A pulse support capacitor with a bleeder resistor and a method of manufacturing the same

Abstract

A pulse-supported capacitor with a bleed resistor and its manufacturing method are disclosed. The pulse-supported capacitor includes a capacitor body and two supports disposed opposite to each other on both sides of the capacitor body. The capacitor body includes a capacitor chip, two end electrodes disposed opposite to each other at both ends of the capacitor chip, and a bleed resistor disposed on the top surface of the capacitor chip and connected between the two end electrodes. The two supports are respectively connected to the two end electrodes. Each support includes a connecting frame connected to the end electrodes, a support foot disposed below the connecting frame and connected to a circuit board, and a connecting lead disposed between the frame and the support foot. This application defines the structure of the pulse-supported capacitor and provides a bleed resistor on its surface, so that the pulse-supported capacitor can form a path with the bleed resistor after the circuit is interrupted, releasing the residual energy of the capacitor through the resistor, thereby improving the safety of the circuit.

Description

Technical Field

[0001] This invention belongs to the field of pulsed capacitor fabrication, specifically relating to a pulsed capacitor with a discharge resistor and its fabrication method. Background Technology

[0002] Pulse-supported capacitors are widely used in relatively extreme environments such as detonation and ignition, requiring higher standards for structural and functional reliability. Furthermore, the discharge of pulse-supported capacitors is crucial; even when the power is off, a charged capacitor can still cause electric shock, necessitating the addition of soldered resistors. This cumbersome process increases the installation requirements and warrants further improvement. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pulse support capacitor with a discharge resistor. Another purpose is to provide a method for preparing the above-mentioned pulse support capacitor.

[0004] The present invention adopts the following technical solution:

[0005] A pulse-supported capacitor with a discharge resistor includes a capacitor body and two supports disposed opposite to each other on both sides of the capacitor body. The capacitor body includes a capacitor chip, two end electrodes disposed opposite to each other at both ends of the capacitor chip, and a discharge resistor disposed on the top surface of the capacitor chip and connected between the two end electrodes. The two supports are respectively connected to the two end electrodes. Each support includes a connecting frame connected to the end electrodes, a support foot disposed below the connecting frame and connected to a circuit board, and a connecting lead disposed between the frame and the support foot.

[0006] Furthermore, the connecting lead includes a positioning part connected to the support foot and two extension parts that are disposed opposite to each other on both sides of the positioning part and extend upward to connect with the connecting frame. The connecting frame extends outward from the opposite surface of the end electrode to form a lead groove for the extension parts to be embedded.

[0007] Furthermore, the lead wire groove is inclinedly disposed on the connecting frame.

[0008] Furthermore, the support foot includes a support foot body and a limiting block disposed on the support foot body for fixing the positioning part, the limiting block having a clearance hole for the positioning part to pass through.

[0009] Furthermore, the capacitor body also includes a protective layer disposed on the surface of the discharge resistor.

[0010] A method for preparing a pulse bracket capacitor with a discharge resistor involves fixing the capacitor body and two brackets onto a reflow soldering fixture, and then sending the reflow soldering fixture equipped with the capacitor body and two brackets into a reflow oven for reflow soldering to obtain the pulse bracket capacitor.

[0011] The reflow soldering fixture includes a base, a mounting groove on the base for mounting the capacitor body, two positioning grooves on the base located on both sides of the mounting groove for mounting brackets, two fixing mechanisms on the base for fixing opposite brackets, and a clamping mechanism on the base for clamping the capacitor body and the two brackets.

[0012] When assembling a pulse support capacitor, first fix the capacitor body in the mounting slot, then install the two supports in the two positioning slots respectively so that the supports are in contact with the end electrodes of the capacitor body; then the fixing mechanism pre-positions the opposing supports; then the clamping mechanism clamps the two supports at both ends of the capacitor body, and the fixing mechanism fixes the supports to complete the assembly of the pulse support capacitor.

