Large ripple current resistant bolt type electrolytic capacitor

Abstract

The utility model relates to the technical field of electronic components, and discloses a large ripple current resistant bolt type electrolytic capacitor, which comprises a capacitor body, the capacitor body comprises an insulating partition plate arranged in the middle, the front end and the rear end of the insulating partition plate are respectively provided with an aluminum electrode, and the outer sides of the aluminum electrodes are wrapped with solid electrolyte. The two aluminum electrodes are arranged in a central symmetry mode relative to the insulating partition plate, and the single aluminum electrode is arranged in a coiled mode. According to the utility model, the high-capacity electrode is arranged, that is, the bolt type electrolytic capacitor adopts the aluminum electrode, the aluminum electrode is arranged in a coiled shape, the surface area of the aluminum electrode is large, higher current density can be borne, the larger the area of the electrode is, the larger the current can be shared, and meanwhile, the outer side of the electrode is sleeved with the solid electrolyte in a matched manner; the use of a solid electrolyte rather than a liquid can further improve its ripple current resistance because the solid electrolyte has better electrical conductivity and thermal stability.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic components, in particular to a bolt-type electrolytic capacitor with high ripple current resistance. Background Technique

[0002] The structure of a bolt-type electrolytic capacitor includes a metal shell (usually aluminum), with two aluminum electrodes and an electrolyte (usually liquid or solid) inside. The electrodes are separated by an insulating material, and an electrochemical reaction is formed between the electrolyte and the electrodes. When working, current passes through the electrolyte and the electrodes, generating charges stored on the surface of the electrodes to form an electric field, thereby realizing energy storage. This kind of capacitor is suitable for high-voltage and large-capacity occasions.

[0003] The existing bolt-type electrolytic capacitors still have the following problems in use: Since their internal electrodes are aluminum foils and the electrolyte, the electrodes are separated by an insulating layer, but the electrolyte used is a liquid electrolyte, its ripple current resistance ability is limited, and at the same time, the conductivity and thermal stability of its liquid electrolyte are also limited. In addition, its bolt-type capacitor lacks an auxiliary heat dissipation structure design, and the capacitor is extremely easy to overheat due to ripple current, and the heat accumulation inside the capacitor will reduce its ripple current bearing capacity. Content of the Utility Model

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides a bolt-type electrolytic capacitor with high ripple current resistance, and solves the problems put forward in the background technique.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the utility model provides the following technical solutions: A bolt-type electrolytic capacitor with high ripple current resistance, including a capacitor body, the capacitor body includes an insulating partition arranged in the middle, and an aluminum electrode is arranged at each of the front and rear ends of the insulating partition. A solid electrolyte is wrapped outside the aluminum electrode, and the two aluminum electrodes are arranged in central symmetry with respect to the insulating partition, and a single aluminum electrode is arranged in a coiled shape.

[0008] As a further scheme of the utility model: A heat-conducting copper shell is wrapped outside the insulating partition and the two solid electrolytes. The heat-conducting copper shell is arranged in a long cylindrical shape. A fitting hole for fixedly installing the tops of the two aluminum electrodes is opened at the top of the heat-conducting copper shell. A graphene sleeve is fixedly sleeved on the peripheral side and the bottom outer wall of the heat-conducting copper shell, and a heat-conducting gel is filled between the inner wall of the graphene sleeve and the outer wall of the heat-conducting copper shell.

[0009] As a further solution of the present utility model: a threaded connection mechanism is provided at the top end of the aluminum electrode. The threaded connection mechanism includes an electrode connection block fixedly connected to the top end of the aluminum electrode. A threaded connection seat is fixedly connected to the top end of the electrode connection block, and a threaded connection groove is provided at the center position of the top end of the threaded connection seat.

