Transverse welding capacitor
By designing bendable welding pins and explosion-proof nets in the capacitor, the problem of short welding pins of existing large-capacity capacitors is solved, and the horizontal installation and stability of the capacitors are achieved, which is suitable for thinner products.
Patent Information
- Application Number
- CN202420005004.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-02
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-01-02
AI Technical Summary
The existing large-capacity horn capacitors have short soldering pins, which cannot achieve horizontal installation of capacitors, limiting their application in thinner products.
A transverse welding capacitor is designed. By installing aluminum rivets and bent parts on the cover plate of the welding needle, the welding needle can be bent on the same side, achieving the horizontal installation of the capacitor, and preventing excessive internal pressure from being caused by excessive pressure in the capacitor through the explosion-proof net. Cracking.
It realizes the horizontal fixation of the capacitor and the installation of large-capacitance capacitors, which are suitable for thinner products, and enhances the installation flexibility and stability of the capacitors.
Smart Images
Figure CN222260810U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of capacitors, in particular to a transversely welded capacitor. Background Art
[0002] In recent years, the demand for miniaturization and space saving of power supplies in the fields of server power supplies and switching power supplies has been increasing. In addition, as the integration of circuits has led to a reduction in internal space, the temperature around the power supply has also tended to increase. However, the lead product diameter can only be 22mm in diameter and less than 50mm in height. Some high-voltage and high-capacity products can only be made into horns. However, the welding pins of horn capacitors are short and can only be fixed upright, so they cannot be used in thinner products.
[0003] As disclosed in Chinese patent CN210349585U, published on April 17, 2020, this utility model relates to the field of capacitors, and in particular to a vibration-resistant horn capacitor, including an outer shell and an inner core, two pins are led out from the top of the inner core, one end of the pin is arranged outside the outer shell, a heat sink is fixed to the bottom of the outer shell, the inner core is arranged on one side of the heat sink, and a plurality of buffer springs are connected to the other side of the heat sink, a groove is arranged on the outer side of the outer shell, one end of the groove is recessed into the inner shell to form a convex block, and a limit plate for fixing one end of the pin is arranged at the lower end of the convex block, a heat conducting plate is bonded on both sides of the inner core, and at least two buffer pads are arranged on one side of the heat conducting plate, and the buffer pads are also connected to the inner wall of the outer shell. The welding pins of this capacitor are short, and the capacitor cannot be fixed laterally. Utility Model Content
[0004] The technical problem to be solved by the utility model is that the existing large-capacity horn capacitor welding pins are short and cannot be installed horizontally. A horizontal welding capacitor is proposed, which has a long welding pin and can realize the horizontal installation of the capacitor.
[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a transversely welded capacitor, including a capacitor body, the top of the capacitor body is connected to the welding pin cover plate, the welding pin cover plate is provided with a plurality of aluminum rivets, the aluminum rivets and the welding pin cover plate are perpendicular to each other, and the aluminum rivets are connected to the welding pin.
[0006] A transversely welded capacitor, a welding pin cover plate is fixed on the top of the capacitor body, two aluminum rivets are fixed on the welding pin cover plate, the aluminum rivets and the welding pin cover plate are perpendicular to each other, so that the welding pins fixed on the aluminum rivets are parallel to each other, so that the welding pins can be bent on the same side to achieve the same side installation of the capacitor.
[0007] Preferably, the capacitor body has a diameter of 22 to 42 mm, and the welding pin has a length of 17 to 27 mm. The capacitor body can have a diameter of 22 to 42 mm, and the welding pin can have a length of 17 to 27 mm. Under the premise of meeting the large capacity requirement, the capacitor can be installed horizontally by bending the welding pin.
[0008] Preferably, the soldering pin is provided with a bending portion, the soldering pin portion between the bending portion and the soldering pin cover plate is a first bending section, the portion of the soldering pin connected to the first bending section is a second bending section, and the soldering pins have the same bending direction. The soldering pin is divided into a first bending section and a second bending section through the bending portion, and the second bending portion is used to connect to the circuit board.
[0009] Preferably, the distance between adjacent welding pins is 10-15 mm. The distance between two welding pins of the capacitor is designed according to the diameter of the capacitor and the length of the welding pin. The larger the diameter of the capacitor and the longer the welding pin, the larger the distance between the two welding pins.
[0010] Preferably, the length of the second bending section is greater than half of the difference between the capacitor body diameter and the distance between adjacent solder pins. The second bending section needs to ensure that it extends out of the range of the capacitor diameter so as to contact the circuit board.
