WO2012152195A1

WO2012152195A1 - Method for manufacturing led lamp light source component and led roadway lighting lamp involving said method

Info

Publication number: WO2012152195A1
Application number: PCT/CN2012/074838
Authority: WO
Inventors: 文新国
Original assignee: 陕西斯达煤矿安全装备有限公司
Priority date: 2011-05-11
Filing date: 2012-04-27
Publication date: 2012-11-15
Also published as: CN102278662A; CN102278662B

Abstract

A method for manufacturing an LED lamp light source component (11) and an LED roadway lighting lamp manufactured using the method. In the manufacturing method, an LED lamp bead (14) is first installed on an LED lamp bead PCB (15) by means of high-temperature hot-air soldering, and then the LED lamp bead PCB (15) provided with said LED lamp bead (14) is soldered to an aluminum-based heat conducting plate (7) at a lower temperature. The LED lamp light source component manufactured using the method is applicable to an LED roadway lighting lamp. The light source component (11) is installed on the heat-dissipation housing (6) of an LED roadway lighting lamp by means of soldering, said heat-dissipation housing (6) of the LED roadway lighting being cooling fins in the shape of a sunflower. The LED roadway lighting lamp has the benefits of good heat-dissipation performance, compact structure, good appearance, high efficiency, low energy cost, and long service life.

Description

Method for preparing LED light source assembly and LED roadway lamp related to the same

The invention relates to a method for manufacturing a lamp and a lamp, and particularly to a method for preparing an LED lamp light source assembly and an LED roadway lamp involved in the method.

Background technique

Thermal performance is one of the key factors affecting the life of LED lamps. During the use of LED lights, about 80% of the energy is converted into heat energy, and as the power density and packing density of the LED lamp products increase, the heat inside the lamps will inevitably accumulate, which will cause the wavelength of the light to drift and the light-emitting efficiency to decrease. And the problem of the life of the lamp is reduced.

Among the many factors related to the heat dissipation performance of LED lamps, the installation method of the light source component LED lamp bead, the LED lamp bead printed circuit board (LED lamp bead PCB) and the heat conducting plate is the most important factor in the preparation method of the light source component. one. Common installation and connection methods, such as the use of high thermal conductivity glue to connect the light source with the lamp holder or the heat conduction plate, improve the thermal conductivity between the light source and the lamp holder, and then effectively derive the heat. The LED roadway lamp disclosed in ZL201020132511.6 is the light source substrate. The heat is introduced into the light source panel through the high thermal conductivity silica gel layer, and is radiated into the air. Although this method can improve the heat dissipation performance of the lamp to a certain extent, in actual use, the heat conductive glue often appears to be off due to dryness. The thermal conductivity of the lamp is degraded, and there are undesirable phenomena such as light decay and dead light. In addition, the LED lamp bead and the LED lamp bead PCB are directly mounted on the lamp holder with good thermal conductivity by mechanical connection, which not only improves the thermal conductivity of the lamp. There are great limitations on the process, and in the process of processing the luminaire, the processing compaction is not easy to control, and it is easy to cause damage to the components. At the same time, the lamps prepared by mechanical connection are bulky and clumsy, and the parts are prone to occur during use. Loose and other phenomena.

The heat dissipation performance of the LED roadway lamp is directly dependent on the relevant structure inside the lamp, that is, in the luminous efficiency of the existing LED lamp, the heat emitted by the light source is effectively derived by the scientific selection of the component and the reasonable assembly between the components. That is, by optimizing the design, increasing the heat dissipation area and ventilation convection effect, and improving the surface emissivity, and using the conventional light source assembly mounting method, the lamp body is eventually increased. The increase in size and the cumbersome appearance affect the appearance.

Summary of the invention

In view of the defects or deficiencies of the prior art, the effect of the mounting connection between the components in the light source assembly of the LED lamp is to improve the heat dissipation performance of the lamp. The object of the present invention is to provide a method for preparing a light source component of the LED lamp. The method not only can stably and permanently assemble the components in the light source assembly, but also can improve the heat transfer performance of the light source component in the LED lamp, thereby optimizing the heat dissipation performance of the entire lamp.

