A power capacitor with high safety performance

Abstract

The present invention relates to the technical field of capacitors, and discloses a power capacitor with high safety performance, wherein heat sinks are arranged on both the front and rear sides of the shell, and the outer side of the heat sink is arranged with dense heat dissipation fins, and the inner side is arranged with a plurality of heat-conducting clamping mechanisms, wherein the heat-conducting clamping mechanisms include a heat-conducting back plate clamped on the heat sink, and a plurality of positioning clamps symmetrically arranged on the heat-conducting back plate, and the capacitor core is clamped inside the positioning clamps. The power capacitor with high safety performance can realize stable positioning of the capacitor core by arranging a plurality of groups of heat-conducting clamping mechanisms inside the shell, clamping the capacitor core in the positioning clamps of the two groups of heat-conducting clamping mechanisms on the corresponding sides, and solving the problem that the capacitor core is easily shaken in the shell due to the melting of paraffin wax in the capacitor core by heat in the past, and avoiding the damage of the capacitor core by collision inside the shell, and at the same time abandoning the use of fillers such as paraffin wax.

Description

Technical Field

[0001] The invention relates to the technical field of capacitors, in particular to a power capacitor with high safety performance. Background Art

[0002] Power capacitors are capacitors used in power systems and electrical equipment, including parallel capacitors, series capacitors, coupling capacitors, circuit breaker capacitors, etc. Existing power capacitors generally include a shell, in which a capacitor core group consisting of multiple capacitor core groups electrically connected is arranged. The capacitor core groups are fixed together by insulating wrapping paper, and then paraffin or insulating oil is filled in the shell as the capacitor filler. However, the positioning and fixation of the capacitor core group of this traditional power capacitor in the shell depends on insulating packaging paper and fillers such as paraffin. Since paraffin and the like are easily melted by heat, the capacitor core group is easy to shake in the shell, causing the capacitor core to collide and be damaged, which has high requirements for the earthquake-resistant structure. For example, the bulge is squeezed by the earthquake-resistant structure, which is easy to cause the capacitor to explode. In addition, fillers such as paraffin have the defect of large swelling properties on the metallized film of the capacitor core, which shortens the service life of the capacitor core. Moreover, when paraffin and oil overflow, they are easy to pollute the environment and burn. In addition, during use, due to the existence of the electric field inside the capacitor and the flow of current, a certain amount of heat will be generated. Although the heat of a single capacitor core is not much, the combined use of capacitor core groups will have the problem of local heat being difficult to dissipate. Summary of the invention

[0003] The object of the present invention is to provide a power capacitor with high safety performance to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a power capacitor with high safety performance, comprising a shell, a sealing cover plate arranged on the top of the shell, and a plurality of capacitor cores arranged inside the shell, the front and rear sides of the capacitor core are both provided with gold-sprayed surfaces, the top of the sealing cover plate is fixedly installed with two groups of connecting terminals, the front and rear sides of the shell are both provided with heat dissipation plates, and the outer side of the heat dissipation plate is provided with dense heat dissipation fins, and the inner side is provided with a plurality of heat conduction clamping mechanisms, the heat conduction clamping mechanism includes a heat conduction back plate clamped on the heat dissipation plate, and a plurality of positioning clamps symmetrically arranged on the heat conduction back plate, the capacitor core is clamped on the inside of the positioning clamp, and the positioning clamp and the heat conduction clamp are connected to each other. An arc-shaped elastic part is provided at the connection of the back plate, and a damping plate is pasted on the inner side of the arc-shaped elastic part. The arc-shaped elastic part applies elastic force to the positioning clamping plate so that the positioning clamping plate always has a tendency to move toward the side close to the capacitor core. The bottom mirror image of the sealing cover plate is provided with two sets of conductive clamping mechanisms, and the conductive clamping mechanisms include a conductive main board, a plurality of conductive support plates arranged on the conductive main board, and a plurality of top-pressing conductive plates arranged on the conductive support plates. When the sealing cover plate is installed on the top of the shell, the top-pressing conductive plate on the conductive support plate can press on the gold-sprayed surface of the capacitor core. An arc-shaped elastic part is provided at the connection between the top-pressing conductive plate and the conductive support plate, and a damping plate is pasted on the inner side of the arc-shaped elastic part.