[0011] Preferably, the aluminum rivet is provided with a raised portion, the aluminum rivet is connected to an annular buckle, a fixing groove is formed between the raised portion and the annular buckle, and the welding pin cover is located in the fixing groove. A fixing groove is formed between the raised portion and the annular buckle to fix the welding pin cover, thereby fixing the aluminum rivet and the capacitor.
[0012] Preferably, the welding pin cover plate comprises a low-chloride plate, and the top of the low-chloride plate is connected to EPDM. The surface of the capacitor is coated with a layer of EPDM to enhance aging resistance and electrical insulation performance.
[0013] Preferably, a welding groove is provided on the top of the aluminum rivet, and the welding pin is welded to the welding groove. The welding pin and the aluminum rivet are fixed via the welding groove, and the presence of the welding groove can enhance the connection strength between the aluminum rivet and the welding pin.
[0014] Preferably, an explosion-proof net is provided at one end of the capacitor body away from the welding pin, which can prevent the capacitor from cracking due to excessive internal pressure.
[0015] The substantial effect of the utility model is that the utility model can achieve the same-direction bending of the welding pins and the lateral fixation of the capacitors by lengthening the welding pins and arranging the welding pins and the welding pin cover plates perpendicular to each other; according to the actual situation, a longer welding pin is arranged to achieve the lateral installation of large-capacity capacitors. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 A capacitor structure diagram of an embodiment;
[0017] Figure 2 It is a partial enlarged view of the welding pin cover plate of the embodiment.
[0018] Among them: 1. capacitor body, 2. welding pin cover plate, 21. low-chlorine plate, 22. EPDM rubber, 3. welding pin, 31. bending part, 32. first bending section, 33. second bending section, 4. explosion-proof net, 5. aluminum rivet, 51. raised part, 6. ring buckle. DETAILED DESCRIPTION
[0019] The specific implementation of the utility model is further described below through specific embodiments and in conjunction with the accompanying drawings.
[0020] A transversely welded capacitor, such as Figure 1 and Figure 2 As shown, the capacitor mainly includes three parts: capacitor body 1, solder pin cover plate 2 and solder pin 3. The capacitor body 1 is composed of elements (the elements are formed by winding anode foil, cathode foil, electrolytic paper, lead strip and tape), electrolyte, cover plate, aluminum shell and sleeve. The solder pin cover plate 2 is fixed to one end of the capacitor body 1. The solder pin 3 is fixed on the solder pin cover plate 2, and one end of the solder pin 3 is connected to the capacitor body 1, and the other end is used to connect to the circuit board, so as to connect the circuit board with the inside of the capacitor body 1.
[0021] An explosion-proof net 4 is provided at one end of the capacitor body 1 away from the welding pin 3. When the capacitor is working, the electrolyte and the element will undergo an oxidation-reduction reaction. Hydrogen and oxygen will be produced during the oxidation-reduction reaction. At this time, the gas volume inside the capacitor increases and the capacitor expands. And with the subsequent changes, hydrogen and oxygen will re-participate in the oxidation-reduction reaction. At this time, the gas volume inside the capacitor decreases, and the capacitor is re-compressed due to the toughness of the aluminum shell itself. Due to the continuous expansion and contraction of the aluminum shell, the aluminum shell may crack. Or a large amount of hydrogen and oxygen is produced at one time in the oxidation-reduction reaction, causing the expansion volume of the aluminum shell to be too large, thereby causing cracking. After the explosion-proof net 4 is provided, when the gas expands, the expansion of the explosion-proof net 4 can replace the expansion of the aluminum shell, thereby avoiding the cracking of the aluminum shell.
[0022] Two welding pins 3 are fixed on the welding pin cover plate 2. The welding pin 3 is divided into three parts, namely, a bending portion 31, a first bending section 32 and a second bending section 33. The first bending section 32 is the portion of the welding pin 3 between the bending portion 31 and the capacitor body 1, and the second bending section 33 is the portion at the upper end of the bending portion. The setting of the bending portion 31 can be adjusted according to the actual situation, thereby causing the length of the first bending section 32 and the second bending section 33 to be different. The length of the first bending section 32 can be expressed as L1, and the length of the second bending section 33 can be expressed as L2. Therefore, L1=welding pin length-L2. Normally, the length of the first bending section 32 is 2 to 3 mm. During production, the bending portion 31 will be set according to this situation, and the welding pin 3 of the capacitor will be bent. The bending direction can be to the left or to the right. When bending, the two welding pins 3 are bent in the same direction. Due to the different bending directions, the positions of the positive and negative electrodes of the capacitor are also different. During production, it is necessary to first ask the purchaser about the bending direction of the capacitor and whether there are other requirements, such as the length requirement of the first bending section 32. If the purchaser has requirements for the length of the first bending section 32, it is necessary to adjust the position of the bending portion 31 according to their opinions to ensure that the capacitor meets the customer's needs.
