A capacitor and an electric vehicle
The capacitor design, which uses a cross-arrangement of thermally conductive substrate and copper busbar, solves the heat dissipation problem of capacitors in high-power electric vehicles, achieving effective thermal management and normal operation of the capacitors.
Patent Information
- Application Number
- CN202210973696.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-08-15
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2042-08-15
AI Technical Summary
Existing capacitors are difficult to dissipate heat effectively in high-power electric vehicles, resulting in severe overheating and affecting normal operation.
The design employs a thermally conductive substrate and copper busbar structure, with the copper busbar and capacitor core overlapping. The thermal conduction direction intersects with the electrode direction, and combined with the heat dissipation of the casing, it improves heat dissipation efficiency.
It effectively reduces capacitor temperature, ensures normal operation of capacitors under high current and high power conditions, and improves heat dissipation capacity.
Smart Images
Figure CN115188587B_ABST
Abstract
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] With the development and popularization of new energy electric vehicles at the beginning of this century, the structural design of DC voltage support capacitors, one of the main components in motor drivers, has attracted much attention. As the driving power of new energy electric vehicles continues to rise, the current and voltage of the inverter also continue to increase, which requires the capacitor to withstand increasing ripple current. During the operation of the capacitor, the loss of the capacitor is proportional to the square of the current flowing through the capacitor, and as the ripple current increases, the heat generated by the capacitor also increases in a square relationship. Due to the limitation of the temperature resistance of the material, the temperature that the capacitor can withstand is limited, and the temperature needs to be controlled below a certain temperature through heat dissipation structure. Therefore, a heat dissipation structure is proposed, which can reasonably handle the insulation problem while dissipating heat through copper bars. SUMMARY
[0003] The present application provides a capacitor and an electric vehicle to improve the heat dissipation capacity of the capacitor and meet the application requirements of the capacitor to adapt to large current and high power.
[0004] In a first aspect, the present application provides a capacitor, comprising:
[0005] a heat-conducting substrate;
[0006] a capacitor core group located on one side of the heat-conducting substrate, the capacitor core group comprising a plurality of capacitor cores arranged in an array, the capacitor core comprising a first surface and a second surface arranged oppositely, the first surface being provided with at least one first electrode, the second surface being provided with at least one second electrode, the first electrode and the second electrode being arranged correspondingly and having opposite polarities; the electrode arrangement mode of the capacitor cores located in the same row is the same; the electrode arrangement mode of the capacitor cores located in the same row is the same; 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;
[0007] a first copper bar located on the side of the capacitor core away from the heat-conducting substrate, at least part of the first copper bar being arranged overlappingly with the capacitor cores in adjacent rows along the first direction; the heat-conducting direction of the first copper bar intersects with the electrode direction of the capacitor core;
[0008] The first direction is a direction perpendicular to the capacitor core along the heat-conducting substrate.
[0009] Optionally, the capacitor further comprises a second copper bar located between the heat-conducting substrate and the capacitor core.
[0010] Optionally, along the first direction, the second copper bar is sequentially provided with a first sub-copper bar, an insulating layer and a second sub-copper bar, the first sub-copper bar is opposite in polarity to the second sub-copper bar, and the second sub-copper bar is same in polarity to the first copper bar and is connected.
[0011] Optionally, the first copper bar is provided with at least two first alignment structures, the second copper bar is provided with at least two second alignment structures, and the first alignment structures and the second alignment structures are provided in alignment and clamping.
[0012] Optionally, when the first electrode is same in polarity to the first sub-copper bar and the second electrode is same in polarity to the second sub-copper bar, the first electrode is electrically connected to the first sub-copper bar through a first via, and the second electrode is electrically connected to the second sub-copper bar through a second via.
[0013] Or, when the first electrode is same in polarity to the second sub-copper bar and the second electrode is same in polarity to the first sub-copper bar, the first electrode is electrically connected to the second sub-copper bar through a third via, and the second electrode is electrically connected to the first sub-copper bar through a fourth via.