[0005] As a further solution of the present invention: the heat sink is welded to the inner side of the shell, and the heat sink fins on the heat sink are penetrated through the outside of the shell. The heat sink and the heat sink fins are both made of copper. After the heat dissipated by the capacitor core during operation is conducted to the heat sink by the heat conductive clamping mechanism, the heat can be dissipated to the air outside the capacitor through the heat sink fins outside the heat sink.

[0006] As a further solution of the present invention: a plurality of mounting grooves are provided on the heat sink, and the heat conductive clamping mechanism also includes a mounting slide block. The heat conductive back plate is clamped on the heat sink through the mounting grooves and the mounting slide block, ensuring that the heat conductive clamping mechanism as a whole can be stably installed on the heat sink, and a clamping method is adopted to facilitate disassembly and assembly of the heat conductive clamping mechanism.

[0007] As a further solution of the present invention: the heat-conductive clamping mechanism also includes a guide part and heat-conductive silicone. The guide part is arranged on the top of the positioning clamp, and the heat-conductive silicone is adhered to the side of the positioning clamp close to the capacitor core. The heat-conductive back plate, the mounting slider, the positioning clamp and the arc-shaped elastic part are made of copper. The heat-conductive silicone can fill the gap between the matching surface of the positioning clamp and the capacitor core to improve the heat conduction effect, and the heat-conductive silicone has insulating properties to prevent the capacitor core from conducting electricity to the outside along the positioning clamp.

[0008] As a further solution of the present invention: the damping plate 1 and the damping plate 2 have the same structure and are both composed of a damping rubber material and a constraint layer. The damping rubber material and the constraint layer are connected by hot pressing. The damping rubber material is butyl rubber and the constraint layer is glass fiber. The vibrations on the left and right sides of the capacitor core can be absorbed by the damping plate on the inner side of the arc-shaped elastic part 1, and the vibrations on the front and back sides of the capacitor core can be absorbed by the damping plate on the inner side of the arc-shaped elastic part 2.

[0009] As a further solution of the present invention: the number of conductive support plates in the conductive clamping mechanism is the same as the number of capacitor cores, and the positions of the conductive support plates and the capacitor cores correspond one to one, and the conductive main board, the conductive support plates and the top-pressing conductive plates are made of copper, ensuring that the conductive support plates in the conductive clamping mechanism of the sealing cover plate can be snapped onto the gold-sprayed surface of the capacitor core after installation, thereby realizing the electrical connection between the connecting terminal and the capacitor core, and positioning the front and rear sides of the capacitor core.

[0010] As a further solution of the present invention: the number of the top-pressing conductive plates on the conductive support plate is 3-6 groups, and the top-pressing conductive plates are arranged on the side of the conductive support plate close to the capacitor core, and the bottom end of the connecting terminal is against the top of the conductive main board. When the sealing cover plate is installed, the conductive support plate and the top-pressing conductive plate can be simultaneously plugged into the gold-sprayed surface of the capacitor core, and the gold-sprayed surface is pressed by the top-pressing conductive plate to achieve electrical connection between the capacitor core and the connecting terminal.

[0011] As a further solution of the present invention: the conductive clamping mechanism also includes an insulating lining and an upper insulating rubber pad. The insulating lining is wrapped around the outside of the conductive main board and the conductive support plate, and the upper insulating rubber pad is glued to the bottom of the conductive main board. After the conductive main board is installed inside the shell, the upper insulating rubber pad is pressed against the top of the capacitor core. The upper insulating rubber pad cooperates with the lower insulating rubber pad to absorb vibrations on the upper and lower sides of the capacitor core, thereby achieving all-round shock absorption of the capacitor core.

