Multi-core-group pulse capacitor and preparation method thereof

Abstract

The invention discloses a multi-core-group pulse capacitor and a preparation method thereof, the multi-core-group pulse capacitor comprises a frame, a plurality of capacitor bodies and a protective shell, and the frame comprises a first frame, a second frame and a plurality of bonding pad assemblies; the first frame comprises a first leading-out end and a plurality of first phase connecting rods arranged on the first leading-out end at intervals; the second frame comprises a second leading-out end opposite to the first leading-out end and a plurality of second-phase connecting rods arranged on the second leading-out end at intervals, and the first-phase connecting rods and the second-phase connecting rods are alternately arranged at intervals; according to the multi-core-group pulse capacitor, the structure of the multi-core-group pulse capacitor is limited, a plurality of large-size capacitor chips and a frame are used for product combination welding and then mold pressing is performed, and after mold pressing, a protective shell continues to be additionally arranged to serve as a structural reinforcing part; the mechanical property of the product is effectively improved, and the product has extremely high shock resistance and environmental adaptability.

Description

Technical Field

[0001] The invention belongs to the field of pulse capacitor preparation, and in particular relates to a multi-core pulse capacitor and a preparation method thereof. Background Art

[0002] At present, in order to increase the capacitance value and energy storage energy of the existing pulse power capacitors, multiple capacitors are usually connected in parallel as energy storage units. During preparation, multiple capacitors are stacked between two opposite frames, and lead terminals are set on the frames. However, the existing large-size chip molded pulse capacitors are limited by the characteristics of the molded materials. When the size and chip reach a certain level, cracking and delamination are prone to occur, which needs further improvement. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a multi-core pulse capacitor and a preparation method thereof.

[0004] The present invention adopts the following technical solution: A multi-core pulse capacitor comprises a frame, a plurality of capacitor bodies and a protective shell, wherein the frame comprises a first frame, a second frame and a plurality of pad assemblies; A first frame includes a first lead-out end and a plurality of first connecting rods spaced apart on the first lead-out end; The second frame comprises a second lead-out end opposite to the first lead-out end, a plurality of second connecting rods arranged at intervals on the second lead-out end, and the plurality of the first connecting rods and the plurality of the second connecting rods are arranged alternately at intervals; A plurality of welding plate assemblies are arranged between adjacent first connecting rods and second connecting rods, wherein the welding plate assemblies include a plurality of first welding plates arranged at intervals on the first connecting rods and a plurality of second welding plates arranged on the adjacent second connecting rods opposite to the plurality of first welding plates, or a plurality of first welding plates arranged at intervals on the second connecting rods and a plurality of second welding plates arranged on the adjacent first connecting rods opposite to the plurality of first welding plates; A plurality of capacitor bodies are respectively arranged between the first welding pad and the second welding pad which are opposite to each other, and the capacitor bodies include two capacitor chips which are stacked up and down and arranged on the top and bottom surfaces of the first welding pad and the second welding pad, and a molded shell covering the outer periphery of the two capacitor chips; The protective casing is arranged on the periphery of the plurality of capacitor bodies.

[0005] Furthermore, the protective shell includes a first shell and a second shell disposed opposite to each other up and down, and a positioning mechanism disposed between the first shell and the second shell. A plurality of mounting grooves for mounting a plurality of capacitor bodies are formed on the top surface of the second shell.

[0006] Furthermore, the positioning mechanism includes two elastic protective strips relatively arranged between the first shell and the second shell and two positioning components respectively arranged between the two elastic protective strips and the first shell and the second shell, and the positioning components include a plurality of first positioning holes arranged on the first shell, a plurality of second positioning holes arranged on the second shell opposite to the plurality of first positioning holes, a plurality of third positioning holes arranged on the elastic protective strip opposite to the first positioning holes, and a plurality of positioning bolts respectively passing through the plurality of first positioning holes, the third positioning holes and cooperating with the relative second positioning holes.

[0007] Furthermore, the two elastic protection strips are respectively formed with pin holes for the first lead-out end and the second lead-out end to extend out.

[0008] Furthermore, the first shell is provided with a plurality of first exhaust holes, the second shell is provided with second exhaust holes opposite to the plurality of first exhaust holes, and the plurality of exhaust holes are opposite to the plurality of mounting grooves one by one.

