KR101983968B1 - Power supply device having heat sink - Google Patents

Abstract

The present invention relates to a power supply, comprising: a rechargeable battery; A circuit board on which a plurality of elements for controlling charging and discharging of the rechargeable battery are formed; A heat sink disposed under the circuit board; A main case having an internal space for accommodating a rechargeable battery, a circuit board, and a heat sink; And an upper case and a lower case respectively coupled to the upper side and the lower side of the main case, and the plurality of elements are disposed on the upper side and the lower side of the circuit board.

Description

Technical Field [0001] The present invention relates to a power supply device having a heat sink,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply apparatus, and more particularly, to a configuration of an apparatus for supplying power to an electronic apparatus mounted in a vehicle.

Generally, the vehicle uses battery voltage at start-up, and is equipped with a battery and a generator to supply electric power to electric devices such as an automobile interior lamp, instrument, and air conditioner.

When the starter motor is rotated to start the engine, the AC generator connected to the engine by the fan belt is charged to charge the battery. However, since the capacity of the battery is limited, The battery can not be started due to carelessness of the battery, or the battery can not be started up due to carelessness, or the capacity and life of the battery may be shortened due to continuous charging and discharging.

Accordingly, in recent years, there has been an increase in the use of a secondary battery in addition to the main battery in order to sufficiently supply the electric energy required by the vehicle. In particular, in a vehicle such as a navigation or a black box, The power is supplied to the separately installed electronic device through the auxiliary battery so that the electronic device operates normally during the movement or stoppage of the vehicle.

Generally, the auxiliary battery is directly connected to the main battery of the vehicle or connected to the relay through the relay, and is supplied with the DC voltage output from the main battery.

In the above conventional art, when the auxiliary battery is directly connected to the main battery, the auxiliary battery is continuously charged even when the starting is turned off without considering the voltage state of the main battery, and the main battery may be discharged.

On the other hand, when the auxiliary battery is charged to the auxiliary battery only when the auxiliary battery is connected to the main battery through the relay and the starting is turned on, the auxiliary battery is not sufficiently charged according to the charging efficiency of the auxiliary battery, A problem that an electronic device such as a black box can not operate for a long time may occur.

Therefore, in the case of a secondary battery for a vehicle for supplying power to a black box or the like in addition to a commonly used power supply, it is necessary to have a structure capable of driving stably while shortening the time required for charging by increasing the charging speed Do.

SUMMARY OF THE INVENTION An object of the present invention is to provide a power supply device having a structure capable of shortening the charging time and assuring stable driving.

A power supply apparatus according to an embodiment of the present invention includes a rechargeable battery; A circuit board on which a plurality of elements for controlling charge and discharge of the rechargeable battery are formed; A heat sink disposed under the circuit board; A main case having an internal space for accommodating the rechargeable battery, the circuit board, and the heat sink; And an upper case and a lower case respectively coupled to the upper and lower sides of the main case, wherein the plurality of devices are disposed on the upper surface and the lower surface of the circuit board.

Meanwhile, the power supply device according to an embodiment of the present invention may be used as an auxiliary battery for a vehicle, which is charged through a power source supplied from a main battery provided in a vehicle, and is discharged to supply power to an electronic device provided in the vehicle .

According to an embodiment of the present invention, a part of the elements of the circuit board included in the power supply unit may be disposed on the lower side and a heat sink may be disposed on the lower side of the circuit board to improve the heat radiating effect of the power supply unit .

According to another embodiment of the present invention, a heat radiation plate, which is configured to be in contact with a part of the main case, is disposed on the upper side of the circuit board, thereby facilitating the heat radiation of the power supply device.

In addition, since a portion of the heat radiating plate disposed in the space between the upper case and the main case has a structure in which the opening is formed, heat generated in the circuit board or the like inside the power supply device is easily discharged to the outside, Therefore, even if the rechargeable battery is charged by using a high current to shorten the charging time, stable driving can be ensured without increasing the size.

According to another embodiment of the present invention, by using the power supply device having the above-described heat dissipation structure as an auxiliary battery for a vehicle, the battery is charged at a high speed from the main battery during operation of the vehicle, The power can be supplied stably.

1 is a perspective view showing a configuration of a power supply apparatus according to an embodiment of the present invention.
2 is an exploded perspective view illustrating an internal configuration of a power supply apparatus according to an embodiment of the present invention.
FIG. 3 is a view for explaining an embodiment of the configuration of the heat dissipation plate shown in FIG. 2. FIG.
4 is a view for explaining an embodiment of a configuration in which a heat dissipation plate is disposed in a space between an upper case and a main case.
5 is a cross-sectional view for explaining an embodiment of the configuration of the main case shown in FIG.
6 is a view showing an embodiment of a configuration in which a heat dissipation plate is connected to a circuit board.
7 is a view showing an embodiment of a configuration of elements formed on the upper surface of a circuit board.
8 is a view showing an embodiment of the constitution of the elements formed on the lower side of the circuit board.
9 is a view showing an embodiment of a configuration in which a heat sink and a circuit board are connected.
10 is a view for explaining an embodiment of a configuration for connecting a power supply device according to the present invention to a main battery and an electronic device of a vehicle.