[0014] Optionally, the capacitor core group comprises at least N rows of capacitor core rows, along the first direction, the first copper bar overlaps the first electrode of the N-1th row of capacitor core rows and the first electrode of the Nth row of capacitor core rows respectively, the first copper bar does not overlap the projection of the second electrode of the N-1th row of capacitor core rows and the projection of the second electrode of the Nth row of capacitor core rows respectively, or the first copper bar overlaps the second electrode of the N-1th row of capacitor core rows and the second electrode of the Nth row of capacitor core rows respectively, the first copper bar does not overlap the projection of the first electrode of the N-1th row of capacitor core rows and the projection of the first electrode of the Nth row of capacitor core rows respectively.
[0015] Wherein, N is a positive integer greater than or equal to 2.
[0016] Optionally, the heat conduction direction of the first copper bar is perpendicular to the electrode direction of the capacitor core.
[0017] Optionally, the capacitor further comprises a shell, along the first direction, the surface of the heat-conducting substrate away from the capacitor core at least partially contacts the shell.
[0018] Optionally, the shell is further provided with at least two third alignment structures close to the capacitor core, and the third alignment structures contact the heat-conducting substrate.
[0019] In a second aspect, the embodiments of the present application also provide an electric vehicle comprising the capacitor of any one of the first aspect.
[0020] The technical scheme of the embodiments of the present application provides a capacitor, comprising: a heat-conducting substrate; a capacitor core group located on one side of the heat-conducting substrate, the capacitor core group comprising a plurality of capacitor cores arranged in an array, each capacitor core comprising oppositely arranged first and second surfaces, the first surface being provided with at least one first electrode and the second surface being provided with at least one second electrode, the first and second electrodes being oppositely arranged; the electrode arrangement mode of the capacitor cores in the same row being the same; the electrode arrangement mode of the capacitor cores in the same row being the same; the first surfaces of the capacitor cores in adjacent rows being arranged adjacently, or the second surfaces of the capacitor cores in adjacent rows being arranged adjacently; a first copper bar located on the side of the capacitor core away from the heat-conducting substrate, at least part of the first copper bar being arranged to overlap the capacitor cores in adjacent rows in a first direction; and the heat-conducting direction of the first copper bar intersecting the electrode direction of the capacitor core. By arranging the first copper bar on the side of the capacitor core away from the heat-conducting substrate, the heat generated in the working process of the capacitor core is released by the first copper bar, the heat dissipation capacity of the capacitor core is improved, and the normal operation of the capacitor core is ensured.
[0021] It should be understood that the content described in this part is not intended to identify the 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
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.
[0023] Figure 1 A structural schematic diagram of a capacitor provided by the embodiments of the present application is shown in FIG. 1.
[0024] Figure 2 A structural schematic diagram of a capacitor provided by the embodiments of the present application is shown in FIG. 1. Figure 1 A sectional structure schematic diagram along the sectional line A-A' is shown in FIG. 2.
[0025] Figure 3 A structural schematic diagram of another capacitor provided by the embodiments of the present application is shown in FIG. 3.
[0026] Figure 4 A structural schematic diagram of another capacitor provided by the embodiments of the present application is shown in FIG. 3. Figure 3 A sectional structure schematic diagram along the sectional line B-B' is shown in FIG. 4.
[0027] Figure 5 A structural schematic diagram of an electric vehicle provided by the embodiments of the present application is shown in FIG. 5. DETAILED DESCRIPTION
[0028] 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 in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.