[0012] As a further solution of the present invention: a lower insulating rubber pad is placed at the bottom of the inner side of the shell, and the area of ​​the lower insulating rubber pad is the same as the area of ​​the bottom of the inner side of the shell. The lower insulating rubber pad can support the capacitor core and absorb vibrations below the capacitor core.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The power capacitor with high safety performance can realize stable positioning of the capacitor core by arranging several groups of heat-conducting clamping mechanisms inside the shell, clamping the capacitor core in the positioning clamping plates of the two groups of heat-conducting clamping mechanisms on the corresponding sides, solving the problem that the capacitor core is easy to shake in the shell due to the melting of paraffin wax and the like in the past, and avoiding the damage of the capacitor core due to collision inside the shell. At the same time, the use of fillers such as paraffin wax is abandoned, and the problem that fillers such as paraffin wax have large swelling properties on the metallized film of the capacitor core is solved. There will be no leakage of fillers to pollute the environment and easy combustion, and the safety is higher.

[0015] 2. The power capacitor with high safety performance has a heat-conducting clamping mechanism made of copper with high thermal conductivity as a whole, and the heat-conducting clamping mechanism is clamped in the heat sink as a whole. When the positioning clamping plate positions and clamps the capacitor core, the heat emitted by the capacitor core during operation can be conducted to the heat sink, and dissipated to the outside of the capacitor through the heat dissipation fins on the outside of the heat sink, thereby achieving efficient heat dissipation of the capacitor core, avoiding damage caused by heat accumulation inside the capacitor, and further improving safety. At the same time, thermal conductive silicone is pasted on the inner side of the positioning clamping plate to fill the gap between the positioning clamping plate and the matching surface of the capacitor core, thereby further improving the thermal conductivity effect. The thermal conductive silicone has insulating properties, thereby avoiding the capacitor core from conducting electricity to the outside along the positioning clamping plate.

[0016] 3. The power capacitor with high safety performance is provided with a mirror-distributed conductive clamping mechanism at the bottom of the sealing cover plate. When the sealing cover plate is installed, the conductive support plate and the top-pressing conductive plate can be simultaneously plugged into the gold-sprayed surface of the capacitor core, and the gold-sprayed surface is pressed by the top-pressing conductive plate to achieve electrical connection between the capacitor core and the connecting terminal, abandoning the previous operation of using copper strips for welding and conducting electricity, making it easier to disassemble and assemble the capacitor core. At the same time, the conductive clamping mechanism can be positioned on both sides of the capacitor core after installation, further improving the stability of the capacitor core after installation inside the shell.

[0017] 4. The power capacitor with high safety performance has damping sheets attached to the inner side of the arc-shaped elastic part 1 and the top-pressure conductive plate. The damping sheet on the inner side of the arc-shaped elastic part 1 can absorb the vibrations on the left and right sides of the capacitor core, and the damping sheet on the inner side of the arc-shaped elastic part 2 can absorb the vibrations on the front and back sides of the capacitor core. The insulating rubber pads distributed up and down can absorb the vibrations on the upper and lower sides of the capacitor core, thereby achieving all-round shock absorption of the capacitor core, preventing the capacitor core from being damaged or even exploded due to vibration, and further improving the safety of the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the overall front view section of the present invention;

[0020] Figure 3 It is a schematic structural diagram of the overall side cross-section of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the combination of the heat conducting clamping mechanism and the heat dissipation plate in the present invention;

[0022] Figure 5 It is a structural schematic diagram of the heat-conducting clamping mechanism in the present invention;

[0023] Figure 6 It is a structural schematic diagram of the top and inner side of the positioning splint in the present invention;

[0024] Figure 7 It is a schematic diagram of the structure of the heat-conducting clamping mechanism in the present invention from a top view;

[0025] Figure 8 It is a structural schematic diagram of the installation position of the conductive clamping mechanism in the present invention;

[0026] Fig. 9 It is a structural schematic diagram of the conductive clamping mechanism in the present invention;

[0027] Fig.10 It is a schematic structural diagram of a side view of a conductive clamping mechanism in the present invention;

[0028] Fig.11 It is a schematic structural diagram of a cross section of the damping plate in the present invention.

