally, thus giving the capacitor core 102 a certain degree of error prevention, effectively reducing the assembly difficulty for assembly personnel, and improving production efficiency and output.

[0045] Optional, continue to refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The capacitor 100 also includes a thermally conductive substrate 109, which is located on the side of the copper busbar 106 away from the capacitor core assembly 101.

[0046] The capacitor 100 is also provided with a thermally conductive substrate 109 located between the copper busbar 106 and the housing 110. The thermally conductive substrate 109 can insulate the capacitor core 102 from the housing 110. At the same time, the heat generated by the capacitor core 102 during operation is transferred sequentially through the copper busbar 106 to the thermally conductive substrate 109, and then dissipated through the thermally conductive substrate 109, so as to control the temperature of the capacitor core 102 within the preset range that the material can withstand, and ensure the normal operation of the capacitor core 102.

[0047] Optional, continue to refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The capacitor 100 also includes a housing 110, and along a first direction, the surface of the thermally conductive substrate 109 on the side away from the capacitor core 102 is at least partially in contact with the housing 110.

[0048] The housing 110 serves to protect the capacitor core 102 in the capacitor 100. Simultaneously, the housing 110 has a low temperature and can act as a cold source, contributing to heat dissipation. The housing 110 includes at least a bottom surface and three side surfaces. However, in the first direction X, the bottom surface of the housing 110 contacts the surface of the thermally conductive substrate 109 away from the capacitor core 102, allowing heat transferred through the thermally conductive substrate 109 to be conducted away through the housing 110, ensuring effective heat dissipation. Since the housing 110 is typically made of metal, the positive or negative electrode of the capacitor core 102, the copper busbar 106, does not directly contact the housing 110, thus ensuring the normal operation of the capacitor 100.

[0049] Figure 5 This is a schematic diagram of the structure of an electric vehicle provided in an embodiment of the present invention, such as... Figure 5 The electric vehicle 200 includes the capacitor 100 described in any of the above embodiments.

[0050] It should be noted that the electric vehicle 200 provided by the embodiment has the same or corresponding beneficial effects as the capacitor 100 provided by the embodiment of the application, and details are not repeated here.

[0051] The above detailed description does not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A capacitor characterized by, The capacitor comprises: a capacitor core group comprising a plurality of array-arranged capacitor cores, each capacitor core comprising electrodes, the electrodes comprising first electrodes and second electrodes with opposite polarities, the capacitor core comprising oppositely arranged first surfaces and second surfaces, the first surface comprising at least two first electrodes, the second surface comprising at least two second electrodes, the electrodes of the capacitor cores in the same row being arranged in the same manner; the extension direction of the lines between the first electrodes and the second electrodes in the same capacitor core intersects with a first direction; wherein the first direction is the direction in which the first surface is vertically directed to the second surface, and the first direction is parallel to the plane formed by the lines between the first electrodes and the second electrodes in each capacitor core.

2. The capacitor of claim 1, wherein The first surfaces of the capacitor cores in adjacent rows are arranged adjacent to each other, or the second surfaces of the capacitor cores in adjacent rows are arranged adjacent to each other.

3. The capacitor of claim 2, wherein The first electrodes in adjacent first surfaces are arranged staggered, or the second electrodes in adjacent second surfaces are arranged staggered.

4. The capacitor of claim 1, wherein The capacitor further comprises a copper bar, the copper bar being located on one side of the capacitor core group, and the copper bar being arranged in connection with the capacitor core.

5. The capacitor of claim 4, wherein The copper bar comprises a first sub-copper bar, an insulating layer and a second sub-copper bar arranged in sequence, the first sub-copper bar and the second sub-copper bar being opposite in polarity.

6. The capacitor of claim 5, wherein When the first electrodes and the first sub-copper bar are of the same polarity, and the second electrodes and the second sub-copper bar are of the same polarity, the first electrodes and the first sub-copper bar are electrically connected through first copper bar connecting vias, and the second electrodes and the second sub-copper bar are electrically connected through second copper bar connecting vias; or, when the first electrodes and the second sub-copper bar are of the same polarity, and the second electrodes and the first sub-copper bar are of the same polarity, the first electrodes and the second sub-copper bar are electrically connected through third copper bar connecting vias, and the second electrodes and the first sub-copper bar are electrically connected through fourth copper bar connecting vias.

7. The capacitor of claim 6, wherein A first copper bar connecting structure is arranged between the adjacent first electrodes located on the same first surface, and a second copper bar connecting structure is arranged between the adjacent second electrodes located on the same second surface, the extension direction of the first copper bar connecting structure and the extension direction of the second copper bar connecting structure both intersect with the first direction.

8. The capacitor of claim 4, wherein The capacitor further comprises a heat-conducting substrate, the heat-conducting substrate being located on the side of the copper bar away from the capacitor core group.

9. The capacitor of claim 8, wherein The capacitor further comprises a casing, and along the first direction, the surface of the heat-conducting substrate away from the capacitor core group is at least partially in contact with the casing.

10. An electric vehicle, characterized by The capacitor comprises any one of claims 1-9.

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