CN219677032U

CN219677032U - Transformer and application system thereof

Info

Publication number: CN219677032U
Application number: CN202321280800.4U
Authority: CN
Inventors: 徐富; 谢晋; 苏世红; 李园龙; 陶利珍; 杨国华
Original assignee: Sichuan Zhongguang Lightning Protection Technologies Co ltd
Current assignee: Sichuan Zhongguang Lightning Protection Technologies Co ltd
Priority date: 2023-05-24
Filing date: 2023-05-24
Publication date: 2023-09-12
Anticipated expiration: 2033-05-24

Abstract

The utility model belongs to the technical field of electronic elements, and discloses a transformer, which comprises an insulating shell, wherein the insulating shell is provided with a magnetic core cavity which is used for installing a coil and is provided with a transverse opening; the insulation shell comprises a bottom wall and side walls connected to two sides of the bottom wall respectively, and the outer sides of the two side walls are respectively provided with a lead groove extending from one end of the opening to the opposite end of the opening; the insulation shell is provided with at least two first-stage pins and at least two second-stage pins, the first-stage pins are positioned at one end of the opening of the magnetic core cavity, and the second-stage pins are positioned at one end of the opening of the magnetic core cavity; the first stage pin and the second stage are arranged near the bottom wall. The utility model can greatly improve the electric gap and the creepage distance on the basis of meeting the requirement of reinforcing insulation so as to meet the electric insulation requirement of high isolation withstand voltage. The utility model also discloses an application system based on the high-isolation high-frequency transformer.

Description

Transformer and application system thereof

Technical Field

The utility model belongs to the technical field of electronic elements, and particularly relates to a transformer and an application system thereof.

Background

Along with the development of high-frequency and miniaturization of the high-frequency transformer, the requirements on the isolation withstand voltage of the primary and secondary of the isolation transformer are higher and higher, for example, a BMS system, the isolation voltage of the high-voltage part isolation transformer is up to 4000Vac, and in order to meet the requirements, the requirement of enhancing insulation between the primary and secondary is met, and the creepage distance between the primary and secondary is not less than 8mm.

However, the conventional compact high-frequency isolation transformer at present has the primary and secondary creepage distances of only 2-4 mm, and the isolation voltage is about 1500Vac, and cannot be directly applied to the high-voltage control part of the BMS system. If the creepage distance is not smaller than 8mm, the occupied plate size of the transformer is increased greatly, which is contrary to the miniaturization of components.

Disclosure of Invention

In order to solve the technical problems, the utility model discloses a transformer, which can greatly improve the electric gap and the creepage distance on the basis of meeting the requirement of reinforcing insulation so as to meet the electric insulation requirement of high isolation withstand voltage.

The utility model also discloses an application system based on the high-isolation high-frequency transformer.

The specific technical scheme of the utility model is as follows:

a transformer, comprising:

an insulating housing having a magnetic core cavity for mounting a coil and having a transverse opening;

the insulation shell comprises a bottom wall and side walls connected to two sides of the bottom wall respectively, and the outer sides of the two side walls are respectively provided with a lead groove extending from one end of the opening to the opposite end of the opening;

the insulation shell is provided with at least two first-stage pins and at least two second-stage pins, the first-stage pins are positioned at one end of the opening of the magnetic core cavity, and the second-stage pins are positioned at one end of the opening of the magnetic core cavity;

the first stage pin and the second stage are arranged near the bottom wall.

Through setting up the lead wire groove in the lateral wall, on realizing miniaturized design's basis, for the bottom opening, set up first order pin and second level pin in the diapire, pass through the lateral wall lead wire groove with the lead-out wire from the opening part transition of magnetic core chamber to the dorsal part of magnetic core chamber to fine increase the creepage distance and the electric gap of first order pin and second level pin, thereby improve the insulating properties of first order pin and second level pin, avoid the potential safety hazard, thereby better satisfy the design demand of high withstand voltage isolation; and the split flow of the coil outgoing lines is realized, so that the coils are conveniently and reasonably managed.

Preferably, at least one side wall has at least two lead slots.

The coil is suitable for a specific structure, and the side wall is provided with the lead groove, so that the lead wire of the coil passes through the lead groove to be transited, and a better electric insulation effect is obtained.

Preferably, any two lead grooves are arranged in parallel

The lead grooves of the same side wall are parallel to each other, so that reasonable structure layout is realized, and the arrangement requirement of the outgoing lines is better met.

Preferably, the side walls on two sides of the bottom wall are provided with wire guide grooves.

When the two side walls are provided with the wiring grooves, the requirement of reasonable layout can be better realized.

Preferably, the surface faces of all the first stage pins and the surface faces of all the second stage pins are located on the same plane.

When the surface faces of the first-stage pins and the second-stage pins are located on the same plane, the transformer can be conveniently installed, and the assembly efficiency is improved.

Preferably, one end of any one of the lead grooves, which is close to the opening of the magnetic core cavity, is provided with an avoidance part.