[0029] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those 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 have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0030] Figure 1 A structural schematic diagram of a capacitor provided by an embodiment of the present application, Figure 2 A structural schematic diagram of a capacitor provided by an embodiment of the present application, Figure 1 A sectional structure schematic diagram along the section line A-A', Figure 3 A structural schematic diagram of a capacitor provided by an embodiment of the present application, Figure 4 A structural schematic diagram of a capacitor provided by an embodiment of the present application, Figure 3 A sectional structure schematic diagram along the section line B-B', Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the capacitor 100 comprises: a heat-conducting substrate 101; a capacitor core group 102 located on one side of the heat-conducting substrate 101, the capacitor core group 102 comprising a plurality of capacitor cores 103 arranged in an array, the capacitor core 103 comprising oppositely arranged first and second surfaces 104 and 105, the first surface 104 being provided with at least one first electrode 106, and the second surface 105 being provided with at least one second electrode 107, the first and second electrodes 106 and 107 being correspondingly arranged and having opposite polarities; the electrodes of the capacitor cores 103 located in the same row are arranged in the same way; the electrodes of the capacitor cores 103 located in the same row are arranged in the same way; the first surfaces 104 of the capacitor cores 103 in adjacent rows are arranged adjacent to each other, or the second surfaces 105 of the capacitor cores 103 in adjacent rows are arranged adjacent to each other; a first copper bar 108 located on the side of the capacitor core 103 away from the heat-conducting substrate 101, at least part of the first copper bar 108 being arranged overlapping the capacitor cores 103 in adjacent rows in a first direction (e.g., the X direction shown in the figure); the heat-conducting direction of the first copper bar 108 (e.g., the Y direction shown in the figure) intersects the electrode direction of the capacitor core 103 (e.g., the Z direction shown in the figure), wherein the first direction X is a direction perpendicular to the heat-conducting substrate 101 and pointing towards the capacitor core 103.
[0031] The heat-conducting substrate 101 can conduct the heat of the capacitor core 103, thereby achieving a certain heat dissipation effect, and also serving as an insulator to ensure the normal operation of the capacitor core 103 and avoid short-circuiting. Figure 1 and Figure 2 As shown, the first surfaces 104 of the capacitor cores 103 in the first row and the first surfaces 104 of the capacitor cores 103 in the second row are arranged adjacent to each other, i.e., the first electrodes 106 of the capacitor cores 103 in the first row and the first electrodes 106 of the capacitor cores 103 in the second row are arranged adjacent to each other. At this time, along the first direction X, the first copper bar 108 overlaps the first electrodes 106 of the capacitor cores 103 in the first and second rows, and the polarity of the first copper bar 108 is the same as that of the first electrode 106, thereby ensuring the conduction of the heat of the capacitor cores 103 in the first and second rows. Figure 3 and Figure 4As shown, the second surfaces 105 of the first row of the capacitor cores 103 and the second surfaces 105 of the second row of the capacitor cores 103 are arranged adjacently, that is, the second electrodes 107 of the first row of the capacitor cores 103 and the second electrodes 107 of the second row of the capacitor cores 103 are arranged adjacently, at this time, along the first direction X, the first copper bar 108 is overlapped with the second electrodes 107 of the first row of the capacitor cores 103 and the second electrodes 107 of the second row of the capacitor cores 103 respectively, the polarity of the first copper bar 108 is the same as that of the second electrodes 107, thereby ensuring the conduction of the heat of the capacitor cores 103 in the first row of the capacitor cores 103 and the second row of the capacitor cores 103. At the same time, in order to ensure that the first copper bar 108 and the capacitor cores 103 work normally, at this time, the heat conduction direction of the first copper bar 108 is arranged to intersect with the electrode direction of the capacitor cores 103, the heat conduction direction of the first copper bar 108 is parallel to the row direction of the capacitor cores 103, and the electrode direction of the capacitor cores 103 can be the direction in which the first electrode 106 points to the second electrode 107 or the direction in which the second electrode 107 points to the first electrode 106, thereby effectively avoiding the short circuit phenomenon between the first copper bar 108 and the capacitor cores 103, affecting the normal work of the capacitor 100, thereby ensuring that the capacitor 100 meets the requirement of large ripple current, ensuring the heat dissipation capacity of the capacitor 100, and improving the bearing capacity of the capacitor 100.
[0032] The capacitor core according to the embodiment of the application comprises a capacitor core group, the capacitor core group comprises a plurality of capacitor cores arranged in an array, the electrode arrangement mode of the capacitor cores in the same row is the same, the electrode arrangement mode of the capacitor cores in the same row is the same, 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, and a first copper bar is arranged on the side of the capacitor core away from the heat-conducting substrate 101, thereby releasing the heat generated in the working process of the capacitor core by means of the first copper bar, improving the heat dissipation capacity of the capacitor core, and thereby ensuring the normal work of the capacitor core.
