Shell structure for isolation transformer

Abstract

The utility model discloses a shell structure for an isolation transformer. The shell structure comprises a long cavity seat which is arranged in an inverted mode. The top surface of the rectangular frame body is closed, the lower bottom surface of the rectangular frame body is sunken upwards, and the rectangular frame body is of an integrated structure. The two sides of the rectangular frame body in the length direction are each provided with a plurality of sets of pin bodies which are distributed in pairs and are integrally formed with the rectangular cavity seat in an injection molding mode. The pin body is of a U-shaped structure, the edge of an opening in the bottom side of the long cavity base extends downwards to form a wrapping post used for copper wire winding, and a rib-shaped step surface is arranged on one side, in the length direction, of the long cavity base, so that a transformation coil installed inside and the wrapping post correspondingly connected with an original wiring of the transformation coil are pulled apart by a certain distance conveniently; by means of the inclined line position groove, the transformer coil wiring can be conveniently placed in or an automatic lead can pass through, the creepage distance between the transformer coil and an original wiring pin is effectively increased, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the packaging technology of transformers, and more specifically, to a housing structure for an isolation transformer.

Background Art

[0002] As one of the core functional modules of the power battery management system, the distributed digital communication unit collects, processes, and stores information such as voltage, current, temperature and other parameter indicators during the operation of the battery pack in real time, calculates and controls the working state of the power battery, exchanges information with external devices such as the main control module, and realizes the functions of monitoring and managing the battery pack to ensure the safety, usability, life and other key performances of each single battery pack in the system.

[0003] The isochronous balanced pulse transformer located in the communication unit interface between the high-voltage area and the low-voltage area of the battery management system needs to be able to ensure smooth data transmission while having functions such as high-voltage electrical isolation and common-mode noise suppression.

[0004] The existing pulse transformers have isolation functions, but the isolation effect is poor, and the voltage they can withstand is not very high, about 1000V - 1500V. The distance between the transformer coil and the primary wiring pin is relatively close, which fails to meet the certain creepage distance standard, is prone to creepage, and extremely easily causes problems such as short circuits between wires and between wires and pins or high-voltage failures.

Content of the Utility Model

[0005] To solve the above technical difficulties, the utility model provides a housing structure for an isolation transformer, with a simple overall structure, which effectively separates the transformer coil from the primary wiring pin by a certain distance to avoid creepage and effectively improves the product quality.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A housing structure for an isolation transformer, including an inverted long-shaped cavity seat;

[0008] The long-shaped cavity seat is a top-closed and bottom-face-upwardly sunken, integral long rectangular box, and on both sides of the long rectangular box along the length direction, there are respectively multiple pairs of distributed pin bodies integrally injection-molded with the long-shaped cavity seat;

[0009] The pin body is in a U-shaped structure. The pin body extends downward from the bottom-side open edge of the long-shaped cavity seat to form a winding column for copper wire winding, and the pin body extends outward and downward beside the long-shaped cavity seat and then folds 90° to extend out of the outer edge of the bottom side of the long-shaped cavity seat to form a welding leg for welding connection;

[0010] On one side of the elongated cavity base along the length direction, there is a ribbed stepped surface that increases the creepage distance by separating a certain distance from the winding posts corresponding to the primary winding of the transformer coil for easy internal installation.

[0011] On both sides of the elongated cavity base along the length direction, there are retaining wall rib plates that extend downward respectively to shield and protect the internal cavity and increase local longitudinal shielding.

[0012] Preferably, at the inner edge of the elongated cavity base corresponding to each winding post, there are also inclined wire position grooves that prevent short circuits or high-voltage failures between wires and between wires and pins, and facilitate the placement of the transformer coil wiring or the passage of automatic lead wires.

[0013] Preferably, chamfer structures that increase space and facilitate the operator to wind the wiring around the winding posts are respectively adopted at both ends of the retaining wall rib plates.

[0014] Preferably, a fillet transition structure that reduces the shear stress of the material is adopted between the vertical surfaces in the inner cavity of the elongated cavity base.