[0029] In the figure: 1. shell; 2. sealing cover plate; 3. connecting terminal; 4. capacitor core; 5. heat sink; 6. heat sink fin; 7. mounting slide; 8. heat conducting clamping mechanism; 81. heat conducting back plate; 82. mounting slide; 83. positioning clamping plate; 84. arc-shaped elastic part 1; 85. guiding part; 86. thermal conductive silica gel; 87. damping plate 1; 871. damping rubber material; 872. constraint layer; 9. conductive clamping mechanism; 91. conductive main board; 92. conductive support plate; 93. top pressure conductive plate; 94. arc-shaped elastic part 2; 95. damping plate 2; 96. insulating lining plate; 97. upper insulating rubber pad; 10. lower insulating rubber pad; 11. gold-sprayed surface. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 11In an embodiment of the present invention, a power capacitor with high safety performance includes a housing 1, a sealing cover plate 2 arranged on the top of the housing 1, and a plurality of capacitor cores 4 arranged inside the housing 1, the front and rear sides of the capacitor core 4 are both provided with a gold-sprayed surface 11, the top of the sealing cover plate 2 is fixedly installed with two groups of connecting terminals 3, the front and rear sides of the housing 1 are both provided with a heat sink 5, and the outer side of the heat sink 5 is provided with a dense heat sink fin 6, and the inner side is provided with a plurality of heat-conducting clamping mechanisms 8, the capacitor core 4 is clamped in the positioning clamping plates 83 of the two groups of heat-conducting clamping mechanisms 8 on the corresponding side, the capacitor core 4 can be stably positioned, the capacitor core 4 can be prevented from being damaged by collision inside the housing 1, and at the same time, the filling material will not leak out. The heat conducting clamping mechanism 8 includes a heat conducting back plate 81 clamped on the heat dissipation plate 5, and a plurality of positioning clamps 83 symmetrically arranged on the heat conducting back plate 81. The capacitor core 4 is clamped inside the positioning clamp 83. The heat conducting clamping mechanism 8 is clamped in the heat dissipation plate 5 as a whole. The positioning clamp 83 positions and clamps the capacitor core 4, and at the same time, the heat dissipated by the capacitor core 4 during operation can be conducted to the heat dissipation plate 5, and dissipated to the outside of the capacitor through the heat dissipation fins 6 on the outside of the heat dissipation plate 5, so as to achieve efficient heat dissipation of the capacitor core 4. An arc-shaped elastic portion 84 is provided at the connection between the positioning clamp 83 and the heat conducting back plate 81, and a damping sheet 84 is pasted on the inner side of the arc-shaped elastic portion 84. 7, the arc-shaped elastic part 84 applies elastic force to the positioning clamping plate 83 so that the positioning clamping plate 83 always has a tendency to move toward the side close to the capacitor core 4. The bottom mirror of the sealing cover plate 2 is provided with two sets of conductive clamping mechanisms 9. The conductive clamping mechanisms 9 can be positioned on both sides of the capacitor core 4 after installation to improve the stability of the capacitor core 4 after installation in the housing 1. The conductive clamping mechanisms 9 include a conductive main board 91, a plurality of conductive support plates 92 arranged on the conductive main board 91, and a plurality of top-pressing conductive plates 93 arranged on the conductive support plates 92. When the sealing cover plate 2 is installed on the top of the housing 1, the top-pressing conductive plates 93 on the conductive support plates 92 can be pressed on the gold-sprayed surface 11 of the capacitor core 4. When the sealing cover plate 2 is installed, The conductive support plate 92 and the pressing conductive plate 93 are simultaneously plugged into the gold-sprayed surface 11 of the capacitor core 4, and the gold-sprayed surface 11 is pressed by the pressing conductive plate 93 to realize the electrical connection between the capacitor core 4 and the connecting terminal 3, thereby abandoning the previous operation of welding with copper strips for conduction, and making it easier to disassemble and assemble the capacitor core 4. An arc-shaped elastic part 94 is provided at the connection between the pressing conductive plate 93 and the conductive support plate 92, and a damping plate 95 is pasted on the inner side of the arc-shaped elastic part 94. The vibrations of the left and right sides of the capacitor core 4 are absorbed by the damping plate on the inner side of the arc-shaped elastic part 184, and the vibrations of the front and rear sides of the capacitor core 4 are absorbed by the damping plate on the inner side of the arc-shaped elastic part 94, thereby realizing multi-directional shock absorption of the capacitor core 4.

