Ceramic shell wire-wound resistor with parallel lead-out pins

Abstract

The utility model relates to a ceramic shell wire-wound resistor with parallel lead-out pins, the resistor comprises a ceramic shell and a resistor core body, the resistor core body is arranged in the ceramic shell, the resistor core body comprises a ceramic rod, a coating, two combined pins and a resistance wire, the resistance wire is arranged on the ceramic rod, and the coating is arranged on the ceramic rod. The coating covers the resistance wire, the combined pins are mounted on the ceramic rod, and the mounting directions of the two combined pins are opposite, so that the lead-out pins are parallel to the long edge of the ceramic shell and are positioned in the middle of the ceramic shell. Compared with the prior art, the plug-in piece is controlled to be parallel to the long edge of the ceramic shell by setting the position of the flanging of the ferrule, and meanwhile, the resistor core body can be ensured to be centered in the ceramic shell, so that the pins can be conveniently kept centered and parallel in position after being led out; the coating covers the surface of the resistance wire, so that the fixing strength of the resistance wire is enhanced, and the energy load of the resistor can be effectively increased.

Description

Technical Field

[0001] The utility model relates to the technical field of resistors, in particular to a ceramic shell wire-wound resistor with parallel lead-out pins. Background Art

[0002] The lead-out pins of common automotive charging and discharging resistors extend perpendicular to the long side of the ceramic shell. This is because the capped pins used in conventional wirewound resistors cannot be changed in their orientation. This approach makes it difficult to adapt to the wiring layouts of control boxes in different vehicle models.

[0003] The utility model patent with publication number CN212276937U discloses a ceramic shell resistor, including a ceramic shell, a wound resistor body and a filler. The wound resistor body includes a ferrule, a ceramic shaft, a resistance wire and a lead pin. The ceramic shell is a box structure with an open upper end. The ceramic shaft is installed in the box structure, and the two ends of the ceramic shaft are against the side walls of the ceramic shell. The resistance wire is wound around the outer ring of the ceramic shaft. The ferrule is nested in the outer rings of the two ends of the ceramic shaft and connected to the resistance wire. The lead pin is connected to the ferrule, and the lead pin extends vertically upward from the opening of the ceramic shell. This patent prevents loosening and skewing by abutting the two ends of the ceramic shaft against the side walls of the two ends of the ceramic shell, but does not change the direction of the lead pin.

[0004] Therefore, providing a ceramic wirewound resistor with pins extending parallel to the long sides of the ceramic shell is a technical problem that needs to be solved at present. Utility Model Content

[0005] The purpose of the present utility model is to provide a ceramic housing wirewound resistor with parallel lead-out pins in order to overcome the defects of the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the utility model, a ceramic shell wound resistor with parallel lead pins is provided, the resistor comprising a ceramic shell and a resistor core, the resistor core being installed in the ceramic shell, the resistor core comprising a ceramic rod, a coating, two combination pins and a resistance wire, the resistance wire being installed on the ceramic rod, the coating covering the resistance wire, the combination pins being installed on the ceramic rod, the two combination pins being installed in opposite directions so that the lead pins are parallel to the long sides of the ceramic shell and centered in the ceramic shell.

[0008] As a preferred technical solution, the resistor further includes a filler, which fills the space formed by the ceramic shell and the resistor core.

[0009] As a preferred technical solution, the combined pins are respectively installed at both ends of the ceramic rod.

[0010] As a preferred technical solution, the combined pin includes an insert, a ferrule and a ferrule fold, the insert is connected to the ferrule fold, the ferrule is connected to the ferrule fold, and the ferrule is connected to the ceramic rod.

[0011] As a preferred technical solution, the cross-section of the ferrule fold is L-shaped, and the ferrule fold includes two straight edges.

[0012] As a preferred technical solution, the two straight sides of the folded edge of the ferrule are respectively parallel or perpendicular to the long side of the ceramic shell.

[0013] As a preferred technical solution, the insert and the ferrule are respectively welded to straight sides parallel to the long sides of the ceramic shell.

[0014] As a preferred technical solution, the straight edge perpendicular to the long side of the ceramic shell is close to the inner wall of the long side of the ceramic shell.

[0015] As a preferred technical solution, the different straight sides perpendicular to the long sides of the ceramic housing are in opposite directions.

[0016] As a preferred technical solution, the different straight sides parallel to the long sides of the ceramic shell are coaxial.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The utility model controls the insertion piece to be parallel to the long side of the ceramic shell by setting the position of the folded edge of the ring. At the same time, it can ensure that the position of the resistor core in the ceramic shell is centered, making it convenient to keep the position of the pins centered and parallel after they are led out.