The avoidance part can provide a position for the outgoing line to enter the corresponding lead wire groove so that the outgoing line can enter the corresponding lead wire groove more quickly.

Preferably, the first stage pins and the second stage pins are gull-shaped pins.

The gull-shaped pins are convenient for outgoing line winding pins and reliable welding in the subsequent process, are also convenient for realizing surface mount installation of products, and greatly improve the production efficiency and the product quality.

Preferably, the gull-shaped pin includes:

a first section and a second section connected in series;

wherein, in the installed state, the position of the first section is higher than the position of the second section;

the first section is used for wire winding foot and/or cable welding, and the second section is used for product surface mounting.

The first section and the second section are in continuous connection, and due to the fact that the first section and the second section are in height difference, a wiring space is reserved at the first section, and therefore wire winding and/or wire welding are facilitated.

A high voltage control module comprising a transformer as described above.

The battery management system comprises the high-voltage control module.

Compared with the prior art, the utility model can increase the electric gap and creepage distance between the first-stage pin and the second-stage pin of the high-frequency isolation transformer so as to meet the application requirement of high isolation withstand voltage; on the basis of the structure, the utility model not only strengthens insulation, but also reduces the size of the occupied plate, thereby better achieving the purpose of miniaturization; in addition, based on the structure of the utility model, the utility model also has better air fluidity and relatively better heat dissipation effect.

Drawings

FIG. 1 is a schematic view of an insulating housing according to an embodiment of the present utility model;

FIG. 2 is a schematic view of one of the directions of the embodiment of the present utility model;

FIG. 3 is a schematic view of another aspect of an embodiment of the present utility model;

fig. 4 is an enlarged view at a of fig. 3.

In the figure: 1-an insulating housing; 101-a bottom wall; 102-sidewalls; 103-top wall; 104-a back wall; a 2-coil; 3-magnetic core cavity; 4-a wire slot; 5-first stage pins; 501-a first section; 502-a second section; 503-middle section; 6-second stage pins; 7-avoiding part.

Detailed Description

In order to make the technical scheme of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the following specific embodiments.

As shown in fig. 1 to 3, a transformer comprises an insulating housing 1, the insulating housing 1 having a core cavity 3 for mounting a coil 2 and having a lateral opening; the insulating housing 1 comprises a bottom wall 101 and side walls 102 respectively connected to two sides of the bottom wall 101, wherein the outer sides of the two side walls 102 are respectively provided with a lead groove 4 extending from one end of an opening to the opposite end of the opening; the insulation shell 1 is provided with at least two first-stage pins 5 and at least two second-stage pins 6, the first-stage pins 5 are positioned at one end of the opening of the magnetic core cavity 3, and the second-stage pins 6 are positioned at one end of the opening of the magnetic core cavity 3; the first stage pins 5 and the second stage are disposed against the bottom wall 101.

In this embodiment, the insulating housing 1 is injection molded. The insulating housing 1 further comprises a top wall 103 and a back wall 104, the bottom wall 101, the top wall 103, the back wall 104 and the two side walls 102 enclosing together the insulating housing 1, and since the insulating housing 1 is not provided with a front wall, a magnetic core cavity 3 with an opening is formed inside the insulating housing 1. It is known that the coil 2 is wound on the magnetic ring and the lead-out terminal is connected to the first stage pin 5 or the second stage pin 6.

In this embodiment, the first-stage pins 5 and the second-stage pins 6 are in one-to-one correspondence, and the connecting lines between the first-stage pins 5 and the second-stage pins 6 which are set up in any pair are parallel to each other and to the axis of the magnetic core cavity 3, so that the structural layout is optimized, the creepage distance and the electric gap between the first-stage pins 5 and the second-stage pins 6 of the transformer are better increased, the insulation performance of the first-stage pins 5 and the second-stage pins 6 is better improved, and the design requirement of high withstand voltage isolation is better met.

It can be seen that, based on the structural features of the present embodiment, the opening of the magnetic core cavity 3 is not disposed on the bottom wall 101, so that compared with the technical solution that the opening of the magnetic core cavity 3 is downward, the present embodiment has better ventilation performance, so as to improve the heat dissipation effect.

For better use of the present embodiment, at least one sidewall 102 has at least two lead slots 4. Further, any two lead grooves 4 are arranged in parallel.

Still further, in this embodiment, the side walls 102 on both sides of the bottom wall 101 are provided with the wire grooves 4.

In the present embodiment, each of the two side walls 102 has two lead grooves 4, and any two lead grooves 4 are parallel to each other. The coil 2 comprises a primary coil and a secondary coil, which are evenly distributed around the magnetic core. After the outgoing line of the primary coil in the magnetic core cavity 3 is led out from the opening of the magnetic core cavity 3, the outgoing line of the secondary coil can be directly connected to the first-stage pin 5, and the outgoing line of the secondary coil passes through the lead groove 4 to be led out from the opening end of the magnetic core cavity 3 towards the back wall 104 and is connected to the second-stage pin 6. In other embodiments, the secondary coil may be connected to the first stage pin 5 and the primary coil may be connected to the second stage pin 6.