[0009] Furthermore, the first welding pad includes a first connecting section connected to the first connecting rod or the second connecting rod and a first welding pad arranged on one side of the first connecting section and extending in a direction close to the adjacent second connecting rod or the first connecting rod, the second welding pad includes a second connecting section connected to the first connecting rod or the second connecting rod and a second welding pad arranged on one side of the second connecting section and extending in a direction close to the adjacent second connecting rod or the first connecting rod, the second welding pad is arranged between the first connecting rod and the second connecting rod opposite to the first welding pad, and the capacitor chip is arranged between the first welding pad and the second welding pad.

[0010] Furthermore, the first connecting section is formed with a first connecting groove extending downward from its top surface for the first connecting rod or the second connecting rod to be embedded in, and the second connecting section is formed with a second connecting groove extending upward from its bottom surface for the first connecting rod or the second connecting rod to be embedded in, a gap is formed between the side surface of the first connecting groove and the first connecting rod or the second connecting rod, and a gap is formed between the side surface of the second connecting groove and the first connecting rod or the second connecting rod.

[0011] Furthermore, the second connecting section is buckled with the first connecting section located on the same first connecting rod or the second connecting rod up and down, and is respectively located on both sides of the first connecting rod or the second connecting rod.

[0012] A method for preparing a multi-core pulse capacitor comprises the following steps: Step 1, place multiple capacitor chips one by one on the welding base, and apply solder paste on the end of the capacitor chip; Step 2, placing the frame on a plurality of capacitor chips, so that the first welding pad and the second welding pad that are opposite to each other are in contact with the two ends of the capacitor chips respectively, and then stacking a plurality of capacitor chips on the plurality of capacitor chips respectively, so that the top surface and the bottom surface of the first welding pad and the second welding pad that are opposite to each other are respectively equipped with capacitor chips; Step 3, the pressing block is welded on the welding base, the plurality of capacitor chips and the frame are limited and fixed, and then sent to the reflow soldering for welding; Step 4, after welding is completed, remove the welding block and the welding base to obtain a capacitor group, and then send the capacitor group to a molding device to form a molded shell for the two capacitor chips stacked up and down, and then put a protective shell around the periphery of multiple capacitor bodies to obtain the multi-core pulse capacitor.

[0013] Furthermore, the welding base includes a plurality of product grooves for placing capacitor chips and a plurality of first transverse exhaust grooves and a first vertical exhaust groove arranged at intervals, the welding block includes a plurality of limiting grooves opposite to the plurality of product grooves and a plurality of second transverse exhaust grooves and a second vertical exhaust groove arranged at intervals, the plurality of first transverse exhaust grooves are opposite to the plurality of second transverse exhaust grooves, the plurality of first vertical exhaust grooves are opposite to the second vertical exhaust grooves, and the plurality of capacitor chips located on the upper layer are limited in the plurality of limiting grooves.

[0014] From the above description of the present invention, it can be seen that compared with the prior art, the beneficial effects of the present invention are as follows: the present application defines the structure of a multi-core pulse capacitor, uses several large-size capacitor chips and frames for product combination welding and then molds, and continues to install a protective shell after molding as a structural reinforcement, which effectively improves the mechanical properties of the product and has extremely strong seismic resistance and environmental adaptability. Among them, the structure of the frame is specifically defined, and the structure of the welding disk assembly is further defined, so that after the frame is assembled with several large-size capacitor chips, it can be molded to form a capacitor group, ensuring that the prepared multi-core pulse capacitor is not prone to cracking and delamination during subsequent use, and has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a multi-core pulse capacitor; Figure 2 It is a disassembled schematic diagram of a multi-core pulse capacitor; Figure 3 is a structural schematic diagram of the first shell; Figure 4 A schematic diagram of the partial structure of a multi-core pulse capacitor Figure 1 ; Figure 5 A schematic diagram of the partial structure of a multi-core pulse capacitor Figure 2 ; Figure 6It is a structural diagram of the framework; Figure 7 for Figure 6 A partial enlarged view of the structure; Figure 8 It is a schematic diagram of the state of the welding base and the welding pressing block; Fig. 9 Schematic diagram of the structure of the welding base and welding block Figure 1 ; Fig.10 Schematic diagram of the structure of the welding base and welding block Figure 2 ; In the figure, 1-frame, 2-capacitor body, 3-protective shell, 4-first frame, 5-second frame, 6-pad assembly, 7-welding base, 8-welding block, 21-capacitor chip, 22-molded shell, 31-first shell, 311-positioning groove, 312-first exhaust hole, 32-second shell, 321-mounting groove, 322-second exhaust hole, 33-positioning mechanism, 331-elastic protection strip, 332-positioning assembly, 333-first positioning hole, 334-second positioning hole, 335-third positioning hole, 336-positioning bolt, 337-pin hole, 41-first lead-out terminal, 42-first connecting rod, 43-first pin, 44-first connecting rod Connecting rod, 441-first connecting part, 442-connecting groove, 51-second lead-out end, 52-second connecting rod, 53-second pin, 54-second connecting rod, 61-first welding pad, 611-first connecting section, 612-first welding pad, 613-first connecting groove, 614-first vertical section, 615-second vertical section, 616-horizontal section, 62-second welding pad, 621-second connecting section, 622-second welding pad, 623-second connecting groove, 71-product groove, 72-first horizontal exhaust groove, 73-first vertical exhaust groove, 74-guide hole, 81-second horizontal exhaust groove, 82-second vertical exhaust groove, 83-guide column, 84-limiting groove. DETAILED DESCRIPTION