[0019] 2. The utility model covers the surface of the resistance wire with coating, which enhances the fixing strength of the resistance wire and can effectively increase the energy load of the resistor.

[0020] 3. The utility model adopts the form of separate welding of the insert, the ferrule folding edge and the ferrule, which facilitates the subsequent development of inserts of different sizes and reduces the development cost and time of other common parts.

[0021] 4. The utility model adopts a wire-wound resistor core structure, which is the same as the winding structure of conventional products, which can reduce the development of new winding equipment and winding tooling, and reduce development costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the appearance of the utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the resistor core structure of the present utility model;

[0025] Figure 4 It is a schematic diagram of the explosion structure of the utility model.

[0026] 1. Ceramic shell; 2. Filler; 3. Resistor core; 31. Ceramic rod; 32. Coating; 33. Combination pins; 34. Resistor wire; 331. Insert; 332. Ferrule; 333. Ferrule fold. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0028] New energy vehicles (NEVs) use unconventional fuels as their power source (or use conventional fuels with new onboard power units) and integrate advanced technologies in vehicle power control and drive to create vehicles with advanced technical principles, new technologies, and new structures. New energy vehicles include pure electric vehicles, extended-range electric vehicles, fuel cell electric vehicles, and plug-in hybrid electric vehicles.

[0029] Ceramic-cased wire-wound resistors used in new energy vehicles are used in multiple modules, including the battery pack pre-charging circuit, and are used in the BDU, PDU, and BMS pre-charging circuits. Their function is to protect other electrical components in the circuit from the impact of large current shocks through the voltage-dividing and current-limiting effect generated by the resistors connected in series in the circuit, such as starting protection for high-voltage relays and energy release of high-voltage capacitors. The lead-out pins of commonly used automotive charging and discharging resistors are in the form of pins extending perpendicular to the long side of the ceramic shell. The reason is that the structure of the capped pins used in traditional wire-wound resistors cannot change their lead-out direction. However, this lead-out method is difficult to meet the wiring installation layout structure in the control boxes of different models. Therefore, how to design a ceramic wire-wound resistor with lead-out pins parallel to the long side of the ceramic shell is a technical problem that needs to be solved.

[0030] The present invention provides a ceramic shell wire-wound resistor with parallel lead-out pins. The present invention controls the parallelism of the insert and the long side of the ceramic shell by setting the position of the folded edge of the ferrule, and at the same time ensures that the position of the resistor core is centered in the ceramic shell, making it convenient to keep the position of the pins centered and parallel after they are led out. The present invention covers the surface of the resistor wire with a coating, which enhances the fixing strength of the resistor wire and can effectively increase the energy load of the resistor. The present invention facilitates the subsequent development of inserts of different sizes by using the form of separate welding of the insert, the folded edge of the ferrule and the ferrule, thereby reducing the development cost and time of other shared parts. The present invention adopts a wire-wound resistor core structure, which is the same as the winding structure of conventional products, and can reduce the development of new winding equipment and winding tooling, thereby reducing development costs.

[0031] Example 1

[0032] like Figures 1-4 As shown, a ceramic shell wound resistor with parallel lead pins, the resistor includes a ceramic shell 1 and a resistor core 3, the resistor core 3 is installed in the ceramic shell 1, the resistor core 3 includes a ceramic rod 31, a coating 32, two combination pins 33 and a resistance wire 34, the resistance wire 34 is installed on the ceramic rod 31, the coating 32 covers the resistance wire 34, the two combination pins 33 are installed on the ceramic rod 31, and the combination pins (33) are installed in opposite directions so that the lead pins are parallel to the long side of the ceramic shell 1 and are centered in the ceramic shell 1.

[0033] The resistor further includes a filler 2 , which fills the space formed by the ceramic shell 1 and the resistor core 3 .

[0034] The combined pins 33 are respectively installed at both ends of the ceramic rod 31 .

[0035] In this embodiment, ceramic housing 1 is a cubic structure with a hollow interior and no top cover. Resistor core 3 is placed within ceramic housing 1, clinging to the bottom of the housing. The remaining space within ceramic housing 1 is filled with filler 2. Filler 2 is cured by heating to secure resistor core 3 within ceramic housing 1.

[0036] The resistance wire 34 is spirally wound on the surface of the ceramic rod 31, and then the surface of the resistance wire 34 and the ceramic rod 31 are fully covered with a protective coating 32 to form a surface coating layer. This coating layer serves to fix the resistance wire 34 and electrically insulate. The coating 32 is fixed to the surface of the resistance wire by heating and curing. The resistor includes two combination pins 33, which are respectively installed at both ends of the ceramic rod 31. The ring 332 is sleeved on both ends of the ceramic rod 31 and fixed to the ceramic rod by clamping. The two ends of the resistance wire 34 are respectively connected to the combination pins 33 by welding, or can be directly welded to the plug 331.