[0023] The capacitor body 1 has a diameter of 22 to 42 mm, and a welding pin length of 17 to 27 mm. The capacitor connected by a lead wire can only have a capacitor diameter of less than 22 mm, so it cannot have a large capacity. Large-capacity capacitors can only be installed using a horn welding pin 3, and the length of the welding pin 3 of the horn welding pin 3 is relatively small. The capacitor using the horn welding pin 3 can only be fixed vertically, and cannot be fixed horizontally, so it cannot be used in thinner products. The capacitor diameter of the utility model can reach 22 to 42 mm, and the welding pin length can reach 17 to 27 mm, which can well meet the requirements for horizontal installation of large-capacity capacitors.
[0024] The welding pin cover plate 2 is provided with two openings, and the positions of the two openings are used to fix the welding pins 3. The center point of the two openings opened on the welding cover plate is the center of the capacitor. During production, firstly, the distance between the two welding pins 3 is determined according to the needs of the customer, and then the corresponding opening is opened on the welding pin cover plate 2 for fixing the welding pins 3. The distance between the two welding pins 3 is set to L3, and the distance between the two welding pins 3 is set according to the diameter of the capacitor and the length of the welding pin 3. Since the larger the diameter of the capacitor, the longer the welding pin 3, if the distance between the two welding pins 3 is too small, the capacitor will become loose when fixed. Therefore, the distance between the two welding pins 3 is set in direct proportion to the diameter of the capacitor and the length of the welding pin 3. The larger the capacitor, the longer the welding pin 3, and the larger the distance between the two welding pins 3. The distance between the two welding pins 3 is generally 10 to 15 mm.
[0025] Only after determining the distance between the two soldering pins 3, can the position of the bending portion 31 be determined. During production, the diameter of the capacitor is first determined by the capacity required by the capacitor, and then the length of the soldering pin 3 is determined, and then the position of the bending portion 31 is determined. The determination of the bending portion 31 should not only consider the needs of the customer, but also the actual situation. The bent soldering pin 3 needs to ensure that the second bending section 33 can contact the soldered circuit board, and the length of the second bending section 33 is greater than the diameter of the capacitor body 1 minus half of the difference in the distance between adjacent soldering pins 3, that is, L2> (capacitor diameter-L3) / 2, thereby ensuring that the second bending section 33 can extend out of the area covered by the capacitor cross section, so that the second bending section 33 can touch the soldered circuit board.
[0026] Since the welding pin 3 may become loose when it is directly fixed on the welding pin cover plate 2, it needs to be reinforced by the aluminum rivet 5. The main body diameter of the aluminum rivet 5 is equivalent to the diameter of the opening on the welding pin cover plate 2. A circle of raised parts 51 is provided at the lower end of the aluminum rivet 5. When fixed, the raised parts 51 are located at the lower end of the welding pin cover plate 2. An annular buckle 6 is also sleeved and fixed on the aluminum rivet 5, and the inner diameter of the annular buckle 6 is equal to the outer diameter of the aluminum rivet 5. A fixing groove is formed between the annular buckle 6 and the raised part 51. When the aluminum rivet 5 is installed, the welding cover plate is fixed in this fixing groove. When installing, firstly insert the aluminum rivet 5 from the inner side of the welding pin cover plate 2, so that the raised part 51 fits with the inner side of the welding pin cover plate 2. Then fix the annular buckle 6 on the aluminum rivet 5, and fix the annular buckle 6 downward, so that the aluminum rivet 5 is firmly fixed on the welding pin cover plate 2. A groove is provided in the middle of one end of the aluminum rivet 5 exposed outside the capacitor, which is used for welding and fixing the welding pin 3. The size of the groove matches the diameter of the welding pin 3. When fixing, the welding end of the welding pin 3 is inserted into the groove, and then welding is performed, so as to achieve welding and fixing of the welding pin 3. After the fixing is completed, the aluminum rivet 5 and the welding pin cover plate 2 are perpendicular to each other, so that the welding pin 3 fixed on the aluminum rivet 5 is also perpendicular to the welding pin cover plate 2, so that the two welding pins 3 can be bent in the same direction. When the welding pin 3 is bent, the bending angle is generally a right angle of 90 degrees.