The following merely illustrates the principles of the invention. Thus, those skilled in the art will be able to devise various apparatuses which, although not explicitly described or shown herein, embody the principles of the invention and are included in the concept and scope of the invention. Furthermore, all of the conditional terms and embodiments listed herein are, in principle, intended only for the purpose of enabling understanding of the concepts of the present invention, and are not intended to be limiting in any way to the specifically listed embodiments and conditions .

It is also to be understood that the detailed description, as well as the principles, aspects and embodiments of the invention, as well as specific embodiments thereof, are intended to cover structural and functional equivalents thereof. It is also to be understood that such equivalents include all elements contemplated to perform the same function irrespective of currently known equivalents as well as equivalents to be developed in the future.

Thus, for example, it should be understood that the block diagrams herein represent conceptual views of exemplary circuits embodying the principles of the invention. Similarly, all flowcharts, state transition diagrams, pseudo code, and the like are representative of various processes that may be substantially represented on a computer-readable medium and executed by a computer or processor, whether or not the computer or processor is explicitly shown .

The functions of the various elements shown in the figures, including the functional blocks depicted in the processor or similar concept, may be provided by use of dedicated hardware as well as hardware capable of executing software in connection with appropriate software. When provided by a processor, the functions may be provided by a single dedicated processor, a single shared processor, or a plurality of individual processors, some of which may be shared.

Also, the explicit use of terms that are presented in terms of processor, control, or similar concepts should not be construed to be exclusive of hardware capable of executing software, and may include, without limitation, digital signal processor (DSP) ROM, RAM (RAM), and non-volatile storage. Other hardware may also be included.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: There will be. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a power supply apparatus according to an embodiment of the present invention. The power supply apparatus includes a main case 100, an upper case 110, and a lower case 120 Lt; / RTI >

Referring to FIG. 1, the main case 100 has an internal space for accommodating a rechargeable battery and a circuit board. The main case 100 is made of a metal material having a high thermal conductivity, such as aluminum, May be formed in the vertical direction.

The rechargeable battery is a battery in which a voltage is restored by introducing a current that has already been discharged from the outside, and supplies a voltage charged by an external current to another electronic device.

Types of rechargeable batteries include electrochemical reactions such as nickel cadmium (Ni-Cd), alkaline batteries, Ni-Mh, sealed lead acid (SLA), lithium ion (Li- And may be a lithium iron phosphate battery (LiFePO4) according to an embodiment of the present invention. Lithium iron phosphate batteries (LiFePO4) have the advantages of fast charging efficiency and speed, and low risk of explosion.

On the other hand, a circuit board is provided with elements for controlling charge and discharge of the rechargeable battery. For example, a condenser, an inductor, a DC / DC converter and a field effect transistor (FET) Or the like may be disposed.

The capacitor can be used for over 5000 hours at an operating temperature of -55 ° to 105 °, a current of 330 μC can be controlled, and a ceramic capacitor is disposed in a dual structure for improving the maximum power factor by using a chip mounter method.

In addition, the inductor is capable of processing a high current of 100 Ah and can be used at a temperature of -40 degrees to 125 degrees, and is capable of maintaining a performance of more than 40 degrees even at an instantaneous temperature of 260 degrees.

The DC / DC converter converts the output of the rechargeable battery into a voltage suitable for an electronic device and outputs the converted voltage. The DC-DC converter includes a synchronous four-switch buck-boost switch capable of step-up and step- Can be implemented using a DC / DC controller.

For example, the synchronous four-switch buck-boost DC / DC controller operates in an input voltage range of 3.5V to 42V (up to 60V) to support voltages across a variety of electronic devices and includes voltage blocking, overvoltage protection, It can support various functions.

On the other hand, the FT-FET is a Schottky-plus technology that can control currents of 30 V and 300 A. It can generate a minimum electromagnetic wave and have a temperature characteristic capable of operating normally at 150 degrees .

The upper case 110 is coupled to the upper side of the main case 100 and has a connection jack 111 for connection with an external electronic device.

The lower case 120 is coupled to the lower side of the main case 100 and the upper case 110 and the lower case 120 may be made of a synthetic resin having a low thermal conductivity.

One side of the cable is connected to the connection jack 111 formed in the upper case 110 and the other side of the cable is connected to the electronic device so that power can be supplied from the rechargeable battery of the power supply device to the electronic device.

