High-safety resistor

Abstract

The utility model provides a high-safety resistor which comprises a shell (1), a resistor core (2) is arranged in the shell (1), a mica shell (3) is arranged outside the resistor core (2), quartz sand is filled in the mica shell (3), a leading-out sheet (4) is inserted on the mica shell (3), one end of the leading-out sheet (4) is connected and matched with the resistor core (2), and a group of limiting salient points (5) which are in limiting fit with the mica shell (3) are arranged in the shell (1). And a potting layer (6) covering one end of the mica shell (3) is arranged in the shell (1). The insulating resistor is simple in structure and convenient to produce, the insulating property of the resistor is improved, and the working stability and safety of the resistor are effectively improved in order to improve the structural stability and shock resistance.

Description

Technical Field

[0001] The utility model relates to the electrical field, in particular to a high-safety resistor. Background Art

[0002] In recent years, the energy storage industry has indeed developed rapidly in China. In terms of technological progress, battery energy storage technology has been widely used in the fields of electricity, transportation, industry and consumption due to its advantages of high energy density, long life and rechargeability. Supercapacitor energy storage technology has the advantages of high power density and fast response speed, and is suitable for occasions that require fast charging and discharging.

[0003] The insulation performance can effectively prevent the safety problems caused by leakage or short circuit during the operation of the resistor, thus improving the overall safety of the energy storage system. Therefore, resistors with higher insulation performance have become a common demand in the market.

[0004] In terms of moisture resistance and high insulation performance, the existing power resistors use potting in the inner aluminum shell to fasten the quartz sand and the resistor core into one, and then set a mica insulation layer on the outside, which effectively ensures the moisture resistance of the power resistor. However, most of these resistors can only maintain good insulation in a static environment. For example, in a dynamic environment, if the metal conductor forms the lead end face, under the action of the external force transmitted along its axial direction, the metal conductor will damage the mica insulation layer and the potting layer, causing moisture in the air to invade the inside of the resistor, resulting in a decrease in insulation performance, thereby causing a short circuit. Then the safety of the overall energy storage system is destroyed. Utility Model Content

[0005] The utility model aims to overcome the deficiencies in the prior art and provide a high-safety resistor.

[0006] This application provides the following technical solutions:

[0007] A high-safety resistor comprises a shell, a resistor core is arranged in the shell, a mica shell is arranged outside the resistor core, and quartz sand is filled in the mica shell. The invention is characterized in that: a pair of porcelain sleeves are passed through one end of the mica shell, a conductive lead-out piece is passed through each porcelain sleeve, one end of the lead-out piece passes through the mica shell to be connected with the resistor core, a group of limiting convex points which form limiting cooperation with the mica shell are arranged in the shell, a potting layer covering one end of the mica shell is arranged in the shell, and the potting layer completely wraps the porcelain sleeve and the limiting convex points.

[0008] On the basis of the above technical solutions, there are also the following further technical solutions:

[0009] The potting layer includes sealing dry powder and diluent, the sealing dry powder is composed of a mixture of sand materials with different mesh sizes, the diluent is a mixture of two different liquids, and the mass ratio of the sealing dry powder to the diluent is 100:35-45; the mass fraction of 80-mesh quartz sand in the sealing dry powder is 35%-45%, the mass fraction of 200-mesh quartz sand is 25%-30%, and the mass fraction of 2000-mesh silicon micropowder is 30%-35%; the diluent is a mixture of silicone resin glue and ethanol in a mass ratio of 1:2-2.2.

[0010] The shell is made of aluminum, and a group of grooves are arranged on the upper surface and the lower surface thereof, and the grooves are distributed along the length direction of the shell.

[0011] The center lines of the group of limiting protrusions are in the same longitudinal plane.

[0012] The group of limiting convex points are distributed on at least two inner walls of the opening end of the shell, and the two inner walls are symmetrically distributed, and at least one limiting convex point is distributed on each inner wall.

[0013] The potting layer does not protrude from the housing.