[0032] As a further implementation scheme of the above invention: the heat sink 5 is welded to the inner side of the shell 1 to ensure that the heat sink 5 is firmly installed on the inner wall of the shell 1, and to ensure the sealing of the matching positions of the heat sink 5, the heat sink fins 6 and the shell 1. The heat sink fins 6 on the heat sink 5 are penetrated through the outside of the shell 1. After the heat dissipation mechanism 8 conducts the heat dissipated by the capacitor core 4 during operation to the heat sink 5, the heat can be dissipated to the air outside the capacitor through the heat sink fins 6 on the outside of the heat sink 5, thereby achieving efficient heat dissipation of the capacitor core 4 and avoiding heat accumulation inside the shell 1. The heat sink 5 and the heat sink fins 6 are both made of copper, thereby ensuring that the heat sink 5 and the heat sink fins 6 have good thermal conductivity and achieve rapid conduction and dissipation of heat.

[0033] As a further implementation scheme of the above invention: a plurality of mounting grooves 7 are provided on the heat sink 5, and the heat conductive clamping mechanism 8 also includes a mounting slide block 82. The heat conductive back plate 81 is clamped on the heat sink 5 through the mounting grooves 7 and the mounting slide block 82, ensuring that the heat conductive clamping mechanism 8 as a whole can be stably installed on the heat sink 5, and a clamping method is adopted to facilitate the disassembly and assembly of the heat conductive clamping mechanism 8.

[0034] As a further implementation scheme of the above invention: the heat-conducting clamping mechanism 8 also includes a guide portion 85 and a heat-conducting silicone 86. The guide portion 85 is arranged on the top of the positioning clamping plate 83. By setting the guide portion 85 that opens outward, when the capacitor core 4 is installed, it can be guided by the guide portion 85, so that the capacitor core 4 can be quickly clamped into the positioning clamping plate 83. The heat-conducting silicone 86 is pasted on the side of the positioning clamping plate 83 close to the capacitor core 4. The heat-conducting silicone 86 can fill the gap between the matching surface of the positioning clamping plate 83 and the capacitor core 4 to improve the heat conduction effect. The heat-conducting silicone 86 is insulating to prevent the capacitor core 4 from conducting electricity to the outside along the positioning clamping plate 83. The material of the heat-conducting back plate 81, the mounting slider 82, the positioning clamping plate 83 and the arc-shaped elastic portion 84 is copper, which ensures that the heat-conducting clamping mechanism 8 as a whole has good thermal conductivity and realizes rapid conduction of the heat emitted by the capacitor core 4.

[0035] As a further implementation scheme of the above invention: the damping plate 1 87 and the damping plate 2 95 have the same structure, both of which are composed of a damping rubber 871 and a constraint layer 872. The damping rubber 871 and the constraint layer 872 are connected by hot pressing. The damping rubber 871 is butyl rubber, and the constraint layer 872 is glass fiber. The vibrations on the left and right sides of the capacitor core 4 can be absorbed by the damping plate on the inner side of the arc-shaped elastic part 1 84, and the vibrations on the front and back sides of the capacitor core 4 can be absorbed by the damping plate on the inner side of the arc-shaped elastic part 2 94, thereby realizing multi-directional shock absorption of the capacitor core 4 and preventing the energy generated by the vibration from being transmitted to the capacitor core 4.