[0015] Preferably, on the single side surface of the winding post of each pin body, there is also a recessed arc-shaped notch that facilitates the winding of copper wires.

[0016] The beneficial effects of the present utility model are:

[0017] In the present utility model, the elongated cavity base adopts an inverted long-strip-shaped cavity structure, which is convenient for arranging a ribbed stepped surface for increasing the creepage distance on one side of the bottom end, and separating a certain distance from the winding posts corresponding to the primary winding of the transformer coil for easy internal installation, meeting the requirement standard of the creepage distance, and effectively improving the product quality.

[0018] The retaining wall rib plates that extend downward respectively at the front and rear sides of the elongated cavity base can shield and protect the internal cavity and increase local longitudinal shielding. The chamfer structures at both ends of the retaining wall rib plates can increase the winding space at both ends and facilitate the operator to wind the wiring around the wire columns.

Description of the Drawings

[0019] Figure 1 is the top-down three-dimensional structure schematic diagram of the first embodiment of the present utility model;

[0020] Figure 2 is the bottom-up three-dimensional structure schematic diagram of the first embodiment of the present utility model;

[0021] Figure 3 is the cross-sectional structure schematic diagram cut along the length direction in the first embodiment of the present utility model;

[0022] Figure 4 is the bottom-up frame line structure schematic diagram of the first embodiment of the present utility model;

[0023] Figure 5 It is a top view structural schematic diagram of the first embodiment of the present utility model;

[0024] Figure 6 It is a front view structural schematic diagram of the first embodiment of the present utility model;

[0025] Figure 7 It is a bottom-up three-dimensional structural schematic diagram of the second embodiment of the present utility model;

[0026] Figure 8 It is a longitudinal sectional structural schematic diagram of the second embodiment of the present utility model;

[0027] Figure 9 It is a bottom-up frame line structural schematic diagram of the second embodiment of the present utility model.

Specific Embodiment

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0029] Here, it should be noted that in order to avoid obscuring the present utility model due to unnecessary details, only the structures and / or processing steps closely related to the solution of the present utility model are shown in the drawings, while other details less related to the present utility model are omitted.

[0030] Embodiment 1

[0031] A housing structure for an isolation transformer, as Figures 1 to 6 shown, for the winding connection of pins with the leads of a transformer coil or an inductor coil, including a long-shaped cavity seat 1 arranged in an inverted manner. The long-shaped cavity seat 1 is a long rectangular box body with a closed top surface and a downwardly concave bottom surface, and is an integral structure. On both sides of the long rectangular box body along the length direction, there are respectively provided multiple pairs of distributed and integrally injection-molded pin bodies with the long-shaped cavity seat 1; the pin bodies are in a U-shaped structure, and the pin bodies extend downward from the open edge at the bottom side of the long-shaped cavity seat 1 to form a winding column 2 for copper wire winding. On the single side surface of the winding column 2 of each pin body, an arc-shaped notch 20 convenient for copper wire winding is also recessed; the pin bodies extend outward and downward beside the long-shaped cavity seat 1 and are folded 90° to extend out of the outer edge of the bottom side of the long-shaped cavity seat 1 to form welding feet 3 for welding connection; in this embodiment, the winding column 2 and the welding feet 3 as pins are separately arranged, which can reduce the lead length of the coil and improve the reliability when applied to an isolation device or a filter coil device.

[0032] Continue asFigures 1 to 6 As shown in the figure, on one side of the long cavity base 1 along the length direction, there is a ribbed step surface 4 that increases the creepage distance by separating a certain distance from the winding column 2 corresponding to the primary winding of the transformer coil for convenient internal installation; on both sides of the long cavity base 1 along the length direction, there are retaining wall rib plates 5 that extend downward respectively to shield and protect the internal cavity and increase the local longitudinal shielding. At both ends of the retaining wall rib plates 5, there are chamfer structures 6 that increase the space and facilitate the operator to wind and connect wires to the winding column 2. Between the vertical surfaces in the inner cavity of the long cavity base 1, there is a fillet transition structure 7 that reduces the shear stress of the material.

