Pre-charging resistor for vehicle

Abstract

The utility model relates to a vehicle pre-charging resistor, including resistor core body, shell, insulating sheet and fixed filler, resistor core body includes ceramic body, resistance wire, pin and support, resistor core body is placed in the shell, the shell is equipped with support body, insulating sheet is installed between resistor core body and shell, there are two pin, and the fixed filler is fixed filler. One end is respectively connected with two ends of the ceramic body, and the other end extends out of the shell; one ends of the two brackets are respectively connected with two ends of the ceramic body, and the other ends are connected with the supporting body; and the gap in the shell is filled with the fixed filler. Compared with the prior art, according to the utility model, through the split type pins, the lead-out pins not only can meet the size and position requirements, but also can meet the requirements of different installation directions and welding sizes, thereby facilitating the welding of a PCB (Printed Circuit Board) or a Busbar; the lead-out pin and the fixed pin are connected through welding, so that the reliability of electrical connection is met; the insulation clamp can ensure the insulation distance so as to meet the requirement of high voltage resistance.

Description

Technical Field

[0001] The utility model relates to a resistor, in particular to a vehicle pre-charging resistor. Background Art

[0002] The automotive pre-charging resistor is an electrical component used in the battery pack pre-charging circuit of new energy vehicles. The resistor is connected in series in the battery pack pre-charging circuit to provide power-on startup protection for other electrical components of the battery management system, such as high-voltage relays.

[0003] The existing common connection method of the vehicle pre-charging resistor usually adopts a wire lead-out structure, and the electrical connection is made through the wire or the terminal on the wire. This method is not compact enough and cannot meet the installation space requirements of the control box in a very small space.

[0004] Therefore, how to design a vehicle pre-charging resistor that can be installed in a small space control box is a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of the utility model is to provide a vehicle pre-charging resistor in order to overcome the defect of the prior art that the installation space requirement of a very small space control box cannot be met.

[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 vehicle pre-charging resistor is provided, comprising a resistor core, a shell, an insulating sheet and a fixed filler, wherein the resistor core comprises a ceramic body and a resistance wire wound on the ceramic body, the resistor core is placed in the shell, a support body is provided in the shell, the insulating sheet is installed between the resistor core and the shell, the resistor core also comprises a pin and a bracket, the number of the pins is two, the two ends of the ceramic body are respectively connected to one end of the two pins, and the other ends of the two pins extend to the outside of the shell; the number of the brackets is two, the two ends of the ceramic body are respectively connected to one end of the two brackets, and the other ends of the two brackets are respectively connected to the support body; the fixed filler fills the gap in the shell.

[0008] As a preferred technical solution, the plug pin includes a lead pin and a fixed pin connected to each other at one end, the other end of the lead pin extends out of the shell parallel to the bottom surface of the shell, and the other end of the fixed pin is connected to the ceramic body.

[0009] As a preferred technical solution, a pin installation hole is provided on the ceramic body, and a pin spring sheet is provided on one end of the fixing foot connected to the ceramic body.

[0010] As a preferred technical solution, the plug pins are lead-out pins and fixed pins fixed by welding.

[0011] As a preferred technical solution, the resistor further comprises an insulating clip, which is mounted on an edge of the housing on a side where the lead pins extend out.

[0012] As a preferred technical solution, a welding nose is provided on the plug pin, and the resistance wire is welded on the welding nose.

[0013] As a preferred technical solution, a bracket mounting hole is provided on the ceramic body, and a protrusion is provided on the bracket, and the protrusion and the bracket mounting hole match each other.

[0014] As a preferred technical solution, the support body is located on one side of the shell, and is provided with a protrusion, and the bracket is provided with a matching hole, and the protrusion and the matching hole match each other.

[0015] As a preferred technical solution, the bracket is made of insulating material.

[0016] As a preferred technical solution, the housing is made by aluminum die-casting.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1) The utility model designs a split-type plug pin, so that the lead pins at the customer's installation end can meet higher dimensional position accuracy, which is convenient for welding PCB or Busbar;

[0019] 2) The lead-out pins and the fixed pins connected by welding in the utility model meet the reliability of electrical connection under the condition of ensuring dimensional accuracy;

[0020] 3) The utility model insulation clamp can ensure the insulation distance between the exposed lead pin and the shell to meet and improve the ability to withstand high voltage insulation;

[0021] 4) The lead pins of the split-type plug of the utility model can be designed in different directions or different sizes to meet the electrical connection requirements in different installation directions or different welding sizes. 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 explosion structure of the utility model;

[0025] Figure 4 This is a schematic diagram of the pin structure of the utility model;

[0026] Figure 5This is a schematic diagram of the structure of a ceramic body wound with a resistance wire according to the utility model;

[0027] The numbers in the figure show:

[0028] 1. Resistor core, 10. Ceramic body, 100. Pin mounting hole, 101. Bracket mounting hole, 11. Resistance wire, 12. Pin, 120. Lead pin, 121. Fixed pin, 1210. Pin spring sheet, 122. Welding nose, 13. Bracket, 130. Bump, 131. Matching hole, 2. Shell, 20. Support body, 200. Protrusion, 3. Insulating sheet, 4. Fixed filler, 5. Insulating clip. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0030] like Figure 1 As shown, the present invention provides a vehicle pre-charging resistor, comprising a resistor core 1, a shell 2, an insulating sheet 3, a fixed filler 4 and an insulating clip 5.

