CN116844827A - Oil-cooled high-power inductor and mounting method thereof - Google Patents

Abstract

The invention discloses an oil-cooled high-power inductor and an installation method thereof, wherein the oil-cooled high-power inductor comprises a shell, a top cover, a magnetic core, a coil and a lead wire, wherein a vent hole is formed in a middle column of the magnetic core and penetrates through the whole magnetic core body; the bottom is equipped with the circulation water course in the shell, the circulation water course includes water inlet and outlet, holds water cavity and bottom, hold water cavity in be equipped with a plurality of blend stops and form the rivers passageway, the water inlet and outlet sets up in the shell both sides respectively, the bottom is fixed with the shell bottom matching. The invention can better solve the heat dissipation problem of the product, so that the product can continuously output with high efficiency in a severe environment, and the product has small volume, but the output of power and efficiency is unchanged, thereby achieving the purpose of saving cost.

Description

An oil-cooled high-power inductor and its installation method

Technical field

The invention relates to an inductor for vehicle power supply and an installation method thereof, and in particular to an oil-cooled high-power inductor.

Background technique

At present, commonly used high-power inductors such as BOOST/BUCK are used because of their relatively large power and the use environment is usually under high temperature and high humidity conditions. Most of the existing heat dissipation methods are natural cooling, which causes the product's working efficiency to drop due to the environment and its own temperature being too high during use, and affects the entire power supply output efficiency to drop significantly. In addition, the current market demand for power supply products is mostly smaller in size and requires greater efficiency, which leads to the need to reduce the size of high-power inductors accordingly, which further causes the heat dissipation effect of the product itself to plummet. Therefore, in response to the urgent needs of the existing market and customers, the present invention can effectively solve the above problems and can better adapt to the needs of the market and customers.

Contents of the invention

In view of the shortcomings of the existing technology, the present invention provides an oil-cooled high-power inductor and an installation method thereof, which can better solve the heat dissipation problem of the product, enable it to sustain high-efficiency output in harsh environments, and reduce the product volume. It is small, but provides the same output of power and efficiency, achieving the purpose of cost saving.

In order to achieve the above object, the present invention provides the following technical solution: an oil-cooled high-power inductor, including a shell, a top cover, a magnetic core, a coil and a lead. A ventilation hole is provided at the center column of the magnetic core and runs through the entire magnetic core. Core body; a circulating water channel is provided at the bottom of the shell. The circulating water channel includes a water inlet and outlet, a water chamber and a bottom cover. A number of retaining bars are provided in the water chamber to form a water flow channel. The water inlets and outlets are respectively provided. On both sides of the housing, the bottom cover is matched and fixed with the bottom of the housing.

Preferably, the diameter of the ventilation hole is 2-4mm.

As a preference, the length, width and height of the housing are 162.15mm, 102.15mm and 71mm.

As a further improvement, the bottom of the housing and the inside of the top cover are provided with bumps to keep the coil in an overhead state.

Preferably, the coil is made of flat copper wire.

Preferably, the housing is made of die-cast aluminum.

An installation method for oil-cooled high-power inductors. After the magnetic core is wound into a coil, it is assembled in the casing. The wound coil is aligned with the bumps inside the casing to make the coil overhead, and then the bumps on the casing are aligned with each other. To calibrate the coil, firmly fix the coil inside the casing, fill it with ATF cooling oil until the coil is completely immersed; assemble the bottom cover at the bottom of the casing and fix it; after assembly, the two sides of the finished casing are the water inlet and outlet. The water inlet is connected to the cooling water channel in the car to circulate the water in the bottom water channel.

In the improvement of the magnetic core of the present invention, the finished product is subjected to thermal simulation. The maximum temperature at the winding points of the side posts on both sides is about 97.7 degrees Celsius. In order to reduce the temperature of the magnetic core and coil during operation and to ensure that the electrical performance of the product reaches the rated power, it is also Considering that the temperature at the center column of the magnetic core reaches about 95 degrees Celsius. Therefore, a 3mm ventilation hole is opened at the middle column of the magnetic core and runs through the entire magnetic core body, thus effectively solving the problem of dissipation of the internal temperature of the product. Even in a smaller size, when the product is in working condition, the internal temperature of the magnetic core will reach a certain degree of heat dissipation through the ventilation holes.

In the improvement of the winding wire of the present invention, the wire used in the product is a flat copper wire, which increases the heat dissipation area on the surface of the copper wire. It can also assist in dissipating heat when the temperature of the product is too high during operation, ensuring the output power and efficiency of the product.

In the improvement of the product casing of the present invention, the casing used in the product is die-cast aluminum, and this material itself has better heat dissipation. In order to achieve better heat dissipation effect, a circulating water channel is added at the bottom of the shell, and the circulating water in the water channel is used to take away the heat of the internal products.

The beneficial effects of the present invention are: a breathable hole is provided at the middle column of the magnetic core, which runs through the entire magnetic core body, so that the air permeability is better; a circulating water channel is provided at the bottom of the outer shell, which is connected to the cooling water channel in the car, so that the bottom The water flow in the water channel effectively solves the heat dissipation problem of the product, allowing it to continue to produce high-efficiency output in harsh environments; and the length, width and height of the product shell are 162.15mm, 102.15mm and 71mm, which is small in size but provides power and efficiency. The output remains unchanged, the output power and efficiency are stable, which increases the output power of the entire vehicle, reduces losses, increases service life, and achieves the purpose of saving costs.