In order to achieve the above technical tasks, the present invention adopts the following technical solutions:

A method for preparing an LED lamp light source assembly, characterized in that the method comprises the following steps: at least one LED lamp bead, a copper-based LED lamp bead printed circuit board and an aluminum-based heat conduction plate with a lamp bead base as components; :

Step one, applying solder paste at a position where the lamp bead base of the LED lamp bead is connected with the LED lamp bead printed circuit board; after applying the solder paste, hot air welding is performed at 230 ° C - 260 ° C, thereby obtaining LED mounted LED bead printed circuit board of lamp beads;

Step 2: plating the portion of the LED printed circuit board on the aluminum-based heat conducting plate for copper plating; tinning the portion of the LED lamp bead printed circuit board obtained in the first step with the aluminum-based heat conducting plate; and then plating the copper The aluminum-based heat-conducting plate is coated with solder paste at a position where the tin-plated LED lamp bead printed circuit board is connected; after the solder paste is applied, hot-air welding is performed at 225 ° C - 255 ° C to obtain an LED lamp light source assembly.

In the second step, the copper plating is performed by a bonding process, and the thickness of the copper plating layer is 30 micrometers to 50 micrometers; and the thickness of the tin plating layer is 100 micrometers to 150 micrometers.

The LED lamp bead is a patch type lamp bead.

In the second step, the solder paste is applied to the entire surface of the copper-plated aluminum-based heat conducting plate and the tin-plated LED lamp bead printed circuit board.

Another object of the invention is the use of an LED lamp source assembly prepared by the above method for the preparation of an LED roadway lamp.

Scientifically selecting the light source components and auxiliary heat dissipating components in the LED roadway lights, and using these components It is scientifically and rationally assembled with other components such as circuits, and another object of the present invention is to provide an LED roadway lamp which has good heat dissipation performance, long service life and small volume, which is produced by the above application. To achieve this technical task, the present invention adopts the following technical solutions:

An LED roadway lamp includes a light source assembly, a driving circuit board, and a heat dissipation housing, wherein the light source assembly is a light source assembly obtained by the above method, wherein the aluminum-based heat conduction plate of the light source assembly is mounted on the heat dissipation housing The bottom portion is assembled into a cavity with the heat dissipation housing, and the driving circuit board is mounted in the cavity. The copper-based LED lamp bead printed circuit board and the LED lamp bead of the light source assembly are located outside the cavity, and the copper base of the light source component The LED lamp bead printed circuit board is electrically connected to the driving circuit board.

The heat dissipation housing is a sun heat dissipation fin.

The aluminum-based heat conducting plate is provided with a wire through hole, and the wire passing through the wire through hole is connected with the copper-based LED lamp bead printed circuit board and the driving circuit board.

The roadway lamp further includes a cable passage, the cable passage includes a top case fixed to the top of the heat dissipation case, a connection hole disposed on the top case, and a compression nut threadedly connected to the connection hole, wherein the connection hole is inside A waterproof rubber is disposed, and a hollow steel sheet is disposed between the waterproof rubber and the compression nut, and a top cover is mounted on the top of the top shell.

The roadway lamp further includes a transparent cover, the transparent cover is mounted on the aluminum-based heat-conducting plate by bolts, and a pressing ring is disposed between the bolt and the transparent cover, and a gasket is disposed between the transparent cover and the aluminum-based heat-conductive plate.

Compared with the prior art, the present invention has the following technical effects:

(1) For the first time, the present invention uses soldering as the only connection method between the components in the preparation method of the LED light source component, and does not assist other thermal adhesives and mechanical connection modes, completely eliminating the installation of the light source components in the original LED lamp. The disadvantages of the process are that the obtained product has poor heat dissipation performance, short service life, and difficult to control the preparation process conditions.

(2) The base with good heat resistance during the preparation of the light source component is a copper-based LED lamp bead. In order to inspect the PCB of the soldered lamp bead, the LED lamp bead is soldered to the copper base at a higher temperature. On the LED lamp bead PCB, the copper-based LED lamp bead PCB soldered with the LED lamp bead is soldered to the aluminum-based heat-conducting plate in the lamp at a lower temperature, and the LED lamp bead is soldered according to the welding temperature requirement. Used The melting point of the solder paste is higher than the melting point of the solder paste used to solder the copper-based LED lamp bead PCB. In the process, the characteristics of aluminum and copper during soldering shall be copper and tin-plated on the aluminum-based heat-conducting plate and the copper-based LED lamp bead PCB, and plated on the copper-based LED lamp bead PCB. Tin can greatly shorten the welding time and improve the welding quality. (3) The LED roadway lamp of the invention has the characteristics of compact structure, beautiful appearance, moisture and earthquake resistance, high efficiency and long life.