[0033] In this embodiment, the long cavity base 1 adopts an inverted long strip-shaped cavity structure, which is convenient for setting a ribbed step surface 4 that increases the creepage distance on one side of the bottom end, and separating a certain distance from the winding column 2 corresponding to the primary winding of the transformer coil for convenient internal installation, meeting the requirement standard of the creepage distance, and effectively improving the product quality.

[0034] Embodiment Two

[0035] As Figures 7 to 9 shown in the figure, the difference between this embodiment and Embodiment One is that at the inner edge of the long cavity base 1 corresponding to each winding column 2, there are respectively inclined wire slots 8 that avoid short circuits or high-voltage failures between wires and between wires and pins, and facilitate the placement of the transformer coil wiring or the passage of automatic lead wires.

[0036] That is, in this embodiment, the leads of the coil adopt the setting of wire slots. The inclined wire slots facilitate the oblique lead of the coil, ensuring the consistency of the lead length / position and the electrical performance symmetry of the two arms of the coil; moreover, it can also provide a mechanical hand process space for automatic winding of the lead wires.

[0037] In the above embodiments, with the design of wire slots, before winding the transformer coil, putting the wire into and passing through the inclined wire slots can more effectively avoid problems such as short circuits or high-voltage failures between wires and between wires and pins, and the wire in the slot can prevent the wire from swaying left and right and causing wire breakage; it is more conducive to realizing automatic winding of the coil, improving the product quality and production efficiency. However, without the design of wire slots, it can also meet the high-voltage requirements of the primary and secondary sides of the high-voltage coil and the requirement standard of the creepage distance, but the protection strength between the wires of the coil and between the wires and pins is lower than that of the design with wire slots.

[0038] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0039] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model.

[0040] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0041] Therefore, all equivalent changes made in accordance with the shape, structure, and principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A housing structure for an isolation transformer, characterized in that: It includes a long-shaped cavity seat arranged in an inverted manner; The long-shaped cavity seat is a long rectangular box with a closed top surface and a downwardly concave bottom surface, and is an integral structure. On both sides of the long rectangular box along the length direction, there are multiple pairs of distributed pin bodies that are integrally injection-molded with the long-shaped cavity seat; The pin body has a U-shaped structure. The pin body extends downward from the open edge at the bottom side of the long-shaped cavity seat to form a winding column for winding copper wires. The pin body extends outward and downward beside the long-shaped cavity seat and then folds 90° to extend out of the outer edge of the bottom side of the long-shaped cavity seat to form a welding leg for welding connection; On one side of the long-shaped cavity seat along the length direction, there is a ribbed stepped surface that is convenient for internal installation and increases the creepage distance by separating a certain distance from the winding column corresponding to the primary winding connection of the transformer coil; On both sides of the long-shaped cavity seat along the length direction, there are retaining wall rib plates that extend downward to shield and protect the internal cavity and increase local longitudinal shielding; 2. The housing structure for an isolation transformer according to claim 1, characterized in that, At the inner edge of the long-shaped cavity seat corresponding to each winding column, there are also inclined wire position grooves that avoid short circuits or high-voltage failures between wires and between wires and pins, and are convenient for the transformer coil wiring to be inserted or the automatic lead wire to pass through; 3. The housing structure for an isolation transformer according to claim 2, characterized in that, Both ends of the retaining wall rib plates respectively adopt a chamfer structure that increases space and is convenient for operators to wind and connect wires to the winding columns; 4. A housing structure for an isolation transformer according to claim 1, characterized in that, Between the vertical surfaces in the inner cavity of the long-shaped cavity seat, there is a fillet transition structure that reduces the shear stress of the material; 5. The housing structure for an isolation transformer according to claim 1, characterized in that, On the single side of the winding column of each pin body, there is also a concave arc-shaped notch that is convenient for winding copper wires.

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