Description of the drawings

Figure 1 is a schematic structural diagram of an embodiment of the present invention;

Figure 2 is a schematic diagram of the internal structure of an embodiment of the present invention;

Figure 3 is a schematic diagram of the bottom structure of the embodiment of the present invention;

Figure 4 is a schematic structural diagram of the magnetic core according to the embodiment of the present invention;

Figure 5 is a schematic cross-sectional view of the magnetic core according to the embodiment of the present invention;

Figure 6 is a schematic structural diagram of the circulating water channel according to the embodiment of the present invention;

Figure 7 is a schematic diagram of the interior of the top cover according to the embodiment of the present invention;

Figure 8 is a schematic diagram of the interior of the bottom cover according to the embodiment of the present invention;

In the picture: 1. Shell; 2. Magnetic core; 3. Coil; 4. Lead; 5.; 6. Water chamber; 7. Barrier; 8. Breathing hole; 9. Bump; 10. Bottom cover.

Specific embodiments: water inlet and outlet

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Embodiment 1: As shown in the accompanying drawings, an oil-cooled high-power inductor includes a shell 1, a top cover, a magnetic core 2, a coil 3 and a lead 4. The shell 1 is made of die-cast aluminum, and the shell 1 is long The width and height are 162.15mm, 102.15mm and 71mm, and the reduced volume can effectively reduce the vehicle power supply installation volume and product cost. The coil 3 is made of flat copper wire.

A ventilation hole 8 is provided at the middle column of the magnetic core and runs through the entire body of the magnetic core 2. The diameter of the ventilation hole 8 is 3 mm. A circulating water channel is provided at the bottom of the housing 1. The circulating water channel includes a water inlet and outlet 5, a water chamber 6 and a bottom cover 7. A number of retaining bars 7 are provided in the water chamber 6 to form a water flow channel. The water inlets 5 are respectively provided on both sides of the housing 1, and the bottom cover 10 is matched and fixed with the bottom of the housing 1. The bottom of the housing 1 and the inside of the top cover are provided with protrusions 9 to keep the coil 3 in an overhead state to achieve complete isolation and insulation between the coil 3 and the housing 1 and to ensure the heat dissipation distance between the coil 3 and the housing 1 .

Embodiment 2: An oil-cooled high-power inductor installation method. After winding the magnetic core 2 into a coil, assemble it in the housing 1. Place the wound coil 3 corresponding to the bumps inside the housing so that the coil 3 is overhead. Then align the bumps on the shell 1 with the coil 3, firmly fix the coil 3 inside the shell 1, fill it with ATF cooling oil until the coil 3 is completely immersed; assemble the bottom cover 7 at the bottom of the shell 1, and do It is easy to fix; after assembly, the two sides of the finished shell 1 are respectively the water inlet and the water outlet, which are connected to the cooling water channel in the vehicle to allow the water flow in the bottom water channel to circulate.

This invention is mainly used in gasoline vehicles, hybrid vehicles and pure electric vehicles. Due to the small size and weight of this product, the product can be easily fixed in the power box in the vehicle, and both ends are connected to the cooling water channel in the vehicle. The internal cooling water channel or coolant circulates to take away the heat of the product during operation, thereby making the product electrically stable under high power output conditions.

Claims (7)

1. The utility model provides an oil-cooled high-power inductor, includes shell (1), top cap, magnetic core (2), coil (3) and lead wire (4), its characterized in that: an air hole (8) is formed in the middle column of the magnetic core and penetrates through the whole magnetic core (2) body; the utility model discloses a water circulation device, including shell (1) and bottom, be equipped with the circulation water course in shell (1), the circulation water course includes water inlet and outlet (5), holds water cavity (6) and bottom (7), be equipped with a plurality of blend stop (7) in holding water cavity (6) and form the rivers passageway, water inlet and outlet (5) set up respectively in shell (1) both sides, bottom (7) are fixed with shell (1) bottom matching.

2. An oil-cooled high power inductor as claimed in claim 1, wherein: the diameter of the ventilation (8) holes is 2-4mm.

3. An oil-cooled high power inductor as claimed in claim 1, wherein: the length, width and height of the shell (1) are 162.15mm, 102.15mm and 71mm.

4. An oil-cooled high power inductor as claimed in claim 1, wherein: salient points (9) are arranged at the bottom of the shell (1) and inside the top cover, so that the coil (3) is in an overhead state.

5. An oil-cooled high power inductor as claimed in claim 1, wherein: the coil (3) adopts flat copper wires.

6. An oil-cooled high power inductor as claimed in claim 1, wherein: the shell (1) is made of die-cast aluminum.

7. An oil-cooled high-power inductor installation method is characterized in that: after winding a coil on a magnetic core (2), assembling the coil in a shell (1), enabling the wound coil (3) to correspond to salient points in the shell, enabling the coil (3) to be overhead, aligning the salient points on the shell (1) with the coil (3), firmly fixing the coil (3) in the shell (1), and filling the inside with ATF heat dissipation oil until the coil (3) is completely immersed; the bottom cover (7) is assembled at the bottom of the shell (1) and is fixed; the two sides of the assembled finished shell (1) are respectively provided with a water inlet and a water outlet, and the water inlets and the water outlets are connected into a cooling water channel in the vehicle so that water flow in a bottom water channel circularly flows.