[0036] As a further implementation scheme of the above invention: the number of conductive support plates 92 in the conductive clamping mechanism 9 is the same as the number of capacitor cores 4, and the positions of the conductive support plates 92 and the capacitor cores 4 correspond one to one, ensuring that the conductive support plates 92 in the conductive clamping mechanism 9 of the sealing cover plate 2 can be snapped into the position of the gold-sprayed surface 11 of the capacitor core 4 after installation, thereby realizing the electrical connection between the connecting terminal 3 and the capacitor core 4, and positioning the front and rear sides of the capacitor core 4. The conductive main board 91, the conductive support plates 92 and the top-pressing conductive plates 93 are made of copper, and conduction is performed through the conductive main board 91, the conductive support plates 92 and the top-pressing conductive plates 93 to ensure the conductivity of the connecting terminal 3 and the gold-sprayed surface 11, thereby realizing the electrical connection between the connecting terminal 3 and the capacitor core 4.

[0037] As a further implementation scheme of the above invention: the number of the pressing conductive plates 93 on the conductive support plate 92 is 3-6 groups, and the pressing conductive plates 93 are arranged on the side of the conductive support plate 92 close to the capacitor core 4. By arranging multiple groups of pressing conductive plates 93 to press the capacitor core 4, the stable positioning of the capacitor core 4 is achieved, and the stable electrical connection between the conductive support plate 92 and the capacitor core 4 is achieved. The bottom end of the connecting terminal 3 is abutted against the top of the conductive main board 91. When the sealing cover plate 2 is installed, the conductive support plate 92 and the pressing conductive plate 93 can be simultaneously plugged into the gold-sprayed surface 11 of the capacitor core 4. The gold-sprayed surface 11 is pressed by the pressing conductive plate 93 to achieve the electrical connection between the capacitor core 4 and the connecting terminal 3. The previous operation of welding with copper strips for conduction is abandoned, and the disassembly and assembly of the capacitor core 4 is easier.

[0038] As a further implementation scheme of the above invention: the conductive clamping mechanism 9 also includes an insulating lining 96 and an upper insulating rubber pad 97. The insulating lining 96 is wrapped around the outside of the conductive main board 91 and the conductive support plate 92. By setting the insulating lining 96, the insulation between the conductive support plate 92 and the thermally conductive clamping mechanism 8 is improved. The upper insulating rubber pad 97 is glued to the bottom of the conductive main board 91. After the conductive main board 91 is installed inside the shell 1, the upper insulating rubber pad 97 is pressed against the top of the capacitor core 4. The upper insulating rubber pad 97 cooperates with the lower insulating rubber pad 10 to absorb vibrations on the upper and lower sides of the capacitor core 4, thereby achieving all-round shock absorption of the capacitor core 4, avoiding the energy generated by the vibration from being transmitted to the capacitor core 4, and thus preventing the capacitor core 4 from being damaged by the vibration.

[0039] As a further implementation scheme of the above invention: a lower insulating rubber pad 10 is placed at the bottom of the inner side of the shell 1, and the area of ​​the lower insulating rubber pad 10 is the same as the area of ​​the bottom of the inner side of the shell 1. The lower insulating rubber pad 10 can support the capacitor core 4 and absorb the vibration under the capacitor core 4 to prevent the energy generated by the vibration from being transmitted to the capacitor core 4.

