WO2012129959A1

WO2012129959A1 - Voltage regulator brush holder assembly

Info

Publication number: WO2012129959A1
Application number: PCT/CN2012/000378
Authority: WO
Inventors: 叶勤书; 李华锋; 施骞
Original assignee: 上海法雷奥汽车电器系统有限公司
Priority date: 2011-03-30
Filing date: 2012-03-27
Publication date: 2012-10-04

Abstract

Disclosed is a voltage regulator brush holder assembly connected by a multilayered circuit, comprising: a chip (230) and a brush holder (210), the chip (230) being connected to the inner interface of the brush holder (210); the inner interface of the brush holder (210) is connected to the outer interface of same by means of the multilayered circuit which comprises a power layer and a signal layer (223), said power layer comprising a power input layer (221) and a power output layer (222). The brush holder of the voltage regulator is injection molded in a single piece.

Description

Voltage regulator brush holder assembly

Technical field

The invention relates to the technical field of automobile generators, in particular to a voltage regulator brush holder assembly.

Background technique

At present, the automobile generator voltage regulator brush holder assembly mostly uses a semiconductor device on a substrate or a thick film circuit to manufacture a monolithic integrated circuit voltage or thick film integrated circuit regulator (chip). The foot is connected to the brush holder by soldering. As shown in Fig. 1, Fig. 1 is a schematic view showing the overall structure of a voltage regulator brush holder assembly commonly used in the prior art. The voltage regulator includes a chip 130 and a pin 131. The chip 140 is an integrated circuit in the form of a heat-dissipating shell package. The chip is placed in parallel on the brush holder, and the pins 131 of the chip 140 vertically protrude from the heat-dissipating heat-receiving housing of the voltage regulator, respectively. The power circuit of the brush holder is connected to the signal circuit. The chip 130 housing is fixed to the brush holder 110 by mechanical or welding. A plurality of metal circuit pieces 120 are disposed inside the brush holder 110. The chip 130 is connected to the brush holder external circuit through the metal circuit piece 120 to realize electrical functions.

The above-mentioned voltage regulator brush holder assembly structure is characterized by using a special package chip, that is, an integrated circuit in which a die is packaged in a heat dissipation housing, which has high manufacturing cost and poor application adaptability. Due to the variety of structures of existing automotive generators, the variety of requirements for voltage regulator brush holder assemblies has made the voltage regulator brush holder assembly design and application have many limitations.

Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the deficiencies of the prior art and to provide a voltage regulator brush holder assembly having a multi-layer line connection, the voltage regulator brush holder assembly being highly adaptable.

The invention discloses a multi-layer line-connected voltage regulator brush holder assembly, comprising a chip and a brush holder, wherein the chip is connected with an inner interface of the brush holder, and the internal connection confirmation of the brush holder is The port is connected to the outer interface of the brush holder through a multi-layer circuit comprising a power layer and a signal layer, the power layer comprising a power input layer and a power output layer.

Further, the power input layer, the power output layer, and the interface of the signal layer and the chip are on a plane.

Further, the chip is an in-line chip.

Further, the signal layer is located between the power input layer and the power output layer. Further, the power layer is a power circuit composed of a metal conductor, and the signal layer is a signal circuit composed of a metal film of a printed circuit board. The printed circuit board includes at least two openings. The opening is a rectangular hole. A connection port of the power layer to the chip is placed in the rectangular hole. The connection port includes a recess in which the pins of the chip are placed. This groove is used to fill the solder.

The invention also discloses a brush holder assembly for a voltage regulator, wherein the chip of the voltage regulator and the peripheral circuit are connected by a multi-layer circuit, and the brush holder of the voltage regulator is injection-molded into one body.

Still further, the multilayer circuit includes a signal layer and a power layer, the power layer including a power input layer and a power input layer.

Further, the power input layer is connected to the B+ port of the peripheral circuit, the signal layer is connected to the L port, the DFM port and the P port of the peripheral circuit, and the power output layer is connected to the F+ port of the peripheral circuit, the power input layer The signal layer and the power output layer are both connected to the GND port of the peripheral circuit.

Further, the signal layer is located between the power input layer and the power output layer. Further, the power input layer and the power output layer are power circuits composed of metal sheets; the signal layer is a signal circuit composed of a printed circuit board.

Further, an opening is provided on the printed circuit board for placing the pins of the power input layer and the power output layer.

Further, the voltage regulator has two heat sinks, one of which has a heat sink position On the outside of the power input layer, another heat sink is located outside the chip.