The power supply device according to an embodiment of the present invention can be used as an auxiliary battery for a vehicle. In this case, the power supply device is charged through a power source supplied from a main battery (not shown) provided in the vehicle, , A black box).

Here, the cable coupled to the connection jack 111 of the upper case 110 may be a cable having a 5-pin connection jack configured to be connected to the main battery of the vehicle and an electronic device (e.g., a black box) at one time.

According to an embodiment of the present invention, a part of the elements of the circuit board included in the power supply apparatus as shown in FIG. 1 is disposed on the lower side, a heat sink is disposed on the lower side of the circuit board, The heat radiation effect can be improved.

On the other hand, a heat radiation plate, which is configured to be in contact with a part of the main case, is disposed on the upper side of the circuit board, thereby further improving the heat radiation effect of the power supply device.

In addition, since a portion of the heat radiating plate disposed in the space between the upper case and the main case has a structure in which the opening is formed, heat generated in the circuit board or the like inside the power supply device is easily discharged to the outside, Therefore, even if the rechargeable battery is charged by using a high current to shorten the charging time, stable driving can be ensured without increasing the size.

FIG. 2 is an exploded perspective view for explaining an internal configuration of a power supply apparatus according to an embodiment of the present invention. The power supply apparatus 10 shown in FIG. 2 is the same as that described with reference to FIG. A description of what will be described below will be omitted.

Referring to FIG. 2, a rechargeable battery 130 is received and fixed in an inner space of the main case 100, and a circuit board 140 may be disposed above the rechargeable battery 130.

The rechargeable battery 130 and the circuit board 140 are connected to each other by a cable and the circuit board 140 and the connecting jack 111 of the upper case 110 are connected to each other using another cable, The main battery of the vehicle) to the rechargeable battery 130 and discharging the rechargeable battery 130 to an external electronic device (for example, a black box of the vehicle) are controlled by a plurality of elements formed on the circuit board 140 .

The heat dissipation plate 200 is disposed above the circuit board 140 and the heat dissipation plate 200 is disposed between the main case 100 and the upper case 110 so that at least a portion of the heat dissipation plate 200 is in contact with the main case 100. [ It can be fixed in space.

3 and 4, the heat dissipating plate 200 includes an outer frame 210 contacting the main case 100, an opening 220 having a shape drawn into the inner case so as not to contact the main case 100, As shown in Fig.

The heat dissipation plate 200 is made of a material having a high thermal conductivity, for example, made of the same aluminum as the main case 100, and can have EMI shielding function together with a heat radiation function.

In this case, heat generated in the circuit board 140 and the rechargeable battery 130 inside the main case 100 through the outer frame 210 of the heat dissipating plate 200 in contact with the main case 100, 100, and is diverted to the outside.

The opening 220 of the heat dissipating plate 200 which is not in contact with the main case 100 is exposed to the outside and a partial opening is formed between the main case 100 and the upper case 110, Internal heat generated in the circuit board 140 and the like can be effectively discharged through the opening 220 of the heat dissipating plate 200.

The openings 220 of the heat dissipating plate 200 may be formed on both sides of the heat dissipating plate 200. For example, as shown in FIG. 3, two openings 220 may be formed on both sides of the heat dissipating plate 200, (220) may be formed.

The heat dissipation plate 200 includes a first coupling portion 240 for fixing the heat dissipation plate 200 to the upper side of the circuit board 140 and a second coupling portion 240 for fixing the heat dissipation plate 200 to the upper case 110 2 coupling portions 230 are formed.

Referring to a cross-sectional view illustrating one embodiment of the configuration of the main case 100 shown in FIG. 5, a coupling member coupled at an upper side of the upper case 110 is coupled to a second coupling portion 230 And the heat dissipation plate 200 can be fixed between the upper case 110 and the main case 100 by being fastened to the upper case 110 and the plate fixing part 103 formed in the main case 100.

The rechargeable battery 130 accommodated in the inner space of the main case 100 can be supported and fixed by the rechargeable battery support part 104 formed on the inner surface of the main case 100. [

The heat generated in the main case 100 and the heat transmitted from the heat dissipating plate 200 are more efficiently discharged to the outside by the plurality of grooves formed in the vertical direction on the outer surface of the main case 100 as described above. .

The heat dissipation plate 200 may have at least one cable passage hole 250 or 251 through which cables may pass.

6, a cable 710 extending from the circuit board 140 is passed through the first cable passage hole 250 formed in the heat dissipating plate 200 to connect the connection jack 111 of the upper case 110 Can be connected.

The cable 720 extending from the rechargeable battery 130 can be passed through the second cable passage hole 251 formed in the heat dissipating plate 200 and connected to the connection jack 111 of the upper case 110.

A plurality of supports 700 connected to the circuit board 140 are coupled to the heat dissipating plate 200 by using the first coupling unit 240 of the heat dissipating plate 200 so that the heat dissipating plate 200 is connected to the circuit board 140, respectively.