[0016] The present invention is further described below through specific implementation modes.

[0017] Reference Figures 1 to 10 As shown, a multi-core pulse capacitor includes a frame 1, a plurality of capacitor bodies 2 and a protective shell 3.

[0018] The frame 1 includes a first frame 4 , a second frame 5 and a plurality of pad assemblies 6 .

[0019] The first frame 4 includes a first lead-out terminal 41 and a plurality of first connecting rods 42 spaced apart on the first lead-out terminal 41, wherein the first lead-out terminal 41 includes a first pin 43 and a first connecting rod 44 connected to the first pin 43, and the plurality of first connecting rods 42 are connected to the first connecting rod 44; specifically, the first connecting rod 44 is formed with a plurality of first connecting portions 441 connected to the plurality of first connecting rods 42, the first connecting portion 441 includes a connecting groove 442 extending upward from its bottom surface for embedding relative to the first connecting rod 42, and further, the first connecting rod 42 is a copper rod.

[0020] The second frame 5 includes a second lead-out end 51 opposite to the first lead-out end 41 and a plurality of second connecting rods 52 spaced apart from each other at the second lead-out end 51, wherein the plurality of first connecting rods 42 and the plurality of second connecting rods 52 are spaced apart and alternately arranged; specifically, the second lead-out end 51 includes a second pin 53 and a second connecting rod 54 connected to the second pin 53, and the plurality of second connecting rods 52 are connected to the second connecting rod 54 in the same manner as the first connecting rod 44 and the first connecting rod 42, which will not be described here. To further elaborate, in addition, the first pin 43 and the second pin 53 are staggered front and back; further, the number of the first connecting rods 42 is greater than the number of the second connecting rods 52, and the number of the second connecting rods 52 is odd, and the number of the first connecting rods 42 is plural, so that the two sides of the frame 1 are just the first connecting rods 42, and the multiple second connecting rods 52 and the remaining first connecting rods are alternately arranged between the two first connecting rods 42 located at the end; further, the second connecting rods 52 are copper rods.

[0021] A plurality of pad assemblies 6 are arranged between adjacent first connecting rods 42 and second connecting rods 52, and the pad assemblies 6 include a plurality of first welding pads 61 arranged at intervals on the first connecting rods 42 and a plurality of second welding pads 62 arranged on the adjacent second connecting rods 52 opposite to the plurality of first welding pads 61, or a plurality of first welding pads 61 arranged at intervals on the second connecting rods 52 and a plurality of second welding pads 62 arranged on the adjacent first connecting rods 42 opposite to the plurality of first welding pads 61.

[0022] The first welding plate 61 includes a first connecting section 611 connected to the first connecting rod 42 or the second connecting rod 52 and a first welding plate 612 arranged on one side of the first connecting section 611 and extending in a direction close to the adjacent second connecting rod 52 or the first connecting rod 42. The first connecting section 611 is formed with a first connecting groove 613 extending downward from its top surface for the first connecting rod 42 or the second connecting rod 52 to be embedded. Specifically, the first connecting section 611 includes a first vertical section 614 and a second vertical section 615 arranged opposite to each other, and a first vertical section 616 arranged on the first vertical section 617. A horizontal section 616 is formed between the straight section 614 and the second vertical section 615, wherein the height of the first vertical section 614 is lower than the height of the second vertical section 615, a first connecting groove 613 is formed between the first vertical section 614 and the second vertical section 615, and a first welding pad 612 is connected to the top of the first vertical section 614; further, a gap is formed between the side of the first connecting groove 613 and the first connecting rod 42 or the second connecting rod 52, allowing the first welding pad 61 to deform appropriately, and its connection strength remains unchanged during the deformation process.