Further, the bottom end of the heat sink located outside the power input layer is injection molded integrally with the brush holder.

Further, the outer fins located on the chip are fixed to the brush holder. Further, an outer fin located on the chip is riveted to the brush holder.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural view of a voltage regulator brush holder assembly in the prior art; FIG. 2 is a schematic structural view of a voltage regulator brush holder assembly according to the present invention; FIG. 3 is a voltage adjustment according to the present invention. A schematic view of a portion BB of the brush holder assembly;

Figure 4 is a cross-sectional view showing the A-A of the voltage regulator brush holder assembly according to the present invention; Figure 5 is a partially enlarged cross-sectional view showing the multilayer circuit of the voltage regulator brush holder assembly according to the present invention;

Figure 6 is a schematic exploded view of a specific embodiment of the present invention. Main symbol description:

110 brush holder 120 metal circuit piece

131 pin 130 chip

200 brush holder assembly 210 brush holder

221 power input layer

221a input layer internal interface

222 power output layer

222a output layer internal interface

222b output layer external interface 223 signal layer

223a signal layer inner end interface 223b signal layer outer end interface

229 Grounding 229a Grounding Inner End Interface

229b grounding external interface

230 chip 231 pins

2 internal interface

241 inner end interface upper end 244 groove

250 printed circuit board 251 rectangular hole

262 heat sink 261 heat sink

270 plastic filling 290 coupling plane

510 first surface 520 second surface preferred embodiment

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

The voltage regulator brush holder assembly provided by the invention comprises a chip and a brush holder. Please refer to Figure 2 for the specific implementation. The voltage regulator brush holder assembly includes a chip 230 and a brush holder 210, wherein the chip 230 is fixed to the brush holder 210. The brush holder 210 includes an internal port, an external port, and a multi-layer line, wherein the internal port 2 refers to the connection of the pin 231 of the chip 230 to the multi-layer line, and the external port refers to the periphery of the multi-layer line and the brush holder. Where the circuit is connected. A plurality of external ports are shown in detail in FIG. 2, including an external port 221b connected to the B+ port (battery positive port), an L port (charge indicator port) of the peripheral circuit, and a DFM port (generator operating state signal output terminal) ), P port (phase line) Loop signal port) The connected external port 223b, the external port 222b connected to the F+ port of the peripheral circuit (the excitation power supply positive port of the generator). As shown in FIG. 2, the above external ports are arranged in a three-dimensional dislocation state either parallel to the XY plane or the vertical XY plane.

In the prior art, as shown in FIG. 1, since a chip in the form of a heat-dissipating case package is used, the chip 0 is placed in parallel on the brush holder, and the pin 131 of the chip 140 protrudes perpendicularly to the voltage regulator. The heat dissipation housing is respectively connected to the power circuit and the signal circuit of the brush holder through the pin 131. The chip 130 housing is fixed to the brush holder 110 by mechanical or splicing. A plurality of metal circuit pieces 120 are disposed inside the brush holder 110, and the chip 130 is connected to the brush holder external circuit through the metal circuit piece 120. In the present invention, in order to reduce the total cost of the voltage regulator brush holder assembly, a chip in the form of a heat sink housing is replaced with a push-in chip. The difference between the in-line chip and the chip in the heat-dissipating case package is that the pins of the in-line chip are taken out from one or more sides of the packaged chip and arranged in a straight line, that is, the in-line chip is arranged in a 2D plane. of. Since the pins 231 of the chip 230 are linearly distributed along a plane, the circuits of other components of the generator are 3D-dimensionally distributed, and the inner and outer end interfaces are crossed. Therefore, in the present embodiment, a hierarchically multi-layered circuit is provided, and the inner end interface 2 of the multi-layer line can be coupled to the chip pin 231 of the plane distribution, and the other end can be connected to the external end interface of the stereoscopic distribution. . The multi-layer circuit includes a signal layer and a power layer according to functions, wherein the signal layer is used for transmitting a weak electric signal and is connected to a control circuit, and the power layer is used for transmitting a strong electric signal and is connected to the power circuit. The power layer is further divided into a power input layer and a power output layer. The signal layer 223, the power input layer 221 and the power output layer 222 are respectively located on different planes, and the three are not in contact with each other in space, and are insulated from each other, but the inner end interface 2 (ie, the end connected to the chip) is located. One The plane 290 is soldered to the pin 231 of the chip 230 on the coupling surface 290. 3 is a cross-sectional view showing a portion BB of the voltage regulator brush holder assembly according to the present invention, and the distribution of the inner end interface is detailed in FIG. As shown in Fig. 3, the portion inside the dotted line in the figure is the inner end interface 2. The inner end interface 2 includes an interface with a multi-layer line and an interface with a ground end 290. The internal interface 2 includes, in order, a signal layer inner end interface 223a, a ground inner port 229a, a power output layer inner port 222a, and a power output layer inner port 221a. The inner ports are brought into contact with the upper and lower surfaces of the chip pins 231 simultaneously or separately, thereby achieving the twisting of the multilayer lines in one plane.