[0037] The combined pin 33 includes an insert 331 , a ferrule 332 and a ferrule fold 333 . The insert 331 is connected to the ferrule fold 333 . The ferrule 332 is connected to the ferrule fold 333 . The ferrule 332 is connected to the ceramic rod 31 .

[0038] The cross section of the ferrule fold 333 is L-shaped, and the ferrule fold 333 includes two straight sides.

[0039] The two straight sides of the ferrule folded edge 333 are respectively parallel or perpendicular to the long side of the ceramic housing 1 .

[0040] The insert 331 and the ferrule 332 are respectively welded to the straight sides parallel to the long sides of the ceramic housing 1 , so that the lead pins are parallel to the long sides of the ceramic housing 1 .

[0041] The straight edge perpendicular to the long side of the ceramic shell 1 is close to the inner wall of the long side of the ceramic shell 1 .

[0042] The different straight sides perpendicular to the long sides of the ceramic housing 1 are in opposite directions.

[0043] The different straight sides parallel to the long sides of the ceramic housing 1 are coaxial.

[0044] In this embodiment, two combination pins 33 are respectively installed at both ends of the ceramic rod 31. Since the different straight sides parallel to the long side of the ceramic shell 1 are coaxial, the different straight sides perpendicular to the long side of the ceramic shell 1 are in opposite directions, and the straight sides perpendicular to the long side of the ceramic shell 1 are close to the inner wall of the long side of the ceramic shell 1, the different combination pins 33 are located on the same horizontal plane, and the different straight sides perpendicular to the long side of the ceramic shell 1 on the different combination pins 33 are in opposite directions and respectively abut the inner wall of the ceramic shell 1, so that the lead pins are centered and parallel.

[0045] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A ceramic housing wire wound resistor with parallel lead pins, the resistor comprising a ceramic housing (1) and a resistor core (3), the resistor core (3) being mounted in the ceramic housing (1), characterized in that: The resistor core (3) comprises a ceramic rod (31), a coating (32), two combination pins (33) and a resistance wire (34); the resistance wire (34) is mounted on the ceramic rod (31); the coating (32) covers the resistance wire (34); the combination pins (33) are mounted on the ceramic rod (31); the two combination pins (33) are mounted in opposite directions so that the lead pins are parallel to the long sides of the ceramic housing (1) and are centrally located in the ceramic housing (1).

2. A ceramic housing wirewound resistor with parallel lead pins according to claim 1, characterized in that: The resistor further comprises a filler (2), wherein the filler (2) fills the space formed by the ceramic shell (1) and the resistor core (3).

3. The ceramic housing wirewound resistor with parallel lead pins according to claim 1, characterized in that: The combined pins (33) are respectively mounted on both ends of the ceramic rod (31).

4. The ceramic housing wirewound resistor with parallel lead pins according to claim 1, characterized in that: The combined pin (33) comprises an insert (331), a ferrule (332) and a ferrule fold (333); the insert (331) and the ferrule fold (333) are connected; the ferrule (332) and the ferrule fold (333) are connected; and the ferrule (332) is connected to the ceramic rod (31).

5. The ceramic housing wirewound resistor with parallel lead pins according to claim 4, characterized in that: The cross section of the ferrule fold (333) is L-shaped, and the ferrule fold (333) includes two straight edges.

6. The ceramic housing wirewound resistor with parallel lead-out pins according to claim 5, characterized in that: The two straight sides of the ferrule folded edge (333) are respectively parallel or perpendicular to the long side of the ceramic housing (1).

7. The ceramic housing wirewound resistor with parallel lead-out pins according to claim 6, characterized in that: The insert (331) and the ferrule (332) are respectively welded to straight sides parallel to the long sides of the ceramic housing (1).

8. The ceramic housing wirewound resistor with parallel lead pins according to claim 6, characterized in that: The straight edge perpendicular to the long side of the ceramic shell (1) is close to the inner wall of the long side of the ceramic shell (1).

9. The ceramic housing wirewound resistor with parallel lead pins according to claim 6, characterized in that: The different straight sides perpendicular to the long sides of the ceramic housing (1) are in opposite directions.

10. The ceramic housing wirewound resistor with parallel lead-out pins according to claim 6, characterized in that: The different straight sides parallel to the long sides of the ceramic housing (1) are coaxial.

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