[0023] The second welding plate 62 includes a second connecting section 621 connected to the first connecting rod 42 or the second connecting rod 52 and a second welding plate 622 arranged on one side of the second connecting section 621 and extending in a direction close to the adjacent second connecting rod 52 or the first connecting rod 42, wherein the second welding plate 622 is arranged between the first connecting rod 42 and the second connecting rod 52 relative to the first welding plate 612. Specifically, the second connecting section 621 is formed with a second connecting groove 623 extending upward from its bottom surface for the first connecting rod 42 or the second connecting rod 52 to be embedded, and a gap is formed between the side surface of the second connecting groove 623 and the first connecting rod 42 or the second connecting rod 52. Further, the second connecting section 621 is connected to the second connecting rod 42 or the second connecting rod 52 located on the same The first connecting section 611 on a connecting rod 42 or a second connecting rod 52 is buckled up and down and is respectively located on both sides of the first connecting rod 42 or the second connecting rod 52, so that the second vertical section 615 of the first connecting section 611 can extend into the second connecting groove 623 opposite to it up and down, and the end of the second connecting section 621 can extend into the opposite first connecting groove 613. At this time, a gap is formed between the outer side of the second vertical section 615 and the side wall of the second connecting groove 623, and a gap is formed between the outer side of the end of the second connecting section 621 and the side wall of the first connecting groove 613, thereby allowing the first welding plate 61 and the second welding plate 62 located on the same connecting rod to have appropriate deformation, and their connection strength remains unchanged during the deformation process.

[0024] Multiple capacitor bodies 2 are respectively arranged between the opposite first solder pads 612 and second solder pads 622, wherein the capacitor body 2 includes two capacitor chips 21 stacked up and down and arranged on the top and bottom surfaces of the first solder pad 612 and the second solder pad 622, and a molded shell 22 covering the outer periphery of the two capacitor chips 21.

[0025] The protective shell 3 is arranged on the periphery of the plurality of capacitor bodies 2, and includes a first shell 31 and a second shell 32 which are arranged opposite to each other up and down, and a positioning mechanism 33 which is arranged between the first shell 31 and the second shell 32, wherein the top surface of the second shell 32 is formed with a plurality of mounting grooves 321 for mounting the plurality of capacitor bodies 2 and a plurality of second exhaust holes 322 which are respectively arranged in the plurality of mounting grooves 321, and the bottom surface of the first shell 31 is formed with a plurality of positioning grooves 311 which are opposite to the plurality of mounting grooves 321 and a plurality of first exhaust holes 312 which are opposite to the plurality of second exhaust holes 322. By limiting the structure of the protective shell 3, the first shell 31 and the second shell 32 form external protection for the plurality of capacitor bodies 2, so as to enhance their impact resistance and prevent the frame 1 from deforming and bending, thereby affecting the use of the pulse capacitor, and the first exhaust holes 312 and the second exhaust holes 322 are respectively arranged on the first shell 313 and the second shell 2, so as to avoid residual moisture in the closed structure and improve the stability of the pulse capacitor.

[0026] The positioning mechanism 33 includes two elastic protective strips 331 relatively arranged between the first shell 31 and the second shell 32 and two positioning components 332 respectively arranged between the two elastic protective strips 331 and the first shell 31 and the second shell 32, wherein the positioning component 332 includes a plurality of first positioning holes 333 arranged on the first shell 31, a plurality of second positioning holes 334 arranged on the second shell 32 and opposite to the plurality of first positioning holes 333, a plurality of third positioning holes 335 arranged on the elastic protective strip 331 and opposite to the first positioning holes 333, and a plurality of positioning bolts 336 respectively passing through the plurality of first positioning holes 333, the third positioning holes 335 and cooperating with the second positioning holes 334. The elastic protective strip 331 is arranged between the first shell 31 and the second shell 32, so as to protect the shell 3 from being squeezed and rebounding after deformation, thereby improving the mechanical properties and environmental adaptability of the product; specifically, the two elastic protective strips 331 are respectively formed with pin holes 337 for the first pin 43 and the second pin 53 to extend out.