Referring to FIGS. 2 and 6, a heat sink 300 may be disposed below the circuit board 140.

On the other hand, a part of the plurality of elements formed on the circuit board 140 may be disposed on the upper surface, and the remaining part may be disposed on the lower surface.

For example, one or more elements among the plurality of elements that generate the most heat are disposed on the lower side of the circuit board 140, and the heat sink 300 is coupled to the lower side of the circuit board 140, The heat generated from the elements disposed on the lower surface of the circuit board 140 is easily dissipated through the heat sink 300, thereby preventing the temperature of the elements formed on the circuit board 140 from rising excessively .

FIG. 7 shows an embodiment of the constitution of the elements formed on the upper side of the circuit board, and FIG. 8 shows an embodiment of the constitution of the elements formed on the lower side of the circuit board.

7, elements such as an inductor 141, a capacitor 142, and a DC / DC converter IC 143 may be disposed on the upper surface of the circuit board 140.

8, the FET 145 is disposed on the lower surface of the circuit board 140, and more specifically, eight FETs may be disposed on the lower surface of the circuit board 140.

As shown in FIG. 9, FET elements are disposed on the lower surface of the circuit board 140, and the heat sink 300 is coupled thereto, so that heat generated from the FET elements flows through the heat sink 300 Can be released.

According to another embodiment of the present invention, by using the power supply device having the above-described heat dissipation structure as an auxiliary battery for a vehicle, it is possible to charge the battery at a high speed from the main battery during operation of the vehicle, The power can be supplied stably for a long time.

10 is a view for explaining an embodiment of a configuration for connecting a power supply device according to the present invention to a main battery and an electronic device of a vehicle.

10, after the cable 1100 including five connection lines is connected to the connection jack 111 of the power supply apparatus 10, the "1" connection line is connected to the negative terminal of the main battery 1110 of the vehicle And the "2" connection line is connected to the + terminal of the main battery 1110 of the vehicle.

On the other hand, the connection line "3" is connected to the ACC of the electronic device 1120 such as a black box or the like and the ACC of the vehicle fuse box.

And the connection line "4" is connected to the negative terminal of the electronic device 1120, and the connection line "5" is connected to the positive terminal of the electronic device 1120.

While the preferred embodiments of the present invention have been described and illustrated above using specific terms, such terms are used only for the purpose of clarifying the invention, and it is to be understood that the embodiment It will be obvious that various changes and modifications can be made without departing from the spirit and scope of the invention.

10: power supply 100: main case
103: plate fixing part 104:
110: upper case 111: connection jack
120: lower case 130: rechargeable battery
140: circuit board 141: inductor
142: Capacitor 143: DC / DC converter
145: FET (FET) 200: heat dissipation plate
210: outer frame 220: opening
230, 240: coupling portion 250, 251: cable passage hole
300: heat sink 700: support
710, 720: Cable 1100: Connection cable
1110: main battery 1120: black box
1130: Vehicle fuse box

Claims (9)

1. A power supply for supplying power to an electronic device,
Rechargeable battery;
A circuit board disposed above the rechargeable battery and having a plurality of elements for controlling charging and discharging of the rechargeable battery;
A heat sink disposed below the circuit board and positioned between the circuit board and the rechargeable battery;
A main case having an internal space for accommodating the rechargeable battery, the circuit board, and the heat sink;
An upper case and a lower case respectively coupled to the upper and lower sides of the main case; And
And a heat dissipating plate disposed on the circuit board and being fixed to a space between the main case and the upper case so that at least a portion of the heat dissipating plate contacts the main case. The method according to claim 1,
Wherein a condenser, an inductor, and a DC / DC converter are disposed on an upper surface of the circuit board. The method according to claim 1,
And a field effect transistor (FET) is disposed on a lower surface of the circuit board. 2. The apparatus according to claim 1, wherein the main case
Wherein a plurality of grooves for increasing the surface area are formed. The method according to claim 1,
Wherein the plurality of elements are disposed on an upper surface and a lower surface of the circuit board. The heat sink according to claim 1,
An outer frame portion contacting the main case; And
And an opening having a shape drawn into the main case so as not to be in contact with the main case,
Wherein heat generated from the circuit board is discharged to the outside through an opening of the heat radiation plate exposed to the outside. The circuit board according to claim 1, wherein the circuit board
A first coupling unit for coupling a plurality of supports coupled to the heat dissipation plate to fix the heat dissipation plate on the upper side; And
And a second engaging portion for engaging with the heat sink to fix the heat sink to the lower side. The method according to claim 1,
A power source supplied from a main battery provided in the vehicle and being charged to supply power to the electronic equipment provided in the vehicle. 9. The method of claim 8,
And a main battery and an electronic device provided in the vehicle through a connection jack formed in the upper case.

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