Vibration durability high-energy hybrid tantalum capacitor

Abstract

The utility model discloses a vibration durability high-energy hybrid tantalum capacitor, which comprises a shell, a seat support, a tantalum core, an insulation structure and a cover plate, the seat support, the tantalum core, the insulation structure and the cover plate are sequentially arranged in the shell from bottom to top, the tantalum core is arranged in the seat support, a lead is arranged on the tantalum core, and the cover plate is respectively connected with the shell and the insulation structure. The lead is provided with a pipe sleeve and sequentially penetrates through the insulation structure and the cover plate to extend out of the shell. The first cathode piece is physically isolated from the bottom of the tantalum shell through the seat support, the cathode ruthenium dioxide plating layer is prevented from being damaged in the vibration process, meanwhile, due to the fact that the seat support is designed to be closed, the tantalum core is fixed, and meanwhile insulation between the tantalum core and the tantalum shell is achieved. The fluororubber insulation ring is adopted to replace a traditional insulation upper gasket and a PTFE insulation ring, the number of internal parts is reduced, the stress area of the insulation ring is increased, 70% compression amount is adopted for fluororubber materials, and the buffer space of longitudinal fixed stress is increased.

Description

TECHNICAL FIELD

[0001] The utility model belongs to capacitor technical field, especially relate to a vibration durability high energy mixed tantalum capacitor. BACKGROUND

[0002] The existing assembly technology of the non-solid electrolyte high energy mixed tantalum capacitor adopts a multi-layer structure of alternately stacking anode tantalum cores and cathode sheets in a tantalum shell, wherein the cathode sheets and the shell serve as the negative electrode of the capacitor, the anode tantalum cores serve as the positive electrode of the capacitor, the anode tantalum cores and the cathode sheets are insulated by a positive and negative electrode insulation layer, the tantalum cores and the shell are insulated by a polytetrafluoroethylene insulation strip, the opening at the top end of the shell is matched with an insulator cover plate, and sealing is realized by laser welding.

[0003] The existing assembly technology has the following two shortcomings: 1. The cathode sheets in direct contact with the bottom of the shell have a large frictional force with the bottom of the shell during vibration, which causes the ruthenium dioxide coating of the cathode sheets to fall off, resulting in a decrease in the negative electrode capacity and a decrease in the capacity lead-out rate of the capacitor, and the falling ruthenium dioxide particles enter the anode tantalum cores, causing the capacitor to deteriorate in leakage current; 2. The insulator cover plate and the longitudinal components rely on an insulation ring to bear pressure, and the existing insulation ring has a small width, so the insulation ring bears a large pressure, resulting in poor longitudinal fixation and poor vibration resistance of the product. SUMMARY

[0004] To solve the above technical problems, the utility model provides a vibration durability high energy mixed tantalum capacitor.

[0005] The utility model discloses a vibration durability high energy mixed tantalum capacitor through the following technical scheme.

[0006] The utility model provides a vibration durability high energy mixed tantalum capacitor, including shell, seat branch, tantalum core, insulating structure and cover plate, the shell is from below to above sequentially set seat branch, tantalum core, insulating structure and cover plate, the tantalum core sets up in seat branch, and the tantalum core is provided with the lead wire, the cover plate is connected with shell, insulating structure respectively, the lead wire is provided with the sleeve, and the lead wire is sequentially passed insulating structure and cover plate and stretches out the outside of shell.

[0007] Preferably, the tantalum core sequentially includes a first cathode sheet, a first anode block, a second cathode sheet, a second anode block and a third cathode sheet from bottom to top, and the third cathode sheet is connected with the insulating structure.

[0008] Preferably, the tantalum core further includes a first insulation layer, which is respectively arranged between the first anode block and the second cathode sheet, between the second cathode sheet and the second anode block, between the second anode block and the third cathode sheet, and between the third cathode sheet and the insulating structure.

[0009] Preferably, a second insulation layer is arranged between the first cathode sheet and the first anode block, and the first cathode sheet is connected to the first anode block through the second insulation layer.

[0010] Preferably, the seat support is in a cylindrical shape, and a groove is arranged in the seat support, and an opening is arranged at the bottom of the groove, and the tantalum core is arranged in the groove.