[0027] The preparation method specifically comprises the following steps: Step 1, placing multiple capacitor chips 21 one by one on the welding base 7, and applying solder paste on the end positions of the capacitor chips 21; Step 2, placing the frame 1 on a plurality of capacitor chips 21, so that the first welding pad 61 and the second welding pad 62 that are opposite to each other are in contact with the two ends of the capacitor chip 21, and then stacking a plurality of capacitor chips on the plurality of capacitor chips 21, so that the top surface and the bottom surface of the first welding pad 61 and the second welding pad 62 that are opposite to each other are respectively equipped with capacitor chips 21; Step 3, the pressing block 8 is welded on the welding base 7, the plurality of capacitor chips 21 and the frame 1 are fixed in position, and then sent to the reflow soldering for welding; Step 4, after welding is completed, the welding block 8 and the welding base 7 are removed to obtain a capacitor bank, and then the capacitor bank is sent to a molding device to form a molded housing 22 with two capacitor chips 21 stacked up and down; Step 5, a protective shell 3 is sleeved on the outer periphery of multiple capacitor bodies 2, wherein the capacitor group is placed on the top surface of the second shell 32 so that the lower ends of the multiple capacitor bodies 2 are embedded in the multiple relative installation grooves 321, and then two elastic protective strips 331 are placed on the top surface of the second shell 32 so that the third positioning holes 335 on the elastic protective strips 331 are opposite to the relative first positioning holes 333, and then the first shell 31 is placed on the top of the capacitor group so that the top of the capacitor body 2 is embedded in the relative positioning groove 311, and then the positioning bolts 336 are tightened to fix the capacitor group in the protective shell 3, so as to obtain a multi-core pulse capacitor.

[0028] Among them, the welding base 7 includes a plurality of product grooves 71 for placing the capacitor chip 21 and a plurality of first horizontal exhaust grooves 72 and a first vertical exhaust groove 73 arranged at intervals. The welding block 8 includes a plurality of limiting grooves 84 opposite to the plurality of product grooves 71 and a plurality of second horizontal exhaust grooves 84 and a second vertical exhaust groove 82 arranged at intervals. The plurality of first horizontal exhaust grooves 72 are opposite to the plurality of second horizontal exhaust grooves 81, and the plurality of first vertical exhaust grooves 73 are opposite to the second vertical exhaust grooves 82. During reflow soldering, the plurality of capacitor chips located on the upper layer are respectively limited in the plurality of limiting grooves 84. Specifically, guide columns 83 are respectively arranged at both ends of the bottom surface of the welding block 8, and two guide holes 74 cooperating with the two positioning columns 83 are formed on the top surface of the welding base 7. Through the cooperation between the guide columns 83 and the guide holes 74, the welding pressure plate 8 can be quickly molded with the welding base 7.

[0029] The present application defines the structure of a multi-core pulse capacitor, uses a plurality of large-size capacitor chips and a frame 21 to weld the product together and then mold it, and then continues to install a protective shell 3 after molding as a structural reinforcement, which effectively improves the mechanical properties of the product and has extremely strong shock resistance and environmental adaptability. Among them, the structure of the frame 1 is specifically defined, and the structure of the welding disk assembly 6 is further defined, so that after the frame is assembled with a plurality of large-size capacitor chips, it can be molded to form a capacitor group, ensuring that the prepared multi-core pulse capacitor is not prone to cracking and stratification during subsequent use, and has high reliability.

[0030] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of implementation of the present invention. That is, equivalent changes and modifications made according to the application scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A multi-core pulse capacitor, characterized in that: The invention comprises a frame, a plurality of capacitor bodies and a protective shell, wherein the frame comprises a first frame, a second frame and a plurality of pad assemblies; A first frame includes a first lead-out end and a plurality of first connecting rods spaced apart on the first lead-out end; The second frame comprises a second lead-out end opposite to the first lead-out end, a plurality of second connecting rods arranged at intervals on the second lead-out end, and the plurality of the first connecting rods and the plurality of the second connecting rods are arranged alternately at intervals; A plurality of welding plate assemblies are arranged between adjacent first connecting rods and second connecting rods, wherein the welding plate assemblies include a plurality of first welding plates arranged at intervals on the first connecting rods and a plurality of second welding plates arranged on the adjacent second connecting rods opposite to the plurality of first welding plates, or a plurality of first welding plates arranged at intervals on the second connecting rods and a plurality of second welding plates arranged on the adjacent first connecting rods opposite to the plurality of first welding plates; A plurality of capacitor bodies are respectively arranged between the first welding pad and the second welding pad opposite to each other, and the capacitor bodies include two capacitor chips stacked up and down and arranged on the top and bottom surfaces of the first welding pad and the second welding pad, and a molded shell covering the outer periphery of the two capacitor chips; The protective casing is arranged on the periphery of the plurality of capacitor bodies.