[0033] Optionally, continuing to refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the capacitor 100 further comprises a second copper bar 109 arranged between the heat-conducting substrate 101 and the capacitor core 103.
[0034] The capacitor 100 is further provided with the second copper bar 109 between the heat-conducting substrate 101 and the capacitor core 103. The second copper bar 109 can also take away the heat generated by the capacitor core 103 during operation. The heat is then conducted to the heat-conducting substrate 101 through the second copper bar 109, and is dissipated through the heat-conducting substrate 101. In combination with the first copper bar 108, the heat of the capacitor core 103 is taken away through the first copper bar 108 and the second copper bar 109, respectively, so as to control the temperature of the capacitor core 103 within a preset range that can be withstood by the material, and ensure the normal operation of the capacitor core 103. Meanwhile, the second copper bar 109 is arranged below the capacitor core 103 and close to the side of the shell, so as to avoid the heat of the second copper bar 109 itself or other heat sources conducted by the second copper bar 109 from affecting the capacitor core 103, and thus affecting the normal use of the capacitor core 103.
[0035] Optionally, with reference to Figure 2 and Figure 4 , the second copper bar 109 is sequentially provided with the first sub-copper bar 1091, the insulating layer 1092 and the second sub-copper bar 1093 along the first direction X. The first sub-copper bar 1091 and the second sub-copper bar 1093 are opposite in polarity. The second sub-copper bar 1093 is the same in polarity as the first copper bar 108 and is connected.
[0036] The second copper bar 109 includes the first sub-copper bar 1091 and the second sub-copper bar 1093. The first sub-copper bar 1091 and the second sub-copper bar 1093 are opposite in polarity, i.e., the first sub-copper bar 1091 and the second sub-copper bar 1093 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 1091 and the second sub-copper bar 1093 from being short-circuited due to different polarities, the insulating layer 1092 is usually arranged between the first sub-copper bar 1091 and the second sub-copper bar 1093, so as to ensure the normal operation of the second copper bar 109. The second sub-copper bar 1093 is located on the side of the capacitor core 103 close to the heat-conducting substrate 101. The first copper bar 108 can be the same in polarity as the second sub-copper bar 1093, so as to make the first copper bar 108 and the second sub-copper bar 1093 contact and connect with each other. The heat conducted on the first copper bar 108 can be conducted to the heat-conducting substrate 101 through the second sub-copper bar 1093, so as to ensure the heat dissipation effect of the capacitor core 103.
[0037] Optionally, with reference to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the first copper bar 108 is provided with at least two first alignment structures 110, and the second copper bar 109 is provided with at least two second alignment structures 111. The first alignment structures 110 and the second alignment structures 111 are arranged in alignment and clamping.
[0038] Wherein, since the second sub-copper row 1093 has the same polarity as the first copper row 108 and is connected, in order to ensure the alignment connection effect of the first copper row 108 and the second sub-copper row 1093, a first alignment structure 110 can be arranged on the first copper row 108, and a second alignment structure 111 is arranged on the second copper row 109, that is, the second alignment structure 111 is arranged on the second sub-copper row 1093. The first alignment structure 110 and the second alignment structure 111 are correspondingly arranged, and the first alignment structure 110 and the second alignment structure 111 are both arranged with two as an example in the example. The shape of the first alignment structure 110 can be a protruding structure, and the shape of the second alignment structure 111 can be a recessed structure, so that along the first direction X, the first alignment structure 110 and the second alignment structure 111 can be aligned and clamped, ensuring the connection effect of the first copper row 108 and the second sub-copper row 1093, and further ensuring the heat dissipation effect of the capacitor core 103.
[0039] Optionally, when the first electrode 106 has the same polarity as the first sub-copper row 1091, and the second electrode 107 has the same polarity as the second sub-copper row 1093, the first electrode 106 is electrically connected with the first sub-copper row 1091 through a first via, and the second electrode 107 is electrically connected with the second sub-copper row 1093 through a second via.