[0011] Preferably, the insulation structure comprises, from bottom to top, an insulation gasket, an adjusting gasket and an insulation ring, one side of the insulation gasket is connected to the tantalum core, the other side of the insulation gasket is connected to the adjusting gasket, the adjusting gasket is connected to the insulation ring, and the insulation ring is connected to the cover plate.

[0012] Preferably, a slot is arranged on the insulation ring.

[0013] The utility model discloses beneficial effect lies in:

[0014] Compared with the prior art, the utility model discloses a closed PTFE lower bowl fork seat support is used to physically isolate the first cathode sheet and the bottom of the tantalum shell, avoid the damage of the cathode ruthenium dioxide plating layer in the vibration process, and simultaneously, since the seat support adopts a closed design, the fixation of the tantalum core is realized, and the insulation between the tantalum core and the tantalum shell is realized. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the structure schematic diagram of the utility model discloses;

[0016] Fig. 2 It is the structure schematic diagram of the seat support of the utility model discloses;

[0017] Fig. 3 It is the structure schematic diagram of the insulation ring of the utility model discloses;

[0018] In the drawing: 1 - shell, 2 - seat support, 21 - groove, 22 - opening, 3 - second insulation layer, 4 - first cathode sheet, 5 - first insulation layer, 6 - first anode block, 7 - second cathode sheet, 8 - second anode block, 9 - third cathode sheet, 10 - pipe sleeve, 11 - insulation gasket, 12 - adjusting gasket, 13 - insulation ring, 131 - slot, 14 - cover plate, 15 - lead wire. DETAILED DESCRIPTION

[0019] The technical scheme of the utility model will be further described below, but the scope of protection is not limited to the description.

[0020] Example 1:

[0021] As Figs. 1 to 3As shown, a kind of vibration endurance high-energy mixed tantalum capacitor, including shell 1, seat support 2, tantalum core, insulating structure and cover plate 14, the seat support 2, tantalum core, insulating structure and cover plate 14 are sequentially arranged from bottom to top in the shell 1, the tantalum core is arranged in the seat support 2, lead wire 15 is arranged on tantalum core, the cover plate 14 is connected with shell 1, insulating structure respectively, sleeve 10 is arranged on lead wire 15, lead wire 15 is sequentially penetrated through insulating structure and cover plate 14 and extends to the outside of shell 1.

[0022] The tantalum core sequentially includes first cathode sheet 4, first anode block 6, second cathode sheet 7, second anode block 8 and third cathode sheet 9 from bottom to top, and the first cathode sheet 4, the first anode block 6, the second cathode sheet 7, the second anode block 8 and the third cathode sheet 9 are sequentially connected, and the third cathode sheet 9 is connected with the insulating gasket 11 of the insulating structure.

[0023] The first anode block 6 and the second anode block 8 are both 50V1400 μF in specification and φ14.5*3 in size, and are formed by using straight tantalum wire, sintering at 1300 ℃ / 20 min, sintering control specific capacity of 42000 μF·V / g, forming voltage of 70V, and forming current density of 0.008 / 0.006 / 0.005 A / g, and the anode block is assembled according to the capacitor structure of the application after being formed.

[0024] The tantalum core further includes a first insulating layer 5, and the first insulating layer 5 is stacked by 5 insulating layers, and the first insulating layer 5 is arranged between the first anode block 6 and the second cathode sheet 7, between the second cathode sheet 7 and the second anode block 8, between the second anode block 8 and the third cathode sheet 9, and between the third cathode sheet 9 and the insulating gasket 11 of the insulating structure.

[0025] A second insulating layer 3 is arranged between the first cathode sheet 4 and the first anode block 6, and the first cathode sheet 4 is connected with the first anode block 6 through the second insulating layer 3.

[0026] The seat support 2 is in a cylindrical shape, and a groove 21 is arranged in the seat support 2, and an opening 22 is arranged at the bottom of the groove 21, the tantalum core is arranged in the groove 21, and the opening 22 serves as a channel for electrolyte injection and flow. The seat support 2 is a closed PTFE lower bowl fork.

[0027] The insulating structure sequentially includes an insulating gasket 11, an adjusting gasket 12 and an insulating ring 13 from bottom to top, one side of the insulating gasket 11 is connected with the tantalum core, the other side of the insulating gasket 11 is connected with the adjusting gasket 12, the adjusting gasket 12 is connected with the insulating ring 13, and the insulating ring 13 is connected with the cover plate 14.