[0013] Furthermore, the fixing mechanism includes a fixing block detachably mounted on the base and a fixing member disposed between the fixing block and the base, wherein the fixing block is provided with a fixing part for fixing the support foot.

[0014] Furthermore, the fastener includes a first fixing hole on the fixing block, a second fixing hole on the base opposite to the first fixing hole, and a fixing bolt that passes through the first fixing hole and engages with the second fixing hole.

[0015] Furthermore, the clamping mechanism includes two clamping blocks disposed opposite to each other on the sides of the two supports and a clamping member disposed between the clamping blocks and the base, wherein the clamping blocks are located above the fixing mechanism.

[0016] Furthermore, the clamping component includes two first clamping holes disposed opposite to each other on both sides of the clamping block, two second clamping holes disposed on the base and respectively opposite to the two first clamping holes, positioning magnets disposed in the two second clamping holes respectively, and clamping bolts passing through the first clamping holes and fitting against the relative positioning magnets.

[0017] As can be seen from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are as follows: By defining the structure of the pulse support capacitor and setting a discharge resistor on its surface, the pulse support capacitor can form a path with the discharge resistor after the circuit is interrupted, releasing the residual energy of the capacitor through the resistor, thereby improving the safety of the circuit. Furthermore, by defining the structure of the support and improving the reliability of the support capacitor in resisting mechanical vibration through the cooperation between the connecting frame, connecting leads and support feet, the prepared pulse support capacitor can meet the needs of the market.

[0018] The structure of the reflow soldering fixture is further defined. The fixing mechanism fixes the bracket to fit the end of the capacitor body, and the clamping mechanism clamps and fixes the assembled capacitor body and the bracket to meet the clamping force required for the bracket capacitor during the reflow soldering process, thereby meeting the requirements of mass production and effectively improving production efficiency. Attached Figure Description

[0019] Figure 1 Schematic diagram of the first embodiment of the pulse support capacitor Figure 1 ;

[0020] Figure 2 Schematic diagram of the first embodiment of the pulse support capacitor Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the second embodiment of the pulse support capacitor;

[0022] Figure 4 Schematic diagram of the third embodiment of the pulse support capacitor Figure 1 ;

[0023] Figure 5 Schematic diagram of the third embodiment of the pulse support capacitor Figure 2 ;

[0024] Figure 6 This is a schematic diagram of the fourth embodiment of the pulse support capacitor;

[0025] Figure 7 Schematic diagram of reflow soldering fixture Figure 1 ;

[0026] Figure 8 Schematic diagram of reflow soldering fixture Figure 2 ;

[0027] Figure 9 Schematic diagram of reflow soldering fixture Figure 3 ;

[0028] Figure 10 Schematic diagram of reflow soldering fixture Figure 4 ;

[0029] In the diagram, 1-capacitor body, 2-bracket, 3-base, 4-mounting seat, 5-mounting groove, 6-positioning groove, 7-fixing mechanism, 8-clamping mechanism, 11-capacitor chip, 12-end electrode, 13-bleeding resistor, 14-protective layer, 21-connecting frame, 211-support plate, 212-lead groove, 22-support foot, 221-support foot plate, 222-limiting block, 223-clearance hole, 224-support section, 225-arc-shaped limiting section 23-Connecting lead wire, 231-Positioning part, 232-Extension part, 31-Weight reduction hole, 71-Fixing block, 711-Fixing part, 712-Fixing groove, 72-Fixing component, 721-First fixing hole, 722-Second fixing hole, 723-Fixing bolt, 81-Clamping block, 811-Limiting groove, 812-Receiving plate, 82-Clamping component, 821-First clamping hole, 822-Second clamping hole, 823-Positioning magnet, 824-Clamping bolt. Detailed Implementation

[0030] The present invention will be further described below through specific embodiments.

[0031] Reference Figures 1 to 6 As shown, a pulse support capacitor with a discharge resistor includes a capacitor body 1 and two supports 2 disposed opposite to each other at both ends of the capacitor body 1.