[0010] As a further solution of the present utility model: a second protective strip is fixedly connected between the two electrode connection blocks. Two first protective strips are symmetrically fixedly connected to the middle of the second protective strip, and a heat-conducting copper shell is fixedly connected to the bottom of the first protective strip and the second protective strip.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. In the present utility model, by providing a large-capacity electrode, that is, the bolt-type electrolytic capacitor uses an aluminum electrode, and the aluminum electrode is arranged in a coiled shape, with a larger surface area, it can withstand a higher current density. The larger the area of the electrode, the greater the current it can share. At the same time, a solid electrolyte is sleeved on the outside, using a solid electrolyte instead of a liquid, which can further improve its ability to withstand ripple current because the solid electrolyte has better conductivity and thermal stability.

[0013] 2. In the present utility model, since the electrode housing uses a heat-conducting copper shell, the heat of the electrode structure and the electrolyte inside can be efficiently conducted to the heat-conducting copper shell on the outside. A graphene sleeve is sleeved on the outside of the heat-conducting copper shell, which can assist the heat on the heat-conducting copper shell to be efficiently dissipated and at the same time play an insulating role. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the overall three-dimensional view of the present utility model;

[0015] Figure 2 is the partial sectional three-dimensional view of the present utility model;

[0016] Figure 3 is the overall component disassembled three-dimensional view of the present utility model.

[0017] In the figure: 1. Capacitor body; 2. Graphene sleeve; 11. Heat-conducting copper shell; 12. Solid electrolyte; 13. Insulating partition; 14. Aluminum electrode; 15. Electrode connection block; 16. Threaded connection seat; 17. Threaded connection groove; 18. First protective strip; 19. Second protective strip; 110. Fitting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1 to 3 , in the embodiment of the present invention, a bolt-type electrolytic capacitor resistant to large ripple current includes a capacitor body 1. The capacitor body 1 includes an insulating partition 13 disposed in the middle. There is an aluminum electrode 14 at each of the front and rear ends of the insulating partition 13. A solid electrolyte 12 is wrapped outside the aluminum electrode 14. The two aluminum electrodes 14 are symmetrically arranged about the insulating partition 13. A single aluminum electrode 14 is arranged in a coiled shape. A large-capacity electrode is provided as a whole. That is, the bolt-type electrolytic capacitor uses the aluminum electrode 14, and its aluminum electrode 14 is arranged in a coiled shape, and its surface area is relatively large, which can withstand a higher current density. The larger the area of the electrode, the greater the current that can be shared. At the same time, a solid electrolyte is sleeved outside it. Using the solid electrolyte 12 instead of liquid can further improve its ability to withstand ripple current because the solid electrolyte 12 has better conductivity and thermal stability.

[0020] The insulating partition 13 and the outside of the two solid electrolytes 12 are wrapped with a heat-conducting copper shell 11. The heat-conducting copper shell 11 is arranged in a long cylindrical shape. A mating hole 110 for fixedly installing the tops of the two aluminum electrodes 14 is opened at the top of the heat-conducting copper shell 11. A graphene sleeve 2 is fixedly sleeved on the peripheral side and the outer bottom wall of the heat-conducting copper shell 11. And a heat-conducting gel is filled between the inner wall of the graphene sleeve 2 and the outer wall of the heat-conducting copper shell 11. Its electrode housing uses the heat-conducting copper shell 11. The heat of the electrode structure and the electrolyte inside can be efficiently conducted to the heat-conducting copper shell 11 outside it. The graphene sleeve 2 is sleeved outside the heat-conducting copper shell 11, which can assist the heat on the heat-conducting copper shell 11 to be efficiently dissipated and play an insulating role at the same time.

[0021] A threaded connection mechanism is provided at the top of the aluminum electrode 14. The threaded connection mechanism includes an electrode connection block 15 fixedly connected to the top of the aluminum electrode 14. A threaded connection seat 16 is fixedly connected to the top of the electrode connection block 15. A threaded connection groove 17 is opened at the center position of the top of the threaded connection seat 16. The wiring work of the bolt-type electrolytic capacitor can be carried out through the threaded connection mechanism at the top of the aluminum electrode 14. That is, the circuit connection work is carried out by cooperating with a threaded circuit device through the threaded connection groove 17 opened at the center position of the top of the threaded connection seat 16.