[0040] Or, when the first electrode 106 has the same polarity as the second sub-copper row 1093, and the second electrode 107 has the same polarity as the first sub-copper row 1091, the first electrode 106 is electrically connected with the second sub-copper row 1093 through a third via, and the second electrode 107 is electrically connected with the first sub-copper row 1091 through a fourth via.
[0041] The capacitor core group 102 includes a plurality of capacitor cores 103, and the first electrode 106 and the second electrode 107 of the plurality of capacitor cores 103 are respectively connected with the first sub-copper bar 1091 and the second sub-copper bar 1093 in the second copper bar 109. When the first electrode 106 in the capacitor core 103 has the same polarity as the first sub-copper bar 1091, and the second electrode 107 in the capacitor core 103 has the same polarity as the second sub-copper bar 1093, since the first sub-copper bar 1091 is located on the side of the second sub-copper bar 1093 away from the capacitor core 103, at this time, the first electrode 106 needs to be electrically connected with the first sub-copper bar 1091 through the first via hole 10, and the second electrode 107 needs to be electrically connected with the second sub-copper bar 1093 through the second via hole (not shown in the figure). At this time, the aperture size of the first via hole 10 is smaller than the aperture size of the second via hole, so as to ensure that the first electrode 106 will not contact the second sub-copper bar 1093 during the connection process with the first sub-copper bar 1091, thereby avoiding the short circuit phenomenon. Similarly, when the first electrode 106 of the capacitor core 103 has the same polarity as the second sub-copper bar 1093, and the second electrode 107 of the capacitor core 103 has the same polarity as the first sub-copper bar 1091, since the second sub-copper bar 1093 is located on the side of the first sub-copper bar 1091 close to the capacitor core 103, at this time, the first electrode 106 of the capacitor core 103 needs to be electrically connected with the second sub-copper bar 1093 through the third via hole (not shown in the figure), and the second electrode 107 of the capacitor core 103 is electrically connected with the first sub-copper bar 1091 through the fourth via hole 11. At this time, the aperture size of the third via hole is greater than the aperture size of the fourth via hole 11, so as to ensure that the second electrode 107 will not contact the second sub-copper bar 1093 during the connection process with the first sub-copper bar 1091, thereby avoiding the short circuit phenomenon and ensuring the normal use of the capacitor 100.
[0042] Optionally, continuing to refer to Figure 1 and Figure 3 The capacitor core group 102 includes at least N rows of capacitor core rows 112 along the first direction X. The first copper bar 108 overlaps the first electrode 106 of the N-1th row of capacitor core rows 112 and the first electrode 106 of the Nth row of capacitor core rows 112, respectively, and the first copper bar 108 does not overlap the projection of the second electrode 107 of the N-1th row of capacitor core rows 112 and the projection of the second electrode 107 of the Nth row of capacitor core rows 112, respectively. Alternatively, the first copper bar 108 overlaps the second electrode 107 of the N-1th row of capacitor core rows 112 and the second electrode 107 of the Nth row of capacitor core rows 112, respectively, and the first copper bar 108 does not overlap the projection of the first electrode 106 of the N-1th row of capacitor core rows 112 and the projection of the first electrode 106 of the Nth row of capacitor core rows 112, respectively. Wherein, N is a positive integer greater than or equal to 2.