[0032] The capacitor body 1 includes a capacitor chip 11, two end electrodes 12 disposed opposite to each other at both ends of the capacitor chip 11, a discharge resistor 13 disposed on the top surface of the capacitor chip 11 and connected between the two end electrodes 12, and a protective layer 14 disposed on the surface of the discharge resistor 13. The protective layer 14 prevents arcing or contamination of the discharge resistor 13 during production, thus avoiding any impact on its performance. Specifically, the discharge resistor 13 can be configured as a single or dual resistor. When dual discharge resistors 13 are configured, it ensures that residual energy can still be released even if a single discharge resistor 13 fails. Further, refer to... Figures 1 to 3 As shown, the bleeder resistor 13 can be arranged in a strip shape on the surface of the capacitor chip 11; refer to Figures 4 to 5 As shown, the bleeder resistor 13 can be arranged in an arc shape on the surface of the capacitor chip 11; refer to Figure 6 As shown, the bleeder resistor 13 can be arranged in an S-shape on the surface of the capacitor chip 11.

[0033] The two brackets 2 are respectively connected to the two end electrodes 12. The bracket 2 includes a connecting frame 21 connected to the end electrodes 12, a support foot 22 disposed below the connecting frame 21 and connected to the circuit board 12, and a connecting lead 23 disposed between the connecting frame 21 and the support foot 22.

[0034] The connecting frame 21 includes two support plates 211 spaced apart and extending inward at its bottom, and the capacitor body 1 is supported between four opposing support plates 211.

[0035] The connecting lead 23 includes a positioning part 231 connected to the support foot 22 and two extension parts 232 that are disposed opposite to each other on both sides of the positioning part 231 and extend upward to connect to the connecting frame 21. This gives the connecting lead 23 a U-shaped structure design, which can better release stress from vibration and impact, improve the reliability of the pulse support capacitor, and prevent stress from being transmitted to the end of the pulse support capacitor. Correspondingly, the connecting frame 21 and the end electrode 12 are stamped outward to form a lead groove 212 for the extension parts 232 to be embedded. Specifically, the lead groove 212 is inclined on the connecting frame 21. By embedding and wrapping the connecting lead 23 in the lead groove 212, the bonding strength between the connecting lead 23 and the connecting frame 21 is greatly enhanced, and the inclined connecting lead 23 can better withstand impact without deformation. Furthermore, the connecting lead 23 is made of copper wire to ensure the support force on the capacitor body 1.

[0036] The support foot 22 includes a support foot body 221 and a limiting block 222 disposed on the support foot body 221 for fixing the positioning part 231. Specifically, the limiting block 222 has a clearance hole 223 for the positioning part 231 to pass through. By limiting the structure of the support foot 22, it has better structural strength and allows the positioning part 231 of the connecting lead 23 to undergo axial rotational deformation, so that the support end of the pulse bracket capacitor has a certain torsional deformation capability without transmitting stress to the capacitor body end. Furthermore, the limiting block 222 includes two support segments 224 disposed at intervals opposite to each other on the support foot body 221 and an arc-shaped limiting segment 225 connected between the two support segments 224. The arc-shaped limiting segment 225 and the support foot body 221 form a clearance hole 223 for the connecting lead positioning part 232 to pass through.

[0037] A method for preparing a pulse support capacitor with a discharge resistor includes fixing a capacitor body 1 and two supports 2 on a reflow soldering fixture, and then sending the reflow soldering fixture equipped with the capacitor body 1 and supports 2 into a reflow oven for reflow soldering to obtain the pulse support capacitor with a discharge resistor.