[0022] A second protective strip 19 is fixedly connected between two electrode connection blocks 15. Two first protective strips 18 are symmetrically and fixedly connected to the middle of the second protective strip 19. The first protective strip 18 and the bottom of the second protective strip 19 are fixedly connected with a heat-conducting copper shell 11. The two protective strips play a protective role on the top of the heat-conducting copper shell 11.

[0023] The working principle of the present utility model is as follows: The wiring work of the bolt-type electrolytic capacitor can be carried out through the threaded connection mechanism at the top of the aluminum electrode 14, that is, the threaded connection groove 17 is provided at the center position of the top of the threaded connection seat 16 to cooperate with the threaded circuit device for circuit connection work. The two aluminum electrodes 14 are separated by an insulating partition 13. Its solid electrolyte 12 forms an electrochemical reaction with the aluminum electrode 14. During operation, current passes through the solid electrolyte 12 and the aluminum electrode 14, generating charges stored on the surface of the electrode to form an electric field, thereby realizing energy storage. Since a large-capacity electrode is provided as a whole, that is, the bolt-type electrolytic capacitor uses the aluminum electrode 14, and the aluminum electrode 14 is arranged in a coiled shape, its surface area is relatively large, and it can withstand a higher current density. The larger the area of the electrode, the greater the current that can be shared. At the same time, a solid electrolyte is sleeved on the outside thereof, and the solid electrolyte 12 is used instead of a liquid, which can further improve its ability to withstand ripple current because the solid electrolyte 12 has better conductivity and thermal stability. In addition, the electrode housing uses a heat-conducting copper shell 11, and the heat of the electrode structure and the electrolyte heat inside it can be efficiently conducted to the heat-conducting copper shell 11 on the outside. A graphene sleeve 2 is sleeved on the outside of the heat-conducting copper shell 11, which can assist the heat on the heat-conducting copper shell 11 to be efficiently dissipated and at the same time play an insulating effect.

[0024] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A bolt-type electrolytic capacitor resistant to large ripple current, comprising a capacitor body (1); It is characterized in that: The capacitor body (1) includes an insulating partition (13) disposed in the middle. At each of the front and rear ends of the insulating partition (13), there is an aluminum electrode (14), and a solid electrolyte (12) is wrapped outside the aluminum electrode (14); The insulating partition (13) and the two solid electrolytes (12) are wrapped outside with a heat-conducting copper shell (11), and the heat-conducting copper shell (11) is arranged in a long cylindrical shape; The two aluminum electrodes (14) are arranged in central symmetry with respect to the insulating partition (13). Each individual aluminum electrode (14) is arranged in a coiled shape, and a threaded connection mechanism is provided at the top of the aluminum electrode (14).

2. The bolt-type electrolytic capacitor resistant to large ripple current according to claim 1, characterized in that: The threaded connection mechanism includes an electrode connection block (15) fixedly connected to the top of the aluminum electrode (14).

3. The bolt-type electrolytic capacitor resistant to large ripple current according to claim 2, characterized in that: A threaded connection seat (16) is fixedly connected to the top of the electrode connection block (15).

4. A bolt-type electrolytic capacitor resistant to large ripple current according to claim 3, characterized in that: A threaded connection groove (17) is opened at the center position of the top of the threaded connection seat (16).

5. The bolt-type electrolytic capacitor resistant to large ripple current according to claim 1, characterized in that: A mating hole (110) for fixedly installing the tops of the two aluminum electrodes (14) is opened at the top of the heat-conducting copper shell (11).

6. The bolt-type electrolytic capacitor capable of withstanding large ripple current according to claim 1, wherein: A graphene sleeve (2) is fixedly sleeved on the peripheral side and the outer bottom wall of the heat-conducting copper shell (11), and a heat-conducting gel is filled between the inner wall of the graphene sleeve (2) and the outer wall of the heat-conducting copper shell (11).

7. A bolt-type electrolytic capacitor resistant to large ripple current according to claim 1, characterized in that: A second protective strip (19) is fixedly connected between the two electrode connection blocks (15). Two first protective strips (18) are symmetrically fixedly connected to the middle of the second protective strip (19). The first protective strip (18) and the bottom of the second protective strip (19) are fixedly connected to the heat-conducting copper shell (11).

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