[0028] The insulating ring 13 is provided with a slot 131, the insulating ring 13 is in a circular shape, and the material of the insulating ring 13 is fluorine rubber.

[0029] The installation method comprises the following steps:

[0030] The first cathode sheet 4 is laid flat on the seat support 2 in the tantalum shell 1, and then the first insulating layer 3, the first anode block 6, the second insulating layer 5, the second cathode sheet 7, the second insulating layer 5, the second anode block 8, the second insulating layer 5, the third cathode sheet 9, the second insulating layer 5, the insulating gasket 11, the adjusting gasket 12, the fluorine rubber insulating ring 13 and the insulator cover plate 14 are laid flat in sequence. After assembly, anode spot welding, electrolyte filling and laser welding are carried out according to the existing high-energy mixed tantalum capacitor production process, and the lead 15 with the sleeve 10 is arranged to obtain a CASD5 type 50V2800μF(φ16*12) capacitor.

[0031] Comparative Example 1

[0032] The existing CASD5 type high-energy mixed tantalum capacitor.

[0033] The vibration performance parameters of Example 1 and Comparative Example 1 are compared in the table.

[0034]

[0035]

[0036] As shown in the above table, the capacitor of Comparative Example 1 can only be kept intact for 1.5h at a random vibration level of 12g, and the capacitor of Example 1 can be kept intact for 40h at a random vibration level of 20g, and the vibration resistance performance is obviously improved.

Claims

1. A high-energy tantalum capacitor of high vibration endurance, characterized by: The capacitor comprises a shell (1), a seat support (2), a tantalum core, an insulation structure and a cover plate (14), the seat support (2), the tantalum core, the insulation structure and the cover plate (14) are sequentially arranged in the shell (1) from bottom to top, the tantalum core is arranged in the seat support (2), a lead wire (15) is arranged on the tantalum core, the cover plate (14) is connected with the shell (1) and the insulation structure respectively, a sleeve (10) is arranged on the lead wire (15), and the lead wire (15) sequentially penetrates through the insulation structure and the cover plate (14) and extends out of the shell (1).

2. A high energy mixed tantalum capacitor of claim 1, wherein: the tantalum powder is a mixture of 80-90% of the first tantalum powder and 10-20% of the second tantalum powder. The tantalum core sequentially comprises a first cathode sheet (4), a first anode block (6), a second cathode sheet (7), a second anode block (8) and a third cathode sheet (9) from bottom to top, and the third cathode sheet (9) is connected with the insulation structure.

3. The high-energy hybrid tantalum capacitor with vibration durability as described in claim 2, characterized in that: The tantalum core further comprises a first insulation layer (5), which is arranged between the first anode block (6) and the second cathode sheet (7), between the second cathode sheet (7) and the second anode block (8), between the second anode block (8) and the third cathode sheet (9) and between the third cathode sheet (9) and the insulation structure respectively.

4. A high energy mixed tantalum capacitor of claim 2, wherein: the tantalum powder is a mixture of 90% of the first tantalum powder and 10% of the second tantalum powder. A second insulation layer (3) is arranged between the first cathode sheet (4) and the first anode block (6), and the first cathode sheet (4) is connected with the first anode block (6) through the second insulation layer (3).

5. A high energy mixed tantalum capacitor of claim 1 wherein: the tantalum powder is a mixture of 90% to 99% of the first tantalum powder and 10% to 1% of the second tantalum powder. The seat support (2) is in a cylindrical shape, a groove (21) is arranged in the seat support (2), an opening (22) is arranged at the bottom of the groove (21), and the tantalum core is arranged in the groove (21).

6. A high energy mixed tantalum capacitor of claim 1 wherein: the tantalum powder is a mixture of 90% of the first tantalum powder and 10% of the second tantalum powder. The insulation structure sequentially comprises an insulation gasket (11), an adjusting gasket (12) and an insulation ring (13) from bottom to top, one side of the insulation gasket (11) is connected with the tantalum core, the other side of the insulation gasket (11) is connected with the adjusting gasket (12), the adjusting gasket (12) is connected with the insulation ring (13), and the insulation ring (13) is connected with the cover plate (14).

7. A high energy mixed tantalum capacitor of the type described in claim 6 wherein: the tantalum powder is a mixture of 90% of the first tantalum powder and 10% of the second tantalum powder. The insulation ring (13) is provided with a slot (131).

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