[0038] Reference Figures 7 to 10As shown, the reflow soldering fixture includes a base 3, a mounting seat 4 located in the middle of the base 3, a mounting groove 5 extending downward from the top surface of the mounting seat 4 for mounting the capacitor body 1, two positioning grooves 6 located on both sides of the mounting groove 5 on the base 3 for mounting the brackets 2, two fixing mechanisms 7 arranged opposite to each other on the base 3 for fixing the relative brackets 2, and a clamping mechanism 8 arranged on the base 3 for clamping the capacitor body 1 and the two brackets 2; specifically, the width of the positioning groove 6 is greater than the length of the support base body 221, so as to facilitate fine adjustment of the position between the brackets 2 and the capacitor body 1.

[0039] The base 3 has multiple weight-reducing holes 31 spaced apart on it.

[0040] The fixing mechanism 7 includes a fixing block 71 detachably mounted on the base 1 and a fixing member 72 disposed between the fixing block 71 and the base 3. Specifically, the fixing block 71 is provided with a fixing part 711 for fixing the support foot 22. The fixing part 711 and the opposite surface of the limiting block 222 form a fixing groove 712 for the arc-shaped limiting segment 225 of the limiting block 222 to be inserted. The fixing member 72 includes a first fixing hole 721 disposed on the fixing block 71, a second fixing hole 722 disposed on the base 3 opposite to the first fixing hole 721, and a fixing bolt 723 that passes through the first fixing hole 721 and engages with the second fixing hole 722.

[0041] The clamping mechanism 8 includes two clamping blocks 81 disposed opposite to the sides of the two brackets 2 and a clamping member 82 disposed between the clamping blocks 81 and the base 3. Specifically, the clamping blocks 81 are located above the fixed blocks 71, and their opposite surfaces to the connecting frame 21 form a limiting groove 811 adapted to the lead wire groove 212. Through the cooperation of the limiting groove 811 and the lead wire groove 212, the clamping position between the clamping blocks 81 and the brackets 2 can be quickly adjusted. The clamping member 82 includes two first clamping holes 821 disposed opposite to the sides of the clamping blocks 81, two second clamping holes 822 disposed on the mounting base 4 respectively opposite to the two first clamping holes 821, and clamping members disposed in the two second clamping holes 822 respectively. The positioning magnet 823 and the clamping bolt 824, which passes through the first clamping hole 821 and is in contact with the relative positioning magnet 823, provide the clamping force required during reflow soldering by adjusting the position of the clamping bolt 824 to be in contact with the relative positioning magnet 823; and provide a small clamping attraction during the welding process to allow the capacitor to undergo slight deformation under the action of thermal expansion and contraction, thereby avoiding the capacitor from falling apart or the capacitor body 1 from cracking; furthermore, the bottom of the clamping block 81 forms two inwardly extending support plates 812 for receiving the two support plates 211 respectively; when the clamping block 81 clamps the capacitor body 1 and the bracket 2, the two support plates 812 respectively receive the relative support plates 211.

[0042] When assembling the pulse support capacitor, first fix the capacitor body 1 in the mounting groove 5, then install the two supports 2 in the two positioning grooves 6 respectively so that the supports 2 are in contact with the end electrodes 12 of the capacitor body 1; then pre-fix the fixing block 71 on the base 1 with the fixing bolt 723. At this time, the limiting block 222 is embedded in the fixing groove 712, and the fixing bolt 712 is not fully tightened on the base 3; then, the positioning magnet 823 cooperates with the clamping bolt 824 to clamp the capacitor body 1 and the two supports 2 between the two clamping blocks 81; finally, tighten the fixing bolt 723 to complete the assembly of the pulse support capacitor.

[0043] This application defines the structure of the pulse support capacitor by setting a discharge resistor 13 on its surface. This allows the pulse support capacitor to form a path with the discharge resistor 13 after a circuit interruption, releasing the residual energy of the capacitor through the discharge resistor 13 and improving circuit safety. Furthermore, the structure of the support 2 is defined by improving the reliability of the support capacitor against mechanical vibration through the cooperation between the connecting frame 22, the connecting lead 23, and the support foot 22. This ensures that the prepared pulse support capacitor meets market demands. At the same time, the structure of the reflow soldering fixture is further defined by fixing the support 2 with the end of the capacitor body 1 by the fixing mechanism 7, and then clamping the assembled capacitor body 1 and support 2 by the clamping mechanism 8 to meet the clamping force required for the support capacitor during reflow soldering, thus meeting the requirements of mass production and effectively improving production efficiency.