2. A multi-core pulse capacitor according to claim 1, characterized in that: The protective shell comprises a first shell and a second shell which are arranged opposite to each other up and down, and a positioning mechanism arranged between the first shell and the second shell. A plurality of mounting grooves for mounting a plurality of capacitor bodies are formed on the top surface of the second shell.

3. A multi-core pulse capacitor according to claim 2, characterized in that: The positioning mechanism includes two elastic protective strips relatively arranged between the first shell and the second shell and two positioning components respectively arranged between the two elastic protective strips and the first shell and the second shell. The positioning components include a plurality of first positioning holes arranged on the first shell, a plurality of second positioning holes arranged on the second shell opposite to the plurality of first positioning holes, a plurality of third positioning holes arranged on the elastic protective strip opposite to the first positioning holes, and a plurality of positioning bolts respectively passing through the plurality of first positioning holes, the third positioning holes and cooperating with the second positioning holes relative to the first positioning holes.

4. A multi-core pulse capacitor according to claim 2, characterized in that: The two elastic protection strips are respectively formed with pin holes for the first lead-out end and the second lead-out end to extend out.

5. The multi-core pulse capacitor according to claim 2, characterized in that: The first shell is provided with a plurality of first exhaust holes, and the second shell is provided with second exhaust holes opposite to the plurality of first exhaust holes, and the plurality of exhaust holes are opposite to the plurality of mounting grooves one by one.

6. The multi-core pulse capacitor according to claim 1, characterized in that: The first welding pad includes a first connecting section connected to the first connecting rod or the second connecting rod and a first welding pad arranged on one side of the first connecting section and extending in a direction close to the adjacent second connecting rod or the first connecting rod; the second welding pad includes a second connecting section connected to the first connecting rod or the second connecting rod and a second welding pad arranged on one side of the second connecting section and extending in a direction close to the adjacent second connecting rod or the first connecting rod; the second welding pad is arranged between the first connecting rod and the second connecting rod opposite to the first welding pad; and the capacitor chip is arranged between the first welding pad and the second welding pad.

7. A multi-core pulse capacitor according to claim 6, characterized in that: The first connecting section is formed with a first connecting groove extending downward from its top surface for the first connecting rod or the second connecting rod to be embedded in, and the second connecting section is formed with a second connecting groove extending upward from its bottom surface for the first connecting rod or the second connecting rod to be embedded in, a gap is formed between the side surface of the first connecting groove and the first connecting rod or the second connecting rod, and a gap is formed between the side surface of the second connecting groove and the first connecting rod or the second connecting rod.

8. The multi-core pulse capacitor according to claim 6, characterized in that: The second connecting section is buckled with the first connecting section located on the same first connecting rod or the second connecting rod up and down, and is respectively located on both sides of the first connecting rod or the second connecting rod.

9. The method for preparing a multi-core pulse capacitor according to claim 1, characterized in that: The following steps are involved: Step 1, place multiple capacitor chips one by one on the welding base, and apply solder paste on the end of the capacitor chip; Step 2, placing the frame on a plurality of capacitor chips, so that the first welding pad and the second welding pad that are opposite to each other are in contact with the two ends of the capacitor chips respectively, and then stacking a plurality of capacitor chips on the plurality of capacitor chips respectively, so that the top surface and the bottom surface of the first welding pad and the second welding pad that are opposite to each other are respectively equipped with capacitor chips; Step 3, the pressing block is welded on the welding base, the plurality of capacitor chips and the frame are limited and fixed, and then sent to the reflow soldering for welding; Step 4, after welding is completed, remove the welding block and the welding base to obtain a capacitor group, and then send the capacitor group to a molding device to form a molded shell for the two capacitor chips stacked up and down, and then put a protective shell around the periphery of multiple capacitor bodies to obtain the multi-core pulse capacitor.

10. The method for preparing a multi-core pulse capacitor according to claim 9, characterized in that: The welding base includes a plurality of product grooves for placing capacitor chips and a plurality of first transverse exhaust grooves and a first vertical exhaust groove arranged at intervals. The welding block includes a plurality of limiting grooves opposite to the plurality of product grooves and a plurality of second transverse exhaust grooves and a second vertical exhaust groove arranged at intervals. The plurality of first transverse exhaust grooves are opposite to the plurality of second transverse exhaust grooves, and the plurality of first vertical exhaust grooves are opposite to the second vertical exhaust grooves. The plurality of capacitor chips located on the upper layer are limited in the plurality of limiting grooves.

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