4 is a cross-sectional view showing a cross section of a voltage regulator brush holder assembly according to the present invention, and FIG. 5 is a partially enlarged cross-sectional view showing a multilayer circuit of the voltage regulator brush holder assembly according to the present invention, with reference to FIGS. 4 and 5. You can understand in detail how to implement multilayer circuits. As shown in Figure 4, chip 230 is placed inside the voltage regulator brush holder assembly 200 with pins 231 parallel to the horizontal plane. In the present embodiment, the coupling plane is on the same plane as the signal layer 223. The signal layer 223 of the voltage regulator brush holder assembly is comprised of a printed wiring board 250. The surface of the printed wiring board 250 is preliminarily provided with a metal film which constitutes the signal layer 223 in accordance with the design requirements of the control circuit. At the same time, the printed wiring board 250 is provided with a plurality of through holes 251, and one end of the power layer is fixed in one of the through holes 251. The through hole can be designed to be rectangular in order to facilitate installation and use. Therefore, although one end of the signal layer and the power layer are disposed to cross each other and connected to a vertical peripheral circuit, the other end can be connected to a planar chip pin.

The power output layer 222 is an electrical conductor, preferably a metal sheet. The outer end interface 222b of the power output layer 222 is connected to the peripheral circuit, and the other end 222a is placed on the printed circuit. Inside the opening of the road plate 250. The internal port 222a of the power output layer 222 is designed to have a shape with a recess 244. When pin 230 of chip 230 and power output layer internal port

When 222a is connected, pin 231 is pushed to the middle of the groove 244, and the pin 231 is pressed by the upper end 241, forcing the pin 231 to be fixed between the upper end 241 and the lower end, and thus the pin

231 is coupled to power output layer 222. Similarly, another embodiment may be employed in which the reserved space of the recess 244 is increased and used as a dip tank. This also maintains the connection of pin 231 to power output layer 222. Similarly, since multiple printed circuit board openings are located on the same plane, the power input layer

221 and pin 231 can be connected in the same manner. . . . The printed circuit board metal film of the signal port 233a is in direct contact with the chip pin 231, and the metal film is larger than the lead 231, which is convenient for splicing. Signal layer 223 is on the printed circuit board

Formed on the 250, the surface of the printed wiring board 250 is preliminarily provided with a metal film circuit at a predetermined position according to the design requirements of the control circuit, and the metal film constitutes a signal layer.

223. In general, the control circuit of signal layer 223 and P port 222b of external interface 320

(Phase signal port), DFM port (auxiliary port), L port (charge indicator port) connection. The printed circuit board metal film circuit starts from the inner end interface 223a that is connected to the chip pin 231 and extends on the printed circuit board to the P port (phase signal port) of the signal layer outer end interface 223b. The power input layer 221 abuts the metal-free film area of the printed circuit board. At the same time, the power output layer 222 is located on the other side of the printed circuit board and is insulated from the metal film region by injection molding. This causes the metal film signal layer 223 to be insulated from the other layer circuits and then integrally molded with the entire brush holder 210.

The brush holder 210 is injection molded as one body, and the top is a heat sink 261 located at the power input layer. On the outer side, the bottom of the heat sink 261 is integrally molded with the brush holder 210; the bottom of the voltage regulator assembly is a heat sink 262 located outside the power output layer and fixed to the brush holder 210 by an interference fit. The chip 230 of the voltage regulator is mounted between the heat sink 261 and the heat sink 262, and the printed circuit board 250 of the signal layer is molded into the brush holder 210. Thus, the chip 240 of the voltage regulator is connected to an external circuit through a port in the power layer, the signal layer, and the ground. At the same time, the voltage regulator chip 230 is located between the heat sink 261 and the heat sink 262, and the heat dissipation effective area is increased by the double layer heat dissipation method.