[0044] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A pulse support capacitor with a bleeder resistor, characterized in that: The capacitor includes a capacitor body and two supports disposed on opposite sides of the capacitor body. The capacitor body includes a capacitor chip, two end electrodes disposed opposite to both ends of the capacitor chip, and a discharge resistor disposed on the top surface of the capacitor chip and connected between the two end electrodes. The two supports are respectively connected to the two end electrodes. Each support includes a connecting frame connected to the end electrodes, a support foot disposed below the connecting frame and connected to a circuit board, and a connecting lead disposed between the frame and the support foot. The connecting lead includes a positioning part connected to the support foot and two extension parts that are disposed opposite to each other on both sides of the positioning part and extend upward to connect to the connecting frame. The connecting frame extends outward from the opposite surface of the end electrode to form a lead groove for the extension parts to be embedded. The lead groove is inclinedly arranged on the connecting frame.

2. A pulse support capacitor with a bleeder resistor according to claim 1, characterized in that: The support foot includes a support foot body and a limiting block disposed on the support foot body for fixing the positioning part, the limiting block having a clearance hole for the positioning part to pass through.

3. A pulse support capacitor with a bleeder resistor according to claim 1, characterized in that: The capacitor body also includes a protective layer disposed on the surface of the discharge resistor.

4. The method for preparing a pulse support capacitor with a bleeder resistor according to claim 1, characterized in that: The capacitor body and two supports are fixed on the reflow soldering fixture, and then the reflow soldering fixture with the capacitor body and two supports is sent into the reflow oven for reflow soldering to obtain the pulse support capacitor. The reflow soldering fixture includes a base, a mounting groove on the base for mounting the capacitor body, two positioning grooves on the base located on both sides of the mounting groove for mounting brackets, two fixing mechanisms on the base for fixing opposite brackets, and a clamping mechanism on the base for clamping the capacitor body and the two brackets. When assembling a pulse support capacitor, first fix the capacitor body in the mounting slot, then install the two supports in the two positioning slots respectively so that the supports are in contact with the end electrodes of the capacitor body; then the fixing mechanism pre-positions the opposing supports; then the clamping mechanism clamps the two supports at both ends of the capacitor body, and the fixing mechanism fixes the supports to complete the assembly of the pulse support capacitor.

5. The method for preparing a pulse support capacitor with a bleeder resistor according to claim 4, characterized in that: The fixing mechanism includes a fixing block detachably mounted on the base and a fixing member disposed between the fixing block and the base. The fixing block is provided with a fixing part for fixing the support foot.

6. The method for preparing a pulse support capacitor with a bleeder resistor according to claim 5, characterized in that: The fastener includes a first fixing hole on the fixing block, a second fixing hole on the base opposite to the first fixing hole, and a fixing bolt that passes through the first fixing hole and engages with the second fixing hole.

7. The method for preparing a pulse support capacitor with a bleeder resistor according to claim 4, characterized in that: The clamping mechanism includes two clamping blocks disposed opposite to each other on the sides of the two supports and a clamping member disposed between the clamping blocks and the base, wherein the clamping blocks are located above the fixing mechanism.

8. A method for preparing a pulse support capacitor with a bleeder resistor according to claim 7, characterized in that: The clamping component includes two first clamping holes disposed opposite to each other on both sides of the clamping block, two second clamping holes disposed on the base opposite to the two first clamping holes, positioning magnets disposed in the two second clamping holes, and clamping bolts passing through the first clamping holes and fitting against the opposite positioning magnets.

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