[0027] The welding pin cover plate 2 is mainly composed of two layers, namely a low-chlorine board 21 and an EPDM rubber 22. The low-chlorine board 21 is located in the lower layer, and the EPDM rubber 22 is located in the upper layer, and the EPDM rubber 22 and the low-chlorine board 21 are closely attached. The EPDM rubber 22 is arranged on the surface of the low-chlorine board 21 to effectively improve the insulation, and the EPDM rubber 22 has good oxidation resistance, is not easy to age, and provides good protection for the low-chlorine board 21.
[0028] When producing, it is necessary to first consult the customer for various requirements, such as the capacity of the capacitor, the position of the positive and negative poles of the capacitor, the length of the part of the soldering pin 3 reserved for connection with the circuit board, and other information. Then first determine the diameter of the capacitor according to the capacity of the capacitor, and determine the minimum length of the soldering pin 3 according to the determined diameter of the capacitor. And determine the spacing between the two soldering pins 3 according to the diameter of the capacitor. Next, determine the length of the soldering pin 3 according to the length of the part of the soldering pin 3 reserved for connection with the circuit board given by the customer and the spacing between the two soldering pins 3. At this time, the preset bending portion 31 is the position of the soldering pin 3 at 2 to 3 mm on the upper end of the soldering pin cover 2. If the customer also has requirements for the length of the first bending section 32, it is necessary to consider the setting of the bending portion 31 while calculating the length of the soldering pin 3. Then, after determining the diameter of the capacitor and the length of the soldering pin 3, complete the splicing of the capacitor as a whole. The splicing process is: first, complete the installation of the various parts in the capacitor body 1. After the opening is made on the welding pin cover plate 2, the aluminum rivet 5 is passed through the opening from the inside and fixed by the annular buckle 6. Then, the welding pin 3 is welded in the groove of the aluminum rivet 5. Finally, the welding pin cover plate 2 is fixed to the capacitor. The welding pin 3 of the capacitor after production has been bent. The bending direction is determined according to the position of the positive and negative electrodes of the capacitor required by the customer. Different bending directions will result in opposite directions of the positive and negative electrodes of the capacitor.
[0029] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.
Claims
1. A transversely welded capacitor, comprising a capacitor body, characterized in that: The top of the capacitor body is connected to the welding pin cover plate, the welding pin cover plate is provided with a plurality of aluminum rivets, the aluminum rivets and the welding pin cover plate are perpendicular to each other, and the aluminum rivets are connected to the welding pins.
2. A transversely welded capacitor according to claim 1, characterized in that: The capacitor body has a diameter of 22 to 42 mm, and the welding pin has a length of 17 to 27 mm.
3. A transversely welded capacitor according to claim 2, characterized in that: The welding pin is provided with a bending portion, the welding pin portion between the bending portion and the welding pin cover plate is a first bending section, the portion of the welding pin connected to the first bending section is a second bending section, and the bending directions of the welding pins are the same.
4. A transversely welded capacitor according to claim 3, characterized in that: The distance between adjacent welding pins is 10-15 mm.
5. A transversely welded capacitor according to claim 4, characterized in that: The length of the second bending section is greater than half of a difference between a diameter of the capacitor body and a distance between adjacent welding pins.
6. A transversely welded capacitor according to claim 1, characterized in that: The aluminum rivet is provided with a protrusion, and the aluminum rivet is connected to an annular buckle. A fixing groove is formed between the protrusion and the annular buckle, and the welding pin cover plate is located in the fixing groove.
7. A transversely welded capacitor according to claim 1 or 2 or 3 or 4, characterized in that: The welding pin cover plate comprises a low-chloride plate, and the top of the low-chloride plate is connected to EPDM rubber.
8. A transversely welded capacitor according to claim 1 or 2 or 3 or 4, characterized in that: A welding groove is provided on the top of the aluminum rivet, and the welding pin is welded to the welding groove.
9. A transversely welded capacitor according to claim 1 or 2 or 3 or 4, characterized in that: An explosion-proof net is arranged at one end of the capacitor body away from the welding pin.