(4) The total area of heat dissipation of the LED roadway lamp of the present invention is relatively small, but the heat dissipation rate is improved, the heat resistance is good, and the product has a long service life, and the product volume is small and beautiful.

(5) The LED roadway lamp of the present invention is suitable for use as a lighting fixture in a coal mine working face, a roadway, and a diverticulum having a danger of methane or coal dust explosion.

DRAWINGS

Figure 1 is a schematic structural view of the present invention;

Fig. 2 is an enlarged schematic view showing the structure at B in Fig. 1.

The present invention will be further described in detail below with reference to the embodiments and the accompanying drawings.

Specific form

Soldering is a soldering method in which a low melting point metal solder is used to heat and melt, and penetrates and fills the gap between the metal parts. Because the solder is often a tin-based alloy, hence the name. It is widely used in the electronics industry. At the same time, the thermal conductivity of tin is also superior. The invention is based on the characteristics of the tin material and the characteristics of the soldering. The following steps are taken to prepare the light source assembly in the LED lamp:

In the preparation process, the LED lamp bead, the copper-based LED lamp bead printed circuit board and the aluminum-based heat conducting plate with at least one lamp bead base are used as components, and the following steps are specifically adopted:

Step one: Apply solder paste to the position of the LED lamp bead base and the LED lamp bead printed circuit board. The specific application method is: or apply on the corresponding position of the copper-based lamp bead base of the LED lamp bead. Or smearing on the corresponding position of the copper-based LED lamp bead PCB, or properly affixing at the corresponding position of the copper-based lamp bead base of the LED lamp bead and the corresponding position of the copper-based LED lamp bead PCB, and then docking the two; After applying the solder paste, hot air welding is carried out at 230 ° C - 260 ° C to obtain LED lamp beads. LED lamp bead printed circuit board;

Step 2, the part of the LED printed circuit board is plated with copper on the aluminum-based heat conducting plate, the copper plating process is a bonding process, and the thickness of the plated copper layer is 3 micrometers 0 to 50 micrometers; the LED lamp beads obtained in the first step The part of the printed circuit board that is connected to the aluminum-based heat-conducting plate is tin-plated, the tin-plating process is a general conventional process, and the tin-plated layer has a thickness of 100 μm to 150 μm; then the copper-plated surface and the LED are on the aluminum-based heat conductive plate. Solder paste is applied to the surface where the tin-plated surface of the lamp bead is connected. The specific application method is as follows: Apply solder paste to the corresponding part of the aluminum-based heat-conducting plate, or copper-based LED with LED lamp bead installed. Solder paste on the corresponding part of the lamp bead PCB, or solder paste on the corresponding part of the aluminum-based heat-conducting plate and the corresponding part of the copper-based LED lamp bead PCB on which the LED lamp bead is mounted; after applying the solder paste at 225 °C- Hot air welding was carried out at 255 ° C to finally produce an LED light source assembly.

The LED lamp bead used in the above preparation process is preferably a patch type lamp bead.

The tin connecting the LED lamp bead and the LED lamp bead printed circuit board in the above step 1 has electrical conduction, connection and heat conduction, and the tin connecting the LED lamp bead printed circuit board and the aluminum-based heat conduction plate in the second step has connection and heat conduction. In order to make the components fully connected, in the second step, the solder paste is applied to the entire surface of the surface of the aluminum-based heat-conducting plate which is plated with copper and the surface of the LED lamp-printed circuit board.

The temperature in the above step 1 is lower than the hot air welding temperature in the second step, and the installed LED lamp beads are prevented from falling off.