[0040] In the specific implementation, the heat-conducting clamping mechanism 8 is integrally clamped onto the heat sink 5 by cooperating with the mounting slide 82 and the mounting slot 7, and the capacitor core 4 is centrally clamped into the positioning clamps 83 of the two sets of heat-conducting clamping mechanisms 8 on the corresponding sides. When the capacitor core 4 is clamped, it is guided by the guide part 85 to facilitate the clamping of the capacitor core 4 into the positioning clamp 83; after the capacitor core 4 is clamped, the sealing cover plate 2 is installed to the top of the housing 1, and the conductive support plate 92 and the top pressure conductive plate 93 in the conductive clamping mechanism 9 at the bottom of the sealing cover plate 2 are synchronously clamped. The capacitor core 4 is connected to the gold-sprayed surface 11 of the capacitor core 4 to complete the assembly of the capacitor; the capacitor core 4 is clamped and positioned by the positioning clamping plate 83 in the heat-conducting clamping mechanism 8 at the corresponding positions on the front and rear sides to ensure that the capacitor core 4 is stably installed inside the housing 1, and at the same time, the heat dissipated by the capacitor core 4 during operation is conducted to the heat-conducting back plate 81, the installation slider 82 and the heat dissipation plate 5 through the heat-conducting silicone 86 and the positioning clamping plate 83, and the heat is dissipated to the air outside the housing 1 through the heat-dissipating fins 6 outside the heat-dissipating plate 5, so as to achieve the capacitor. The core 4 has high efficiency in heat dissipation. The thermally conductive silicone 86 can fill the gap between the positioning clamp 83 and the matching surface of the capacitor core 4 to improve the heat conduction effect. The thermally conductive silicone 86 has insulation properties to prevent the capacitor core 4 from conducting electricity to the outside along the positioning clamp 83. After the conductive support plate 92 and the top-pressing conductive plate 93 are clamped in place, the top-pressing conductive plate 93 is elastically deformed by the position of the arc-shaped elastic part 94, which can press the gold-sprayed surface 11 of the capacitor core 4 to achieve a stable electrical connection between the capacitor core 4 and the connecting terminal 3. At the same time, on the basis of the positioning clamp 83, the conductive support plate 92 and the top-pressing conductive plate 93 are elastically deformed by the position of the arc-shaped elastic part 94, which can press the gold-sprayed surface 11 of the capacitor core 4 to achieve a stable electrical connection between the capacitor core 4 and the connecting terminal 3. The conductive support plate 92 and the top-pressing conductive plate 93 can reposition the capacitor core 4; the vibrations on the left and right sides of the capacitor core 4 are absorbed by the damping plate 87 on the inner side of the arc-shaped elastic part 84, the vibrations on the front and back sides of the capacitor core 4 are absorbed by the damping plate 95 on the inner side of the arc-shaped elastic part 94, and the vibrations on the upper and lower sides of the capacitor core 4 are absorbed by the upper insulating rubber pad 97 and the lower insulating rubber pad 10, so as to provide all-round shock-absorbing treatment for the capacitor core 4 to prevent the energy generated by the vibration from being transmitted to the capacitor core 4.

[0041] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A power capacitor with high safety performance, comprising a housing (1), a sealing cover plate (2) arranged on the top of the housing (1), and a plurality of capacitor cores (4) arranged inside the housing (1), wherein the front and rear sides of the capacitor core (4) are both provided with gold-sprayed surfaces (11), and two groups of connection terminals (3) are fixedly mounted on the top of the sealing cover plate (2), characterized in that: The housing (1) is provided with heat sinks (5) on both the front and rear sides thereof, and the heat sinks (5) are provided with dense heat dissipation fins (6) on the outer side thereof and with a plurality of heat-conducting clamping mechanisms (8) on the inner side thereof. The heat-conducting clamping mechanisms (8) include a heat-conducting back plate (81) clamped on the heat sink (5), and a plurality of positioning clamps (83) symmetrically arranged on the heat-conducting back plate (81). The capacitor core (4) is clamped on the inside of the positioning clamp (83). An arc-shaped elastic portion (84) is provided at the connection between the positioning clamp (83) and the heat-conducting back plate (81), and a damping sheet (87) is adhered to the inner side of the arc-shaped elastic portion (84). The arc-shaped elastic portion (84) applies elastic force to the positioning clamp (83) so that the positioning clamp (83) is in a stable state. ) always has a tendency to move toward a side close to the capacitor core (4), the bottom mirror image of the sealing cover plate (2) is provided with two sets of conductive clamping mechanisms (9), and the conductive clamping mechanisms (9) include a conductive main board (91), a plurality of conductive support plates (92) provided on the conductive main board (91), and a plurality of top-pressing conductive plates (93) provided on the conductive support plates (92), when the sealing cover plate (2) is mounted on the top of the housing (1), the top-pressing conductive plates (93) on the conductive support plates (92) can press against the gold-sprayed surface (11) of the capacitor core (4), the connection between the top-pressing conductive plates (93) and the conductive support plates (92) is provided with a second arc-shaped elastic portion (94), and a second damping sheet (95) is adhered to the inner side surface of the second arc-shaped elastic portion (94).