[0043] Wherein, as Figure 1As shown, the exemplary capacitor core group 102 includes six arrayed capacitor cores, including two rows of capacitor core rows 112 and three capacitor core columns, the first copper bar 108 is arranged between adjacent capacitor core rows 112 and along the first direction X, the first copper bar 108 at least partially overlaps the first capacitor core row 1121 and the second capacitor core row 1122 respectively, when the first electrodes 106 in adjacent capacitor core rows 112 are arranged adjacent to each other, the first copper bar 108 overlaps the first electrodes 106 in the first capacitor core row 1121 and the second capacitor core row 1122 respectively, at this time the polarity of the first copper bar 108 is the same as that of the first electrodes 106, at this time the polarity of the second sub-copper bar 1093 connected to the first copper bar 108 is also the same, at the same time, in order to avoid the short circuit phenomenon caused by the different polarities between the first copper bar 108 and the second electrodes 107, the first copper bar 108 needs to be non-overlapping with the second electrodes 107 in the first capacitor core row 1121 and the second capacitor core row 1122, that is, the first copper bar 108 does not exist connection with the second electrodes 107, maintains a preset distance, realizes the insulation between the first copper bar 108 and the second electrodes 107, and further guarantees the heat conduction of the capacitor core 103. Similarly, as shown, when the second electrodes 107 in the first capacitor core row 1121 and the second capacitor core row 1122 are arranged adjacent to each other, the first copper bar 108 overlaps the second electrodes 107 in the first capacitor core row 1121 and the second capacitor core row 1122 respectively, at this time the polarity of the first copper bar 108 is the same as that of the second electrodes 107, at this time the polarity of the second sub-copper bar 1093 connected to the first copper bar 108 is also the same, at the same time, in order to avoid the short circuit phenomenon caused by the different polarities between the first copper bar 108 and the first electrodes 106, the first copper bar 108 needs to be non-overlapping with the first electrodes 106 in the first capacitor core row 1121 and the second capacitor core row 1122, that is, the first copper bar 108 does not exist connection with the first electrodes 106, maintains a preset distance, realizes the insulation between the first copper bar 108 and the first electrodes 106, and guarantees the heat conduction of the capacitor core 103. Figure 3
[0044] Optionally, the heat conduction direction Y of the first copper bar 108 is perpendicular to the electrode direction Z of the capacitor core 103.
[0045] Optionally, the heat conduction direction Y of the first copper bar 108 is perpendicular to the electrode direction Z of the capacitor core 103.
[0046] Optionally, continuing to refer toFigure 1 、 Figure 2 、 Figure 3 and Figure 4 The capacitor 100 further comprises a casing 113, which is at least partially in contact with the surface of the thermally conductive substrate 101 away from the capacitor core 103 along the first direction X.
[0047] The casing 113 is used to protect the capacitor core 103 in the capacitor 100, and the temperature of the casing 113 is relatively low, which can be used as a cold source to dissipate heat. The casing 113 at least comprises a bottom surface and three side surfaces, but the bottom surface of the casing 113 is in contact with the surface of the thermally conductive substrate 101 away from the capacitor core 103 along the first direction X, so that the heat transferred through the thermally conductive substrate 101 is conducted away through the casing 113, ensuring the heat dissipation effect. Since the casing 113 is usually made of metal material, the positive or negative electrode in the capacitor core 103, the first copper bar 108 and the second copper bar 109 are not in direct contact with the casing 113, ensuring the normal operation of the capacitor 100.
[0048] Optionally, continuing to refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The casing 113 further comprises at least two third alignment structures 114 on the side close to the capacitor core 103, which are in contact with the thermally conductive substrate 101.
[0049] The casing 113 comprises at least two third alignment structures 114 on the side close to the capacitor core 103, and two third alignment structures 114 are exemplarily shown in the figure. The third alignment structures 114 are prepared after the casing 113 is formed, and the third alignment structures 114 can be integrally formed with the casing 113, or the third alignment structures 114 can be prepared again after the casing 113 is formed. The material of the third alignment structures 114 can be the same as or different from that of the casing 113, and the material of the third alignment structures 114 can be selected according to actual design requirements to ensure the heat conduction effect. The third alignment structures 114 are used to contact the thermally conductive substrate 101 to fix the thermally conductive substrate 101 and ensure the stability of the overall structure of the capacitor 100.
[0050] Figure 5 A structural schematic diagram of an electric vehicle provided by an embodiment of the present application is shown in Figure 5 The electric vehicle 200 comprises the capacitor 100 according to any one of the above embodiments.
[0051] It should be noted that the electric vehicle 200 provided by the embodiment has the same or corresponding beneficial effects of the capacitor 100 provided by any of the embodiments of the application, and will not be repeated here.