[0014] Utility model advantages:

[0015] The utility model has a simple structure and is easy to produce, and improves the resistance of the resistor to the impact force coming from the axial direction of the lead sheet, and avoids the situation where moisture enters the resistor core due to damage to the mica shell. The insulation performance of the resistor is improved, the structural stability and shock resistance are increased, and the working stability and safety of the resistor are effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view of the utility model;

[0017] Figure 2 yes Figure 1 BB cross-sectional view. DETAILED DESCRIPTION

[0018] like Figure 1 and 2 As shown, a high-safety resistor comprises an aluminum shell 1, and a group of slots 1a for heat dissipation are provided on the upper and lower surfaces of the outer wall of the shell 1, and the slots 1a are distributed along the length direction of the shell 1. The shell 1 can be a shell 1 with one end open and the other end sealed, or a tubular shell with both ends open.

[0019] A resistor core 2 is arranged in the housing 1, and an insulating mica shell 3 composed of a mica board is arranged outside the resistor core 2. The space between the mica shell 3 and the resistor core 2 is filled with quartz sand 8. A pair of porcelain sleeves 7 are inserted through one end of the mica shell 3 on the same side as the opening end of the housing, and a conductive lead-out sheet 4 is inserted in each porcelain sleeve 7, and one end of the lead-out sheet 4 passes through the mica shell 3 to form an electrical connection with the resistor core 2.

[0020] A group of limiting convex points 5 are protruded on the inner walls of the four sides of the opening end of the shell 1 outside the mica shell 3, and the center lines of the group of limiting convex points 5 are in the same longitudinal plane, and at least one limiting convex point 5 is distributed in each plane. The mica shell 3 is limited by the convex points 5, so that the mica shell will not shake along the axial direction in the shell, thereby enhancing the stability of the inside in the axial direction.

[0021] At least one annular inner wall groove 1b is provided on the inner wall of the shell 1 on one side of the porcelain sleeve 7. In this embodiment, a pair of annular inner wall grooves 1b are used. A potting layer 6 covering one end of the mica shell 3 is provided in the shell 1. The potting layer 6 completely wraps the porcelain sleeve 7, the limiting protrusion 5 and the grid segment 1b, and does not protrude from the shell 1. Thus, the end is tightened, and the impact resistance along the axial direction of the lead-out sheet 4 is effectively improved. The inner wall groove 1b makes the potting layer 6 more firmly connected to the shell, ensuring the impact resistance of the potting layer 6.

[0022] The potting layer 6 is composed of a mixture of sealing material dry powder and diluent, the mass ratio of which is 100:35-45; the mass fraction of 80 mesh quartz sand in the sealing material dry powder is 35%-45%, the mass fraction of 200 mesh quartz sand is 25%-30% and the mass fraction of 2000 mesh silicon powder is 30%-35%; the diluent is a mixture of silicone resin glue and ethanol in a mass ratio of 1:2-2.2. The mixed sealing material dry powder and diluent are potted and then left to solidify to form a solidified potting layer 6.

Claims

1. A high-safety resistor, comprising a housing (1), a resistor core (2) arranged inside the housing (1), a mica shell (3) arranged outside the resistor core (2), and the mica shell (3) filled with quartz sand, characterized in that: A pair of porcelain sleeves (7) are provided on one end of the mica shell (3), a conductive lead sheet (4) is provided in each porcelain sleeve (7), one end of the lead sheet (4) passes through the mica shell (3) and is connected to the resistor core (2), a group of limiting convex points (5) are provided in the shell (1) and form a limiting match with the mica shell (3), and a potting layer (6) covering one end of the mica shell (3) is provided in the shell (1), and the potting layer (6) completely wraps the porcelain sleeve (7) and the limiting convex points (5).

2. A high safety resistor according to claim 1, characterized in that: The shell (1) is made of aluminum, and a group of grooves (1a) are provided on the upper surface and the lower surface thereof, and the grooves (1a) are distributed along the length direction of the shell (1).

3. A high safety resistor according to claim 1, characterized in that: The center lines of the group of limiting protrusions (5) are in the same longitudinal plane.

4. A high safety resistor according to claim 1, characterized in that: The group of limiting protrusions (5) are distributed on at least two inner walls of the open end of the shell (1), and the two inner walls are symmetrically distributed, with at least one limiting protrusion (5) distributed on each inner wall.

5. A high safety resistor according to claim 1, characterized in that: The potting layer (6) does not protrude from the housing (1).

Images