The LED lamp light source assembly prepared by the above method is used for preparing an LED roadway lamp. The LED roadway lamp of the application comprises a light source assembly 11, a driving circuit board 12, a heat dissipation housing 6, the light source assembly 11 is a light source assembly manufactured by the above method, and the aluminum-based heat conduction plate 7 of the light source assembly 11 is fitted to The bottom of the heat dissipation housing 6 is assembled into a cavity with the heat dissipation housing 6. The driving circuit board 12 is mounted in the cavity, and the LED lamp bead printed circuit board 15 and the LED lamp bead 14 of the light source assembly 11 are located in the cavity. Externally, the LED bead printed circuit board 15 of the light source assembly 11 is electrically connected to the drive circuit board 12.

As a completely new application, the above-mentioned heat dissipation housing 6 is a solar heat dissipation fin.

A specific light source assembly of the copper-based LED lamp bead printed circuit board 15 is electrically connected to the driving circuit board 12, a wire through hole is formed in the aluminum-based heat conducting plate 7, a wire passing through the wire through hole and a copper-based LED The lamp bead printed circuit board 15 is connected to the driving circuit board 12, and electrical connection between the LED lamp bead printed circuit board 15 and the driving circuit board 12 is realized.

For the purpose of general purpose, the above-mentioned roadway lamp further includes a cable passage including a top case 16 fixed to the top of the heat dissipation housing 6 and a wiring hole 2 provided on the top case 16 and screwed to the connection hole 2. a pressure rubber 5 is disposed in the wiring hole 2, and a waterproof rubber 3 is disposed between the waterproof rubber 3 and the compression nut 5. In addition, the LED roadway lamp further includes a top cover 1. The top cover 1 is mounted on the top of the top case 16.

The above-mentioned roadway lamp further includes a transparent cover 10 which is mounted on the aluminum-based heat conducting plate 7 and assembled into a cavity A in the aluminum-based heat conducting plate 7, in which the LED lamp bead 14 is located. The transparent cover 10 can be attached to the aluminum-based heat-conducting plate 7 by bolts, and a pressure ring 9 is disposed between the bolt and the transparent cover 10, and a gasket 8 is disposed between the transparent cover 10 and the aluminum-based heat-conductive plate 7.

It should be noted that the specific circuit configuration on the driving circuit board 12 used in the LED roadway lamp is prior art, and the specific design is as GB/T24825_2009.

The following is an embodiment given by the inventors, and it should be noted that this embodiment is a further explanation and description of the present invention, and the present invention is not limited to the embodiment.

Example 1

In this embodiment, the chip-type LED lamp bead, the copper-based LED lamp bead printed circuit board and the aluminum-based heat conducting plate with twenty-eight bases are copper-based components, and the specific preparation steps are as follows:

Step 1: Apply solder paste to the position where the lamp bead base of each LED lamp bead is connected with the LED lamp bead printed circuit board, apply the solder paste, and perform hot air welding at 250 ° C to obtain the LED lamp bead. LED lamp bead printed circuit board;

Step 2, the part of the LED printed circuit board mounted on the aluminum-based heat conducting plate is plated by a bonding process, and the thickness of the plated copper layer is 40 micrometers; then the LED lamp bead printed circuit board obtained in the first step is thermally conductive with the aluminum base. The parts where the plates are connected are tinned by a conventional process, and the thickness of the tin-plated layer is 130 micrometers; then the solder paste is applied to the entire surface of the aluminum-based heat-conductive plate copper-plated surface and the tin-plated surface of the LED lamp bead printed circuit board. After applying the solder paste, hot air welding is performed at 245 ° C to finally obtain an LED light source assembly. The LED lamp light source assembly prepared by the method of the above Embodiment 1 is used for preparing an LED roadway lamp. The LED roadway lamp of the application comprises the light source component 11 prepared by the above method, the driving circuit board 12, and the sun cooling fin type heat dissipation housing 6 The aluminum-based heat conducting plate 7 of the light source assembly 11 is mounted on the bottom of the heat dissipation housing 6 and assembled into a cavity with the heat dissipation housing 6. The driving circuit board 12 is mounted in the cavity, and the light source assembly 11 is disposed. The LED lamp bead 14 and the LED lamp bead PCB 15 are located outside the cavity, and the LED lamp bead printed circuit board 15 of the light source assembly 11 and the driving circuit board 12 are passed through the through-holes of the wires provided on the aluminum-based heat conducting plate 7. The wires are electrically connected. The final performance is that the LED lamp bead 14 and the LED lamp bead PCB15 are electrically connected by soldering, and the copper-based LED lamp bead PCB 15 is integrally soldered to the aluminum-based heat conducting plate 7;