[0031] like Figure 2 and Figure 3 As shown, the resistor core 1 includes a ceramic body 10, a resistance wire 11, two pins 12, and two brackets 13. The resistance wire 11 is evenly wound on the surface of the ceramic body 10, and the surface of the resistance wire 11 and the ceramic body 10 are covered with a protective coating, and the two ends of the resistance wire 11 are connected to the two pins 12 respectively.

[0032] like Figure 5 As shown, the ceramic body 10 is provided with a pin mounting hole 100 and a bracket mounting hole 101, and two brackets 13 are made of insulating material, installed on both sides of the resistor core 1, and fixed in the housing 2. Specifically, a protrusion 130 is provided thereon, and the protrusion 130 and the bracket mounting hole 101 are matched, and the two brackets 13 are also provided with matching holes 131.

[0033] like Figure 4As shown, the pin 12 includes a lead pin 120 and a fixed pin 121, one end of the lead pin 120 and the fixed pin 121 are fixed by welding; the other end of the fixed pin 121 is provided with a pin spring piece 1210, which is inserted into the pin mounting hole 100 of the ceramic body 10 and fixed in the mounting hole by the pin spring piece 1210; the other end of the lead pin 120 extends out of the housing 2 parallel to the bottom surface of the housing 2 and is directly welded to the PCB or busbar. The fixed pin 121 is also provided with a welding nose 122, and the resistance wire 11 is connected to the welding nose 122 by welding.

[0034] like Figure 3 As shown, the housing 2 is a cube with a hollow interior and no cover on the top surface, and is made of aluminum through an aluminum die-casting process. The resistor core 1 is installed in the housing 2, and an insulating sheet 3 is placed between the resistor core 1 and the housing 2. The insulating sheet 3 is tightly attached to the bottom surface of the aluminum shell and fixed by a fixed filler 4. A support body 20 is provided at the four corners of the bottom surface of the housing 2, and a protrusion 200 is provided on the support body 20, and the protrusion 200 and the matching hole 131 are matched. The remaining space in the housing 2 is filled with a fixed filler 4.

[0035] The insulating clamp 5 is clamped on the edge of the housing 2 , from which a lead pin 120 extends. The inner side of the insulating clamp 5 is fixed inside the aluminum shell by a fixing filler 4 .

[0036] The fixed filler 4 is a material that can be cured by heating.

[0037] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A vehicle pre-charging resistor, comprising a resistor core (1), a housing (2), an insulating sheet (3) and a fixed filler (4), wherein the resistor core (1) comprises a ceramic body (10) and a resistance wire (11) wound around the ceramic body (10), characterized in that: The resistor core (1) is placed in a shell (2), a support body (20) is provided in the shell (2), the insulating sheet (3) is installed between the resistor core (1) and the shell (2), the resistor core (1) also includes a pin (12) and a bracket (13), the pins (12) are two, the two ends of the ceramic body (10) are respectively connected to one end of the two pins (12), and the other ends of the two pins (12) extend to the outside of the shell (2); the brackets (13) are two, the two ends of the ceramic body (10) are respectively connected to one end of the two brackets (13), and the other ends of the two brackets (13) are respectively connected to the support body (20); the fixed filler (4) fills the gap in the shell (2).

2. A vehicle pre-charging resistor according to claim 1, characterized in that: The plug pin (12) comprises a lead pin (120) and a fixed pin (121) which are connected to each other at one end, the other end of the lead pin (120) extends out of the shell (2) parallel to the bottom surface of the shell (2), and the other end of the fixed pin (121) is connected to the ceramic body (10).

3. A vehicle pre-charging resistor according to claim 2, characterized in that: The ceramic body (10) is provided with a pin installation hole (100), and the end of the fixing foot (121) connected to the ceramic body (10) is provided with a pin spring sheet (1210).

4. A vehicle pre-charging resistor according to claim 2, characterized in that: The plug pin (12) comprises a lead-out pin (120) and a fixed pin (121) fixed by welding.

5. A vehicle pre-charging resistor according to claim 1, characterized in that: The resistor also includes an insulating clip (5), which is mounted on an edge of the housing (2) on a side where the lead pin (120) extends out.

6. A vehicle pre-charging resistor according to claim 1, characterized in that: The plug pin (12) is provided with a welding nose (122), and the resistance wire (11) is welded to the welding nose (122).

7. A vehicle pre-charging resistor according to claim 1, characterized in that: The ceramic body (10) is provided with a bracket mounting hole (101), and the bracket (13) is provided with a protrusion (130), and the protrusion (130) and the bracket mounting hole (101) are matched.

8. A vehicle pre-charging resistor according to claim 1, characterized in that: The support body (20) is located on one side of the shell (2) and is provided with a protrusion (200). The bracket (13) is provided with a matching hole (131), and the protrusion (200) and the matching hole (131) match each other.

9. A vehicle pre-charging resistor according to claim 1, characterized in that: The bracket (13) is a bracket (13) made of insulating material.

10. A vehicle pre-charging resistor according to claim 1, characterized in that: The housing (2) is a housing (2) made by aluminum die-casting.

Images