Figure 6 is a schematic exploded view of a specific embodiment of the present invention. The voltage regulator assembly is composed of a heat sink 261, a brush holder 210, a metal piece 221, a power input layer, a metal piece 222, a power output layer, a signal layer 223 composed of a metal film of the printed circuit board 250, and a grounding of the metal piece 229. The end, the chip 230 and the heat sink 262 are combined. The printed circuit board 250 has a first surface 510 and a second surface 520. The metal piece 221 and the metal piece 222 are above the first surface 510 of the printed circuit board 250. The lead of the metal piece 221 penetrates the first surface 510 and is connected to the chip 230 at the second surface 520. The pins of the metal piece 222 penetrate the printed circuit board 250 from the first surface 510 and are connected to the chip 230 at the second surface 520. The metal piece 229 is located below the second surface 520 of the printed circuit board 250, wherein the pins of the metal piece 229 penetrate the printed circuit board 250 from the second surface 520 and are also connected to the chip 230 through the second surface 520. It can be seen that the power input layer 221, the power output layer 222, and the signal layer 223 are coupled to the pins 231 of the chip 230 in one plane, but are isolated from each other. Industrial applicability

The voltage regulator brush holder assembly disclosed in the present invention can effectively connect a planar two-dimensionally distributed chip pin to a three-dimensionally distributed generator circuit. The chip used in the invention is a general-purpose package chip, and the mass manufacturing cost is low, and the brush holder and the voltage adjustment can be utilized by using the chip. The assembly design is arbitrarily adjusted, so it is suitable for large-scale mass production and reduces the total cost of manufacturing. With the technical solution provided by the present invention, customization can be implemented.

Claims

Rights request

a multi-layer line-connected voltage regulator brush holder assembly, comprising a chip and a brush holder, wherein the chip is connected to an inner interface of the brush holder, and an inner interface of the brush holder passes through a multilayer line Connected to an outer interface of the brush holder, the multi-layer circuit includes a power layer and a signal layer, and the power layer includes a power input layer and a power output layer.

A voltage regulator brush holder assembly according to claim 1, wherein the power input layer, the power output layer, and the connection port of the signal layer and the chip are on a plane.

A voltage regulator brush holder assembly according to claim 1, wherein said chip is a push-in chip.

A voltage regulator brush holder assembly according to claim 1, wherein said signal layer is located between said power input layer and said power output layer.

A voltage regulator brush holder assembly according to claim 1, wherein said power layer is a power circuit composed of a metal conductor, and the signal layer is a signal circuit composed of a metal film of a printed circuit board.

A voltage regulator brush holder assembly according to claim 5, wherein said printed circuit board includes at least two openings.

A voltage regulator brush holder assembly according to claim 6, wherein said opening is a rectangular hole.

A voltage regulator brush holder assembly according to claim 7, wherein a connection port of the power layer to the chip is placed in the rectangular hole.

A voltage regulator brush holder assembly according to claim 8, wherein said connection port comprises a recess, and pins of said chip are placed in said recess. A voltage regulator brush holder assembly according to claim 9, wherein: The groove is used to fill the solder.

A brush holder assembly for a voltage regulator, wherein a chip of the voltage regulator and a peripheral circuit are connected by a multilayer circuit, wherein: the brush holder of the voltage regulator is injection molded as one body.

A voltage regulator brush holder assembly according to claim 11, wherein said multilayer circuit comprises a signal layer and a power layer, said power layer comprising a power input layer and a power input layer.

A voltage regulator brush holder assembly according to claim 12, wherein said power input layer is connected to a B+ port of said peripheral circuit, said signal layer and said L port of said peripheral circuit, The DFM port is connected to the P port, and the power output layer is connected to the F+ port of the peripheral circuit. The power input layer, the signal layer and the power output layer share a GND port and form a loop connection with the peripheral circuit.

A voltage regulator brush holder assembly according to claim 12, wherein said signal layer is located between said power input layer and said power output layer.

A voltage regulator brush holder assembly according to claim 11, wherein said power input layer and said power output layer are power circuits composed of metal sheets; said signal layer being composed of a printed circuit board Signal circuit.

A voltage regulator brush holder assembly according to claim 15, wherein said printed circuit board is provided with an opening for placing pins of said power input layer and said power output layer.

A voltage regulator brush holder assembly according to claim 11, wherein the voltage regulator has two heat sinks, wherein the first heat sink is located outside the power input layer, and the second heat dissipation The sheet is located on the outside of the chip.

A voltage regulator brush holder assembly according to claim 17, wherein the bottom end of the first heat sink is injection molded integrally with the brush holder. A voltage regulator brush holder assembly according to claim 17, wherein said second heat sink is mechanically fixed to said brush holder.

A voltage regulator brush holder assembly according to claim 17, wherein said second heat sink is riveted to said brush holder.