The aluminum-based heat conducting plate 7 is mounted with a transparent cover 10, and the transparent cover 10 is assembled with the aluminum-based heat conducting plate 7 into a cavity B. The LED lamp bead 14 and the LED lamp bead PCB 15 are located in the cavity B; The top of the 6 is provided with a cable passage including a top case 16 fixed to the top of the heat dissipation housing 6 and a wiring hole 2 disposed on the top case 16 and a compression nut 5 screwed to the connection hole 2, A waterproof rubber 3 is disposed in the wiring hole 2, and a hollow steel sheet 4 is disposed between the waterproof rubber 3 and the compression nut 5; the LED roadway lamp further includes a top cover 1, and the top cover 1 is mounted on the top case 16. the top of.

Example 2:

The difference between this embodiment and the embodiment 1 is that the temperature of the LED lamp bead 14 and the LED lamp bead PCB 15 is 255 ° C, and the soldering temperature between the LED lamp bead PCB 15 and the aluminum-based heat conducting plate 7 is 250 °. C. Example 3:

The difference between this embodiment and the embodiment 1 is that the temperature of the LED lamp bead 14 and the LED lamp bead PCB 15 during soldering is 230 ° C, and the soldering temperature between the LED lamp bead PCB 15 and the aluminum-based heat conducting plate 7 is 225 °. C.

Claims

Rights request

A method for preparing an LED lamp light source assembly, characterized in that the method comprises a copper lamp bead, a copper-based LED lamp bead printed circuit board and an aluminum-based heat conduction plate with at least one lamp bead base as components, according to the following The steps are carried out:

2. The preparation method according to claim 1, wherein in the second step, copper plating is performed by a bonding process, and the thickness of the copper plating layer is 30 micrometers to 50 micrometers; and the thickness of the tin plating layer is 100 micrometers. ~150 microns.

3. The method according to claim 1, wherein the LED lamp bead is a patch type lamp bead.

The preparation method according to claim 1, wherein in the second step, the solder paste is applied to the entire surface of the copper-plated aluminum-based heat conducting plate and the tin-plated LED lamp bead printed circuit board. .

5. An LED lamp light source assembly prepared by the method of claim 1 for use in the preparation of an LED roadway lamp.

The application according to claim 5, wherein the LED roadway lamp comprises a light source assembly (11), a driving circuit board (12), and a heat dissipation housing (6), wherein the light source assembly (11) is A light source assembly produced by the method of any one of claims 1, 2 or 3, wherein the aluminum-based heat conducting plate (7) of the light source assembly (11) is fitted to the bottom of the heat-dissipating casing (6) and to the heat-dissipating casing The body (6) is assembled into a cavity, the driving circuit board (12) is mounted in the cavity, and the LED lamp bead printed circuit board (15) and the LED lamp bead (14) of the light source component (11) are located in the cavity. External, light source assembly (11) LED bead printing The circuit board (15) is electrically connected to the drive circuit board (12).

The LED roadway lamp according to claim 6, wherein the heat dissipation housing (6) is a sun cooling fin.

The LED roadway lamp according to claim 6, wherein the aluminum-based heat conducting plate (7) is provided with a wire through hole, a wire passing through the wire through hole and a copper-based LED lamp bead printed circuit The board (15) is connected to the drive board (12).

9. The LED roadway lamp of claim 6, wherein the lane light further comprises a cable passage comprising a top case (16) and a setting fixed to the top of the heat dissipation housing (6) a wiring hole (2) on the top case (16) and a compression nut (5) threadedly connected to the wiring hole (2), wherein the wiring hole (2) is provided with a waterproof rubber (3), the waterproof rubber (3) A hollow steel piece (4) is disposed between the compression nut (5), and a top cover (1) is mounted on the top of the top case (16).

The LED roadway lamp of claim 6, wherein the roadway lamp further comprises a transparent cover (10), the transparent cover (10) is bolted to the aluminum-based heat conducting plate (7), and A pressure ring (9) is disposed between the bolt and the transparent cover (10), and a gasket (8) is disposed between the transparent cover (10) and the aluminum-based heat conduction plate (7).