For better use of the present embodiment, any one of the lead grooves 4 has a relief portion 7 at an end near the opening of the core cavity 3.

On any one of the side walls 102, the position corresponding to the lead groove 4 is close to the opening of the magnetic core cavity 3, and the avoiding part 7 is arranged to enable the lead wire to be positioned in the corresponding lead groove 4 after being bent, so that the transformer can be assembled more rapidly.

In the present embodiment, the number of first stage pins 5 matches the number of primary coils, and the number of second stage pins 6 matches the number of secondary coils. The number of lead grooves 4 matches the number of secondary coils.

When the number of the first-stage pins 5 is matched with the number of the primary coils and the number of the second-stage pins 6 is matched with the number of the secondary coils, the device can adapt to a specific structure and further meet the requirement of miniaturization design; when the number of the lead grooves 4 is matched with the number of the secondary coils, it is possible to adapt to a specific structure, further satisfying the demand for a miniaturized design.

Specifically, in this embodiment, the number of the first stage pins 5 and the second stage pins 6 is three, the number of the primary coil and the secondary coil is two, and the number of the lead grooves 4 formed on any one of the side walls 102 is two, that is, the number of the lead grooves 4 is four.

In this embodiment, the primary coil is an electrical input terminal, and is generally connected to a power source, and the secondary coil is an electrical output terminal, and is generally connected to an acting device.

It can be seen that, since in the present embodiment, both side walls 102 have the lead grooves 4, the number of secondary coils can be well arranged according to the actual situation, so as to achieve obvious distinction.

It should be further noted that the above-mentioned number of corresponding relationships does not necessarily represent a one-to-one correspondence, for example, in the present embodiment, a common pin may occur, and in other embodiments, a common pin is not required. However, it should be noted that the number of first stage pins 5 and second stage pins 6 should not be less than the number of pins required for the actual pinout leg, i.e. there are spare pins.

As shown in fig. 1 to 4, in the present embodiment, the first stage pins 5 and the second stage pins 6 are gull-shaped pins.

Specifically, the gull-shaped pin includes a first segment 501 and a second segment 502 that are continuously connected; in the mounted state, the first section 501 is located higher than the second section 502; the first section 501 is used for wire winding and/or wire welding, and the second section 502 is used for product surface mounting.

In this embodiment, the first stage pin 5 and the second stage pin 6 are connected to the bottom wall 101 through the respective first sections 501, and it should be noted that the first sections 501 and the second sections 502 are connected through the connecting sections, so that after the first sections 501 are connected to the bottom wall 101, the lead wires can be wound or welded at the positions of the first sections 501, and of course, the connection positions of the first sections 501 and the connecting sections can also be wound or welded.

For better use of the present embodiment, the surface planes of all first stage pins 5 and all second stage pins 6 are in the same plane.

It can be known that the surface faces of the second sections 502 of the first-stage pins 5 and the second-stage pins 6 are all located on the same plane, so that the situation that an operator performs additional position state adjustment when actually connecting the transformer is avoided, and therefore the installation efficiency of the transformer is improved.

On the basis of the above embodiments, the embodiments can be used for a battery management system. It is known that the battery management system includes a high voltage control module including the high isolation high frequency transformer disclosed in this embodiment.

In the prior art, the requirements on the isolation withstand voltage of the primary and secondary of the isolation transformer are higher and higher, and in the actual use process, the requirements on the reinforced insulation between the primary and secondary are met, and the requirements on the creepage distance of the primary and secondary are ensured. Based on this, through the structural design of this embodiment, not only can directly be applicable to the high voltage control part of battery management system, but also can be used for other application scenarios that need higher electrical clearance. Meanwhile, on the premise that the size of the transformer occupied by the plate is not increased, the miniaturization is realized.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the utility model, and the scope of the utility model should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the utility model, and such modifications and adaptations are intended to be comprehended within the scope of the utility model.

Claims

1. A transformer, comprising:

the first stage pin and the second stage are arranged near the bottom wall.

2. A transformer according to claim 1, wherein any one of the side walls has at least two lead slots.

3. A transformer according to claim 2, wherein any two lead slots are arranged in parallel.

4. A transformer according to any one of claims 1 to 3, wherein the side walls on both sides of the bottom wall are provided with lead grooves.

5. A transformer according to any one of claims 1 to 3, wherein the surface mount of all first stage pins and the surface mount of all second stage pins are in the same plane.

6. A transformer according to any one of claims 1 to 3, wherein one end of any one of the lead slots adjacent to the opening of the core cavity has a relief portion.

7. A transformer according to any one of claims 1 to 3, wherein the first stage pin and the second stage pin are gull-shaped pins.

8. The transformer of claim 7, wherein the gull-shaped pin comprises:

a first section and a second section connected in series;

9. A high voltage control module comprising a transformer according to any one of claims 1 to 8.

10. A battery management system comprising the high voltage control module of claim 9.