[0052] 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 in that, include: Thermally conductive substrate; A capacitor core assembly, located on one side of the thermally conductive substrate, comprises a plurality of capacitor cores arranged in an array. Each capacitor core includes a first surface and a second surface disposed opposite to each other. The first surface is provided with at least one first electrode, and the second surface is provided with at least one second electrode. The first electrode and the second electrode are disposed correspondingly and have opposite polarities. The capacitor cores located in the same row have the same electrode arrangement. 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. A first copper busbar is located on the side of the capacitor core away from the thermally conductive substrate. Along a first direction, at least a portion of the first copper busbar overlaps with adjacent rows of capacitor cores. The thermally conductive direction of the first copper busbar intersects with the electrode direction of the capacitor core. The first direction is a direction perpendicular to the thermally conductive substrate and pointing towards the capacitor core; When the first surfaces of the capacitor cores in adjacent rows are arranged adjacently, along the first direction, the first copper busbar overlaps with the first electrode of the capacitor cores in the adjacent rows, and the polarity of the first copper busbar is the same as that of the first electrode. When the second surfaces of the capacitor cores in adjacent rows are arranged adjacently, along the first direction, the first copper busbar overlaps with the second electrode of the capacitor cores in the adjacent rows, and the polarity of the first copper busbar is the same as that of the second electrode.
2. The capacitor according to claim 1, characterized in that, The capacitor also includes a second copper busbar located between the thermally conductive substrate and the capacitor core.
3. The capacitor according to claim 2, characterized in that, Along the first direction, the second copper busbar is sequentially provided with a first sub-copper busbar, an insulating layer, and a second sub-copper busbar. The first sub-copper busbar and the second sub-copper busbar have opposite polarities, and the second sub-copper busbar has the same polarity as the first copper busbar and is connected.
4. The capacitor according to claim 3, characterized in that, The first copper busbar is provided with at least two first alignment structures, and the second copper busbar is provided with at least two second alignment structures, wherein the first alignment structures and the second alignment structures are aligned and snapped together.
5. The capacitor according to claim 3, characterized in that, When the first electrode and the first sub-copper busbar have the same polarity, and the second electrode and the second sub-copper busbar have the same polarity, the first electrode and the first sub-copper busbar are electrically connected through the first via, and the second electrode and the second sub-copper busbar are electrically connected through the second via; Alternatively, when the first electrode and the second sub-copper busbar have the same polarity, and the second electrode and the first sub-copper busbar have the same polarity, the first electrode and the second sub-copper busbar are electrically connected through a third via, and the second electrode and the first sub-copper busbar are electrically connected through a fourth via.
6. The capacitor according to claim 1, characterized in that, The capacitor core assembly includes at least N rows of capacitor cores. In the first direction, the first copper busbar overlaps with the first electrode of the (N-1)th row of capacitor cores and the first electrode of the Nth row of capacitor cores, respectively. The projections of the first copper busbar and the second electrode of the (N-1)th row of capacitor cores do not overlap, and the projections of the first copper busbar and the second electrode of the Nth row of capacitor cores do not overlap. Alternatively, the first copper busbar overlaps with the second electrode of the (N-1)th row of capacitor cores and the second electrode of the Nth row of capacitor cores, respectively. The projections of the first copper busbar and the first electrode of the Nth row of capacitor cores do not overlap, and the projections of the first copper busbar and the first electrode of the Nth row of capacitor cores do not overlap. Where N is a positive integer greater than or equal to 2.
7. The capacitor according to claim 1, characterized in that, The thermal conduction direction of the first copper busbar is perpendicular to the electrode direction of the capacitor core.
8. The capacitor according to claim 1, characterized in that, The capacitor also includes a housing, and along the first direction, the surface of the thermally conductive substrate on the side away from the capacitor core is in at least partial contact with the housing.
9. The capacitor according to claim 8, characterized in that, The casing is also provided with at least two third alignment structures on the side near the capacitor core, and the third alignment structures are in contact with the thermally conductive substrate.
10. An electric vehicle, characterized in that, The capacitor includes any one of claims 1-9.
Citation Information
Patent Citations
From film capacitor for electric automobile who takes heat abstractor
CN206282731U