2. A power capacitor with high safety performance according to claim 1, characterized in that: The heat sink (5) is welded to the inner side of the shell (1); the heat sink fins (6) on the heat sink (5) are inserted into the outside of the shell (1); and the heat sink (5) and the heat sink fins (6) are both made of copper.

3. A power capacitor with high safety performance according to claim 1, characterized in that: The heat dissipation plate (5) is provided with a plurality of mounting slots (7), the heat conduction clamping mechanism (8) further comprises a mounting slide block (82), and the heat conduction back plate (81) is clamped onto the heat dissipation plate (5) via the mounting slots (7) and the mounting slide block (82).

4. A power capacitor with high safety performance according to claim 1, characterized in that: The heat-conducting clamping mechanism (8) further comprises a guide portion (85) and a heat-conducting silica gel (86); the guide portion (85) is arranged on the top of the positioning clamp plate (83); the heat-conducting silica gel (86) is adhered to a side of the positioning clamp plate (83) close to the capacitor core (4); and the heat-conducting back plate (81), the mounting slide block (82), the positioning clamp plate (83) and the arc-shaped elastic portion 1 (84) are made of copper.

5. A power capacitor with high safety performance according to claim 1, characterized in that: The damping sheet 1 (87) and the damping sheet 2 (95) have the same structure, both of which are composed of a damping rubber material (871) and a constraint layer (872). The damping rubber material (871) and the constraint layer (872) are connected by hot pressing. The damping rubber material (871) is butyl rubber, and the constraint layer (872) is glass fiber.

6. A power capacitor with high safety performance according to claim 1, characterized in that: The number of the conductive support plates (92) in the conductive clamping mechanism (9) is the same as the number of the capacitor cores (4), and the positions of the conductive support plates (92) and the capacitor cores (4) correspond one to one. The conductive main plate (91), the conductive support plates (92) and the top-pressing conductive plate (93) are made of copper.

7. A power capacitor with high safety performance according to claim 1, characterized in that: The number of the pressing conductive plates (93) on the conductive support plate (92) is 3-6 groups, and the pressing conductive plates (93) are arranged on a side of the conductive support plate (92) close to the capacitor core (4), and the bottom end of the connecting terminal (3) abuts against the top of the conductive main plate (91).

8. A power capacitor with high safety performance according to claim 1, characterized in that: The conductive clamping mechanism (9) further comprises an insulating lining (96) and an upper insulating rubber pad (97); the insulating lining (96) is wrapped around the outside of the conductive main board (91) and the conductive support board (92); the upper insulating rubber pad (97) is glued to the bottom of the conductive main board (91); after the conductive main board (91) is installed inside the housing (1), the upper insulating rubber pad (97) is pressed against the top of the capacitor core (4).

9. A power capacitor with high safety performance according to claim 1, characterized in that: A lower insulating rubber pad (10) is placed at the bottom of the inner side of the shell (1), and the area of ​​the lower insulating rubber pad (10) is the same as the area of ​​the bottom of the inner side of the shell (1).

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